Sony ICF-M350V Service Manual ▷ View online
ICF-M350V
R10
R8
C24
C9
C15
C22
C1
C21
L55
C10
C2
C23
R1
R51
R53
R55
C57
C14
R64
C58
C5
C4
C12
C11
R4
R3
C16
C52
R52
R54
R56
C59
R61
C54
R62
C56
R60
C25
R9
R11
R6
C13
R2
R7
C18
E C B
Q3
JC15
JC6
JC5
JC4
JC7
JC10
JC2
JC1
JC18
JC17
JC3
JC13
JC8
JC11
JC14
JC9
JC12
L3
JC16
Q2
B C E
IC51
Q55
B C E
Q56
B C E
Q54
B C E
D52
A K A
IC53
E C B
Q1
IC52
D2
A K A
R63
L56
L54
L51
L53
L52
C51
C19
+
C17
C3
+
+
+
C8
+
C6
C7
+
C20
+
+
C53
+
C55
+
CN2
CN1
IC1
1
15
16
30
J51
J52
L2
L4
RV1
1
4
5
10
CT1
CF2
CF1
T1
MAIN BOARD
VOL
CF4
TP14
(DET OUT)
TP2 (GND)
1
1
3
3
2
2
TP13
(AM VT)
6
1
1
7
L1
AM FERRITE-ROD
ANTENNA
TP (SP+)
TP (SP–)
SP51
(SPEAKER)
WHT/RED
WHT
C60
(EARPHONE)
–
+
DC IN 4.5V
1-676-196-
(11)
11
v
R132
R140
R143
C122
C132
R129
R208
R131
R215
R222
R223
R224
R225
C224
C232
C233
C108
C113
C219
C217
C218
R217
C210
C226
R213
R226
C214
L204
L101
R201
F103
F101
F104
F102
C129
C116
C134
C114
C109
C128
C216
C225
C215
R214
R218
R142
R207
C112
C117
C107
R128
C119
C136
IC102
C206
C115
L205
D205
K
A
D104
D101
A
K
A
K
Q202
B
C
E
D206
A K A
E C B
Q201
Q205
B C E
Q206
B C E
C118
C127
KEY BOARD
(COMPONENT SIDE)
1
3
2
+
+
+
+
TP204
(FM IF)
TP118
(FM VT)
TP119 (GND)
TP202
(FM/TV IN)
TP201
(GND)
(GND)
1-676-197-
(11)
11
R227
R106
R105
R104
R103
R102
R101
R113
R115
R116
R118
R119
R121
R122
R124
R127
R126
R125
R220
R211
R210
R209
R212
C223
C209
C205
C220
C231
C204
C208
R219
R148
R145
R120
R109
R107
R108
C211
C133
C104
C103
C230
C135
C101
C213
C203
C229
L206
R138
R133
R147
C110
C102
C140
C137
C123
F107
F106
F105
R139
R144
R150
R135
C120
R134
C121
L102
C131
R151
R146
C124
C126
C125
C130
R141
R136
R130
R152
C105
C106
R117
R112
R114
R111
R110
R123
C111
C207
C212
R137
IC101
14
15
28
29
42
43
56
1
IC201
1
8
9
16
D204
A K A
CT202
CT201
L203
L202
T201
Q105
B
C
E
Q102
B
C
E
Q203
Q204
B
C
E
Q106
B
C
E
Q103
B
C
E
B
C
E
D G S
Q104
D G S
Q101
D106
A
K
D105
A
K
D203
A
K
D103
A
K
E C B
Q107
KEY BOARD
(CONDUCTOR SIDE)
1
17
1
5
BPF201
LCD101
LIQUID CRYSTAL DISPLAY
S106
S110
POWER
KEY PROTECT
S112
TUNE/TIME
+
S101
CLOCK/ENTER
TIME SET
ALARM
BAND/STANDBY
S104
S109
TUNE/TIME
–
S107
S103
5
S111
4
S108
3
S102
1
S105
2
1
7
CN101
6
1
CN102
T101
(SHIELD SHEET)
S102,103,105,108,114
PRESET TUNING
1-676-197-
(11)
11
C234
C201
C139
CF201
X101
1
2
3
4
5
6
7
8
9
10
11
12
13
14
A
B
C
D
E
F
G
H
I
J
K
L
05
ANT1
FM/TV
TELESCOPIC
ANTENNA
DRY BATTERY SIZE “AA”
(IEC DESIGNATION R6)
3PCS. 4.5V
2
1
2
1
WHT
C236
C142
C237
C141
RED
RED
WHT
C235
JW100
JW101
– 9 –
– 10 –
2-3.
PRINTED WIRING BOARDS
• Semiconductor
Location
Ref. No.
Location
D2
B-9
D52
E-8
D101
H-2
D103
K-13
D104
H-2
D105
L-11
D106
K-12
D203
H-10
D204
G-10
D205
I-4
D206
H-4
IC1
D-3
IC51
C-7
IC52
E-8
IC53
D-7
IC101
H-13
IC102
H-3
IC201
H-11
Q1
E-6
Q2
E-3
Q3
C-2
Q54
E-7
Q55
E-7
Q56
E-7
Q101
L-13
Q102
I-12
Q103
L-13
Q104
L-13
Q105
H-12
Q106
L-12
Q107
L-12
Q201
I-4
Q202
I-4
Q203
I-11
Q204
I-11
Q205
J-2
Q206
J-2
– 11 –
– 12 –
• Waveforms
1
IC101
ea
(XIN)
500 mV/DIV, 5 µs/DIV
1 Vp-p
13
µ
s
2
IC101
wg
(AM LOCAL IN) (Band: AM)
200 mV/DIV, 500 ns/DIV
520 mVp-p
1
µ
s
3
IC101
wh
(FM LOCAL IN) (Band: FM)
20 mV/DIV, 10 ns/DIV
65 mVp-p
10 ns
4
IC101
wj
(TV LOCAL IN) (Band: TV H)
20 mV/DIV, 10 ns/DIV
51 mVp-p
4.8 ns
5
Q106 collector
2 V/DIV, 200 ns/DIV
2 V/DIV, 200 ns/DIV
5 Vp-p
400 ns
• IC Block Diagrams
IC1
CXA1019S
IC201
TA2030FN (EL)
1
2
3
4
5
6
7
8
9
10
15
14
13
12
11
FM
DISCRIMINATOR
AF POWER AMP
AM FE
FM IF
TUNING
METER
AM IF DET AGC
FM FE
23
22
21
20
24
25
19
18 17 16
29 28 27 26
30
GND
GND
AF OUT
VCC
RIPPLE
FIL
TER
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
MIX OUT
OSC OUT
FM OSC
TV OSC
VCC
FM RF
TV RF
GND
TV IN
TV BY
RF GND
FM BY
FM IN
MODE SW
PW SW
IF OUT
16 15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
TV
OSC
BUFFER
MIX
FM RF
AMP
IF
AMP
POWER/MODE
SWITCH
TV RF
AMP
BUFFER
FM
OSC
2-4.
IC PIN FUNCTION DESCRIPTION
Pin No.
Pin Name
I/O
Description
1 to 8
LCD10 to LCD3
O
Segment drive signal output to the liquid crystal display (LCD101)
9, 10
LCD2, LCD1
O
Segment drive signal output to the liquid crystal display Not used (open)
11
—
—
Not used (open)
12 to14
COM3 to COM1
O
Common drive signal output to the liquid crystal display (LCD101)
15
VSS3
—
Ground terminal
16, 17
CAP1, CAP2
—
Terminal for doubler circuit capacitor connection to develop liquid crystal display drive voltage
18
VSS2
—
Ground terminal
19
MUTE
O
Muting on/off control signal output “L”: muting on
20
BEEP
O
Buzzer sound signal output terminal
21
NC
—
Not used (fixed at “L”)
22
VDD
—
Power supply terminal (+3V)
23
TV LOCAL IN
I
TV (7 to 13CH, weather) VCO input terminal
24
FM LOCAL IN
I
FM/TV (2 to 6CH) VCO input terminal
25
AM LOCAL IN
I
AM VCO input terminal
26
VSS (GND)
—
Ground terminal
27
PD OUT
O
PLL error output terminal
28
—
—
Not used (open)
29
CE
I
System reset signal input from the reset signal generator (IC102) “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
30
XOUT
O
System clock output terminal (75kHz)
31
XIN
I
System clock input terminal (75kHz)
32
CAP
—
Terminal for regulator circuit capacitor connection to attain stable drive voltage of the oscillator
33
—
—
Not used (open)
34
TV H
O
TV band select signal output terminal Not used (open)
35
TV L
O
TV band select signal output terminal Not used (open)
36
MW/FM. TV
I/O
Battery check signal input from battery check (IC51) and AM or FM/TV band select signal output
“L”: FM/TV, “H”: AM
“L”: FM/TV, “H”: AM
37
—
—
Not used (open)
38
RADIO POWER
ON/OFF
O
Power on/off control signal output terminal “L”: power off, “H”: power on
39
TV/MW. FM
O
FM/TV (2 to 6CH) or TV (7 to 13CH, weather) band select signal output
“L”: FM/TV (2 to 6CH), “H”: TV (7 to 13CH, weather)
“L”: FM/TV (2 to 6CH), “H”: TV (7 to 13CH, weather)
40
INIT
O
Initialize signal output to KEY RET0 (pin rk)
41
—
—
Not used (open)
42 to 44
KEY SCAN2 to
KEY SCAN0
O
Key scan signal output to the key matrix
45 to 48
KEY RET3 to
KEY RET0
I
Key return signal input from the key matrix
49, 50
—
—
Not used (fixed at “L”)
51 to 56
LCD16 to LCD11
O
Segment drive signal output to the liquid crystal display (LCD101)
•
KEY BOARD IC101 µPD1724GB-618-1A7 (SYSTEM CONTROLLER, LCD DRIVER, KEY CONTROL)
– 13 –
3.
EXPLODED VIEWS
!
: Indicates added portion.
Page
Before Change
After Change
Ref. No.
Part No.
Description
Remark
16
3-046-615-01 SHEET (ANT)
Ref. No.
Part No.
Description
Remark
13
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
5
1-501-362-11 ANTENNA, TELESCOPIC
9
4-860-518-00 CUSHION
12
3-370-475-01 SCREW (NYLOCK +B 3X6)
13
7-685-650-79 SCREW +P 3X16 TYPE2 NON-SLIT
5
1-501-222-31 ANTENNA, TELESCOPIC
12
3-918-696-11 SCREW (M 3X6 LOCK ACE)
13
7-685-150-14 SCREW +P 3X16 TYPE2 NON-SLIT
9
10
10
not supplied
#
2
2
15
^
– Continued on next page –
Ref. No.
Part No.
Description
Remark
15
3-043-508-01 CUSHION (SPEAKER)
Ref. No.
Part No.
Description
Remark
not supplied
16
not supplied
#
– 14 –
Page
Before Change
After Change
14
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
* 51
3-380-336-01 HOLDER (LCD)
* 52
A-3679-479-A DISPLAY BOARD, COMPLETE
* 55
A-3679-478-A MAIN BOARD, COMPLETE
* 51
3-043-509-01 HOLDER (LCD)
52
A-3663-452-A KEY BOARD, COMPLETE
55
A-3663-449-A MAIN BOARD, COMPLETE
56
3-045-823-01 SPACER (BPF)
57
3-043-511-01 SHIELD (LCD), SHEET
58
3-043-510-01 INSULATING SHEET
59
3-043-512-01 SHIELD (KEY), SHEET
60
3-043-507-01 SHIELD (LCD)
61
3-046-614-01 SHIELD (DD), SHEET
51
52
LCD1
57
51
60
52
58
56
59
61
LCD1
@
^
@
!
!
@
• Items marked “*” are not stocked since they are seldom required for routine service.
Some delay should be anticipated when ordering these items.
$
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