Kenwood K2ET, K2E, TH-K2AT User Manual

144MHz FM TRANSCEIVER

TH-K2AT/K2E/K2ET

SERVICE MANUAL

© 2003-8 PRINTED IN JAPAN

B51-8658-00 (S) 836

Helical Antenna
(T90-1018-25)

Knob
(PTT/LAMP/MON)
(K29-9274-03)

Key top (16key)
(K29-9272-02)

Knob (ENC)
(K29-5159-03)

Knob (VOL)
(K29-5150-03)

Front glass
(B10-2746-03)

Cap
(SP/MIC/DC IN)
(B09-0675-03)

Cabinet assy
(16key)
(A02-3819-23)

Helical Antenna
(T90-1018-25)

Knob
(PTT/LAMP/MON)
(K29-9274-03)

Key top (4key)
(K29-9276-02)

Knob (ENC)
(K29-5159-03)

Knob (VOL)
(K29-5150-03)

Front glass
(B10-2746-03)

Cap
(SP/MIC/DC IN)
(B09-0675-03)

Cabinet assy
(4key)
(A02-3818-23)

TH-K2AT/K2ET TH-K2E

CONTENTS

DISASSEMBLY FOR REPAIR ...................................2

CIRCUIT DESCRIPTION ............................................ 6

SEMICONDUCTOR DATA ...................................... 14

COMPONENTS DESCRIPTION ..............................15

PARTS LIST.............................................................17

EXPLODED VIEW....................................................23

PACKING ................................................................. 25

ADJUSTMENT ........................................................ 27

TERMINAL FUNCTION........................................... 43

PC BOARD

TX-RX UNIT (X57-674X-XX) (A/3) ................... 44

TX-RX UNIT (X57-674X-XX) (B/3),(C/3) ..........48

SCHEMATIC DIAGRAM..........................................50

LEVEL DIAGRAM.................................................... 55

BLOCK DIAGRAM................................................... 56

BC-21 (WALL CHARGER) .......................................58

PB-43N (Ni-MH BATTERY PACK) ..........................58

BT-14 (BATTERY CASE) ......................................... 59

PG-4Y (PROGRAMMING INTERFACE CABLE) .....59

MCP-1A (MEMORY CONTROL PROGRAM) ......... 59

SPECIFICATIONS................................. BACK COVER

TH-K2AT/K2E/K2ET

CN2

CN9

CN6

x

x

c

c

v

m

b

,

,

.

ç

√

µ

∫

∫

∫

∫

∫

Ω

/

∫

≈

~

≤

n

z

TX-RX unit (B/3)

TX-RX unit (C/3)

TX-RX unit (A/3)

DISASSEMBLY FOR REPAIR

How to remove the case assembly from the chassis

1. Remove two screws (z) holding the chassis.

2. Pull out two knobs (

3. Pull out the SP and MIC parts of the cap from jacks (

4. Turn the unit over with the bottom of the chassis facing
upwards, and remove the chassis (
assembly (

5. Remove the speaker lead (
the TX-RX PC board (TX-RX unit A/3).

b

).

) and remove two round nuts (c).

x

) from the case

n

) from the connector (CN2) of

m

v

).

How to remove the PC board

■ Numeric key PC board (TX-RX unit B/3)

1. Remove three screws (,) on the numeric key PC board.

2. Lift the numeric key PC board and remove it from the

■ PTT PC board (TX-RX unit C/3)

3. Remove one screw on the PTT PC board (/).

4. Pull the PTT PC board to the left and remove it from the

■ TX-RX PC board (TX-RX unit A/3)

5. Remove the SP/MIC jack cover (≈).

6. Remove two screws (

7. Remove two screws (

8. Remove eight screws (

9. Absorb solder from the antenna terminal (

Note: Do not melt the shadow plate (

10.Remove the TX-RX PC board from the chassis, then remove

connector (CN9) of the TX-RX PC board (

.

).

connector (CN6) of the TX-RX PC board (TX-RX unit A/3)
(

Ω

).

) holding the shield

ç

cover (antenna terminal section).

) holding the shield

√

cover (final amplifier section).

board.

with a solder absorber.

) on the TX-RX PC

∫

µ

moving the tip of the solder absorber close
to the antenna terminal.

the encoder volume FPC (
of the TX-RX PC board.

) from the flat cable connector

≤

~

) when

)

2

TH-K2AT/K2E/K2ET

DISASSEMBLY FOR REPAIR

Soldering the antenna terminal

1. With the shield cover removed from the antenna terminal
section, install two screws on the PC board and bring the
PC board into contact with the chassis (

2. Solder the antenna terminal with a soldering iron (

z

).

).

x

x

z

3. Remove the two screws installed in step 1 above, and install
the two screws again on the PC board together with the
shield cover (

c

).

c

4. Apply the tips of soldering irons to all the four pins of the final
FET at the same time (
the final FET (

). (Two persons should be required to do this.)

v

v

5. Remove all PC boards from the chassis.

6. Confirm that there is no space between the radiation plate
installed on the foil side of the TX-RX PC board (TX-RX unit
A/3) and the PC board (
the radiation plate and PC board, eliminate it by applying
the tip of the soldering iron to the radiation plate.

), heat them sufficiently, and remove

c

c

). If there is any space between

b

b

Radiation plate

TX-RX PC board

Replacing the final FET (Q12)

1. Remove the two screws holding the shield cover of the
final FET section (

2. Remove solder from the shield cover completely with a
solder absorber. (E and E3 types only)

3. Remove the shield cover (

z

).

).

x

z

x

7. Apply the tip of the soldering iron to the installation side of the
radiation plate of the TX-RX PC board, put a little amount of
solder to the radiation plate that is seen through a square hole
in the final FET installation section and melt the solder (

8. When the solder in step 7 is melted, place the final FET on
the PC board by aligning it with the silk of the final FET
installation section of the PC board (

m

).

n

).

m

n

9. Release the soldering iron and confirm that the final FET

and radiation plate have been soldered.

10.Solder the four pins of the final FET with the soldering iron.

11.Install all the PC boards.

12.Reinstall the shield cover removed in step 3 above in its

original position and install two screws.

13.Solder the shield cover to the PC board. (E and E3 types

only)

14.

Install the chassis on the case assembly and assemble them.

15.Readjust transmission power.

Note: Since the FET is sensitive to static electricity, always

wear a grounding band. Use a highly insulated ceramic
heater solder iron.

3

TH-K2AT/K2E/K2ET

DISASSEMBLY FOR REPAIR

Special care and attention required for assembly

1. Gluing to the key top (MIC element section)

You must also glue on the speaker storage area and heap
the glue up until wealthy glued on the speaker storage area
and the key top for waterproofing the MIC element side of
the key top. (Fig. 1)

Heap the glue up until wealthy glued on the speaker
storage area and the key top (MIC element section).

Fig. 1

2.

Bending the LCD hardware fixture (J21-8456-03) tabs

(1)Insert the tabs of the LCD hardware fixture into four holes

in the LCD installing position of the TX-RX PCB (TX-RX unit

A/3). (Fig. 2)

Fig. 2

(2)By pressing the LCD hardware fixture from the component

side of the TX-RX PCB, you must bent all 4 tabs of the LCD
hardware fixture being visible from the foil side until the
bases of each tabs are folded at least 45 degrees (Fig. 3). If
the bending angle of the tabs of the LCD hardware fixture
is less than 45 degrees, a display error may occur.

Min 45
degrees

Bending position

NG
NG

Fig. 3

3. PTT PCB (TX-RX unit C/3) installation procedure

Installing the PTT PCB on the TX-RX PCB and chassis are
as follows:
(1)Insert the PTT PCB connector (CN7) into the TX-RX PCB

connector (CN6) lightly.
(2)Push three parts of the PTT PCB to contact tightly with the

chassis. There may be a small gap between the connectors.

(Fig. 4)
Note: A double-side adhesive tape (J99-0376-04) is used

behind the PTT switch. When reassembling the PTT
PCB to the chassis, press the PTT PCB (under the PTT
switch) so that the tape hold the PCB and chassis
securely.

Chassis

OK

PTT switch

Push three parts of the PTT PCB
to contact tightly with the chassis.

PTT PCB (C/3)

CN6

A bit
clearance

CN7

Chassis

NG

PTT switch

PTT PCB (C/3)

CN6

No
clearance

CN7

Fig. 4

(3)Tighten one screw in the PTT PCB.

4

TH-K2AT/K2E/K2ET

LAMP

LO

W

PTT

DISASSEMBLY FOR REPAIR

4. Packing (G53-1572-02) TX/BUSY lamp installation
procedure

(1)To assure waterproofing, install the packing in the chassis

groove as shown in Fig. 5. (

(2)Install the packing TX/BUSY lamp section on the chassis.

(

)

x

z

OK

Packing

Chassis

NG

Packing

Chassis

z

)

x

Cautions for installing the chassis on the case assembly

6.

(1)Verify that the packing (G53-1572-02) TX/BUSY lamp section

is has been past through the hole in the illumination guide
section on the top of the case assembly. (Fig. 7)

The packing TX/BUSY lamp section is has
been past through the hole in the illumination
guide section on the top of the case assembly.

Fig. 7

(2)Align the speaker lead as shown fig.8. Do not place the

leads over the key top section, LCD section or SP/MIC/DC
IN cap section.

Fig. 5

5.

Packing (G53-1572-02) bottom installation procedure

(1)Before installing the numeric key PCB (TX-RX unit B/3) on

the chassis, push three parts of the packing to contact tightly
with the chassis as shown in Fig. 6. If the packing is not in
contact with the chassis, there may be a gap between the
transceiver bottom case assembly and the battery, and
water may enter through the gap.

OK NG

Push three parts of the packing to
contact tightly with the chassis.

Clearance NG

Fig. 6

Do not fix this part of the
key top to the rib of the
case assembly.

Fig. 8

7.

Cautions for installing the key top on the case assembly

(1)Install the key top keypad section and the power switch

section on the rib of the case assembly.

(2)Do not fix the part between the key top keypad section and

the power switch section to the rib of the case assembly,
but install it as shown in Fig. 8.

5

TH-K2AT/K2E/K2ET

CIRCUIT DESCRIPTION

Frequency Configuration

The frequency configuration is shown in Figure 1 and

Table 1.

136.000~173.995MHz(K,K2,M,M2)

RX :

144.000~145.995MHz(E,E3)

TX :

ANT

ANT

SW

FINAL

DRIVE

144.000~147.995MHz(K,K2)

136.000~173.995MHz(M,M2)

144.000~145.995MHz(E,E3)

1st MIX

RF

AMP

PRE

DRIVE

144.000~147.995MHz(K,K2)

136.000~173.995MHz(M,M2)

144.000~145.995MHz(E,E3)

38.85MHz

174.850~212.845MHz
(K,K2,M,M2)

182.850~184.845MHz
(E,E3)

MCF

450kHz

CF

MIX, IF,

DET

Tripler

x 3

PLL

VCO

38.4MHz

AF

AMP

TCXO

MIC

AMP

SP

12.8MHz
MIC

Fig. 1 Frequency configuration

Double super heterodyne

Reception method 1st IF Frequency 38.85MHz (Upper)

2nd IF Frequency 450kHz (Lower)

Transmission method

VCO direct oscillation amplification

Modulation Variable reactance phase modulation

Table 1 Basic configuration

Receiver System

■ Front End

The received signal from the antenna passes through a low­pass filter and then through a transmission/reception switching
circuit (antenna switch) and enters the band-pass filter (L40,
L41, L38).

The signal passing through the band-pass filter (L40, L41,
L38) is amplified by with an RF amplifier (Q17), passes through
a band-pass filter (L32, L35) and enters the first mixer (Q16).

These band-pass filters are tuned to a desired frequency
by varicaps (D21, D20, D19, D18).

A tuning voltage corresponding to the desired signal is
applied to each varicap through the BPF/APC terminal (pin 6)
of the MPU (IC8) to tune to the receive frequency.

■ First Mixer

The received signal passing through the band-pass filter
(L32, L35) is mixed with the first local signal generated by the
VCO by the first mixer (Q16) to produce a first IF signal (38.85
MHz) (Upper heterodyne).

The first IF signal passes through a MCF (Monolithic crystal
filter: XF1) to remove unwanted components.

The first IF signal passing through the MCF (XF1) is amplified
by an IF amplifier (Q24) and the resulting signal enters the FM
IC (IC3).

Item Rating

Nominal center frequency (fo) 38.85MHz
Pass bandwidth ±6.0kHz or more at 3dB
Attenuation bandwidth ±25kHz or less at 35dB
Ultimate attenuation 70dB or more (fo –910 kHz)
Spurious response 40dB or more (fo +1MHz)
Ripple 1dB or less
Insertion loss 4dB or less
Terminating impedance 610Ω ±5% // 3pF ±0.5pF

Table 2 MCF (L71-0619-05) characteristics (TX-RX unit XF1)

Item Rating

Nominal center frequency (fo) 450kHz
3dB bandwidth ±6.5kHz or more
50dB bandwidth ±15.5kHz or less
Ripple 2dB or less (fo ±6.5kHz)

55dB or more

Guaranteed attenuation (fo ±18kHz to ±33kHz)

50dB or more (fo ±100kHz)
Insertion loss 4dB or less
I/O matching impedance 1.5kΩ

Table 3 Ceramic filter (L72-0968-05) characteristics (TX-RX unit CF1)

ANT

BPF

L41,L40,L38

ANT

SW

Tuning voltage

PLL

LV

LPF

VCO

6

RF AMP

Q17

D20D21

6

BPF/APC

MPU

IC8

Fig. 2 Receiver section configuration

D19

BPF

L32,L35

MIXER

D18

Q16

MCF

XF1

38.85MHz

1st Local OSC

(PLL)

IF AMP

Q24

5R5R

FM IC

IC3

IF AMP,

DET

2nd Local OSC

Tripler

x 3

TCXO

12.8MHz

AF AMP

IC6

Q23

X1

SP

TH-K2AT/K2E/K2ET

CIRCUIT DESCRIPTION

■ IF Circuit

The first IF signal (38.85 MHz) amplified by the IF amplifier (Q24)
and the second IF signal (38.4 MHz) generated by tripling the 12.8
MHz reference oscillator frequency of the TCXO (X1) by Q23, are
mixed in the FM IC to produce a second IF signal (450 kHz) (Lower
heterodyne).

The second IF signal passes through a ceramic filter (CF1)
to remove unwanted components.

The second IF signal passing through the ceramic filter (CF1)
passes through the IF amplifier in the FM IC again and is
detected to produced an audio signal.

■ Squelch and Mute Circuit

A noise component is obtained by passing FM detection
output (FM IC pin 9) through an operational amplifier in the

9

AFM

49

IC8

MPU

1st IF input
(38.85MHz)

SM

SQ

IC3

FM IC

2nd local OSC

(38.4MHz)

SMV

48

SQV

16 15 14 13 12 11 10 9

MIX

Noise
comp

Rectifier

Buffer

Local

OSC

1 2 3 4 5 6 7 8

CF1

450kHz

RSSI

IF AMP

5R

CD1

Quadrature

detector

C173 C174

Inverter

R135

R125

AF OUT

Noise
AMP

AMP

FM IC and band-pass filter consisting of R125, R126, R135,
C173, C174. The noise component is rectified in the FM IC to
produce a DC voltage, which is output from the N-REC terminal
(pin 14) of the FM IC as squelch voltage.

The squelch voltage enters the SQ terminal (pin 48) of the
MPU (IC8) and is compared with the reference voltage preset
in the MPU to control audio signal ON/OFF.

When "L" is output from the AFM terminal (pin 9) of the MPU,
the AF mute switch (Q20) is activated to mute the audio signal.

■ S Meter Circuit

The S meter voltage is output from the RSSI terminal (pin

12) of the FM IC (IC3) and input to the SM terminal (pin 49) of
the MPU. Then the voltage is converted from analog to digital
in the MPU to control the S meter display on the LCD.

VOL IN

Q20
AF MUTE
SWITCH

Q21
AF FILTER

LPF

R126

5R

Fig. 3 IF, Squelch, Mute and S meter circuit

■ AF Amplifier

The detected audio signal passes through an AF filter (Q21)

and enters an AF mute switch (Q20).

After passing through the AF mute switch (Q20), the signal
passes through an AF volume (VR201) and is amplified to a
specified output level with an AF amplifier (IC6).

The audio signal amplified with the AF amplifier (IC6) is
output through an internal speaker or an external speaker
jack (J4).

The beep tone and the DTMF signal are output from the
DTMF/BEEP terminal (pin 40) of the MPU (IC8), enters the AF
amplifier (IC6) and is output as a monitor tone.

IC3

FM IC

9

AF OUT

VR201

AF VOLUME

40

DTMF/BEEP

IC8

MPU

Q21

AF

FILTER

IC6

AF AMP

REM

46

Q20

AF MUTE

SWITCH

SPG

REM/TXD

SPK

AFO

Fig. 4 AF amplifier

J4
SP JACK

SP

7

TH-K2AT/K2E/K2ET

CIRCUIT DESCRIPTION

Transmitter System

■ Microphone Amplifier Circuit

The audio signal from the microphone passes through a

high-pass filter (IC5) and enters a microphone amplifier (IC16).

The signal passes through a pre-emphasis circuit, limiter
amplifier and splatter filter inside the microphone amplifier.
The splatter filter will remove distortion outside the audio band.

IC16

MIC AMP

MIC IC5

61

HPF

emphasis

Fig. 5 Microphone amplifier circuit

■ Modulation Circuit

The audio signal amplified by the microphone amplifier
(IC16) passes through a semi-fixed volume (VR5) for
modulation adjustment, and goes to the VCO modulation
varicap (D6) for variable reactance phase modulation.

■ Drive and Final Circuit

The output signal from VCO (Q1) passes through an RF
amplifier (Q2, Q5, Q9) and drive amplifier (Q10, Q11), and is
amplified by a power amplifier (Q12).

■ Transmission/Reception Switching Circuit

The signal amplified by the power amplifier (Q12) passes
through a transmission/reception switching circuit and a low­pass filter, and is fed to the antenna.

Q11

Q10

Pre-

Limiter

VCO

Splatter

filter

Q12

The transmission/reception switching circuit consists of D10,
L19, D12 and D13. These diodes are turned ON in transmit
mode and OFF in receive mode to switch signals.

MIC

IC5

HPF

AMP

DRIVE AMP

Q10

DRIVE AMP

IC16
MIC

Q11

VR5

MAX DEV

Q12

POWER AMP

Q1

VCO

Q2

RF AMP

D10,L19
D12,D13

ANT

SW

RF AMP

LPF

Q5

ANT

Q9

RF AMP

Fig. 6 Modulation, Drive, Final and

Transmission/reception switching circuit

■ APC Circuit

The APC (Automatic Power Control) circuit is used to obtain
a stable transmission power and controls transmission output
by detecting the drain current of Q11 and Q12.

The transmission output can be changed in three levels:
High, Mid, and Low.

The reference voltage is output from the BPF/APC terminal
(pin 6) of the MPU (IC8) and the detection voltage generated by
R70, R71 and R72 are fed to the APC differential amplifier (IC2).

The voltage in proportion to the difference between
reference voltage and detection voltage is output from the
BOUT terminal (pin 7) of IC2 as an APC voltage.

ANT

D10

LPF

L19

D13

RX

Q55

–t

TH1

+

51

THERM

7

KAPC

6

BPF/APC

IC8

MPU

FINAL

16

Q58

D12

VGG

Q15

5T

R72

R71

R70

B

Q13

B

8

Fig. 7 APC and Temperature protection circuit

1

2

3

4

VDD

APC AMP

AOUT

A–IN

A+IN

GND

IC2

BOUT

B–IN

B+IN

8

V+

7

6

5

Q14

TH-K2AT/K2E/K2ET

Fo/LD

PLL LD

IC8

MPU

IC1

PLL IC

R32

D16

C40

R35

14

102

5C

CIRCUIT DESCRIPTION

The APC voltage controls the gate voltage of Q11 and Q12,

and keeps transmission output stable.

The MPU detects power supply voltage and controls Q58
by transmission power supply voltage and transmission power.
For example, if the power supply voltage during transmission,
is equal to or higher than approx. 10.5 V and if power is at Mid
or Low level, the APC voltage level applied to Q12 is reduced
by Q58.

■ Temperature Protection Circuit

To prevent thermal destruction of the power amplifier (Q12),
this circuit reduces APC voltage when Q12 temperature rises.

The MPU (IC8) detects temperature with a thermistor (TH1)
and controls reference voltage to the APC circuit.

PLL System

■ PLL Circuit

A reference frequency of 5 kHz or 6.25 kHz is produced by
dividing the 12.8 MHz reference frequency of the TCXO (X1)
with PLL IC (IC1). Comparison frequency is produced by

TO

5C
5/0V

5MS
5/0V

TCXO

VR1

VC

X1

TCXO

12.8MHz

12.8MHz

IF

5C
5/0V

CLOCK

DATA

Fo/LD

PLL

IC1

PLL IC

LE

Rectifier

LOOP

FILTER

LPF Q6

amplifying VCO output with an RF amplifier (Q6) and dividing
it with the PLL IC.

The PLL synthesizer with 5 kHz and 6.25 kHz step is
configured by comparing phases of the reference frequency
and comparison frequency.

The phase difference between reference frequency and
comparison frequency passes through a charge pump in the
PLL IC, then ripples are removed with a loop filter with low­range passing characteristics to produce VCO control voltage
(lock voltage).

■ VCO Circuit

The VCO produces a desired frequency directly with a
Colpits oscillation circuit containing an oscillation transistor (Q1)
used for both transmission and reception.

The VCO control voltage is applied to varicap (D1, D2) to
produce a desired frequency.

The SHIFT terminal (pin 113) of the MPU (IC8) goes "H"
during reception, and the shift control switch (Q3) is turned
ON to change oscillation frequency.

VCO

Q4

Ripple

D1,D2

Q3

SHIFT

Filter

SW

Q1

OSC

MOD

Q2

Buff
Amp

Q5

Amp

RF

RF

Amp

LV
1~5V

5C
5/0V

SHIFT

H/L

D8,D9

SW

TX
RX

5T 5/0V
5R 5/0V

Fig. 8 PLL and VCO circuit

■ Unlock Detection Circuit

When the PLL is unlocked, the waveform of the pulse
output from the Fo/LD terminal (pin 14) of the PLL IC (IC1) is
rectified with R32, D16, R35 and C40, and the Fo/LD terminal
is made “L” level. The voltage at the Fo/LD terminal is
detected by the MPU to control transmission/reception
switching timing.

MOD

Fig. 9 Unlock detection circuit

9

TH-K2AT/K2E/K2ET

CIRCUIT DESCRIPTION

Power Supply Circuit

■ Charging Circuit

When an external power supply is connected to the DC IN
terminal, the constant-current circuit consisting of Q33 and
D31 provides a constant current of approx. 110 mA to the Ni­MH battery.

If no external power supply is connected to the DC IN
terminal, the constant-current circuit does not function.

IC8
MPU

BTEMP
DCDET

VR1
ENC

IC1
TCXO
Q4,5,6
D40,41

IC5
Q30

IC3,17
D9,14
Q16,17
Q22,23,24
Q59

Q9,10,13
D8,10
TH1
IC16
Q47

5MS

5MV

5C

5R

5T

Q41
RN2105

5MS SW

Q57
RN2105

5C SW

Q53
RN2701

5R SW
5MV SW

Q55
CPH3317

5T SW

5M

IC9
TK11250

CM

AVR

5.0V

IC12
TK11250

CUCB

AVR

5.0V

D35

RB521S-30

PROTECT

D36

RB521S-30

PROTECT

IC6
D48,49
D42,43,46
D47,44

AF AMP

Q36
2SJ347

THERM
DET

BTDET

Q35
2SK1830

DC-IN
DET

Q37, Q38
2SB1184
(Q,R)
2SC4617(R)
AF/LAMP
AVR

IC4

XC6202PB
52FR

AVR

11.5V

■ Power Supply Switching Circuit

The voltage supplied through the battery terminal or DC IN
terminal is branched in the power supply switching circuit as
shown in Fig.10 and then supplied to the required components.

■ Battery Type Recognition Circuit

When the battery pack is attached to the transceiver, the
battery type is recognized with the T terminal on the
transceiver. This battery type recognition activates charging
for the Ni-MH battery pack and displaying the battery meter.

-

T

+

BATT TERMINAL

7.5V Norminal
(6.0 - 9.0V)

Q33
2SB1184

(Q,R)

BATT

D31
DA221

CONSTANT
CURRENT

B

CHARGE

Q34
2SK1830

CHARGE
SW

D30

RB521S-30

PROTECT

CHARGE

D80

RB521S-30

PROTECT

D33

RB051L-40

PROTECT

B

D32

RB051L-40

PROTECT

DC IN

13.8V Norminal
(12.0 - 16.0V)

B

J2

Fig. 10 Charging and Power supply switching circuit

Control System

■ Reset and Backup Circuit

When power is supplied to the transceiver, the 5M voltage

goes “H” as C303 is charged.

A rising edge of the 5M voltage is detected by the voltage
detection IC (IC11) and when its output (RESET) goes “H”,
the reset status of the MPU is released.

5C

IC11

IN OUT

IC10

IN OUT INT

BATT

D35

IC9

IN OUT

5V

AVR

R244

C303

5M

+

If the supplied voltage to the transceiver is reduced and
the 5M voltage falls below the detection voltage of the voltage
detection IC (IC10), the MPU detects it by an interrupt
processing, backs up data in EEPROM (IC15) and turns the
power off.

Timing chart

Power

ON

5V5M

0

5VRESET

0

5VINT

Power

OFF

R243

C307

L63

IC15

EEPROM

IC8

MPU

RESET

10

0

Fig. 11 Reset and Backup circuit

TH-K2AT/K2E/K2ET

CIRCUIT DESCRIPTION

■ Voltage Detection Circuit

Various voltages are input to the A/D port of the MPU (IC8)

for processing.

Battery voltage is divided with resistors (R240, R241) and

enters the BATT terminal (pin 52) of the MPU.

Battery voltage is used for battery meter indication during
transmission or for alert tone processing when an abnormal
power supply voltage (approx. 16.5 V or higher) is applied.

Squelch voltage becomes DC voltage by detecting changes
in noise voltage in the FM IC (IC3), and the signal is used for
squelch control.

The S meter voltage is output from the RSSI pin of the FM
IC to control S meter display.

Detection of thermistor voltage (temperature) in the Ni-MH
battery during charging, detection of remote microphone key
pressing and VOX voltage monitoring are performed through
each A/D port of the MPU.

■ Battery Save Circuit

If there is no signal (squelch off, scan off or no key operation)
for longer than 10 seconds, the transceiver will enter the
battery save mode.

Battery save operation is performed by controlling Q57 with
an output signal from the 5C (SAVE) terminal (pin 15) of the
MPU.

The 5C ON/OFF cycle ratio during battery saving can be set
from a transceiver menu.

■ LED Drive Circuit

The LCD and key illumination LEDs are lighted by controlling
Q51 for the LCD and Q50 for keys according to the output
voltage from the AF/LAMP AVR (Q37).

The BUSY and TX illumination LEDs are lighted by controlling
Q47.

Q47

D46

Q51

56

99

LAMP

RX LED

5T

AF AMP

D33

Q38

Q37

D48

D42

D42

D42

D44

D49

D43

D43

D43

D47

Q50

D41

BUSY LED

5C

TX LED

D40

R227

R226

B

Fig. 13 LED drive circuit

IC8

MPU

5MS

Q41

37

5MS

5C (SAVE)

IC8

MPU

5C

Q57

15

Fig. 12 Battery save circuit

5M

11

TH-K2AT/K2E/K2ET

CIRCUIT DESCRIPTION

■ Key and Encoder Input Circuit

The POWER key is assigned to the interrupt port (pin 95) of

the MPU.

The PTT key is assigned to the dedicated port (pins 13, 14)

of the MPU.

16 key (K, K2, M, M2 and E3 types)

KIN1 KIN2 KIN3 KIN4

KIN0 KOUT0 KOUT1 KOUT2 KOUT3

MENU

F321

LAMP

VFO654

MONI

MR987

SET

CALL

∗

#0

Other keys composes a matrix and key presses are detected

by scanning them by software.

The encoder reads data using the interrupt port (pins 35

and 36) of the MPU.

IC8

MPU

PWRSW

SW

PTTI14PTTE13ENCB36ENCA

95

S7POWER

35

ROTARY

ENCODER

4 key (E type)

IC8

KIN0 KOUT0 KOUT1 KOUT2 KOUT3

KIN1 KIN2 KIN3 KIN4

MRVFOF

MENUCALL

LAMP

MONI

SET

MPU

Fig. 14 Key and Encoder input circuit

PWRSW

POWER

SW

J3

PTTI14PTTE13ENCB36ENCA

95

S7

J3

35

ROTARY

ENCODER

12

TH-K2AT/K2E/K2ET

CIRCUIT DESCRIPTION

■ CTCSS/DCS

The encode signal is generated by the MPU (IC8) and output

from the TONE terminal (pin 41) of the MPU.

The unwanted high-frequency components of the encode
signal output from the MPU are removed with a low-pass filter,
and applied to VCO modulation input (MOD) and TCXO VC
terminal for modulation.

The VCO and TCXO modulation levels are adjusted by VR6
to produce flat modulation characteristics in low and high
ranges.

The decode signal is input to the SIGIN pin (pin 47) of the
MPU after the waveform of the audio signal from the FM IC is
rectified with a CTCSS/DCS filter (IC17). Then the set CTCSS
tone frequency and DCS code are detected by digital signal
processing in the MPU to control muting.

X1

TCXO

VC

VCO

VR6

MOD

VR5

1
MIC

AMP

6

LPF

AMP

IC16

50

■ DTMF

The DTMF signal is generated by the MPU (IC8) and is

output from the DTMF/BEEP terminal (pin 40) of the MPU.

The DTMF signal is mixed with an audio signal at the input

side of the AF amplifier (IC6), and is output as a monitor tone.

The DTMF signal is mixed with a modulation signal at the
input side of pre-emphasis in the microphone amplifier (IC16)
and used as a transmit signal.

■ VOX

The IC5 and Q30 amplify the audio signal captured in the
microphone, and then the signal is converted into the DC
Voltage D24 rectifies.

The DC voltage activates the MPU (IC8), and the VOX starts.

■ Weather Alert (K and K2 types only)

The IC17 apmlifies the detected signal from the FM IC (IC3),
and the MPU (IC8) processes the signal. This signal processing
activates Weather Alert function.

41
TONE

SIG INVOX IN

IC8

MPU

DTMF/BEEP

40

111

NOAA K, K2 types only

47

CTCSS/DCS

IC17D24Q30 IC3

9

FILTER

FM

IC

MIC

IC5

HPF

IC6

AF AMP

Vin

VOL OUT

Fig. 15 CTCSS/DCS, DTMF, VOX, Weather alert

■ Serial Control

Serial control must be enabled from a transceiver menu so
that the REM/TXD pin of the speaker jack (J4) and the PTT
(RXD) pin of the microphone jack (J3) function as TXD and
RXD, respectively, when communicating with a personal
computer.

MIC JACK

J3

J4

SP JACK

PTT
MIC

IM

REM/TXD

SP

5MS

SPG

SPK
AFO

IC5

HPF

5MC

10

+
–

POUT

IC6

AF AMP

MIC

46

REM

IC8

MPU

13

PTTE

TXD
RXD

12
11

Fig. 16 Serial control

13

TH-K2AT/K2E/K2ET

SEMICONDUCTOR DATA

MPU : 90522BPFFG139 (IC8)

■ Pin function

Pin Pin
No. Name

1 CLOCK O Common serial clock output
2 DATA O Common serial data output
3 EEPDI I Data input from EEPROM
4 EEPCS O Chip select output to EEPROM
5 VOX O VOX power supply switch L:ON

BPF/APC

6
7 KAPC O APC ON/OFF switch L:APC ON

8 VCC - Positive power supply

9 AFM O AF mute switch L:Mute
10 SPM O Speaker mute switch H:Mute
11 RXD I UART data input line from PC (9600bps)
12 TXD O UART data output line to PC (9600bps)
13 PTTE I External [PTT] key input L:ON
14 PTTI I [PTT] key input L:ON
15

5C(SAVE)
16 FINAL O
17 SEG0 O LCD segment output 0

18 SEG1 O LCD segment output 1
19 SEG2 O LCD segment output 2
20 SEG3 O LCD segment output 3
21 SEG4 O LCD segment output 4
22 SEG5 O LCD segment output 5
23 SEG6 O LCD segment output 6
24 SEG7 O LCD segment output 7
25 SEG8 O LCD segment output 8
26 SEG9 O LCD segment output 9
27 SEG10 O LCD segment output 10
28 SEG11 O LCD segment output 11
29 SEG12 O LCD segment output 12
30 SEG13 O LCD segment output 13
31 SEG14 O LCD segment output 14
32 SEG15 O LCD segment output 15
33 VSS - GND

34 COR1
35 ENCA I Encoder A side input

36 ENCB I Encoder B side input
37 5MS O 5MS main power supply switch L:ON
38 DVCC - Reference voltage input for DAC
39 DVSS - Ground for DAC

DTMF/
40

BEEP 1750Hz (D/A)
41 TONE O
42 AVCC - Positive power supply for ADC

43 AVRH - Reference voltage input for ADC
44 AVRL - Ground reference voltage input for ADC
45 AVSS - Ground for ADC

46 REM I

47 SIGIN I

14

I/O Function

BPF tuning voltage output, APC voltage

O

output (PWM)

O Save power supply switch L:ON

Gate bias control of TX final amplifier

L:Bias ON

- Power supply stabilization (Connected to
VSS through 0.1uF)

Encode waveform output of DTME/BEEP/

O

Encode waveform output of CTCSS/DCS
(D/A)

Remote control microphone key voltage
input (A/D)
Decode waveform input of CTCSS/DCS
(A/D)

Pin Pin
No. Name

48 SQ I Noise voltage input for squelch (A/D)
49 SM I RSSI voltage input for S-meter (A/D)
50 VOXIN I Microphone voltage input for VOX (A/D)
51 THERM I TX temperature compensation input(A/D)
52 BATT I Battery voltage input (A/D)

53 BTEMP I
54 VCC - Positive power supply
55

CHARGE
56 LAMP O Lamp power supply switch H:ON
57 AFAMP O
58 NAR O Wide/Narrow switching H:Narrow

59 COM0 O LCD common output 0
60 COM1 O LCD common output 1
61 COM2 O LCD common output 2
62 COM3 O LCD common output 3
63 VSS - GND
64 SEG16 O LCD segment output 16
65 SEG17 O LCD segment output 17
66 SEG18 O LCD segment output 18
67 SEG19 O LCD segment output 19
68 SEG20 O LCD segment output 20
69 SEG21 O LCD segment output 21
70 SEG22 O LCD segment output 22
71 SEG23 O LCD segment output 23
72 SEG24 O LCD segment output 24
73 NC - Not used
74 NC - Not used
75 SEG25 O LCD segment output 25
76 SEG26 O LCD segment output 26
77 SEG27 O LCD segment output 27
78 SEG28 O LCD segment output 28
79 SEG29 O LCD segment output 29
80 SEG30 O LCD segment output 30
81 SEG31 O LCD segment output 31
82 V0 - Not used
83 V1 - Not used
84 V2 - Not used
85 V3 - LCD drive power supply 3
86

HST(VCC)
87 MD2 I L fixed
88 MD1 I H fixed
89 MD0 I H fixed
90 RESET I Reset input L:Reset
91 VSS - GND
92 X0 I System clock (7.9872MHz)
93 X1 O System clock (7.9872MHz)
94 VCC - Positive power supply
95 PWRSW I Power switch interrupt input (↓)
96 INTUP I Power supply voltage interrupt input (↑)
97 INTDW I Power supply voltage interrupt input (↓)

I/O Function

Detection of thermistor voltage (temperature)
in the Ni-MH battety (A/D)

Battery charge circuit power supply switch

O

AF amplifier/Lamp AVR power supply
switch H:ON

I Not used (VCC)

H:ON

TH-K2AT/K2E/K2ET

SEMICONDUCTOR DATA / COMPONENTS DESCRIPTION

Pin Pin

No. Name

98 DCDET I

99 RXLED O Busy LED output H:ON
100 BSFT O Beat shift swiching output H:ON
101 PLLEN O Serial enable output to PLL IC
102 PLLLD I
103 KIN0 I Key matrix input 0
104 KIN1 I Key matrix input 1
105 KIN2 I Key matrix input 2
106 KIN3 I Key matrix input 3
107 KIN4 I Key matrix input 4
108 TYPE I Market code bit input
109 VUKEY I Detection of 4 key or 16 key
110 MICM O Microphone mute switch H:Mute
111 NOAA I 1050Hz tone detection input
112 5R O RX power supply switch L:ON
113 SHIFT O VCO shift switch L:TX, H:RX
114 5T O TX power supply switch L:ON
115 KOUT0 O Key matrix output 0
116 KOUT1 O Key matrix output 1
117 KOUT2 O Key matrix output 2
118 KOUT3 O Key matrix output 3
119 VSS - GND
120 BTDET O Battery detection switch L:ON

I/O Function

DC IN detection interrupt input (↓)
L:DC IN connected

Lock detection input from PLL IC H: Lock

COMPONENTS DESCRIPTION

TX-RX UNIT (X57-674X-XX)

Ref. No.

IC10

IC11
IC12 5.0V AVR

IC15 EEPROM
IC16

IC17

Q5,6,9 RF amplifier

Q10,11

Q12
Q13

Q14

Q15
Q16 1st mixer

Q17
Q20
Q21 Audio filter Active filter
Q22
Q23 Tripler 2nd local

Q24 IF amplifier 1st IF 38.85MHz
Q27

Q29

Q30

Q31
Q33

Use/Function

IC1 PLL IC

APC differential

IC2

amplifier
IC3 FM IC
IC4 11.5V AVR
IC5 HPF Active filter
IC6 AF amplifier
IC8 MPU
IC9 5.0V AVR

4.4V voltage

detection

3.3V voltage

detection

MIC amplifier

CTCSS/DCS/WX

filter
Q1 VCO
Q2 RF amplifier

VCO shift
Q3

control switch
Q4 Ripple filter

Drive amplifier

Power amplifier

APC circuit

operation switch

APC output

switch

Q10 operation

switch

RX 1st amplifier

Audio mute

switch

Wide/narrow

changeover switch

Wide/narrow

changeover switch

MIC mute

switch

VOX detection

amplifier

Q56 operation

switch

Charge switch

Operation/Condition/Compatibility

MPU INT voltage detection

MPU Reset voltage detection

Limiter, splatter filter
Active filter

On RX

On TX

On TX

On TX

Audio mute when off

On when wide is selected

On when wide is selected

Mutes when ON

Off when the speaker outputs audio

15

TH-K2AT/K2E/K2ET

COMPONENTS DESCRIPTION

Ref. No.

Q34
Q35
Q36

Q37

Q38
Q41 5MS switch On when 5MS is applied
Q47
Q50

Q51
Q52
Q53
Q55 5T switch On when 5T is applied

Q56
Q57 5C switch On when 5C is applied
Q58

Q59

D1,2

D10-13

D14

D15
D16
D17

D18-21

D22
D24

D25
D26
D27

D30

D31

D32

Use/Function

Q33 operation
switch
DC IN detection
Ni-MH temperature
detection
AF amplifier/
Lamp AVR
Q37 operation
switch

TX/BUSY LED
switch
Key LED switch
LCD LED switch
Beat shift switch
5R/5MV switch

Speaker mute
switch

Q12 gate
voltage switch
WX detection
amplifier
VCO frequency
control

D5

Frequency shift

D6

VCO modulation
D7 Speed up Ripple filter
D8 RF switch On TX
D9 RF switch On RX

Antenna switch

Reverse current

prevention

APC output

voltage limiter

PLL lock detection

Over input

protection

RX BPF tuning

MIC mute control

VOX detection

rectification

Speaker mute

speed up

C246 discharge

MIC ALC

rectification

Reverse current

prevention

Constant-current

circuit

Reverse current

prevention

Operation/Condition/Compatibility Ref. No.

On when charging
H: DC IN detection

On when temperature detection is
activated

On when the speaker outputs audio or
lamp lights

On when the key LED lights
On when the LCD LED lights

On when 5R or 5MV is applied

Off when High power is selected

On TX
APC reference voltage

Charge current

Constant-current charge

DC IN

Use/Function

Reverse current

D33

prevention
AVR

D34

constant-voltage
Reverse current

D35

prevention
Reverse current

D36

prevention
D40 TX LED Lights on TX
D41 BUSY LED Lights on RX

D42-44
D46,47

D48,49

D62-65

D69-72

D74,79 Limiter

Key illumination

LED

LCD illumination

LED

Key type
D60

detection

market code

detection

Reverse current

prevention
D73 Voltage drop

Reverse current
D80

prevention

Operation/Condition/Compatibility

Battery

Battery

DC IN

Key backlight illumination

LCD backlight illumination

Key matrix

16

PARTS LIST

New Parts. indicates safety critical components.

∗

Parts without Parts No. are not supplied.
Les articles non mentionnes dans le Parts No. ne sont pas fournis.
Teile ohne Parts No. werden nicht geliefert.

TH-K2AT/K2E/K2ET (Y50-580X-XX)
TX-RX UNIT (X57-674X-XX)

Ref. No.

1 3A,2G * A02-3817-02 CABINET ASSY(BATTERY CASE) K2,M2
21C*A02-3818-23 CABINET ASSY(4KEY) E
31A*A02-3819-23 CABINET ASSY(16KEY) K,K2,M
31A*A02-3819-23 CABINET ASSY(16KEY) M2,E3
4 3A,3C * A10-4066-11 CHASSIS

5 3B,3D * A82-0053-02 REAR PANEL

6 1B,1D * B09-0675-03 CAP(SP/MIC/DC IN)
7 1A,1C * B10-2746-03 FRONT GLASS
8 1B,1D * B11-1805-03 ILLUMINATION GUIDE(LCD)
9 2B,2D * B11-1806-04 FILTER(LCD)
10 1B,1D * B38-0881-05 LCD

11 1G * B62-1695-00 INSTRUCTION MANUAL(CHINESE) M2
11 1E,1G * B62-1696-00 INSTRUCTION MANUAL(ENGLISH)
11 1E,1G * B62-1697-00 INSTRUCTION MANUAL(SPANISH) K,K2,E
11 1E * B62-1697-00 INSTRUCTION MANUAL(SPANISH) E3
11 1E * B62-1699-00 INSTRUCTION MANUAL(GERMAN) E,E3

11 1E * B62-1702-00 INSTRUCTION MANUAL(ITALIAN) E,E3
11 1E * B62-1757-00 INSTRUCTION MANUAL(FRENCH) E,E3
11 1E * B62-1758-00 INSTRUCTION MANUAL(DUTCH) E,E3
12 3A * B72-2128-04 MODEL NAME PLATE(TH-K2AT) K,K2,M
12 3A * B72-2128-04 MODEL NAME PLATE(TH-K2AT) M2

12 3C * B72-2129-04 MODEL NAME PLATE(TH-K2E) E
12 3A * B72-2193-04 MODEL NAME PLATE(TH-K2ET) E3

13 2B,2D * E04-0443-05 RF COAXIAL RECEPTACLE(SMA)
14 2A,2C * E23-1234-04 TERMINAL(BATTERY)
15 2B,2D * E29-1199-04 INTER CONNECTOR(LCD)
16 1A,1C * E37-1106-05 LEAD WIRE WITH CONNECTOR(SP)

17 2A,2C * F10-2464-04 SHIELDING COVER(FINAL FET)
18 2A,2C * F10-2465-04 SHIELDING COVER(ANT TERMINAL)
19 2B,2D * F15-1008-04 SHADOW PLATE(LCD)

-*G10-1317-04 FIBROUS SHEET(SP NET)
21 3B,3D G53-1529-04 PACKING(VOL/ENC)
22 2A,2C * G53-1572-02 PACKING(CASE)
23 2B,2D * G53-1589-03 PACKING(SP/MIC)

24 3E * H52-1960-02 ITEM CARTON CASE(TH-K2AT) K,M
24 3E * H52-1961-02 ITEM CARTON CASE(TH-K2E) E
24 3E * H52-1962-02 ITEM CARTON CASE(TH-K2ET) E3
25 2H * H52-2009-02 ITEM CARTON CASE(TH-K2AT) K2,M2
26 2F * H12-3146-01 PACKING FIXTURE K,M,E

26 2F * H12-3146-01 PACKING FIXTURE E3
27 3G * H12-3147-03 PACKING FIXTURE K2,M2

28 2A,2C * J19-5451-03 HOLDER(TERMINAL)
29 1B,1D * J21-8456-03 HARDWARE FIXTURE(LCD)
30 2E,3G * J29-0709-04 BELT HOOK ASSY ACCESSORY
31 2A,2C * J30-1284-04 SPACER(PTT KNOB)
32 3E,2G J69-0342-05 HANDSTRAP ACCESSORY M,M2,E

32 3E J69-0342-05 HANDSTRAP ACCESSORY E3
33 2B,2D J82-0076-05 FPC(VOL/ENC)
45 3A,3C J99-0376-04 ADHESIVE TAPE
34 1B,1D K29-5150-03 KNOB(VOL)
35 1B,1D K29-5159-03 KNOB(ENC)

E : TH-K2E K : TH-K2AT M : TH-K2AT
E3 : TH-K2ET K2 : TH-K2AT M2 : TH-K2AT

Address

New

Parts No. Description

parts

TH-K2AT/K2E/K2ET

Destination Destination

TH-K2AT/K2E/K2ET

L:

Scandinavia

Y:

PX (Far East, Hawaii)

Y:

AAFES (Europe)

Ref. No.

36 1A * K29-9272-02 KEY TOP(16KEY) K,K2,M
36 1A * K29-9272-02 KEY TOP(16KEY) M2,E3
37 1A,1C * K29-9274-03 KNOB(PTT/LAMP/MONI)
38 1C * K29-9276-02 KEY TOP(4KEY) E

A 2B,2D N09-1492-05 PAN HEAD SCREW(SMA)
B 1B,1D N14-0569-04 CIRCULAR NUT(VOL/ENC)
C 1B,1D N14-0573-04 CIRCULAR NUT(SMA)
D 1A,1C N79-2035-46 PAN HEAD TAPTITE SCREW(PCB)
E 2A,2C N79-2040-45

F 3A,3C N82-2007-46 PAN HEAD TAPTITE SCREW(CASE)
G 2A,2C N09-2433-05

39 2B,2D R39-0602-05 VARIABLE RESISTOR

40 1A,1C T07-0341-15 SPEAKER
41 2F,3G * T90-1018-25 HELICAL ANTENNA ACCESSORY

42 2F * W08-0959-15 CHARGER(230V/13.8V) ACCESSORY M,E,E3
43 2E * W08-0960-15 CHARGER(120V/13.8V) ACCESSORY K
44 2E * W09-0991-05
44 2E * W09-0991-05

Address

0-11 : K, K2 0-21 : M, M2 2-71 : E 2-72 : E3

D40 B30-2156-05 LED(RED)
D41 B30-2157-05 LED(YELLOW)
D42-44 B30-2205-05 LED(YG) E3
D42-44 B30-2205-05 LED(YG) K,K2,M
D42-44 B30-2205-05 LED(YG) M2

D42,43 B30-2205-05 LED(YG) E
D46 B30-2205-05 LED(YG) E
D46,47 B30-2205-05 LED(YG) E3
D46,47 B30-2205-05 LED(YG) K,K2,M
D46,47 B30-2205-05 LED(YG) M2

D48,49 B30-2237-05 LED(YG)

C1 CK73HB1C103K CHIP C 0.010UF K
C2 CK73HB1H102K CHIP C 1000PF K
C3 CC73GCH1H030B CHIP C 3.0PF B
C4 CK73HB1H102K CHIP C 1000PF K
C5 CK73HB1A104K CHIP C 0.10UF K

C6 CK73HB1H102K CHIP C 1000PF K
C7 CC73HCH1H0R5B CHIP C 0.5PF B
C8,9 CC73GCH1H270G CHIP C 27PF G
C10 CK73HB1C103K CHIP C 0.010UF K
C11 CK73HB1H102K CHIP C 1000PF K

C13 CC73GCH1H0R5B CHIP C 0.5PF B
C14 CK73HB1H102K CHIP C 1000PF K
C15 CC73HCH1H120J CHIP C 12PF J
C17,18 CK73HB1H102K CHIP C 1000PF K
C19 CC73HCH1H150J CHIP C 15PF J

C20 CC73HCH1H080D CHIP C 8.0PF D
C21 CK73HB1H102K CHIP C 1000PF K
C22 CC73HCH1H180J CHIP C 18PF J
C24-26 CK73HB1H102K CHIP C 1000PF K
C27 C92-0628-05 CHIP-TAN 10UF 10WV

C30 CK73HB1H102K CHIP C 1000PF K

K:

New

parts

USA

T:

England

X:

Australia

P:

Canada

E:

Europe

M:

Other Areas

Parts No. Description

PAN HEAD TAPTITE SCREW(HOLDER,R PANEL)

PAN HEAD TAPTITE SCREW(FINAL FET)

BATTERY ASSY(7.2V/1100MAH) ACCESSORY
BATTERY ASSY(7.2V/1100MAH) ACCESSORY

TX-RX UNIT (X54-674X-XX)

K,M,E
E3

17

TH-K2AT/K2E/K2ET

PARTS LIST

TX-RX UNIT (X57-674X-XX)

New

Ref. No.

C33 C92-0002-05 CHIP-TAN 0.22UF 35WV
C34 C92-0714-05 TANTALUM 4.7UF 6.3WV
C35 C92-0001-05 CHIP-C 0.1UF 35WV
C37 CK73HB1H102K CHIP C 1000PF K
C38 CK73HB1C103K CHIP C 0.010UF K

Address

Parts No. Description

parts

Destination

New

Ref. No.

C136 CC73HCH1H100D CHIP C 10PF D
C137 CC73HCH1H050C CHIP C 5.0PF C
C138 CK73HB1H102K CHIP C 1000PF K
C141,142 CK73HB1H102K CHIP C 1000PF K
C145 CC73HCH1H220G CHIP C 22PF G

Address

Parts No. Description

parts

Destination

C40 CK73HB1A104K CHIP C 0.10UF K
C41 C92-0507-05 CHIP-TAN 4.7UF 6.3WV
C42 CK73HB1H102K CHIP C 1000PF K
C43 CK73HB1C103K CHIP C 0.010UF K
C44-46 CC73HCH1H101J CHIP C 100PF J

C50 CC73HCH1H220J CHIP C 22PF J
C51 CC73GCH1H220J CHIP C 22PF J
C52 CC73HCH1H100D CHIP C 10PF D
C54 CK73HB1H102K CHIP C 1000PF K
C55 CK73HB1C103K CHIP C 0.010UF K

C56 CK73HB1H102K CHIP C 1000PF K
C57 CC73HCH1H100D CHIP C 10PF D
C61 CK73HB1H102K CHIP C 1000PF K
C64 CK73HB1H102K CHIP C 1000PF K
C65 CC73HCH1H180J CHIP C 18PF J

C66 CK73GB0J105K CHIP C 1.0UF K
C67 CK73HB1H102K CHIP C 1000PF K
C68 CC73HCH1H180J CHIP C 18PF J
C69 CC73HCH1H040C CHIP C 4.0PF C
C70 CK73GB0J105K CHIP C 1.0UF K

C71 CK73HB1H102K CHIP C 1000PF K
C72 CK73GB1C104K CHIP C 0.10UF K
C73 CK73HB1H102K CHIP C 1000PF K
C74 CC73HCH1H330J CHIP C 33PF J
C75 CK73HB1H102K CHIP C 1000PF K

C76 CC73GCH1H390J CHIP C 39PF J
C78 CK73HB1H102K CHIP C 1000PF K
C82 CK73HB1H102K CHIP C 1000PF K
C83 CK73HB1C103K CHIP C 0.010UF K
C84 CK73HB1A104K CHIP C 0.10UF K

C147 CK73HB1H102K CHIP C 1000PF K
C148 CC73HCH1H220G CHIP C 22PF G
C152,153 CK73HB1H102K CHIP C 1000PF K
C158 CC73HCH1H220G CHIP C 22PF G
C159 CC73HCH1H020B CHIP C 2.0PF B

C160 CC73HCH1H270G CHIP C 27PF G
C161 CK73HB1H102K CHIP C 1000PF K
C162 ∗ CC73HCH1H470G CHIP C 47PF G
C163 CK73HB1H102K CHIP C 1000PF K
C166 CK73HB1C103K CHIP C 0.010UF K

C167,168 CK73HB1A104K CHIP C 0.10UF K
C169,170 CK73HB1A683K CHIP C 0.068UF K
C171 CK73HB1H102K CHIP C 1000PF K
C172 CK73HB1H182K CHIP C 1800PF K
C173,174 ∗ CC73HCH1H181J CHIP C 180PF J

C175 CC73HCH1H220J CHIP C 22PF J
C176 CK73HB1A104K CHIP C 0.10UF K
C177 C92-0712-05 CHIP-TAN 22UF 6.3WV
C178 CK73HB1C103K CHIP C 0.010UF K
C179 CK73HB1A104K CHIP C 0.10UF K

C180 CC73HCH1H121J CHIP C 120PF J
C182,183 CK73HB1A104K CHIP C 0.10UF K
C186 CC73HCH1H240J CHIP C 24PF J
C187 CC73HCH1H020C CHIP C 2.0PF C
C188 CC73HCH1H240J CHIP C 24PF J

C189 CK73HB1H102K CHIP C 1000PF K
C190-192 CK73HB1C103K CHIP C 0.010UF K
C193 C92-0507-05 CHIP-TAN 4.7UF 6.3WV
C194 CK73HB1A104K CHIP C 0.10UF K
C195 C92-0628-05 CHIP-TAN 10UF 10WV

C85 ∗ C93-0766-05 CERAMIC C 56PF J
C88 CC73GCH1H560J CHIP C 56PF J
C89 CK73GB1H102K CHIP C 1000PF K
C90-92 CK73HB1H102K CHIP C 1000PF K
C93 CC73HCH1H080D CHIP C 8.0PF D

C94 CK73GB1H102K CHIP C 1000PF K
C95-97 CC73GCH1H120G CHIP C 12PF G
C98 CC73GCH1H080B CHIP C 8.0PF B
C99 CC73GCH1H130G CHIP C 13PF G
C100 CC73GCH1H070B CHIP C 7.0PF B

C101 CC73GCH1H240G CHIP C 24PF G
C105-107 CK73HB1H102K CHIP C 1000PF K
C108 CC73HCH1H101J CHIP C 100PF J
C109-115 CK73HB1H102K CHIP C 1000PF K
C116 C92-0544-05 CHIP-TAN 10UF 4WV

C117,118 CK73HB1H102K CHIP C 1000PF K
C124 CK73HF1C104Z CERAMIC C 0.1UF Z
C125 CC73HCH1H1R5C CHIP C 1.5PF C
C126 CC73HCH1H100D CHIP C 10PF D
C128 CK73HB1C103K CHIP C 0.010UF K

C129 CC73HCH1H110J CHIP C 11PF J
C130 CK73HB1H102K CHIP C 1000PF K
C131-133 CK73HB1C103K CHIP C 0.010UF K
C134 CK73HB1H102K CHIP C 1000PF K
C135 CC73HCH1H120J CHIP C 12PF J

E : TH-K2E K : TH-K2AT M : TH-K2AT

18

E3 : TH-K2ET K2 : TH-K2AT M2 : TH-K2AT

C196,197 CK73HB1C682K CHIP C 6800PF K
C198 CK73EF1C105Z CHIP C 1.0UF Z
C201 CK73HB1H122K CHIP C 1200PF K
C202 CK73HB1H271K CHIP C 270PF K
C203 CC73HCH1H121J CHIP C 120PF J

C204 CK73HB1A333K CHIP C 0.033UF K
C205 CK73HB1A473K CHIP C 0.047UF K
C206 CK73HB1C153K CHIP C 0.015UF K
C207 CK73HB1C103K CHIP C 0.010UF K
C208 CC73HCH1H820J CHIP C 82PF J

C209 CK73HB1H102K CHIP C 1000PF K
C210 CK73HB1C103K CHIP C 0.010UF K
C211 CK73HB1H222K CHIP C 2200PF K
C212 CK73HB1C123K CHIP C 0.012UF K
C213 C92-0507-05 CHIP-TAN 4.7UF 6.3WV

C218 CK73HB1H102K CHIP C 1000PF K
C219 CK73HB1A473K CHIP C 0.047UF K
C220 CK73HB1E472K CHIP C 4700PF K
C221,222 CK73HB1C103K CHIP C 0.010UF K
C223 CK73HB1H102K CHIP C 1000PF K

C224 CK73HB1A104K CHIP C 0.10UF K
C225 CK73GB0J105K CHIP C 1.0UF K
C226 CK73HB1A104K CHIP C 0.10UF K
C227 C92-0587-05 CHIP-TAN 2.2UF 4WV
C228,229 CK73HB1A104K CHIP C 0.10UF K

New

Ref. No.

C230 CK73FB1C105K CHIP C 1.0UF K
C231,232 CK73HB1H102K CHIP C 1000PF K
C235,236 CK73HB1C103K CHIP C 0.010UF K
C237 C92-0628-05 CHIP-TAN 10UF 10WV
C238-241 CK73HB1H102K CHIP C 1000PF K

Address

Parts No. Description

parts

TH-K2AT/K2E/K2ET

PARTS LIST

Destination

Ref. No.

C359,360 CK73HB1A104K CHIP C 0.10UF K
C366 ∗ CC73GCH1H101G CHIP C 100PF G
C500,501 CC73HCH1H1R5B CHIP C 1.5PF B
C502 CC73HCH1H030B CHIP C 3.0PF B
C503 ∗ CC73GCH1H101G CHIP C 100PF G

Address

New

Parts No. Description

parts

TX-RX UNIT (X57-674X-XX)

Destination

C242 CK73HB1C103K CHIP C 0.010UF K
C243 CK73HB1H102K CHIP C 1000PF K
C246 C92-1327-05 CHIP-TAN 100UF 10WV
C247,248 CK73HB1A104K CHIP C 0.10UF K
C249 CK73HB1H102K CHIP C 1000PF K

C250 CK73EF1C105Z CHIP C 1.0UF Z
C252 CC73HCH1H101J CHIP C 100PF J
C253 C92-0628-05 CHIP-TAN 10UF 10WV
C255 C92-0628-05 CHIP-TAN 10UF 10WV
C256,257 CK73HB1H102K CHIP C 1000PF K

C258 CK73HB1A104K CHIP C 0.10UF K
C270,271 CK73HB1H102K CHIP C 1000PF K
C272 CK73HB1H471K CHIP C 470PF K
C276 CK73HB1H102K CHIP C 1000PF K
C279-285 CK73HB1H102K CHIP C 1000PF K

C286 CK73FB1C105K CHIP C 1.0UF K
C290,291 CK73HB1H102K CHIP C 1000PF K
C293 CC73HCH1H470J CHIP C 47PF J
C294,295 CC73HCH1H050C CHIP C 5.0PF C
C297 CK73HB1A104K CHIP C 0.10UF K

C298 CK73HB1H102K CHIP C 1000PF K
C299 CK73FB1C105K CHIP C 1.0UF K
C300 CK73HB1H102K CHIP C 1000PF K
C302 CK73HB1H102K CHIP C 1000PF K
C303 C92-0605-05 TANTALUM C150UF 6.3WV

C304-306 CK73HB1H102K CHIP C 1000PF K
C307 CK73HB1A104K CHIP C 0.10UF K
C308 CK73HB1H102K CHIP C 1000PF K
C309 CK73FB1C105K CHIP C 1.0UF K
C310 CK73EF1C105Z CHIP C 1.0UF Z

C311 CK73GB1C104K CHIP C 0.10UF K
C312,313 CK73HB1A393K CHIP C 0.039UF K
C314 CK73HB1H102K CHIP C 1000PF K
C316 CK73GB1C104K CHIP C 0.10UF K
C317,318 CK73HB1H102K CHIP C 1000PF K

C319 C92-0628-05 CHIP-TAN 10UF 10WV
C320,321 CK73HB1C822K CHIP C 8200PF K K,K2
C323-326 CK73HB1H102K CHIP C 1000PF K
C327 CK73HB1A104K CHIP C 0.10UF K
C328 CK73GB0J105K CHIP C 1.0UF K

C329 CC73FCH1H560J CHIP C 56PF J
C330,331 CK73HB1H102K CHIP C 1000PF K
C332 CK73HB1A104K CHIP C 0.10UF K
C335,336 CK73HB1A104K CHIP C 0.10UF K
C338 CK73FB1C105K CHIP C 1.0UF K

C339 CK73HB1A473K CHIP C 0.047UF K
C344-348 CK73HB1H102K CHIP C 1000PF K
C349 CK73HB1A104K CHIP C 0.10UF K M,M2,E
C349 CK73HB1A104K CHIP C 0.10UF K E3
C349,350 CK73HB1A104K CHIP C 0.10UF K K,K2

C351 CK73HB1C103K CHIP C 0.010UF K
C352-354 CK73HB1H102K CHIP C 1000PF K
C355,356 CK73HB1C103K CHIP C 0.010UF K
C357 CK73EF1C105Z CHIP C 1.0UF Z
C358 CK73HB1A473K CHIP C 0.047UF K

E : TH-K2E K : TH-K2AT M : TH-K2AT
E3 : TH-K2ET K2 : TH-K2AT M2 : TH-K2AT

C504 CC73HCH1H020B CHIP C 2.0PF B
C505 CK73HB1A473K CHIP C 0.047UF K
C506 CK73HB1H102K CHIP C 1000PF K
C510 CC73HCH1H101J CHIP C 100PF J E,E3
C511,512 CK73HB1H471K CHIP C 470PF K E,E3

C514 CK73GB1H471K CHIP C 470PF K E,E3
C515-517 CK73HB1H471K CHIP C 470PF K E,E3

CN1 E40-5915-05 FLAT CABLE CONNECTOR
CN2 E40-5929-05 PIN ASSY
CN6 ∗ E40-6327-05 PIN ASSY
CN7 E40-5630-05 PIN ASSY SOCKET
CN8 ∗ E40-6308-05 PIN ASSY

CN9 ∗ E40-6309-05 PIN ASSY SOCKET
CN15 E23-1081-05 TERMINAL
CN17 E23-1081-05 TERMINAL E,E3
J2 E03-0190-05 DC JACK
J3 ∗ E11-0484-05 3.5D PHONE JACK(3.5D)

J4 ∗ E11-0483-05 2.5D PHONE JACK(2.5D)

CN10 ∗ F01-1032-05 RADIATION PLATE
F1 ∗ F53-0286-05 FUSE(2.5A/32V)
F3 ∗ F53-0287-05 FUSE(0.5A/32V)

CD1 L79-1474-05 TUNING COIL
CF1 L72-0968-05 CERAMIC FILTER
L1 L40-1001-86 SMALL FIXED INDUCTOR(10UH)
L2 L41-4778-14 SMALL FIXED INDUCTOR
L3 L41-8278-14 SMALL FIXED INDUCTOR

L5,6 L40-1001-86 SMALL FIXED INDUCTOR(10UH)
L8 ∗ L40-1285-71 SMALL FIXED INDUCTOR(120NH)
L9-11 ∗ L40-8275-71 SMALL FIXED INDUCTOR(82NH)
L12 L40-1075-71 SMALL FIXED INDUCTOR(10NH)
L13 L92-0149-05 FERRITE CHIP

L14 ∗ L41-4778-14 SMALL FIXED INDUCTOR
L15 L41-6868-14 SMALL FIXED INDUCTOR
L16 L34-4577-05 AIR-CORE COIL
L17 L34-4606-05 AIR-CORE COIL
L18 ∗ L41-2285-14 SMALL FIXED INDUCTOR

L19 L34-4569-05 AIR-CORE COIL
L20 L34-4567-05 AIR-CORE COIL
L21-23 L34-4569-05 AIR-CORE COIL
L26 ∗ L41-4785-14 SMALL FIXED INDUCTOR
L27 ∗ L41-6885-14 SMALL FIXED INDUCTOR

L28 L40-2775-71 SMALL FIXED INDUCTOR(27NH)
L29 L40-2275-71 SMALL FIXED INDUCTOR(22NH)
L32 L41-8278-14 SMALL FIXED INDUCTOR
L35 L41-8278-14 SMALL FIXED INDUCTOR
L38 L41-8278-14 SMALL FIXED INDUCTOR

L40 L41-6878-14 SMALL FIXED INDUCTOR
L41 L41-1878-14 SMALL FIXED INDUCTOR
L45,46 ∗ L41-5685-14 SMALL FIXED INDUCTOR
L49 L92-0131-05 FERRITE CHIP
L50 L92-0137-05 FERRITE CHIP

L53 L40-1575-71 SMALL FIXED INDUCTOR(15NH)
L54 ∗ L40-5675-71 SMALL FIXED INDUCTOR(56NH)

19

TH-K2AT/K2E/K2ET

PARTS LIST

TX-RX UNIT (X57-674X-XX)

New

Ref. No.

L55 L41-1078-14 SMALL FIXED INDUCTOR
L56 ∗ L41-2278-14 SMALL FIXED INDUCTOR
L58 ∗ L41-8285-14 SMALL FIXED INDUCTOR
L63 L92-0140-05 FERRITE CHIP
L64 L40-4795-85 SMALL FIXED INDUCTOR(4.7UH)

Address

Parts No. Description

parts

Destination

New

Ref. No.

R70-72 RK73EB2ER39K CHIP R 0.39 K 1/4W
R74,75 RK73HH1J104D RESISTOR 100K D 1/16W
R76-79 RK73HH1J154D RESISTOR 150K D 1/16W
R80 RK73HB1J103J CHIP R 10K J 1/16W
R81 RK73HB1J394J CHIP R 390K J 1/16W

Address

Parts No. Description

parts

Destination

L66 ∗ L40-1285-71 SMALL FIXED INDUCTOR(120NH)
L68 L92-0161-05 BEADS CORE
X1 ∗ L77-1931-05 TCXO(12.8MHZ)
X3 ∗ L77-1940-05 CRYSTAL RESONATOR(7.982MHZ)
XF1 ∗ L71-0619-05 MCF(38.85MHZ)

CP1 ∗ RK75HA1J272J CHIP-COM 2.7K J 1/16W
CP2 RK75GB1J392J CHIP-COM 3.9K J 1/16W
CP31 RK75GB1J392J CHIP-COM 3.9K J 1/16W
CP32-35 RK75HA1J102J CHIP-COM 1.0K J 1/16W
R4 RK73HB1J102J CHIP R 1.0K J 1/16W

R5 RK73HB1J104J CHIP R 100K J 1/16W
R6 RK73HB1J102J CHIP R 1.0K J 1/16W
R7 RK73HB1J473J CHIP R 47K J 1/16W
R8 RK73HB1J104J CHIP R 100K J 1/16W
R9 RK73HB1J271J CHIP R 270 J 1/16W

R10 RK73HB1J470J CHIP R 47 J 1/16W
R11 RK73HB1J154J CHIP R 150K J 1/16W
R12 RK73HB1J470J CHIP R 47 J 1/16W
R13 RK73HB1J682J CHIP R 6.8K J 1/16W
R14 RK73HB1J332J CHIP R 3.3K J 1/16W

R15 RK73HB1J562J CHIP R 5.6K J 1/16W
R16 RK73HB1J471J CHIP R 470 J 1/16W
R17 RK73HB1J332J CHIP R 3.3K J 1/16W
R18 RK73HB1J100J CHIP R 10 J 1/16W
R19 RK73HB1J124J CHIP R 120K J 1/16W

R20 RK73HB1J102J CHIP R 1.0K J 1/16W
R21 RK73HB1J472J CHIP R 4.7K J 1/16W
R22 RK73HB1J822J CHIP R 8.2K J 1/16W
R24 RK73HB1J471J CHIP R 470 J 1/16W
R30 RK73HB1J122J CHIP R 1.2K J 1/16W

R82 RK73HB1J273J CHIP R 27K J 1/16W
R83 RK73HB1J563J CHIP R 56K J 1/16W
R84 RK73HB1J104J CHIP R 100K J 1/16W
R85 RK73GB1J561J CHIP R 560 J 1/16W
R86 RK73HB1J562J CHIP R 5.6K J 1/16W

R88 RK73HB1J331J CHIP R 330 J 1/16W
R90 RK73HB1J331J CHIP R 330 J 1/16W
R91 RK73HB1J102J CHIP R 1.0K J 1/16W
R92 RK73HB1J332J CHIP R 3.3K J 1/16W
R93 RK73HB1J470J CHIP R 47 J 1/16W

R94 RK73HB1J331J CHIP R 330 J 1/16W
R95 RK73HB1J104J CHIP R 100K J 1/16W
R96-98 RK73HB1J823J CHIP R 82K J 1/16W
R99,100 RK73HB1J105J CHIP R 1.0M J 1/16W
R101 RK73HB1J470J CHIP R 47 J 1/16W

R102 R92-1368-05 CHIP R 0 OHM
R103 RK73HB1J272J CHIP R 2.7K J 1/16W
R104 RK73HB1J560J CHIP R 56 J 1/16W
R110,111 RK73HB1J105J CHIP R 1.0M J 1/16W
R115 RK73HB1J562J CHIP R 5.6K J 1/16W

R116 RK73HB1J124J CHIP R 120K J 1/16W
R117 RK73HH1J272D RESISTOR 2.7K D 1/16W
R118 RK73HB1J273J CHIP R 27K J 1/16W
R119 RK73HB1J182J CHIP R 1.8K J 1/16W
R120 RK73HB1J272J CHIP R 2.7K J 1/16W

R122 RK73HB1J272J CHIP R 2.7K J 1/16W
R123 RK73HB1J182J CHIP R 1.8K J 1/16W
R124 RK73HB1J332J CHIP R 3.3K J 1/16W
R125 RK73HB1J561J CHIP R 560 J 1/16W
R126 RK73HB1J273J CHIP R 27K J 1/16W

R31 RK73HB1J222J CHIP R 2.2K J 1/16W
R32 RK73HB1J102J CHIP R 1.0K J 1/16W
R33 RK73HB1J220J CHIP R 22 J 1/16W
R34 RK73HB1J332J CHIP R 3.3K J 1/16W
R35 RK73HB1J124J CHIP R 120K J 1/16W

R36 RK73HB1J100J CHIP R 10 J 1/16W
R37,38 RK73HB1J563J CHIP R 56K J 1/16W
R39 RK73HB1J271J CHIP R 270 J 1/16W
R41 RK73HB1J271J CHIP R 270 J 1/16W
R42 RK73HB1J101J CHIP R 100 J 1/16W

R45 RK73HB1J332J CHIP R 3.3K J 1/16W
R46 RK73HB1J103J CHIP R 10K J 1/16W
R47 RK73HB1J562J CHIP R 5.6K J 1/16W
R49 RK73HB1J331J CHIP R 330 J 1/16W
R50 RK73HB1J330J CHIP R 33 J 1/16W

R51 RK73HB1J471J CHIP R 470 J 1/16W
R52 RK73HB1J102J CHIP R 1.0K J 1/16W
R53,54 RK73HB1J101J CHIP R 100 J 1/16W
R55 RK73HB1J471J CHIP R 470 J 1/16W
R56 RK73HB1J102J CHIP R 1.0K J 1/16W

R58 RK73HB1J100J CHIP R 10 J 1/16W
R59 RK73HB1J123J CHIP R 12K J 1/16W
R60 RK73HB1J563J CHIP R 56K J 1/16W
R61,62 RK73HB1J221J CHIP R 220 J 1/16W
R64 R92-1368-05 CHIP R 0 OHM

E : TH-K2E K : TH-K2AT M : TH-K2AT

20

E3 : TH-K2ET K2 : TH-K2AT M2 : TH-K2AT

R127 RK73HB1J470J CHIP R 47 J 1/16W
R128 RK73HB1J332J CHIP R 3.3K J 1/16W
R130 RK73HB1J101J CHIP R 100 J 1/16W
R131 RK73HB1J334J CHIP R 330K J 1/16W
R132 RK73HB1J222J CHIP R 2.2K J 1/16W

R133 RK73HB1J102J CHIP R 1.0K J 1/16W
R134 RK73HB1J394J CHIP R 390K J 1/16W
R135 RK73HB1J474J CHIP R 470K J 1/16W
R137 RK73HB1J472J CHIP R 4.7K J 1/16W
R140 RK73HB1J184J CHIP R 180K J 1/16W

R141 RK73HB1J183J CHIP R 18K J 1/16W
R142 RK73HB1J472J CHIP R 4.7K J 1/16W
R143 RK73HB1J471J CHIP R 470 J 1/16W
R144 R92-1368-05 CHIP R 0 OHM
R145 RK73HB1J472J CHIP R 4.7K J 1/16W

R146 RK73HB1J183J CHIP R 18K J 1/16W
R147 RK73HB1J471J CHIP R 470 J 1/16W
R148 RK73HB1J154J CHIP R 150K J 1/16W
R149 RK73HB1J473J CHIP R 47K J 1/16W
R151 RK73HB1J681J CHIP R 680 J 1/16W

R152 RK73HB1J154J CHIP R 150K J 1/16W
R153 RK73HB1J102J CHIP R 1.0K J 1/16W
R155,156 RK73HB1J104J CHIP R 100K J 1/16W
R157,158 RK73HB1J334J CHIP R 330K J 1/16W
R159 RK73HB1J124J CHIP R 120K J 1/16W

PARTS LIST

New

Ref. No.

R160 RK73HB1J472J CHIP R 4.7K J 1/16W
R161 RK73HB1J102J CHIP R 1.0K J 1/16W
R162 RK73HB1J184J CHIP R 180K J 1/16W
R163 RK73HB1J564J CHIP R 560K J 1/16W
R164 RK73HH1J103D CHIP R 10K D 1/16W

Address

Parts No. Description

parts

Destination

TH-K2AT/K2E/K2ET

TX-RX UNIT (X57-674X-XX)

New

Ref. No.

R231 RK73HB1J151J CHIP R 150 J 1/16W
R235,236 RK73HB1J102J CHIP R 1.0K J 1/16W
R237 RK73HB1J104J CHIP R 100K J 1/16W
R238,239 RK73HB1J102J CHIP R 1.0K J 1/16W
R240 RK73HB1J104J CHIP R 100K J 1/16W

Address

Parts No. Description

parts

Destination

R165,166 RK73HB1J824J CHIP R 820K J 1/16W
R167,168 RK73HB1J184J CHIP R 180K J 1/16W
R169 RK73GH1J104D CHIP R 100K D 1/16W
R170 RK73HH1J473D RESISTOR 47K D 1/16W
R171 ∗ RK73HH1J563D RESISTOR 56K D 1/16W

R172 RK73HB1J103J CHIP R 10K J 1/16W
R173 RK73HB1J153J CHIP R 15K J 1/16W
R174 RK73HB1J564J CHIP R 560K J 1/16W
R175 RK73HB1J222J CHIP R 2.2K J 1/16W
R176 RK73HB1J824J CHIP R 820K J 1/16W

R177 RK73HB1J103J CHIP R 10K J 1/16W
R178 R92-1368-05 CHIP R 0 OHM
R179 RK73HB1J224J CHIP R 220K J 1/16W
R180 RK73HB1J393J CHIP R 39K J 1/16W
R181 RK73HB1J471J CHIP R 470 J 1/16W

R182 RK73HB1J102J CHIP R 1.0K J 1/16W
R183 RK73HB1J333J CHIP R 33K J 1/16W
R185 RK73HB1J274J CHIP R 270K J 1/16W
R186 RK73GB1J683J CHIP R 68K J 1/16W
R188 RK73HB1J470J CHIP R 47 J 1/16W

R189 R92-1368-05 CHIP R 0 OHM
R190,191 RK73HB1J473J CHIP R 47K J 1/16W
R192 RK73HB1J471J CHIP R 470 J 1/16W
R193 RK73HB1J182J CHIP R 1.8K J 1/16W
R194 RK73HB1J103J CHIP R 10K J 1/16W

R195 RK73HB1J101J CHIP R 100 J 1/16W
R196 RK73HB1J103J CHIP R 10K J 1/16W
R197 RK73HB1J101J CHIP R 100 J 1/16W
R198 RK73HB1J103J CHIP R 10K J 1/16W
R199 RK73HB1J102J CHIP R 1.0K J 1/16W

R241-243 RK73HB1J334J CHIP R 330K J 1/16W
R244 R92-1252-05 CHIP R 0 OHM J 1/16W
R246 RK73HB1J392J CHIP R 3.9K J 1/16W
R248 RK73HB1J392J CHIP R 3.9K J 1/16W
R252 RK73HB1J104J CHIP R 100K J 1/16W

R253,254 RK73HB1J102J CHIP R 1.0K J 1/16W
R255 R92-1368-05 CHIP R 0 OHM
R256 RK73HB1J102J CHIP R 1.0K J 1/16W
R257 RK73HB1J563J CHIP R 56K J 1/16W K,K2
R258 RK73HB1J681J CHIP R 680 J 1/16W K,K2

R258,259 R92-1368-05 CHIP R 0 OHM M,M2,E
R258,259 R92-1368-05 CHIP R 0 OHM E3
R259 RK73HB1J684J CHIP R 680K J 1/16W K,K2
R260 RK73HB1J473J CHIP R 47K J 1/16W M,M2,E
R260 RK73HB1J473J CHIP R 47K J 1/16W E3

R260,261 RK73HB1J473J CHIP R 47K J 1/16W K,K2
R263 RK73HB1J103J CHIP R 10K J 1/16W
R264 R92-1368-05 CHIP R 0 OHM M,M2,E
R264 R92-1368-05 CHIP R 0 OHM E3
R271 RK73HB1J120J CHIP R 12 J 1/16W

R272 RK73HB1J472J CHIP R 4.7K J 1/16W
R273 RK73HB1J102J CHIP R 1.0K J 1/16W
R275-277 RK73HB1J473J CHIP R 47K J 1/16W
R282,283 R92-1368-05 CHIP R 0 OHM
R285,286 R92-1368-05 CHIP R 0 OHM

R290,291 R92-1368-05 CHIP R 0 OHM
R310 RK73HB1J392J CHIP R 3.9K J 1/16W
R312 RK73HB1J472J CHIP R 4.7K J 1/16W
R313 RK73HB1J332J CHIP R 3.3K J 1/16W
R318 RK73HB1J102J CHIP R 1.0K J 1/16W

R200 RK73HB1J103J CHIP R 10K J 1/16W
R201 RK73HB1J472J CHIP R 4.7K J 1/16W
R202 RK73HB1J473J CHIP R 47K J 1/16W
R203 RK73HB1J474J CHIP R 470K J 1/16W
R204 RK73HB1J184J CHIP R 180K J 1/16W

R205 RK73HB1J101J CHIP R 100 J 1/16W
R206 RK73HB1J150J CHIP R 15 J 1/16W
R207 RK73HB1J102J CHIP R 1.0K J 1/16W
R208 RK73HB1J100J CHIP R 10 J 1/16W
R209 RK73HB1J104J CHIP R 100K J 1/16W

R210 RK73FB2A120J CHIP R 12 J 1/10W
R211 RK73HB1J474J CHIP R 470K J 1/16W
R212 RK73HB1J103J CHIP R 10K J 1/16W
R213 RK73HB1J223J CHIP R 22K J 1/16W
R214 RK73HB1J103J CHIP R 10K J 1/16W

R215 RK73HB1J474J CHIP R 470K J 1/16W
R216 RK73HB1J103J CHIP R 10K J 1/16W
R217 RK73HB1J821J CHIP R 820 J 1/16W
R218 R92-1368-05 CHIP R 0 OHM
R223 RK73HB1J224J CHIP R 220K J 1/16W

R224 RK73HB1J183J CHIP R 18K J 1/16W
R226 RK73HB1J221J CHIP R 220 J 1/16W
R227 RK73HB1J101J CHIP R 100 J 1/16W
R230 RK73HB1J221J CHIP R 220 J 1/16W K,K2,M
R230 RK73HB1J221J CHIP R 220 J 1/16W M2,E3

E : TH-K2E K : TH-K2AT M : TH-K2AT
E3 : TH-K2ET K2 : TH-K2AT M2 : TH-K2AT

R323 RK73HB1J472J CHIP R 4.7K J 1/16W
R324,325 RK73HB1J473J CHIP R 47K J 1/16W
R326 R92-1368-05 CHIP R 0 OHM
R328 RK73HB1J474J CHIP R 470K J 1/16W
R330 RK73HB1J471J CHIP R 470 J 1/16W

R332 RK73FB2A150J CHIP R 15 J 1/10W
R335 RK73HB1J102J CHIP R 1.0K J 1/16W
R336 RK73HB1J221J CHIP R 220 J 1/16W
R337 RK73HB1J471J CHIP R 470 J 1/16W
R341 R92-1368-05 CHIP R 0 OHM

R342,343 R92-1252-05 CHIP R 0 OHM J 1/16W
R344 RK73HB1J104J CHIP R 100K J 1/16W K,K2
R345 R92-1252-05 CHIP R 0 OHM J 1/16W
R346 RK73HB1J680J CHIP R 68 J 1/16W
R347 RK73HB1J101J CHIP R 100 J 1/16W

R348 RK73HB1J221J CHIP R 220 J 1/16W
R349 R92-1368-05 CHIP R 0 OHM
R351 RK73HB1J221J CHIP R 220 J 1/16W
R353 RK73HB1J333J CHIP R 33K J 1/16W
R354 R92-1368-05 CHIP R 0 OHM

VR1 ∗ R32-0686-05 SEMI FIXED VARIABLE RESISTOR(500K)
VR5 R32-0668-05 SEMI FIXED VARIABLE RESISTOR(50K)
VR6 R32-0658-05 SEMI FIXED VARIABLE RESISTOR(100K)

S7 ∗ S70-0485-05 TACT SWITCH (PTT)

21

TH-K2AT/K2E/K2ET

PARTS LIST

TX-RX UNIT (X57-674X-XX)

New

Ref. No.

MIC1 T91-0580-05 MIC ELEMENT

D1,2 1SV325 VARIABLE CAPACITANCE DIODE
D5 HSC277 DIODE
D6 1SV305 VARIABLE CAPACITANCE DIODE
D7 MA2S111 DIODE
D8,9 HSC277 DIODE

D10 XB15A709 DIODE
D12,13 HVC131 DIODE
D14 MA2S111 DIODE
D15 MA8039 ZENER DIODE
D16 MA2S111 DIODE

D17 HSM88AS DIODE
D18-21 1SV305 VARIABLE CAPACITANCE DIODE
D22 1SS361 DIODE
D24 MA742 DIODE
D25 MA2S111 DIODE

D26 1SS388 DIODE
D27 RB706F-40 DIODE
D30 RB521S-30 DIODE
D31 DA221 DIODE
D32,33 RB051L-40 DIODE

D34 ∗ MAZS0270H ZENER DIODE
D35,36 RB521S-30 DIODE
D60 MA2S111 DIODE E
D62 MA2S111 DIODE E,E3
D62-65 MA2S111 DIODE K,K2

D63-65 MA2S111 DIODE M,M2
D64,65 MA2S111 DIODE E,E3
D69-73 MA2S111 DIODE
D74 DA221 DIODE
D79 DA221 DIODE

Address

Parts No. Description

parts

Destination

New

Ref. No.

Q17 2SK1215(E) FET
Q20 2SK1830 FET
Q21 2SC4617(R) TRANSISTOR
Q22 ∗ RN2105 TRANSISTOR
Q23 KTC4082 TRANSISTOR

Q24 ∗ 2SC5488 TRANSISTOR
Q27 2SK1830 FET
Q29 2SC4919 TRANSISTOR
Q30 2SC4617(R) TRANSISTOR
Q31 2SK1830 FET

Q33 2SB1184(Q,R) TRANSISTOR
Q34,35 2SK1830 FET
Q36 2SJ347 FET
Q37 2SB1184(Q,R) TRANSISTOR
Q38 2SC4617(R) TRANSISTOR

Q41 ∗ RN2105 TRANSISTOR
Q47 RN1701 TRANSISTOR
Q50 2SK1830 FET
Q51 ∗ RN4902 TRANSISTOR
Q52 ∗ RN1107 TRANSISTOR

Q53 RN2701 TRANSISTOR
Q55 ∗ CPH3317 FET
Q56 ∗ CPH3417 FET
Q57 ∗ RN2105 TRANSISTOR
Q58 2SK1830 FET M,M2,E

Q58 2SK1830 FET E3
Q58,59 2SK1830 FET K,K2
TH1 ∗ B57331V2103J THERMISTOR
TH3,4 B57331V2104J THERMISTOR

Address

Parts No. Description

parts

Destination

D80 RB521S-30 DIODE
IC1 LMX2316TMX MOS IC
IC2 NJM2904V MOS IC
IC3 TA31136FN MOS IC
IC4 ∗ XC6202PB52FR MOS IC

IC5 NJM2107F MOS IC
IC6 TA7368F MOS IC
IC8 ∗ 90522BPFFG139 MPU
IC9 ∗ TK11250CM MOS IC
IC10 ∗ S-80844CNNBB85 MOS IC

IC11 ∗ S-80930CNNBG80 MOS IC
IC12 ∗ TK11250CUCB MOS IC
IC15 AT25160N10SI27 ROM IC
IC16 NJM2904V MOS IC
IC17 NJM2902V MOS IC

Q1 2SC5066(O) TRANSISTOR
Q2 ∗ 2SC5488 TRANSISTOR
Q3 2SK1830 FET
Q4 2SC4617(R) TRANSISTOR
Q5,6 ∗ 2SC5488 TRANSISTOR

Q9 ∗ 2SC5488 TRANSISTOR
Q10 2SC4926YD TRANSISTOR
Q11 2SK2596 FET
Q12 2SK3476 FET
Q13 2SK1830 FET

Q14 ∗ RN4902 TRANSISTOR
Q15 2SC4617(R) TRANSISTOR
Q16 3SK318 FET

E : TH-K2E K : TH-K2AT M : TH-K2AT

22

E3 : TH-K2ET K2 : TH-K2AT M2 : TH-K2AT

TH-K2AT/K2E/K2ET

EXPLODED VIEW (TH-K2AT / K2ET)

A

7

3

1

40

31

Dx2

Ex2

D

D

D

Gx2

D

D

E

D

17

16

Dx2

18

36

TX-RX Unit (B/3)

37

D

TX-RX Unit (C/3)

C

6

19

D

B

35

34

B

29

10

8

9

15

23

2

Fx2

3

1 (K2, M2)

701. STICKER

TX-RX Unit (A/3)

28

14

22

45

39

13

21

4

702. STANDARD LABEL : K, K2

12

33

Ax2

E

E

5

A:N09-1492-05
B:N14-0569-04
C:N14-0573-04
D:N79-2035-46
E:N79-2040-45
F:N82-2007-46
G:N09-2433-05

Parts with the exploded numbers larger than 700 are not supplied.

23

TH-K2AT/K2E/K2ET

EXPLODED VIEW (TH-K2E)

C

7

2

1

40

38

TX-RX Unit (B/3)

37

D

TX-RX Unit (C/3)

31

Dx2

Ex2

D

16

D

D

17

Dx2

18

Gx2

D

D

E

D

C

6

19

D

D

35

34

B

29

10

8

9

15

23

2

Fx2

3

701. STICKER

TX-RX Unit (A/3)

28

14

22

45

39

13

21

4

12

33

Ax2

E

E

5

A:N09-1492-05
B:N14-0569-04
C:N14-0573-04
D:N79-2035-46
E:N79-2040-45
F:N82-2007-46
G:N09-2433-05

24

Parts with the exploded numbers larger than 700 are not supplied.

TH-K2AT/K2E/K2ET

PACKING (K, M, E and E3 types)

1

11.INSTRUCTION MANUAL
(B62-1696-00)
(B62-1697-00):K,E,E3
(B62-1699-00):E,E3
(B62-1702-00):E,E3
(B62-1757-00):E,E3
(B62-1758-00):E,E3

43.CHARGER (120V/13.8V)
(W08-0960-15) : K

E

703. PAMPHLET (R & TTE) : E, E3

704. PAMPHLET

705. WARRANTY CARD : K, E, E3

42.CHARGER (230V/13.8V)
(W08-0959-15) : M, E, E3

F

41.HELICAL ANTENNA
(T90-1018-25)

2

44.BATTERY ASSY
(7.2V/1100mAh)
(W09-0991-05)

30.BELT HOOK ASSY
(J29-0709-04)

32.HANDSTRAP
(J69-0342-05)
: M, E, E3

24.ITEM CARTON CASE

(H52-1960-02):K,M

3

(H52-1961-02):E
(H52-1962-02):E3

26.PACKING FIXTURE
(H12-3146-01)

706.UK PLUG ATTACHMENT
: E, E3

Parts with the exploded numbers larger than 700 are not supplied.

25

TH-K2AT/K2E/K2ET

PACKING (K2 and M2 types)

G

11.INSTRUCTION MANUAL
(B62-1695-00):M2

1

704. PAMPHLET

(B62-1696-00)
(B62-1697-00):K2

705. WARRANTY CARD : K2

H

2

32.HANDSTRAP
(J69-0342-05) : M2

30.BELT HOOK ASSY
(J29-0709-04)

3

1.CABINET ASSY
(BATTERY CASE)
(A02-3817-02)

41.HELICAL ANTENNA
(T90-1018-25)

25.ITEM CARTON CASE
(H52-2009-02)

27.PACKING FIXTURE
(H12-3147-03)

26

Parts with the exploded numbers larger than 700 are not supplied.

TH-K2AT/K2E/K2ET

ADJUSTMENT

Single Tone Mode

This mode is used to check the DTMF deviation.

Operation

■ 16key (K, K2, M, M2 and E3 types)

1. Press the [PTT] key on the transceiver to switch to the
transmission mode.

2. Press the [MONI] key to enter the single tone mode.

3. Press any key from [1] to [8] keys to transmit a single tone.
The single tone is consisting of eight frequencies.

[1] 697Hz
[2] 770Hz
[3] 852Hz
[4] 941Hz
[5] 1209Hz
[6] 1336Hz
[7] 1477Hz
[8] 1633Hz

4. When the [MONI] key is pressed again during the
transmission, the transceiver switches to the reception
mode, the single tone mode turns OFF.

■ 4key (E type)

1. Press the [PTT] key on the transceiver to switch to the
transmission mode.

2. Press the [MONI] key to enter the single tone mode.

3. When the [VFO] key is pressed during the transmission, a
DTMF “D” dual tone (combination of 1633 Hz and 941 Hz
frequencies) is transmitted.

4. When the [MR] key is pressed during the transmission,
single-tone 1633 Hz is transmitted.

5. When the [MONI] key is pressed again during the
transmission, the transceiver switch to the reception mode,
the single tone mode is turned OFF.

G. 7.5V TX M power (Lower limit frequency, center frequency,

upper limit frequency)

H. 7.5V TX L power (Lower limit frequency, center frequency,

upper limit frequency)

I. 13.8V TX H power (Lower limit frequency, center frequency,

upper limit frequency)

J. 13.8V TX M power (Lower limit frequency, center frequency,

upper limit frequency)

K. 13.8V TX L power (Lower limit frequency, center frequency,

upper limit frequency)
L. DCS modulation balance
M.Tone deviation (Lower limit frequency, center frequency,

upper limit frequency)
N. DCS deviation (Lower limit frequency, center frequency,

upper limit frequency)
O.VOX sensitivity (Level 1, level 9)

■ Operation in Adjustment Mode

1. Turn the transceiver ON.

2. Set the tone frequency to 151.4 Hz and the DCS code to

023 in Menu Mode to adjust tone and DCS modulation.

3. Set Adjustment Mode by shorting two lands (SET) on the

component side of the TX-RX unit (A/3).

Short these two lands

SET

• The single tone mode can be enabled only during the
transmission.

• When DTMF memory is transmitted in the single tone
mode, the single tone mode turns OFF.

Adjustment Mode

This mode is used to replace or readjust the IC15 (EEPROM).
Adjust the following adjustment items after setting the

transceiver to “Adjustment Mode”.

■ Adjustment Items

A. Overvoltage warning reference voltage (14.8V [DC IN])
B. Battery terminal reference voltage (7.5 V [Battery terminal])
C. Squelch (SQL1, SQL2)
D. S-meter (Two segments in S-meter light, all segments in S-

meter light)

E. RX BPF (Lower limit frequency, center frequency, upper

limit frequency)

F. 7.5V TX H power (Lower limit frequency, center frequency,

upper limit frequency)

4. When the Adjustment Mode is set, the “Overvoltage
warning reference voltage (14.8V [DC IN])” adjustment item
is displayed. (The “
blinks while the transceiver is in the Adjustment Mode.)
The current adjustment value is displayed at the lower digits
of the frequency display, and the value stored in the
EEPROM is displayed on the memory channel number
display.

Blink

Adjustment item

5. The functions of transceiver keys in Adjustment Mode are
as follows:

” icon on the upper side of the LCD

The value stored in the
EEPROM. (00-FE)

Current adjustment
value (00-FE)

27

TH-K2AT/K2E/K2ET

ADJUSTMENT

Key name

PTT
LAMP

MONI

MENU
F
VFO

MR

CALL

Encoder

Transmit while this key is held down.
Changes adjustment items. (Forward)
When this key is pressed on the frequency display, it switches to the adjustment display.
Changes adjustment items. (Back)
When this key is pressed on the frequency display, it switches to the adjustment display.
Write adjustment values (adjustment display)
Sound error tone (frequency display)
Function mode/MHz mode ON
VFO mode
When this key is pressed on the adjustment display, it switches to the frequency display.
Memory mode
When this key is pressed on the adjustment display, it switches to the frequency display.
Switch between frequency display and adjustment display.
Each time this key is pressed, the LCD switches between the frequency display and
adjustment display.
Increase or decrease adjustment values (00 - FE). (adjustment display)
Increase or decrease frequency and memory channel number. (frequency display)

[key]

6. To exit the Adjustment Mode, turn the transceiver OFF.

Note:

• When you press [LAMP] or [MONI] key, ensure the bosses
of rubber keys align with the LAMP and MONI contacts of
the PTT PCB (C/3).

• In the Adjustment Mode, Transmission and Reception
frequencies becomes extensive.

A. Overvoltage warning reference voltage (14.8V [DC IN])

(1)Press the [LAMP] or [MONI] key on the transceiver to display

“DC” on the LCD.
The current voltage value is displayed at the lower digits of
the frequency display, and the value stored in the EEPROM
is displayed on the memory channel number display.

[F] key → [key]

Selecting a TX power (High/Mid/Low)
Lamp always ON

Squelch level setting mode

­Function mode/MHz mode OFF
M→V (Memory shift)

M.IN (Memory registration)

-

Increase or decrease frequency (1MHz
step). (frequency display)

(2)Press the [PTT] key to enable the transmit mode.
(3)Adjust the output voltage from DC power supply until the

voltage at the battery terminal becomes 7.5V while the
transceiver is transmitting.

(4)Press the [MENU] key to write the current voltage value

into the EEPROM.

C. Squelch (SQL1, SQL2)

1Squelch (SQL1)
(1)Press the [LAMP] or [MONI] key on the transceiver to display

“SQ1” on the LCD.
The detected DC voltage value to the current noise level is
displayed at the lower digits of the frequency display, and
the value stored in the EEPROM is displayed on the memory
channel number display.

(2)Press the [MENU] key to write the current voltage value

into the EEPROM.

B.Battery terminal reference voltage (7.5 V [Battery

terminal])

(1)Press the [LAMP] or [MONI] key on the transceiver to display

“BAT” on the LCD.
Press the [F] key and then the [PTT] key repeatedly to turn
the “

” icon ON. The current voltage value is displayed at
the lower digits of the frequency display, and the value
stored in the EEPROM is displayed on the memory channel
number display.

28

(2)Press the [MENU] key to write the current noise level value

into the EEPROM.

2Squelch (SQL2)
(1)Press the [LAMP] or [MONI] key on the transceiver to display

“SQ2” on the LCD.

(2)Press the [MENU] key to write the current noise level value

into the EEPROM.

TH-K2AT/K2E/K2ET

ADJUSTMENT

D. S-meter (Two segments in S-meter light, all segments

in S-meter light)

1S-meter (Two segments in S-meter light)
(1)Press the [LAMP] or [MONI] key on the transceiver to display

“S1” on the LCD.
The current RSSI level value is displayed at the lower digits
of the frequency display, and the value stored in the
EEPROM is displayed on the memory channel number
display.

(2)Press the [MENU] key to write the current RSSI level value

into the EEPROM.

2S-meter (All segments in S-meter light)
(1)Press the [LAMP] or [MONI] key on the transceiver to display

“S9” on the LCD.

(2)Press the [MENU] key to write the current RSSI level value

into the EEPROM.

E. RX BPF (Lower limit frequency, center frequency, upper

limit frequency)

1RX BPF (Lower limit frequency)
(1)Press the [LAMP] or [MONI] key on the transceiver to display

“BPL” on the LCD.
The current BPF tuning value is displayed at the lower digits
of the frequency display, and the value stored in the
EEPROM is displayed on the memory channel number
display.

2RX BPF (Center frequency)
(1)Press the [LAMP] or [MONI] key on the transceiver to display

“BPC” on the LCD.

(2)Press the [VFO], [MR] or [CALL] key to switch to the

frequency display.

(3)Turn the encoder to display the center frequency on the

LCD.

(4)Repeat steps (4) to (6) of “1RX BPF (Lower limit

frequency)” described on page 29.

3RX BPF (Upper limit frequency)
(1)Press the [LAMP] or [MONI] key on the transceiver to display

“BPH” on the LCD.

(2)Press the [VFO], [MR] or [CALL] key to switch to the

frequency display.

(3)Turn the encoder to display the upper frequency on the

LCD.

(4)Repeat steps (4) to (6) of “1RX BPF (Lower limit

frequency)” described on page 29.

F. 7.5V TX H power (Lower limit frequency, center

frequency, upper limit frequency)

17.5V TX H power (Lower limit frequency)
(1)Press the [LAMP] or [MONI] key on the transceiver to display

“P7L” on the LCD.
In this case, the “
The current APC value is displayed at the lower digits of
the frequency display, and the value stored in the EEPROM
is displayed on the memory channel number display.

” icon appears.

(2)Press the [VFO], [MR] or [CALL] key to switch to the

frequency display.

(3)Turn the encoder to display the lower limit frequency on

the LCD.
(4)Press the [CALL] key to switch to the adjustment display.
(5)Turn the encoder to change the current BPF tuning value

and adjust RX BPF.
(6)Press the [MENU] key to write the current BPF tuning value

into the EEPROM.

(2)Press the [VFO], [MR] or [CALL] key to switch to the

frequency display.

(3)Turn the encoder to display the lower limit frequency on

the LCD.
(4)Press the [CALL] key to switch to the adjustment display.
(5)Press the [PTT] key to enable the transmit mode.
(6)Adjust the output voltage from DC power supply until the

voltage at the battery terminal becomes 7.5V while the

transceiver is transmitting.
(7)Turn the encoder to change the current APC value and adjust

the transmission power.

29

TH-K2AT/K2E/K2ET

ADJUSTMENT

(8)Press the [MENU] key to write the current APC value into

the EEPROM.

27.5V TX H power (Center frequency)
(1)Press the [LAMP] or [MONI] key on the transceiver to display

“P7C” on the LCD.
In this case, the “

(2)Press the [VFO], [MR] or [CALL] key to switch to the

frequency display.

(3)Turn the encoder to display the center frequency on the

LCD.

(4)Repeat steps (4) to (8) of ”17.5V TX H power (Lower limit

frequency)” described on page 29.

37.5V TX H power (Upper limit frequency)
(1)Press the [LAMP] or [MONI] key on the transceiver to display

“P7H” on the LCD.
In this case, the “

” icon appears.

” icon appears.

(5)Press the [PTT] key to enable the transmit mode.
(6)Adjust the output voltage from DC power supply until the

voltage at the battery terminal becomes 7.5V while the
transceiver is transmitting.

(7)Turn the encoder to change the current APC value and adjust

the transmission power.

(8)Press the [MENU] key to write the current APC value into

the EEPROM.

27.5V TX M power (Center frequency)
(1)Press the [LAMP] or [MONI] key on the transceiver to display

“P7C” on the LCD.
In this case, the “

(2)Press the [VFO], [MR] or [CALL] key to switch to the

frequency display.

(3)Turn the encoder to display the center frequency on the

LCD.

(4)Repeat steps (4) to (8) of ”17.5V TX M power (Lower limit

frequency)” described on page 30.

” icon appears.

(2)Press the [VFO], [MR] or [CALL] key to switch to the

frequency display.

(3)Turn the encoder to display the upper limit frequency on

the LCD.

(4)Repeat steps (4) to (8) of ”17.5V TX H power (Lower limit

frequency)” described on page 29.

G. 7.5V TX M power (Lower limit frequency, center

frequency, upper limit frequency)

17.5V TX M power (Lower limit frequency)
(1)Press the [LAMP] or [MONI] key on the transceiver to display

“P7L” on the LCD.
In this case, the “
The current APC value is displayed at the lower digits of
the frequency display, and the value stored in the EEPROM
is displayed on the memory channel number display.

(2)Press the [VFO], [MR] or [CALL] key to switch to the

frequency display.

(3)Turn the encoder to display the lower limit frequency on

the LCD.

(4)Press the [CALL] key to switch to the adjustment display.

” icon appears.

37.5VTX M power (Upper limit frequency)
(1)Press the [LAMP] or [MONI] key on the transceiver to display

“P7H” on the LCD.
In this case, the “

(2)Press the [VFO], [MR] or [CALL] key to switch to the

frequency display.

(3)Turn the encoder to display upper limit frequency on the

LCD.

(4)Repeat steps (4) to (8) of ”17.5V TX M power (Lower limit

frequency)” described on page 30.

H. 7.5V TX L power (Lower limit frequency, center

frequency, upper limit frequency)

17.5V TX L power (Lower limit frequency)
(1)Press the [LAMP] or [MONI] key on the transceiver to display

“P7L” on the LCD.
In this case, the “
The current APC value is displayed at the lower digits of
the frequency display, and the value stored in the EEPROM
is displayed on the memory channel number display.

” icon appears.

” icon appears.

30

TH-K2AT/K2E/K2ET

ADJUSTMENT

(2)Press the [VFO], [MR] or [CALL] key to switch to the

frequency display.

(3)Turn the encoder to display the lower limit frequency on

the LCD.
(4)Press the [CALL] key to switch to the adjustment display.
(5)Press the [PTT] key to enable the transmit mode.
(6)Adjust the output voltage from DC power supply until the

voltage at the battery terminal becomes 7.5V while the

transceiver is transmitting.
(7)Turn the encoder to change the current APC value and adjust

the transmission power.
(8) Press the [MENU] key to write the current APC value into

the EEPROM.

27.5V TX L power (Center frequency)
(1)Press the [LAMP] or [MONI] key on the transceiver to display

“P7C” on the LCD.

In this case, the “

(2)Press the [VFO], [MR] or [CALL] key to switch to the

frequency display.
(3)Turn the encoder to display the center frequency on the

LCD.
(4)Repeat steps (4) to (8) of ”17.5V TX L power (Lower limit

frequency)” described on page 30.

37.5V TX L power (Upper limit frequency)
(1) Press the [LAMP] or [MONI] key on the transceiver to display

“P7H” on the LCD.

In this case, the “

” icon appears.

” icon appears.

The current APC value is displayed at the lower digits of
the frequency display, and the value stored in the EEPROM
is displayed on the memory channel number display.

(2)Press the [VFO], [MR] or [CALL] key to switch to the

frequency display.

(3)Turn the encoder to display the lower limit frequency on

the LCD.
(4)Press the [CALL] key to switch to the adjustment display.
(5)Press the [PTT] key to enable the transmit mode.
(6)Turn the encoder to change the current APC value and adjust

the transmission power.
(7)Press the [MENU] key to write the current APC value into

the EEPROM.

213.8V TX H power (Center frequency)
(1) Press the [LAMP] or [MONI] key on the transceiver to display

“P13C” on the LCD.

In this case, the “

(2)Press the [VFO], [MR] or [CALL] key to switch to the

frequency display.
(3)Turn the encoder to display center frequency on the LCD.
(4)Repeat steps (4) to (7) of ”113.8V TX H power (Lower

limit frequency)” described on page 31.

313.8V TX H power (Upper limit frequency)
(1)Press the [LAMP] or [MONI] key on the transceiver to display

“P13H” on the LCD.

In this case, the “

” icon appears.

” icon appears.

(2)Press the [VFO], [MR] or [CALL] key to switch to the

frequency display.

(3)Turn the encoder to display the upper limit frequency on

the LCD.

(4)Repeat steps (4) to (8) of ”17.5V TX L power (Lower limit

frequency)” described on page 30.

I. 13.8V TX H power (Lower limit frequency, center

frequency, upper limit frequency)

113.8V TX H power (Lower limit frequency)
(1)Press the [LAMP] or [MONI] key on the transceiver to display

“P13L” on the LCD.
In this case, the “

” icon appears.

(2)Press the [VFO], [MR] or [CALL] key to switch to the

frequency display.
(3)Turn the encoder to display upper limit frequency on the

LCD.
(4)Repeat steps (4) to (7) of ”113.8V TX H power (Lower

limit frequency)” described on page 31.

31

TH-K2AT/K2E/K2ET

ADJUSTMENT

J. 13.8V TX M power (Lower limit frequency, center

frequency, upper limit frequency)

113.8V TX M power (Lower limit frequency)
(1)Press the [LAMP] or [MONI] key on the transceiver to display

“P13L” on the LCD.
In this case, the “
The current APC value is displayed at the lower digits of
the frequency display, and the value stored in the EEPROM
is displayed on the memory channel number display.

(2)Press the [VFO], [MR] or [CALL] key to switch to the

frequency display.

(3)Turn the encoder to display the lower limit frequency on

the LCD.
(4)Press the [CALL] key to switch to the adjustment display.
(5) Press the [PTT] key to enable the transmit mode.
(6)Turn the encoder to change the current APC value and adjust

the transmission power.
(7)Press the [MENU] key to write the current APC value into

the EEPROM.

213.8V TX M power (Center frequency)
(1)Press the [LAMP] or [MONI] key on the transceiver to display

“P13C” on the LCD.

In this case, the “

” icon appears.

” icon appears.

(4)Repeat steps (4) to (7) of “113.8V TX M power (Lower

limit frequency)” described on page 32.

K. 13.8V TX L power (Lower limit frequency, center

frequency, upper limit frequency)

113.8V TX L power (Lower limit frequency)
(1)Press the [LAMP] or [MONI] key on the transceiver to display

“P13L” on the LCD.
In this case, the “
The current APC value is displayed at the lower digits of
the frequency display, and the value stored in the EEPROM
is displayed on the memory channel number display.

(2)Press the [VFO], [MR] or [CALL] key to switch to the

frequency display.

(3)Turn the encoder to display the lower limit frequency on

the LCD.
(4)Press the [CALL] key to switch to the adjustment display.
(5)Press the [PTT] key to enable transmit mode.
(6)Turn the encoder to change the current APC value and adjust

transmission power.
(7)Press the [MENU] key to write the current APC value into

the EEPROM.

213.8V TX L power (Center frequency)
(1)Press the [LAMP] or [MONI] key on the transceiver to display

“P13C” on the LCD.

In this case, the “

” icon appears.

” icon appears.

(2)Press the [VFO], [MR] or [CALL] key to switch to the

frequency display.

(3)Turn the encoder to display the center frequency on the

LCD.

(4)Repeat steps (4) to (7) of “113.8V TX M power (Lower

limit frequency)” described on page 31.

313.8V TX M power (Upper limit frequency)
(1)Press the [LAMP] or [MONI] key on the transceiver to display

“P13H” on the LCD.
In this case, the “

(2)Press the [VFO], [MR] or [CALL] key to switch to the

frequency display.

(3)Turn the encoder to display the upper limit frequency on

the LCD.

32

” icon appears.

(2)Press the [VFO], [MR] or [CALL] key to switch to the

frequency display.
(3)Turn the encoder to display the center frequency on the

LCD.
(4)Repeat steps (4) to (7) of ”113.8V TX L power (Lower limit

frequency)” described on page 32.

313.8V TX L power (Upper limit frequency)
(1)Press the [LAMP] or [MONI] key on the transceiver to display

“P13H” on the LCD.

In this case, the “

” icon appears.

TH-K2AT/K2E/K2ET

ADJUSTMENT

(2)Press the [VFO], [MR] or [CALL] key to switch to the

frequency display.

(3)Turn the encoder to display the upper limit frequency on

the LCD.

(4)Repeat steps (4) to (7) of ”113.8V TX L power (Lower limit

frequency)” described on page 32.

L. DCS modulation balance

(1)Press the [LAMP] or [MONI] key on the transceiver to display

“DCS.BAL” on the LCD. Press the [F] key and then the
[PTT] key repeatedly to turns the “

(2)When the [PTT] key is pressed to enable transmit mode, a

100Hz square waveform is internally generated and
modulated.

(3)While observing the waveforms on the oscilloscope, turn

the semi-fixed volume (VR6) to adjust the DCS modulation
waveform to a square waveform.

(4)When the DCS modulation waveform becomes a square

waveform, release the [PTT] key.

” icon ON.

2Tone deviation (Center frequency)
(1)Press the [LAMP] or [MONI] key on the transceiver to display

“DVC” on the LCD.
In this case, the “
then the [PTT] key repeatedly to turn the “

(2)Press the [VFO], [MR] or [CALL] key to switch to the

frequency display.

(3)Turn the encoder to display the center frequency on the

LCD.

(4)Repeat steps (4) to (7) of ”1Tone deviation (Lower limit

frequency)” described on page 33.

3Tone deviation (Upper limit frequency)
(1)Press the [LAMP] or [MONI] key on the transceiver to display

“DVH” on the LCD.
In this case, the “
then the [PTT] key repeatedly to turn the “

” icon appears. Press the [F] key and

” icon ON.

” icon appears. Press the [F] key and

” icon ON.

M.Tone deviation (Lower limit frequency, center

frequency, upper limit frequency)

1Tone deviation (Lower limit frequency)
(1)Press the [LAMP] or [MONI] key on the transceiver to display

“DVL” on the LCD.
In this case, the “
then the [PTT] key repeatedly to turn the “
The current adjustment value is displayed at the lower digits
of the frequency display, and the value stored in the
EEPROM is displayed on the memory channel number
display.

(2)Press the [VFO], [MR] or [CALL] key to switch to the

frequency display.

(3)Turn the encoder to display the lower limit frequency on

the LCD.
(4)Press the [CALL] key to switch to the adjustment display.
(5)When the [PTT] key is pressed to enable transmit mode, a

preset tone frequency (151.4Hz) is internally generated and

modulated.
(6)Turn the encoder to change the current adjustment value

and adjust tone deviation.
(7)Press the [MENU] key to write the current adjustment value

into the EEPROM.

” icon appears. Press the [F] key and

” icon ON.

(2)Press the [VFO], [MR] or [CALL] key to switch to the

frequency display.

(3)Turn the encoder to display the upper limit frequency on

the LCD.

(4) Repeat steps (4) to (7) of ”1Tone deviation (Lower limit

frequency)” described on page 33.

N. DCS deviation (Lower limit frequency, center frequency,

upper limit frequency)

1DCS deviation (Lower limit frequency)
(1)Press the [LAMP] or [MONI] key on the transceiver to display

“DVL” on the LCD.
In this case, the “
then the [PTT] key repeatedly to turn the “
The current adjustment value is displayed at the lower digits
of the frequency display, and the value stored in the
EEPROM is displayed on the memory channel number
display.

(2)Press the [VFO], [MR] or [CALL] key to switch to the

frequency display.

(3)Turn the encoder to display the lower limit frequency on

the LCD.

” icon appears. Press the [F] key and

” icon ON.

33

TH-K2AT/K2E/K2ET

ADJUSTMENT

(4)Press the [CALL] key to switch to the adjustment display.
(5)When the [PTT] key is pressed to enable transmit mode, a

preset DCS code (023) is internally generated and
modulated.

(6)Turn the encoder to change the current adjustment value

and adjust DCS deviation.

(7)Press the [MENU] key to write the current adjustment value

into the EEPROM.

2DCS deviation (Center frequency)
(1)Press the [LAMP] or [MONI] key on the transceiver to display

“DVC” on the LCD.
In this case, the “

(2)Press the [VFO], [MR] or [CALL] key to switch to the

frequency display.

(3)Turn the encoder to display the center frequency on the

LCD.

(4)Repeat steps (4) to (7) of ”1DCS deviation (Lower limit

frequency)” described on page 33.

” icon appears.

(2)Input a specified AG signal to microphone input.
(3)Press the [MENU] key to write the current microphone input

level value into the EEPROM.

2VOX sensitivity (Level 9)
(1)Press the [LAMP] or [MONI] key on the transceiver to display

“VOX9” on the LCD.
(2)Input a specified AG signal to microphone input.
(3)Press the [MENU] key to write the current microphone input

level value into the EEPROM.

3DCS deviation (Upper limit frequency)
(1)Press the [LAMP] or [MONI] key on the transceiver to display

“DVH” on the LCD.
In this case, the “

(2)Press the [VFO], [MR] or [CALL] key to switch to the

frequency display.

(3)Turn the encoder to display the upper limit frequency on

the LCD.

(4)Repeat steps (4) to (7) of ”1DCS deviation (Lower limit

frequency)” described on page 33.

O. VOX sensitivity (Level 1, level 9)

1VOX sensitivity (Level 1)
(1)Press the [LAMP] or [MONI] key on the transceiver to display

“VOX1” on the LCD.
Press the [F] key and then the [PTT] key repeatedly to turn
the “
The current microphone input level value is displayed at
the lower digits of the frequency display, and the value
stored in the EEPROM is displayed on the memory channel
number display.

” icon ON.

” icon appears.

34

TH-K2AT/K2E/K2ET

ADJUSTMENT

Common Section

Item Condition

1.Setting and
resetting

2

VCO
Lock voltage
Check

RX 2) Frequency: 173.990MHz (A/3) 4.3V or less
TX TX power: Low

3.

TX frequency
Adjust

4.

Overvoltage
warning
reference
voltage
Adjust/Check

Connect the optional PG-2W
DC cable to the power supply.
DC IN terminal voltage: 13.8V

1) Total illumination display
confirmation
Turn the Transceiver Power ON by pressing the power switch while the [F] key is pressed.
While the [F] key is pressed, all LCD segments light.

2) Full-resetting
After confirming that all LCD segments have lighted described in the Step 1 above, release
the [F] key, and then press the [F] key twice while “FL.RST?” appears on the display.

After removing 3 screws fixing
the TX-RX unit (B/3), remove
the TX-RX (B/3) unit from the
CN9 connector of the TX-RX
unit (A/3).

1) Frequency: 136.000MHz DVM TX-RX LV Check 0.7V or more

1) Frequency: 136.000MHz 0.7V or more
PTT: ON

2) Frequency: 173.990MHz 4.3V or less
PTT: ON
After observing the VCO
lock voltage, connect the
TX-RX unit (B/3) to the
original position.

1) TX power: Low f. counter ANT TX-RX VR1 145.990MHz ±150Hz
Frequency: 145.990MHz (A/3)
PTT: ON

Switch to Adjustment mode
and carry out the operations
for adjustment item A.
(Refer to page 28)

1) LCD display: DC DC power supply [MENU] Write
Frequency: 145.050MHz

(E, E3)

Frequency: 146.050MHz

(K, K2, M, M2)

DC IN terminal voltage: 14.8V

To exit from the Adjustment
Mode, turn the transceiver
power OFF and then ON.

2) Frequency: 145.050MHz Check

(E, E3)

Frequency: 146.050MHz

(K, K2, M, M2)

DC IN terminal voltage: 17.5V

Test equipment Unit

LCD total illumination display Initial configuration displayed after

Measurement Adjustment

Terminal

Unit

Parts Method

the full-reset.

Specifications/

Remarks

Alarm sound and
display “DC ERR”
message.

35

TH-K2AT/K2E/K2ET

ADJUSTMENT

Receiver section

Item Condition

1.RX BPF Squelch level: 0
Adjust 1) Frequency: 145.050MHz SSG TX-RX ANT VOL Turn the VOL knob 0.63V

(E, E3) Oscilloscope (A/3) SP knob to obtain 0.63V AF

Frequency: 146.050MHz Distortion meter output.

(K, K2, M, M2) AF V.M
SSG output: –53dBm (501 uV)
SSG MOD: 1kHz
SSG DEV: 3kHz

Switch to Adjustment mode
and carry out the operations
for adjustment item E.
(Refer to page 29)

2) LCD display: BPL Encoder Write Max Sensitivity
Frequency: 136.050MHz [MENU]
SSG: –119dBm (0.25 uV)

3) SSG: –113dBm (0.501 uV) Check 12dB SINAD or

4) LCD display: BPC Encoder Write Max Sensitivity
Frequency: 146.050MHz [MENU]
SSG: –119dBm (0.25 uV)

5) SSG: –120dBm (0.22 uV) Check 12dB SINAD or

6) LCD display: BPH Encoder Write Max Sensitivity
Frequency: 160.050MHz [MENU]
SSG: –119dBm (0.25 uV)

7) SSG: –113dBm (0.501uV) Check 12dB SINAD or

2.IF response 1) Frequency : 144.050MHz SSG Check 12dB SINAD or
Check

3.Squelch / Switch to Adjustment mode SSG ANT
S-meter and carry out the operations
Write for adjustment item C.

Squelch

SSG Frequency: 221.750MHz
SSG output: –60dBm (224uV)
SSG MOD: 1kHz
SSG DEV: 3kHz
AF output: 0.63V/8Ω

(Refer to page 28)

1) LCD display: SQ1 [MENU] Write Note: In the
Frequency: 145.050MHz Squelch adjust

(E, E3) ments, all 4

Frequency: 146.050MHz adjusting points

(K, K2, M, M2) including the S-

SSG: –125dBm (0.126uV) meter must be

2) LCD display: SQ2 [MENU] Write adjusted.
Frequency: 145.050MHz

(E, E3)

Frequency: 146.050MHz

(K, K2, M, M2)

SSG: –120dBm (0.22uV)

Test equipment Unit

Dummy load

Oscilloscope less
Distortion meter

Measurement Adjustment

Terminal

Unit

Parts Method

Specifications/

Remarks

more

more

more

Note: If the
specification is not
satisfied, repeat the
operations for
“1. RX BPF
Ad

just”.

36

TH-K2AT/K2E/K2ET

ADJUSTMENT

Item Condition

Switch to Adjustment mode
and carry out the operations
for adjustment item D.
(Refer to page 29)

S-meter 3) LCD display: S1 SSG TX-RX ANT [MENU] Write

Frequency: 145.050MHz (A/3)

(E, E3)

Frequency: 146.050MHz

(K, K2, M, M2)

SSG: –120dBm (0.22uV)

4) LCD display: S9 [MENU] Write
Frequency: 145.050MHz

(E, E3)

Frequency: 146.050MHz

(K, K2, M, M2)

SSG: –105dBm (1.26uV)

4.Squelch Squelch level: 1
Check 1) Frequency: 145.050MHz SSG Check Open Squelch

(E, E3) Oscilloscope

Frequency: 146.050MHz Distortion meter

(K, K2, M, M2)
SSG output: –123dBm (0.158uV)
SSG MOD: 1kHz
SSG DEV: 3kHz

2) SSG: OFF Close Squelch

5.S-meter 1) Frequency: 145.050MHz SSG Check Two segments
Check (E, E3) in S-meter

Frequency: 146.050MHz light.

(K, K2, M, M2) ■■

SSG output: –120dBm (0.22uV)

2)

SSG output: –105dBm (1.26uV)

6.Hum and 1) Frequency: 145.050MHz SSG TX-RX ANT
noise ratio (E, E3) Oscilloscope (A/3) SP
Check Frequency: 146.050MHz Distortion meter

(K, K2, M, M2) AF V.M
SSG output: –53dBm (501uV)
SSG MOD: 1kHz
SSG DEV: 3kHz
AF Output: 0.63V/8Ω
AF V.M = 0dB

2) SSG DEV: OFF Check –38dB or less

7.

AF distortion
Check

1) Frequency: 145.050MHz Check 5% or less
(E, E3)

Frequency: 146.050MHz

(K, K2, M, M2)

SSG output: –53dBm (501uV)
SSG MOD: 1kHz
SSG DEV: 3kHz
AF Output: 0.63V/8Ω

Test equipment Unit

Measurement Adjustment

Terminal

Unit

Parts Method

Specifications/

Remarks

All segments in
S-meter light.

■■■■■■■■■

37

TH-K2AT/K2E/K2ET

ADJUSTMENT

Item Condition

8.AF output 1) Frequency: 145.050MHz SSG TX-RX ANT Check
Check (E, E3) Oscilloscope (A/3) SP

Frequency: 146.050MHz Distortion meter

(K, K2, M, M2) AF V.M
SSG output: –53dBm (501uV)
SSG MOD: 1kHz
SSG DEV: 3kHz
AF distortion: 10%

9.Current Squelch level: 5
Drain 1) Frequency: 145.050MHz SSG Check 80mA or less
Check (E, E3) Am meter

Frequency: 146.050MHz

(K, K2, M, M2)

SSG output: OFF

2) Frequency: 145.050MHz 400mA or less
(E, E3)

Frequency: 146.050MHz

(K, K2, M, M2)

SSG output: –53dBm (501uV)
SSG MOD: 1kHz
SSG DEV: 3kHz
VOL knob: Max

Test equipment Unit

Measurement Adjustment

Terminal

Unit

Parts Method

Specifications/

Remarks

400mW or more

Transmitter section

Item Condition

1.

TX power
Write (Battery
terminal: 7.5V)

High power

Mid power

Battery terminal voltage:

7.5V
Note: Adjust the output voltage from DC power supply until the voltage at the battery terminal be-

comes 7.5V while the transceiver is transmitting.
Switch to Adjustment mode

and carry out the operations
for adjustment item F.
(Refer to page 29)

1)LCD display: P7L,
Frequency: 144.000MHz
PTT: ON

2)LCD display: P7C,
Frequency: 145.000MHz
PTT: ON

3) LCD display: P7H,

Frequency: 145.995MHz
PTT: ON
Switch to Adjustment mode
and carry out the operations
for adjustment item G.
(Refer to page 30)

4)LCD display: P7L,
Frequency: 144.000MHz
PTT: ON

5) LCD display: P7C,

Frequency: 145.000MHz
PTT: ON

Measurement Adjustment

Test equipment Unit

DC power supply
DVM

Power meter
Am meter

Terminal

TX-RX
(A/3)BGND

ANT Encoder

Unit

Parts Method

Write

[MENU]

Encoder
[MENU]

Encoder
[MENU]

Encoder
[MENU]

Encoder
[MENU]

Write

Write

Write

Write

Specifications/

Remarks

Note: Do not

use the DC IN
terminal.

4.8W ±0.05W

2.0A or less

1.5W ±0.05W

1.4A or less

38

TH-K2AT/K2E/K2ET

ADJUSTMENT

Item Condition

6) LCD display: P7H,

Mid power

Low power

2.

TX power
Write (DC IN
terminal: 13.8V)

High power

Mid power

Low power

Frequency: 145.995MHz
PTT: ON
Switch to Adjustment mode
and carryout the operations
for adjustment item H.
(Refer to page 30)

7)LCD display: P7L,
Frequency: 144.000MHz
PTT: ON

8)LCD display: P7C,
Frequency: 145.000MHz
PTT: ON

9)LCD display: P7H,
Frequency: 145.995MHz
PTT: ON

Connect the optional PG-2W
DC cable to the power supply.
DC IN terminal voltage: 13.8V
Switch to Adjustment mode
and carry out the operations
for adjustment item I.
(Refer to page 31)

1)LCD display: P13L,
Frequency: 144.000MHz
PTT: ON

2)LCD display: P13C,
Frequency: 145.000MHz
PTT: ON

3)LCD display: P13H,

Frequency: 145.995MHz
PTT: ON
Switch to Adjustment mode
and carry out the operations
for adjustment item J.
(Refer to page 31)

4)LCD display: P13L,
Frequency: 144.000MHz
PTT: ON

5)LCD display: P13C,
Frequency: 145.000MHz
PTT: ON

6)LCD display: P13H,
Frequency: 145.995MHz
PTT: ON

Switch to Adjustment mode
and carry out the operations
for adjustment item K.
(Refer to page 32)

7) LCD display: P13L,

Frequency: 144.000MHz
PTT: ON

Measurement Adjustment

Test equipment Unit

Power meter
Am meter

DC power supply
DVM

Power meter
Am meter

TX-RX
(A/3)

TX-RX
(A/3)

Terminal

ANT

DC IN

ANT

Unit

Parts Method

Encoder
[MENU]

Encoder
[MENU]

Encoder
[MENU]

Encoder
[MENU]

Encoder
[MENU]

Encoder
[MENU]

Encoder
[MENU]

Encoder
[MENU]

Encoder
[MENU]

Encoder
[MENU]

Encoder
[MENU]

Write

Write

Write

Write

Write

Write

Write

Write

Write

Write

Write

Specifications/

Remarks

0.5W ±0.05W

0.8A or less

5.0W - 5.1W

2.0A or less

1.5W ±0.05W

1.4A or less

0.5W ±0.05W

0.8A or less

39

TH-K2AT/K2E/K2ET

ADJUSTMENT

40

Item Condition

8) LCD display: P13C,
Frequency: 145.000MHz

Low power

3.Battery
terminal
reference
voltage
Adjust/
Check

4.DCS
modulation
balance

5.MAX DEV

PTT: ON

9) LCD display: P13H,
Frequency: 145.995MHz
PTT: ON
Switch to Adjustment mode
and carry out the operations
for adjustment item B.
(Refer to page 28)
TX power: Low

1)LCD display: BAT
Frequency:145.000MHz

Frequency:146.000MHz

PTT: ON
Battery terminal voltage: 7.5V
(Adjust the output voltage from DC power supply until the voltage at the
battery terminal becomes 7.5V while the transceiver is transmitting.)

To exit from the Adjustment
Mode, turn the transceiver
power OFF and then ON.

2)Frequency: 145.000MHz

Frequency:146.000MHz

PTT: ON
Battery terminal voltage: 6.4V
(Adjust the output voltage from DC power supply until the voltage at the
battery terminal becomes 6.4V while the transceiver is transmitting.)

Switch to Adjustment mode
and carry out the operations
for adjustment item L.
(Refer to page 32)
Detector: +P, –P
HPF: OFF LPF: 3kHz
De-emphasis: OFF
TX power: Low

1)LCD display: DCS.BAL
Frequency:145.000MHz

Frequency:146.000MHz

PTT: ON

To exit from the Adjustment
Mode, turn the transceiver
power OFF and then ON.
MIC terminal input
AG: 1kHz/80mV
Detector: +P, –P
HPF: OFF LPF: 15kHz
De-emphasis: OFF
TX power: Low

(E, E3)

(K, K2, M, M2)

(E, E3)

(K, K2, M, M2)

(E, E3)

(K, K2, M, M2)

Measurement Adjustment

Test equipment Unit

Power meter
Am meter

DC power supply
DVM

Linear detector
Oscilloscope

Linear detector
AG
Oscilloscope

TX-RX
(A/3)

TX-RX
(A/3)

Terminal

ANT

ANT

ANT
MIC

Unit

Parts Method

Encoder
[MENU]

Encoder
[MENU]

[MENU]
LCD

LCD

VR6

VR5

Write

Write

Write
Check

Check

By tuning the
VR6, adjust
the modulation
wave until
if becomes the
square wave.

4.2kHz
According to the
larger +, –.

Specifications/

Remarks

0.5W ±0.05W

0.8A or less

All segments
are lighted.

■■■■■■■■■

4 to 6 seg­ments are
lighted.

■■■■ ~

■■■■■■

±0.1kHz

TH-K2AT/K2E/K2ET

ADJUSTMENT

Item Condition

1)Frequency: 145.000MHz

Frequency: 146.000MHz

PTT: O N

6.MIC
sensitivity

Check

7.Tone
deviation

8.DCS
deviation

MIC terminal input
AG: 1kHz
Detector: P-P/2
HPF: OFF
LPF: 15kHz
De-emphasis: OFF
TX power: Low

1)Frequency: 145.000MHz

Frequency: 146.000MHz

PTT: ON
Switch to Adjustment mode
and carry out the operations
for adjustment item M.
(Refer to page 33)
Detector: P-P/2
HPF: OFF
LPF: 3kHz
De-emphasis: OFF
TX power: Low

1)LCD display: DVL,

Frequency: 144.000MHz

PTT: ON

2)LCD display: DVC,

Frequency: 145.000MHz

PTT: ON

3)LCD display: DVH,
Frequency: 145.990MHz
PTT: ON
Switch to Adjustment mode
and carry out the operations
for adjustment item N.
(Refer to page 33)
Detector: +P HOLD
HPF: OFF
LPF: 3kHz
De-emphasis: OFF
TX power: Low

1)LCD display: DVL,

Frequency: 144.000MHz

PTT: ON

2)LCD display: DVC,

Frequency: 145.000MHz

PTT: ON

3)LCD display: DVH,

Frequency: 145.990MHz

PTT: ON

(E, E3)

(K, K2, M, M2)

(E, E3)

(K, K2, M, M2)

Measurement Adjustment

Test equipment Unit

Linear detector
AG
Oscilloscope

Linear detector

TX-RX
(A/3)

Terminal

ANT
MIC

ANT

Unit

Parts Method

VR5

Encoder
[MENU]

Encoder
[MENU]

Encoder
[MENU]

Encoder
[MENU]

Encoder
[MENU]

Encoder
[MENU]

4.2kHz
According to the
larger +, –.

Change the AG
output level to
obtain 3kHz
deviation.

Write

Write

Write

Write

Write

Write

Specifications/

Remarks

±0.1kHz

4mV - 12mV

0.8kHz ±50Hz

0.8kHz ±50Hz

41

TH-K2AT/K2E/K2ET

ADJUSTMENT

9.VOX
Sensitivity
Write

10.VOX

11.DTMF

12.1750Hz

(E, E3 types
only)

13.Protection

(DC IN
terminal: 13.8V)

42

Item Condition

Switch to Adjustment mode
and carry out the operations
for adjustment item O.
(Refer to page 34)
TX power: Low

1)LCD display: VOX1
Frequency:145.000MHz

(E, E3)

Frequency:146.000MHz

(K, K2, M, M2)

AG: 1kHz/80mV

2)LCD display: VOX9
Frequency:145.000MHz

(E, E3)

Frequency:146.000MHz

(K, K2, M, M2)

AG: 1kHz/1.5mV

To exit from the Adjustment
Operation
Check

DEV
Check

Tone DEV
Check

Check

Mode, turn the transceiver

power OFF and then ON.

1)Frequency: 145.000MHz
(E, E3)

Frequency:146.000MHz

(K, K2, M, M2)

VOX Gain: 4
AG: OFF

2)AG: 1kHz/100mV

Detector: P-P/2
HPF: OFF
LPF: 15kHz
De-emphasis: OFF
TX power: Low

1)Frequency: 145.000MHz
(E, E3)

Frequency:146.000MHz

(K, K2, M, M2)

Send DTMF code “D”
Note: For details of sending DTMF code “D”,
refer to the “Single Tone Mode” on page 27.

Detector: P-P/2
HPF: OFF
LPF: 15kHz
De-emphasis: OFF
TX power: Low

1)Frequency: 145.000MHz
(E, E3)

Send 1750Hz Tone

TX power: High

1)Frequency: 145.000MHz
(E, E3)

Frequency: 146.000MHz

(K, K2, M, M2)

ANT: OPEN
PTT: ON

Measurement Adjustment

Test equipment Unit

AG

Linear detector

Am meter

TX-RX
(A/3)

Terminal

MIC

ANT

Unit

Parts Method

[MENU]

[MENU]

Write

Write

Check

Check

Check

Check

Specifications/

Remarks

Does not
transmit.

Transmits.

2.0kHz - 4.2kHz

2.5kHz - 4.5kHz

2.4A or less

TH-K2AT/K2E/K2ET

ADJUSTMENT / TERMINAL FUNCTION

Adjustment points
TX-RX unit (A/3)
Component side view

LV

B

VR6

BTEMP
GND

TX-RX UNIT (A/3)
Component side view

VR1 : TX frequency
VR5 : MAX DEV
VR6 : DCS modulation valance
LV : VCO lock voltage terminal

VR5

VR1

DC IN

SET

J2

MIC

TERMINAL FUNCTION

CN No. Pin No.

CN1 1 GND GND

ANT

LCD

J3

J4
SP

TX-RX UNIT (A/3) : TX-RX↔Internal speaker

CN2 1 SPK Internal speaker audio

TX-RX UNIT (A/3) : TX-RX↔TX-RX UNIT (B/3) : 10KEY

CN6, 1 PTT PTT
CN7 2 KIN4 Key matrix input

TX-RX UNIT (A/3) : TX-RX↔TX-RX UNIT (C/3) : PTT

CN8, 1 KIN1 Key matrix input
CN9 2 IM Internal microphone

Pin Name

Function

TX-RX UNIT (A/3) : TX-RX↔VOL/ENC

2 Vol-OUT RX audio volume output
3 Vol-IN RX audio volume input
4 EN2 Encoder 2
5 GND GND
6 EN1 Encoder 1

2 SPG Audio ground

3 KYO2 Key matrix output (MONI key)
4 KYO1 Key matrix output (LAMP key)
5BL LCD backlight control
6 GND GND

3 KYO3 Key matrix output
48M 8V power supply
5 KIN4 Key matrix input
6 MIG Microphone ground
7 LAMP Key illumination control
8 GND GND

9 KYO0 Key matrix output
10 KIN2 Key matrix input
11 KYO1 Key matrix output
12 KIN0 Key matrix input
13 KYO2 Key matrix output
14 KIN3 Key matrix input

43

JIHGFEDCBA

C

7

TH-K2AT/K2E/K2ET

1

PC BOARD

TX-RX UNIT (X57-674X-XX) (A/3) Component side view (J72-0883-09 A/3)
0-11 : K,K2 0-21 : M,M2 2-71 : E 2-72 : E3

2

10

CP1

R31

3

C1

4

L68

LV

+

C35

R24
R30

Q4

D7

C26

+

R21

5

C51

R132

6

7

C186

C189

L45

R131

C188

L46

Q23

C187

L64

C54
C55

8

C166

1

9

R127
C161

C176

IC3

89

C174

R135

C173

R125

C27

X1

R188

R133

16

C33

+

C25

C50

C52

C57

C56
R38

R126

C175

L58

R124

R123
C171

C30

C190

C172

C34

+

C192

C183

C182

C180

C38
C37

C41

C271

C272

R189

Q24

C194

R119 R120

R122

C24

C22

L53

1

IC1

89

R32

C42
R36

+

B

BTEMP

GND

R128

Q22

C191

R134

R118
C170

R90

R35

R351

C116

R117

D15

C126

R116

C169

D16

C66

C125

R33

+

R19

C46

C40

C168

Q21

Q6

R20

R34

16

C45

XF1

C117

R85

C167

R84

C21

C44

Q15

C20

C113

C112

34

C115

R115

D

G

R83

C111

R81

Q14

Q20

S

C43

D69

R18

CP2

C70

Q13

D

C114

D14

R82

8

C110

C356

1
6

R323

R218

R272

S

Q36

D

G

S

R215
R216

IC2

G

S

Q34

G

S

D

D

R213

G

Q35

R214

C515

C107

R75

C516

R149

45

1

R212

R332

1

KIN1

IM

2

C128

KYO3

8M

R142

C196

R146

C197

R79

R80

D31

KIN4

CN9

MIG

R145

R210

KYO0

LAMP

KIN2

GND

R78

C109

C108

R76

R211

13

KYO2

KYO1

KIN3

KIN0

14

C514

VR6

DCS BAL

R140R141

R74

R77

F3

C506

C105

D80

+

C193

C195

F1

D72

34

R144
R143

VR1

FREQ

D70

Q51

R231

R148

D71

1

6

R147

R137

TH3

+

R70

C106

J2

DC IN

MAX DEV

R330

R37

D

R151
R153

R71

D60

D62

D63

D64

D65

S

G

SET

VR5

Q27

C198

R152

R72

R255

C321

R257

C350

C349

2
KIN4

PTT
1

C318

S

GD

R58

C328

C320

R258

R324

C211

Q12

S

C78

C213

C331

C351

78

R259

R167

C212

R168

C339

C204

CN6

R264

IC17

R159

KYO1

KYO2

+

C203

R158

6

GND

BL

5

C510

R344

R157

R252

G

1

14

TH1

D

R

C85

R86

Q59

S

R261

R260
R166
R165
R171

R1

72

1

11

12

13

14

44

Ref. No. Address

IC1 4D
IC2 8F
IC3 9B
IC6 6M

IC9 9P
IC10 6P
IC11 6Q
IC15 7P

Ref. No. Address

IC17 9J

Q4 4C

Q6 3E
Q12 5J
Q13 7F
Q14 9E
Q15 5E
Q20 10E

Ref. No. Address

Q21 10D
Q22 10D
Q23 6B
Q24 8D
Q27 6H
Q31 6L
Q34 9F
Q35 10F

Ref. No. Address

Q36 10E
Q37 8L
Q38 7K
Q41 9Q
Q47 7S
Q51 4H
Q53 9Q
Q55 5P

Ref. No. Address

Q56 7L
Q57 8Q
Q59 8J

D7 4B
D14 8E
D15 9D
D16 4D
D25 6K

Ref. No. Address

D26 7L
D31 9F
D34 7L
D40 7S
D41 7S
D60 3H
D62 3H
D63 3H

Ref. No. Address

D64 4H
D65 4H
D69 3G
D70 3H
D71 3H
D72 3G
D80 10G

JKLMNOPQRS

C318

12

3

IC17

R159

04

KYO1

CN6

KYO2

+

R264

C203

R158

C510

6

GND

BL

5

R252

C85

D

TH1

R86

R344

Q59

D

G

S

R261

114

R260
R166
R165
R171

R170

172

R

R157

C118

C279

C310

Q38

B

E

R335

D25

PC BOARD

TH-K2AT/K2E/K2ET

TX-RX UNIT (X57-674X-XX) (A/3) Component side view (J72-0883-09 A/3)
0-11 : K,K2 0-21 : M,M2 2-71 : E 2-72 : E3

C312

C313

C258

R224

R217

C257

C253

R349

R203
C247

C280

Q37

R246 R248

R208

R209

R223

+

C249

Q31

G

D

S

R354

C248
R204

D26

D34

J3

MIC

C256

R207

IC6

C252

1

10

L49

R205

C250

R202

+

56

R206

Q56

G

D

S

C

POWER

C246

R276

+

C255

C359

–+

INT. SP

CN2

J4
SP

CP35

CP34

COM01
COM1
COM2
COM3

SEG0
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8

SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG3136

J72-0883-09 (A/3)

C304

C300

LCD

Q55

S

D

G

C305

R242

IC10

1234

R237

1

IC15

45

C360

C302

R244

6

IC9

1

34

C311

C309

Q41

C306

R243

R238

23

C307

L63

Q53

8

R328

IC11

C355

R236

C346

1345

C345

1
4

C308

C354

Q57

C344

C347C348

+

C319

C317

R263

R227
R226

C291
C290

5
1

Q47

1

2

3

ANT

4

5

6

D40

D41

7

34

8

9

10

Layer 1
Layer 2
Layer 3
Layer 4

11

Component side

12

Foil side

13

45

14

JIHGFEDCBA

C206

7

CN10

R

R

7

TH-K2AT/K2E/K2ET

1

PC BOARD

TX-RX UNIT (X57-674X-XX) (A/3) Foil side view (J72-0883-09 A/3)
0-11 : K,K2 0-21 : M,M2 2-71 : E 2-72 : E3

2

C92

R312

D17

C93

L19

R235

R326

R277

91

90

61

60

10

11

C98

R253

C97

R254

C101

3

L23

4

C99

C100

L21

L22

CN15

R285

CP32 CP33

C96

L20

R256

C95

C94

5

120

1

IC8

30

31

IC12

C330

4

R310

3

R313

C314

R318

C236

6

1

R275

6

C235

C316

1

6
ENCA

GND

ENCB

VOL IN

VOL OUT

GND

7

CN1

8

C335 C336

C332

R191

C303

9

+

R190

D36

C299

R241

C281

R343

C286

C285

C283

C298

R240

R239 C297

R283

R342

C284

R282

1

2

3

IC4

4

J72-0883-09 (A/3)

D12

R290

X3

C293 C294

R325

Q52

CP31

C232

C517

R201

C241

D13

D10

C242

R200

R199

C240

C295

R198

R291

R286

C239

C162

R196

L41

CN17

R195

L40

C504

C160

C512

R197

R185

C238

R192

R194

D21

R111

C230

+

C163

L17

D74

R110

C502

C89

C237

R193

D24

D20

C505

C158

C159

L18

C88

R353

D79

C357

TH4

C511

L38

R186

R345

R61

C91

C229

D22

C226

R183

R62

C503

C366

L16

R181

D27

C90

C231

C358

Q17

D

G

R102

C228

C227

R182

R104

S

R162

C153

Q30

R179

R180
C224
C223

Q29

R103

C20

C152

C82

5

1

R1

12

13

14

46

Ref. No. Address

IC4 10E
IC5 10K

IC8 7E
IC12 6B
IC16 8L

Q1 4P
Q2 3O
Q3 3P

Ref. No. Address

Q5 3N

Q9 4N
Q10 5N
Q11 6M
Q16 4L
Q17 3J
Q29 10J
Q30 8J

Ref. No. Address

Q33 9N
Q52 7G
Q58 6L

D1 3R
D2 3R
D5 2Q
D6 3Q
D8 4M

Ref. No. Address

D9 3M
D10 3G
D12 3G
D13 3G
D17 3F
D18 2L
D19 2K
D20 3I

Ref. No. Address

D21 3H
D22 10J
D24 8I
D27 9J
D30 8N
D32 8M
D33 8N
D35 7N

Ref. No. Address

D36 9D
D73 7N
D74 11I
D79 11I

JKLMNOPQRS

C503

C366

9

D27

83

C90

L16

R181

C231

C358

Q17

D

G

R102

C228

C227

R182

R104

S

R162

C153

Q30

R179

R180
C224
C223

Q29

R103

C82

C207

C152

5

1

R176

R101

L35

CN10

C83

R164

C206

R161

R178

R169

R163

C225

IC5

R273

C208

C222

34

R160
C205
R175

C148

R177

C218

R59

R174

C221
R173

D19

R100

C500 C501

C76

L15

R60

R64

Q58

G

8

C209
C210

C220

C219

C147

C72

D

C323

R99

C329

L56

S

IC16

D18

C145

C142

R341

R97

C134

C75

L55

C73

L13

C84

R155 R156

L50

C338

PC BOARD

TH-K2AT/K2E/K2ET

TX-RX UNIT (X57-674X-XX) (A/3) Foil side view (J72-0883-09 A/3)
0-11 : K,K2 0-21 : M,M2 2-71 : E 2-72 : E3

R10

D5

R4R5

C6

D

G

S

Q3

C10

C3

R13

Q1

B

CF1

C4

C5

L2

D2

L1

D1

D6

L6

R8

C7

R7

LV

C2

L3

R130

C178

R98

L14

45

1

C201

C270

L32

R93

C141

R96

C132

C74

D

C202

Q16
4

3

R95

1

2

C129
C131
C130

C137

C138

R92

L26

S
Q11

L66

C133

R91

C136

R88

L12

G

L29

C135

R94

L28

L27

B

E

R46

D8

C69

C326

L54

C71

C327

R56

C325
R346

R39

R54

D32

D9

C19
R45
R47

R347

C64

R271

R55

R50

C68
R41

D73

Q33

C18

L9

C61

Q9

R49

L10

23

Q10

1

R53
L11

C352

C276

R17

4

C67

D35

D33

C353

C65

C17

R15

C

R12

C15

C14

R6

L8

C11

R22

L5

R9

C9

C8

C179
C124

Q2

R11

C13

CD1

+

C177

R16

R348

Q5

R14

R52

R42

R51

C324

C282

D30

1

2

3

4

5

6

7

8

9

10

Layer 1
Layer 2
Layer 3
Layer 4

11

Component side

12

Foil side

13

47

14

JKLMNOPQRSIHGFEDCBA

TH-K2AT/K2E/K2ET

1

PC BOARD

TX-RX UNIT (X57-674X-XX) (A/3) Component side view (J72-0883-09 A/3)
0-11 : K,K2 0-21 : M,M2 2-71 : E 2-72 : E3

2

10

CP1

R31

3

C1

4

L68

LV

+
C35

R24
R30

Q4

D7

C26

+

R21

C27

5

C51

R132

6

7

C186

C189

L45

R131

C188

L46

Q23

C187

L64

C54
C55

8

C166

1

9

R127
C161

C176

IC3

89

C174

R135

C173

R125

X1

R188

R133

16

C33

+

C25

C50

C52

C56
R38

R126

C175

C57

L58

R124

R123
C171

C30

C190

C172

C34

+

C38
C37

C192

Q24

C183

C182
C180

C194

R122

C41

C271

C272

R189

R119

R120

C24

C22

L53

1

IC1

89

R32

C42
R36

+

B

BTEMP

GND

R128

Q22

C191

R134

R118
C170

R90

R35

R351

C116

R117

D15

C126

R116

C169

D16

C66

C125

R33

+

R19

R20

C46

C40

C168

Q21

R34

Q6

16

C45

XF1

C117

R85

C167

R84

C21

C44

Q15

C20

C113

C112

34

C115

R115

D

G

R83

C111

R81

Q14

Q20

S

C43

D69

R18

CP2

C70

Q13

D

C114

D14

R82

8

C110

C356

1
6

R323

R218

R272

S

Q36

D

G

S

R215
R216

IC2

G

S

Q34

G
S

D

D

R213

G

Q35

R214

C515

C107

R75

C516

R149

45

1

R212

R332

1

KIN1

IM

2

C128

KYO3

8M

R142

C196

R146

C197

R79

R80

D31

KIN4

CN9

MIG

R145

R210

KYO0

LAMP

KIN2

GND

R78

C109

C108

R76

R211

13

KYO2

KYO1

KIN3

KIN0

14

C514

VR6

DCS BAL

R140R141

R74

R77

F3

C506

C105

D80

+
C193

C195

F1

D72

34

R144
R143

VR1

FREQ

D71

D70

Q51

R231

TH3

R148

+

R70

C106

1

6

R147

R137

DC IN

R330

R37

J2

D60

D62

D63

D64

D65

SET

MAX DEV

VR5

S

D

Q27

G

R151
R153

C198

R71

R152

R72

R255

C321

R257

C350

C349

2

KIN4

PTT

1

C318

S

GD

R58

C328

C320
R258

R324

C211

Q12

S

C78

C213

C331

C351

78

R259

R167

C212
R168

C339

C204

CN6

R264

IC17

R159

KYO1

KYO2

+

C203
R158

6
GND

BL
5

C510

R344

R157

R252

G

1

14

TH1

D

R172

R86

C85

Q59

S

R261

R260
R166
R165
R171

R170

C118

C279

C310

Q38

B

E

R335

D25

PC BOARD

TH-K2AT/K2E/K2ET

TX-RX UNIT (X57-674X-XX) (A/3) Component side view (J72-0883-09 A/3)
0-11 : K,K2 0-21 : M,M2 2-71 : E 2-72 : E3

C312

C313

C258

R224

R217

C257

C253

R349

R203
C247

C280

Q37

R246 R248

R223

R208

R209

+

C249

Q31

G

D

S

R354

C248
R204

D26

D34

J3

MIC

C256

R207

IC6

C252

1

10

L49

R205

C250

R202

+

56

R206

Q56

G

D

S

C

POWER

C246

R276

+
C255

C359

–+

INT. SP

CN2

J4

SP

CP35

CP34

COM01
COM1
COM2
COM3

SEG0
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8

SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG3136

J72-0883-09 (A/3)

C304

C300

LCD

Q55

S

D

G

C305

R242

IC10

1234

R237

1

IC15

45

C360

C302

R244

6

IC9

1

34

C311

C309

Q41

C306

R243

R238

23

C307

L63

Q53

8

R328

IC11

C355

R236

C346

1345

C345

1
4

C308

C354

Q57

C344

C348

C347

+
C319

C317

R263

R227
R226

C291
C290

5
1

Q47

1

2

3

ANT

4

5

6

D40

D41

7

34

8

9

10

11

Component side

Layer 1
Layer 2
Layer 3
Layer 4

Foil side

12

13

Ref. No. Address

IC1 4D
IC2 8F
IC3 9B
IC6 6M

IC9 9P
IC10 6P
IC11 6Q
IC15 7P

Ref. No. Address

IC17 9J

Q4 4C

Q6 3E
Q12 5J
Q13 7F
Q14 9E
Q15 5E
Q20 10E

Ref. No. Address

Q21 10D
Q22 10D
Q23 6B
Q24 8D
Q27 6H
Q31 6L
Q34 9F
Q35 10F

Ref. No. Address

Q36 10E
Q37 8L
Q38 7K
Q41 9Q
Q47 7S
Q51 4H
Q53 9Q
Q55 5P

Ref. No. Address

Q56 7L
Q57 8Q
Q59 8J

D7 4B
D14 8E
D15 9D
D16 4D
D25 6K

Ref. No. Address

D26 7L
D31 9F
D34 7L
D40 7S
D41 7S
D60 3H
D62 3H
D63 3H

Ref. No. Address

D64 4H
D65 4H
D69 3G
D70 3H
D71 3H
D72 3G
D80 10G

44 45

14

11

12

13

14

JKLMNOPQRSIHGFEDCBA

TH-K2AT/K2E/K2ET

1

PC BOARD

TX-RX UNIT (X57-674X-XX) (A/3) Foil side view (J72-0883-09 A/3)
0-11 : K,K2 0-21 : M,M2 2-71 : E 2-72 : E3

2

C92

R312

D17

C93

L19

R235

R326

R277

91

90

61

60

10

11

C98

R253

C97

R254

C101

3

L23

4

C99

C100

L21

L22

CN15

R285

CP32 CP33

C96

L20

R256

C95

C94

5

120

1

IC8

30

31

IC12

C330

4

R310

3

R313

C314

R318

C236

6

1

R275

6

C235

C316

1

6
ENCA

GND

ENCB

VOL IN

VOL OUT

GND

7

CN1

8

C335

C332

R191

D36

R190

C299

R241

C281

C285

C283
C298

C303

9

+

R283

R343

C286

R240

R239 C297

C336

R342

C284

R282

1

2

3

IC4

4

J72-0883-09 (A/3)

D12

R290

X3

C293 C294

R325

Q52

CP31

C232

C517

R201

C241

D10

C242

R200

R199

C240

D13

C295

R198

R291

R286

C239

C162

R196

L41

R195

L40

CN17

C504

C160

C512

R197

R185

R194

C238

R192

D21

R111

C230

+

C163

L17

D74

R110

C502

C89

C237

R193

D24

D20

C505

C158

C159

L18

C88

R353

D79

C357

TH4

C511

L38

R186

R345

R61

C91

D22

C226

C229

R183

R62

C503

C366

L16

R181

D27

C90

C231

C358

D

G

Q17

C228

R102

C227

R182

R104

S

R162

C153

Q30

R179

R180
C224
C223

Q29

R103

C207

C152

C82

5

1

R176

R101

L35

CN10

C83

R164

C206

R161

R178

C225

IC5

R169

R273
R163

C208

R160
C205
R175

C222

34

C148

R177

C218

R174

C221
R173

D19

R100

C500 C501

C76

L15

R60

R64

R59

Q58

G

8

C209
C210

C220

C219

C147

C72

D

C323

R99

C329

L56

S

IC16

R155

C338

L50

C145
C142

R341

R97

C134

C75

C73

L13

C84

PC BOARD

TH-K2AT/K2E/K2ET

TX-RX UNIT (X57-674X-XX) (A/3) Foil side view (J72-0883-09 A/3)
0-11 : K,K2 0-21 : M,M2 2-71 : E 2-72 : E3

R10

D5

R4

C6

D

G

S

Q3

C10

C3

R13

Q1

B

CF1

C4

C5

L2

D2

L1

D1

D6

L6

R8

C7

R7

L3

R130

D18

L55

R98

L14

45

1

C201
R156

C270

L32

R93

C141

R96

C132

C74

D

C202

Q16
4

3

R95

1

2

C129
C131
C130

C137
C138

R92

S
Q11

L26

L66

C133

R91

C136

R88

L12

G

L29

R94

C135

L28

L27

B

E

R46

D8

C69

C326
L54

C71

C327

R56

C325
R346

R39

R54

D32

D9

C19
R45
R47

R347

C64

R271

R55

R50

C68
R41

D73

Q33

C18

L9

C61

Q9

R49

L10

23

1

R53
L11

C352

C276

Q10

R17

4

C67

D35

D33

C353

C65

C17

R15

R12

C15

C179
C124

Q2

R11
C13

CD1

+

C177

R16

R348

Q5

R14

R52

R42

R51

C324

C282

D30

C

R5

C14

R6

L8

C11

R22

L5

R9

C9

C8

1

2

3

LV
C2

4

5

6

7

8

C178

9

10

11

Component side

Layer 1
Layer 2
Layer 3
Layer 4

Foil side

12

13

Ref. No. Address

IC4 10E
IC5 10K

IC8 7E
IC12 6B
IC16 8L

Q1 4P
Q2 3O
Q3 3P

Ref. No. Address

Q5 3N

Q9 4N
Q10 5N
Q11 6M
Q16 4L
Q17 3J
Q29 10J
Q30 8J

Ref. No. Address

Q33 9N
Q52 7G
Q58 6L

D1 3R
D2 3R
D5 2Q
D6 3Q
D8 4M

Ref. No. Address

D9 3M
D10 3G
D12 3G
D13 3G
D17 3F
D18 2L
D19 2K
D20 3I

Ref. No. Address

D21 3H
D22 10J
D24 8I
D27 9J
D30 8N
D32 8M
D33 8N
D35 7N

Ref. No. Address

D36 9D
D73 7N
D74 11I
D79 11I

46 47

14

12

13

14

JIHGFEDCBA

TH-K2AT/K2E/K2ET

1

PC BOARD

TX-RX UNIT (X57-674X-XX) (B,C/3) Component side view (J72-0883-09 B,C/3)

2

0-11 : K,K2 0-21 : M,M2 2-71 : E 2-72 : E3

3

MENU

4

1/F 2/VFO 3/MR F/CALL

5

4

6

D42

D43

MIC1

+–

D46

VFO65

10

11

12

13

7

8

7

D44

*

9

MONI

Ref. No. Address

D42 4D
D43 5D
D44 8D
D46 5G
D47 8G

LAMP

89

D47

0

J72-0883-09 (B/3)

S7

PTT

MR

CALL#

J72-0883-09 (C/3)

Component side

Layer 1
Layer 2
Layer 3
Layer 4

Foil side

14

48

ABCDEFGHI J

PC BOARD

TH-K2AT/K2E/K2ET

TX-RX UNIT (X57-674X-XX) (B,C/3) Foil side view (J72-0883-09 B,C/3)
0-11 : K,K2 0-21 : M,M2 2-71 : E 2-72 : E3

C243

+

–

R337

R336

14 13

KIN3
KIN0
KIN2
GND
MIG
8M
IM

2

CN8

KYO2
KYO1
KYO0
LAMP

KIN4

KYO3

KIN1

1

2

3

Q50

G

D

S

1

4

5

6

D49

J72-0883-09 (C/3)

Ref. No. Address

Q50 3I

D48 11C
D49 11B

J72-0883-09 (B/3)

D48

R230

Layer 1
Layer 2
Layer 3
Layer 4

2

6

KIN4

KYO1

GND

CN7

KYO2

PTT

BL

1

5

Component side

Foil side

7

8

9

10

11

12

13

49

14

A B C D E

R

P

E

1

2

3

4

5

6

7

TH-K2AT/K2E/K2ET

50

X57-674 1/5

ROTARY
ENCODER

&

VOL KNOB

8 OHM

ENCA

ENCB
VOLIN

VOLOUT

MIC

SP

SP

DC IN

BATTERY
TERMINAL

TX-RX UNIT (X57-674X-XX)(A/3)

5MS

MOD

ENCB

VOLIN

6

GND

5
4
3

0.01u

2

GND

1

CN1

C231

J3

PTT
MIC

IM

5MS

C511

C512

*

SPG
REM/TXD
SPK
AFO

CN2
1

2

J2

*

C517

*

SPK
SPG

13.8V

C270
1000p

C338

1u

REVERSE CURRENT
PREVENTION

D30

RB521S-30

2SB1184(Q,R)

CHARGE SW

C271

1000p

470p

C272

Q33 OPERATION SW

J4

C235

R197

Q33

10k

R212

ENCA

R190

100

NAR

47k

1000p

L50

2SK1830

D31

DA221

CONSTANT­CURRENT
CIRCUIT

MOD

VOLIN

5MS

NAR

TO

QT/DQT

ENCA
ENCB

WX1050Hz

C350

*

C195

T0

10u10

C193

R144

4.7u6.3

C236

0.01u

R191

47k

R193

R192

470

C237

5MS

R194

10k

10k

R198

R199

1k

C241

C240

1000p

C246

100u10

REVERSE CURRENT
PREVENTION

D32

RB051L-40

C352
1000p

D80

RB521S-30

C506

1000p
R332
R210

R211

470k

Q34

0

1.8k

C238

R260

R257

*

R140

C505

0.047u

D79

10u10

DA221

R195

1000p

R200

10k

1000p

15

12

BTEMP
CHARGE

C351

0.01u

R264

*

47k

C331

1000p

C320

*

C321

*

R258

*

R141

18k

180k

R142

R143

470

R149

R147

VR5

470

50k

MAX DEV

D74,79

LIMITER

D74
DA221

R196

10k

100

C239

1000p

IM
MIG
TXD

R201

4.7k

C242

0.01u

47k

R202

D80

REVERSE CURRENT
PREVENTION

1000p

3

VIN

11.5V AVR

C283 1000p

T:0V
R:4.89V

CTCSS/DCS/WX FILTER

5R

1

R261

*

2
3
4
5
6
7

R259

*

*

WX DETECTION AMP

VR6
100k

4.7k

47k

-t

TH3

R137

100k

R148

150k

W/N

WIDE/NARROW
CHANGEOVER SW

REM

C358

0.047u

C218

RXD

PTTE

REM

VOLOUT

D26

C246 DISCHARGE

SP MUTE
SPEED UP

D25

2SK1830

MA2S111

R203
470k

C247

0.1u

13.43V

11.45V

C284

C285

1000p

1

2

VSS

VOUT

IC4

GND

4

IC17

NJM2902V

V+

R344

DCS BAL

R330

470

4.7k

Q27

2SK1830

C219

0.047u

1000p

MIC
MUTE
SW

2SC4919

R204

Q31

0

R349

C286 1u

XC6202PB52FR

GND

Q59

*

C196

R153

1k

680

R151

R152 150k

C220

4700p

C221

0.01u

R173

Q29

R182

1k

MIC MUTE
CONTROL

SP MUTE SW

D26

180k

C248

Q31
Q56 OPERATION SW

RB051L-40

C353

D33,35,36

REVERSE
CURRENT
PREVENTION

RB521S-30

C282 1000p

RB521S-30

C281

SCHEMATIC DIAGRAM

R170

47k

R171

56k (D)

120k

R324

47k

C339

0.047u

T:4.92V
R:0V

V+

0.01u

1000p

R1611kC206

4.7k

C225

1u

0.01u

C229

0.1u

TA7368F

VCC

RIPPLE

AF AMP

R216

10k

4.80V

0

R218

5MS

(D)

C349

0.1u

5T

8
7
6
5

R169

0.015u

R179

R178

0

Q30

2SC4617(R)

VOX
DETECTION AMP

0.1u

C226

D24

MA742

1

7.07V

1

2
3
4

VIN

5

C255

10u10

13.58V

C279

Q38

2SC4617(R)

C280

1k

R335

R163

560k

C208
82p
R164
10k(D)

100k(D)

T:4.96V
R:0V

39k

R180

220k

470

R181

C230 1u

R185 270k

R208 10

R207

1k

C256

Q37

2SB1184(Q,R)

1000p

1000p

R217

14
13
12
11
10
9
8

6800p

15k

1SS361

Q56

1SS388

0.1u

D33

D35

D36

R145

4.7k

C198

1u

R174

R176

D22

CPH3417

C249

1000p

1000p

560k

3
2
1

820k

R354

1000p

C197

0

R172

R165
820k

R146

6800p

R155
100k

NJM2107F

R186

3.23V

R205

C250

C276

1000p

R213

R272 4.7k

C213

10k

C203

R166

820k

C211

2200p

18k

C201

1200p

R156

100k

C202
270p

HPF
IC5

V+

R183

33k

68k

C227

100

C253

1u

10u10

22k

Q35

2SK1830

DC IN
DETECTION

Q36

NI-MH
TEMPERATURE
DETECTION

R157
330k

120p

R158
330k

180k

C212

0.012u

4

5

2.2u4

4.7u6.3

R167

-t

TH4

R353

VOLOUT

R214

MICM
PTTE

L49

R206

33k

RXD

MIG
TXD
SPM

C252

15

2.08V

C204

1
2
3
4

C205

0.047u

R177

C223

100k

RB706F-40

IM

100p

10k

R168

180k

R175

2.2k

10k

1000p

D27

R215

0.033u

NJM2904V

GND

C210

C209

C224

10

9
8

7
6

F1

2.5A
F3

0.5A

470k

Q36

2SJ347

R159

MIC AMP

IC16

R160

C222

0.1u

C228

0.1u

IC6

POUT
PW-GND
PRE-GND
PHASE
NF

TX LED

T:73mV
R:3.39V

Q47

RN1701

C290

1000p

1k

R273

5MV5MV

C207

0.01u

R162

180k

DTMF/1750

MIC ALC
RECTIFICATION

C232

1000p

VOX DETECTION
RECTIFICATION

R223

R209

220k

100k

C257

1000p

DTMF/BEEP/1750/W-ALT

5C/5R/5T AVR

7.07V

8V

Q37

AF AMP/
LAMP AVR

AVR
CONSTANT-

D34

VOLTAGE

MAZS0270H

4.31V

820

Q38

Q37 OPERATION SW

D40

D27

D24

R224

18k

R226

1000p

D41

B30-2156-05

R227

220

C291

1000p

C258

0.1u

BUSY LED

B30-2157-05

100

T:3.29V
R:110mV

TX/BUSY
LED SW

MOD

VOLIN

5MS

NAR

TO

QT/DQT

5R

5C
ENCA
ENCB

RXLED

NOAA

5MV

SIGIN

TONE

REM

VOXIN

MICM

DTMF/BEE

RXD

PTTE

MIG
TXD
SPM

5C/5R/5T AV

8V

AFAMP

5M

BTDET
DCDET

+B

BTEMP

CHARG

5T

+B

IM

F G H I J

SCHEMATIC DIAGRAM

TX-RX UNIT (X57-674X-XX)(A/3)

MOD

VOLIN

5MS

5T

+B

NAR

TO

QT/DQT

5R

5C
ENCA
ENCB

RXLED

NOAA

5MV

SIGIN

TONE

REM

VOXIN

MICM

DTMF/BEEP

LCD (B38-0881-05)

COM13COM24COM3

COM0

1

2

COM1

COM2

COM0

COM0
COM1
COM2
COM3

SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24

SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31

COM3

SEG06SEG1

5

SEG0

SEG1

CP31

3.9k

R276

7

R275

SEG28SEG39SEG4

SEG2

SEG3

47k

R277

47k

47k

SEG4

C359

0.1u

R326

TH-K2AT/K2E/K2ET

MOD

VOLIN

5MS

5T
+B

NAR

TO

QT/DQT

5R

5C
ENCA
ENCB

SEG19

SEG20

SEG21

SEG22

27

28

SEG22

SEG23

SEG23

SEG24

29

SEG24

SEG2531SEG2632SEG2733SEG28

30

SEG26

SEG25

SEG27

34

SEG28

TEMP

SEG29

SEG29

SMV
SQV
5MV

35

SEG30

36

SEG30

SEG31

SEG31

SEG5

SEG7

SEG6

10

11

SEG6

SEG5

SEG10

SEG814SEG9

12

13

15

SEG7

SEG8

SEG9

SEG10

SEG1117SEG12

16

SEG11

SEG14

SEG1521SEG1622SEG1723SEG1824SEG1925SEG2026SEG21

SEG13

18

19

20

SEG13

SEG12

SEG14

SEG15

SEG16

SEG17

SEG18

R342 0

R282

0

45

464748

SQ

REM

SIGIN

MPU

IC8

90522BPFFG139

KIN2

KIN0

KIN1

104

105

106

C336

0.1u

43

44

AVRL

AVSS

KIN3

KIN4

107

108

4.7k

R323

495051

52

53

545556

57

58

59

60

COM2

COM3

VSS

SEG16

SEG17

SEG18

SEG19

SEG20

SEG21

SEG22

SEG23

SEG24

NC

NC

SEG25

SEG26

SEG27

SEG28

SEG29

SEG30

SEG31

V0

V1

V2

V3

HST(VCC)

MD2

MD1

MD0

RESET

COM1

VSS

91

NAR

COM0

92X093X194

61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84

0

85
86
87
88
89
90

VCC

LAMP

AFAMP

VCC

95

PWRSW

96

CHARGE

INTUP

97

BTEMP

INTDW98DCDET

SM

BATT

VOXIN

THERM

BSFT

PLLEN

PLLLD

RXLED

99

100

101

102

103

R283

R343 0

0

C335

0.1u

39

40

41

42

DVSS

AVCC

AVRH

TONE

DTMF/BEEP

TYPE

VUKEY

NOAA

MICM

109

110

111

1125R113

C332

0.1u

32

333435

36

37

38

5MS

DVCC

SHIFT

1145T115

ENCB

KOUT0

VSS

C0R1

ENCA

SEG15

VSS

KOUT1

KOUT2

KOUT3

116

117

118

119

31

SEG14

SEG13
SEG12

SEG11

SEG10

5C(SAVE)

BPF/APC

EEPCS

EEPDI

CLOCK

BTDET

120

SEG9

SEG8

SEG7

SEG6

SEG5

SEG4

SEG3

SEG2

SEG1

SEG0

FINAL

PTTE

KAPC

PTTI

SPM

DATA

0.1u

TXD

RXD

AFM

VCC

VOX

C360

SEG15
SEG14

30

SEG13

29

SEG12

28

SEG11

27

SEG10

26

SEG9

25

SEG8

24

SEG7

23

SEG6

22

SEG5

21

SEG4

20

SEG3

19

SEG2

18

SEG1

17

SEG0

16
15

R318

14

1k

13
12
11
10

4.83V

9

R313

8

3.3k
7
6
5
4
3
2
1

R310

3.9k

TEMP
FINAL

AFM
KAPC
DATA

CLOCK

SHIFT
PLLLD

PLLEN

SMV

SQV

5MV

5M

5MS SW

LAMP

5C SW

VOX

5R SW
5T SW

BATT

5M

PTTI

BPF/APC

EEPCS
EEPDI

INT0

PWR SW

47k

R325

Q52

RN1107

C293

47p

R285

X3

R235

7.982MHz

1k

5p

5p

C294

C295

0

R286

0

CP35 1k

+B

ON:4.76V

BEAT SHIFT SW

RXD

PTTE

IM
MIG
TXD
SPM

5C/5R/5T AVR 5C/5R/5T AVR

8V

AFAMP

5M

BTDET

DCDET

+B

BTEMP

CHARGE

1k

1k

1k

CP34 1k

R254

R253

R256

1k

CP33

4.7k

CP32 1k

R312

RESET

KOUT3
KOUT2
KOUT1
KOUT0
VUKEY

TYPE
KIN4
KIN3
KIN2
KIN1
KIN0

IM

MIG

8V
5M

+B

X57-674 2/5

K L M N O

TH-K2AT/K2E/K2ET

TX-RX UNIT (X57-674X-XX)(A/3)

MOD

VOLIN

5MS

5T
+B

NAR

TO

QT/DQT

5R

5C
TEMP
FINAL

AFM
KAPC
DATA

CLOCK

SHIFT

PLLLD
PLLEN

SMV

SQV

5MV

5M

R237 100k

EEPROM

IC15

1000p

C298

VCC

HOLD

SCK

100k

R240

8

C355

C354

7
6
5

SI

330k

1000p

R238 1k
R236

C299 1u

0.01u

1k

+B

5MS SW

Q41

4.83V 4.66V

RN2105

5MS

C346

1000p

5C SW

RN2105

5.0V AVR

Q57

1000p

C344

123

GND1

CONT

IC9

TK11250CM

5

1u

C309

1000p

C300

5MS SW

LAMP

5C SW

VOX
5R SW
5T SW

BATT

1

CS

2

SO

3

WP

4

GND

AT25160N10SI27

R2391kR241

0.1u

C297

SCHEMATIC DIAGRAM

1NP2

3

GND

CONT

5.0V AVR

VIN6VOUT

4

5.01V

C314

1000p

C311

0.1u

NP

4.92V

GND26VIN

VOUT

4

R244

0

C302

1000p

C316

0.1u

T:4.95V
R:0V

IC12

TK11250CUCB

C330

C319

1000p

10u10

1000p

C304

S-80844CNNBB85

4.4V VOLTAGE DETECTION 3.3V VOLTA GE DETECTION

C303

150u6.3

T:0V
R:4.90V

Q53

RN2701

5R/5MV
SW

C347

1000p

2

C348

1000p

4.68V 4.69V

R242

330k

1

OUT

VDD

INT0 RESET

C305 1000p

VSS

NC

4

3

IC10

5T SW

T:4.95V
R:0V

CPH3317

C306 1000p

Q55

470k

R328

C345

R243

330k

1

VSS

2

VDD

IC11

S-80930CNNBG80

OUT

CD

1000p

MOD

VOLIN

5MS

5T

+B

NAR

TO

QT/DQT

5R

5C
TEMP
FINAL

AFM

KAPC

DATA

CLOCK

SHIFT

PLLLD
PLLEN

SMV
SQV

4

C308

C307

0.1u

3

1000p

5M

PTTI

BPF/APC

EEPCS

EEPDI

INT0

PWR SW

RESET

KOUT3
KOUT2
KOUT1
KOUT0
VUKEY

TYPE
KIN4
KIN3
KIN2
KIN1
KIN0

IM

MIG

5C/5R/5T AVR

8V
5M

+B

X57-674 3/5

R248

R246

3.9k

3.9k

0.039u

MARKET CODE
DETECTION

TYPE

BIT2

D63

*

D71

D70

MA2S111

KYO2

KIN0

12

13

12

13

1/F

4

7

*

C310

BIT1

D64

MA2S111

KYO1

11

11

1u

D65

MA2S111

R255

D72

MA2S111

KIN2

KYO0

9

10

2/VFO

5

8

0

BIT0

MA2S111

0

JUMPER

GND

LAMP

3/MRMRF/CALL

10k

R263

C317

POWER SW

MIG

KIN48MKYO3IMKIN1

6

9

#

VFO

CALL

1000p

TX-RX UNIT
(X57-674X-XX)(C/3)

CN7

CN6

PTT
KIN4
KYO2
KYO1
BL

GND

150

Q51

RN4902

1000p

R337

D46

R231

ON:6.90V

MIC1

470

B30-2205-05

D42-44,46,47
KEY

ILLUMINATION
LED

SET

C516

C515

C514

*

*

*

LCD LED SW

TX-RX UNIT
(X57-674X-XX)(B/3)

CN9

1

2345678910

R336

D42

D43

B30-2205-05

220

B30-2205-05

Q50
2SK1830

C243

R230

*

D44

*

D47

*

KEY LED SW

ON:4.78V

CN8

1

2345678

1

1

2

2

3

3

4

4

5

5

6

6

B30-2237-05

MONI

LAMP

D48

S7

S70-0485-05

D48,49

LCD
ILLUMINATION
LED

B30-2237-05

L63

R252

D60 D62-65

C318

1000p

KEY TYPE
DETECTION

D69-72

REVERSE
CURRENT
PREVENTION

10KEY BOARD

KEY

D60

*

MENU

D62

D69

MA2S111

BIT3

*

KIN3

14

14

C312

C313

0.039u

100k

BPF/APC

PTT

D49

PTT BOARD

P Q R S T

SCHEMATIC DIAGRAM

TX-RX UNIT (X57-674X-XX)(A/3)

MOD

VOLIN

5MS

5T

+B

NAR

TO

QT/DQT

5R

5C
TEMP
FINAL

AFM

KAPC

DATA

CLOCK

SHIFT
PLLLD
PLLEN

SMV
SQV

5C

TO

5MS

DATA

VOLIN

PLLLD

PLLEN

CLOCK

QT/DQT

5C

DATA

VOLIN

PLLLD

PLLEN

CLOCK

QT/DQT

BPF/APC

SQV

SMV

SQV

SMV

BPF/APC

NAR

NAR

5R

AFM

5R

AFM

CN15 CN17

MOD

SHIFT

C1

SHIFT

R37 56k

C56 1000p

R38 56k

*

LV

L68

L1

10u

0.01u

D5

FREQUENCY SHIFT

CP1 2.7k

R5 100k

R31

2.2k

C35

0.1u35

FREQ

VR1

500k

VC

VCC

12.8MHz

GND

OUTPUT

X1

L77-1931-05

D1,2

VCO FREQUENCY CONTROL

D1

1SV325

D2

1SV325

D5

C4

1000p

HSC277

L2

47n

Q3

2SK1830

C11

1000p

R6 1k

VCO SHIFT CONTROL SW

R30

1.2k

470

R24

C33

0.22u35

C34

4.7u6.3

4.63V1.58V

L64

C51

4.7u

22p

10p

C57

10p

C52

C54

C55

1000p

0.01u

VCO MODULATION

C2

L3 82n

1000p

L6 10u

1000p

C5 0.1u

C6

R4 1k

C30 1000p

C50 22p

D16

PLL LOCK DETECTION

R35 120k

D16

R32

1k

MA2S111

C40 0.1u

R36 10

5C

C46 100p

C7

R7

47k

R8 100k

3.63V

TH-K2AT/K2E/K2ET

5T
+B

TEMP
FINAL

KAPC

C19

D6

(B)

(B)

0.5p

8.2k

3p

C3

R22

D6

1SV305

Q4

2SC4617(R)

C25

1000p

C27

8

OSCI

GND310CE11CLK12DATA

9

C45 100p

C44 100p

C8

C9

VCC1

R13

Q1

2SC5066(O)

(G)

VCO

27p

(G)
27p

RIPPLE FILTER

C26

10u10

C37

1000p

C38

0.01u

FIN

FIN

PLL IC

13LE14

6.8k

R9

L5

1000p

SPEED UP

GND2

10u

D7

GND1

FO/LD15VCC216VP

CP2

3.9k

270

C10

CPO

C43

C13

0.5p
(B)

0.01u

MA2S111

1234567

FLO

0.01u

PLLEN
DATA
CLOCK
PLLLD

R10

R21

C42

R11 150k

RF AMP

Q2

2SC5488

47

4.45V

4.7k

IC1

LMX2316TMX

C41

1000p

L53 15n

4.45V

4.7u6.3

120n
L8

C14 1000p

C22
18p

C24

1000p

R348

220

RF AMP

R15 5.6k

Q5

2SC5488

470

3.3k

C17

R14

R16

1000p

R19 120k

1k

R20

Q6

2SC5488

C21

1000p

RF AMP

C15

12p

R12 47

15p

82n

L9

R17 3.3k

10

R18

C18

1000p

FINAL

C20

8p

KAPC
TEMP

SQV

SMV

BPF/APC

NAR

CF1

L72-0968-05

T:0V
R:4.63V

5R

0.1u

C168

R116

AF FILTER

2SC4617(R)

Q20

VOLIN

2SK1830

AF MUTE SW

AFM

5R

120k

R118 27k

C169

0.068u
R117

2.7k (D)

Q21

C167

0.1u

R115 5.6k

0.1u

C124

C170

0.068u

R120

2.7k

WIDE/NARROW
CHANGEOVER SW

W:111mV
N:4.79V

R119

1.8k

C194

Q22

RN2105

R122

2.7k

0.1u

C171

R127

1000p

47

C177

SQ FILTER

560

R125

R123

1.8k

22u6.3

C161

C178

1000p

C175

0.01u

450kHz

R131 330k

L58

R188 47

2nd L.O.

C187

2p

560n

4.82V

820n

R133

C192

1k

0.01u

4.76V

L46 560n

R130 100

IF AMP

Q24

2SC5488

C188

C189

24p

1000p

R189

R134
390k

0

Q23

KTC4082
TRIPLER

0.72V

C173

180p

R135

470k

0.1u

R128

3.3k

CD1

450kHz

0.1u

8

FILINAFOUT

9

C176

IFIN

DEC

FILOUT

FM IC

QUAD

IFOUT

RSSI

10111213141516

C180

120p

C182

SMV

C174

180p

27k

R126

22p

R124

3.3k

C172

1800p

C179

5R 5R

VCC

N-DET

0.1u

MIXOUT

N-REC

SQV

OSCOUT

GND

C183

C166

0.01u

1234567

0.1u

OSCIN

MIXIN

C186

IC3

TA31136FN

C190

0.01u

24p

L45

0.53V

2.2k

C191

0.01u

R132

5R

BPF/APC

X57-674 4/5

YXWVU

TH-K2AT/K2E/K2ET

TX-RX UNIT (X57-674X-XX)(A/3)

5T
+B

FINAL

KAPC
TEMP

5R

5T

+B

5T

R351

R45

R90
330

220

RF SW

D8

HSC277

D9

HSC277

RF SW

3.3k

R46

L28
27n

APC CIRCUIT
OPERATION SW

L71-0619-05

C125

1.5p

10k

L29 22n

C135 12p

38.85MHz
1st IF

XF1

R47 5.6k

C61 1000p

C136

C126

10p

2SK1830

10p

T:4.23V

RF AMP

Q9

2SC5488

5p

R88
330

R346

C138

L66

R:0V

68

C325

1000p

1000p

120n

R70

L27
680n

L26

470n

C130

R93 47

C64

0.39

R49 330

R92

1000p

C510

R71

3.3k

C132

1000p

*

R50 33

0.01u

0.39

R91

C131

R72

1k

C129

0.01u

C65 18p

L10 82n

R51 470

R59

12k

2.29V
(HIGH POWER)

C105

0.39
C106

4.71V

11p

R94 330

R60

R74

100k

(D)

1000p

1000p

100k

(D)

1st MIXER

C133

R75

3SK318

TX PATH

R347

100

2.00V

4.90V

C137

Q13

C107

1000p

C128

0.01u

R42 100

R52 1k

56k

Q16

0.01u

1.40V

C78

2.68V

C134

T:4.85V
R:0V

DRIVE
AMP

Q10

2SC4926YD

C324

1000p

Q15

22

2SC4617(R)

R33

Q10 OPERATION SW

Q12

POWER

2SK3476

AMP

T:0V
R:0V

CN10

10

R58

Q12 GATE

0

1u

VOLTAGE SW

R64

C328

1000p

R76 150k (D)

APC

C108

DIFFERENTIAL
AMP

100p

150k

IC2

(D)

1

R77

C109

R78 150k

150k (D)

1000p

AOUT

27

A-IN

36

A+IN

1000p

4

GND

(D)

R79

C110 1000p
C356 0.01u

R95

100k

2.42V 4.66V

R341

0

R97

82k

R98 82k

R96 82k

C141

1000p

R53 100

C67

C66

12.29V

Q58

2SK1830

NJM2904V

C142

1000p

3.3k

1u

C323

BOUT

B+IN

1000p

R34

56p

C85

1000p

V+

B-IN

L32

L11 82n

5T

100p

C366

82n

C68
18p

1u

C70

C503 100p

5T

8

R80 10k

5

C111

R82

D18,19

RX BPF TUNING

C501

1.5p
(B)

22p

C145

(G)

R99

D18

1SV305

C147

SCHEMATIC DIAGRAM

12.46V

R271

12

R41 270

R39 270

L17

18.5n

L16

0.1u

0.01u

1000p

C84

C82

C83

C357 1u

R81 390k
C112 1000p

1000p

R83 56k

27k

C113

REVERSE CURRENT PREVENTION

C500

1.5p
(B)

22p

C148

D19

1.0M

1.0M

R100

1SV305

1000p

5R

C326

1000p

VOLTAGE
DROP

R61 220

R62 220

C91

1000p

82n

(G)

L35

R101 47

C88

1000p

R84

C69 4p

1000p

C89

56p

APC

100k

R103

C152

L12

10n

R55 470

D73

VGG

ANTENNA SW

XB15A709

L18 220n

C90

1000p

APC OUTPUT SW

D14

C114

MA2S111

D14

R102

0

2.7k

1000p

C153

1.30V

L54 56n

R56 1k

MA2S111

D10

DC SW

Q14

RN4902

1000p

2SK1215(E)
RX 1st AMP

1000p

2SK2596

DRIVE
AMP

R54 100

C71

C327

0.1u

1000p

C94

1000p

9T

L19

C93 8p

R85 560

C115

1000p

KAPC

0.27V

R345

0

Q17

C158

D20

56

R104

L38 82n

Q11

C73

1000p

VDD

L207TL21

C96 12p

(G)

(G)

C97 12p

C95 12p

D12

D13

HVC131

D12,13

ANTENNA SW

10u4

C116

APC OUTPUT
VOLTAGE LIMITTER

D20,21

RX BPF TUNING

C159

2p

(B)

22p

(G)

1.0M

1SV305

R110

L14

L13

C502

L55
10n

47n

C72

9T

C98 8p

(B)

(G)

HVC131

VGG

D15

3p

(B)

R111 1.0M

C163

C74

0.1u

C99 13p

C92

MA8039

C160

D21

1000p

1000p

C100 7p

C117

C75

33p

L22

9T

(B)

(G)

D17

1000p

HSM88AS

C118

1000p

(G)

(B)
2p

27p

C504

1SV305

C329

L56

C101 24p

R86

1000p

L40

L41

56p

22n

C76

(G)

L23

OVER INPUT
PROTECTION

TEMP

5.6k

COMPENSATION

-t

10k

TH1

68n

C162

R291

47p
(G)

18n

1

L15

6.8n

39p

2

ANT

9T

3

4

R290

0

0

5

5R

BPF/APC

X57-674 5/5

R257

56k

NONO0

D47

B30-2205-05

NO
B30-2205-05
B30-2205-05

R258

680

0

R259
680k

D60

NO

MA2S111

NO
NO

R261

R264

47k

0

NO

0

NO

X57-674X-XX

0-11

TH-K2AT

2-71

TH-K2E

2-72

TH-K2ET

0-21

TH-K2AT

X57-674X-XX

0-11

TH-K2AT

2-71

TH-K2E

2-72

TH-K2ET

0-21

TH-K2AT 220 NO 0 0 NO 0 NO NO

K,K2

M,M2

K,K2

M,M2

D44

B30-2205-05

NO

E

B30-2205-05

E3

B30-2205-05

R230

220

E

NO

E3

220

D62
MA2S111
MA2S111
MA2S111

NO

NO

0
0

R344

100k

NO
NO

MA2S111

MA2S111

D63NOQ59

NO
NO

Reference voltage value are measured when the power supply voltage is 13.8V(DC IN).

2SK1830

NO
NO

CN17

NO
E23-1081-05
E23-1081-05

C320

8200p

NO
NO
NO

C321

8200p

C350

0.1u

NO

NO
NO

NO
NO

NO

C510

NO
100p
100p

NONONO

C511

470p
470p

C512

470p
470p

C514

C515

C516

C517

NO

NO

NO

NO

470p

470p

470p

470p

NO

NO

NO

470p
470p

NO
470p
470p

NO

NO

6

Note : The components marked with a

dot (

●) are parts of layer1.

7

TH-K2AT/K2E/K2ET

SCHEMATIC DIAGRAM

ROTARY
ENCODER

&

VOL KNOB

8 OHM

ENCA

ENCB
VOLIN

VOLOUT

MIC

SP

SP

DC IN

BATTERY
TERMINAL

TX-RX UNIT (X57-674X-XX)(A/3)

WX1050Hz

T0

5MS

MOD

NAR

ENCA

ENCB

GND

GND

J3

J4

CN1

J2

VOLIN

6
5
4
3
2
1

PTT
MIC

IM

5MS

C511

*

SPG
REM/TXD
SPK
AFO

C517

*

CN2
1

SPK

2

SPG

13.8V

C270
1000p

C338

1u

REVERSE CURRENT
PREVENTION

RB521S-30

2SB1184(Q,R)

CHARGE SW

C271

1000p

470p

C272

C235

0.01u

R190

47k

C231

1000p

5MS

R197

100

C512

*

R198

C240

REVERSE CURRENT
PREVENTION

L50

D30

Q33

D31

DA221

10k

CONSTANT­CURRENT
CIRCUIT

R212

Q34

2SK1830

Q33 OPERATION SW

C193

4.7u6.3

C236

0.01u

R191

47k

100u10

10k

R199

1000p

C246

MOD

VOLIN

5MS

NAR

QT/DQT

ENCA
ENCB

*

R192

470

R194

10k

1k

RB051L-40

TO

C350

C195
10u10

R144

R193

C237

C241

D32

C352
1000p

D80

RB521S-30

C506

1000p

R332

R210

R211

470k

0

0.047u

1.8k

10u10

C238

R200

1000p

R260

R257

*

R140

C505

D79
DA221

10k

15
12

BTEMP
CHARGE

C351

0.01u

R264

*

47k

C331

1000p

C320

*

C321

*

R258

*

R141

18k

180k

R142

R143

470

R149

R147

VR5

470

50k

MAX DEV

D74,79

LIMITER

R195

100

C239

1000p

IM
MIG
TXD

4.7k

C242

0.01u

R202

D80

REVERSE CURRENT
PREVENTION

3

VIN

11.5V AVR

C283 1000p

5R

R261

*

R259

*

WX DETECTION AMP

4.7k

47k

-t

TH3

100k

R148

150k

W/N

WIDE/NARROW
CHANGEOVER SW

REM

0.047u

D74
DA221

RXD

R196

PTTE

10k

1000p

REM

VOLOUT

R201

D26

C246 DISCHARGE

SP MUTE
SPEED UP

47k

D25

MA2S111

R203

470k

C247

13.43V

11.45V

C284

C285

1000p

1000p

1

2

VSS

VOUT

GND

4

T:0V
R:4.89V

CTCSS/DCS/WX FILTER

IC17

NJM2902V
1
2
3
4

V+

GND

5
6
7

R344

*

*

VR6
100k

DCS BAL

R153

R330

470

R137

4.7k

680

R151

Q27

2SK1830

C219

C358

0.047u

C218

1000p

MIC
MUTE
SW

Q29

2SC4919

R182

D26

180k

R204

Q31

2SK1830

C248

0.1u

Q31

0

R349

Q56 OPERATION SW

RB051L-40

C353

D33,35,36

REVERSE
CURRENT
PREVENTION

C282 1000p

IC4

C286 1u

XC6202PB52FR

C281

14
13
12
11
10
9
8

Q59

R145

4.7k

C196

6800p

C198

1k

1u

R152 150k

C220

4700p

C221

0.01u

15k

R173

R176

1k

D22

1SS361

MIC MUTE
CONTROL

SP MUTE SW

Q56

1SS388

0.1u

C249

D33

1000p

D35

RB521S-30

D36

RB521S-30

1000p

R174

560k

3
2
1

820k

CPH3417

R354

1000p

0

C197

R165
820k

C276

R155
100k

C250

10k

R172

R146

18k

6800p

HPF

IC5

NJM2107F

R183

33k

68k

R186

3.23V

100

R205

1u

1000p

22k

R213

2SK1830

DC IN
DETECTION

NI-MH

R272 4.7k

TEMPERATURE
DETECTION

VOLIN

QT/DQT

TEMP
FINAL

KAPC

CLOCK

SHIFT
PLLLD
PLLEN

BPF/APCBPF/APC

MOD

5MS

NAR

AFM
DATA

SMV
SQV

R54 100

C327

0.27V

R345

C93 8p

0

56

C512

470p
470p

12.46V

L55
10n

Q11

2SK2596

DRIVE
AMP

C71

0.1u

1000p

47n

L14

C73

L13

1000p

VDD

L207TL21

C96 12p

(G)

(G)

HVC131

D12,13

C97 12p

D13

9T

C98 8p

(B)

(G)

HVC131

C94

1000p

9T

L19

C95 12p

D12

ANTENNA SW

VGG

R85 560

D15

10u4

C116

APC OUTPUT
VOLTAGE LIMITTER

C115

1000p

KAPC

D20,21

RX BPF TUNING

C159

C502

3p

2p

(B)

(B)

22p

(G)

C158

1.0M

D20

1SV305

L38 82n

R110

R111 1.0M

C163

C514

C515

C516

NO

NO

NO

NO
470p
470p

NO

dot (

NO

470p

470p

470p

470p

NO

NO

●) are parts of layer1.

C72

C74

0.1u

C99 13p

C92

C117

MA8039

C160

D21

1000p

C517

470p
470p

C75

1000p

33p

L22

9T

C100 7p

(B)

(G)

D17

1000p

HSM88AS

1000p

(G)
27p

1SV305

NO

NO

C118

(B)
2p

C504

L56

C101 24p

C329

56p

22n

(G)

R86

TEMP

5.6k

COMPENSATION

TH1

1000p

68n

L40

C162

47p
(G)

18n

L41

L15

6.8n

39p

C76

9T

L23

OVER INPUT
PROTECTION

-t

10k

R291

0

ANT

R290

0

RF AMP

Q9

2SC5488

5p

R88
330

K,K2

E

E3

M,M2

K,K2

E

E3

M,M2

R346

C138

L66

68

1000p

120n

L26

R93 47

T:4.23V
R:0V

C64

C325

1000p

R70

0.39

L27

680n

470n

C130

D44

B30-2205-05

NO
B30-2205-05
B30-2205-05

R230

220
NO
220

R49 330

1000p

C510

*

R71

R92

3.3k

1000p

C132

R257

56k

NONO0

R50 33

0.39

R91

C131

0.01u

L10 82n

R72

1k

4.71V

C129

0.01u

B30-2205-05

B30-2205-05
B30-2205-05

R258

680

C65 18p

R51 470

R60

R59

12k

2.29V
(HIGH POWER)

C105

0.39
C106

11p

R94 330

D47

NO

0

R74

100k

(D)

1000p

1000p

R75

100k

(D)

1st MIXER

C133

R259
680k

0
0

5T
+B

TO
5R

5C

CN15 CN17

*

TEMP
FINAL

KAPC

+B +B

5T5T

C19

SQV

SMV

SQV

SMV

BPF/APC

SQV

SMV

BPF/APC

NAR

NAR

NAR

LV

VOLIN

PLLEN

QT/DQT

DATA

PLLLD

CLOCK

5C

TO

5MS

MOD

5R

AFM

SHIFT

L68

C1

0.01u

D5

FREQUENCY SHIFT

CP1 2.7k

R5 100k

SHIFT

R31

2.2k

C35

0.1u35

D1,2

VCO FREQUENCY CONTROL

L1

10u

D1

1SV325

D2

1SV325

C4

1000p

HSC277

L2

47n

Q3

2SK1830

C11

1000p

R6 1k

VCO SHIFT CONTROL SW

R30

1.2k

470

R24

C33

0.22u35

C34

4.7u6.3

C2

1000p

L6 10u

D5

C5 0.1u

R4 1k

C50 22p

PLL LOCK DETECTION

FREQ

R115 5.6k

VC

12.8MHz

GND

L77-1931-05

R116

120k

500k

VCC

OUTPUT

X1

2.7k (D)

R118 27k

VR1

C169

0.068u
R117

WIDE/NARROW
CHANGEOVER SW

C55

4.63V1.58V

C57

C170

0.068u

L64

4.7u

10p

C54

0.01u

R120

2.7k

W:111mV
N:4.79V

R37 56k

C56 1000p

5R

AFM

DATA

VOLIN

PLLLD

PLLEN

CLOCK

QT/DQT

5C

C168

AF FILTER

Q21

2SC4617(R)

C167

R38 56k

0.1u

0.1u

Q20

VOLIN

2SK1830

AF MUTE SW

AFM

0.1u

5R

C124

C52

R119

1.8k

1000p

C51

22p

10p

C194

Q22

RN2105

MA2S111

C40 0.1u

R36 10

R122

2.7k

0.1u

1000p
C6

C30 1000p

D16

R35 120k

D16

C171

R127

D6

VCO MODULATION

L3 82n

C7

(B)

0.5p

R7

47k

D6

R8 100k

3.63V

C25

R32

1k

5C

C45 100p

C46 100p

T:0V
R:4.63V

5R

SQ FILTER

560

R125

R123

1.8k

1000p

C177

22u6.3

47

C13

0.5p
(B)

270

C10

MA2S111

12345

CPO

C43

CF1

L72-0968-05

C176

DEC

IFOUT

0.01u

FLO

0.01u

PLLEN
DATA
CLOCK
PLLLD

0.1u

IFIN

FM IC

RSSI

SMV

R10

R21

C42

VCC

N-DET

C182

R11 150k

RF AMP

Q2

2SC5488

47

4.45V

4.7k

IC1

LMX2316TMX

C41

1000p

MIXOUT

N-REC

C183

0.1u

SQV

4.7u6.3

1234567

OSCOUT

GND

0.1u

C14 1000p

L53 15n

4.45V

C166

0.01u

OSCIN

MIXIN

C15

12p

120n
L8

R12 47

C22
18p

TA31136FN

C190

0.01u

C186

IC3

1000p

24p

C24

L45

L58

R188 47

R348

220

2nd L.O.

C187

2p

560n

4.82V

820n

RF AMP

R15 5.6k

Q5

2SC5488

470

3.3k

C17

R14

R16

1000p

R19 120k

1k

R20

Q6

2SC5488

C21

1000p

RF AMP

4.76V

24p

C188

L46 560n

C189

1000p

R130 100

IF AMP

1k

R133

Q24

2SC5488

R189

C192

0.01u

R13

Q1

2SC5066(O)

(G)

VCO

C8

(B)

27p

8.2k

3p

C3

R22

(G)

C9

27p

1SV305

Q4

RIPPLE FILTER

2SC4617(R)

C26

1000p

1000p

C27

10u10

C37

1000p

C38

0.01u

678

FIN

FIN

OSCI

VCC1

GND2

PLL IC

GND310CE11CLK12DATA13LE14FO/LD15VCC216VP

9

C44 100p

450kHz

C173

C161

1000p

180p

R135

C174

8

180p

27k

C178

R126

C175

C172

0.01u

22p

R124

3.3k

1800p

C179

R128

3.3k

CD1

450kHz

0.1u

FILINAFOUT

9

6.8k

R9

L5

10u

D7

SPEED UP

GND1

CP2

3.9k

470k

FILOUT

QUAD

10111213141516

C180

120p

5R 5R

R17 3.3k

C18

1000p

C20

8p

R131 330k

Q23

KTC4082
TRIPLER

R134
390k

0

15p

82n

L9

10

R18

FINALFINAL

0.53V

R132

2.2k

KAPC KAPC

TEMPTEMP

5R 5R

0.72V

C191

0.01u

5R

5T

+B

5T

R351

R45

R90
330

220

RF SW

D8

HSC277

D9

HSC277

RF SW

3.3k

R46

L28

27n

APC CIRCUIT
OPERATION SW

L71-0619-05

C125

1.5p

TX PATH

R347

100

R47 5.6k

2.00V

10k

C61 1000p

4.90V

C137

L29 22n

C136

10p

C135 12p

Q13

2SK1830

C107

1000p

38.85MHz
1st IF

XF1

C128

0.01u

10p

C126

X57-674X-XX

TH-K2AT

0-11
2-71

TH-K2E

2-72

TH-K2ET

0-21

TH-K2AT

X57-674X-XX

0-11

TH-K2AT

2-71

TH-K2E

2-72

TH-K2ET

0-21

TH-K2AT 220 NO 0 0 NO 0 NO NO

R42 100

R52 1k

56k

2.68V

Q16

3SK318

0.01u

C78

C134

1.40V

R33

1000p

MA2S111

R261

1000p

D60
NO

NO
NO

47k
NO
NO

22

POWER
AMP

C328

R76 150k (D)

150k
R77

C109

R78 150k

150k (D)

R96 82k

C141

T:4.85V
R:0V

DRIVE
AMP

Q10

2SC4926YD

C324

1000p

Q15

2SC4617(R)

Q10 OPERATION SW

Q12

2SK3476

T:0V
R:0V

CN10

10

R58

Q12 GATE

0

1u

VOLTAGE SW

R64

2SK1830

R53 100

C67

C66

Q58

1000p

R34

3.3k

1u

12.29V

56p

C85

C323

5T

1000p

100p

C366

C68
18p

L11 82n

R41 270

1u

C70

R271

C326

12

1000p

R39 270

VOLTAGE
DROP

L17

18.5n

L16

C503 100p

0.1u

0.01u

1000p

R61 220

C84

C82

C83

C357 1u

R62 220

C91

5T

APC

C108

DIFFERENTIAL
AMP

100p

IC2

(D)

1000p

(D)

R79

NJM2904V

1

AOUT

27

A-IN

36

A+IN

4

GND

C110 1000p
C356 0.01u

BOUT

B-IN

B+IN

8

R80 10k

V+

5

C111

1000p

27k

R82

R81 390k
C112 1000p

R83 56k

C113

1000p

REVERSE CURRENT PREVENTION

R95

100k

2.42V 4.66V

C142

R341

0

1000p

R97

82k

R98 82k

82n

L32

D18,19

RX BPF TUNING

C501

1.5p
(B)

22p

C145

(G)

R99

D18

1SV305

C147

1.5p

1.0M

1000p

C500

(B)

R100

1.0M

C148

D19

22p

(G)

1SV305

5R

82n

L35

R101 47

1000p

C321

D62
MA2S111
MA2S111
MA2S111

NO

R264

NO

0
0

R344
100k

NO
NO

MA2S111

MA2S111

D63NOQ59

NO
NO

E23-1081-05
E23-1081-05

2SK1830

CN17

NO

C320

8200p

8200p
NO
NO

NO

NO
NO

NO
NO

NO

C88

1000p

R84

C350

0.1u

C69 4p

C89

1000p

APC

NO
NO
NO

56p

100k

R103

C152

1.30V

L12

10n

L54 56n

R56 1k

R55 470

D73

MA2S111

VGG

ANTENNA SW

D10

XB15A709

L18 220n

C90

1000p

APC OUTPUT SW

DC SW

Q14

RN4902

D14

1000p

C114

MA2S111

D14

R102

0

2.7k

Q17

2SK1215(E)
RX 1st AMP

1000p

R104

C153

1000p

C511

C510

NO

470p

100p

470p

100p

NONONO

Note :The components marked with a

BPF/APCBPF/APC

Reference voltage value are measured when the power supply voltage is 13.8V(DC IN).

D49

PTT

PTT BOARD

MOD

VOLIN

5MS

5T
+B

NAR

TO

QT/DQT

5R

5C
TEMP
FINAL

AFM

KAPC

DATA

CLOCK

SHIFT
PLLLD
PLLEN

SMV
SQV

MOD

VOLIN

5MS

5T

NAR

TO

QT/DQT

5R

5C
ENCA
ENCB

BUSY LED

RXLED

NOAA

5MV

SIGIN

TONE

REM

VOXIN

MICM

DTMF/BEEP DTMF/BEEP

+B

RXD

PTTE

IM

MIG
TXD
SPM

5C/5R/5T AVR 5C/5R/5T AVR 5C/5R/5T AVR 5C/5R/5T AVR

8V

AFAMP

5M
BTDET
DCDET

+B
BTEMP

CHARGE

R171

56k (D)

120k

R159

C339

0.047u

T:4.92V
R:0V

V+

0.01u

1000p

R1611kC206

R160

4.7k

C225

1u

0.01u

C229

0.1u

TA7368F

RIPPLE

AF AMP

R216

10k

4.80V

0

R218

5MS

R170

47k
(D)

R324

C349

47k

0.1u

8
7
6
5

R169

0.015u

R179

R178

0

Q30

2SC4617(R)

VOX
DETECTION AMP

0.1u

C226

D24

MA742

1

1

2

VCC

3
4

VIN

5

C255

13.58V

C279

2SC4617(R)

C280

1k

R335

5T

100k(D)

220k

C230 1u

7.07V

R207

1k

10u10

2SB1184(Q,R)

1000p

Q38

1000p

TX LED

R163

560k

C208
82p

R164
10k(D)

T:4.96V
R:0V

5MV5MV

39k

R180

C207

R162

470

R181

C232

1000p

R185 270k

R208 10

R209

100k

C256

1000p

DTMF/BEEP/1750/W-ALT

Q37

D34

820

R217

Q37 OPERATION SW

T:73mV
R:3.39V

Q47

1000p

1k

R273

0.01u

180k

DTMF/1750

MIC ALC
RECTIFICATION

VOX DETECTION
RECTIFICATION

R223

220k

C257

5C/5R/5T AVR

7.07V

8V

Q37

AF AMP/
LAMP AVR

AVR
CONSTANT­VOLTAGE

MAZS0270H

4.31V

Q38

D40

R226

RN1701

C290

D27

D24

R224

18k

1000p

D41

B30-2156-05

R227

220

C291

1000p

C258

0.1u

B30-2157-05

100

T:3.29V
R:110mV

TX/BUSY
LED SW

2.08V

C213

4.7u6.3

R157
330k

C203

120p

R158
330k

C204

180k

C212

R167

0.033u

R168
180k

R166

C211

820k

2200p

0.012u

MIC AMP

IC16

NJM2904V
1
2

C201

3

1200p

R156

4

100k

C202
270p

GND

C210

C209

C205

0.047u

R175

4

2.2k

5

10k

R177

C223

100k

33k

MICM

RXD

PTTE

IM
MIG
TXD
SPM

VOLOUT

L49

C252
100p

R206

15

C224

1000p

D27

RB706F-40

10

9
8

7
6

C222

0.1u

C228

0.1u

IC6

POUT
PW-GND
PRE-GND
PHASE
NF

V+

C227

C253

10u10

2.2u4

-t

TH4

R353

F1

2.5A
F3

0.5A

10k

R215

R214

Q35

470k

Q36

2SJ347

Q36

MOD

VOLIN

5MS

5T

NAR

TO

QT/DQT

5R

5C
ENCA
ENCB

RXLED

NOAA

5MV

SIGIN

TONE

REM

VOXIN

MICM

+B

RXD

PTTE

IM

MIG
TXD
SPM

8V

AFAMP

5M

BTDET

DCDET

+B

BTEMP

CHARGE

+B

LCD (B38-0881-05)

COM13COM24COM3

COM0

1

2

COM1

COM2

COM0

COM0
COM1
COM2
COM3

SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24

SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31

ON:4.76V

Q52

RN1107

BEAT SHIFT SW

COM3

R325

SEG06SEG1

5

SEG0

47k

C293

47p

R285

SEG1

CP31

3.9k

R276

0

SEG28SEG39SEG4

7

SEG2

R277

47k

47k

R275

X3

5p

C294

SEG4

SEG3

47k

0.1u

R235

7.982MHz

C295

R286

R326

C359

1k

5p

0

ENCA
ENCB

SEG19

SEG20

SEG21

27

SEG22

SEG22

SEG23

28

SEG23

SEG24

SEG2531SEG2632SEG2733SEG28

29

30

SEG25

SEG24

SEG26

SEG27

SEG28

SEG29

34

SEG29

TEMP

SMV
SQV
5MV

35

SEG30

SEG30

SEG31

36

SEG31

SEG5

SEG7

SEG6

10

11

SEG6

SEG5

SEG10

SEG814SEG9

12

13

15

SEG7

SEG8

SEG9

SEG10

SEG1117SEG12

16

SEG11

SEG14

SEG1521SEG1622SEG1723SEG1824SEG1925SEG2026SEG21

SEG13

18

19

20

SEG13

SEG12

SEG14

SEG15

SEG16

SEG17

SEG18

R342 0

C332

0.1u

R343 0

SEG15
SEG14

31

323334

VSS

C0R1

KOUT2

117

118

CP32 1k

30

SEG14

SEG15

SEG13

SEG13

29

SEG12

SEG12

28

SEG11

SEG11

27

SEG10

SEG10

26

SEG9

SEG9

25

SEG8

SEG8

24

SEG7

SEG7

23

SEG6

SEG6

22

SEG5

SEG5

21

SEG4

SEG4

20

SEG3

SEG3

19

SEG2

SEG2

18

SEG1

SEG1

17

SEG0

SEG0

16

FINAL

15

5C(SAVE)

R318

14

PTTI

1k

13

PTTE

12

TXD

11

RXD

10

SPM

AFM

VCC

KAPC

BPF/APC

VOX

EEPCS

EEPDI

DATA

CLOCK

VSS

BTDET

KOUT3

C360

0.1u

119

120

R312

4.83V

9

R313

8

3.3k
7
6
5
4
3
2
1

R310

3.9k

4.7k

R282

0

45

46

47484950515253

SQ

REM

SIGIN

MPU

IC8

90522BPFFG139

KIN2

KIN0

KIN1

104

105

106

C336

0.1u

44

AVRL

AVSS

KIN3

KIN4

107

4.7k

R323

54

55

56

57

585960

COM2

COM3

VSS

SEG16

SEG17

SEG18

SEG19

SEG20

SEG21

SEG22

SEG23

SEG24

NC

NC

SEG25

SEG26

SEG27

SEG28

SEG29

SEG30

SEG31

V0

V1

V2

V3

HST(VCC)

MD2

MD1

MD0

RESET

VSS

91

COM0

COM1

92X093X194

NAR

61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84

0

85
86
87
88
89
90

VCC

LAMP

AFAMP

VCC

95

PWRSW

96

CHARGE

INTUP

BTEMP

INTDW98DCDET

97

SM

BATT

VOXIN

THERM

BSFT

PLLEN

PLLLD

RXLED

99

100

101

102

103

1k

CP34 1k

CP35 1k

R256

108

1k

R254

R283

0

C335

0.1u

35

36

37

38

39

40

414243

AVCC

AVRH

TONE

TYPE

VUKEY

MICM

109

110

1k

R253

DTMF/BEEP

NOAA

111

DVSS

1125R113

DVCC

SHIFT

5MS

1145T115

1k

CP33

ENCB

KOUT0

ENCA

KOUT1

116

MOD

VOLIN

5MS

5T
+B

NAR

TO

QT/DQT

5R

5C
TEMP
FINAL

AFM
KAPC
DATA

CLOCK

SHIFT
PLLLD

PLLEN

SMV

SQV

5MV

5M

5MS SW

LAMP

5C SW

VOX

5R SW
5T SW

BATT

5M

PTTI

BPF/APC

EEPCS
EEPDI

INT0

PWR SW

RESET

KOUT3
KOUT2
KOUT1
KOUT0
VUKEY

TYPE
KIN4
KIN3
KIN2
KIN1
KIN0

IM
MIG

8V
5M

+B

MOD

VOLIN

5MS

5T
+B

NAR

TO

QT/DQT

5R

5C
TEMP
FINAL

AFM

KAPC

DATA

CLOCK

SHIFT
PLLLD

PLLEN

SMV
SQV
5MV

5M

5MS SW

LAMP

5C SW

VOX

5R SW
5T SW

BATT

5M

PTTI

BPF/APC

EEPCS
EEPDI

INT0

PWR SW

RESET

KOUT3
KOUT2
KOUT1
KOUT0
VUKEY

TYPE

KIN4

KIN3

KIN2

KIN1

KIN0

IM

MIG

8V
5M

+B

R237 100k

EEPROM

1

CS

2

SO

3

WP

4

GND

IC15

AT25160N10SI27

R2391kR241

0.1u

1000p

C298

C297

VCC

HOLD

SCK

100k

R240

L63

C316

0.1u

1NP2

3

8

C355

C354

7
6
5

SI

1000p

R238 1k
R236

0.01u

1k

5MS SW

Q41

4.83V 4.66V

RN2105

C346

1000p

5C SW

Q57

RN2105

1000p

C344

CONT

5.0V AVR

VIN6VOUT

4

C314

GND

1000p

5.01V

IC12

TK11250CUCB

C330

C319

1000p

T:4.95V
R:0V

10u10

C347

1000p

T:0V
R:4.90V

Q53

5R/5MV
SW

C348

1000p

RN2701

5T SW

T:4.95V
R:0V

Q55

CPH3317

R328

470k

C345

1000p

330k

4.68V 4.69V

R242

330k

1

OUT

VDD

INT0 RESET

C305 1000p

VSS

NC

4

IC10

R231

GND

C306 1000p

PTT
KIN4
KYO2
KYO1
BL

150

1

VSS

2

VDD

S-80930CNNBG80

CN6

1
2
3
4
5
6

R243

330k

4

OUT

C308

C307

0.1u

3

CD

IC11

TX-RX UNIT
(X57-674X-XX)(C/3)

CN7

1
2
3
4
5
6

S70-0485-05

MONI

LAMP

D48

B30-2237-05

1000p

S7

D48,49

LCD
ILLUMINATION
LED

B30-2237-05

GND1

R263

C311

0.1u

NP

4.92V

VOUT5GND26VIN

4

R244

0

C302

1000p

C303

150u6.3

2

1000p

C304

3

S-80844CNNBB85

4.4V VOLTAGE DETECTION 3.3V VOLTAGE DETECTION

10k

C299 1u

+B

5MS

5.0V AVR

123

CONT

IC9

TK11250CM

1u

C309

1000p

C300

R248

R246

3.9k

3.9k

C313

100k

R252

D60 D62-65

C318

1000p

KEY TYPE
DETECTION

0.039u

C312

C310

0.039u

MARKET CODE
DETECTION

1u

TYPE

C317

1000p

POWER SW

SET

D69-72

REVERSE
CURRENT
PREVENTION

BIT3

KEY

BIT2

BIT1

BIT0

D60

D62

*

D69

MA2S111

D64

D63

*

*

D70

MA2S111

D71

MA2S111

D65

MA2S111

R255

D72

MA2S111

MA2S111

0

JUMPER

ON:6.90V

Q51

C516

C515

MENU

KIN3
14

14

C514

*

KYO2

KIN0

KYO1

KIN2

KYO0

GND

LAMP

MIG

11

12

13

9

101112

13

1/F

2/VFO

4

5

7

8

0

*

KIN48MKYO3IMKIN1

3/MRMRF/CALL

6

VFO

9

#

CALL

2345678

CN9

1

2345678910

CN8

1

TX-RX UNIT
(X57-674X-XX)(B/3)

*

R336

D42

D43

B30-2205-05

*

220

B30-2205-05

Q50
2SK1830

RN4902

LCD LED SW

C243

1000p

R230

R337

*

D46

D44

*

D47

*

KEY LED SW

ON:4.78V

MIC1

470

B30-2205-05

D42-44,46,47
KEY

ILLUMINATION
LED

10KEY BOARD

ANTFILTER

Q12

ANT

TH-K2AT/K2E/K2ET

LEVEL DIAGRAM

50Ω

0.58Vrms

AMP

FM IC

IC3 IC6

Q11

Q10

Q9

vco

All voltage levels must be measured at High power transmission.

The RF and IF sections are measured by using a spectrum analyzer.

After setting the standard (1 kHz, 3 kHz Dev.) deviation, each voltage

of the AF section is measured by using an AF VTVM or osciloscope.

The level for each point is measured without removing parts or cutting

the pattern.

Q24

BPF

-9.83dBm

Q16

vco

Q17

RF(145.99MHz) AF(1kHz)IF(38.85MHz)

-35.83dBm -17.33dBm

-59.33dBm-62.50dBm -31.83dBm-47.83dBm

All voltage levels must be measured after setting the AF output volt-

age at 0.58V rms.

The RF and IF sections are measured by using a spectrum analyzer.

Each voltage of the AF section is measured by using an AF VTVM or

osciloscope.

The level for each point is measured without removing parts or cutting

the pattern.

AF(1kHz) RF(145.99MHz)

Transmitter Section

IC16

MIC

MIC AMP

9.74Vrms 0.84Vrms -18.68dBm 10.50dBm 4.17dBm 15.17dBm 11.00dBm 24.67dBm 20.83dBm 30.50dBm

BPF

ANTFILTER

Receiver Section

ANT SP

-53.00dBm 0.26Vrms 12.09mVrms 0.66Vrms

55

TH-K2AT/K2E/K2ET

BLOCK DIAGRAM

KIN0~3

KYO0~3

PTTI
KIN4

KYO1
KYO2

5T

Q27
2SK1830

WIDE/NARR

NAR

VR6

SW

VR5

SEG0~31
COM0~3

5C

IC1

VSS,DVSS,
AVSS,AVRL

LAMP

CLOCK
DATA
EEPCS
EEPDI

Q6

2SC5488

RF AMP

LPF

LMX2316TMX

PLL IC

VOXIN

IC8

INTUP
INTDW

LOOP
FILTER

MPU

PLLEN
PLLLD
CLOCK
DATA

MOD

VCC,DVCC
AVCC,AVRH
HST(VCC),V3RESET

TONE

D6

1SV305

D1, D2

1SV325

5C

SIGIN

BSFT

NOAA

BTEMP
DCDET

TCXO
X1

12.8MHz

NAR

X0
X1

Q3

2SK1830

SHIFT SW

SHIFT

Q1
2SC5066
(O)

5MS

Q52
RN1107

BEAT SHIFT

OSC

VR1

VR6

Q23
KTC4082

TRIPLER

5R

2nd Local

TONE

DTMF/BEEP

IC5
NJM2107F

HPF

5MV

D74,D75
DA221

LIMITTER

J3

PTT

LAMP

MONI

PTTE/RXD

D48,49
B30-2205-05

LCD ILLMI

X57-674 C/3

Q29,D22,D27
2SC4919
1SS361
RB706F-40

MIC AGC

MICM

D42,43,46
D44,47
B30-2205-05

KEY ILLMI

D24
MA742

VOX DET

IC16

NJM2904V

LIMITTER AMP
SPLATTER

FILTER

Q30

2SC4617(R)

VOX AMP

Q50

2SK1830
KEY ILLMI

SW

X57-674 B/3

Q51

RN4902

LCD ILLMI
SW

LCD

5MV

56

X57-674 A/3

D/A
DTMF/BEEP,TONE

PWM
BPF/APC

A/D
REM,SQ,SM,BATT

H/L
AFM,SPM,MICM,

KAPC,FINAL,CHARGE,
AFAMP,RXLED,BTDET,TXD
5MS,5R,5T,5C(SAVE),VOX,
KYO0~3,VUKEY

H/L
RXD,PTTE,PTTI,

ENCA,ENCB,
PWRSW,KIN0~4,TYPE

IC15

AT25160N

10SI27

EEPROM

IC10

S-80844

CNNBB85

INT

IC11
S-80930
CNNBG80

RESET

D40,41
B30-2156-05
B30-2157-05

5C

TX/RX LED

5M

Q47

RN1701

TX/BUSY
LED SW

5T

RXLED

Q2

RF AMP RF AMP

Q5
2SC54882SC5488

D8, D9 Q9
HSC277

TX/RX SW

BLOCK DIAGRAM

B

2SC5488
RF AMP

Q10

2SC4926YD

PRE-DRIVE

AMP

Q11 Q12

2SK2596

DRIVE AMP

TH-K2AT/K2E/K2ET

2SK3476

FINAL AMP

D10
XB15A709

ANT SW

LPF

ANT

Q4,D7

LIPPLE
FILTER

5C

38.4MHz

5R

Q22
RN2105

WIDE/NARR
SW

Q59
2SK1824

WXA SW

(Ktype only)

5R

IC3

TA31136FN

SQ,SM

IC17

NJM2902V
CT/DCS/WXA

FILTER

VR1
ENC

IC1
TCXO
Q4,5,6
D40,41

IC5
Q30

IC3,17
D9,14
Q16,17
Q22,23,24
Q59

Q9,10,13
D8,10
TH1
IC16
Q47

FM IC

CD1

5MS

5MV

450kHz

5R

(R)

D35

RB521S-30

PROTECT

D36

RB521S-30

PROTECT

Q15

2SC4617(R)

SW

Q13

2SK1830

SW

5R

2SK1830 TA7368F

AF MUTE SW

AFM AF AVR

IC6
D48,49
D42,43,46
D47,44

AF AMP

Q24

2SC5488

IF AMP

5R

LPF

DE-EMPH

5M

TH1
B57331V

2103J

TEMP DET

IC9
TK11250

CM

AVR

5.0V

IC12
TK11250

CUCB

AVR

5.0V

5T

XF1
MCF

38.85MHz

Q21
2SC4617

AF FILTER

5R

Q16
3SK318

Q14
RN4902

APC SW

APC KILL SW

IC2

NJM2904V
APC AMP

D18,D19 D20,D21
1SV305 1SV305

BPF/APC

VR

Q36
2SJ347

THERM DET

BTDET

Q35

2SK1830

DC-IN DET

Q37, Q38
2SB1184(Q,R)
2SC4617(R)

AF/LAMP
AVR

IC4

XC6202PB
52FR

AVR

11.5V

D14
MA2S111

DTMF/BEEP

B

Q58
2SK1830

BIAS SW

APC V

Q17

2SK1215

RF AMPBPF BPF

5R

IC6

AF AMP

SPM

Q33
2SB1184

(Q,R)

BATT

CHARGE

Q34
2SK1830

CHARGE SW

5C

CF1

5R

Q41
RN2105

5MS SW

Q57
RN2105

5C SW

5C

Q53
RN2701

5R SW
5MV SW

5R

Q55
CPH3317

5T SW

5T

FINAL

BPF/APC

5T

BPF/APC

Q56Q20
CPH3417
D26
1SS388

SP MUTE SW

Q31

2SK1830

D25
MA2S111

MUTE SW

D30

RB521S-30

PROTECT

CHARGE

D80

RB521S-30

PROTECT

D12,D13
HVC131

ANT SW

D17
HSM88AS

ANT SW

B

D33

RB051L-40

PROTECT

D32

RB051L-40

PROTECT

REM
/TXD

J4

CN2

-

T

+

BATT TERMINAL

7.5V Norminal
(6.0 - 9.0V)

DC IN

13.8V Norminal
(12.0 - 16.0V)

B

J2

57

TH-K2AT/K2E/K2ET

BC-21 (WALL CHARGER) / PB-43N (Ni-MH BATTERY PACK)

BC-21 External View

Photo is K type.

BC-21 Specifications

Rated output voltage......... DC 13.8V ±5%

Rated output current ......... 150mA

Charging time.................... Approx. 12 hours (PB-43N)

PB-43N External View

PB-43N Schematic diagram

Discharge terminal side

T

Thermister

(DTN-103F3H-SYS)

Breaker

(BBS70 A1N-01 70˚C)

Diode

(ERB83-004)

Breaker

(BBS80A2Y-01 80˚C)

(4N) (2N)

Thermister

(DTN-103F3H-SYS)

T

Rear charge terminal side

PB-43N Specifications

Voltage ..........................................7.2V (1.2V x 6)

Charging current............................1100mAh

Dimensions (Projections included) ...
Charger and charging time

KSC-24 (Rapid charger) .............Approx. 60 minutes

Weight...........................................210g

58W x 100.8H x 16.8D (mm)

58

TH-K2AT/K2E/K2ET

BT-14 (BATTERY CASE) / PG-4Y (PROGRAMMING INTERFACE CABLE) /

MCP-1A (MEMORY CONTROL PROGRAM)

BT-14 (6 AA/LR6) External View

PG-4Y External View

MCP-1A

• Available free for downloading from the Kenwood website:
http://www.kenwood.com/i/products/info/amateur.html

59

TH-K2AT/K2E/K2ET

SPECIFICATIONS

General TH-K2AT TH-K2E TH-K2ET

Market code K, K2 M, M2 E E3
Number of memory channels
Antenna impedance (Connector type) 50 Ω (SMA)

Operating Voltage
Grounding method Negative ground

Current

Usable temperature range
Frequency stability Within ±5 ppm (–20° C ~ 60° C)
Dimensions (WxHxDProjections not included)

weight

Transmission Mode F3E (FM) / F2D (FM)
Frequency range 144 ~ 148 MHz 136 ~ 174 MHz 144 ~ 146 MHz

Output Power

Modulation Reactance
Maximum frequency deviation ±5 kHz (FM) / ±2.5 kHz (NFM)
Squrious emissions –60 dB or less (H and M power), –50 dB or less (L power)
Microphone impedance 2 kΩ

Reception Mode F3E (FM) / F2D (FM)
Frequency range 136 ~ 174 MHz 144 ~ 146 MHz

Intermediate Frequency (IF)
Circuit type Double super - heterodyne
Sensitivity
Squelch Sensitivity 0.13 µVorless (within 2m amateur radio band)
Selectivity
Audio output (10% distortion) 400 mW or higher (7.2 V, 8 Ω load)

DC IN Jack DC 12.0 ~ 16.0 V (13.8 V nominal)
Battery terminal DC 6.0 ~ 9.0 V (7.2 V nominal)

Transmit with H, 13.8 V (DC IN) 1.8 A or less
Transmit with H, 7.2 V (PB-43N) 2.0 A or less
Transmit with M, 7.2 V (PB-43N) 1.5 A or less
Transmit with L, 7.2 V (PB-43N) 0.8 A or less
Receive (no signal) 100 mA or less
Battery Saver ON (Average) 30 mA or less

Transmitter

DC-IN jack (13.8 V) H: 5.0 W (approx.) M: 1.5 W (approx.) L: 0.5 W (approx.)
PB-43N (7.2 V) H: 5.0 W (approx.) M: 1.5 W (approx.) L: 0.5 W (approx.)
BT-14 (9.0 V) H: 3.5 W (approx.) M: 1.2 W (approx.) L: 0.3 W (approx.)

Receiver

Note: All specifications (General, Transmitter and Receiver) are guaranteed within the amateur radio band.

100 (50) + 9 special
function memories

–20° C ~ 60° C (–4° F ~ 140° F)
–10° C ~ 60° C (+14° F ~ 140° F) with PB-43N

58 x 110 x 28.4 mm/27/16"x46/16"x12/16" with PB-43N
58 x 110 x 29.6 mm/27/16"x46/16"x15/32" with BT-14

Approx. 320g/11.3 oz with PB-43N
Approx. 320g/11.3 oz with BT-14

1st IF : 38.85 MHz
2nd IF : 450kHz

FM (12 dB SINAD)
2m amateur radio band: 0.18 µVorless

–6 dB / 10 kHz or less
–40dB/28kHz or less (within 2m amateur radio band)

100 (50) + 8 special function memories

KENWOOD CORPORATION

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