Kenwood TH-K20A, TH-K20E Service manual

144MHz FM TRANSCEIVER

TH-K20A/K20E

SERVICE MANUAL

When performing the TH-K20 adjustment, a personal
computer, programming interface and tuning software are
required.

© 2009-1 PRINTED IN JAPAN

© 2011-11 PRINTED IN JAPAN
B51-8281-00 (N) 1219

B51-8997-00 (Y) 203

CONTENTS

Helical antenna
M: (T90-1018-35)
K,E: (T90-1044-15)

Knob (Volume)
(K29-9503-03)

Knob(Encoder)
(K29-9504-03)

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

CLONE MODE .............................................3

CIRCUIT DESCRIPTION .............................4

SEMICONDUCTOR DATA ...........................7

COMPONENTS DESCRIPTION ..................9

PARTS LIST ...............................................10

EXPLODED VIEW ......................................16

PACKING ...................................................17

ADJUSTMENT ........................................... 18

PC BOARD

TX-RX UNIT (X57-821X-XX) ...................22

SCHEMATIC DIAGRAM ............................26

BLOCK DIAGRAM .....................................30

LEVEL DIAGRAM ......................................32

OPTIONAL ACCESSORIES

BT-16 (Battery Case) .............................33

EMC-11

(Clip Microphone with Earphone)

.. 33

Key top (16 keys)
(K29-9502-02)

Plastic cabinet assy
(A02-4158-03)

his product complies with the RoHS directive for the European market.

PB-46L (Li-ion Battery Pack) ................33

KVC-22

(DC Vehicular Chager Adapter)

..33

SPECIFICATIONS ...................................... 35

This product uses Lead Free solder

.T

TH-K20A/K20E

Document Copyrights

Copyright 2011 by JVC KENWOOD Corporation. All

rights reserved.

No part of this manual may be reproduced, translated,
distributed, or transmitted in any form or by any means,
electronic, mechanical, photocopying, recording, or other-
wise, for any purpose without the prior written permission of
JVC KENWOOD Corporation.

DISASSEMBLY FOR REPAIR

1. Separating the Case Assembly from the

Chassis

1. Remove the two knobs (a).

2. Remove the two screws (b).

3. Pull off the cap from SP/MIC jack (c).

4. Expand the right and left sides of the bottom of the case

assembly, Iift the chassis, and remove it from the case

assembly (d).

Disclaimer

While every precaution has been taken in the preparation
of this manual, JVC KENWOOD Corporation assumes no
responsibility for errors or omissions. Neither is any liability
assumed for damages resulting from the use of the informa-
tion contained herein. JVC KENWOOD Corporation reserves
the right to make changes to any products herein at any time
for improvement purposes.

Black

e

Red

b

b

c

d

5. Taking care not to cut the speaker lead wire with connec-
tor (e), open the chassis and case assembly.

a

a

2. Removing the TX-RX unit from the

Chassis

1. Remove the packing (f).

2. Remove the 13 screws (g).

3. Remove the packing (h) and two hexagon nuts (i).

4. Remove the solder from the antenna terminal using a
soldering iron then lift the unit off (j).

Note:

When reassembling the unit in the chassis, be sure to

solder the antenna terminal.

2

TH-K20A/K20E

DISASSEMBLY FOR REPAIR

g

j

Antenna terminal

h

i

i

3. Removing the Rear Panel

1. Raise the rear panel on the chassis (k).

k

f

CLONE MODE

Programming data can be transferred from one trans-
ceiver to another by connecting them via their SP/MIC con-
nectors.

Cloning can copy the transceiver data to another trans-
ceiver even without the use of a personal computer.

The following data cannot be cloned.

• Tuning data

1. Connect the cloning cable (part No. E30-3410-05) to the

SP/MIC connectors on the source and target transceiv-

ers.

2. Turn the source and target transceiver power OFF.

3. Turn the source transceiver power ON while pressing the

[CALL] keys, to enter clone mode. ”CLONE” appears on

the display.

4. Turn the target transceiver power ON.

5. Press the [CALL] key on the source transceiver while

”SEND” is displayed.
The data of the source is sent to the target.
While the target is receiving data, ”RECV” appears on the

display.
When cloning is completed, the ”END” appears on the

source and target display.

6. Turn the source and target transceiver power OFF.

Note:

• The Model name and Market codes must be the same in
order to clone the transceiver.

• If a data transfer error occurs during Clone mode, ”ER-
ROR” appears on the target transceiver.

When you turn the target transceiver power ON again

while ”ERROR” is displayed, the target transceiver
performs a full reset. At this time, the source transceiver
continues to send data.

Cloning cable
(E30-3410-05)

3

TH-K20A/K20E

CIRCUIT DESCRIPTION

1. Frequency Confi guration

The receiver utilizes double conversion. The first IF is

38.85MHz and the second IF is 450kHz. The fi rst Local os-
cillator is supplied from the PLL circuit.

RX: 136~173.995MHz(K,E,M)

TX: 136~173.995MHz(M)

144~147.995MHz(K)

ANT

144~145.995MHz(E)

1st MIX MCF SP

ANT

SW

TX: 136~173.995MHz(M)
144~147.995MHz(K)
144~145.995MHz(E)

TX

AMP

RF

AMP

38.85MHz

1st Lo:

174.85~

212.845MHz

T/R

SW

Fig. 1 Frequency confi guration

2. Receiver System

The receiver system is shown in Figure 2.

2-1. RF Amplifi er Circuit

The signal coming from the antenna passes through
the transmit/receive switching diode circuit (D101,
D102,D103,D104 and D105) and a BPF (L213,L214), and is
then amplifi ed by the RF amplifi er (Q204).

The resulting signal passes through a BPF (L209,L211
and L217) and goes to the mixer. These BPFs are adjusted
by variable capacitors (D200,D201 and D204). The input
voltage to the variable capacitor is a regulated voltage out-
put from the DAC (IC300).

2-2. First Mixer

The signal from the front end is mixed with the fi rst local
oscillator signal generated in the PLL circuit by Q203 to pro-
duce a fi rst IF frequency of 38.85 MHz.

The resulting signal passes through the XF200 MCF to
cut the adjacent spurious and provide the optimum charac-
teristics, such as adjacent frequency selectivity.

CF

450kHz

IF

SYSTEM

38.4MHz

X2

doubler

RF

AMP

The PLL circuit in the transmitter generates the neces-

sary frequencies.

AF
filter

TCXO 19.2MHz

PLL

VCO

Item

Nominal center frequency (fo)

Pass bandwidth

Attenuation bandwidth

Ultimate attenuation 70dB or more (fo –900 kHz)

Spurious response

Insertion loss

Terminating impedanc 610:// 3pF

AF

AMP

MIC

MIC

AMP

Rating

38.850MHz

±5.0kHz or more at 3dB

±25.0kHz or less at 45dB

40dB or more (fo +1MHz)

1dB or lessRipple

5dB or less

MCF (L71-0669-05) characteristics (TX-RX unit XF200)

Item

Nominal center frequency (fo)

3dB bandwidth

50dB bandwidth

Guaranteed attenuation

Insertion loss

I/O matching impedance

450kHz

±4.5kHz or more

±11.0kHz or less

2dB or less

50dB or more (fo ±100kHz)

6dB or less

1.5k:

Rating

3.0kHz)± of(Ripple

Ceramic filter (L72-1042-05) characteristics (TX-RX unit CF200)

CF200

ANT

ANT

SW

BPF

BPF

Q204

RF AMP XF200

BPF

BPF 1st Local

Q203

1st MIX

MCF

Q202

IF AMP

IC200

IF,MIX,DET

2nd Local

Q201

doubler

IC303

filter

AF

TCXO

19.2MHz

X1

VR300

IC307

AF PA

SP

Fig. 2 Receiver system

4

TH-K20A/K20E

CIRCUIT DESCRIPTION

2-3. IF Amplifi er Circuit

The fi rst IF signal is passed through a four-pole mono-
lithic crystal fi lter (XF200) to remove the adjacent channel
signal.

The fi ltered fi rst IF signal is amplifi ed by the fi rst IF ampli-
fi er (Q202) and then applied to the lF system IC (IC200).

The IF system IC provides a second mixer, second local
oscillator, limiting amplifier, quadrature detector and RSSI
(Received Signal Strength Indicator).The second mixer
mixes the fi rst IF signal with the 38.4MHz of the second lo-
cal oscillator output (TCXO: X1) and produces the second IF
signal of 450kHz.

The second IF signal is passed through the ceramic fi lter
(CF200) to remove the adjacent channel signal. The fi ltered
second IF signal is amplified by the limiting amplifier and
demodulated by the quadrature detector with the ceramic
discriminator (CD200).The demodulated signal is routed to
the audio circuit.

2-4. Audio Amplifi er Circuit

The demodulated signal from IC200 is amplified by
IC303, IC302 and goes to AF amplifi er through IC307.

The signal then goes through a volume control (VR300),
and is routed to an audio power amplifi er (IC307) where it is
amplifi ed and output to the speaker.

To output sounds from the speaker, IC401 sends a high
signal to the SPMUT line and turns IC401 on through Q301,
Q302, Q303, Q305 and Q306.

3. Transmitter System

3-1. Microphone Amplifi er Circuit

The signal from microphone amplifi ed by IC301 and goes

through mute switch (IC300).

IC304 is composed of high-pass fi lter, low-pass fi lter and

pre-emphasis/IDC circuit.

The output signal from the DAC IC (IC300) goes to the

VCO modulation input.

MOD

Q3,D4

VCO

X1

TCXO

MIC

IC301

MIC

AMP

MIC

AMP/LIM

IC304

IC300

DAC

LSDO

Fig. 3 Microphone amplifi er circuit

3-2. Driver and Final Amplifi er Circuit

The signal from the T/R switch (D8 is on) is amplifi ed by

the pre-drive amplifi er (Q101) to 30mW.

The output of the pre-drive amplifi er is amplifi ed by the

drive amplifi er (Q102) and the RF fi nal amplifi er (Q103) to

5.5W (1W when the power is low).
The drive amplifi er and the RF fi nal amplifi er consist of

two MOS FET stages.

The output of the RF final amplifier is then passed

through the harmonic fi lter (LPF) and antenna switch (D101
and D102) and is applied to the antenna terminal.

From

T/R SW

(D8)

+B

Q101

Pre-DRIVE

R125

R127

R129

CURDET

Q102

DRIVE AMP

VDD

Q103

FINAL AMP

Fig. 4 Drive and fi nal amplifi er circuit

ANT

D101,102

ANT
SW

VG

POWC

5

TH-K20A/K20E

CIRCUIT DESCRIPTION

4. Frequency Synthesizer Circuit

4-1. Frequency Synthesizer

The frequency synthesizer consists of the TCXO (X1),

VCO, PLL IC (IC1) and buffer amplifi ers.

The TCXO generates 19.2MHz. The frequency stability is

5.0 ppm within the temperature range of –30 to +60°C.
The frequency tuning and modulation of the TCXO are

done to apply a voltage to pin 1 of the TCXO. The output of
the TCXO is applied to pin 1 of the PLL IC.

The VCO consists of 1VCO and covers a dual range of

the 144.00~174.00MHz and the 182.85~212.85MHz. The
VCO generates 182.85~212.85MHz for providing to the fi rst
local signal in receive.

The PLL IC consists of a prescaler, reference divider,

phase comparator, charge pump (The frequency step of the
PLL circuit is 5 or 6.25 kHz).

PLL data is output from DAT (pin 19), CLK (pin 18) and

PLDL (pin 20) of the MCU (IC401). The data are input to the
PLL IC when the channel is changed or when transmission
is changed to reception and vice versa. A PLL lock condition
is always monitored by the pin 22 (PLUL) of the MCU. When
the PLL is unlocked, the PLUL goes low.

SHIFT
(TX: Low)

PLLD

Q3

VCO

LPF

IC401

MCU

Q4

BUFF

AMP

CV

Q6

INV

DAT,CLK,PLLE

5

14

LD

Fig. 5 PLL block diagram

Q5

RF

AMP

8

IC1

1

PLL

TXRX

SW

X1

TCXO

D7

LSDO

D8

TXRX

SW

To mixer

To
Pre-AMP

Realign the transceiver after replacing the EEPROM.

6. Signaling Circuit

6-1. Encode

CTCSS/ DCS

■

The CTCSS and DCS signals are output from pin 49
(LSDO) of the MCU (IC401). The signal passes through a
low-pass CR fi lter. The signal is mixed with the audio signal
and goes to the VCO and TCXO (X1) modulation input after
signal processing in the DAC IC (IC300).

DTMF

■

The DTMF signal is output from pin 50 (HSDO) of the
MCU.

The signal passes through a low-pass CR fi lter. TX devia-
tion making an adjustment by MCU is applied to the DAC IC
(IC300). The signal is mixed with the audio signal and goes
to the VCO and TCXO.

6-2. Decode

CTCSS/DCS

■

The output signal from IF IC (IC200) enters the MCU
(IC401) through IC300. IC401 determines whether the
CTCSS or DCS matches the preset value, and controls the
SPMUT and the speaker output sounds according to the
squelch results.

CTCSS/DCS

IC401

MCU

LSDO

HSDO

4

3

IC300

DAC

9

6

12

FREQ

8

7

MOD

TCXO

VCO

5. Control Circuit

The control consists of the MCU (IC401) and its peripheral

circuits. It controls the TX-RX unit. IC401 mainly performs
the following;

1) Switching between transmission and reception by PTT
signal input.

2) Reading channel information, frequency, and program
data from the memory circuit.

3) Sending frequency program data to the PLL.

4) Controlling squelch on/off via the DC voltage from the
squelch circuit.

5) Controlling the audio mute circuit via the decode data
input.

6) Transmitting tone and encode data.

7) Sending display data to the LCD assembly.

Note:

The EEPROM stores tuning data (Deviation, Squelch,

etc.).

6

24

BEEP

AF POWER
AMP

Fig. 6 Encode

7. Power Supply

There are fi ve 5V power supplies for the MCU:
5M is always output while the power is on.
5C is a common 5V and is output when SAVE is not set

to ON.

5R is 5V for reception and output during reception.
5T is 5V for transmission and output during transmission.
5MS is 5V for the SP/MIC connector and the DAC IC

(IC300).

TH-K20A/K20E

SEMICONDUCTOR DATA

MCU: R5F2L3ACCKEKA (TX-RX unit IC401

Pin No. Port Name I/O Function

1 KEYIT I Type detection

2 KEYIS I Type detection

3 HSDO O DTMF/BEEP/1750Hz tone output

4 LSDO O CTCSS/DCS tone output

5 WKUPO - Ground

6 VREF - Reference voltage input

7 MODE - MCU mode select

8 XCIN - Not used (Pull-up)

9 XCOUT - Not used

10 RESET I MCU reset

11 XOUT O 11.0592MHz MCU clock output

12 VSS - Ground

13 XIN I 11.0592MHz clock input for MCU

14 VCC - 5V power supply (5M)

15 BSFT O Beat shift control

16 INPTT I

17 5RC O

18,19 ENC2-ENC1 I Encoder input 2,1

20 RxD I Serial data input from PC

21 TxD O Serial data input to PC

22 W/N O

23 PLLE O

24 PLPS O

25 PLLD I

26 EXPTT I

27 LAMP O

28 NC O Not used

29 E2PCS O

30 E2PIN I Data input from EEPROM

31-34 COM0-COM3 O

35-66 SEG0-SEG31 O

67 LEDR O

68 LEDG O

69 5VC O

70 5MSC O

71 SPM O

INT PTT switch input
L: Active
5R RX power switch control
L: Active

Wide/Narrow control
H: Narrow
PLL-IC enable
H: Active
PLL-IC save control
L: Save ON
PLL unlock detect
L: Unlock
EXT-PTT input
L: Active
BacKlight LED control
H: Lights

EEPROM chip select
L: Active

LCD common output
H: Active
LCD segment output
H: Active
TX LED (Red) control
H: Lights
BUSY LED (Green) control
H: Lights
5V MIC AMP power switch control
L: Active
5MS main power switch control
L: Active
Speaker mute control
L: Mute

)

Pin No. Port Name I/O Function

72 MONI I

73 CLK O Common serial clock output

74 DATA O Common serial data output

75 5CC O

76 5TC O

77 VOLCS O

78 VDCSW O

79 CURRENT I TX current detect

80 VOX I VOX level detect

81 REM I

82 BATT I Battery voltage detection

83 THERM I Temperture detect

84 RSSI I RSSI level detect

85 SQL I Squelch level detect

86 LSDI I CTCSS/DCS tone detect

87 CVDET I VCO controle voltage detect

88-90

91-93 VL1-VL3 - LCD drive power supply

94 SHIFT O

95 KEYO1 O Key matrix output 1

96 VL4 - LCD drive power supply

97-100 KEYI1-KEYI4 I Key matrix input 1-4

KEYO4-
KEYO2

[MONI] key switch input
L: Active

5C Common power switch control
L: Active
5T TX power switch control
L: Active
DAC-IC chip select
L: Active
Voltage discharge control
H: Active

Remote control microphone key
detect

O Key matrix output 4-2

VCO TX/RX control
H: TX

7

TH-K20A/K20E

SEMICONDUCTOR DATA

PLL IC: MB15E03SL-E1 (TX-RX unit IC1)

Pin No. Port Name I/O Function

1 OSCIN I

2 OSCOUT O Oscillator output

3VP -

4 VCC - Power supply voltage (3.0V)

5 DO O Charge pump output

6 GND - Ground

7 XFIN I

8 FIN I Prescaler input

9 ClOCK I

1 0 D ATA I

11 LE I Load enable signal input

12 PS I

13 ZC I

14 LD/FOUT O Lock detect signal output

15

16

PO



RO



Programmable reference divider
input

Power supply voltage input for the
charge pump

Prescaler complementary input
which should be grounded via a
capacitor

Clock input for the 19-bit shift reg-
ister
Serial data input using binary
code

Power saving mode control
This pin must be set at “L” at
Power-ON.
Forced high-impedance control
for the charge pump

Phase comparator N-channel
open drain output for an external
charge pump (Not use)
Phase comparator CMOS output
for an external charge pump (Not
use)

FM IC: TA31136FNG (TX-RX unit IC200)

Pin No. Port Name I/O Function

1 OSCIN I 2nd Local oscillator input

2 OSCOUT O 2nd Local oscillator output

3 MIXOUT O MIX output

4 VCC - Power supply (5.0V)

5 IFIN I 2nd IF input and decoupling

6 DEC - 2nd IF input and decoupling

7 FILOUT O INVERTER AMP output

8 FILIN I INVERTER AMP input

9 AFOUT O Demodulate signal output

10 QUAD I

11 IFOUT O Output terminal of IF AMP

12 RSSI O This terminal outputs DC

13 NOISEDET - level according to input (Not use)

14 NOISEREC - signal level to IF AMP

15 GND - Ground

16 MIXIN I 1st IF signal input

Phase shift signal input of FM
demodulator

D/A Converter IC: R2A20178NP (TX-RX unit IC300)

Pin No. Port Name I/O Function

1 Vin2 I FROM AF fi lter signal input

2 VDD - Power supply voltage (5.0V)

3 LD I Load enable signal input

4 CLK I Control data input

5 DI I Control clock input

6 Vin3 I

7 Vout3 O Load enable signal input

8 Vout4 O Tone deviation adjust

9 Vin4 I Tone signal input

10 Vin5 I Connect to ground

11 Vout5 O VCO assist voltage adjust

12 Vout6 O TCXO frequency adjust

13 Vin6 I Connect to ground

14 VDAREF1 -

15 VDAREF2 -

16 /RESET I Reset

17 GND - Ground

18 Vin7 I Connect to ground

19 Vout7 O RX BPF tuning adjust

20 Vout8 O TX power adjust

21 Vin8 I Connect to ground

22 Vin1 I From MIC output

23 Vout1 O MIC level contorol and mute

24 Vout2 O RX AF mute control

From MIC AMP and limiter signal
input

Reference voltage 1 for DAC
(1.8V)
Reference voltage 1 for DAC
(5.0V)

8

TH-K20A/K20E

COMPONENTS DESCRIPTION

TX-RX unit (X57-821X-XX)

Ref. No. Use/Function

IC1 PLL system Frequency control

IC200 FM IF system

IC300 D/A converter

IC301 OP AMP

IC302 OP AMP Detect AF fi lter

IC303 OP AMP CTCSS/DCS fi lter

IC304 OP AMP MIC amolifi er/IDC

IC305

IC306

IC307

IC308

IC400 EEPROM Tuning data/Memory data

IC401 MCU

Q1

Q2 Ripple fi lter for VCO power supply

Q3 Oscillator TX/RX VCO

Q4 Buffer amplifi er for VCO output

Q5 RF amplifi er for VCO output

Q6 Logic invert for unlock signal

Q7

Q101

Q102 Drive amplifi er

Q103 Final amplifi er 5.5W RF power

Q104

Q200

Q201 Doubler 2nd Lo: 38.4MHz

Q202 1st IF amplifi er 1st IF: 38.85MHz

Q203 1st mixer

Q204 RF amplifi er RX 1st amplifi re

Q300

Q301

Q302

Q303

Voltage
detector/3.3V
Voltage
regulator/5.0V
AF power ampli-
fi e r
Voltage
regulator/5.0V

VCO shift control
switch

Power supply
(3.0V)

Pre drive amplifi er

Voltage dis-
charge switch
Wide/Narrow
switch

Power supply
(5.0V) switch
SP mute control
switch
SP mute control
switch
Speaker mute
switch

Operation/Condition/Compatibility

2nd mixer, IF amplifi er, FM
detector
AF mute/MOD level and fre-
quency adjust

1.8V reference voltage/MIC
amolifi er

MCU reset

5M/5MS power supply

Speaker output

5C/5T/5R power supply

TX: ON

for PLL IC

for FET bias voltage.
Active ON (VDCSW: H)
for ceramic fi lter selector
Wide: ON (W/L: L)

Active ON (5VC: L)

Active ON (SM: H)

for pop-noise Active ON

for AF signal line Active ON

Ref. No. Use/Function

Q304

Q305

Q306

Q307

Q308

Q400 Beat shift switch Active ON (BSFT: H)

Q401

Q402

Q403 Busy LED switch Active ON (LEDG: H)

Q404 TX LED switch Active ON (LEDR: H)

D1,D2

D3 RF switch

D4 VCO modulation for frequency modulation

D5

D6 Speed up for ripple fi lter

D7 RF switch for TX signal TX: ON

D8 RF switch for RX signal

D9, D10 Speed up for ripple fi lter

D11 Speed up for VCO shift control line

D101-104 Antenna switch TX: ON

D200, D201

D203

D300 VOX signal detect

D301

D302

D304

D401

D404-411

D414, D415

D416-425

D426 Busy LED Busy: light

D427 TX LED TX: light

Power supply
(5MS) switch
Speaker mute
switch
IC power supply
switch
Power supply
(5R) switch
Power supply
(5T) switch

Backlight LED
switch
Backlight control
switch

VCO frequency
control

Assist frequency
control

Band-pass fi lter
tuning
Band-pass fi lter
tuning

Reverse connec-
tion protection
Reverse current
prevention
Reverse current
prevention
Over voltage limit-
ter
Reverse current
prevention
LCD backlight
LED
Key backlight
LED

Operation/Condition/Compatibility

Active ON (5MSC: L)

for AF signal line Active ON

for AF power IC Active ON

Active ON (5RC: L)

Active ON (5TC: L)

Active ON

Active ON (LAMP: H)

for frequency range change
TX: ON

VHF band for receiver

VHF band for receiver

Battry terminal

for IC306 input

for IC308 input

3.6V zener diode

Key matrix

9

TH-K20A/K20E



C C 4 5 T H 1 H 2 2 0 J

1 2 3 4 5 6

1 = Type ... ceramic, electrolytic, etc. 4 = Voltage rating

2 = Shape ... round, square, etc. 5 = Value

3 = Temp. coefficient 6 = Tolerance

฀฀

1st Word C L P R S T U

Color* Black Red Orange Yellow Green Blue Violet

ppm/°C 0 –80 –150 –220 –330 –470 –750

PARTS LIST

CC45

Color*

2nd Word G H J K L

ppm/°C ±30 ±60 ±120 ±250 ±500

Example : CC45TH = –470±60ppm/°C

฀฀

010 = 1pF 2 2 0 = 22pF

100 = 10pF

101 = 100pF Multiplier

102 = 1000pF = 0.001µF 2nd number

103 = 0.01µF 1st number

฀฀฀฀

Code C D G J K M X Z P No code

(%) ±0.25 ±0.5 ±2 ±5 ±10 ±20

–20 –20 –0 Less than 4.7µF : –10~+75

฀฀

2nd word

1st word

0 1.0 1.25 1.6 2.0 2.5 3.15 4.0 5.0 6.3 8.0 –

1 10 12.5 16 20 25 31.5 40 50 63 80 35

2 100 125 160 200 250 315 400 500 630 800 –

3 1000 1250 1600 2000 2500 2150 4000 5000 6300 8000 –

฀฀

(EX) C C 7 3 F S L 1 H 0 0 0 J Refer to the table above.

1 2 3 4 5 6 7 1 = Type

(Chip) (CH, RH, UJ, SL) 2 = Shape

3 = Dimension

(EX) C K 7 3 F F 1 H 0 0 0 Z 4 = Temp. coefficient

1 2 3 4 5 6 7 5 = Voltage rating

(Chip) (B, F) 6 = Value

7 = Tolerance

A B C D E F G H J K V



฀฀฀

(EX) R D 7 3 E B 2 B 0 0 0 J

1 2 3 4 5 6 7

(Chip) (B, F)

฀฀฀฀

(EX) R D 1 4 B B 2 C 0 0 0 J

1 2 3 4 5 6 7

1 = Type 5 = Rating wattage

2 = Shape 6 = Value

3 = Dimension 7 = Tolerance

4 = Temp. coefficient

+40 +80 +100 More than 10µF : –10~+50

฀

Chip capacitor

Code L W T

Empty 5.6±0.5 5.0±0.5 Less than 2.0

A 4.5±0.5 3.2±0.4 Less than 2.0

B 4.5±0.5 2.0±0.3 Less than 2.0

C 4.5±0.5 1.25±0.2 Less than 1.25

D 3.2±0.4 2.5±0.3 Less than 1.5

E 3.2±0.2 1.6±0.2 Less than 1.25

F 2.0±0.3 1.25±0.2 Less than 1.25

G 1.6±0.2 0.8±0.2 Less than 1.0

H 1.0±0.05 0.5±0.05 0.5±0.05

Chip resistor

Code L W T

E 3.2±0.2 1.6±0.2 1.0

F 2.0±0.3 1.25±0.2 1.0

G 1.6±0.2 0.8±0.2 0.5±0.1

H 1.0±0.05 0.5±0.05 0.35±0.05

฀฀

Code Wattage Code Wattage Code Wattage

1J 1/16W 2C 1/6W 3A 1W

2A 1/10W 2E 1/4W 3D 2W

2B 1/8W 2H 1/2W

฀฀

Code B C D F G

(pF) ±0.1 ±0.25 ±0.5 ±1 ±2

L

T

W

10

PARTS LIST

TH-K20A/K20E

New Parts.

✽

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.

Ref. No.

indicates safety critical components.

New

Address

Parts No. Description

parts

TH-K20A/K20E TX-RX UNIT (X57-821X-XX) 0-11: K 0-20: M 2-71: E

1 1A ✽ A02-4158-03 PLASTIC CABINET ASSY
2 3A
3 3B

4 3B
6 1A
7 2B B11-1892-03 ILLUMINATION GUIDE (TX/BUSY)
8 1A
9 1D

11 1D
12 1D
13 1D
14 1D

15 1D
16 1D
18 1D

19 2B
21 2A
23 1B
24 2A

26 3B G01-4571-04 COIL SPRING
27 2A G11-4437-04 SHEET (Q103-CHASSIS)
29 3B
31 3A G13-2368-04 CUSHION (BATTERY)
32 2A G53-1867-13 PACKING (CHASSIS)

33 2B
34 2A
36 3B

37 2D
38 1C
41 3D

42 2C J29-0756-05 BELT CLIP ACCESSORY

46 3A K29-9491-03 LEVER KNOB
47 1A
48 1B
49 1B
51 1A

52 1A

A 2B N09-2438-05 BINDING HEAD SCREW (ANT)
B 3A N80-2608-43 PAN HEAD TAPTITE SCREW
C

54 1B T07-0787-05 SPEAKER
56 2C T90-1018-35
57 2C T90-1044-15

58 1C W08-1246-15 AC ADAPTER ACCESSORY M,E
59 1C W08-1247-15 AC ADAPTER ACCESSORY K
61 2D
62 1C W09-1073-25 BATTERY ASSY ACCESSORY

A10-4158-01 CHASSIS

✽

A82-0085-02 REAR PANEL

✽

B09-0749-03 CAP (EXT SP/MIC)

✽

B10-6009-03 FRONT GLASS

✽

B11-1897-02 ILLUMINATION GUIDE (16KEY)

✽

B62-2365-00

✽

B62-2369-00

✽

B62-2370-00

✽

B62-2371-00

✽

B62-2372-00

✽

B62-2373-00

✽

B62-2374-00

✽

B62-2375-00

✽

E04-0488-05

✽

E23-1373-04 TERMINAL

✽

E37-1543-05

✽

E72-0437-03 TERMINAL BLOCK

✽

G13-2366-04 CUSHION (TERMINAL)

✽

G53-1880-02 PACKING (TOP)

✽

G53-1881-04 PACKING (ECM)

✽

G53-1882-03 PACKING (SP/MIC)

✽

H12-4324-02 PACKING FIXTURE K

✽

H12-4326-02 PACKING FIXTURE K

✽

H52-2486-02 ITEM CARTON CASE K

✽

K29-9502-02 KEY TOP

✽

K29-9503-03 KNOB (VOL/PSW)

✽

K29-9504-03 KNOB (ENCODER)

✽

K29-9505-03 KNOB (PTT)

✽

K29-9506-03 BUTTON KNOB (SIDE)

✽

1A,2A,2B

N83-2005-48 PAN HEAD TAPTITE SCREW

W08-1249-35 CHARGER ACCESSORY

✽

X57-8210-12 TX-RX UNIT (FOR SERVICE) K

✽

X57-8210-21 TX-RX UNIT (FOR SERVICE) M

✽

X57-8212-72 TX-RX UNIT (FOR SERVICE) E

✽

INSTRUCTION MANUAL ACCESSORY

INSTRUCTION MANUAL ACCESSORY
INSTRUCTION MANUAL ACCESSORY
INSTRUCTION MANUAL ACCESSORY
INSTRUCTION MANUAL ACCESSORY

INSTRUCTION MANUAL ACCESSORY
INSTRUCTION MANUAL ACCESSORY
INSTRUCTION MANUAL ACCESSORY

RF COAXIAL RECEPTACLE (SMA)

LEAD WIRE WITH CONNECTOR (SP)

HELICAL ANTENNA ACCESSORY
HELICAL ANTENNA ACCESSORY

(X57)

K,E
K,E
E
E

E
E

M

M
K,E

Desti-
nation

L : Scandinavia K : USA P : Canada
Y : PX (Far East, Hawaii) T : England E : Europe
C : China X : Australia M : Other Areas

TX-RX UNIT (X57-821X-XX)

Ref. No.

101 3A
102 3A
D414,415 B30-2261-05 LED (YELLOW/LCD)
D416-425 B30-2337-05 LED (YELLOW/KEY))
D426 B30-1782-05 LED (GREEN/BUSY)

D427 B30-1779-05 LED (RED/TX)
103 2A

C1 CK73HB1A184K CHIP C 0.18UF K
C2 CK73HB1C333K CHIP C 0.033UF K
C3 CK73HB1A105K CHIP C 1.0UF K
C4 CK73HB1E223K CHIP C 0.022UF K
C5 CC73HCH1H390G CHIP C 39PF G

C6 CK73HB1E223K CHIP C 0.022UF K
C7 CC73HCH1H0R5B CHIP C 0.5PF B
C8 CK73HB1H102K CHIP C 1000PF K
C9 CK73HB1A105K CHIP C 1.0UF K
C10 CC73HCH1H080B CHIP C 8.0PF B

C11 CK73HB1H102K CHIP C 1000PF K
C12 CS77CP0J010M CHIP TNTL 1.0UF 6.3WV
C13 CK73HB1H102K CHIP C 1000PF K
C15 CC73HCH1H100B CHIP C 10PF B
C16 CS77CA1A220M CHIP TNTL 22UF 10WV

C17 CC73HCH1H090B CHIP C 9.0PF B
C18 CK73HB1H102K CHIP C 1000PF K
C19 CK73HB1E103K CHIP C 0.010UF K
C20 ,21 CK73HB1H102K CHIP C 1000PF K
C22 CC73GCH1H0R5B CHIP C 0.5PF B

C23 CK73HB1H102K CHIP C 1000PF K
C25 CK73HB1H102K CHIP C 1000PF K
C26 CC73HCH1H150J CHIP C 15PF J
C27 CC73HCH1H470G CHIP C 47PF G
C28 CC73HCH1H090B CHIP C 9.0PF B

C29 CC73HCH1H150J CHIP C 15PF J
C31 CC73HCH1H120J CHIP C 12PF J
C32 ,33 CK73HB1H102K CHIP C 1000PF K
C34 CC73HCH1H150J CHIP C 15PF J
C36 CK73HB1H102K CHIP C 1000PF K

C37 CK73GB1E154K CHIP C 0.15UF K
C38 CS77CA1A6R8M CHIP TNTL 6.8UF 10WV
C39 CS77CA1DR68M CHIP TNTL 0.68UF 20WV
C41 CK73HB1E103K CHIP C 0.010UF K
C42 CK73HB1H102K CHIP C 1000PF K

C43 CK73HB1E103K CHIP C 0.010UF K
C44 CK73HB1H102K CHIP C 1000PF K
C45 CC73HCH1H220J CHIP C 22PF J
C46 CK73HB1H102K CHIP C 1000PF K
C47 CC73HCH1H040B CHIP C 4.0PF B

C48 CK73HB1E103K CHIP C 0.010UF K
C49 CK73HB1H102K CHIP C 1000PF K
C50 CC73HCH1H050C CHIP C 5.0PF C
C51 CC73GCH1H220J CHIP C 22PF J
C101 CC73HCH1H220J CHIP C 22PF J

C102 CK73HB1H102K CHIP C 1000PF K

Address

New

Parts No. Description

parts

B11-1895-03 ILLUMINATION GUIDE (LCD)

✽

B11-1896-04 FILTER (LCD)

✽

B38-0939-05 LCD

✽

TH-K20A/K20E

Desti-
nation

M: TH-K20A(M)
K : TH-K20A(K)
E : TH-K20E(E)

11

TH-K20A/K20E

TX-RX UNIT (X57-821X-XX)

Ref. No.

C104,105 CK73HB1H102K CHIP C 1000PF K
C106 CC73HCH1H090B CHIP C 9.0PF B
C107 CK73HB1H102K CHIP C 1000PF K
C108 CC73HCH1H150J CHIP C 15PF J
C109 CK73HB1H102K CHIP C 1000PF K

Address

New

Parts No. Description

parts

PARTS LIST

Desti-
nation

Ref. No.

C234 CK73HB1E103K CHIP C 0.010UF K
C235 CK73HB1H102K CHIP C 1000PF K
C237 CC73HCH1H220J CHIP C 22PF J
C239,240 CK73HB1H102K CHIP C 1000PF K
C244 CK73HB1H102K CHIP C 1000PF K

Address

New

Parts No. Description

parts

Desti-
nation

C110 CK73HB1A104K CHIP C 0.10UF K
C112 CK73HB1E103K CHIP C 0.010UF K
C113 CC73HCH1H560J CHIP C 56PF J
C115 CK73HB1H102K CHIP C 1000PF K
C125 CC73GCH1H390J CHIP C 39PF J

C127 CC73GCH1H470J CHIP C 47PF J
C129 CC73GCH1H150J CHIP C 15PF J
C133 CC73GCH1H270J CHIP C 27PF J
C134 CK73GB1H102K CHIP C 1000PF K
C135 CC73GCH1H060B CHIP C 6.0PF B

C136 CK73GB1H102K CHIP C 1000PF K
C137 CC73GCH1H120J CHIP C 12PF J
C138 CC73GCH1H060B CHIP C 6.0PF B
C139 CC73GCH1H270J CHIP C 27PF J
C140 CC73GCH1H060B CHIP C 6.0PF B

C141 CC73GCH1H120J CHIP C 12PF J
C144 CC73GCH1H220J CHIP C 22PF J
C146 CC73HCH1H180J CHIP C 18PF J
C147 CK73HB1A105K CHIP C 1.0UF K
C148 CK73HB1H102K CHIP C 1000PF K

C150 CK73HB1H102K CHIP C 1000PF K
C151 CK73FB1A225K CHIP C 2.2UF K
C152-157 CK73HB1H102K CHIP C 1000PF K
C159 CK73FB1A225K CHIP C 2.2UF K
C160 CK73HB1H102K CHIP C 1000PF K

C161 CK73HB1E103K CHIP C 0.010UF K
C162 CK73HB1H102K CHIP C 1000PF K
C200 CK73FB1A106K CHIP C 10UF K
C201 CK73HB1H102K CHIP C 1000PF K
C202 CK73HB1E103K CHIP C 0.010UF K

C245 CC73HCH1H020B CHIP C 2.0PF B
C246 CC73HCH1H390G CHIP C 39PF G
C247 CK73HB1H102K CHIP C 1000PF K
C248 CC73HCH1H010B CHIP C 1.0PF B
C249 CC73HCH1H390G CHIP C 39PF G

C250 CC73HCH1H020B CHIP C 2.0PF B
C251 CK73HB1H102K CHIP C 1000PF K
C253-255 CK73HB1H102K CHIP C 1000PF K
C256 CC73HCH1H470G CHIP C 47PF G
C259 CK73HB1H102K CHIP C 1000PF K

C261 CC73HCH1H390G CHIP C 39PF G
C265 CC73HCH1H470G CHIP C 47PF G
C266 CC73HCH1H030B CHIP C 3.0PF B
C270 CC73HCH1H010B CHIP C 1.0PF B
C271 CC73HCH1H390G CHIP C 39PF G

C272 CC73HCH1H030B CHIP C 3.0PF B
C273 CC73HCH1H010B CHIP C 1.0PF B
C301,302 CK73HB1A104K CHIP C 0.10UF K
C304 CK73HB1C473K CHIP C 0.047UF K
C305,306 CK73HB1A105K CHIP C 1.0UF K

C307 CK73HB1A224K CHIP C 0.22UF K
C308 CK73HB1A104K CHIP C 0.10UF K
C310 CK73HB1A104K CHIP C 0.10UF K
C311 CK73HB1C273K CHIP C 0.027UF K
C312 CK73HB1H472K CHIP C 4700PF K

C313 CK73HB1A104K CHIP C 0.10UF K
C314 CK73HB1E103K CHIP C 0.010UF K
C316 CK73HB1A184K CHIP C 0.18UF K
C317 CK73HB1A104K CHIP C 0.10UF K
C318-321 CK73HB1A184K CHIP C 0.18UF K

C203 CC73HCH1H271J CHIP C 270PF J
C204 CK73HB1H182K CHIP C 1800PF K
C205 CK73HB1A104K CHIP C 0.10UF K
C206,207 CC73HCH1H271J CHIP C 270PF J
C208 CK73HB1A104K CHIP C 0.10UF K

C209 CC73HCH1H470G CHIP C 47PF G
C211 CK73HB1A104K CHIP C 0.10UF K
C212 CK73HB1C333K CHIP C 0.033UF K
C213,214 CK73HB1A104K CHIP C 0.10UF K
C215 CK73HB1E103K CHIP C 0.010UF K

C216 CC73HCH1H220J CHIP C 22PF J
C217 CK73HB1E103K CHIP C 0.010UF K
C218 CC73HCH1H050C CHIP C 5.0PF C
C219 CC73HCH1H220J CHIP C 22PF J
C220 CK73HB1H102K CHIP C 1000PF K

C221 CK73HB1E103K CHIP C 0.010UF K
C223 CK73HB1E103K CHIP C 0.010UF K
C226 CC73HCH1H080B CHIP C 8.0PF B
C227 CC73HCH1H060B CHIP C 6.0PF B
C228 CK73HB1E103K CHIP C 0.010UF K

C229 CC73HCH1H050C CHIP C 5.0PF C
C230 CC73HCH1H100B CHIP C 10PF B
C231 CC73HCH1H050C CHIP C 5.0PF C
C232 CC73HCH1H101J CHIP C 100PF J
C233 CK73HB1H102K CHIP C 1000PF K

12

C322 CK73HB1A394K CHIP C 0.39UF K
C323 CK73HB1H332K CHIP C 3300PF K
C324 CK73HB1A184K CHIP C 0.18UF K
C325 CK73HB1A104K CHIP C 0.10UF K
C326 CC73HCH1H181J CHIP C 180PF J

C327 CK73HB1H472K CHIP C 4700PF K
C328 CK73HB1E103K CHIP C 0.010UF K
C329 CK73GB1C225K CHIP C 2.2UF K
C330,331 CC73HCH1H271J CHIP C 270PF J
C332 CK73HB1A105K CHIP C 1.0UF K

C333 CK73HB1H822K CHIP C 8200PF K
C334 CK73HB1C273K CHIP C 0.027UF K
C335 CC73HCH1H271J CHIP C 270PF J
C336 CK73HB1H821K CHIP C 820PF K
C337 CK73HB1E103K CHIP C 0.010UF K

C338 CK73HB1H102K CHIP C 1000PF K
C339 CC73HCH1H100B CHIP C 10PF B
C340,341 CK73HB1E103K CHIP C 0.010UF K
C342 CK73HB1H102K CHIP C 1000PF K
C344 CC73HCH1H271J CHIP C 270PF J

C345 CC73HCH1H101J CHIP C 100PF J
C347 CK73HB1H102K CHIP C 1000PF K
C351,352 CK73HB1H102K CHIP C 1000PF K
C353 CK73HB1C473K CHIP C 0.047UF K
C354 CK73HB1H102K CHIP C 1000PF K

M: TH-K20A(M)
K : TH-K20A(K)
E : TH-K20E(E)

PARTS LIST

Ref. No.

C356 CK73FB1A106K CHIP C 10UF K
C357 C92-0953-05 ELECTRO 100UF 6.3WV
C358 CK73FB1A475K CHIP C 4.7UF K
C359 CK73HB1E103K CHIP C 0.010UF K
C360,361 CK73HB1A224K CHIP C 0.22UF K

Address

New

Parts No. Description

parts

Desti-
nation

TH-K20A/K20E

TX-RX UNIT (X57-821X-XX)

Ref. No.

L10 L40-2775-71 SMALL FIXED INDUCTOR (27NH)
L11 L40-8275-71 SMALL FIXED INDUCTOR (82NH)
L13 L40-4763-92 SMALL FIXED INDUCTOR
L101 L40-6875-71 SMALL FIXED INDUCTOR (68NH)
L103 L40-1085-71 SMALL FIXED INDUCTOR

Address

New

Parts No. Description

parts

(4.7NH)

(100NH)

Desti-
nation

C363 CK73HB1H102K CHIP C 1000PF K
C364 CK73HB1A105K CHIP C 1.0UF K
C365 CK73HB1H102K CHIP C 1000PF K
C366 CK73FB1A106K CHIP C 10UF K
C367 CK73GB1E105K CHIP C 1.0UF K

C369 CK73HB1C473K CHIP C 0.047UF K
C371 CK73HB1C273K CHIP C 0.027UF K
C372 CK73FB1A106K CHIP C 10UF K
C373 CC73HCH1H101J CHIP C 100PF J
C374 CK73HB1A563K CHIP C 0.056UF K

C375 CK73GB1E105K CHIP C 1.0UF K
C376 CK73FB1A475K CHIP C 4.7UF K
C377 CK73GB1E105K CHIP C 1.0UF K
C379 CC73HCH1H221J CHIP C 220PF J
C380 CK73HB1H102K CHIP C 1000PF K

C381 CK73HB1A104K CHIP C 0.10UF K
C382 CC73HCH1H271J CHIP C 270PF J
C383-385 CK73HB1H102K CHIP C 1000PF K
C386 CK73HB1C473K CHIP C 0.047UF K
C402 CK73HB1H102K CHIP C 1000PF K

C404-407 CK73FB0J226M CHIP C 22UF M
C411 CC73HCH1H120J CHIP C 12PF J
C412 CC73HCH1H010B CHIP C 1.0PF B
C413 CK73HB1A104K CHIP C 0.10UF K
C414 CK73HB1H102K CHIP C 1000PF K

C415 CC73HCH1H120J CHIP C 12PF J
C417,418 CK73HB1H102K CHIP C 1000PF K
C419 C93-1803-05 CHIP C 10UF M
C420,421 CK73HB1H102K CHIP C 1000PF K
C423 CK73HB1H102K CHIP C 1000PF K

C424,425 CK73HB1E103K CHIP C 0.010UF K
C427 CK73HB1H102K CHIP C 1000PF K
C428 CK73HB1E103K CHIP C 0.010UF K

J300 2B E11-0484-05 3.5D PHONE JACK (3.5D/MIC)
J301 2B E11-0717-05 2.5D PHONE JACK (2.5D/SP)
104 3A
CN300 E40-6900-05 PIN ASSY (INT SP)

F101 F53-0287-05 FUSE (0.5A)
F300 F53-0372-05 FUSE (3.15A)
F301 F53-0467-05 FUSE (0.315A)

105 2A

106 2A
107 2A J30-1267-04 SPACER (ECM)

CD200 L79-1474-05 TUNING COIL (450KHZ)
CF200 L72-1042-05 CERAMIC FILTER (450KHZ)
L1 L40-2285-92 SMALL FIXED INDUCTOR
L2 L40-1885-92 SMALL FIXED INDUCTOR
L3 L40-1001-86 SMALL FIXED INDUCTOR (10UH)

L4 L41-2778-08 SMALL FIXED INDUCTOR (27NH)
L5 L41-2278-08 SMALL FIXED INDUCTOR (22NH)
L6 L40-1001-86 SMALL FIXED INDUCTOR (10UH)
L8 L40-1001-86 SMALL FIXED INDUCTOR (10UH)
L9 L40-1285-71 SMALL FIXED INDUCTOR

M: TH-K20A(M)
K : TH-K20A(K)
E : TH-K20E(E)

E29-1235-04 INTER CONNECTOR (LCD)

✽

G11-4563-04 SHEET (LCD)

✽

J21-8639-03 MOUNTING HARDWARE (LCD)

✽

(220NH)
(180NH)

(120NH)

If a part reference number is listed in a shaded box, that part does not come with the PCB.

L104 L40-3375-71 SMALL FIXED INDUCTOR (33NH)
L105 L41-8275-53 SMALL FIXED INDUCTOR (82NH)
L106 L34-4577-05 AIR-CORE COIL (9T)
L107 L34-4574-05 AIR-CORE COIL (6T)
L108 L41-2295-52 SMALL FIXED INDUCTOR

L109,110 L34-4577-05 AIR-CORE COIL (9T)
L112 L34-4577-05 AIR-CORE COIL (9T)
L113 L34-4571-05 AIR-CORE COIL (3T)
L114 L34-4573-05 AIR-CORE COIL (5T)
L115 L34-4574-05 AIR-CORE COIL (6T)

L200,201 L40-5681-86 SMALL FIXED INDUCTOR
L202 L40-8281-86 SMALL FIXED INDUCTOR
L204 L40-2275-71 SMALL FIXED INDUCTOR (22NH)
L205 L40-1285-71 SMALL FIXED INDUCTOR
L206 L41-8285-14 SMALL FIXED INDUCTOR

L209 L41-8278-14 SMALL FIXED INDUCTOR (82NH)
L211 L41-8278-14 SMALL FIXED INDUCTOR (82NH)
L213 L41-6878-14 SMALL FIXED INDUCTOR (68NH)
L214 L41-1878-14 SMALL FIXED INDUCTOR (18NH)
L215 L40-2763-71 SMALL FIXED INDUCTOR

L217 L41-8278-14 SMALL FIXED INDUCTOR (82NH)
X1 L77-3074-05 TCXO (19.2 MHZ)
X400 L77-2974-05 CRYSTAL RESONATOR
XF200 L71-0669-05 MCF (38.85MHZ)

VR300 2B R31-0684-05 VARIABLE RESISTOR
CP1 RK74HB1J102J CHIP-COM 1.0K J 1/16W
R2 RK73HB1J272J CHIP R 2.7K J 1/16W
R3 RK73HB1J102J CHIP R 1.0K J 1/16W
R4 RK73HB1J153J CHIP R 15K J 1/16W

R5 RK73HB1J102J CHIP R 1.0K J 1/16W
R6 ,7 RK73HB1J104J CHIP R 100K J 1/16W
R8 RK73HB1J103J CHIP R 10K J 1/16W
R9 RK73HB1J104J CHIP R 100K J 1/16W
R10 RK73HB1J220J CHIP R 22 J 1/16W

R11 RK73HB1J472J CHIP R 4.7K J 1/16W
R12 RK73HB1J221J CHIP R 220 J 1/16W
R14 RK73HB1J102J CHIP R 1.0K J 1/16W
R15 RK73GB2A473J CHIP R 47K J 1/10W
R18 RK73GB2A000J CHIP R 0 J 1/10W

R19 RK73HB1J562J CHIP R 5.6K J 1/16W
R20 RK73HB1J332J CHIP R 3.3K J 1/16W
R21 RK73HB1J331J CHIP R 330 J 1/16W
R22 RK73HB1J332J CHIP R 3.3K J 1/16W
R23 RK73HB1J100J CHIP R 10 J 1/16W

R24 RK73HB1J332J CHIP R 3.3K J 1/16W
R25 RK73HB1J103J CHIP R 10K J 1/16W
R26 RK73HB1J472J CHIP R 4.7K J 1/16W
R27 RK73HB1J222J CHIP R 2.2K J 1/16W
R28 RK73HB1J821J CHIP R 820 J 1/16W

R30 -38 RK73HB1J103J CHIP R 10K J 1/16W
R39 RK73HB1J100J CHIP R 10 J 1/16W
R40 RK73HB1J560J CHIP R 56 J 1/16W
R41 RK73HB1J392J CHIP R 3.9K J 1/16W
R43 RK73HB1J100J CHIP R 10 J 1/16W

(2.2UH)

(0.56UH)
(0.82UH)

(120NH)
(820NH)

(2.7NH)

(11.0592MHZ)

(VOL/PSW)

13

TH-K20A/K20E

PARTS LIST

TX-RX UNIT (X57-821X-XX)

Ref. No.

R45 RK73HB1J333J CHIP R 33K J 1/16W
R46 RK73HB1J104J CHIP R 100K J 1/16W
R47 RK73GB2A105J CHIP R 1.0M J 1/10W
R48 RK73GB2A102J CHIP R 1.0K J 1/10W
R101 RK73HB1J180J CHIP R 18 J 1/16W

Address

New

Parts No. Description

parts

Desti-
nation

Ref. No.

R246 RK73HB1J104J CHIP R 100K J 1/16W
R247 RK73HB1J332J CHIP R 3.3K J 1/16W
R248 RK73HB1J152J CHIP R 1.5K J 1/16W
R249 RK73HB1J102J CHIP R 1.0K J 1/16W
R251 RK73HB1J105J CHIP R 1.0M J 1/16W

Address

New

Parts No. Description

parts

Desti-
nation

R102 RK73HB1J102J CHIP R 1.0K J 1/16W
R103 RK73HB1J222J CHIP R 2.2K J 1/16W
R104 RK73HB1J180J CHIP R 18 J 1/16W
R105 RK73HB1J331J CHIP R 330 J 1/16W
R107 RK73HB1J180J CHIP R 18 J 1/16W

R108 RK73HB1J100J CHIP R 10 J 1/16W
R109 RK73HB1J104J CHIP R 100K J 1/16W
R111 RK73HB1J823J CHIP R 82K J 1/16W
R112 RK73HB1J470J CHIP R 47 J 1/16W
R113 RK73HB1J683J CHIP R 68K J 1/16W

R114 RK73HB1J470J CHIP R 47 J 1/16W
R115 RK73HB1J563J CHIP R 56K J 1/16W
R116 RK73GB2A000J CHIP R 0 J 1/10W
R119 RK73GB2A000J CHIP R 0 J 1/10W
R120 RK73HB1J182J CHIP R 1.8K J 1/16W

R121 RK73HB1J393J CHIP R 39K J 1/16W
R124 RK73HB1J331J CHIP R 330 J 1/16W
R125 R92-3637-05 CHIP R 0.39 J 1/3W
R126 RK73HB1J271J CHIP R 270 J 1/16W
R127 R92-3637-05 CHIP R 0.39 J 1/3W

R128 RK73HB1J271J CHIP R 270 J 1/16W
R129 R92-3637-05 CHIP R 0.39 J 1/3W
R130 RK73FB2B000J CHIP R 0 J 1/8W
R200 RK73HB1J470J CHIP R 47 J 1/16W
R201 RK73HB1J152J CHIP R 1.5K J 1/16W

R203 RK73HB1J683J CHIP R 68K J 1/16W
R204 RK73HB1J332J CHIP R 3.3K J 1/16W
R205 RK73HB1J222J CHIP R 2.2K J 1/16W
R206 RK73HB1J334J CHIP R 330K J 1/16W
R207 RK73HB1J272J CHIP R 2.7K J 1/16W

R252,253 RK73HB1J472J CHIP R 4.7K J 1/16W
R300-302 RK73HB1J102J CHIP R 1.0K J 1/16W
R303-305 RK73HB1J103J CHIP R 10K J 1/16W
R307 RK73HB1J105J CHIP R 1.0M J 1/16W
R308 RK73HB1J102J CHIP R 1.0K J 1/16W

R309 RK73HB1J562J CHIP R 5.6K J 1/16W
R310 RK73HB1J393J CHIP R 39K J 1/16W
R311-313 RK73HH1J473D CHIP R 47K D 1/16W
R314 RK73HB1J824J CHIP R 820K J 1/16W
R315 RK73HB1J564J CHIP R 560K J 1/16W

R316 RK73HB1J103J CHIP R 10K J 1/16W
R317 RK73HB1J392J CHIP R 3.9K J 1/16W
R318 RK73HB1J272J CHIP R 2.7K J 1/16W
R319 RK73HB1J181J CHIP R 180 J 1/16W
R320 RK73HB1J563J CHIP R 56K J 1/16W

R321 RK73HB1J222J CHIP R 2.2K J 1/16W
R322 RK73HB1J332J CHIP R 3.3K J 1/16W
R323 RK73HB1J102J CHIP R 1.0K J 1/16W
R324 RK73HB1J561J CHIP R 560 J 1/16W
R325 RK73HB1J471J CHIP R 470 J 1/16W

R326 RK73HB1J562J CHIP R 5.6K J 1/16W
R327 RK73HB1J104J CHIP R 100K J 1/16W
R328 RK73HB1J103J CHIP R 10K J 1/16W
R329 RK73HB1J334J CHIP R 330K J 1/16W
R330 RK73HB1J104J CHIP R 100K J 1/16W

R331,332 RK73HH1J563D CHIP R 56K D 1/16W
R333,334 RK73HH1J473D CHIP R 47K D 1/16W
R335-338 RK73HB1J103J CHIP R 10K J 1/16W
R339,340 RK73HB1J102J CHIP R 1.0K J 1/16W
R341 RK73HB1J000J CHIP R 0 J 1/16W

R208 RK73HB1J183J CHIP R 18K J 1/16W
R210 RK73HB1J683J CHIP R 68K J 1/16W
R212 RK73HB1J101J CHIP R 100 J 1/16W
R213 RK73HB1J470J CHIP R 47 J 1/16W
R214 RK73HB1J334J CHIP R 330K J 1/16W

R215 RK73HB1J000J CHIP R 0 J 1/16W
R216 RK73HB1J184J CHIP R 180K J 1/16W
R218 RK73HB1J102J CHIP R 1.0K J 1/16W
R220 RK73HB1J681J CHIP R 680 J 1/16W
R221 RK73HB1J331J CHIP R 330 J 1/16W

R225 RK73HB1J470J CHIP R 47 J 1/16W
R226 RK73FB2B000J CHIP R 0 J 1/8W
R227 RK73HB1J331J CHIP R 330 J 1/16W
R228 RK73HB1J102J CHIP R 1.0K J 1/16W
R229-231 RK73HB1J823J CHIP R 82K J 1/16W

R232 RK73HB1J000J CHIP R 0 J 1/16W
R233,234 RK73HB1J105J CHIP R 1.0M J 1/16W
R235 RK73HB1J470J CHIP R 47 J 1/16W
R236 RK73HB1J820J CHIP R 82 J 1/16W
R237 RK73HB1J471J CHIP R 470 J 1/16W

R238 RK73HB1J104J CHIP R 100K J 1/16W
R239 RK73HB1J394J CHIP R 390K J 1/16W
R240 RK73HB1J104J CHIP R 100K J 1/16W
R241 RK73HB1J184J CHIP R 180K J 1/16W
R243 RK73HB1J105J CHIP R 1.0M J 1/16W

14

R342 RK73HB1J564J CHIP R 560K J 1/16W
R345 RK73HB1J823J CHIP R 82K J 1/16W
R346 RK73HB1J274J CHIP R 270K J 1/16W
R347 RK73GB2A473J CHIP R 47K J 1/10W
R350 RK73HB1J183J CHIP R 18K J 1/16W

R351 RK73HB1J101J CHIP R 100 J 1/16W
R353 RK73HB1J103J CHIP R 10K J 1/16W
R354 RK73HB1J102J CHIP R 1.0K J 1/16W
R355 RK73HB1J471J CHIP R 470 J 1/16W
R357 RK73HB1J561J CHIP R 560 J 1/16W

R358 RK73HB1J473J CHIP R 47K J 1/16W
R359 RK73HB1J331J CHIP R 330 J 1/16W
R360 RK73HB1J182J CHIP R 1.8K J 1/16W
R361 RK73HB1J473J CHIP R 47K J 1/16W
R362 RK73HB1J334J CHIP R 330K J 1/16W

R363,364 RK73HB1J102J CHIP R 1.0K J 1/16W
R365 RK73HB1J222J CHIP R 2.2K J 1/16W
R366 RK73HB1J000J CHIP R 0 J 1/16W
R367 RK73HB1J334J CHIP R 330K J 1/16W
R368 RK73HB1J274J CHIP R 270K J 1/16W

R369 RK73HB1J000J CHIP R 0 J 1/16W
R370 RK73HB1J474J CHIP R 470K J 1/16W
R372 RK73HB1J473J CHIP R 47K J 1/16W
R374 RK73HB1J103J CHIP R 10K J 1/16W
R376 RK73HB1J000J CHIP R 0 J 1/16W

M: TH-K20A(M)
K : TH-K20A(K)
E : TH-K20E(E)

PARTS LIST

Ref. No.

R377 RK73HB1J473J CHIP R 47K J 1/16W
R378 RK73HB1J273J CHIP R 27K J 1/16W
R379 RK73HB1J104J CHIP R 100K J 1/16W
R380 RK73HB1J2R2J CHIP R 2.2 J 1/16W
R382 RK73HB1J822J CHIP R 8.2K J 1/16W

Address

New

Parts No. Description

parts

Desti-
nation

TH-K20A/K20E

TX-RX UNIT (X57-821X-XX)

Ref. No.

D404-407 1SS388F DIODE
D408 DA2S101 DIODE E
D408-411 DA2S101 DIODE K
D409-411 DA2S101 DIODE M
D410,411 DA2S101 DIODE E

Address

New

Parts No. Description

parts

Desti-
nation

R383 RK73HB1J103J CHIP R 10K J 1/16W
R385 RK73HB1J102J CHIP R 1.0K J 1/16W
R386 RK73HB1J823J CHIP R 82K J 1/16W
R387 RK73HB1J333J CHIP R 33K J 1/16W
R388 RK73HB1J102J CHIP R 1.0K J 1/16W

R389 RK73HH1J153D CHIP R 15K D 1/16W
R400,401 RK73HB1J224J CHIP R 220K J 1/16W
R402 RK73HB1J473J CHIP R 47K J 1/16W
R403 RK73HB1J224J CHIP R 220K J 1/16W
R405 RK73HB1J472J CHIP R 4.7K J 1/16W

R414 RK73HB1J472J CHIP R 4.7K J 1/16W
R415 RK73HB1J473J CHIP R 47K J 1/16W
R419 RK73HB1J472J CHIP R 4.7K J 1/16W
R422 RK73HB1J102J CHIP R 1.0K J 1/16W
R424 RK73HB1J102J CHIP R 1.0K J 1/16W

R425 RK73HB1J474J CHIP R 470K J 1/16W
R431 RK73HB1J000J CHIP R 0 J 1/16W M
R432 RK73HB1J000J CHIP R 0 J 1/16W K
R433 RK73HB1J000J CHIP R 0 J 1/16W E

R437 RK73HB1J332J CHIP R 3.3K J 1/16W
R438 RK73HB1J681J CHIP R 680 J 1/16W
R439 RK73HB1J333J CHIP R 33K J 1/16W
R440 RK73HB1J473J CHIP R 47K J 1/16W
R441 RK73HB1J101J CHIP R 100 J 1/16W
R442 RK73GB2A221J CHIP R 220 J 1/10W

R443 RK73HB1J101J CHIP R 100 J 1/16W
R444,445 RK73GB2A221J CHIP R 220 J 1/10W
R446 RK73GB2A331J CHIP R 330 J 1/10W
R447-451 RK73HB1J122J CHIP R 1.2K J 1/16W
R452,453 RK73HB1J104J CHIP R 100K J 1/16W

IC1 MB15E03SL-E1 MOS-IC
IC200 TA31136FNG MOS-IC
IC300 R2A20178NP DAC IC
IC301-304 NJM12904RB1 MOS-IC
IC305 XC6120N302N-G MOS-IC

IC306 XC6209B502P-G MOS-IC
IC307 TA7368PL MOS-IC
IC308 XC6209B502P-G MOS-IC
IC400 EX25064ATA00A ROM IC
IC401 R5F2L3ACCKEKA MCU

Q1 LTC014EEBFS8 TRANSISTOR
Q2 2SC5383-T111 TRANSISTOR
Q3 MCH3914(7)-H FET
Q4 2SC5108(Y)F TRANSISTOR
Q5 2SC5636 TRANSISTOR

Q6 LTC014EEBFS8 TRANSISTOR
Q7 2SC5383-T111 TRANSISTOR
Q101 2SC4926YD TRANSISTOR
Q102 RFM01U7P FET

Q103 RD07MUS2BT112 FET
Q104 LTC014EEBFS8 TRANSISTOR
Q200 LTA023JEBFS8 TRANSISTOR
Q201,202 KTC4080E-P TRANSISTOR
Q203,204 3SK318 FET
Q300 LTA023JEBFS8 TRANSISTOR

Q301,302 LTC044EEBFS8 TRANSISTOR
Q303 2SK3577-A FET
Q304 SSM3J05FU-F FET
Q305 2SK3577-A FET
Q306 SSM6J08FU(F) FET

R464 RK73HB1J273J CHIP R 27K J 1/16W
R465 RK73HB1J473J CHIP R 47K J 1/16W
R466 RK73GB2A000J CHIP R 0 J 1/10W
R470 RK73HB1J473J CHIP R 47K J 1/16W

S417 S70-0514-05 TACT SWITCH (MONI)
S418 2B S70-0414-05 TACT SWITCH (PTT)

MIC300 2A T91-0673-05 MIC ELEMENT

D1 ,2 1SV325F VARIABLE CAPACITANCE DIODE
D3 HSC277 DIODE
D4 ,5 HVC350B VARIABLE CAPACITANCE DIODE
D6 DA2S101 DIODE
D7 ,8 HSC277 DIODE

D9 -11 DA2S101 DIODE
D101,102 HVC131 DIODE
D103-105 RN142S DIODE
D200,201 HVC350B VARIABLE CAPACITANCE DIODE
D203,204 HVC350B VARIABLE CAPACITANCE DIODE

D300 KDR731 DIODE
D301 GN1G DIODE
D302 RB521S-30 DIODE
D304 RB521S-30 DIODE
D305

D401

M: TH-K20A(M)
K : TH-K20A(K)
E : TH-K20E(E)

DZ2S068(M) ZENER DIODE

✽

DZ2S036(0) ZENER DIODE

✽

If a part reference number is listed in a shaded box, that part does not come with the PCB.

Q307 LTA023JEBFS8 TRANSISTOR
Q308 SSM3J05FU-F FET
Q400 2SC4649(N,P) TRANSISTOR
Q401 12A02CH TRANSISTOR
Q402 2SC4617(R) TRANSISTOR

Q403,404 RTIN144U-T111 TRANSISTOR
TH101 B57331V2104J THERMISTOR (100K)
TH200 NCP18WM474J0S THERMISTOR (470K)
S419 2B

W02-3766-05 ENCODER

✽

15

TH-K20A/K20E

51

52

1

1

47

8

EXPLODED VIEW

BA

48

49

6

54

23

33

34

X57

MIC300

X57

107

2

X57

TX-RX unit

106

105

103

101

102

32

2

27

24

21

7

Cx13

X57

S418

X57

J301

X57

J300

X57

VR300

X57

S419

36

7

A

A

19

4

16

B

104

3

31

701

700

700

B

46

702

700

: K : E

26

29

: M

3

A : N09-2438-05
B : N80-2606-43
C : N83-2005-48

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

If a part reference number is listed in a box on the exploded view of the PCB, that part does not come with the PCB.
These parts must be ordered separately.

1

59 AC ADAPTER

(W08-1247-15): K

58 AC ADAPTER

(W08-1246-15): M, E

62 BATTERY ASSY

(W09-1073-25)

38 PACKING FIXTURE

(H12-4326-02): K

PACKING

11 INSTRUCTION MANUAL

(B62-2369-00): K, E

18 INSTRUCTION MANUAL

(B62-2375-00): M

712 WARRANTY CARD

711 PROTECTION BAG

TH-K20A/K20E

DC

9 INSTRUCTION MANUAL

(B62-2365-00)

12 INSTRUCTION MANUAL

(B62-2370-00): K, E

13~16 INSTRUCTION MANUAL

(B62-2371-00) : E
(B62-2372-00) : E
(B62-2373-00) : E
(B62-2374-00) : E

710 PROTECTION BAG

57 HELICAL ANTENNA

2

(T90-1044-15): K, E

56 HELICAL ANTENNA

(T90-1018-35): M

42 Belt clip

(J29-0756-05)

61 CHARGER

(W08-1249-35)

37 PACKING FIXTURE

(H12-4324-02): K

3

M: TH-K20A(M)

K: TH-K20A(K)
E: TH-K20E(E)

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

41 ITEM CARTON CASE

(H52-2486-02): K

17

TH-K20A/K20E

ADJUSTMENT

Note:

• When performing the TH-K20 adjustment, a personal
computer, programming interface cable (KPG-22A/22U),
tuning cable (E30-3216-05) and tuning software (MCP-5T)
are required.

• When you do not want to lose data such as memory
channels or menu items, save the data using the MCP-
5A (Memory control program), then write the data to the
transceiver after performing the adjustment.

To download the MCP-5A software, go to:

http://www.kenwood.com/i/products/info/amateur/software_download.htm

(This URL may change without notice.)

1. PC Tuning

The tuning software can be used with a PC. Figure 1

shows the setup of a PC for programming.

PC

MCP-5T

KPG-22A or KPG-22U

Illustration is KPG-22A.

Required Test Equipment

1. Stabilized Power Supply

1) The supply voltage can be changed between 3V and 16V
and the current is 3A or more.

2) The standard voltage is 7.5V. (Power supply voltage
range: 6V-9V)

2. DC Ammeter (DC. A)

1) Class 1 ammeter (17 ranges and other features)

l

2) The full scale can be switched between 300mA and 3A.

3) A cable with low internal loss must be used.

3. Frequency Counter (f. counter)

1) Frequencies of up to 1GHz or so can be measured.

2) The sensitivity can be changed to 250MHz or below and
measurements are highly stable and accurate (about

0.2ppm).

4. Power Meter (terminal type)

1) Measurable frequency: Up to 500MHz

2) Impedance: 50, unbalanced

3) Measuring range: Full scale of 10W

4) The specifi ed special connection cable must be used.

5. RF VM (RF V.M)

1) Measurable frequency: Up to 500MHz or so

KPG-22A

+

SP

–
+

MIC

–

PC

USB

KPG-22U

Tuning cable
(E30-3216-05)

Gray
Gray/Black

1.5D-XV Lead wire

1.5D-XV Shield wire

D-SUB

(9-pin)

Transceiver Transceiver

Fig. 1

PC

Note:

• You must install the KPG-22U driver in the computer to
use the USB programming interface cable (KPG-22U).
The KPG-22U driver runs under Windows XP, Vista or 7.

2. Tuning Software MCP-5T Description

The MCP-5T is the tuning software for the TH-K20. This

software runs under Windows XP, Vista or 7 on a PC. The
software allows a user to tuning the transceiver via Program-
ming interface cable (KPG-22A/22U) and tuning cable (E30-
3216-05).

Refer to the MCP-5T help fi le for the details on how to

use the MCP-5T.

3. Firmware version information

Press and hold the [ENT] key while turning the transceiv-

er power ON , the fi rmware version information appears on
the LCD.

6. Linear Detector

1) Measurable frequency: Up to 500MHz

2) Characteristic is fl at and CN is 60dB or more.

7. Digital Voltmeter

1) Voltage range: FS = 18V or so

2) Input resistance: 1M or more

8. Oscilloscope

1) Measuring range: DC to 30MHz

2) Provides highly accurate measurements for 5 to 25MHz

9. AF Voltmeter (AF V.M)

1) Measurable frequency: 50Hz to 1MHz

2) Maximum sensitivity: 1mV or more

10. Spectrum Analyzer

1) Measuring range: 10kHz to 1GHz or more

11. Standard Signal Generator (SSG)

1) Maximum frequency: 500MHz or more

2) Output: –133dBm (0.05µV) to –13dBm (50mV)

3) Output impedance: 50



12. Tracking Generator

1) Center frequency: 50kHz to 200MHz

2) Frequency deviation: ±35MHz

3) Output voltage: 100mV or more

13. Dummy Load

1) 8, 3W or more

18

ADJUSTMENT

TH-K20A/K20E

Frequency and Signaling

The transceiver has been adjusted for the frequencies
shown in the following table. When required, re-adjust them
following the adjustment procedure to obtain the frequencies
you want in actual operation.

Test Frequency

■

CH Receive (MHz) Transmit (MHz)

1 159.05000 159.10000

2 144.05000 144.10000

3 173.95000 173.90000

4 159.00000 159.00000

5 159.20000 159.20000

6 159.40000 159.40000

7~16 - -

Signaling

■

No. RX (Decode) TX (Encode)

1 None None

2 None 100Hz Square Wave

3 CTCSS 67.0Hz CTCSS 67.0Hz

4 CTCSS 151.4Hz CTCSS 151.4Hz

5 CTCSS 210.7Hz CTCSS 210.7Hz

6 CTCSS 254.1Hz CTCSS 254.1Hz

7 DCS D023N DCS D023N

8 DCS D754I DCS D754I

9 None

10 None

11 None 1633Hz Tone

DTMF
(Code: 159D)

DTMF
(Code: D)

Preparations for Tuning the Transceiver

Before attempting to tune the transceiver, connect the

unit to a suitable power supply.

Whenever the transmitter is tuned, the unit must be con-

nected to a suitable dummy load (i.e. power meter).

The speaker output connector must be terminated with a
8 dummy load and connected to an AC voltmeter and an
audio distortion meter or a SINAD measurement meter at all
times during tuning.

Tuning frequency

■

Tuning point Receive (MHz) Transmit (MHz)

Low 136.05000 136.10000

Center 146.05000 146.10000

Center*1 155.05000 155.10000

High 173.95000 173.90000

*1: This center frequency is used for adjustment of DCS Balance

and Maximum Deviation.

Adjustment Points

TX-RX UNIT

Component side view

MIC300

+B

BATT+

SPK
SPG

GND

BATT-

CN300

CV

ANT

Foil side view

S417

S418

PTT

POW/VOL

VR300

BATT+ (7.5V)

S419

SP

+

–

ENCODER

J301

Note: When replacing CF200 and C

MIC

J300

MONI

CF200

CD200

D

200, apply bond to

the point shown in the fi gure.

BATT– (GND)

19

TH-K20A/K20E

Common Section

Item Condition

1. Setting 1) BATT terminal voltage: 7.5V

2) SSG standard modulation
[Wide]
MOD: 1kHz, DEV: 3kHz
[Narrow]
MOD: 1kHz, DEV: 1.5kHz

Test-

equipment

ADJUSTMENT

Measurement Adjustment

Unit

Terminal

Unit Parts Method

Specifi cations / Remarks

2. VCO Lock
Voltage

Note:

• Press [Apply] button to store the adjustment value. (For single adjustment point)

• Press [Apply All] button to store the adjustment value after all adjustment points have been adjusted. (For 3 adjustment point)

1) Adj item: High Power
meter

TX-RX ANT

(CV)

MCP-5T4.0V

[V] indicator on the
PC window shows
VCO lock voltage.
Change the adjust-
ment value to get
VCO lock voltage
within the limit of the
specifi ed voltage.

±0.1V

Press [Apply] button to store
the adjustment value.

Transmitter Section

Measurement Adjustment

Item Condition

1. Frequency 1) Tuning point: High
Press [Transmit] button.

2. High

Transmit
Power and

Protective
Current

3. Low

Transmit
Powe r

1) Tuning point: Low, Center,

High (3 points)
BATT terminal voltage: 7.5V
Press [Transmit] button.

1) Tuning point: Low, Center,

High (3 points)
BATT terminal voltage: 7.5V
Press [Transmit] button.

Test-

equipment

f. counter TX-RX ANT MCP-5T173.900MHz ±50Hz

Powe r
meter
Ammeter

Unit

Terminal

Unit Parts Method

MCP-5T5.5W ±0.1W

1.0W ±0.1W

Specifi cations / Remarks

2.0A or less

1.0A or less

4. Mid
Transmit
Powe r

5. DCS
Balance
[Wide]

6. Maximum
Deviation
[Wide]

20

1) Tuning point: Low, Center,

High (3 points)
BATT terminal voltage: 7.5V
Press [Transmit] button.

1) Tuning point: Low, Center,

High (3 points)
(Signaling Square Wave)
Deviation meter fi lter
LPF: 3kHz
HPF: OFF
Press [Transmit] button.

1) Tuning point: Center, Low,

High (3 points)
AG: 1kHz/150mV
Deviation meter fi lter
LPF: 15kHz
HPF: OFF
Press [Transmit] button.

Powe r
meter

Deviation
meter
Oscilloscope
AG
AF VM

TX-RX ANT

SP/MIC
connector

2.0W ±0.1W

MCP-5TMake the modulation

wave into square
waves.

4.0kHz
(According to
the larger +, –)

1.5A or less

±100Hz

TH-K20A/K20E

ADJUSTMENT

Measurement Adjustment

Item Condition

7. Battery
Detection
Check

(User mode)

• This transceiver is designed to make adjustments simple.

• It is not necessary to adjust the fi xed values for the DTMF-DEV, DQT-DEV, QT-DEV, and MIC sensitivity.

• The TX-DEV Narrow setting uses the Wide calculated adjustment level value.

1) BATT terminal voltage: 7.1V
PTT: ON
TX Power: Low
Battery type: Li-ion

2) BATT terminal voltage: 7.8V
PTT: ON
TX Power: Low
Battery type: Li-ion

Receiver Section

Item Condition

1. Band Pass
Filter

2. Sensitivity

Check
[Narrow]

1) Tuning point: Low, Center,
High (3 points)

SSG output: –90dBm

(7.08µV)

SSG DEV: 3.0kHz

1) Tuning point: Low, High
(2 points)

SSG output: –120dBm

(0.22µV)

SSG DEV: 1.5kHz

Test-

equipment

Powe r
meter

DVM

Test-

equipment

SSG
DVM
Oscilloscope
AF VM

Unit

Terminal

TX-RX ANT

BATT
terminal

Measurement Adjustment

Unit

Termina

TX-RX ANT

SP/MIC
connector

Unit Parts Method

l Unit Parts Method

Check Segment display: 4 dots

MCP-5T[Automatic Adjust-

ment]
Press [Start] button
of “Auto Tuning”.
Press [Apply] button
to store the adjust-
ment value after the
automatic adjust-
ment has fi nished.

Check 12dB SINAD or more

Specifi cations / Remarks

Segment display: 9 dots

Specifi cations / Remarks

3. Squelch
Level 2 Write

[Wide]

[Narrow] 2) Tuning point: Low, Center,

4. S Meter 1
Write
(RSSI)

S Meter
FULL Write
(RSSI)

• The Squelch Level 1 setting uses the Squelch Level 2 calculated adjustment level value.

1) Tuning point: Low, Center,
High (3 points)

SSG output: –121dBm

(0.2µV)

SSG DEV: 3.0kHz

High (3 points)

SSG output: –121dBm

(0.2µV)

SSG DEV: 1.5kHz

1) Tuning point: Center
(1 points)

SSG output: –120dBm

(0.22µV)

SSG DEV: 3.0kHz

2) Tuning point: Center
(1 points)

SSG output: –105dBm

(1.26µV)

SSG DEV: 3.0kHz

MCP-5TWrite

MCP-5TWrite S Meter Icon (2 dots)

Write S Meter Icon (9 dots)

21

4

5

TH-K20A/K20E PC BOARD

1

TX-RX UNIT (X57-821X-XX) 0-11: K 0-20: M 2-71: E

2

Component side view (J79-0325-09)

J79-0325-09

JIHGFEDCBA

D41

3

R448

D419

D418

4

D416

D410

D411

D406

D420

D422

76

75

D407

CN202

25

IC401

26

CN304

CN30

100

1

5R

Q400

R422

C412

C411

F424

R447

D417

R425

X400

C415

D409

D408

D405

D421

5

D404

6

R449

R450

D423

CV

7

8

10

11

12

13

R451

D425

R433

R432

R431

D424

MODE

GND

RESE

9

D41

Ref. No. Address

IC300 6O
IC301 8Q

IC304 6P

IC305 6M

IC306 5N

IC307 4P

IC308 4N

IC401 6J

Q300 6Q

Q301 5P

Ref. No. Address

Q302 5P

Q303 4O

Q304 7N

Q305 4O

Q306 5P

Q308 4N

Q400 7H

D300 8O

D301 5M

D302 5N

Ref. No. Address

D304 5N

D305 9O

D404 5C

D405 5D

D406 5E

D407 5F

D408 5D

D409 5E

D410 5E

D411 5E

Ref. No. Address
D414 10J
D415 2J

D416 4G

D417 8G

D418 3F

D419 3D

D420 5F

D421 5D

D422 7F

D423 7D

Ref. No. Address
D424 9F

D425 9D

D426 8R

D427 7R

14

22

J KLMNOPQRS

N304

GND

D415

CN303

RESET

PC BOARD TH-K20A/K20E

1

TX-RX UNIT (X57-821X-XX) 0-11: K 0-20: M 2-71: E
Component side view (J79-0325-09)

R440

C423

R443

MIC300

C344

R377

D301

C380

C352

F300

+B

+B

GND

IC305

2

1

C365

1

2

C364

C363

SPK

SPG

C354

51

50

CP1

5M

4

3

C358

CN300

C383

1

3

4

5

C366

R362

C329

IC308

IC306

5M

Q304

5T

S

R379

D304

D302

3

1

D

Q308

D

G

C377

5

C375

4

SB

R372

G

C322

C321

R323

R358

R351

R365

R364

S

R355

R363

5C

C376

C374

R374

GND

R305

C304

R309

R350 and

C356

R360

D305

Q305

G

Q303

C359

S

C301

D

S

G

D

C367

C369

18

19

IC300

24

1

R300

R301

D300

C351

R354

C353

R370

13

6

R302

C302

R310

C307

12

7

R308

R368

R304

R376

6

10

Q302

C305
R307

R303

C306

R366

C373

IC307

Q301

R359

C372

C379

5

1

R378

C360

R367

SB

R335

R337

R336

C333

C336

R338

C334

1

R339

45

C342

R340
R345

R346

C314

R347

C340

R353

IC304

C339

R342

C341

R318

Q306

D

G

S

F301

C332

C337

C338

C381

8

R341

R317

C313

C421

R441

R316

D

Q300

C312

R315

C310

R312

5

8

R313

R357

R470

C311

IC301

R389

R314

C308

C371

C335

R311

C425

R380

R445

R446

D427

4

1

D426

R466

2

3

4

5

6

7

8

9

D414

Component side

Layer 1
Layer 2
Layer 3
Layer 4

10

11

Foil side

12

13

23

14

R235

3

R127

3

3

2

L211

6

TH-K20A/K20E PC BOARD

1

TX-RX UNIT (X57-821X-XX) 0-11: K 0-20: M 2-71: E

2

Foil side view (J79-0325-09)

JIHGFEDCBA

S418

PTT

S417
MONI

3

C125

R126

C157

D102

R128

D101

L108

C144

L112

C135

C134

D103

D105

R119

L107

C146

D104

L115

C133

C265

C139

C141

4

L110

C140

C138

L109

C137

C136

5

R319

C318

R388

R320

C345

6

VR300

+

C357

7

Q404

Q403

8

S419

C424

R453

R452

C347

J301

J300

C317

C320

R325

C325

5

4

IC302

1

8

R386

C319

R322

R326
C324

5

4

IC303

1

8

C328

R328

R385

R387

R321

C327

R327

R329

C326

R330

R361

C316

R369

C361

C406

C407

C404

C405

L214

L213

C261

C427

C428

C129

R243

8

1

R402

D203

C256

R241

R414

IC400

R415

L114

R405

5

4

C259

R240

C419

Q204

G

G

C255

R239

R238

C253

C417

C420

C160

C154

S

D

D401

R438

C127

R236

R439

C418

R437

Q402

R129

R237

L11

C25

R248

C38

R38

R3

C3

C251

R464

9

10

11

12

13

14

24

Ref. No. Address

IC1 8Q

IC200 8M

IC302 6G

IC303 7F
IC400 8I

Q1 6Q

Q2 4P

Q3 5Q

Q4 4Q

Ref. No. Address

Q5 3Q

Q6 8R

Q7 9Q

Q101 4N

Q102 3N

Q103 4L

Q104 4N

Q200 8M

Q201 9O

Ref. No. Address
Q202 8N

Q203 6M

Q204 6J

Q307 4O
Q401 9J

Q402 8J

Q403 8C

Q404 7C
D1 5P

Ref. No. Address
D2 5P

D3 6P

D4 5Q

D5 5Q

D6 5P

D7 4P

D8 3P

D9 5R

D10 6R

Ref. No. Address

D11 6Q

D101 4F

D102 4F

D103 4G

D104 5H

D105 4G

D200 6K

D201 6K

D203 5I

Q401

Ref. No. Address

D204 6L

D401 8J

J KLMNOPQRS

C417

C420

204

255

239

C154

C253

S

D

D401

C160

R438

Q401

C127

R236

R439

C418

R437

Q402

L113

R129

C254

R237

R248

C386

R382

C125

C251

R332

C331

R464

R444

R127

R235

L211

R442

C330

C250

R334

R125

D201

R383

R331

C249

R333

C247

R234

C248

R233

C402

R130

C151

D200

C246

R401

C162

C161

C152

R400

C245

C323

R403

C204

R324

L106

R121

C153

L209

TH101

R419

CD200

R251

C272

C413

C273

C203

R204

D204

C414

C271

R465

C270

Q103

R207

L217

R205

R232

R203

C211

GD

C244

C205

R201

C202

Q200

R115

C115

C150

R231

C207

R116

C240

R230

CF200

C206

R206

8

9

C209

PC BOARD

TH-K20A/K20E

TX-RX UNIT (X57-821X-XX) 0-11: K 0-20: M 2-71: E
Foil side view (J79-0325-09)

C105

C113

R246

R229

R252

R114

IC200

R112

R113

G

Q203

C208

C233

SG

D

C212

L105

F101

C214

R208

D

C112

C239

R253

C213

C108

L104

G

S

R108

Q102

R111

C109

C110

R109

C104

C155

C156

C159

Q104

R120

R124

R227

R225

C235

L206

R247

C237

R228

R226

R200

C200

C201

1

16

L202

R249

R210

R213

C221

C217

TH200

R215

C215

C107

C

E

C232

Q202

R104

C266

L205

C228

R220

C223

C106

Q101

R216

R103

C385

C234

R221

XF200

C216

C218

R212

R105

E

B

Q307

R43

L103

C227

R28

L200L201

R107

C148

C147

R101

C382

C231

R27

C48

R102

C102

L204

C230

C229

R41

C219

C220

C49

C44

C101

C384

+

L101

C226

Q201

L215

C38

C37

R24

C34

D8

R22

R26

L11

C36

R25

X1

C50

R214

R218

R11

C18

D2

C47

C21

C1

C33

D7

Q2

+

C16

D6

L2

D1

L5

L1

C6
D3

L3

16

C39

+

1

L13

C45

C51

R21

C32

Q5

C26

R23

C8

R39

R20

R19

C31

C13

C5

L4

Q3

R8

C7

D5

D4

Q1

R6

R5

R2

IC1

Q7

C43

C41

R15

C10

C17

C19

R12

C20

L10

C28

C25

C29

C27

L9

R14

Q4

R35

R34

C42

R48

S

D11

R45

D

C15

C46

C23

C22

R18

L6

L8

C2

C3

R3

R4

R7

R9

R33

R37

R38

R36

R31

R32

Q6

R30

R40

R46

R10

G

C9

C4

9

8

R47

1

2

3

4

C12

+

C11

D9

D10

5

6

7

8

9

J79-0325-09

Component side

Layer 1
Layer 2
Layer 3
Layer 4

10

11

Foil side

12

13

25

14

A

B

C D

E

TH-K20A/K20E

1

2

3

TX-RX UNIT(X57-821X-XX)

LCD

COM0

COM1

COM2

COM3

SEG0

47K

R470

INPTT

100

R441

PTT

S418

1000p

C421

MONI

S417

C423

1000p

SEG1

SEG2

SEG3

SEG4

R440

R443

SEG5

SEG6

47k

100

SEG7

SEG8

SEG9

SEG10

SEG11

SEG12

S401

9

S405

6

S409

3

S413

D

SEG13

SEG14

SEG15

SEG16

SEG17

SEG18

SEG19

S402 S403 S404

0

#

S406

S407

8

5

S411

S410

S414

1

S415

C

B

SCHEMATIC DIAGRAM

SEG20

SEG21

SEG22

SEG23

S408

S412

S416

SEG24

SEG25

SEG26

7

42

D4 04-407

A

REVERSE CURRENT
PREVENTION

SEG27

SEG28

D404

1SS388F

D405

1SS388F

D406

1SS388F

D407

1SS388F

R431

R432

R433

SEG29

SEG30

SEG31

D408-D411

D408

Key matrix

D409

D410

DA2S101

D411

DA2S101

0-20

0-11

2-71

X57-8210-XX

0-20

0-11

2-71

D408

M

K

DA2S101

E

DA2S101

DA2S101

NO

DA2S101

NO

KEYO4

KEYO3

KEYO2

KEYO1

KEYIT

KEYI4

KEYI3

KEYI2

KEYI1

MONI

NO

0

NO

0

NO

NO

NO

NO

0

5MS

5MSC

SPM

5CC

5TC

REM

R433

R432

R431

D409

DC SW

Q306

SSM6J08FU(F)

C379

47k

R377

C380

1000p

LAMP

LEDG

LEDR

ENC2

ENC1

C381

0.1u

220p

DC SW

LTA023JEBFS8

270p

C382

C371

DC SW

Q307

REM

27k

R378

R357

560

0.027u

SSM3J05FU-F

100k

R379

C385

C384

VOL OUT

2.2

R380

Q308

C383

1000p

1000p

1000p

R:4.89V
T: 1.59V

5MS

INPTT

RXD

EXPTT

TXD

5RC

RESET

5M

SB

+B

5C

5T

5TC

5R

5CC
5RC

12A02CH

Q402

C374

0.056u
R350

18k

1000p

R351

100

100p

Q401

R438

C357

100u

7.5V

PROTECT

C352

1000p

SB

CN305

D401

OVER VOLTAGE
LIMITTER

D401

680

6.3

D301

C417

DZ2S036(0)

GN1G

1000p

C419

C418

1000p

R355

470

R358

47k

R354

1k

C353

0.047u
R359

330

R353

10k

Q301

LTC044EEBFS8

DC SW

+B

REVERSE CURRENT
PREVENTION

D302

RB521S-30

R305

10k

OFF:0.40V
ON:5.57V

C420

10u

R360

1.8k

C356

10u

C358

1000p

R363

R361

47k

4.7u

R464

R439

1k

1NC

2 VSS

3CE

D414,D415

B30-2261-05

LCD BACKLIGHT

27k

D414

D415

33k

330

R442

R444

OFF: 0V
ON:2.75V

C359

0.01u

R364

1k

REM

C361

0.22u

LTC044EEBFS8

C360

0.22u

DC SW

VOLTAGE
REGULATOR/5V

IC306

XC6209B502P-G

VoUT

D416

D417

1.2k

R447

220

R365

2.2k

Q302

7.5V

REG

5

C365

1000p

4VIN

VOLTAGE
DETECTOR/RESET

D416-D425

B30-2337-05

KEY BACKLIGHT

D420

D418D419

D421

1.2k

R449

R448

RXD

EXPTT

TXD

REM

SB

330k

R367

R368

270k

C367

5.01V

10u

C366

C354

D423 D422

1.2k

1.2k

R450

C424

0.01u

SP MUTE SW

Q303

2SK3577-A

R370

470k

1u

C369

SPM
5M

SB

5MS

+B

SSM3J05FU-F

R362

330k

4

VIN

1000p

1NC

IC305

XC6120N302N-G

R372

D424

D425

R451

C425

R374

AF AMP

0.047u

47k

3

2 VSS

LED
GREEN

B30-1782-05

LED
RED

B30-1779-05

1.2k

0.01u

Q305

2SK3577-A

10k

ON:4.99V
OFF: 0V

Q304

VoUT

C363

D426

DC SW

Q403

RT1N144U-T111

D427

DC SW

Q404

RT1N144U-T111

R466

0

AF AMP

0

R366

C372

DC SW

5MSC

RESET

1u

C364

1000p

D304

REVERSE CURRENT
PREVENTION

R445

220

R446

330

ON:3.30V

OFF: 0.51V

C373

10u

D304

C375

F301

0.315A

100p

R376

0

RB521S-30

1u

C376

OFF:0V
ON:4.98V

OFF:0V
ON:5.02V

100k

R453

10 PoUT

9 PW-GND

8 PRE-GND

7 PHASE

6NF

AF POWER AMP

4.7u
C377

100k

R452

IC307

TA7368PL

NC1

VCC

NC2

VIN

RIPPLE

IC308

XC6209B502P-G

4VIN

5 VoUT

VOLTAGE

1u

REGULATOR/5V

GREEN LED
ON:5.0V

RED LED
ON:5.0V

CN303

AF AMP
ON:7.49V
OFF: 0.33V

1

2

3

4

5

SPG

3CE

2VSS

1NC

BACKLIGHT
LED SWITCH

R437

3.3k

BACKLIGHT
CONTROL

J300

SP

J301

SWITCH

2SC4617(R)

B
C
A

2

C344

270p

1

C351

D305

DZ2S068(M)

SURGE
ABSORPTION

PTT/RXD

1

MIC

3
11

IM

10

5MS

2

1

SPG

3

TXD/REM
SPK

4

AFO

2

C347

1000p

CN300

+

2

SPK

1

-

SPG

4

ENC

S419

MIC300

INT MICINT MICINT MIC

5

MIC

INT SP

6

+B

BATT+

BATTERY
TERMINAL

BATT

GND

POWER SW
/AF VOLIUM

F300

3.15A

-

C345

VR300

7

26

X57-821 1/4

X57-821 1/1

F G H I

SCHEMATIC DIAGRAM

TH-K20A/K20E

J

TX-RX UNIT (X57-821X-XX)

5MS

5MSC
SPM

5CC

5TC

C330

SB

C331

REM

5MS

INPTT

270p

R332

270p

R331

56k

56k

R400

C386

220k

0.047u

R333

R334

R401

R403

R382

SHIFT

THERM

5VC

SPM

DAT

5CC

CLK

MONI

5MSC

71

72

73

74

75

CLK

5CC

76

77

78

79

47k

47k

KEYO4

C402

KEYO3

1000p

KEYO2

220k

KEYO1

220k

R383

8.2k

10k

KEYI1

KEYI2

KEYI3

KEYI4

KEYIT

KEYIS

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

97

98

99

100

DATA

5TC

VOLCS

VDCSW

CURRENT

VOX

REM

BATT

THERM

RSSI

SQL

LSDI

CVDET

KEYO4

KEYO3

KEYO2

VL1

VL2

VL3

SHIFT

KEYO1

VL4

KEYI1

KEYI2

KEYI3

KEYI4

KEYIT

KEYIS

HSDO

123456789

CN304

HSDO

MONI

LSDO

SPM

WKUPO

5MSC

VREF

5VC

MODE

SHIFT

THERM
CURRENT

LSDI
VOX

5MS
DAT
CLK
VDCSW

VOLCS

5VC

SEG30

SEG29

SEG28

SEG27

SEG26

SEG25

SEG24

SEG23

SEG26

BSFT

SEG25

INPTT

596061

SEG24

5RC

58

ENC2

SEG22

57

SEG23

ENC1

LEDG

LEDR

SEG31

62

63

64

65

66

67

686970

LEDR

LEDG

SEG31

XCIN

XCOUT

RESET

101112131415161718192021222324

47k

R465

SEG27

SEG28

SEG29

SEG30

MCU

IC401

R5F2L3ACCKEKA

XOUT

VSS

XIN

VCC

SEG21

56

SEG22

SEG21

RxD

SEG20

55

SEG20

TxD

SEG19

SEG18

SEG17

SEG16

51

525354

SEG16

SEG17

SEG18

SEG19

SEG15

SEG14

SEG13

SEG12

SEG11

SEG10

SEG9

SEG8

SEG7

SEG6

SEG5

SEG4

SEG3

SEG2

SEG1

SEG0

COM3

COM2

COM1

COM0

E2PIN

E2PCS

NC

LAMP

EX

PTT

W/N

PLLEN

PLLPS

PLLLD

25

SEG15

50

SEG14

49

SEG13

48

SEG12

47

SEG11

46

SEG10

45

44

43

42

41

40

39

38

37

36

35

34

33

32

31

30

29

28

27

26

CP1

SEG9

SEG8

SEG7

SEG6

SEG5

SEG4

SEG3

SEG2

SEG1

SEG0

COM3

COM2

COM1

COM0

LAMP

SHIFT

THERM

CURRENT

VDCSW

5MS

PLPS

PLLLD

DAT
CLK

PLLE

LSDI

VOLCS

5C

5RC

RESET

22u

22u

22u

8

7

6

5

CN311

CN308

C404

GND

22u

5.0V

C407

4.7k

R414

4.7k

R415

4.7k

R402

CLK
DAT

EXPTT

CN306

CN400

CN402

+B

C405

C406

4.7k

R405

5C

EEPROM

C427

RXD

EXPTT

TXD

E2PIN

E2PCS

LSDO

CVDET CVDET

CN310

CN309

7.51V

5T

5T

5M

SB

+B

5C

5T

5R

RSSI

SQL SQL

C428

IC400

EX25064ATA00A

1S

2Q

3W

4 VSS

5M

SB

CN307

1000p

0.01u

VCC

HoLD

C

D

5M

GND

RESET

CN401

R419

4.7k

MODE

CN403

1k

R422

C412

1p

12p

C411

Q400

2SC4649(N,P)

SWITCH

C413

0.1u
C414

1000p

L77-2974-05

11.0592MHz
X400

R424

1k

RSSI

5T

CN312

C415

5R

12p

R425

5.01V

470k

5RC

ENC2

ENC1

+B

CLK

5C

C341

R346

C342

0.01u

270k

1000p

R347

47k

DAT

LSDO

5VC

VOX

W/N

RSSI

SQL

5R

5T

EXPTT

E2PCS
E2PIN

+B

C340

R345

82k

0.01u

27

X57-821 1/1

X57-821 2/4

K L M

N

O

TH-K20A/K20E

SHIFT
THERM

VDCSW

5MS

PLPS

PLLD

DAT
CLK

PLLE

5C

LSDI

VOLCS

+B

LSDO

CVDET

5VC

VOX

5R

W/N
RSSI

5T

SQL

R41

MOD

3.9k

R303

10k

CV

FREQUENCY
CONTROL

D11

C37

R47

10k

R304

220n

C1

VCO

SPEED UP

C3

1u
C2

0.033u

R48

1k

D11

DA2S101

R27

2.2k

R28

0.15u
C38

D9

1M

L1

0.18u

D1,2

15k

1k

R4

R3

D1

820

C39

10

6.8u

R30

D10

DA2S101

R300

R301

R302

1SV325F

D3

RF SWITCH

D2

L2

180n

1SV325F

R5 1k

R2 2.7k

C4 0.022u

0.68u 20

R31

10k

10k

R32

Q6

LTC014EEBFS8

DC SW

DA2S101

CURRENT
STEERING

D/A CONVERTER

1

VIN2

2

VDD

1k

3

LD

1k

4

CLK

1k

5

DI

6

VIN3

0.047u

R308

1k

0.1u

C302

D4

MODULATOR

C5

39 p

C6

L3

10u

0.022u

C8

D3

1000p

Q1

LTC014EEBFS8

R6

100k

10k

10k

10k

10k

R34

R35

R33

23

24

VoUT1

VoUT2

R2A20178NP2

IC300

VoUT38VoUT49VIN410VIN511VoUT512VoUT6

7

C304

39 k

C307

R310

L4

27n

D4

L5

22n

HSC277

SHIFT

C9

PLL SYSTEM

MB15E03SL-E1

9 CLoCK

10 DATA

11 LE

12 PS

13 ZC

14 LD/FoUT

15 P

16 R

R36

R37

R38

19

20

21

VIN822VIN1

VoUT8

RESET

VDAREF2

VDAREF1

5.6k

R309

CURRENT
STEERING

KDR731

0.22u
D300

HVC350B

1u

IC1

oSCoUT

oSCIN

10k

10k

10k

VIN7

VoUT7

GND

VIN6

D5

FREQUENCY
CONTROL

C7

0.5p

R8

10k

R9

100k

R7

100k

C11

FIN

XFIN

GND

Do

VCC

VP

18

17

16

15

14

13

C306

1u

DATA

C305

1000p

8

7

6

5

4

3

2

1

CLK

1u

C301

R18

PLLEN

5MS

C10

L6

10u

D5

0

C12

Q1

TX/RX SW

R39

1000p

C41

0.1u

MCH3914(7)-H

8p

HVC350B

6.3

1u

5MS

10

C42

C43

0.01u

C44

1M

R307

SCHEMATIC DIAGRAM

VCO

C15

C17

C13

C46

1000p

0.01u

T0

1000p

Q3

10p

C19

L8

10u

9p

R12

220

Q2

2SC5383-T111

C18

1000p

C16

22u 10

4.98V

56

R40

2SC5383-T111

2.90V

C45

22p

TCXO

X1

19.2MHz

VCoNT

GND

oUTPUT

L77-3074-05

+B

5C

LSDI
POWC

BPF

C316

R319

C318

1k

R388

0.18u

R10

22

0.01u

C20

1000p

RIPPLE FILTER

D6

1000p

D6

SPEED UP

THERM
CURRENTCURRENT

VDCSW

VOLTAGE
REGULATOR/3V

Q7

VCC

0.18u

C317

180

R335

10k

R336

C332

R15 47k

0.70V

Q4

2SC5108(Y)F

C22

0.5p

RF BUFFER

4.15V

C23

R11

4.7k

DA2S101

10

R43

C48

0.01u

L13

4.7n

4p

C47

AF FILTER

IC302

NJM12904RB1

8V+

0.1u

7 BoUT

6 B-IN

5 B+IN

R320

56k

LTA023JEBFS8

5MS

R337

10k

10k

C333

8200p

1u

5R

W/N

RSSI RSSI

SQL SQL

R369

R14

1000p

C21

R45

R46

C49

AoUT

A+IN

0

Q300

C334

A-IN

GND

10k

1k

33k

100k

1000p

C335

0.027u

R338

1000p

C50

R339

C336

1

2

3

4

270p

5p

R321

1k

L9

C25

R389

R311

R386

R387

2.2k

DC SW

MIC AMP/LIMITER

NJM12904RB1

1

4

820p

120n

1000p

C26

C51

22p

82k

GND

C337

C338

15k

47k

33k

-

C27

47p

R313

R385

1k

R322

3.3k

C319

0.18u

IC304

+

C28

9p

L10

27n

15p

R312

C29

47k

47k

C308

R:1.80V
T:1.81V

V+

-

+

0.01u

1000p

1.80V

15p

0.1u

C321

C320

0.18u

5VC

8

5

C31

12p

LSD BUFFER

IC301

NJM12904RB1

1

2

-

3

4

GND

1k

R323

0.18u

C322

0.39u

R325

470

C324

0.18u

1k

R340

R19

R20

++-

C325

RF AMP

5.6k
2SC5636

3.3k

R21

V+

R:4.89V
T: 1.59V

0.1u

R326

5.6k

R342

560k

C339

10p

R341

Q5

C32

330

1000p

5MS

C310

8

7

R315

6

560k

5

C311

820k

R314

QT/DQT FILTER

IC303

NJM12904RB1

8V+

7

6

-++

5

0

TX-RX UNIT (X57-821X-XX)

C34

15p

82n

L11

3.3k

R22

C33

10

R23

1000p

5C

5.0V

0.1u

C312

4700p

0.027u

R316

R317

LSDI

5MS

R328

10k

R329

330k

1

C326

180p

R327

2

-

GND

100k

3

4

R24

TX/RX SW

10k

C313

R318

3.9k

C314

5R

C327

D8

HSC277

D7

HSC277

3.3k

D7,8

0.1u

2.7k

0.01u

C328

4700p

R:1.03V
T:1.74V

R330

C329

R25

5R

0.01u

100k

2.2u

10k

R:4.88V
T: 1.59V

CURRENT

VDCSW

TCXO OUT

RXLO

THERM

POWC

BPF

W/N

+B

5R

5T5T

28

X57-821 3/4

X57-821 1/1

P Q R S T

SCHEMATIC DIAGRAM

TH-K20A/K20E

TX-RX UNIT (X57-821X-XX)

RXLO

THERM

5T

CURRENT

RFM01U7P

10

Hi:1.49V

R108

Mid:1.28V
Lo:1.21V

100k

R109

R26

C36

DRIVE
Q102

R111 82k

Hi:3.25V

Mid:2.78V

Lo:2.63V

4.7k

1000p

1000p

C109

C101

1

L110

C136

1000p

D101,102,103,104

ANT SW

270

L112

9T

22p

C144

R: 0V
T:4.93V

C156

330

C137

D105

1000p

L109

C138

C159

9T

6p

12p

C139

D103

RN142S

2.2u

C140

27p

R: 0V
T:0.81V

R119

0

RN142S

C141

ANT

CN2

12p

9T

6p

2

18p

D104

C146

RN142S

3

1000p

C135

C157

6p

L108

1000p

HVC131

HVC131

R126

D101

D102

2.2u

270

R128

R124

FINAL

Q103

68k

1000p

R114

R115

47

Hi:1.48V
Mid:1.27V
Lo:1.21V

56k

R102

RD07MUS2BT112

R116

0

Temp compensation

C153

C115

1000p

R103

2.2k

Q101
2SC4926YD

PRI DRIVE

R:0V

1k

T:0.61V

C104

1000p

R: 0V
T:4.91V

1000p

R104

100k

-t

B57331V2104J

TH101

18

R121

R105

C105

39 k

330

1000p

C161

C151

L103

R107

C147

100n

R: 0V
T:4.32V

18

1u

C113

56p

47

82n

L105

R112

F101

C112

0.01u

L101

68n

C102

1000p

0.5A 32V

R113

C150

R: 0V
T:1.09V

R101

18

0.1u

C110

22p

0.01u

2.2u

C162

C152

C148

1000p

1000p

C106

1000p

L106

R130

L113

3T

9T

0

C107

1000p

9p

C125

L114

L115

5T

47p

39 p

C127

C108

L104

15p

POWC

15p

C129

33n

CURRENT

R120

1.8k

C134

L107

6T

6T

1000p

27p

C133

C154

VDCSW

TCXO OUT

+B

POWC

BPF

5R

W/N
RSSI

5T

SQL

RXLO

C323

R324

560

3300p

R200

R232

47

0

C200

L217

5R

82n

R201

10u

C202

C272

C271

1p

C270

D204

C201

1000p

1.5k

C205

0.01u

LTA023JEBFS8

3p

39 p

HVC350B

R203

C203

R204

C204

0.1u

W:0V
N:5.01V

C273

1p

1M

R251

R252

4.7k

C206

270p

C207

270p

68k

IC200

TA31136FMG

270p

3.3k

R205 2.2k

L79-1474-05

1800p

CD200

Q200

W/N

2p

82n

L209

C245

D200,201,204

BPF TUNING

C208

330k

R206

8

FILIN

AFoUT

9

C209

R207

W/N SW

C246

D200

C211

FILoUT

QUAD

47p

2.7k

RSSI

39 p

1M

HVC350B

R233

L72-1042-05

CF200

0.1u

0.1u

IFIN

DEC

IFoUT

C248

1p

VCC

RSSI

C212

SQL

C249

1M

D201

R234

C247

1000p

450kHz

C213

MIXoUT

NOISEREC

NOISEDET

C214

0.033u

18k

R208

39 p

HVC350B

R253

4.7k

0.1u

1

OSCoUT

GND

16

0.1u

R210

68k

C250

C215

0.01u

OSCIN

MIXIN

7.5V

82n

L211

R248

2p

47

R235

C251

C254

1000p

C218

5p

22p

560n

L200

C216

FM IF

SYSTEM

R249

C217

1k

0.01u

TH200

NCP18WM474J0S

-t

R:4.88V
T: 1.59V

R236

82

1.5k

1000p

R:4.68V
T: 1.53V

L201

R212

C253

560n

100

L202

R213

1000p

C219

C220

820n

C221

47

Q204

3SK318

R237

DOUBLER

22p

1000p

0.01u

470

R214

330k

Q201

KTC4080E-P

R:0.72V
T: 0.71V

R216

180k

Q202
KTC4080E-P

0

R215

RF AMP

R240

BPF

IF AMP

100k

R238

R:4.88V
T: 1.59V

TCXO OUT

R:0.61V
T: 0.59V

R218

1k

C223

0.01u

100k

R:3.85V
T: 1.26V

R239

R220

680

39 0k

C255

1000p

L71-0669-05

1st IF(38.85MHz)
XF200

VDCSW

R:4.98V
T: 0V

R241

C226

R:3.11V
T: 1.03V

180k

C227

8p

5R

R221

330

LTC014EEBFS8

C256

47p

R243

C259

L215

2.7n

C228

0.01u

6p

C234

Q104

C155

VDC SW

1M

1000p

BPF TUNING

L206

R225

0.01u

C261

D203

C229

R226

820n

47

1000p

5p

0

39 p

L213

L214

HVC350B

L204

22n

C230

10p

3.3k

R247

C235

1000p

68n18n

C231

C237

R125

CN202

R227

C266

R228

22p

0.39

0.39

R129

0.39

R127

C160

1000p

4

C265

47p

5

3p

100p

C232

5p

120n

L205

C233

1000p

R:2.68V
T: 0.89V

1k

MIXER

Q203
3SK318

330

C239

1000p

R229

C240

82k

1000p

R230

R246

R:2.44V
T: 0V

82k

R231

100k

C244

6

1000p

82k

7

Note : The components marked with a dot (•) are parts of layer 1.

29

X57-821 1/1

X57-821 4/4

TH-K20A/K20E

TX-RX UNIT (X57-821x-xx )

BLOCK DIAGRAM

D426

B30-1782-05

BUSY

(GRN)

D427
B30-1779-05

TX

(RED)

B38-0939-05

LCD

D414,D415 B30-2261-05
D416~D425 B30-2337-05

LCD/KEY BACKLIGHT

KEY MATRIX

PTT

MONI

S419

W02-3766-05

ENC

BATT+

7.5V

BATT-

VR300

R31-0684-05

VOL/PSW

S418

S417

F300

3.15A

SB

5MS

DCSW

Q403

LTC014EEBFS8

5MS

DCSW

Q404

LTC014EEBFS8

COM0~COM3,SEG0~SEG31

PROTECT

D301
GN1G

VOLIN

VOLOUT

LEDG

LEDR

Q401

12A02CH

DCSW DCSW

SB

INPTT

MON

ENC1

ENC2

D404~D407
1SS388
D408~D411

MA2S111-F

DIODE
MATRIX

+B

D302
RB521S-30

PROTECT

2SC4617(R)

Q6

LTC014EEBFS8

PLLD

INVERT

2SC5383-T111

Q402

LAMP

LEDG
LEDR
PLLE

DAT

CLK

KEYI1~KEYI4,KEYIS,KEYIT
KEYO1~KEYO4

BATT
RESET
EXPTT
INPTT

BATT

IC306

XC6209B502P-G

AVR

5V

5M

RESET

IC305

XC6120N302N-G

Q7

SB

MB15A02PFV2E1
PLPS
PLLE

DAT
CLK

LD

3.3V
REG

5C

L77-1944-05

LSDO

IC300(6/8)

R2A20178NP

FREQ

5MSC
5TC
5RC
5CC

PLLD
ENC1
ENC2
MON

D304
RB521S-30

PROTECT

Q304

SSM3J05FU-F

DC SW

5MSC

RESET

IC1

PLL SYSTEM

TCXO

19.2MHz

X1

5C

D/A

CONV.

5MS

XOUT

X400

L78-2974-05

11.0592MHz

5MS

LOOP

FILTER

ASSIST

MCU

IC401

R5F2L3ACCKEKA

XIN

BSFT

SW

Q400
2SC4919-S

IC308

XC6209B502P-G

AVR

5V

5CC

LPF

D4
HVC350B

MOD

5MS

D/A

CONV.

D5
HVC350B

IC300(5/8)

R2A20178NP

VCO oscillation frequency
RX: 174.850~212.845MHz(K,M,E)

TX: 136.000~173.995MHz (M)

144.000~147.995MHz (K)

144.000~145.995MHz (E)

5M

CLK

DATA
E2PIN
E2PCS

EEPROM

IC400

BR255640FV1-W

Q308

DC SW

5TC

Q307

LTA023JEBFS8

DC SW

5RC

Q3
MCH3914(7)-H

D1,D2

1SV325F

VCO

SHIFT

SW

SHIFT

THREM
CURRENT
RSSI
SQL
VOX
LSDI

VDCSW
WIID/NAR
HSDO

SPM

5M

5C

SSM3J05FU-F

5T

5R

Q1
LTC014EEBFS8

D3
HSC277

2

30

TH-K20A/K20E

BLOCK DIAGRAM

RX: 136.000~173.995MHz (K,M,E)
TX: 136.000~173.995MHz (M)

144.000~147.995MHz (K)

144.000~145.995MHz (E)

D103-D105

+B

RF

5R

RN1425
D101,D102
HVC131

ANT SW

RF BPF

TUNE

IC300(7/8)

R2A20178NP

5T

BPF

-t

TH101

THREM

D203
HVC350B

ANT

Q4

2SC5108(Y)F

BUFF

AMP

S8

RIPPLE
FILTER

5C

19.2MHz

WID/NAR

2SC5636

Q2

2SC5383-T111
D6
DA2S101

Q201

KTC4080E-P

DOUBLER

5R

SQL

RSSI

L79-1474-05

LTA023JEBFS8

Q5

RF

AMP

5C

CD200

DC SW

Q200

2nd Local

38.4MHz

AFO

D7,D8

HSC277

TX/RX

SW

5T

5R

IC200
TA31136FMG

IF SYSTEM

CD

L72-1042-05

Q101

2SC4926YD

PRE

DRIVE

5T

VDCSW

1st Local frequency

174.850~212.845MHz(K,M,E)

5R

CF200

VDC SW

Q104

LTC014EEBFS8

Q202

KTC4080E-P

IF

AMP

5R

Q102

RFM01U7P

DRIVE

AMP

MCF

38.85MHz

XF200

L71-0669-05

RD07MUS2BT112

F101

0.5A

IC300(8/8)
R2A20178NP

POWC

MIXER

5R

Q103

FINAL

AMP

CURRENT

D/A

CONV.

5MS

Q203
3SK318

BPF

RF BPF

TUNE

D200,D201,D204

HVC350B

BPF

Q204

3SK318

AMP

D/A

CONV.

LSDI

VOLIN

IC303
NJM12904RB1

QT/DQT
FILTER

IC302
NJM12904RB1

AF

FILTER

D/A

CONV.

IC300(2/8)
R2A20178NP

5MS

5MS

450kHz

MOD

VOX

VOLOUT

SB

IC300(3/8)

R2A20178NP

D/A

CONV.

VOX DET

D300

KDR731

HSDO

F301

0.315A

IC307

TA7368FG

AF POWER AMP

Q306
SSM6J08FU(F)

DC SW

IC304

NJM12904RB1

MIC AMP
LIMITER

DC SW

Q300

LTA023JEBFS8

5MS

HSDO

5VC

Q305

2SK3577-A

MUTE

SW

Q301

LTC044EEBFS8

DC SW

SPM

IC301

NJM12904RB1

V REF/

MIC AMP

5C

5MS

Q303

2SK3577-A

MUTE

MUTE

SW

SW

DC SW

IC300(1/8)
R2A20178NP

D/A

CONV.

Q302

LTC044EEBFS8

EXPTT

5MS

J301

E11-0717-05

CN300

J300

E11-0484-05

MIC300

T91-0673-05

MIC

SPG
TXD
SPK
AFO

PTT/RXD
MIC
IM

5MS

EXT
SP

INT
SP

EXT
MIC

INT
MIC

31

TH-K20A/K20E

FM IF

SYSTEM

DAC

SSG

–53dBm

ANT

–56.1dBm –74.2dBm –66.8dBm –50.8dBm –52.8dBm –40.3dBm –57.1dBm –29.1dBm 31mVrms 27mVrms 2.4Vrms 2.3Vrms 2.0Vrms

C265 C256 C248 C273 C228 C223 C217 C322 C381 C357

SP

500mW

Q303Q305IC307IC300IC200Q202XF200MIXER

Q203

Q204

RF (CENTER FREQUENCY) IF1 (38.85MHz)

IF2

450kHz

AF (1kHz)

IC300

DAC

AF

AMP

C22

–29.1dBm

VCO

C27 C34 C113

7.3dBm

C134

34.9dBm

ANT

50Ω

MIC

8.0mVrms 4.4mVrms

37.4dBm

C101

12.2dBm
C107

Q4 Q5

RXLo

D7

D8

Q101 Q102 Q103

AF (1kHz) RF (CENTER FREQUENCY)

R303

+

LEVEL DIAGRAM

To make measurements in the AF section, connect the AC level meter.

(ANT input: –53dBm,1kHz FM, 1.5kHz Dev (Narrow).)

In the RF section, use a high impedance probe. (ANT input: –53dBm, MOD off).

AG is set to the MIC input becomes 1.5kHz Dev, at 1kHz MOD. (Narrow)

To make measurements in the AF section, connect the AC level meter.

In the RF section, use a 1000pF coupling capacitor.

–2.5dBm

–1.8dBm

–9.1dBm

32

Receiver Section

Transmitter Section

Q3

TH-K20A/K20E

OPTIONAL ACCESSORIES

BT-16 (Battery Case (6AAA/LR03))

External View

■

KNB-65L (Li-ion Battery Pack)

External View

■

Specifi cations

■

Voltage ............................................................................ 7.4V

Battery capacity ................................................ typ 1520mAh

min 1460mAh

EMC-11 (Clip Microphone with Earphone) KVC-22 (DC Vehicular Chager Adapter)

External View

■

Specifi cations

■

Earphone unit

Impedance ................ 72 ±15% (16 ±15%: Speaker only)

Nominal input power .................................................. 20mW

External View

■

Microphone unit

Impedance .........................................................1.5k ±30%

Sensitivity .......................................–42dB±3dB (at 1000Hz)

33

TH-K20A/K20E

MEMO

34

TH-K20A/K20E

SPECIFICATIONS

General

Guaranteed range (MHz) TX & RX 144~148 (K/M) / 144~146 (E)

Operation Frequency range (MHz)

Mode F3E, F2D

Antenna impedance 50

Operating temperature range –20°C ~ +60°C (+4°F ~ +140°F)

Operating Voltage DC 6.0 ~ 9.0V (7.4V nominal)

Frequency stability Within ±2.5ppm

Dimensions W x H x D (projections not included) <with KNB-63L> 54 x 111.7 x 25.3 mm / 2.13 x 4.4 x 1.0 in

Weight <with KNB-63L> Approx. 210g / 7.4oz.

Transmitter

RF output power <with KNB-63L/ KNB-65L>

Modulation Reactance

Maximum frequency deviation Within ±5kHz

Spurious emission Less than -60dB

Modulation distortion Less than 5% (300Hz~3kHz)

Microphone impedance 2k

Receiver

Circuit type Double super heterodyne

Intermediate Frequency (IF) 1st IF: 38.85MHz 2nd IF: 450kHz

Sensitivity (12dB SINAD) Less than 0.16µV

Squelch sensitivity Less than 0.13µV

Selectivity

Audio output More than 400mW (8/ 10% distortion)

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

Guaranteed frequency range .............................................................. 144~148MHz (K,M)

144~146MHz (E)

TX 136~174 (M) / 144~148 (K) / 144~146 (E)

RX 136~174



High 5.5W

Medium 2W

Low 1W



-6dB More than 10kHz

-50dB Less than 28kHz

35

TH-K20A/K20E

JKLMNOPQRSIHGFEDCBA

TH-K20A/K20E PC BOARD PC BOARD TH-K20A/K20E

1

1

TX-RX UNIT (X57-821X-XX) 0-11: K 0-20: M 2-71: E

2

3

4

5

6

7

8

9

Component side view (J79-0325-09)

J79-0325-09

D419

R448

D409

D408

D405

D421

D404

R449

R451

R450

D423

D425

CV

R433

D410

R432

D411

R431

D406

D418

D420

D422

D424

D415

MIC300

C344

D416

76

75

D407

CN202

100

1

5R

Q400

R422

C412

C411

F424

R447

D417

R425

X400

C415

IC401

25

MODE

26

CN304

CN303

GND

RESET

51

50

CP1

5M

D301

C352

F300

+B

+B

IC305

GND

TX-RX UNIT (X57-821X-XX) 0-11: K 0-20: M 2-71: E
Component side view (J79-0325-09)

C423

R440

R443

C383

1

IC308

R377

3

C380

C358

4

IC306

5

C365

C366

C354

4

3

CN300

R362

C329

Q304

5M

S

1

2

C364

C363

2

SPK

SPG

1

Q308

5T

R379

D304

D302

3

1

D

D

G

C377

5

C375

4

SB

R372

G

C322

C321

R323

R358

R351

R365

R364

S

R355

R363

5C

C376

C374

R374

GND

C304

R309

R350 and

C356

R360

Q303

R305

D305

Q305

G

S

C359

C301

D

S

G

D

C367

C369

18

19

IC300

24

1

R300

R301

D300

C351

R354

C353

R370

13

6

R302

C302

R310

C307

12

7

R308

R368

R304

R376

6

10

Q302

C305
R307

C306

IC307

R303

R366

C372

C373

Q301

R359

C334

R339

C342

R347

C379

5

1

Q306

R378

C360

R367

SB

R335

R337

R336

C333

R338

C336

1

IC304

45

R340

C339

R345

R346

R342

C341

C314

R318

C340

R353

C421

R441

C381

D

G

S

D

F301

Q300

R357

C312

R315

C310

R312

C371

C335

R470

R314

C311

5

4

IC301

8

1

R311

R313

C308

R466

R389

C425

C332

C337

C338

R341

R317

C313

8

R316

R446

R380

R445

2

3

4

5

6

7

D427

D426

8

9

10

11

12

13

14

Ref. No. Address

IC300 6O
IC301 8Q

IC304 6P

IC305 6M

IC306 5N

IC307 4P

IC308 4N

IC401 6J

Q300 6Q

Q301 5P

Ref. No. Address

Q302 5P

Q303 4O

Q304 7N

Q305 4O

Q306 5P

Q308 4N

Q400 7H

D300 8O

D301 5M

D302 5N

Ref. No. Address

D304 5N

D305 9O

D404 5C

D405 5D

D406 5E

D407 5F

D408 5D

D409 5E

D410 5E

D411 5E

Ref. No. Address
D414 10J
D415 2J

D416 4G

D417 8G

D418 3F

D419 3D

D420 5F

D421 5D

D422 7F

D423 7D

Ref. No. Address
D424 9F

D425 9D

D426 8R

D427 7R

D414

Component side

Layer 1
Layer 2
Layer 3
Layer 4

10

11

Foil side

12

13

14

JKLMNOPQRSIHGFEDCBA

TH-K20A/K20E PC BOARD PC BOARD

1

TH-K20A/K20E

1

TX-RX UNIT (X57-821X-XX) 0-11: K 0-20: M 2-71: E

2

3

4

5

6

7

8

9

Foil side view (J79-0325-09)

C141

C345

VR300

Q404

Q403

R453

R452

C424

S419

J301

C357

S418

L110

+

C347

PTT

C139

C140

C138

L109

C137

C136

C157

D102

R128

J300

D101

C317

C320

R325

R126

C325

S417

MONI

L214

L213

C261

C427

C428

C129

R243

8

1

R402

D203

C256

R241

R414

IC400

R415

L114

C259

R405

5

4

R240

C419

R238

Q204

G

G

C255

R239

C417

C160

C154

C253

S

D

D401

C420

L108

C135

C134

L107

L112

C144

R319

C318

R388

R320

5

4

IC302

1

8

R386

C319

R385

R322

R326
C324

5

4

IC303

1

8

C328

R328

R387

C326

D103

R321

C327

R327

R329

R330

R361

C316

R369

C361

D105

R119

C146

D104

L115

C133

C265

C406

C407

C404

C405

R438

Q401

C127

R236

R439

C418

R437

Q402

R129

R237

R248

C386

R382

C125

L113

C254

R332

C331

C251

R464

R444

R127

R235

L211

R442

C330

D201

C250

R334

R125

R383

R331

C249

R333

C247

R234

C248

R233

C402

R130

C151

D200

C246

R401

C162

C161

C152

R400

C245

C323

R403

C204

R324

R121

C153

L106

L209

CD200

TH101

C272

R419

R251

C273

C413

D204

C203

R204

C271

C414

R465

C270

Q103

R207

L217

R205

R232

R203

C211

GD

C244

C205

R201

C202

R231

Q200

R115

C115

C150

C207

8

9

TX-RX UNIT (X57-821X-XX) 0-11: K 0-20: M 2-71: E
Foil side view (J79-0325-09)

C105

R116

C240

R230

CF200

C206

R206

C209

C113

R246

R229

R252

R114

IC200

R112

R113

G

Q203

C208

C233

SG

D

C214

R208

C212

L105

F101

D

C112

C213

C239

R253

1

16

S

Q102

C156

R120

R228

C201

R249

R210

C110

R227

C237

R200

R213

L202

G

R111

C109

C159

R124

R247

C200

C221

C108

L104

R109

Q104

C235

L206

R226

C217

TH200

R108

C155

R215

C104

R225

Q202

C215

C107

C

E

C232

R104

C266

L205

C228

R220

C223

C106

Q101

R216

R103

C385

C234

R221

R105

E

B

Q307

XF200

R43

C216

C218

R212

L103

C227

R28

R107

C148

C147

R101

R27

C48

L200L201

R102

C382

C231

C219

C220

C102

L204

C230

C229

R41

C49

C44

C101

C384

+

L101

C226

Q201

L215

C37

C38

R24

C34

D8

R22

R26

L11

C36

R25

X1

C50

R214

R218

R11

C18

C47

C33

D7

Q2

+

C16

D6

C21

L2
D1

D2

L5

L1

C6
D3

C1

L3

16

C39

+

1

L13

C45

C51

R39

R23

R21

C32

Q5

C26

R20

R19

C13

C5

L4

R8

D5

D4

Q1

C8

R6

R5

IC1

C43

C41

C28

C29

C31

C27

L9

R15

R10

D

Q3

G

S

C7

C15

C10

L6

C17

C19

L8

R12

C20

R48

C9

D11

C4

R2

R9

R35

R37

R38

9

R32

R34

C42

8

R30

C46

R40

Q7

R45

R46

2

3

L10

C25

R14

Q4

C23

C12

C22

+

R18

C11

D9

D10

R47

C2

C3

R3

R4

R7

4

5

6

7

R33

R36

R31

Q6

8

9

10

11

12

13

14

Ref. No. Address

IC1 8Q

IC200 8M

IC302 6G

IC303 7F
IC400 8I

Q1 6Q

Q2 4P

Q3 5Q

Q4 4Q

Ref. No. Address

Q5 3Q

Q6 8R

Q7 9Q

Q101 4N

Q102 3N

Q103 4L

Q104 4N

Q200 8M

Q201 9O

Ref. No. Address
Q202 8N

Q203 6M

Q204 6J

Q307 4O
Q401 9J

Q402 8J

Q403 8C

Q404 7C
D1 5P

Ref. No. Address
D2 5P

D3 6P

D4 5Q

D5 5Q

D6 5P

D7 4P

D8 3P

D9 5R

D10 6R

Ref. No. Address

D11 6Q

D101 4F

D102 4F

D103 4G

D104 5H

D105 4G

D200 6K

D201 6K

D203 5I

Ref. No. Address

D204 6L

D401 8J

J79-0325-09

Component side

Layer 1
Layer 2
Layer 3
Layer 4

Foil side

10

11

12

13

14

PTT

MONI

ENC

S419

MIC300

INT MICINT MICINT MIC

MIC

J300

INT SP

+B

BATT+

BATTERY
TERMINAL

BATT

GND

POWER SW
/AF VOLIUM

TX-RX UNIT(X57-821X-XX)

LCD

COM0

COM1

COM2

COM3

SEG0

SEG1

SEG2

47K

R470

INPTT

100

R441

S418

1000p

C421

S417

C423

1000p

BACKLIGHT
LED SWITCH

R437

3.3k

BACKLIGHT
CONTROL
SWITCH

2SC4617(R)

B

C

A

2

0.056u

C344

270p

1

C351

D305

DZ2S068(M)

SURGE
ABSORPTION

PTT/RXD

1

MIC

3
11

IM

10

5MS

2

SP

J301

1

SPG

3

TXD/REM
SPK

4
2

AFO

C347

1000p

CN300

2

+

SPK

1

-

SPG

F300

3.15A

-

C345

VR300

Q401

12A02CH

Q402

C374

R350

18k

1000p

R351

100

PROTECT

C352

100p

100u

7.5V

R438

C357

1000p

CN305

SB

D401

OVER VOLTAGE
LIMITTER

D401

680

6.3

D301

SEG3

SEG4

C417

DZ2S036(0)

R353

10k

GN1G

SEG5

SEG6

SEG7

SEG8

47k

R440

100

R443

OFF:0.40V
ON:5.57V

C420

1000p

10u

C419

C418

1000p

R360

R355

470

C356

R358

47k

R354

1k

C353

0.047u
R359

330

Q301

LTC044EEBFS8

DC SW

+B

REVERSE CURRENT
PREVENTION

D302

RB521S-30

R305

10k

C358

SEG9

1000p

1.8k

10u

SEG10

R464

R439

R363

1k

R361

47k

4.7u

SEG11

SEG12

SEG13

S401

9

S405

6

S409

3

S413

D

D414,D415
B30-2261-05

LCD BACKLIGHT

27k

D414

33k

330

R442

OFF: 0V
ON:2.75V

C359

0.01u

REM

C361

C360

0.22u

DC SW

VOLTAGE
REGULATOR/5V

IC306

XC6209B502P-G

1NC

2VSS

3CE

SEG14

SEG15

SEG16

SEG17

SEG18

SEG19

SEG20

S402 S403 S404

#

S406

S410

0

S407

8

5

S411

1

S414

D415

S415

C

D416

B

D416-D425
B30-2337-05

KEY BACKLIGHT

D418D419

D417

1.2k

1.2k

R447

220

R444

R448

R364

R365

1k

2.2k

0.22u

R367

R368

Q302

LTC044EEBFS8

7.5V

5.01V

REG

5

VoUT

10u

C365

C366

1000p

4VIN

VOLTAGE
DETECTOR/RESET

SEG21

SEG22

D420

D421

1.2k

R449

RXD

EXPTT

TXD

REM

SB

330k

270k

R370

470k

1u

C367

C354

1000p

XC6120N302N-G

SEG23

SEG24

SEG25

S408

7

S412

42

S416

A

REVERSE CURRENT
PREVENTION

D423 D422

1.2k

R450

C424

0.01u

SP MUTE SW

Q303

2SK3577-A

C369

SPM
5M

SB

5MS

+B

SSM3J05FU-F

R362

330k

4

VIN

1NC

IC305

D404-407

D424

D425

C425

0.047u

R372

SEG26

SEG27

1SS388F

1SS388F

1SS388F

1SS388F

LED
GREEN

1.2k

R451

0.01u

2SK3577-A

R374

AF AMP

Q304

47k

3

VoUT

2VSS

SEG28

D404

D405

D406

D407

Q305

10k

SEG29

SEG30

D426

B30-1782-05

RT1N144U-T111

LED
RED

B30-1779-05

RT1N144U-T111

R466

R366

ON:4.99V
OFF: 0V

DC SW

5MSC

C363

1000p

SEG31

D408

D409

D410

DA2S101

D411

DA2S101

R445

220

DC SW

Q403

D427

R446

330

DC SW

Q404

0

AF AMP

OFF: 0.51V

C373

0

C372

10u

RESET

1u

C364

D304

REVERSE CURRENT
PREVENTION

R431

R432

R433

F301

0.315A

ON:3.30V

D304

C375

D408-D411

Key matrix

OFF:0V
ON:5.02V

R453

10 PoUT

100p

R376

0

RB521S-30

1u

4.7u

C376

0-20

0-11

2-71

OFF:0V
ON:4.98V

100k

R452

IC307

TA7368PL

9 PW-GND

8 PRE-GND

7PHASE

6NF

AF POWER AMP

XC6209B502P-G

4 VIN

5 VoUT

VOLTAGE

1u

C377

REGULATOR/5V

X57-8210-XX

0-20

0-11

2-71

100k

NC1

VCC

NC2

VIN

RIPPLE

IC308

M

K

DA2S101

E

DA2S101

GREEN LED
ON:5.0V

RED LED
ON:5.0V

CN303

AF AMP
ON:7.49V
OFF: 0.33V

1

2

3

4

5

SPG

3CE

2VSS

1NC

D408

NO

DC SW

Q306

SSM6J08FU(F)

C379

47k

R377

C380

1000p

D409

DA2S101

DA2S101

NO

KEYO4

KEYO3

KEYO2

KEYO1

KEYIT

KEYI4

KEYI3

KEYI2

KEYI1

MONI

LAMP

C381

0.1u

220p

DC SW

LTA023JEBFS8

270p

C382

R431

LEDG

LEDR

ENC2

ENC1

Q307

0

NO

NO

C371

DC SW

R432

NO

0

NO

REM

27k

R378

R357

560

0.027u

SSM3J05FU-F

100k

R379

C385

C384

R433

NO

NO

0

VOL OUT

2.2

R380

Q308

C383

1000p

1000p

1000p

R:4.89V
T: 1.59V

SHIFT

THERM

5MS

5MSC

SPM

5CC

5TC

REM

5MS

INPTT

RXD

EXPTT

TXD

5RC

5RC

5MS

5MSC
SPM

5CC

5TC

REM

5MS

INPTT

RXD

EXPTT

TXD

5VC

SPM

DAT

5CC

CLK

MONI

5MSC

71

72

73

74

75

5CC

76

77

R331

56k

270p

R332

270p

47k

R333

56k

47k

R334

C330

SB

C331

78

79

80

81

82

83

84

85

86

87

88

89

90

C402

1000p

KEYO4

KEYO3

KEYO2

91

92

R400

220k

R401

220k

KEYO1

93

94

95

96

LSDO

C386

R403

0.047u

R382

220k

R383

8.2k

E2PIN

10k

E2PCS

EEPROM

C427

1000p

0.01u

C428

IC400

EX25064ATA00A

1S

VCC

2Q

HoLD

3W

4VSS

KEYI1

KEYI2

KEYI3

KEYI4

KEYIT

KEYIS

22u

C404

8

7

6

C

5

D

22u

C405

22u

C406

4.7k

R405

5.0V

R414

22u

C407

4.7k

4.7k

R415

97

98

99

100

4.7k

R402

CLK

DAT

EXPTT

DATA

5TC

VOLCS

VDCSW

CURRENT

VOX

REM

BATT

THERM

RSSI

SQL

LSDI

CVDET

KEYO4

KEYO3

KEYO2

VL1

VL2

VL3

SHIFT

KEYO1

VL4

KEYI1

KEYI2

KEYI3

KEYI4

KEYIT

KEYIS

HSDO

123456789

CN304

HSDO

5M

CN400

CN402

GND

CLK

RESET

CN401

MONI

LSDO

SPM

WKUPO

R419

4.7k

70

5MSC

VREF

MODE

69

5VC

MODE

R465

CN403

12p

C411

CVDET CVDET

RESET

5M

SB

+B

5C

5T

5TC

5R

RESET

7.51V

CN309

5M

SB

CN307

5T

CN311

CN308

GND

5C

+B

CN306

5M

SB

+B
5C

5T

CN310

5R

SHIFT
THERM
CURRENT

LSDI

VOX
5MS

DAT
CLK
VDCSW
VOLCS
5VC

SEG30

SEG29

SEG28

SEG27

SEG26

SEG25

SEG24

SEG23

SEG26

60

SEG25

INPTT

59

SEG24

5RC

58

SEG23

ENC2

SEG22

57

SEG22

ENC1

SEG31

LEDG

LEDR

61

62

63

64

65

66

67

68

LEDR

LEDG

SEG31

XCIN

XCOUT

RESET

101112131415161718192021222324

SEG27

SEG28

SEG29

SEG30

MCU

IC401

R5F2L3ACCKEKA

XOUT

VSS

XIN

VCC

BSFT

47k

ENC2

5.01V

ENC1

R422

L77-2974-05

1k

11.0592MHz

C412

C413

0.1u
C414

1000p

X400

1p

12p

C415

R424

Q400

1k

2SC4649(N,P)

SWITCH

R425

470k

5RC

5R

CN312

SEG21

56

SEG21

RxD

SEG20

55

SEG20

TxD

SEG19

54

SEG19

W/N

SEG18

53

SEG18

PLLEN

SEG17

52

SEG17

PLLPS

+B

SEG16

51

SEG16

SEG15

SEG14

SEG13

SEG12

SEG11

SEG10

SEG9

SEG8

SEG7

SEG6

SEG5

SEG4

SEG3

SEG2

SEG1

SEG0

COM3

COM2

COM1

COM0

E2PIN

E2PCS

LAMP

PTT

PLLLD

25

NC

EX

EXPTT

E2PCS
E2PIN

C340

0.01u

SEG15

50

SEG14

49

SEG13

48

SEG12

47

SEG11

46

SEG10

45

44

43

42

41

40

39

38

37

36

35

34

33

32

31

30

CP1

SEG9

SEG8

SEG7

SEG6

SEG5

SEG4

SEG3

SEG2

SEG1

SEG0

COM3

COM2

COM1

COM0

29

28

27

LAMP

26

CLK
DAT

5C

C341

0.01u

R346

270k

R345

82k

C342

1000p

R347

47k

SHIFT

THERM

CURRENT

VDCSW

5MS

PLPS

PLLLD

DAT
CLK

PLLE

LSDI

VOLCS

LSDO

5VC

VOX

5C

+B

5R

W/N

RSSI

SQL

5T

5CC
5RC

RSSI

SQL SQL

5T

RSSI

5T

SHIFT
THERM

VDCSW

5MS

PLPS

PLLD

DAT
CLK

PLLE

5C

LSDI

VOLCS

+B

LSDO

CVDET

5VC

VOX

5R

W/N
RSSI

5T

SQL

R41

MOD

3.9k

R303

10k

CV

FREQUENCY
CONTROL

D11

C37

R47

10k

R304

220n

C1

VCO

SPEED UP

C3

1u
C2

0.033u

R48

1k

D11

DA2S101

R27

2.2k

R28

0.15u
C38

D9

1M

L1

0.18u

D1,2

R4

15k

R3

1k

820

10

6.8u

R300

R301

R302

D2

1SV325F

D1

1SV325F

C4 0.022u

C39

10k

R30

Q6

LTC014EEBFS8

D10

DA2S101

CURRENT
STEERING

1k

1k

1k

D3

RF SWITCH

L2

10u

180n

C8

R6

R5 1k

R2 2.7k

0.68u 20

R31

10k

R32

10k

DC SW

DA2S101

D/A CONVERTER

24

1

VIN2

2

VDD

3

LD

4

CLK

5

DI

6

VIN3

7

C304

0.047u

R308

1k

0.1u

C302

D4

MODULATOR

C5

39p

L4

27n

C6

L3

0.022u

D4

L5

22n

D3

1000p

HSC277

Q1

LTC014EEBFS8

SHIFT

100k

C9

PLL SYSTEM

MB15E03SL-E1

9 CLoCK

10 DATA

11 LE

12 PS

13 ZC

14 LD/FoUT

15 P

16 R

R36

R37

R38

10k

10k

10k

R34

R35

R33

19

20

21

23

VIN822VIN1

VIN7

VoUT7

VoUT8

VoUT1

VoUT2

R2A20178NP2

IC300

GND

RESET

VDAREF2

VDAREF1

VoUT38VoUT49VIN410VIN511VoUT512VoUT6

5.6k

R309

CURRENT
STEERING

KDR731

39k

C307

R310

0.22u
D300

D5

C7

HVC350B

R8

R7

1u

IC1

XFIN

GND

VCC

oSCoUT

oSCIN

10k

10k

10k

VIN6

FREQUENCY
CONTROL

0.5p

R18

10k

R9

100k

100k

C11

1000p

8

FIN

7

6

5

Do

4

3

VP

2

1

CLK

DATA

C305

1u

5MS

18

17

16

15

14

13

C301

C306

1u

L6

10u

0

Q1

TX/RX SW

R39

C41

PLLEN

0.1u

MCH3914(7)-H

C10

D5

6.3

C12

1u

10

C42

1000p

0.01u

R307

VCO

8p

C15

C17

HVC350B

C13

5MS

C46

1000p

C43

0.01u

T0

C44

1000p

1M

Q3

10p

C19

L8

10u

9p

R12

220

Q2

2SC5383-T111

C18

1000p

C16

22u 10

4.98V

56

R40

2SC5383-T111

C45

22p

TCXO

X1

19.2MHz

VCoNT

GND

oUTPUT

L77-3074-05

+B

5C

LSDI
POWC

BPF

C316

R319

C318

1k

R388

0.18u

0.70V

C22

0.5p

RF BUFFER

4.15V

R11

DA2S101

R15 47k

2SC5108(Y)F

R14

C23

1000p

4.7k

C21

Q4

1k

1000p

C25

R22

C33

3.3k

1000p

R23

C34

15p

82n

L11

10

1.80V

C27

47p

L9

120n

C28

9p

L10

1000p

27n

15p

15p

C29

C26

C31

RF AMP

Q5

R19

5.6k
2SC5636

12p

3.3k

C32

R20

R21

330

1000p

5C

5.0V

R10

22

0.01u

C20

1000p

D6

SPEED UP

THERM
CURRENTCURRENT

VDCSW

1000p

RIPPLE FILTER

D6

5MS

VOLTAGE
REGULATOR/3V

Q7

2.90V

VCC

C47

C48

R43

4p

10

0.01u

L13

4.7n

R45

R46

C49

33k

100k

1000p

C50

5p

R389

R311

C51

22p

47k

R312

15k

R313

47k

47k

C308

0.1u

LSD BUFFER

IC301

NJM12904RB1

1

2

-

3

4

GND

C310

0.1u

8

V+

7

R315

6

++-

5

R314

C311

820k

560k

0.027u

C312

4700p

5MS

R:4.89V

1k

T: 1.59V

R323

0.18u

180

C317

0.1u

5MS

8V+

7BoUT

6B-IN

5B+IN

R320

56k

AF FILTER

IC302

NJM12904RB1

AoUT

A-IN

A+IN

GND

R369

0

Q300

LTA023JEBFS8

R385

C321

R:1.80V
T:1.81V

C320

0.18u

0.18u

C322

R325

C324

0.18u

1k

R322

1

3.3k

2

82k

R386

C319

3

0.18u

4

33k

R387

R321

2.2k

0.39u

470

C325

QT/DQT FILTER

NJM12904RB1

8V+

0.1u

7

6

5

R326

5.6k

IC303

-++

-

GND

1

C326

2

3

4

5VC

DC SW

MIC AMP/LIMITER

C335

270p

IC304

NJM12904RB1

1

C334

R339

1k

R335

10k

R336

C332

10k

1u

0.027u

R338

R337

10k

10k

C333

8200p

5R

W/N

RSSI RSSI

C336

820p

4

GND

-

C337

C338

8

V+

+

+

-
5

0.01u

1000p

R340

R342

560k

C339

10p

0

1k

R341

SQL SQL

R316

R317

LSDI

R328

10k

R329

330k

180p

R327

100k

HSC277

R24

D7,8

TX/RX SW

10k

C313

R318

3.9k

C314

5R

C327

D8

HSC277

D7

3.3k

0.1u

2.7k

0.01u

C328

4700p

R:1.03V
T:1.74V

RXLO

10k

R25

R:4.88V
T: 1.59V

5R

THERM THERM

VDCSW

TCXO OUT

+B

POWC

0.01u

100k

R330

2.2u

C329

5R

W/N

5T5T

RXLO

CURRENTCURRENT

VDCSW

TCXO OUT

+B

POWC

BPFBPF

5R

W/N

RSSI

5T

SQL

L110

C136

1000p

D101,102,103,104

ANT SW

270

L112

9T

22p

C144

R: 0V
T:4.93V

C156

330

0.39

R127

R125

68n18n

C265

47p

C266

3p

5p

C231

CN202

1k

R228

22p

C237

330

R227

C137

D105

1000p

C232

L205

MIXER

C239

L109

9T

C138

6p

12p

RN142S

C159

0.39

R129

C160

100p

120n

R:2.68V
T: 0.89V

Q203
3SK318

1000p

D103

2.2u

C139

R: 0V
T:0.81V

R119

0.39

1000p

C233

R229

C240

9T

C140

6p

27p

0

RN142S

1000p

82k

1000p

R230

C141

D104

R246

R:2.44V
T: 0V

82k

12p

C146

RN142S

100k

C244

1000p

82k

R231

ANT

CN2

18p

1000p

L215

2.7n

1M

1000p

6p

C135

L108

C157

1000p

Q104

C155

1000p

VDC SW

C261

D203

BPF TUNING

C229

R226

820n

L206

47

R225

0.01u

D101

HVC131

D102

HVC131

2.2u

R126

39p

HVC350B

L204

C230

5p

0

270

22n

10p

R247

C235

R128

R124

L213

L214

3.3k

1000p

FINAL

Q103

68k

1000p

R114

R115

47

Hi:1.48V
Mid:1.27V
Lo:1.21V

56k

R102

RD07MUS2BT112

R116

0

Temp compensation

C153

C115

1000p

R103

2.2k

Q101
2SC4926YD

PRI DRIVE

R:0V

1k

T:0.61V

C104

1000p

R: 0V
T:4.91V

1000p

R104

100k

-t

B57331V2104J

TH101

18

R121

R105

C105

39k

330

1000p

C161

C151

L103

R107

C147

100n

R: 0V
T:4.32V

18

1u

DRIVE
Q102

RFM01U7P

10

Hi:1.49V

R108

Mid:1.28V
Lo:1.21V

0.1u

1000p

100k

R109

R111 82k

C110

C109

Hi:3.25V
Mid:2.78V
Lo:2.63V

C101

22p

R26

4.7k

5T

C36

1000p

L101

R112

C112

68n

47

0.01u

C102

1000p

L105

F101

C113

56p

82n

0.5A 32V

R113

C150

R: 0V
T:1.09V

R101

18

0.01u

2.2u

C162

C152

C148

1000p

1000p

C106

1000p

L106

R130

L113

3T

9T

0

C107

1000p

9p

7.5V

R236

82

1.5k

1000p

R:4.68V
T: 1.53V

L201

R212

C253

560n

100

L202

R213

1000p

C219

C220

820n

C221

47

Q204

3SK318

470

R237

DOUBLER

R214

330k

22p

1000p

0.01u

R240

Q201

KTC4080E-P

R:0.72V
T: 0.71V

R216

180k

Q202

KTC4080E-P

0

R215

IF AMP

RXLO

C323

R324

560

3300p

R200

R232

0

47

C200

L217

5R

82n

R201

10u

C202

C270

C201

1.5k

0.01u

C273

C272

3p

1p

C271

39p

1p

D204

R251

HVC350B

C206

270p

1000p

C207

270p

68k

R203

270p

C203

R204

R205 2.2k

C204

L79-1474-05

1800p

CD200

0.1u

C205

Q200

LTA023JEBFS8

W/N

W:0V
N:5.01V

1M

R252

IC200

TA31136FMG

3.3k

4.7k

2p

82n

L209

C245

D200,201,204

BPF TUNING

C208

330k

R206

8

FILIN

AFoUT

9

C209

R207

W/N SW

C246

D200

0.1u

C211

FILoUT

QUAD

47p

2.7k

RSSI

C248

39p

1M

HVC350B

R233

L72-1042-05
CF200

0.1u

IFIN

DEC

RSSI

IFoUT

C212

1p

1M

R234

C247

450kHz

C213

VCC

NOISEDET

0.033u

R208

SQL

C249

D201

1000p

R253

4.7k

0.1u

MIXoUT

OSCoUT

GND

NOISEREC

C214

18k

R210

68k

39p

L211

2p

C250

R235

HVC350B

C254

C215

0.01u

C216

1

FM IF

OSCIN

SYSTEM

MIXIN

R249

16

1k

0.1u

TH200

NCP18WM474J0S

-t

R:4.88V
T: 1.59V

22p

82n

47

1000p

L200

R248

C251

C218

5p

560n

C217

0.01u

C125

RF AMP

100k

R:4.88V
T: 1.59V

BPF

TCXO OUT

R238

C223

0.01u

39p

R:0.61V
T: 0.59V

R218

1k

C127

C108

100k

L114

47p

L104

33n

15p

POWC

R:3.85V
T: 1.26V

R239

R220

680

5T

C129

CURRENT

390k

C255

L71-0669-05

1st IF(38.85MHz)

XF200

L115

6T

15p

R120

1.8k

VDCSW

R:4.98V
T: 0V

1000p

C226

R241

C133

R:3.11V
T: 1.03V

180k

R221

C227

8p

5R

L107

330

C134

6T

1000p

27p

C154

LTC014EEBFS8

C256

47p

R243

C259

C228

0.01u

6p

C234

TX-RX UNIT (X57-821x-xx )

D426
B30-1782-05

BUSY

(GRN)

D427
B30-1779-05

TX

(RED)

B38-0939-05

LCD

D414,D415 B30-2261-05
D416~D425 B30-2337-05

LCD/KEY BACKLIGHT

KEY MATRIX

PTT

MONI

S419

W02-3766-05

ENC

BATT+

7.5V

BATT-

VR300

R31-0684-05

VOL/PSW

S418

S417

F300

3.15A

SB

5MS

DCSW

Q403

LTC014EEBFS8

LEDG

5MS

DCSW

Q404

LTC014EEBFS8

LEDR

COM0~COM3,SEG0~SEG31

Q401

12A02CH

2SC4617(R)

DCSW DCSW

SB

D404~D407

1SS388
D408~D411
MA2S111-F

DIODE
MATRIX

INPTT

MON

ENC1

ENC2

+B

PROTECT

D301
GN1G

D302
RB521S-30

PROTECT

VOLIN

VOLOUT

Q6

LTC014EEBFS8

PLLD

INVERT

2SC5383-T111

Q402

LAMP

LEDG
LEDR

PLLE
DAT
CLK

KEYI1~KEYI4,KEYIS,KEYIT

KEYO1~KEYO4

BATT
RESET
EXPTT
INPTT

BATT

5M

IC306

XC6209B502P-G

AVR

5V

RESET

IC305

XC6120N302N-G

Q7

SB

MB15A02PFV2E1
PLPS
PLLE

DAT
CLK

LD

3.3V
REG

5C

L77-1944-05

LSDO

IC300(6/8)
R2A20178NP

FREQ

5MSC
5TC
5RC
5CC

PLLD
ENC1
ENC2
MON

D304
RB521S-30

PROTECT

Q304

SSM3J05FU-F

DC SW

5MSC

RESET

IC1

PLL SYSTEM

TCXO

19.2MHz

X1

5C

D/A

CONV.

5MS

XOUT

X400

L78-2974-05

11.0592MHz

5MS

LOOP

FILTER

ASSIST

MCU

IC401

R5F2L3ACCKEKA

XIN

BSFT

SW

Q400
2SC4919-S

IC308

XC6209B502P-G

AVR

5V

5CC

LPF

D4

HVC350B

MOD

5MS

D/A

CONV.

D5

IC300(5/8)

R2A20178NP

HVC350B

VCO oscillation frequency
RX: 174.850~212.845MHz(K,M,E)

TX: 136.000~173.995MHz (M)

144.000~147.995MHz (K)

144.000~145.995MHz (E)

5M

CLK
DATA
E2PIN
E2PCS

EEPROM

IC400

BR255640FV1-W

Q308

DC SW

5TC

Q307

LTA023JEBFS8

DC SW

5RC

Q3

MCH3914(7)-H
D1,D2
1SV325F

VCO

SHIFT

SW

SHIFT

THREM
CURRENT
RSSI
SQL
VOX
LSDI

VDCSW
WIID/NAR
HSDO

SPM

5M

5C

SSM3J05FU-F

5T

5R

Q1
LTC014EEBFS8

D3
HSC277

Q4

2SC5108(Y)F

BUFF
AMP

RIPPLE

FILTER

5C

19.2MHz

WID/NAR

LSDI

VOLIN

2SC5636

Q2

2SC5383-T111
D6
DA2S101

Q201

KTC4080E-P

DOUBLER

5R

SQL

RSSI

L79-1474-05

LTA023JEBFS8

QT/DQT
FILTER

FILTER

CONV.

IC300(2/8)

R2A20178NP

Q5

RF

AMP

5C

DC SW

Q200

AF

D/A

2nd Local

AFO

CD200

D7,D8
HSC277

5T

38.4MHz

IF SYSTEM

CD

IC303
NJM12904RB1

5MS

IC302

NJM12904RB1

5MS

2SC4926YD

TX/RX

SW

5R

VDCSW

1st Local frequency

174.850~212.845MHz(K,M,E)

IC200
TA31136FMG

5R

CF200

L72-1042-05

450kHz

IC300(3/8)
R2A20178NP

MOD

VOX

Q101

PRE

DRIVE

5T

VDC SW

Q104

LTC014EEBFS8

Q202

KTC4080E-P

IF

AMP

5R

VOLOUT

SB

0.315A

D/A

CONV.

VOX DET

D300
KDR731

HSDO

F301

Q102

RFM01U7P

DRIVE

AMP

MCF

38.85MHz

XF200

L71-0669-05

IC307

TA7368FG

AF POWER AMP

DC SW

IC304

NJM12904RB1

MIC AMP
LIMITER

DC SW

5MS

RD07MUS2BT112

F101

0.5A

IC300(8/8)
R2A20178NP

POWC

CONV.

5MS

Q203
3SK318

MIXER

5R

Q306

SSM6J08FU(F)

HSDO

5VC

Q300

LTA023JEBFS8

Q103

FINAL

AMP

CURRENT

D/A

BPF

RF BPF

TUNE

D200,D201,D204

HVC350B

BPF

2SK3577-A

Q301

LTC044EEBFS8

DC SW

SPM

IC301

NJM12904RB1

V REF/

MIC AMP

5C

RX: 136.000~173.995MHz (K,M,E)
TX: 136.000~173.995MHz (M)

144.000~147.995MHz (K)

144.000~145.995MHz (E)

D103-D105
RN1425
D101,D102
HVC131

ANT SW

+B

Q204

3SK318

RF

AMP

5R

IC300(7/8)

D/A

R2A20178NP

CONV.

5MS

Q305

MUTE

SW

Q303

2SK3577-A

MUTE

MUTE

SW

SW

DC SW

IC300(1/8)
R2A20178NP

D/A

CONV.

5T

THREM

BPF

D203

RF BPF

HVC350B

TUNE

Q302

LTC044EEBFS8

-t

TH101

EXPTT

5MS

ANT

J301

E11-0717-05

CN300

J300

E11-0484-05

MIC300

T91-0673-05

MIC

SPG
TXD
SPK
AFO

PTT/RXD
MIC
IM

5MS

EXT
SP

INT
SP

EXT
MIC

INT
MIC