Read Sony ICF-M770L / ICF-M770S / ICF-M770SL Service Manual online
ICF-M770L/M770S/M770SL
11
11
R29
C52
R33
Q11
Q12
C55
JW2
C46
C47
C45
C48
R32
D9
C57
C41
C42
C43
CF1
C38
JW3
R28
C37
C36
JW4
JC15
C33
C32
C58
C35
R27
JW6
JW10
JC7
R17
C24
D6
C25
JW16
JW21
C56
C64
C40
C62
R25
R23
R24
C44
R21
C28
C27
D7
R18
C66
R31
JW22
BPF1
C1
R20
JW5
JW19
JC11
JW7
JW8
L16
R7
JC10
R14
C59
JC13
JC14
C10
R3
L1
L2
R1
C4
R2
C5
C3
Q1
R34
Q2
JW17
R13
L9
R11
C63
RV2
Q8
R22
C29
JW15
L6
C30
C54
R8
JW13
C50
C7
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
RV1
L12
L13
L14
L3
JW18
JC5
R6
D1(1/2)
JW1
C11
D5
D8
R5
JW14
L15
R10
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
C T 3
C2
C17
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
50V
4.7
50V
50V
0.022
450KHz
0.01
2.2k
100p
0.1
22
10V
0.22
100p
4.7
25V
25V
47
100k
1000p
HVU202A
5p
47p
100p
0.01
220
10V
10V
47k
1k
4.7k
0.01
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
0.01
0.01
10k
47
2.2k
2200
16V
100p
0.022
100
1SS355
1SS355
1SS355
1SS355
0.01
1N4002
1N4002
0.01
1k
100
10V
10V
470
16V
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
16V
3.3k
2SA1576A
0.01
50p
47p
330p
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
O
I
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
M
ETER
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)
(M
770L)
(M770SL)
(M
770L)
(M770L)
(M770L)
(M
770L)
(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
(M
770L/M
770SL)
(M770S/M770SL)
(M770S/M770SL)
(M770S/M770SL)
(M770S/M770SL)
SW BAND
330p
(M770S/M770SL)
(M770S/M770SL)
(M
770S/M
770SL)
(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
0
or dotted
line with mark
0
are critical for safety.
Replace only with part number specified.
(Page 13)
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