Sony ICFM-770-LS Service manual

ICF-M770L/M770S/M770SL

SERVICE MANUAL

Ver 1.1 2002.06

Photo: ICF-M770SL

SPECIFICATIONS

Time display: 24-hour system
Frequency range:

Band ICF-M770L ICF-M770S ICF-M770SL Channel

FM 87.5 – 87.5 – 87.5 – 0.05 MHz

108 MHz 108 MHz 108 MHz

SW — 5 800 – 5 800 – 5 kHz

MW 531 – 531 – — 9 kHz

1 602 kHz 1 602 kHz

LW 153 – — 153 – 9 kHz

279 kHz 279 kHz

Speaker: 12 cm (43⁄4 inches), 8 Ω
Power output: 350 mW (at 10% harmonic

distortion)

Output: v (earphone) jack (ø 3.5 mm minijack)
Power requirements:

220–230 V AC, 50Hz
6 V DC, four R20 (size D) batteries

Dimensions:

Approx. 277 × 156 × 71.5 mm (w/h/d)
(Approx. 11 × 6
parts and controls

Mass: Approx. 1 540 g (3lb 6
Supplied accessories: AC power cord (1)

Design and specifications are subject to change
without notice.

15 900 kHz 15 900 kHz

1

⁄4 × 27⁄8 inches) incl. projecting

) incl. batteries

oz

AEP Model

ICF-M770L/M770SL

UK Model

ICF-M770L

Italian Model

East European Model

ICF-M770S

step

9-873-657-02 Sony Corporation

2002F0500-1 Personal Audio Company
C 2002.06 Published by Sony Engineering Corporation

ICF-M770L

FM/MW/LW PLL SYNTHESIZED

ICF-M770S

FM/SW/MW PLL SYNTHESIZED

ICF-M770SL

FM/SW/LW PLL SYNTHESIZED

ICF-M770L/M770S/M770SL

SECTION 1

SERVICING NOTE

TABLE OF CONTENTS

1. SERVICING NOTE................................................. 2

2. GENERAL .................................................................. 3

3. DISASSEMBLY

3-1. Disassembly Flow ........................................................... 4

3-2. Cabinet Rear Assy........................................................... 4

3-3. Chassis Assy.................................................................... 5

3-4. MAIN Board ................................................................... 5

4. ELECTRICAL ADJUSTMENTS........................ 6

5. DIAGRAMS

5-1. Block Diagram ............................................................... 8

5-2. Note for Printed Wiring Boards and

Schematic Diagrams ....................................................... 9

5-3. Printed Wiring Boards

– MAIN/JACK/POWER/INLET Boards –.................... 10

5-4. Schematic Diagram

– MAIN/JACK/POWER/INLET Boards –.................... 11

5-5. Printed Wiring Board – KEY Board –.......................... 12

5-6. Schematic Diagram – KEY Board – ............................ 13

5-7. IC Pin Function Description .......................................... 14

6. EXPLODED VIEWS

6-1. Cabinet (Front) Section................................................... 15

6-2. Cabinet (Rear) Section .................................................... 16

6-3. Chassis Section ............................................................... 17

HOW TO CHANGED THE CERAMIC FILTERS

This model is used two ceramic filters of CF2 and CF3.
You must use same type of color marked ceramic filters in order to
meet same specifications.
Therefore, the ceramic filter must be changed two pieces together
since it’s supply two pieces in one package as a spare parts.

Mark Center frequency

CF2

mark

CF3

red 10.70 MHz

blue 10.67 MHz

orange 10.73 MHz

black 10.64 MHz

white 10.76 MHz

7. ELECTRICAL PARTS LIST .............................. 18

Notes on chip component replacement

•Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED
LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANU AL OR IN SUPPLEMENTS PUB­LISHED BY SONY.

2

SECTION 2

GENERAL

ICF-M770L/M770S/M770SL

This section is extracted from
instruction manual.

Rear

A

Arrière
Rückseite
Parte posterior
Achterkant

B

To a wall outlet
Vers une prise murale
An eine Netzsteckdose
A la toma de pared
Naar een stopcontact

To AC IN
Vers AC IN
An AC IN
A AC IN
Naar AC IN

R20 (size D) × 4
R20 (D) × 4
R20 (Größe D) × 4
R20 (tamaño D) × 4
R20 (D) × 4

Insert E side of the battery first.
Insérez la borne E de la pile en premier.
Legen Sie die Batterien mit dem Minuspol
E zuerst ein.
Inserte primero el lado E de la pila.
Breng de E kant van de batterij eerst in.

AC power cord
Cordon d’alimentation secteur
Netzkabel
Cable de alimentación de CA
Netsnoer

Setting the Clock

“0:00” will flash in the display when the batteries
are installed or the AC power cord is plugged in
for the first time.
The clock can be adjusted only when the radio is
turned off.

1

Press mb/CLOCK (CLOCK for ICF­M770L) for more than 2 seconds.

The “hour” starts flashing.

2

Turn TUNE/TIME SET to set the hour for
the current time, then press mb/CLOCK
(CLOCK for ICF-M770L).

The “minute” starts flashing.

3

Turn TUNE/TIME SET to set the minute
for the current time, then press mb/
CLOCK (CLOCK for ICF-M770L).

The clock starts operating, and “:” starts flashing.

To set the current time exactly to the second, adjust
the minute and then press mb/CLOCK (CLOCK for
ICF-M770L) to synchronize with a time signal (such
as the telephone time signal).

How to Adjust the Time Digits

When you turn TUNE/TIME SET to or , the
time digits move forward or backward by one step,
and when you turn it to
move rapidly.

Notes

• If you do not operate mb/CLOCK (CLOCK for ICF-
M770L) or TUNE/TIME SET within 65 seconds,
the clock setting mode will be cancelled.

•24-hour system : “0:00” = midnight, “12:00” = noon

Using the Backlight Function

Press LIGHT to turn on the backlight.
To turn off the backlight, press LIGHT again.

When operating the unit on batteries

The backlight will turn off automatically after 30
seconds to save the batteries. However, if you
operate the radio while the backlight is lit, it will
stay on for another 30 seconds.
To turn off the backlight before the time has
elapsed, press LIGHT.

or , the time digits

HOLD OPERATION

LIGHT

STANDBY

mb/CLOCK TIME SET ON/OFF SLEEP

CLOCK for ICF-M770L
CLOCK pour ICF-M770L
CLOCK beim ICF-M770L
CLOCK para ICF-M770L
CLOCK voor ICF-M770L

v jack
Prise v
Buchse v
Toma v
v aansluiting

C

FM SW MW/LW

SCAN

TONE

TUNE/

TIME
SET

VOL

*The PRESET TUNING 4 button has a

tactile dot.

* La touche PRESET TUNING 4 a un point

tactile.

*Auf der PRESET TUNING-Taste 4

befindet sich ein fühlbarer Punkt.

*La tecla PRESET TUNING 4 tiene un

punto táctil.

*De PRESET TUNING 4 toets is voorzien

van een voelstip.

PRESET TUNING

STATION SELECT/ PRESET

BAND

1234567

*

Telescopic Antenna
Antenne télescopique
Teleskopantenne
Antena telescópica
Telescoopantenne

TUNE/TIME SET
VOL

TONE

3

ICF-M770L/M770S/M770SL

)

• This set can be disassembled in the order shown below.

3-1. DISASSEMBLY FLOW

SET

3-2. CABINET (REAR) ASSY

(page 4)

3-3. CHASSIS ASSY

(page 5)

3-4. MAIN BOARD

(page 5)

SECTION 3

DISASSEMBLY

Note: Follow the disassembly procedure in the numerical order given.

3-2. CABINET (REAR) ASSY

main board

5

Remove five solders.

4

3

telescopic antenna (ANT1)

2

screw (P3 × 10)

6

1

six screws
(BTP3

cabinet (rear) assy

×

14

main board

4

3-3. CHASSIS ASSY

)

ICF-M770L/M770S/M770SL

4

chassis assy

1

knob (jog)

3-4. MAIN BOARD

3

key board

4

3

knob (control) (tone)

claw

2

knob (control) (vol

5

main board

1

two screws
(P2

4

three claws

×

8)

2

claw

5

ICF-M770L/M770S/M770SL

SECTION 4

ELECTRICAL ADJUSTMENTS

0 dB=1 µV

[MW/LW]

Setting:

BAND switch: MW or LW

AM RF signal

generator

30% amplitude
modulation by
400 Hz signal
Output level: as low as possible

[FM]

Setting:

BAND switch: FM

FM RF signal

generator

22.5 kHz frequency
deviation by 400 Hz
signal
Output level: as low as possible

[SW] (ICF-M770S/M770SL)

Setting:

BAND switch: SW

AM RF signal

generator

30% amplitude
modulation by
400 Hz signal
Output level: as low as possible

Put the lead-wire
antenna close to
the set.

MAIN board

0.01 µF

11 pF

TP (ANT)

MAIN board
TP (ANT)

set

set

set

level meter

32 Ω

JACK board
v jack (J201)

level meter

32 Ω

JACK board
v jack (J201)

level meter

32 Ω

JACK board
v jack (J201)

no mark: common
(): ICF-M770L
[]: ICF-M770S
〈〈 〉〉 : ICF-M770SL

AM IF ADJUSTMENT

Adjust for a maximum reading on level meter

T1 450 kHz

MW VT VOLTAGE ADJUSTMENT

+
–

+
–

+
–

Adjustment Part Frequency Display Reading on Dig ital Voltmeter

(L8) [L10] 531 kHz 2.5 ± 0.1 V [2.8 ± 0.1 V]

Confirmation 1,602 kHz 9.6 ± 1.0 V

MW TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter

(L5-1) [L5] 603 kHz

(CT1) [CT2] 1,404 kHz

LW VT VOLTA GE ADJUSTMENT

Adjustment Part Frequency Display Reading on Dig ital Voltmeter

(CT3) 〈〈L10〉〉 153 kHz 2.2 ± 0.1 V 〈〈2.8 ± 0.1 V〉〉

Confirmation 279 kHz 8.6 ± 1.0 V

LW TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter

(L5-2) 〈〈L5〉〉 162 kHz

CT2 243 kHz

FM VT VOLTAGE ADJUSTMENT

Adjustment Part Frequency Display Reading on Dig ital Voltmeter

L14 87.5 MHz 2.9 ± 1.0 V

Confirmation 108 MHz 9.1 ± 1.0 V

FM TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter

L12, 13 87.5 MHz

CT4 108 MHz

digital voltmeter

MAIN board

TP (VT)

100 kΩ

+
–

•Repeat the procedures in each adjustment several times, and the
tracking adjustments should be finally done by the trimmer ca­pacitors.

• Remove FM/SW antenna in FM/SW adjustment.

6

SW VT VOLTAGE ADJUSTMENT*

Adjustment Part Frequency Display Reading on Dig ital Voltmeter

L8 5,800 kHz 2.7 ± 0.1 V

Confirmation 15,900 kHz 9.1 ± 1.0 V

SW TRACKING ADJUSTMENT*

Adjust for a maximum reading on level meter

L3 5,800 kHz

CT1 15,900 kHz

*: ICF-M770S/M770SL

Adjustment Location: MAIN board (See page 7)

Adjustment Location:

– MAIN BOARD (Component Side) –

MW VT Voltage Adjustment (M770S)

L10

LW VT Voltage Adjustment (M770SL)

CT3

LW VT V oltage

Adjustment (M770L)

CT1

SW Tracking Adjustment (M770S/M770SL)

L3

MW VT Voltage Adjustment (M770L)

L8

SW VT Voltage Adjustment (M770S/M770SL)

L14

FM VT Voltage

Adjustment

ICF-M770L/M770S/M770SL

CT2 MW Tracking Adjustment (M770S)
L5 LW Tracking Adjustment (M770SL)

– MAIN BOARD (Conductor Side) –

TP

(VT)

T1

AM IF

Adjustment

L13
L12 FM T racking Adjustment
CT4

CT1

MW Tracking Adjustment (M770L)

L5-1

TP

(ANT)

CT2

LW Tracking Adjustment (M770L)

L5-2

77

ICF-M770L/M770S/M770SL

5-1. BLOCK DIAGRAM

ANT1

FM/SW

ANTENNA

SECTION 5

DIAGRAMS

CT4, L12, 13

FM TRACKING

(M770L)

FERRITE-ROD

FERRITE-ROD

M770S/

M770SL

(M770L)

(M770S)

FERRITE-ROD

CT1, L5-1

MW TRACKING

CT2, L5

MW TRACKING

FM/(SW/MW/LW) BAND

SELECT SWITCH

25 24

M770S/

M770SL

L5-1
MW

ANTENNA

L5-2

LW

ANTENNA

L5

MW/LW

ANTENNA

Q5

3

XIN

X101

75kHz

L3

SW

RF

CT1, L3

LW TRACKING

(M770L)

CT2, L5-2

LW TRACKING

(M770SL)

LW TRACKING

BPF

XOUT

REG

+1.2V

REG

+1.2V

CT2, L5

SW

SWITCH

Q1

Q2

SW

SWITCH

VCC B+

Q6

REG

+1.2V

VCC B+

M770S/
M770SL

MW/LW

SWITCH

D2-1

CT2

SW BAND

SELECT SWITCH

Q3

M770S/

M770SL

4

LCD0 – LCD1221COM0 – COM3

35 – 47

LIQUID CRYSTAL DISPLAY

LCD101

B.P.F.

BPF1

CT1

(MW/LW)/SW

31 – 34

D1-1

L12, 13

FM RF

(M770L)

LOW-PASS FILTER

Q104, 110

19

EO

D6

(M770L)

CT4

FM
RF IN

13

AM
RF IN

11

(M770L)

L8

SW/MW

OSC

CT3

CT3

LW VT

VOLTAGE

IC104

MW/LW

SWITCH

D2-2

SWITCH

Q7

MW/LW
SWITCH

Q4

L10

MW/LW

OSC

SYSTEM CONTROLLER,

LIQUID CRYSTAL DISPLAY DRIVER,

KEY CONTROL

KS0 – KS4

1, 6 – 9

KEY MATRIX

S101 – 119

10

FM
RF

FM

FRONT-END

AM

FRONT-END

AM OSC

6 8

M770S/
M770SL

D1-2

SW

Q4

M770S/
M770SL

M770S/

M770SL

KR0 – KR3

10 – 13

• SIGNAL PATH

FM/AM FRONT-END,

FM/AM IF AMP, DET, AGC, AF AMP

CF3

T1

AM IF

D7

L10

MW VT

CF2

10.7MHz

T1

AM IFT

L14

L14

FM OSC

(M770L)

L8

MW VT

VOLTAGE

FM/(SW/MW/LW) BAND

SELECT SWITCH

(M770SL)

VOLTAGE

+3V B+

HOLD

10.7MHz

450kHz

L10

LW VT

S120

HOLD

OFF

10.7MHz

CF1

(M770S/M770SL)

Q108

CF4

3

17

FM/(SW/MW/LW) BAND

SELECT SWITCH

L8

SW VT

VOLTAGE

(LCD BACK LIGHT)

FM
IF IN

FM
DISCRI

DISCRIMINATOR

AM
IF IN

AM IF AMP,

AGC, DET

FM/AM

BAND

SELECT

LED DRIVE

D104, 105

TUNING METER

16 4 5

Q10

56

AM/(FM/TV)

LIGHT

16

Q107

FM/AM

IF OUT

15 18

+

FM OSC

FM VT VOLTAGE

FM VCO
BUFFER

Q8

(M770S)

VOLTAGE

FM VCO
BUFFER

Q105

20

VCOL

VCOH

HOLD

17

FM

IF AMP

FM

20

METER

IC1

DET
OUT

24

+

RV2

TONE

Q11, 12

TONE

CONTROL

SWITCH

REG OUT

9

REG +1.2V

D9

14

52

BEEP

TUNED

2

MUTE

AC DET

VDET1
CEDET

VDET2

POWER

15

50
51

53

5

LOW-PASS

FILTER

CIRCUIT

B+

AC DETECT

VOLTAGE DETECT

VOLTAGE DETECT

Q106, 111, T101

D102

POWER ON/OFF

CONTROL SWITCH

Q103

BATTERY

IC102

BATTERY

IC103

VCC B+

DC/DC

CONVERTER

Q102

AF
IN

25

AC DETECT

Q201

B+ SWITCH

Q101

B+ SWITCH

Q109

AF

POWER AMP

NF

VOL

+3V B+

MUTING
SWITCH

Q9

RECT

D205, 206

AF

OUT

28

+3V

REGULATOR

IC101

RV1
VOL

D201

: FM

: MW/LW

T202

POWER

TRANSFORMER

D202 – 204

J201

v

SP1

J301

AC IN -

DRY BATTERY

SIZE "D"

(IEC DESIGNATION R20)

4PCS. 6V

88

ICF-M770L/M770S/M770SL

d

5-2. NOTE FOR PRINTED WIRING BOARD AND SCHEMATIC DIAGRAMS

Note on Printed Wiring Board:

• X : parts extracted from the component side.

• Y : parts extracted from the conductor side.

• W : indicates side identified with part number.

f

•

: internal component.

• : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)

Note on Schematic Diagram:

• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.

• All resistors are in Ω and 1/
specified.

f

•

: internal component.

• C : panel designation.

Note: The components identified by mark 0 or dotted line

with mark 0 are critical for safety.
Replace only with part number specified.

• A : B+ Line.

• H : adjustment for repair.

•Power voltage is dc 6 V and fed with regulated dc power
supply from battery terminal.

•Voltages and waveforms are dc with respect to ground in
no-signal (detuned) conditions.
no mark : FM
(): SW
[]: MW
〈〈 〉〉 : LW

•Voltages are taken with a V OM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc­tion tolerances.

•Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc­tion tolerances.

• Circled numbers refer to waveforms.

• Signal path.

F : FM
f : MW/LW

4

W or less unless otherwise

• Circuit Boards Location

jack board

main boar

power board

inlet board

key board

• IC Block Diagram

IC1 CXA1019S

GND

GND

AF OUT

VCC

RIPPLE

FILTER

AF IN

DET OUT

AFC AGC

AFC AGC

FM FE

FM OSC

10

REG OUT

IF GND

TUNING

METER

FM RF

23 22 21 202425 19 18 17 1629 28 27 2630

AM IF DET AGC

AF POWER AMP AM FE FM IF

FM

DISCRIMINATOR

2 3

1

GND

GND

5 6 7 8 9

4

NF

VOL

FM DISCRI

AFC

AM OSC

METER

11

AM RF IN

N.C

FE GND

FM IF IN

AM IF IN

N.C

FM RF IN

FM/AM BAND

SELECT

15141312

IF OUT

FM/AM

99

ICF-M770L/M770S/M770SL

5-3. PRINTED WIRING BOARDS – MAIN/JACK/POWER/INLET Boards – • See page 9 for Circuit Boards Location.

1 2 3 4 5 6 7 8 9 10

L5

(M770S/M770SL)

MW/LW FERRITE-ROD

ANTENNA

A

L5-1

MW FERRITE-ROD

ANTENNA

MAIN BOARD

B

JW13

(M770L)

JC5

Q3

JW14

R9

ECB

JW15

C6

C

C11

CT2

C18

Q7

R8

M770S/

M770SL

ECB

C67

L11

M770S/
M770SL

(M770L)

Q6

R13

JC10

C40

C23

(M770L)

D

M770S/

M770SL

L10

1A

K

2A

R14

D2

C19

C21

C22

(M770SL)

C59

E

M770S/
M770SL

C30

RV1

VOL

F

R24

C44

JW11

R16

R23

Q9

R25

BCE

JW10

115

R6

JC3

ECB

M770S/
M770SL

C10

(M770S/M770SL)

JC14

C13

JW20

(M770L)

R12

L9

Q4

ECB

JC4

JC11

G

JW8

C62

C64

R10

Q1

GDS

L2

JW9

R2

JW17

JW12

JW18

C73

R11

C2

JW7

C4

R1

JW16

L3

R34

C7

CT1

C12

C20

JC13

1A

K

2A

D1

C15

C14C16

(M770L)

L8

JC8JC1

CT3

C17

(M770L)

JW22

C56

C5

JC2

LW FERRITE-ROD

ANTENNA

(M770S/M770SL)

L15

Q2

BCE

L7

R20

R15

JW21

R31

L5-2

(M770L)

(M770L)

CT4

R17

JC6

C25

JW4

KA

R18

D7

C61

ECB

Q8

C1

AK

D8

L12

L13

D6

JW5

C27

KA

R21

C37

L16

1

R5

2

3

BPF1

R19

C28

L14

C29

+

C35

R28

R29

15

C34

C32

C58

CF2

IC1

CF3

16

C38

C43

JW3

T1

CF1

C57

C42

+

C52

+

1

CF4

C51

30

C48

Q10

ECB

D5

A

K

D9

K

Q12

ECB

Q11

C41

C45

ECB

+

C55

R33

A

K

R32

C54

JW1

+

1

+

JW2

L6

R30

5

R7

R3

ECB

Q5

C3

+

C8

+

C50

C33

JW19

JC15

C65

C36

JW6

L1

C24

TP

(VT)

R22

JC7

R27

1-684-571-

C66

INLET BOARD

J301

~

AC IN

ANT1

TP

(ANT)

K/A

C63

J201

v

11

(11)

11 12 13 14 15

JACK BOARD

1

D201

R202

D202

AK

AK

D203

AK

K

D204

A

Q201

C207

14

POWER BOARD

R201

R203

+

C203

TRANSFORMER

+

C204

D206

C206

13

13

T202

POWER

5

D205

C205

C202

SP1

11

1-684-568-

(11)

DRY BATTERY

SIZE "D"

(IEC DESIGNATION R20)

4PCS. 6V

+

KEY

A

H

BOARD

(Page 12)

RV2

TONE

C46

I

C47

I

• Semiconductor Location

Ref. No. Location Ref. No. Location

D1 E-3
D2 D-2
D5 C-10
D6 C-5
D7 D-5
D8 B-6
D9 C-9
D201 C-11
D202 C-11
D203 D-11
D204 D-11
D205 D-13
D206 D-13

Q1 B-3
Q2 C-4
Q3 C-2
Q4 F-3
Q5 B-4
Q6 D-2
Q7 E-2
Q8 D-5
Q9 G-2
Q10 B-9
Q11 D-9
Q12 C-9
Q201 D-12

11

14

1-684-567-

(11)

1-684-569-

11

(11)

IC1 D-7

1010

5-4. SCHEMATIC DIAGRAM – MAIN/JACK/POWER/INLET Boards – • See page 9 for IC Block Diagram.

JW14

R9

JW17

ANT1

FM/SW

ANTENNA

(M770S/M770SL)

C3

1000p

R3L1

10µH

4.7k

L2 R1 C4 R2 C5

22µH

CT2

∗

(M770S)

10p

50p (M770L/M770SL) (M770L)

C1

0.01

D5

D8

1SS356

1k

R5

(M770S/M770SL)

D2(1/2)

1PS226

(ANT)

TP

JW1

4.7k 5p 100 0.01

∗

100p

770SL)

CT2

C11

SVC347

770L/M

(M

JC6

770L)

BPF1

(M

OI

G

S

(M770L)

(M770S/M770SL)

C6
5p

Q1

2SK238

SW

SWITCH

33p

C23

FERRITE-ROD

ANTENNA

MW/LW

FERRITE-ROD

ANTENNA

(M770S/M770SL)

CT1
10p

L5-2

LW

L5-2

L5

L7

47µH

L15R10

220µH

1k

L3

SW RF

JC14

C12

C10
15p

47p

JC13

C73

L5-1

2p

(M770L)

L5-1

MW

TP

R17

100k

1000p

HVU202A

C25

5p

JC15

FERRITE-ROD

ANTENNA

(M770S/M770SL)

CT4
10p

C65

100p

FM

RF

L13

FM

RF

0.01

(M770S)

(M770SL)

(VT)

R20

1k

C24

D6

C61

0.01

JW4

JW5

Q2
DTA144TUA
SW SWITCH

DTC144TUA

R34
470

C50C7

0.010.01

100
10V

C33

22

10V

C34

SW BAND

SELECT SWITCH

JW12

JW18

C13

470p

L16 R7

47µH

C8

(M770S/M770SL)

R18

JW16 J W21

100k

C27

1000p

D7

HVU202A

100k

Q3

R6

4.7k

Q6

2SC4081

MW/LW

SWITCH

(M770L)

D1(1/2)

SVC347

(M770L)

R15

2.2k

10k

JW19 JC11

C28
10p

L14
FM

R19

3.3k
OSC

C29
2p

C32

0.22

(M770S) (M770SL) (M770L) (M770L)

R12

∗

(M770L)

3.3k

(M770S/M770SL)

10k

D1(2/2)

R12

SVC347

∗

R13

JW20

R21
22k

2SC4098

FM VCO

BUFFER

(M770L)

0.022

R8

10k

Q8

JW6 JW10JC7

100p

C58

1M

JC5

R14 C59

1M 10p

SVC347

D2(2/2)

R16 L11

47µH

22k

C19

∗

15p

(M770S)

(M770SL)

330p

C22

∗

68p

(M770S)

330p

(M770SL)

CF4

10.7MHz

220µH

R23 R24C44

1k 4.7k0.01

C36

0.1

C20

C18

0.01

JW13

(M770S/M770SL)

330

R22

47

R27

C35

4.7
25V

L9

C19

C21

C22

∗

∗

∗

∗

390p

(M770S)

100p

(M770SL)

RV1L12
50k

VOL

(M770L)

C14
68p

SW SWITCH

(M770SL)

C21

DTC144TUA

FM/(SW/MW/LW)BAND

SELECT SWITCH

JW11

∗

Q5

Q4

2SA1576A

MUTING

SWITCH

R11

1M

C15

∗

CT3 C2C17
50p 47p330p

(M770L)MW/LW SWITCH

(M770S/M770SL)

Q9

C16

∗

MW/LW OSC

2SA1576A

MW/LW

SWITCH

(M770S/M770SL)

JC8

Q4

∗

L10

Q7

JC10

JW15

C40

0.01

R25
47k

ICF-M770L/M770S/M770SL

L8

SW/MW OSC

JC1

770SL)

770S/M

(M

770L)

(M

JC3

JC4

770L)

(M

C62

C30

220

0.01
10V

C16

∗

(M770L)

15p

(M770S/M770SL)

5p

C15

∗

390p

(M770L)

6800p

(M770S/M770SL)

C63

100p

JC2

JW7JW8

C66

0.022

0.022

C67

2SC4098

2SC4555

R30

1k

Q4

∗

(M770L)

(M770S/M770SL)

14

15

13

12

11

4

3

1

2

5

6

UCOM DC

6V COM

VCC

GND

BEEP

LW=L MW=L SW=H

FM=H SW.MW.LW=L

BAND FM=L

SW.MW.LW=H

MUTE

SCAN TUNE

VT

D202 D203 D204

1SS355 1SS355 1SS355

D201

4

5

AC DETEC

3

UCOM DC

1

2

6V COM

4

5

3

1

SP

2

GND

1SS355

C207

0.022

C203

C202

220

100p

16V

Q201

2SC2001

DETECT

R201

100

C205

0.01

D205

1N4002

AC

D206

1N4002

C206

0.01

C204

R203

2200

2.2k

16V

BATT +

DRY BATTERY

1

3

2

4

R202

47

BATT DC

6V COM

AC DETEC

BATT -

1

3

2

4

T202

POWER

TRANSFORMER

3

3

2

2

1

1

J201

SP1

SIZE"D"

(IEC DESIGNATION R20)

4PCS. 6V

J301

~

AC IN

(Page 13)

JW22

10

AC DETEC

Q10

DTC144TUA

FM/(SW/MW/LW)

BAND SELECT

SWITCH

R31
100

FE

FM

NC

AM

FM

RF

FM

/AM

GND

FM

IF OUT

/AM

BAND

R28C37

2.2k100p

JW3

T1

AM IFT

FM

R29
330

0.01

CF1

450KHz

RF IN

IF IN

AM

SELECT

IF IN

FM

NC

C38

CF2

CF3

10.7MHz

10.7MHz

REG

OUT

RF IN

ETER

IF

M

GND

AFC

AGC

C41 C42

4.7

4.7

50V

50V

C57

0.01

AM

OSC

AFC

AGC

AFC

AF

OUT

DET

C45

0.22

C43

0.022

D9

DAN202U

NF

FM

VOL

OSC

RIPPLE

VCC

FILTER

IN

JW2

C55

0.022

C48

22

25V

R32

4.7k

AF

2SC4081

DISCRI

OUT

2.2

C47

C46

Q11

GND

GND

FM/AM FRONT-END

FM/AM IF AMP,DET,

AGC,AF AMP

GND

Q12

TONE CONTROL

Q11,12

SWITCH

R33
47k

CXA1019S

IC1

C54

1000

10V

RV2
10k

TONE

JW9

C64

100p

C51
470
16V

GND

C52

0.047

0.01

2SC4081

38µH

9

AM OSC

C56
47p

8

FM OSC

L6

7

RF GND

The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.

1111

ICF-M770L/M770S/M770SL

5-5. PRINTED WIRING BOARD – KEY Board – • See page 9 for Circuit Boards Location.

• Semiconductor
Location

Ref. No. Location

D101 I-4
D102 I-7
D103 I-6
D104 D-7
D105 D-7
D106 D-3

IC101 I-5
IC102 B-3
IC103 D-3
IC104 D-4

Q101 I-4
Q102 I-4
Q103 G-5
Q104 F-4
Q105 E-5
Q106 I-6
Q107 E-7
Q108 I-3
Q109 I-4
Q110 F-3
Q111 I-6

1 2 3 4 5 6 7 8

KEY BOARD

C116

S113

R116

R114

M770L/
M770S

C124

R129

R180

56

1

R130

R152

C118

JW121

S106

R166

5

JW104

JW135

LCD101

LIQUID CRYSTAL DISPLAY

R186

R185

R184

R183

R182

R181

42

43

IC104

15

14

R131

R133

R132

C130

R139

C117

Q104

BCE

15

JW122

STANDBY

Q101

BCE

Q102

R103

BCE

R142

JW123

TIME SETON/OFF

R143

JW124

D101

C106

R187

R188

JW134

R141

JW125

C152

Q109

BCE

R104

R105

AK

C105

4

R190

R189

29

28

R144

C128

C133

C132

BCE

C142

JW133

JW132

C150

R101

JW126

S115

54

13

IC101

+

R191

C139

C138

R165

Q105

BCE

Q103

R192

R193

C137

C134

C148

JW127

JW128

C129

+

HOLD OFF

R194

R195

C136

X101

C135

JC103

R151

R150

R108

R136

L102

C104

S120

HOLD

R138

R196

JW129

R134 R118

L101

R160

S114

LIGHT

JW130

R177

C145

R153

KA

+

C146

3

PRESET TUNING

STATION SELECT/ PRESET

R140

R135

JW131

S111

CLOCK

(M770L)

mb/CLOCK (M770S/M770SL)

R174

L103

R158

Q111

ECB

D103

ECB

Q106

R157

C144

T101

R159

C147

S103S104S105

2

R149

R148

+

C151

C143

AK

D102

R156

R155

R154

C149

D105

D104, 105

(LCD BACK LIGHT)

D104

Q107

BCE

1-684-570-

BAND

T101

S101

R173

S102

1

R176

11

(11)

S116

JW101

R171

R170

S108

R172

JW102

TUNE/

TIME

SET

R167

JW105

JW106

JW107

JW108

JW111

JW112

JW103

JW109

7

JW116

JW110

R147

S107

6

S109

OPERATION

JC106

R161

C121

R125

R106

R107

R112

(M770L)

R126

43

12

M770S/
M770SL

C108

R120

R127

C122

R111

(M770SL)

R117

R115

R128

C123

IC102

R110

1 17

C109

IC103

43

12

JW117

D106

KA

R121

C113

R122

R123

R124

Q110

BCE

R164

S112

SCAN

R137

C115

A

R113

B

R175

S118

C

D

S119

S117

R168

R169

E

F

G

JW113

JW114

R197

C141

R109

R179

JW115

JC105

BCE

Q108

JC107

R102

C140

R162

R163

JW119

JW120

S110

SLEEP

H

R198

R178

R199

1

I

MAIN

BOARD

(Page 10)

A

1212

5-6. SCHEMATIC DIAGRAM – KEY Board – • See page 14 for Waveforms.

14

UCOM DC

15

6V COM

13

(Page 11)

LW=L MW=L SW=H

FM=H SW.MW.LW=L

BAND FM=L

SW.MW.LW=H

SCAN TUNE

AC DETEC

AM OSC

FM OSC

RF GND

VCC

JW120

12

GND

JC106

11

BEEP

4

3

1

2

MUTE

R179

JW125

1k

C115

0.0047

5

6

VT

10

9

8

C141

7

0.01

R199

R178

R198

R197

S111

CLOCK (M770L)

(M770S/M770SL)

mb/CLOCK SLEEP

S105 S104

S101
BAND

S115

STANDBY

TIME SET

C140 C143
100p 0.22

Q101

2SB970

B+ SWITCH

R103 R104

1k 4.7k

Q102

DTC144TUA

POWER ON/OFF

CONTROL SWITCH

1k

1k

1k

1k

S108 S102S103S104S106 S105S107

S110

S112 S113
SCAN

R164

10k

S108

S116 S117

R174R173

10k10k

JW124

Q108 Q105

DTC144TUA 2SC4098

FM/(SW/MW/LW)BAND FM VCO

SELECT SWITCH

D102

1SS355

L103

100µH

C151

10

16V

5 4 3 2 17 6

PRESET TUNING

STATION SELECT/ PRESET

JW115

R172

10k

R175

10k

JW112

R101R102
100k1k

R150R108

47k47

JW123 JC105 JC107

R156

1k

T101

DC/DC

CONVERTER

C144

10p

R163

10k

TIME SET

BUFFER

GND

Q109
2SA1576A
B+ SWITCH

C104

STANDBY

ON/OFF

JW128

S103

TUNE/

C129
1000

6.3V

JW126

R151

470

Q106 Q111

2SC4081 2SC4081

S116S117S118S119

R170

10k

C148

0.01

R162

10k

JW114

R147

10k

JW101

JW109

JW129

R136 R137

1M 4.7k

C142

1000p

Q106,111

R157
100k

CONVERTER

NCNC

OUT

IN

S-81230SG-QB-T1

C105

Q103

DTC144EUA

AC

DETECT

R152

47k

DC/DC

R158 C145
100k 0.1

R159

47k

+3V REGULATOR

IC101

D101R105

1SS3551k

S109

OPERATION

S114
LIGHT

JW127

S102

R176
10k

S106S107

R166
10k

S118

R168
10k

S119

R169
10k

R160

L101

100

3.3mH

Q110 Q104

2SC4081 2SC4081

Q104,110

LOW-PASS

FILTER

JW130

R177

10k

D103

UDZ-TE17-13

ICF-M770L/M770S/M770SL

DETECT

IC103IC102

(M770L)

2.2k

10k

10k

2.2k

2.2k

2.2k

2.2k

2.2k

2.2k

2.2k

2.2k

2.2k

2.2k

1k

R141

10k

4.7k

D104 D105

TOL-31CSGAKAA

-KS01

2SC4081
LED DRIVE

GND NC

OUT IN

(M770L)

(M770S/M770SL)

Q107

R110

R111

(M770L/M770S)

JC103

100k

100k

R109C113

R112

4.7k

KS0

MUTE

BPF

(MW/LW)/SW

POWER

KS1

KS2

KS3

KS4

KR0

KR1

KR2

KR3

TUNE

AC DET

R142

10k

TOL-31CSGAKAA

-KS01

47k0.1

(M770SL)

C109C108

R116 R117R114R115
100k 100k100k100k

AM/

JW131

C149

S120

LCD12

XOUT

HOLD

OFF

HOLD

LCD101

LIQUID CRYSTAL DISPLAY

3

6

100k

100k

100k

100k

LCD7

R184

R183

R182

R181

LCD9

LCD8

LCD11

LCD10

LCD7

LCD6

LCD5

LCD4

LCD3

LCD2

LCD1

LCD0

COM3

COM2

COM1

COM0

REGLCD1

CAPLCD1

CAPLCD0

REGLCD0

REG1

XIN

75KHz

X101

0.1

0.1

22p

C137

C136

C135

2

CD3

LCD

L

LCD4

LCD5

LCD

LCD0

LCD1

C138 C139

0.01 0.1

1

M0
OM
C

CO

COM2

COM

R185
100k

R186

R187

R188

R189

R190

R191

R192

R193

R194

R195

R196

LCD7

LCD6

100k

LCD5

100k

LCD4

100k

LCD3

100k

LCD2

100k

LCD1

100k

LCD0

100k

COM3

100k

COM2

100k

COM1

100k

COM0

100k

0.10.1

JW117

(M770S/M770SL)

100k

R180

BEEP

CEDET

VDET2

VDET1

LCD14

LIQUID CRYSTAL

DISPLAY DRIVER,

KEY CONTROL

µPD17072GB

VCOL

EO

JW122

IC104

-036-1A7

LCD13

VDD

REG0

VCOH

10k

R144

1

27p

0.1

C128

C134

C133

JW134

C132
100p

(FM/TV)

INITIAL2

INITIAL1

SYSTEM CONTROLLER,

GND

LIGHT

HOLD

JW133

C150

47p

R140R143
100k2.2k

D104,105

(LCD BACK LIGHT)

1

VOLTAGE

DETECT

C106
100p10 16V0.01

R161

JW104

JW113

R165

10k

R167

10k

R113

10k

JW111

R138

10

JW132

10k

R134

10k

JW119 JW116

JW103 JW106

JW107JW102

JW110

JW108

R171
10k

C116 R139

0.33 10k

C117

1000p

C118
470p

GND NC

OUT IN

R106 R107

1M 1M

JW135

JW105

1k

R118

D106

1SS355

470p

470p

470p

470p

470p

C130

C124

C123

C122

C121

L102

220µH

R153

22

C146

C147

10

0.1

10V

C152

0.022

VOLTAGE

S-80842ANNPS-80836ANNP

R135

10k

R120

R121

R122

R123

R124

R125

R126

R127

R128

R129

R130

R131

R132

R133

R148 R149R154 R155

680 680680 680

1313

ICF-M770L/M770S/M770SL

p

p

•Waveforms
– KEY Board –

1 Q106 (Base), Q111 (Collector)

380 ns

2 Q106 (Collector)

380 ns

3 IC104 wf (XOUT)

13.3 µs

250 mVp-

5.6 Vp-p

1.7 Vp-

5-7. IC PIN FUNCTION DESCRIPTION

• KEY BOARD IC104 µPD17027GB-036-1A7
(SYSTEM CONTROLLER, LIQUID CRYSTAL DISPLAY DRIVER, KEY CONTROL)

Pin No. Pin Name

I/O
1 KS0 O Key source signal output
2MUTE O Muting on/off control signal output “L”: muting on

3 BPF O

Band selection signal output “L”: SW/MW/LW, “H”: FM

Used for the ICF-M770S/770SL (ICF-M770L: Not used)
4(MW/LW)/SW O Band selection signal output “L”: MW/LW, “H”: SW
5 POWER O Power on/off control signal output for the tuner section “H”: radio power on

6 to 9 KS1 to KS4 O Key source signal output

10 to 13 KR0 to KR3 I Key return signal input

14 TUNED I

Tuning detection signal input “L”: tuned

15 AC DET I AC voltage detection signal input “L”: AC detected
16 LIGHT O LED drive signal output of the liquid crystal display back light “H”: LED on
17 HOLD O HOLD switch input terminal “L”: hold on
18
19 EO O
20 VCOL I
21
22
23

GND — Ground terminal

PLL frequency synthesizer charge pump output

SW/MW/LW VCO input terminal

VCOH I

FM VCO input terminal

REG0 O Voltage regulator output terminal for the PLL

VDD — Power supply terminal (+3V)
24 XOUT O System clock output terminal (75 kHz)
25 XIN I System clock input terminal (75 kHz)
26 REG1 O Voltage regulator output terminal for the oscillator circuit
27 REGLCD0 — Connection terminal of doubler circuit capacitor for liquid crystal display drive power supply
28 CAPLCD0 — Connection terminal of doubler circuit capacitor
29 CAPLCD1 — Connection terminal of doubler circuit capacitor
30 REGLCD1 — Connection terminal of doubler circuit capacitor for liquid crystal display drive power supply

31 to 34 COM0 to COM3 O
35 to 47 LCD0 to LCD12 O

48, 49 LCD13, LCD14 O

Common drive signal output to the liquid crystal display
Segment drive signal output to the liquid crystal display

Segment drive signal output to the liquid crystal display Not used
50 VDET1 I Voltage detection signal input “L”: 2.5V or less
51 CEDET I Voltage detection signal input “L”: 2.5V or less
52 BEEP O Beep sound drive signal output
53 VDET2 I Voltage detection signal input “L”: 2.9V or less
54 INITIAL1 I Model setting input terminal “L”: ICF-M770L, “H”: ICF-M770S/M770SL
55
56

INITIAL2 I Model setting input terminal “L”: ICF-M770L/M770S, “H”: ICF-M770SL

AM/(FM/TV) O Band selection signal output “L”: FM, “H”: SW/MW/LW

Description

1414

SECTION 6

EXPLODED VIEWS

ICF-M770L/M770S/M770SL

NOTE:

• -XX and -X mean standardized parts, so they
may have some difference from the original
one.

• Color Indication of Appearance Parts
Example:
KNOB, BALANCE (WHITE) . . . (RED)

↑↑

Parts Color Cabinet's Color

6-1. CABINET (FRONT) SECTION

#2

• Items marked “*” are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering
these items.

• Accessories are given in the last of the elec­trical parts list.

•When “NET, SPEAKER (Ref. 3)” is being
replaced, “EMBLEM (5-A), SONY (Ref. 5)”
needs to be replaced also.

cabinet (rear) section

7

SP1

The components identified by
mark 0 or dotted line with mark
0 are critical for safety.
Replace only with part number
specified.

#3

8

#3

6

5

4

3

1

2

Ref. No. Part No. Description Remark

1 3-237-047-01 PANEL (M770SL)
1 3-237-047-11 PANEL (M770S)
1 3-237-047-21 PANEL (M770L)
2 3-237-052-01 PLATE, TRANSPARENT
3 3-237-061-01 NET, SPEAKER

9

#1

10

chassis section

8

11

12

13

Ref. No. Part No. Description Remark

9 3-013-190-01 SPRING (JOG), RING
10 3-237-049-01 KNOB (JOG)
11 3-237-050-01 KNOB (CONTROL) (VOL)
12 3-237-050-11 KNOB (CONTROL) (TONE)
13 3-237-021-01 CABINET (FRONT)

4 3-237-057-01 KNOB (HOLD)
5 4-925-334-41 EMBLEM (5-A), SONY
6 3-237-062-01 SHEET, SPEAKER
7 3-237-048-01 BUTTON (PRESET)
8 3-014-055-01 FOOT, RUBBER

SP1 1-825-130-11 SPEAKER (12cm)
#1 7-685-105-14 TAPPING +P 2X8 NON-SLIT
#2 7-685-903-21 SCREW +PTPWH 3X8 (TYPE2)
#3 7-685-549-14 SCREW +BTP3X14 TYPE2 N-S

15

ICF-M770L/M770S/M770SL

6-2. CABINET (REAR) SECTION

ANT1

not
supplied

#6

not
supplied

55

57

#6

T202

#6

65

53

56

54

64

58

#5

#5

59

#4

63

60

59

58

61

62

64

Ref. No. Part No. Description Remark

51 3-237-053-01 LID, BATTERY CASE
52 3-939-499-01 CUSHION (BATT)
53 3-237-064-01 TERMINAL (-), BATTERY

* 54 1-684-567-11 INLET BOARD
* 55 1-684-569-11 POWER BOARD

56 3-228-709-01 PLATE, ANTENNA CONTACT

* 57 1-684-568-11 JACK BOARD

58 3-237-056-01 SHAFT (HANDLE)
59 3-237-336-01 SPRING (HANDLE) (R)
60 3-237-054-01 HANDLE

16

52

51

The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.

Ref. No. Part No. Description Remark

61 3-237-065-01 TERMINAL (+/-), BATTERY
62 3-237-022-01 CABINET (REAR)
63 3-237-063-01 TERMINAL (+), BATTERY
64 3-244-251-01 CUSHION (A)
65 3-880-474-01 CUSHION, 15X5X0.3

ANT1 1-501-321-51 ANTENNA, TELESCOPIC

0 T202 1-435-614-11 TRANSFORMER, POWER

#4 7-682-149-13 SCREW +P 3X10
#5 7-685-102-19 SCREW +P 2X4 TYPE2 NON-SLIT
#6 7-685-134-19 SCREW +P 2.6X8 TYPE2 NON-SLIT

6-3. CHASSIS SECTION

ICF-M770L/M770S/M770SL

L5

108

not
supplied

LCD101

key board

#1

101

102

107

not
supplied

104

109

main board

105

103

106

Ref. No. Part No. Description Remark

* 101 A-3021-849-A KEY BOARD, COMPLETE (M770SL)
* 101 A-3021-855-A KEY BOARD, COMPLETE (M770S)

101 A-3021-877-A KEY BOARD, COMPLETE (M770L)
102 3-237-051-01 HOLDER, LCD
103 3-237-055-01 ARM (JOG)

104 3-237-058-01 HOLDER (FERRITE-ROD ANTENNA)

* 105 A-3021-848-A MAIN BOARD, COMPLETE (M770SL)
* 105 A-3021-854-A MAIN BOARD, COMPLETE (M770S)

105 A-3021-876-A MAIN BOARD, COMPLETE (M770L)

Ref. No. Part No. Description Remark

106 3-237-023-01 CHASSIS

* 107 3-010-281-01 SPACER (B)

108 3-244-087-01 SHEET (A)
109 3-559-407-01 CUSHION, STOPPER
L5 1-428-955-11 COIL, FERRITE-ROD ANTENNA (MW) (M770S)

L5 1-428-956-11 COIL, FERRITE-ROD ANTENNA (M770L)
L5 1-501-954-21 ANTENNA, FERRITE-ROD (LW) (M770SL)
LCD101 1-804-671-11 DISPLAY PANEL, LIQUID CRYSTAL
#1 7-685-105-14 TAPPING +P 2X8 NON-SLIT

17

ICF-M770L/M770S/M770SL

SECTION 7

INLET JACK KEY

NOTE:

•Due to standardization, replacements in the
parts list may be different from the parts speci­fied in the diagrams or the components used
on the set.

• -XX and -X mean standardized parts, so they
may have some difference from the original
one.

• RESISTORS
All resistors are in ohms.
METAL: Metal-film resistor.
METAL OXIDE: Metal oxide-film resistor.
F: nonflammable

Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark

* 1-684-567-11 INLET BOARD

***********

< JACK >

ELECTRICAL PARTS LIST

• Items marked “*” are not stocked since they
are seldom required for routine service.
Some delay should be anticipated when order­ing these items.

• SEMICONDUCTORS
In each case, u: µ, for example:
uA. . : µA. . uPA. . : µPA. .
uPB. . : µPB. . uPC. . : µPC. .
uPD. . : µPD. .

• CAPACITORS
uF: µF

• COILS
uH: µH

* A-3021-849-A KEY BOARD, COMPLETE (M770SL)
* A-3021-855-A KEY BOARD, COMPLETE (M770S)
* A-3021-877-A KEY BOARD, COMPLETE (M770L)

The components identified by
mark 0 or dotted line with mark
0 are critical for safety.
Replace only with part number
specified.

When indicating parts by reference
number, please include the board.

********************

0 J301 1-526-838-31 INLET, AC 2P (- AC IN)

**************************************************************

* 1-684-568-11 JACK BOARD

***********

< CAPACITOR >

C202 1-162-927-11 CERAMIC CHIP 100PF 5% 50V
C203 1-126-934-11 ELECT 220uF 20% 16V
C204 1-126-768-11 ELECT 2200uF 20% 16V
C205 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C206 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V

C207 1-164-227-11 CERAMIC CHIP 0.022uF 10% 25V

< DIODE >

D201 8-719-988-61 DIODE 1SS355TE-17
D202 8-719-988-61 DIODE 1SS355TE-17
D203 8-719-988-61 DIODE 1SS355TE-17
D204 8-719-988-61 DIODE 1SS355TE-17
D205 8-719-052-88 DIODE 1N4002

D206 8-719-052-88 DIODE 1N4002

< JACK >

J201 1-563-836-21 JACK (v)

< TRANSISTOR >

Q201 8-729-011-92 TRANSISTOR 2SC2001TP-K1K2

< RESISTOR >

R201 1-216-809-11 METAL CHIP 100 5% 1/10W
R202 1-216-805-11 METAL CHIP 47 5% 1/10W
R203 1-216-825-11 METAL CHIP 2.2K 5% 1/10W

**************************************************************

* 3-010-281-01 SPACER (B)

3-237-051-01 HOLDER, LCD

< CAPACITOR >

C104 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C105 1-104-396-11 ELECT 10uF 20% 16V
C106 1-162-927-11 CERAMIC CHIP 100PF 5% 50V
C108 1-164-156-11 CERAMIC CHIP 0.1uF 25V
C109 1-164-156-11 CERAMIC CHIP 0.1uF 25V

C113 1-115-156-11 CERAMIC CHIP 1uF 10V
C115 1-162-968-11 CERAMIC CHIP 0.0047uF 10% 50V
C116 1-110-501-11 CERAMIC CHIP 0.33uF 10% 16V
C117 1-115-416-11 CERAMIC CHIP 0.001uF 5% 25V
C118 1-164-315-11 CERAMIC CHIP 470PF 5% 50V

C121 1-164-315-11 CERAMIC CHIP 470PF 5% 50V
C122 1-164-315-11 CERAMIC CHIP 470PF 5% 50V
C123 1-164-315-11 CERAMIC CHIP 470PF 5% 50V
C124 1-164-315-11 CERAMIC CHIP 470PF 5% 50V
C128 1-115-156-11 CERAMIC CHIP 1uF 10V

C129 1-126-916-11 ELECT 1000uF 20% 6.3V
C130 1-164-315-11 CERAMIC CHIP 470PF 5% 50V
C132 1-162-927-11 CERAMIC CHIP 100PF 5% 50V
C133 1-164-156-11 CERAMIC CHIP 0.1uF 25V
C134 1-162-920-11 CERAMIC CHIP 27PF 5% 50V

C135 1-162-919-11 CERAMIC CHIP 22PF 5% 50V
C136 1-164-156-11 CERAMIC CHIP 0.1uF 25V
C137 1-164-156-11 CERAMIC CHIP 0.1uF 25V
C138 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C139 1-164-156-11 CERAMIC CHIP 0.1uF 25V

C140 1-162-927-11 CERAMIC CHIP 100PF 5% 50V
C141 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C142 1-115-416-11 CERAMIC CHIP 0.001uF 5% 25V
C143 1-165-128-11 CERAMIC CHIP 0.22uF 16V
C144 1-162-915-11 CERAMIC CHIP 10PF 0.5PF 50V

18

C145 1-164-156-11 CERAMIC CHIP 0.1uF 25V
C146 1-124-261-00 ELECT 10uF 20% 50V
C147 1-164-156-11 CERAMIC CHIP 0.1uF 25V
C148 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C149 1-115-156-11 CERAMIC CHIP 1uF 10V

ICF-M770L/M770S/M770SL

KEY

Ref. No. Part No. Description Remark

C150 1-162-923-11 CERAMIC CHIP 47PF 5% 50V
C151 1-104-396-11 ELECT 10uF 20% 16V
C152 1-164-227-11 CERAMIC CHIP 0.022uF 10% 25V

< DIODE >

D101 8-719-988-61 DIODE 1SS355TE-17
D102 8-719-988-61 DIODE 1SS355TE-17
D103 8-719-083-63 DIODE UDZSTE-1713B
D104 6-500-040-01 LED TOL-31CSGAKAA-KS01

(LCD BACK LIGHT)

D105 6-500-040-01 LED TOL-31CSGAKAA-KS01

(LCD BACK LIGHT)

D106 8-719-988-61 DIODE 1SS355TE-17

< IC >

IC101 8-759-198-63 IC S-81230SG-QB-T1
IC102 6-702-128-01 IC S-80836ANNP-ED0-T2
IC103 8-759-582-91 IC S-80842ANNP-ED6-T2
IC104 6-801-726-01 IC uPD17072GB-036-1A7

< RESISTOR >

JC103 1-216-864-11 SHORT CHIP 0
JC105 1-216-864-11 SHORT CHIP 0
JC106 1-216-864-11 SHORT CHIP 0
JC107 1-216-864-11 SHORT CHIP 0

< COIL >

L101 1-410-065-11 INDUCTOR 3.3mH
L102 1-410-525-11 INDUCTOR 220uH
L103 1-410-521-11 INDUCTOR 100uH

< LIQUID CRYSTAL DISPLAY >

LCD101 1-804-671-11 DISPLAY PANEL, LIQUID CRYSTAL

< TRANSISTOR >

Ref. No. Part No. Description Remark

R111 1-216-845-11 METAL CHIP 100K 5% 1/10W
R112 1-216-829-11 METAL CHIP 4.7K 5% 1/10W
R113 1-216-833-11 METAL CHIP 10K 5% 1/10W
R114 1-216-845-11 METAL CHIP 100K 5% 1/10W

(M770L/M770S)

R115 1-216-845-11 METAL CHIP 100K 5% 1/10W

(M770L)

R116 1-216-845-11 METAL CHIP 100K 5% 1/10W

(M770SL)

R117 1-216-845-11 METAL CHIP 100K 5% 1/10W

(M770S/M770SL)
R118 1-216-821-11 METAL CHIP 1K 5% 1/10W
R120 1-216-825-11 METAL CHIP 2.2K 5% 1/10W
R121 1-216-833-11 METAL CHIP 10K 5% 1/10W

R122 1-216-833-11 METAL CHIP 10K 5% 1/10W
R123 1-216-825-11 METAL CHIP 2.2K 5% 1/10W
R124 1-216-825-11 METAL CHIP 2.2K 5% 1/10W
R125 1-216-825-11 METAL CHIP 2.2K 5% 1/10W
R126 1-216-825-11 METAL CHIP 2.2K 5% 1/10W

R127 1-216-825-11 METAL CHIP 2.2K 5% 1/10W
R128 1-216-825-11 METAL CHIP 2.2K 5% 1/10W
R129 1-216-825-11 METAL CHIP 2.2K 5% 1/10W
R130 1-216-825-11 METAL CHIP 2.2K 5% 1/10W
R131 1-216-825-11 METAL CHIP 2.2K 5% 1/10W

R132 1-216-825-11 METAL CHIP 2.2K 5% 1/10W
R133 1-216-821-11 METAL CHIP 1K 5% 1/10W
R134 1-216-833-11 METAL CHIP 10K 5% 1/10W
R135 1-216-833-11 METAL CHIP 10K 5% 1/10W
R136 1-216-857-11 METAL CHIP 1M 5% 1/10W

R137 1-216-829-11 METAL CHIP 4.7K 5% 1/10W
R138 1-216-797-11 METAL CHIP 10 5% 1/10W
R139 1-216-833-11 METAL CHIP 10K 5% 1/10W
R140 1-216-845-11 METAL CHIP 100K 5% 1/10W
R141 1-216-829-11 METAL CHIP 4.7K 5% 1/10W

(M770S/M770SL)

Q101 8-729-046-89 TRANSISTOR 2SB970-S (TX).S0
Q102 8-729-029-15 TRANSISTOR DTC144TUA-T106
Q103 8-729-029-14 TRANSISTOR DTC144EUA-T106
Q104 8-729-905-35 TRANSISTOR 2SC4081-R
Q105 8-729-054-77 TRANSISTOR 2SC4098-T106-PQ

Q106 8-729-905-35 TRANSISTOR 2SC4081-R
Q107 8-729-905-35 TRANSISTOR 2SC4081-R
Q108 8-729-029-15 TRANSISTOR DTC144TUA-T106
Q109 8-729-026-52 TRANSISTOR 2SA1576A-T106-R
Q110 8-729-905-35 TRANSISTOR 2SC4081-R

Q111 8-729-905-35 TRANSISTOR 2SC4081-R

< RESISTOR >

R101 1-216-845-11 METAL CHIP 100K 5% 1/10W
R102 1-216-821-11 METAL CHIP 1K 5% 1/10W
R103 1-216-821-11 METAL CHIP 1K 5% 1/10W
R104 1-216-829-11 METAL CHIP 4.7K 5% 1/10W
R105 1-216-821-11 METAL CHIP 1K 5% 1/10W

R106 1-216-857-11 METAL CHIP 1M 5% 1/10W
R107 1-216-857-11 METAL CHIP 1M 5% 1/10W
R108 1-216-805-11 METAL CHIP 47 5% 1/10W
R109 1-216-841-11 METAL CHIP 47K 5% 1/10W
R110 1-216-845-11 METAL CHIP 100K 5% 1/10W

R141 1-216-833-11 METAL CHIP 10K 5% 1/10W

(M770L)
R142 1-216-833-11 METAL CHIP 10K 5% 1/10W
R143 1-216-825-11 METAL CHIP 2.2K 5% 1/10W
R144 1-216-833-11 METAL CHIP 10K 5% 1/10W
R147 1-216-833-11 METAL CHIP 10K 5% 1/10W

R148 1-216-819-11 METAL CHIP 680 5% 1/10W
R149 1-216-819-11 METAL CHIP 680 5% 1/10W
R150 1-216-841-11 METAL CHIP 47K 5% 1/10W
R151 1-216-817-11 METAL CHIP 470 5% 1/10W
R152 1-216-841-11 METAL CHIP 47K 5% 1/10W

R153 1-216-801-11 METAL CHIP 22 5% 1/10W
R154 1-216-819-11 METAL CHIP 680 5% 1/10W
R155 1-216-819-11 METAL CHIP 680 5% 1/10W
R156 1-216-821-11 METAL CHIP 1K 5% 1/10W
R157 1-216-845-11 METAL CHIP 100K 5% 1/10W

R158 1-216-845-11 METAL CHIP 100K 5% 1/10W
R159 1-216-841-11 METAL CHIP 47K 5% 1/10W
R160 1-216-809-11 METAL CHIP 100 5% 1/10W
R161 1-216-833-11 METAL CHIP 10K 5% 1/10W
R162 1-216-833-11 METAL CHIP 10K 5% 1/10W

R163 1-216-833-11 METAL CHIP 10K 5% 1/10W
R164 1-216-833-11 METAL CHIP 10K 5% 1/10W

19

ICF-M770L/M770S/M770SL

KEY MAIN

Ref. No. Part No. Description Remark

R165 1-216-833-11 METAL CHIP 10K 5% 1/10W
R166 1-216-833-11 METAL CHIP 10K 5% 1/10W
R167 1-216-833-11 METAL CHIP 10K 5% 1/10W

R168 1-216-833-11 METAL CHIP 10K 5% 1/10W
R169 1-216-833-11 METAL CHIP 10K 5% 1/10W
R170 1-216-833-11 METAL CHIP 10K 5% 1/10W
R171 1-216-833-11 METAL CHIP 10K 5% 1/10W
R172 1-216-833-11 METAL CHIP 10K 5% 1/10W

R173 1-216-833-11 METAL CHIP 10K 5% 1/10W
R174 1-216-833-11 METAL CHIP 10K 5% 1/10W
R175 1-216-833-11 METAL CHIP 10K 5% 1/10W
R176 1-216-833-11 METAL CHIP 10K 5% 1/10W
R177 1-216-833-11 METAL CHIP 10K 5% 1/10W

R178 1-216-821-11 METAL CHIP 1K 5% 1/10W
R179 1-216-821-11 METAL CHIP 1K 5% 1/10W
R180 1-216-845-11 METAL CHIP 100K 5% 1/10W
R181 1-216-845-11 METAL CHIP 100K 5% 1/10W
R182 1-216-845-11 METAL CHIP 100K 5% 1/10W

R183 1-216-845-11 METAL CHIP 100K 5% 1/10W
R184 1-216-845-11 METAL CHIP 100K 5% 1/10W
R185 1-216-845-11 METAL CHIP 100K 5% 1/10W
R186 1-216-845-11 METAL CHIP 100K 5% 1/10W
R187 1-216-845-11 METAL CHIP 100K 5% 1/10W

R188 1-216-845-11 METAL CHIP 100K 5% 1/10W
R189 1-216-845-11 METAL CHIP 100K 5% 1/10W
R190 1-216-845-11 METAL CHIP 100K 5% 1/10W
R191 1-216-845-11 METAL CHIP 100K 5% 1/10W
R192 1-216-845-11 METAL CHIP 100K 5% 1/10W

R193 1-216-845-11 METAL CHIP 100K 5% 1/10W
R194 1-216-845-11 METAL CHIP 100K 5% 1/10W
R195 1-216-845-11 METAL CHIP 100K 5% 1/10W
R196 1-216-845-11 METAL CHIP 100K 5% 1/10W
R197 1-216-821-11 METAL CHIP 1K 5% 1/10W

R198 1-216-821-11 METAL CHIP 1K 5% 1/10W
R199 1-216-821-11 METAL CHIP 1K 5% 1/10W

< SWITCH >

Ref. No. Part No. Description Remark

S120 1-571-850-91 SWITCH, SLIDE (HOLD)

< TRANSFORMER >

T101 1-449-138-91 TRANSFORMER, DC/DC CONVERTER

< VIBRATOR >

X101 1-767-517-11 VIBRATOR, CRYSTAL (75kHz)

**************************************************************

* A-3021-848-A MAIN BOARD, COMPLETE (M770SL)
* A-3021-854-A MAIN BOARD, COMPLETE (M770S)
* A-3021-876-A MAIN BOARD, COMPLETE (M770L)

*********************

3-237-058-01 HOLDER (FERRITE-ROD ANTENNA)

< BAND PASS FILTER >

BPF1 1-236-022-11 FILTER, BAND PASS

< CAPACITOR >

C1 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C2 1-162-923-11 CERAMIC CHIP 47PF 5% 50V

(M770L)

C3 1-115-416-11 CERAMIC CHIP 0.001uF 5% 25V

(M770S/M770SL)

C4 1-162-910-11 CERAMIC CHIP 5PF 0.25PF 50V

(M770S/M770SL)

C5 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V

(M770S/M770SL)

C6 1-162-910-11 CERAMIC CHIP 5PF 0.25PF 50V

(M770S/M770SL)
C7 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C8 1-126-382-11 ELECT 100uF 20% 10V

(M770S/M770SL)
C10 1-162-917-11 CERAMIC CHIP 15PF 5% 50V

(M770S/M770SL)
C11 1-162-927-11 CERAMIC CHIP 100PF 5% 50V

(M770L/M770SL)

S101 1-554-088-00 SWITCH, KEY BOARD (BAND)
S102 1-554-088-00 SWITCH, KEY BOARD (1)
S103 1-554-088-00 SWITCH, KEY BOARD (2)
S104 1-554-088-00 SWITCH, KEY BOARD (3)
S105 1-554-088-00 SWITCH, KEY BOARD (4)

S106 1-554-088-00 SWITCH, KEY BOARD (5)
S107 1-554-088-00 SWITCH, KEY BOARD (6)
S108 1-554-088-00 SWITCH, KEY BOARD (7)
S109 1-771-906-11 SWITCH, KEY BOARD (OPERATION)
S110 1-771-906-11 SWITCH, KEY BOARD (SLEEP)

S111 1-771-906-11 SWITCH, KEY BOARD (CLOCK) (M770L)
S111 1-771-906-11 SWITCH, KEY BOARD (mb/CLOCK)

(M770S/M770SL)
S112 1-771-906-11 SWITCH, KEY BOARD (SCAN)
S113 1-771-906-11 SWITCH, KEY BOARD (STANDBY ON/OFF)
S114 1-771-906-11 SWITCH, KEY BOARD (LIGHT)

S115 1-771-906-11 SWITCH, KEY BOARD (STANDBY TIME SET)
S116 1-786-267-21 SWITCH, TACT (TUNE/TIME SET )
S117 1-786-267-21 SWITCH, TACT (TUNE/TIME SET )

U
U

u
u

S118 1-786-267-21 SWITCH, TACT (TUNE/TIME SET U)
S119 1-786-267-21 SWITCH, TACT (TUNE/TIME SET u)

20

C12 1-162-923-11 CERAMIC CHIP 47PF 5% 50V

(M770S/M770SL)

C13 1-164-315-11 CERAMIC CHIP 470PF 5% 50V

(M770L)

C14 1-162-925-11 CERAMIC CHIP 68PF 5% 50V

(M770L)

C15 1-162-969-11 CERAMIC CHIP 0.0068uF 10% 25V

(M770S/M770SL)

C15 1-164-392-11 CERAMIC CHIP 390PF 5% 50V

(M770L)

C16 1-162-910-11 CERAMIC CHIP 5PF 0.25PF 50V

(M770S/M770SL)

C16 1-162-917-11 CERAMIC CHIP 15PF 5% 50V

(M770L)

C17 1-162-959-11 CERAMIC CHIP 330PF 5% 50V

(M770L)
C18 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C19 1-162-917-11 CERAMIC CHIP 15PF 5% 50V

(M770S)

C19 1-162-959-11 CERAMIC CHIP 330PF 5% 50V

(M770SL)

C20 1-164-227-11 CERAMIC CHIP 0.022uF 10% 25V

ICF-M770L/M770S/M770SL

MAIN

Ref. No. Part No. Description Remark

C21 1-162-927-11 CERAMIC CHIP 100PF 5% 50V

(M770SL)

C21 1-164-392-11 CERAMIC CHIP 390PF 5% 50V

(M770S)

C22 1-162-925-11 CERAMIC CHIP 68PF 5% 50V

(M770S)

C22 1-162-959-11 CERAMIC CHIP 330PF 5% 50V

(M770SL)

C23 1-162-921-11 CERAMIC CHIP 33PF 5% 50V

(M770L)
C24 1-115-416-11 CERAMIC CHIP 0.001uF 5% 25V
C25 1-162-910-11 CERAMIC CHIP 5PF 0.25PF 50V
C27 1-115-416-11 CERAMIC CHIP 0.001uF 5% 25V

C28 1-162-915-11 CERAMIC CHIP 10PF 0.5PF 50V
C29 1-162-907-11 CERAMIC CHIP 2PF 0.25PF 50V
C30 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C32 1-115-467-11 CERAMIC CHIP 0.22uF 10% 10V
C33 1-126-514-11 ELECT 22uF 20% 10V

C34 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C35 1-126-163-11 ELECT 4.7uF 20% 50V
C36 1-164-156-11 CERAMIC CHIP 0.1uF 25V
C37 1-162-927-11 CERAMIC CHIP 100PF 5% 50V
C38 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V

C40 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C41 1-126-963-11 ELECT 4.7uF 20% 50V
C42 1-126-963-11 ELECT 4.7uF 20% 50V
C43 1-164-227-11 CERAMIC CHIP 0.022uF 10% 25V
C44 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V

C45 1-115-467-11 CERAMIC CHIP 0.22uF 10% 10V
C46 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C47 1-165-176-11 CERAMIC CHIP 0.047uF 10% 16V
C48 1-128-551-11 ELECT 22uF 20% 25V
C50 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V

C51 1-126-935-11 ELECT 470uF 20% 16V
C52 1-164-505-11 CERAMIC CHIP 2.2uF 16V
C54 1-126-926-11 ELECT 1000uF 20% 10V
C55 1-164-227-11 CERAMIC CHIP 0.022uF 10% 25V
C56 1-162-923-11 CERAMIC CHIP 47PF 5% 50V

C57 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C58 1-162-927-11 CERAMIC CHIP 100PF 5% 50V
C59 1-162-915-11 CERAMIC CHIP 10PF 0.5PF 50V

(M770SL)
C61 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V
C62 1-126-176-11 ELECT 220uF 20% 10V

C63 1-162-927-11 CERAMIC CHIP 100PF 5% 50V
C64 1-162-927-11 CERAMIC CHIP 100PF 5% 50V
C65 1-162-927-11 CERAMIC CHIP 100PF 5% 50V
C66 1-164-227-11 CERAMIC CHIP 0.022uF 10% 25V
C67 1-164-227-11 CERAMIC CHIP 0.022uF 10% 25V

C73 1-162-907-11 CERAMIC CHIP 2PF 0.25PF 50V

(M770L)

Ref. No. Part No. Description Remark

< TRIMMER >

CT1 1-141-601-11 CAP, ADJ 10PF
CT2 1-141-622-11 CAP, ADJ 50PF (M770L/M770SL)
CT2 1-141-601-11 CAP, ADJ 10PF (M770S)
CT3 1-141-622-11 CAP, ADJ 50PF (M770L)
CT4 1-141-601-11 CAP, ADJ 10PF

< DIODE >

D1 8-719-072-59 DIODE SVC347S-TL
D2 8-719-072-59 DIODE SVC347S-TL
D5 8-719-062-51 DIODE 1PS226-115
D6 8-719-084-67 DIODE HVU202ATRU
D7 8-719-084-67 DIODE HVU202ATRU

D8 8-719-044-76 DIODE 1SS356-TW11 (M770S/M770SL)
D9 8-719-941-86 DIODE DAN202U

< IC >

IC1 8-752-037-02 IC CXA1019S

< RESISTOR >

JC1 1-216-864-11 SHORT CHIP 0 (M770S/M770SL)
JC2 1-216-864-11 SHORT CHIP 0 (M770L)
JC3 1-216-864-11 SHORT CHIP 0 (M770S/M770SL)
JC4 1-216-864-11 SHORT CHIP 0 (M770L)
JC5 1-216-864-11 SHORT CHIP 0 (M770L)

JC6 1-216-864-11 SHORT CHIP 0 (M770L)
JC7 1-216-864-11 SHORT CHIP 0
JC8 1-216-864-11 SHORT CHIP 0 (M770S/M770SL)
JC10 1-216-864-11 SHORT CHIP 0 (M770S/M770SL)
JC11 1-216-864-11 SHORT CHIP 0

JC13 1-216-864-11 SHORT CHIP 0
JC14 1-216-864-11 SHORT CHIP 0 (M770S/M770SL)
JC15 1-216-864-11 SHORT CHIP 0

< COIL >

L1 1-410-509-11 INDUCTOR 10uH (M770S/M770SL)
L2 1-410-513-11 INDUCTOR 22uH (M770S/M770SL)
L3 1-409-513-31 COIL (OSC) (M770S/M770SL)
L5 1-428-955-11 COIL, FERRITE-ROD ANTENNA (MW) (M770S)
L5 1-428-956-11 COIL, FERRITE-ROD ANTENNA (M770L)

L5 1-501-954-21 ANTENNA, FERRITE-ROD (LW) (M770SL)
L6 1-410-294-31 INDUCTOR 38uH
L7 1-410-517-11 INDUCTOR 47uH (M770S/M770SL)
L8 1-406-485-11 COIL (OSC) (M770L)
L8 1-409-513-31 COIL (OSC) (M770S/M770SL)

L9 1-410-525-11 INDUCTOR 220uH
L10 1-406-485-11 COIL (OSC) (M770S/M770SL)
L11 1-410-517-11 INDUCTOR 47uH (M770S/M770SL)
L12 1-422-131-00 COIL, FM OSCILLATION
L13 1-428-290-11 COIL, AIR-CORE

< CERAMIC FILTER >

CF1 1-578-677-21 FILTER, CRYSTAL (450kHz) (M770L)
CF1 1-795-323-11 FILTER, CERAMIC (450kHz) (M770S/M770SL)
CF2 1-567-390-11 FILTER, CERAMIC (10.7MHz)
CF3 1-567-390-11 FILTER, CERAMIC (10.7MHz)
CF4 1-567-050-00 FILTER, CERAMIC (10.7MHz)

L14 1-456-020-11 COIL, AIR-CORE
L15 1-410-525-11 INDUCTOR 220uH (M770S/M770SL)
L16 1-410-521-11 INDUCTOR 100uH (M770S/M770SL)

< TRANSISTOR >

Q1 8-729-123-86 FET 2SK238-K16

(M770S/M770SL)

21

ICF-M770L/M770S/M770SL

Ver 1.1

MAIN PO WER

Ref. No. Part No. Description Remark

Q2 8-729-028-92 TRANSISTOR DTA144TUA-T106

(M770S/M770SL)

Q3 8-729-029-15 TRANSISTOR DTC144TUA-T106

(M770S/M770SL)
Q4 8-729-054-77 TRANSISTOR 2SC4098-T106-PQ (M770L)
Q4 8-729-034-58 TRANSISTOR 2SC4555-6.7-TL

(M770S/M770SL)

Q5 8-729-029-15 TRANSISTOR DTC144TUA-T106

(M770S/M770SL)
Q6 8-729-905-35 TRANSISTOR 2SC4081-R (M770L)
Q7 8-729-026-52 TRANSISTOR 2SA1576A-T106-R

(M770S/M770SL)
Q8 8-729-054-77 TRANSISTOR 2SC4098-T106-PQ
Q9 8-729-026-52 TRANSISTOR 2SA1576A-T106-R

Q10 8-729-029-15 TRANSISTOR DTC144TUA-T106
Q11 8-729-905-35 TRANSISTOR 2SC4081-R
Q12 8-729-905-35 TRANSISTOR 2SC4081-R

< RESISTOR >

R1 1-216-829-11 METAL CHIP 4.7K 5% 1/10W

(M770S/M770SL)
R2 1-216-809-11 METAL CHIP 100 5% 1/10W

(M770S/M770SL)
R3 1-216-829-11 METAL CHIP 4.7K 5% 1/10W

(M770S/M770SL)
R5 1-216-821-11 METAL CHIP 1K 5% 1/10W

(M770S/M770SL)
R6 1-216-829-11 METAL CHIP 4.7K 5% 1/10W

(M770L)

R7 1-216-825-11 METAL CHIP 2.2K 5% 1/10W

(M770S/M770SL)
R8 1-216-833-11 METAL CHIP 10K 5% 1/10W
R9 1-216-845-11 METAL CHIP 100K 5% 1/10W

(M770S/M770SL)
R10 1-216-821-11 METAL CHIP 1K 5% 1/10W

(M770S/M770SL)
R11 1-216-857-11 METAL CHIP 1M 5% 1/10W

R12 1-216-827-11 METAL CHIP 3.3K 5% 1/10W

(M770L)

R12 1-216-833-11 METAL CHIP 10K 5% 1/10W

(M770S/M770SL)
R13 1-216-857-11 METAL CHIP 1M 5% 1/10W
R14 1-216-857-11 METAL CHIP 1M 5% 1/10W

(M770S/M770SL)
R15 1-216-833-11 METAL CHIP 10K 5% 1/10W

Ref. No. Part No. Description Remark

R32 1-216-829-11 METAL CHIP 4.7K 5% 1/10W
R33 1-216-841-11 METAL CHIP 47K 5% 1/10W
R34 1-216-817-11 METAL CHIP 470 5% 1/10W

(M770S/M770SL)

< VARIABLE RESISTOR >

RV1 1-225-498-11 RES, VAR, CARBON 50K (VOL)
RV2 1-225-499-11 RES, VAR, CARBON 10K (TONE)

< TRANSFORMER >

T1 1-404-902-51 TRANSFORMER, IF (M770L)
T1 1-435-886-21 TRANSFORMER, IF (M770S/M770SL)

**************************************************************

* 1-684-569-11 POWER BOARD

*************

< TRANSFORMER >

0 T202 1-435-614-11 TRANSFORMER, POWER

************************************************************

MISCELLANEOUS

**************

ANT1 1-501-321-51 ANTENNA, TELESCOPIC
SP1 1-825-130-11 SPEAKER (12cm)

************************************************************

ACCESSORIES

************

0 1-751-115-11 CORD, POWER (M770L: UK)
0 1-696-562-11 CORD, POWER (M770L: AEP/M770S/M770SL)

3-238-575-11 MANUAL, INSTRUCTION (ENGLISH, FRENCH,

SPANISH, GERMAN, DUTCH)

3-238-575-21 MANUAL, INSTRUCTION (SWEDISH, ITALIAN,

PORTUGUESE, FINNISH)

(AEP, Italian)

3-238-575-31 MANUAL, INSTRUCTION (POLISH)

(East European)

R16 1-216-837-11 METAL CHIP 22K 5% 1/10W

(M770S/M770SL)
R17 1-216-845-11 METAL CHIP 100K 5% 1/10W
R18 1-216-845-11 METAL CHIP 100K 5% 1/10W
R19 1-216-827-11 METAL CHIP 3.3K 5% 1/10W
R20 1-216-821-11 METAL CHIP 1K 5% 1/10W

R21 1-216-837-11 METAL CHIP 22K 5% 1/10W
R22 1-216-815-11 METAL CHIP 330 5% 1/10W
R23 1-216-821-11 METAL CHIP 1K 5% 1/10W
R24 1-216-829-11 METAL CHIP 4.7K 5% 1/10W
R25 1-216-841-11 METAL CHIP 47K 5% 1/10W

R27 1-216-805-11 METAL CHIP 47 5% 1/10W
R28 1-216-825-11 METAL CHIP 2.2K 5% 1/10W
R29 1-216-815-11 METAL CHIP 330 5% 1/10W
R30 1-216-821-11 METAL CHIP 1K 5% 1/10W
R31 1-216-809-11 METAL CHIP 100 5% 1/10W

22

The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.

MEMO

ICF-M770L/M770S/M770SL

23

ICF-M770L/M770S/M770SL

REVISION HISTORY

Clicking the version allows you to jump to the revised page.
Also, clicking the version at the upper right on the revised page allows you to jump to the next revised
page.

Ver. Date Description of Revision

1.0 2002.03 New

1.1 2002.06 Addition of East European model (ICF-M770S) (ENG-02024)