Sony ICF-M770L User manual

SERVICE MANUAL
ICF-M770L
FM/MW/LW PLL SYNTHESIZED
ICF-M770S
FM/SW/MW PLL SYNTHESIZED
ICF-M770SL
FM/SW/LW PLL SYNTHESIZED
AEP Model
ICF-M770L/M770SL
UK Model
ICF-M770L
Italian Model
East European Model
ICF-M770S
SPECIFICATIONS
ICF-M770L/M770S/M770SL
Ver 1.12002.06
9-873-657-02 Sony Corporation
2002F0500-1 Personal Audio Company
C2002.06 Published by Sony Engineering Corporation
Photo: ICF-M770SL
Time display: 24-hour system
Frequency range:
Band ICF-M770L ICF-M770S ICF-M770SL Channel
step
FM 87.5 – 87.5 – 87.5 – 0.05 MHz
108 MHz 108 MHz 108 MHz
SW — 5 800 – 5 800 – 5 kHz
15 900 kHz 15 900 kHz
MW 531 – 531 – — 9 kHz
1 602 kHz 1 602 kHz
LW 153 – — 153 – 9 kHz
279 kHz 279 kHz
Speaker: 12 cm (43⁄4inches), 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 ×61⁄4×27⁄8inches) incl. projecting
parts and controls
Mass: Approx. 1 540 g (3lb 6oz) incl. batteries
Supplied accessories: AC power cord (1)
Design and specifications are subject to change
without notice.

2
ICF-M770L/M770S/M770SL
CF2
CF3
mark
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
7. ELECTRICAL PARTS LIST .............................. 18
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED
LINE WITH MARK 0ON 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 MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.
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.
SECTION 1
SERVICING NOTE
Mark Center frequency
red 10.70 MHz
blue 10.67 MHz
orange 10.73 MHz
black 10.64 MHz
white 10.76 MHz
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.

3
ICF-M770L/M770S/M770SL
SECTION 2
GENERAL This section is extracted from
instruction manual.
A
Rear
Arrière
Rückseite
Parte posterior
Achterkant
R20 (size D) ×4
R20 (D) ×4
R20 (Größe D) ×4
R20 (tamaño D) ×4
R20 (D) ×4
Insert Eside of the battery first.
Insérez la borne Ede la pile en premier.
Legen Sie die Batterien mit dem Minuspol
Ezuerst ein.
Inserte primero el lado Ede la pila.
Breng de Ekant van de batterij eerst in.
B
To AC IN
Vers AC IN
An AC IN
A AC IN
Naar AC IN
To a wall outlet
Vers une prise murale
An eine Netzsteckdose
A la toma de pared
Naar een stopcontact
AC power cord
Cordon d’alimentation secteur
Netzkabel
Cable de alimentación de CA
Netsnoer
HOLD OPERATION
LIGHT
mb/CLOCK TIME SET ON/OFF SLEEP
SCAN
STANDBY
TUNE/
TIME
SET
VOL
TONE
BAND 1234567
PRESET TUNING
STATION SELECT/ PRESET
vjack
Prise v
Buchse v
Toma v
vaansluiting
Telescopic Antenna
Antenne télescopique
Teleskopantenne
Antena telescópica
Telescoopantenne
TUNE/TIME SET
VOL
TONE
CFM SW MW/LW
CLOCK for ICF-M770L
CLOCK pour ICF-M770L
CLOCK beim ICF-M770L
CLOCK para ICF-M770L
CLOCK voor ICF-M770L
*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.
*
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 ICF-
M770L) 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 or , the time digits
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.

ICF-M770L/M770S/M770SL
4
• This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
SECTION 3
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
3-2. CABINET (REAR) ASSY
3 telescopic antenna (ANT1)
2 screw (P3 × 10)
1 six screws
(BTP3
× 14
)
6 cabinet (rear) assy
5 Remove five solders.
4
main board
main board
SET
3-2. CABINET (REAR) ASSY
(page 4)
3-4. MAIN BOARD
(page 5)
3-3. CHASSIS ASSY
(page 5)

ICF-M770L/M770S/M770SL
5
3-3. CHASSIS ASSY
3-4. MAIN BOARD
4 chassis assy
1 knob (jog)
2 knob (control) (vol
)
3 knob (control) (tone)
5 main board
4 three claws
4 claw
2 claw
3 key board
1 two screws
(P2
× 8)

6
ICF-M770L/M770S/M770SL
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 Digital 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 VOLTAGE ADJUSTMENT
Adjustment Part Frequency Display Reading on Digital 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 Digital 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
SW VT VOLTAGE ADJUSTMENT*
Adjustment Part Frequency Display Reading on Digital 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)
0 dB=1 µV
[MW/LW]
Setting:
BAND switch: MW or LW
[FM]
Setting:
BAND switch: FM
[SW] (ICF-M770S/M770SL)
Setting:
BAND switch: SW
•Repeat the procedures in each adjustment several times, and the
tracking adjustments should be finally done by the trimmer ca-
pacitors.
•Remove FM/SW antenna in FM/SW adjustment.
digital voltmeter
100 kΩ
MAIN board
TP (VT) +
–
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level: as low as possible
+
–
level meter
set
32 Ω
11 pF
MAIN board
TP (ANT)
JACK board
vjack (J201)
FM RF signal
generator
22.5 kHz frequency
deviation by 400 Hz
signal
Output level: as low as possible
+
–
level meter
set
32 Ω
0.01 µF
MAIN board
TP (ANT)
JACK board
vjack (J201)
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.
+
–
level meter
set
32 Ω
JACK board
vjack (J201)
SECTION 4
ELECTRICAL ADJUSTMENTS

ICF-M770L/M770S/M770SL
77
Adjustment Location:
– MAIN BOARD (Component Side) –
– MAIN BOARD (Conductor Side) –
TP
(VT)
TP
(ANT)
CT1 MW Tracking Adjustment (M770L)
L5-1
L13
L12 FM Tracking Adjustment
CT4
CT2 MW Tracking Adjustment (M770S)
L5 LW Tracking Adjustment (M770SL)
CT1 SW Tracking Adjustment (M770S/M770SL)
L3
T1
AM IF
Adjustment
L14
FM VT Voltage
Adjustment
CT3
LW VT Voltage
Adjustment (M770L) L8 MW VT Voltage Adjustment (M770L)
SW VT Voltage Adjustment (M770S/M770SL)
L10 MW VT Voltage Adjustment (M770S)
LW VT Voltage Adjustment (M770SL)
CT2 LW Tracking Adjustment (M770L)
L5-2

ICF-M770L/M770S/M770SL
88
SECTION 5
DIAGRAMS
5-1. BLOCK DIAGRAM
13
10
15 18
11
6 8
FM
FRONT-END
FM
IF AMP
AF
POWER AMP
AM IF AMP,
AGC, DET
AM
FRONT-END 17
20
FM
RF IN
FM/AM
IF OUT
CF3
10.7MHz
CF2
10.7MHz
CF1
450kHz
FM
RF
FM
IF IN
TUNING METER
28
AF
OUT
AF
IN
24 25
DET
OUT
AM
IF IN
METER
NF VOL
16 4 5
FM/AM
BAND
SELECT
AM OSC
L8
SW/MW
OSC
L10
MW/LW
OSC
L14
FM OSC
L5
MW/LW
FERRITE-ROD
ANTENNA
FM OSC
AM
RF IN
L12, 13
FM RF
FM/AM FRONT-END,
FM/AM IF AMP, DET, AGC, AF AMP
IC1
SYSTEM CONTROLLER,
LIQUID CRYSTAL DISPLAY DRIVER,
KEY CONTROL
IC104
CT2
D2-1
Q6
MW/LW
SWITCH
MW/LW
SWITCH
Q4
MW/LW
SWITCH
Q7
CT3
CT4
RV1
VOL
+
+
L14
FM VT VOLTAGE
D104, 105
(LCD BACK LIGHT)
CT3
LW VT
VOLTAGE
L10
LW VT
VOLTAGE
CT4, L12, 13
FM TRACKING
T1
AM IFT
T1
AM IF
B.P.F.
BPF1
LOW-PASS FILTER
Q104, 110
• SIGNAL PATH
: FM
: MW/LW
D1-1
D6
D7
LIGHT
16
BEEP 52
15
AM/(FM/TV)
56
EO
19
(MW/LW)/SW
4
BPF
3
MUTE 2
AC DET
TUNED
14
VCOL
20
VCOH
25 24
X101
75kHz
XIN XOUT
17
HOLD LCD0 – LCD12
21
COM0 – COM3
KEY MATRIX
S101 – 119
35 – 47 31 – 34
KS0 – KS4
1, 6 – 9
KR0 – KR3
10 – 13
LIQUID CRYSTAL DISPLAY
LCD101
(M770L)
CT2, L5-2
LW TRACKING
(M770L)
CT1, L5-1
MW TRACKING
(M770SL)
CT2, L5
LW TRACKING
(M770S)
CT2, L5
MW TRACKING
CT1
Q11, 12
TONE
CONTROL
SWITCH
D1-2
(M770L)
ANT1
FM/SW
ANTENNA
CF4
10.7MHz
3FM
DISCRIMINATOR
FM
DISCRI
SP1
J201
v
MUTING
SWITCH
Q9
LED DRIVE
Q107
D9
FM/(SW/MW/LW) BAND
SELECT SWITCH
Q10
FM VCO
BUFFER
Q8
FM VCO
BUFFER
Q105
M770S/
M770SL
M770S/
M770SL
SW
SWITCH
Q1
L3
SW
RF
FM/(SW/MW/LW) BAND
SELECT SWITCH
Q5
VCC B+
D2-2
SW
SWITCH
Q4
SW BAND
SELECT SWITCH
Q3
(M770L)
M770S/
M770SL
M770S/
M770SL
S120
HOLD
OFF
+3V B+
HOLD
T202
POWER
TRANSFORMER
RECT
D205, 206
J301
AC IN -
AC DETECT
Q201
AC DETECT
Q103
DRY BATTERY
SIZE "D"
(IEC DESIGNATION R20)
4PCS. 6V
D202 – 204
5
POWER
D201
VCC B+
+3V B+
B+ SWITCH
Q109
+3V
REGULATOR
IC101
DC/DC
CONVERTER
Q106, 111, T101
LOW-PASS
FILTER
CIRCUIT
B+ D102
RV2
TONE
REG OUT
9
REG +1.2V
50
VDET1
51
CEDET
BATTERY
VOLTAGE DETECT
IC102
53
VDET2
BATTERY
VOLTAGE DETECT
IC103
B+ SWITCH
Q101
POWER ON/OFF
CONTROL SWITCH
Q102
FM/(SW/MW/LW) BAND
SELECT SWITCH
Q108
(M770L)
L5-1
MW
FERRITE-ROD
ANTENNA
L5-2
LW
FERRITE-ROD
ANTENNA
REG
+1.2V
REG
+1.2V
REG
+1.2V
Q2
SW
SWITCH
VCC B+
(M770L)
M770S/
M770SL
M770S/
M770SL
M770S/
M770SL
CT1, L3
LW TRACKING
(M770SL)
L10
MW VT
VOLTAGE
(M770S)
L8
SW VT
VOLTAGE
(M770S/M770SL)
L8
MW VT
VOLTAGE
(M770L)

ICF-M770L/M770S/M770SL
99
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.)
5-2. NOTE FOR PRINTED WIRING BOARD AND SCHEMATIC DIAGRAMS
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 Ωand 1/4W or less unless otherwise
specified.
•f: internal component.
•C: panel designation.
•IC Block Diagram
IC1 CXA1019S
12 3 45 6 7 8 9 10 15141312
11
FM
DISCRIMINATOR
AF POWER AMP AM FE FM IF
TUNING
METER
AM IF DET AGC
FM FE
23 22 21 202425 19 18 17 1629 28 27 2630
GND GND AF OUT VCC RIPPLE FILTER AF IN DET OUT AFC AGC AFC AGC IF GND METER N.C FM IF IN AM IF IN FM/AM BAND SELECT
FM/AM
IF OUT
FE GND
N.C
AM RF IN
FM RF
REG OUT
FM OSC
FM RF IN
AFC
AM OSC
VOL
NF
FM DISCRI
GND GND
•A: B+ Line.
•H: adjustment for repair.
•Power voltage is dc 6V 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
•Voltagesare taken with aVOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
•Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
•Circled numbers refer to waveforms.
•Signal path.
F: FM
f: MW/LW
Note: The components identified by mark 0or dotted line
with mark 0are critical for safety.
Replace only with part number specified.
•Circuit Boards Location
jack board
main boar
d
key board
inlet board
power board

ICF-M770L/M770S/M770SL
1010
A
K/A
K
D5
K
A
K
D9
ECB
Q12
ECB
Q11
C55
C63
R30
C45
C57
ECB
Q10
C38
C37
R28
R29
C34
C43
C52
C32
C58
R19
C28
C27
D7
KA
C61
R21
C29
R18
C25
C24
D6
KA
R17
JC7
R22
R27
JC15
R15
R20
C50
C36
C65
ECB
Q8
Q2
BCE
R34
C3
R3
R7
ECB
Q5 D8
AK
R5
C1
R10
C4
Q1
GDS
R1 R2
C5 C6
C10 C7
JC14
JC13
C12
C20
1A
K
2A
D1
C15
R11
R13
R12
JC8JC1
JC3
ECB
Q4
JC11
C56
R31
C66
C64
JC10
ECB
Q7
R25
R16
C67
C40
Q9
BCE
R23
R24
C44
C46
C47
C30
C19
C21 C22
1A K
2A
D2
R8
R14
C23
C11
C18
ECB
Q3
R9
JW1
C54
+
1
5
JW2
L6
C48
+
C42
+
C51
+
C41
+
CF1
CF4
C35
+
L14
JW5
JW4
CT4
L13
L12
BPF1
L16
L1
C8
+
C33
+
L15
JW16
L2
JW17
JW12
JW18 CT1
L7
L3
JW15
JW14
JW13
CT2
L10
RV1
JW20
JW19
JW21
L8
L9
L11
JW22
JW6
JW9
JW7
115
JW11
JW8
C62
+
JW3
T1
CF3
CF2
IC1
MAIN BOARD
(11)
11
1-684-571-
15
1
16
30
R33
R32
JC5
(M770L)
JC6
(M770L)
R6
ECB
Q6
C13
C73
(M770L)
(M770L) (M770S/M770SL)
C59
(M770L)
(M770SL)
M770S/
M770SL
M770S/
M770SL
M770S/
M770SL
VOL
RV2
TONE
JW10
JC4
JC2
C2
C17
C14C16 (M770L)
CT3
M770S/
M770SL
M770S/
M770SL
(M770L)
A
KEY
BOARD
TP
(VT)
1
2
3
(M770S/M770SL)
TP
(ANT)
ANT1
L5
MW/LW FERRITE-ROD
ANTENNA
A
B
C
D
E
F
G
H
I
1 2 3 4 5 6 7 8 9 10
I
14
INLET BOARD
(11)
11
1-684-567-
D201
AK
D202
AK
D203
AK
D204
A
R202
C207
R201 R203
C206 C205
C202
Q201
1
5
C204
+
13
D206 D205
C203
+
14
J201
JACK BOARD
(11)
11
1-684-568-
T202
POWER
TRANSFORMER
POWER BOARD
(11)
11
1-684-569-
K
v
SP1
DRY BATTERY
SIZE "D"
(IEC DESIGNATION R20)
4PCS. 6V
13
J301
~ AC IN
11 12 13 14 15
L5-2
LW FERRITE-ROD
ANTENNA
L5-1
MW FERRITE-ROD
ANTENNA
(M770L)
(M770S/M770SL)
5-3. PRINTED WIRING BOARDS – MAIN/JACK/POWER/INLET Boards – • See page 9 for Circuit Boards 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
IC1 D-7
•Semiconductor Location
Ref. No. Location Ref. No. Location
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
(Page 12)

ICF-M770L/M770S/M770SL
1111
R29
C52
R33
Q11
Q12
C55
JW2
C46
C47
C45
C48
R32
D9
C57
C41 C42
C43
CF1
C38
JW3
R28C37
C36
JW4
JC15
C33
C32
C58
C35
R27
JW6 JW10JC7
R17
C24
D6
C25
JW16 JW21
C56
C64
C40
C62
R25
R23 R24C44
R21
C28
C27
D7
R18
C66
R31
JW22
BPF1
C1
R20
JW5
JW19 JC11
JW7JW8
L16 R7
JC10
R14 C59
JC13
JC14
C10
R3L1
L2 R1 C4 R2 C5
C3
Q1
R34
Q2
JW17
R13
L9
R11
C63
RV2
Q8
R22
C29
JW15
L6
C30
C54
R8
JW13
C50C7
JW20
R15
R202
R203
C204
C202
C207
R201
D201
D202 D203 D204
C205
D205
D206
C206
R30
C8
JW11
C51
IC1
CF2
CF3
Q10
T1
C61
CF4
Q9
RV1L12
L13
L14
L3
JW18
JC5
R6
D1(1/2)
JW1
C11
D5
D8
R5
JW14
L15R10
C6
C12
C73
JW12
Q3
Q6
R12
C21
C22
C20
C67
JC3
JC2
JC4
JC8
JC1
Q5
C19
C16
L8
R16 L11
R9
Q4
J301
J201
Q201
T202
C203
R19
Q7
C18
L10
CT3 C2C17
C14
C15
D1(2/2)
C65
C34
D2(1/2)
D2(2/2)
ANT1
TP
TP
JW9
C13
SP1
CT1
CT2
JC6
C23
L5
L7
CT4
330
2.2
47k
2SC4081
2SC4081
0.022
0.01
0.047
0.22
22
25V
4.7k
DAN202U
0.01
4.7
50V
4.7
50V
0.022
450KHz
0.01
2.2k100p
0.1
22
10V
0.22
100p
4.7
25V
47
100k
1000p
HVU202A
5p
47p
100p
0.01
220
10V
47k
1k 4.7k0.01
22k
10p
1000p
HVU202A
100k
0.022
100
0.01
1k
2.2k
1M 10p
15p
4.7k
4.7k 5p 100 0.01
1000p
2SK238
470
DTA144TUA
1M
1M
100p
10k
2SC4098
330
2p
0.01
1000
10V
10k
0.010.01
10k
47
2.2k
2200
16V
100p
0.022
100
1SS355
1SS355 1SS355 1SS355
0.01
1N4002
1N4002
0.01
1k
100
10V
470
16V
CXA1019S
10.7MHz
10.7MHz
DTC144TUA
0.01
10.7MHz
2SA1576A
50k
4.7k
SVC347
100p
1PS226
1SS356
1k
1k
5p
47p
2p
DTC144TUA
2SC4081
0.022
0.022
DTC144TUA
22k
100k
2SC2001
220
16V
3.3k
2SA1576A
0.01
50p 47p330p
68p
SVC347
100p
0.01
SVC347
SVC347
(ANT)
(VT)
470p
10p
33p
10p
∗
∗
∗
∗
∗
∗
∗
∗
8
FM OSC
RF GND
7
9
AM OSC
10
AC DETEC
6
VT
SCAN TUNE
5
11
BEEP
12
GND
14
15
13
UCOM DC
6V COM
VCC
4
LW=L MW=L SW=H
3
FM=H SW.MW.LW=L
2
MUTE
1
UCOM DC
6V COM
AC DETEC
SP
GND
G
OI
4
5
3
1
2
FM/AM
IF OUT
FE
GND
FM
RF IN
NC
AM
RF IN
FM
RF
REG
OUT
FM
OSC
AFC
AM
OSC
VOL
NF
FM
DISCRI
GND
GND
GND
GND
AF
OUT
VCC
RIPPLE
FILTER
AF
IN
DET
OUT
AFC
AGC
IF
GND
AFC
AGC
METER
NC
FM
IF IN
IF IN
AM
FM/AM
BAND
SELECT
4
5
3
1
2
1
3
2
4
3
2
1
3
2
1
1
3
2
4
BATT DC
6V COM
AC DETEC
BATT -
BATT +
FM/AM FRONT-END
AGC,AF AMP
FM/AM IF AMP,DET,
TONE
Q11,12
SWITCH
AM IFT
BAND SELECT
SWITCH
BUFFER
FM VCO
MUTING
SWITCH
VOL
FM
RF
FM
RF
FM
OSC
SW RF
S
SW
SWITCH
L5-2
L5-1
FERRITE-ROD
ANTENNA
FERRITE-ROD
ANTENNA
MW
L5-1
L5-2
SELECT SWITCH
MW/LW OSC
MW/LW
SWITCH
MW/LW
SWITCH
SELECT SWITCH
FM/(SW/MW/LW)BAND
∗
C15
390p
6800p
(M770L)
∗
(M770L)
C16
15p
5p
SW/MW OSC
SW SWITCH
∗
(M770L)
R12
10k
3.3k
∗ C21
390p
100p
(M770S)
(M770SL)
∗
(M770S)
(M770SL)
C22
68p
330p
(M770L)
(M770L)
(M770L)
(M770SL)
(M770L)
(M770L)
(M770L)
(M770L)
(M770L)
(M770S)
(M770L)
(M770S) (M770SL) (M770L) (M770L)
∗
(M770L)
Q4
2SC4098
2SC4555
(M770L)MW/LW SWITCH
SW SWITCH
∗
Q4
∗
15p
C19
(M770S)
(M770SL)
POWER
TRANSFORMER
DRY BATTERY
SIZE"D"
(IEC DESIGNATION R20)
4PCS. 6V
DETECT
AC
SW.MW.LW=H
BAND FM=L
(M770S/M770SL)
ANTENNA
FM/SW
(M770L/M770SL)
(M770S/M770SL)
(M770S/M770SL)
(M770S/M770SL)
(M770S/M770SL)
SW BAND
330p
(M770S/M770SL)
(M770S/M770SL)
(M770S/M770SL)
(M770S/M770SL)
(M770S/M770SL)
(M770S/M770SL)
(M770S/M770SL)
(M770S/M770SL)
TONE CONTROL
(M770S/M770SL)
FM/(SW/MW/LW)
∗
(M770S)
CT2
10p
50p (M770L/M770SL) (M770L)
LW
FERRITE-ROD
ANTENNA
MW/LW
(M770SL)
10µH
22µH
220µH
47µH
47µH
220µH
47µH
38µH
~AC IN
5-4. SCHEMATIC DIAGRAM – MAIN/JACK/POWER/INLET Boards – • See page 9 for IC Block Diagram.
The components identified by mark 0or dotted
line with mark 0are critical for safety.
Replaceonlywithpart number specified.
(Page 13)

ICF-M770L/M770S/M770SL
1212
ECB
Q111
R157
R159
C147
C143
C144
R156
ECB
Q106
R158 R153
C145
D103
KA
R177
C104
Q109
BCE
R105
D101
AK
C106 R104
Q102
BCE
Q101
BCE
R103
C140
Q108
BCE
R109
C141
JC107
JC105
R102
R163 R162
R179 R197
R198
R178 R199
R101
C152
Q103
BCE
R136
R174
C115
R137
R164 C118
Q110
BCE
R152
Q104
BCE
R139
C117
C116
R142 R143
C150
R108
R138
R160
R134 R118
R135
R140
C148
R151 R150
Q105
BCE
C142
C132
C133
R141
JC103 C135
C134
C128
R144
C136
C149
R148 R154
Q107
BCE
R149 R155
C138 C137
C139
R196
R195
R194
R193 R192
R191
R190
R189 R188
R187 R186 R185
R184 R183
R182
R181 R180
R111 R107
C108
R161
R120
D106
KA
C113 R121
R124
R122
R123
R125 R126 R127 R128 R129 R130 R131 R133 R132
C124 C123 C122
C121
C130
R169
R171
R170
C109
R168
R175
R172 R167
R113
R147
JC106
R110
R106
R166
R165
R176 R173
AK
D102
IC101
IC103
IC102
IC104
S101
S102
S103S104S105
S107
S108
D105
D104
JW131
S114
JW127
JW128
JW130
JW129
S115
L102
C129
+
C146
+
T101
S111
L103
C151
+
C105
+
S113
15
1
JW119
JW120
JW115
JW114
JW113
JW121
JW122
JW123
JW124
JW125
JW126
JW132
JW133
JW134
L101
JW111
JW112
JW109
JW110
JW108
JW107
JW106
JW105
S117
S119
S118
S116
JW117
JW116
S109
S120
JW103
JW102
JW101
JW104
S106
JW135
LCD101
LIQUID CRYSTAL DISPLAY
KEY BOARD
(11)
11
1-684-570-
54
13
AMAIN
BOARD
TIME SETON/OFF
S110
SLEEP
STANDBY
LIGHT
S112
SCAN
1
14 15
28
29
42
43
56
43
12
R116 R117
R114 R115
M770S/
M770SL
M770L/
M770S
(M770SL)
(M770L)
1 17
TUNE/
TIME
SET
6
OPERATION
7
5432
1BAND
PRESET TUNING
STATION SELECT/ PRESET
D104, 105
(LCD BACK LIGHT)
T101
43
12
HOLD
HOLD OFF
A
B
C
D
E
F
G
H
I
1 2 3 4 5 6 7 8
R112
X101
CLOCK
mb/CLOCK (M770S/M770SL)
(M770L)
5-5. PRINTED WIRING BOARD – KEY Board – • See page 9 for Circuit Boards 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
•Semiconductor
Location
Ref. No. Location
(Page 10)

ICF-M770L/M770S/M770SL
1313
5-6. SCHEMATIC DIAGRAM – KEY Board – • See page 14 for Waveforms.
LCD101
R120
R121
R122
R123
R124
R125
R126
R127
R128
R129
R130
R131
R132
R133
C121
C122
C123
C124
C130
C134
C135
C136
C137
R144
JW133
JW134
C138 C139
R180
R181
R182
R183
R184
R185
R186
R187
R188
R189
R190
R191
R192
R193
R194
R195
R196
C141
C115
Q103
Q106 Q111
C151
L103
C140 C143
R157
R158 C145
R159
C146 C147
R153
L102
R177
JW130
C148
JW124
JW125
C152
D104 D105
R148 R149R154 R155 JW131
C142
C116 R139
R101R102
C129 R136 R137
R152
JW129
R135
JW126
R151
S105 S104
S108
S116 S117
S118
S119
S106S107
S103
JW110
R170
R138
D106
JW108
R171
R169
R176
R166
JW115
R163
JW128
JW127
JW104
JW119 JW116
R109C113
R103 R104
C109C108
R110
R111
R106 R107
JW105
JW135
R118
IC103IC102
JC106
D101R105
JC103
JW132
R160
R150R108
JW123 JC105 JC107
D102
R168 JW103 JW106
JW107JW102
JW111
JW113
R113
R161
R165
R167
JW109
R162
JW114
R147
JW101
JW112
R175
R164
R174R173
R156
JW120
C106
C105
C104
R198
R197
R178
R179
R172
R199
R134
JW117
Q108 Q105
C144
T101
Q110 Q104
L101
X101
Q107
C149
D103
R116 R117R114R115
R112
S120
IC101
Q109
Q101
Q102
S114
S109
S102
S101
S110
S112 S113
S115
R142
R140R143
C117
C118
C132
C150
JW122
R141
C133
C128
IC104
S111
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
470p
470p
470p
470p
470p
27p
22p
0.1
0.1
10k
0.01 0.1
100k
100k
100k
100k
100k
100k
100k
100k
100k
100k
100k
100k
100k
100k
100k
100k
100k
0.01
0.0047
DTC144EUA
2SC4081 2SC4081
10
16V
100p 0.22
100k
100k 0.1
47k
10
10V 0.1
22
10k
0.01
0.022
TOL-31CSGAKAA
-KS01
TOL-31CSGAKAA
-KS01
680 680680 680
1000p
0.33 10k
100k1k
1000
6.3V 1M 4.7k
47k
10k
470
10k
10
1SS355
10k
10k
10k
10k
10k
47k0.1
1k 4.7k
0.10.1
100k
100k
1M 1M
1k
S-80842ANNPS-80836ANNP
1SS3551k
100
47k47
1SS355
10k
10k
10k
10k
10k
10k
10k
10k
10k
10k10k
1k
100p10 16V0.01
1k
1k
1k
1k
10k
1k
10k
DTC144TUA 2SC4098
10p
2SC4081 2SC4081
3.3mH
75KHz
2SC4081
1
UDZ-TE17-13
100k 100k100k100k
4.7k
S-81230SG-QB-T1
2SA1576A
2SB970
DTC144TUA
10k
100k2.2k
1000p
470p
100p
47p
0.1
1
-036-1A7
COM0
COM1
COM2
COM3
LCD0
LCD1
LCD2
LCD3
LCD4
LCD5
LCD6
LCD7
COM0
COM1
COM2
COM3
LCD0
LCD1
LCD2
LCD3
LCD4
LCD5
LCD6
LCD7
KS0
POWER
KS1
KS2
KS3
KS4
KR0
KR1
KR2
KR3
GND
EO
REG0
VDD
REG1
INITIAL2
INITIAL1
VDET2
BEEP
CEDET
LCD14
LCD13
LCD12
LCD11
LCD10
LCD9
LCD8
LCD7
LCD6
LCD5
LCD4
LCD3
LCD2
LCD1
LCD0
COM3
COM2
COM1
COM0
LIQUID CRYSTAL DISPLAY
8
FM OSC
RF GND
7
9
AM OSC
10
AC DETEC
6
VT
SCAN TUNE
5
11
BEEP
12
GND
14
15
13
UCOM DC
6V COM
VCC
4
LW=L MW=L SW=H
3
FM=H SW.MW.LW=L
2
MUTE
1
GND
OUT
IN
SW.MW.LW=H
BAND FM=L
SELECT SWITCH
FM/(SW/MW/LW)BAND FM VCO
BUFFER
AC
DETECT
DC/DC
CONVERTER
Q104,110
LOW-PASS
FILTER
10k
4.7k
(M770L)
AC DET
TUNE
LIGHT HOLD
VCOL
VCOH
XOUT
XIN
REGLCD0
CAPLCD0
CAPLCD1
REGLCD1
SYSTEM CONTROLLER,
LIQUID CRYSTAL
LED DRIVE
(LCD BACK LIGHT)
D104,105
DC/DC
CONVERTER
Q106,111
BPF
MUTE
AM/
(FM/TV)
VDET1
(M770L)
(M770SL)
HOLD
OFF
HOLD
GND NC
OUT IN
VOLTAGE
DETECT
VOLTAGE
DETECT
GND NC
OUT IN
NCNC
+3V REGULATOR
B+ SWITCH
B+ SWITCH
CONTROL SWITCH
POWER ON/OFF
OPERATION
LIGHT
5 4 3 2 17 6
BAND
S108 S102S103S104S106 S105S107
mb/CLOCK SLEEP
SCAN STANDBY
ON/OFF
STANDBY
TIME SET
S116S117S118S119
TUNE/
TIME SET
(M770S/M770SL)
(M770L/M770S)
(MW/LW)/SW
DISPLAY DRIVER,
KEY CONTROL
STATION SELECT/ PRESET
PRESET TUNING
(M770S/M770SL)
CLOCK (M770L)
(M770S/M770SL)
µPD17072GB
100µH
220µH
(Page 11)

ICF-M770L/M770S/M770SL
1414
•Waveforms
– KEY Board –
1Q106 (Base), Q111 (Collector)
3IC104 wf (XOUT)
250 mVp-
p
380 ns
5.6 Vp-p
380 ns
1.7 Vp-
p
13.3 µs
5-7. IC PIN FUNCTION DESCRIPTION
2Q106 (Collector)
•KEY BOARD IC104 µPD17027GB-036-1A7
Pin No. Pin Name I/O Description
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 GND — Ground terminal
19 EO O PLL frequency synthesizer charge pump output
20 VCOL I SW/MW/LW VCO input terminal
21 VCOH I FM VCO input terminal
22 REG0 O Voltage regulator output terminal for the PLL
23 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 Common drive signal output to the liquid crystal display
35 to 47 LCD0 to LCD12 O Segment drive signal output to the liquid crystal display
48, 49 LCD13, LCD14 O 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 INITIAL2 I Model setting input terminal “L”: ICF-M770L/M770S, “H”: ICF-M770SL
56 AM/(FM/TV) O Band selection signal output “L”: FM, “H”: SW/MW/LW
(SYSTEM CONTROLLER, LIQUID CRYSTAL DISPLAY DRIVER, KEY CONTROL)

15
ICF-M770L/M770S/M770SL
6-1. CABINET (FRONT) SECTION
SECTION 6
EXPLODED VIEWS
•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 elec-
trical parts list.
•When “NET, SPEAKER (Ref. 3)” is being
replaced, “EMBLEM (5-A), SONY (Ref. 5)”
needs to be replaced also.
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
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
13-237-047-01 PANEL (M770SL)
13-237-047-11 PANEL (M770S)
13-237-047-21 PANEL (M770L)
23-237-052-01 PLATE, TRANSPARENT
33-237-061-01 NET, SPEAKER
43-237-057-01 KNOB (HOLD)
54-925-334-41 EMBLEM (5-A), SONY
63-237-062-01 SHEET, SPEAKER
73-237-048-01 BUTTON (PRESET)
83-014-055-01 FOOT, RUBBER
93-013-190-01 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)
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
8
9
10
11
12
13
1
4
2
3
5
6
7
8
#2
#3
#3
#1
cabinet (rear) section
chassis section
SP1
The components identified by
mark 0or dotted line with mark
0are critical for safety.
Replace only with part number
specified.

16
ICF-M770L/M770S/M770SL
6-2. CABINET (REAR) SECTION
Ref. No. Part No. Description Remark 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
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
0T202 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
51
52
53
54
65
55
63 64
64
61
62
60
58
59
59
58
56
57
not
supplied
#6
#4
#6
#5
#5
#6
not
supplied
ANT1
T202
The components identified by mark 0or dotted
line with mark 0are critical for safety.
Replace only with part number specified.

17
ICF-M770L/M770S/M770SL
6-3. CHASSIS SECTION
Ref. No. Part No. Description Remark 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)
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
101
102
107
108
103
106
not
supplied
key board
main board
LCD101
#1
not
supplied
L5
104
109
105

18
ICF-M770L/M770S/M770SL SECTION 7
ELECTRICAL PARTS LIST
INLET JACK KEY
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
*1-684-567-11 INLET BOARD
***********
< JACK >
0J301 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
**************************************************************
NOTE:
•Due to standardization, replacements in the
parts list may be different from the parts speci-
fied 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
•Items marked “*” are not stocked since they
are seldom required for routine service.
Some delay should be anticipated when order-
ing 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)
********************
*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
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
The components identified by
mark 0or dotted line with mark
0are critical for safety.
Replace only with part number
specified.
When indicating parts by reference
number, please include the board.

Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
19
ICF-M770L/M770S/M770SL
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 >
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
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)
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
KEY

Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
20
ICF-M770L/M770S/M770SL
KEY MAIN
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 >
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 )
S118 1-786-267-21 SWITCH, TACT (TUNE/TIME SET U)
S119 1-786-267-21 SWITCH, TACT (TUNE/TIME SET u)
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)
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
U
U
u
u