Kenwood TH-K2 Service Manual

144MHz FM TRANSCEIVER

TH-K2AT/K2E/K2ET

SERVICE MANUAL

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

√

∫

Ω

∫

≈

≤

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).

) and remove two round nuts (c).

) from the case

) from the connector (CN2) of

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

cover (antenna terminal section).

) holding the shield

√

cover (final amplifier section).

board.

with a solder absorber.

) on the TX-RX PC

∫

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

)

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 (

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 (

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.)

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

). If there is any space between

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 (

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 (

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.

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

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

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

PTT switch

PTT PCB (C/3)

CN6

No clearance

CN7

Fig. 4

(3)Tighten one screw in the PTT PCB.

TH-K2AT/K2E/K2ET

LAMP

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.

(

)

Packing

Chassis

Packing

Chassis

)

Cautions for installing the chassis on the case assembly

(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

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

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.

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

FINAL

DRIVE

144.000~147.995MHz(K,K2)

136.000~173.995MHz(M,M2)

144.000~145.995MHz(E,E3)

1st MIX

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

MIX, IF,

DET

Tripler

x 3

PLL

VCO

38.4MHz

AMP

TCXO

MIC

AMP

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

Tuning voltage

PLL

LPF

VCO

RF AMP

Q17

D20D21

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

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

AFM

IC8

MPU

1st IF input (38.85MHz)

IC3

FM IC

2nd local OSC

(38.4MHz)

SMV

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

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

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

AF OUT

VR201

AF VOLUME

DTMF/BEEP

IC8

MPU

Q21

FILTER

IC6

AF AMP

REM

Q20

AF MUTE

SWITCH

SPG

REM/TXD

SPK

AFO

Fig. 4 AF amplifier

J4 SP JACK

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

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

VCO

RF AMP

D10,L19 D12,D13

ANT

RF AMP

LPF

ANT

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

Q55

–t

TH1

THERM

KAPC

BPF/APC

IC8

MPU

FINAL

Q58

D12

VGG

Q15

R72

R71

R70

Q13

Fig. 7 APC and Temperature protection circuit

VDD

APC AMP

AOUT

A–IN

A+IN

GND

IC2

BOUT

B–IN

B+IN

V+

Q14

TH-K2AT/K2E/K2ET

Fo/LD

PLL LD

IC8

MPU

IC1

PLL IC

R32

D16

C40

R35

102

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

5C 5/0V

5MS 5/0V

TCXO

VR1

TCXO

12.8MHz

5C 5/0V

CLOCK

DATA

Fo/LD

PLL

IC1

PLL IC

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

Ripple

D1,D2

SHIFT

Filter

OSC

MOD

Buff Amp

Amp

LV 1~5V

5C 5/0V

SHIFT

H/L

D8,D9

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

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

Q41 RN2105

5MS SW

Q57 RN2105

5C SW

Q53 RN2701

5R SW 5MV SW

Q55 CPH3317

5T SW

IC9 TK11250

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.

BATT TERMINAL

7.5V Norminal (6.0 - 9.0V)

Q33 2SB1184

(Q,R)

BATT

D31 DA221

CONSTANT CURRENT

CHARGE

Q34 2SK1830

CHARGE SW

D30

RB521S-30

PROTECT

CHARGE

D80

RB521S-30

PROTECT

D33

RB051L-40

PROTECT

D32

RB051L-40

PROTECT

DC IN

13.8V Norminal (12.0 - 16.0V)

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.

IC11

IN OUT

IC10

IN OUT INT

BATT

D35

IC9

IN OUT

AVR

R244

C303

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

5V5M

5VRESET

5VINT

Power

OFF

R243

C307

L63

IC15

EEPROM

IC8

MPU

RESET

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

LAMP

RX LED

AF AMP

D33

Q38

Q37

D48

D42

D44

D49

D43

D47

Q50

D41

BUSY LED

TX LED

D40

R227

R226

Fig. 13 LED drive circuit

IC8

MPU

5MS

Q41

5MS

5C (SAVE)

IC8

MPU

Q57

Fig. 12 Battery save circuit

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

F321

LAMP

VFO654

MONI

MR987

SET

CALL

∗

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

PTTI14PTTE13ENCB36ENCA

S7POWER

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

PTTI14PTTE13ENCB36ENCA

ROTARY

ENCODER

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.

TCXO

VCO

VR6

MOD

VR5

1 MIC

AMP

LPF

AMP

IC16

■ 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

111

NOAA K, K2 types only

CTCSS/DCS

IC17D24Q30 IC3

FILTER

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

SP JACK

PTT MIC

REM/TXD

5MS

SPG

SPK AFO

IC5

HPF

5MC

+ –

POUT

IC6

AF AMP

MIC

REM

IC8

MPU

PTTE

TXD RXD

12 11

Fig. 16 Serial control

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

I/O Function

BPF tuning voltage output, APC voltage

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/

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

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

Audio mute when off

On when wide is selected

Mutes when ON

Off when the speaker outputs audio

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

Frequency shift

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

DC IN

Key backlight illumination

LCD backlight illumination

Key matrix

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

Scandinavia

PX (Far East, Hawaii)

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

New

parts

USA

England

Australia

Canada

Europe

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

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

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)

+ 44 hidden pages