Read Sony ICF-C318 Service Manual online
ICF-C318
10
10
ICF-C318
MAIN BOARD
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
1
9
8
7
6
5
4
3
2
27
19
18
17
16
14
13
15
12
11
10
28
29
30
32
33
31
34
35
36
20
21
22
23
24
25
26
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
IC101
LCD DRIVE,
DIGITAL ALARM
CLOCK
1
IC1
FM/AM FRONT END,
IF DET, POWER AMP
IC B/D
W104
FM WIRE
ANTENNA
ANTENNA
L1 AM BAR-ANT
C2
3p
CJ
C3
10p
CH
C4
10p
CH
C6
6p
CH
C8
22p
CH
C21
3p
CJ
JC2
JW24
D201
RB521S-30-TE61
C10
JW21
0.01
B
C7
10
50V
BP1
CV1-1
CT1-1
CV1-2
CT1-2
CV1-3
CT1-3
CV1-4
CT1-4
JW22
L3
FM OSC
L4
AM OSC
RV1
50k
C25
0.1
F
C19
1
F
CF3
DISCRI
R10
47k
TP101
W105
COM1
TP102
COM0
R202
15k
R205
220k
R102
10k
R244
15k
R239
220k
R240
220k
R204
330k
R206
JW12
330k
R241
47k
R207
220k
R242
47k
R201 15k
R7
47
TP6
BUZ
TP5
MUTE
Q1
2SA1235TP-1EF
MUTE
TP3
TP4
REG
TP2
RF GND
FM/AM
IF OUT
BAND
SELECT
AM
IF IN
FM
IF IN
NC
NC
LED
GND
AF
OUT
VCC
RIPPLE
FIL
TER
AF IN
DET
OUT
AFC
AGC
AFC
AGC
IF GND
FE
GND
FM
RF IN
AM
RF IN
REG
OUT
FM
OSC
AM
OSC
FM
DISCRI
NC
NF
GND
GND
AFC
VOL
FM RF
TP1
RF IN
TP9
BAND
BAND
T1
AM IFT
CF1
455kHz
CF2
10.7MHz
TP8
DET
DET
TP7
DCC
DCC
R101
1k
TP10
JW19
JW11
JW27
JW8
JW17
JC202
JW20
GND
JW15
S101
ALARM
VOLUME
JW16
C13
0.022
B
C24
1000
10V
C9
4.7
4.7
C20
1
F
F
C22
1
F
F
C210
0.01
B
C15
0.1
F
50V
C17
47
10V
C11
10
50V
C1
0.01
B
W103
C&SA
AUS, SP, AR
TP11
C301
0.01
R302
4.7k
D301
JW4
JW5
TP301
TP304
1SS133T-77
D302
IN4002-B5
B
D303
Q302
+5V REG
MTZJ-T-77-5.6B
2SC4154-TP-1EF
Q2
2SA1365-T112-11EP
Q3
RT1N441M-TP-1
Q2,3
RADIO ON/OFF
SWITCH
C302
0.01
B
TP302
L301
(PATTERN)
L302
(PATTERN)
SP
C14
220
10V
C303
1000
10V
C306
47
35V
C308
0.01
B
C304
220
10V
10V
C305
100
C201
TP227 INP-A
TP226
JC204
JC205
JW9
JW28
INP-B
TP303
VDD
TP223
TP103
GND
D204
RB521S-30-TE61
D205
RB520S-30-TE61
TP224
TP225
JW3
BATT
JW14
R224
10k
R225
22k
R226
33k
R227
68k
R223
10k
R222
6.8k
R216
6.8k
R217
10k
R210
15k
TP233
RES
C205
0.01
R215
SEG10
VSSLED
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16/17
SEG18/19
SEG0
POWER
BATT_AD
INPUT_A
VDD
XT2
XT1
VSS
BATT_CHK
SEG9
SEG8
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
SEG20/21
COMIN1
COMIN0
INPUT2
INPUT1
MUTE
BUZZER
INPUT_B
RESET
TP219
BP227
BP228
BP229
POWER
TP220
CHK
330
R214
0
R251
4.7
C203
22p
CH
C212
0.01
B
C214
0.01
B
C213
0.01
B
C204
22p
CH
B
C206
1
F
C209
0.01
B
R211
15k
R249
470k
X1
32.768KHz
JW18
D203
1SS119-25TD
D202
1SS119-25TD
R213
JC201
1.5k
R248
47k
R212
1.5k
R247
JW13
47k
R250
470k
R218
10k
R219
22k
R220
33k
R221
68k
TP104
SCK
INP2
TP105
SIN
INP1
0.22 F
10V
W102
JW1
JW2
L201
22
L202 22
SP1
T301
POWER TRANS
8
Ω
S1
R2
470
R1
2.2k
C34
C307
100P
100P
CH
JC
JW23
L2
FM RF(P
A
TETERN)
FM
AM
IC1 CXA1019S
IC101
LC872B06A
ALARM B
S4
OFF
RADIO
BUZZER
HIGH
LOW
ALARM A
S5
OFF
RADIO
BUZZER
R246
0
R245
R208
R209
470k
SNOOZE
S12
ALARM TIME SET
A -
S21
ALARM TIME
SET B -
S20
ALARM TIME
SET B +
S10
SLEEP
S9
CLOCK
S8
SET-
S7
SET+
S6
S11
ALARM TIME SET
A +
RADIO OFF
S16
S17
BRIGHTNESS
S18
DST
S15
LED101
LED DISPLAY
AM
TRACKING
L1, CT1-1
FM
TRACKING
CT1-2
AM IF
T1
FM
FREQUENCY
COVERAGE
L3, CT1-3
AM
FREQUENCY
COVERAGE
L4, CT1-4
TUNING
CV1-1-CV1-4
VOLUME
AC IN
LITHUME BATTERY
CR2032
1PC. 3V
1PC. 3V
(POWER BACK UP FOR CLOCK)
RADIO ON
AUS, C&SA
SP, AR
SP, AR
*2 R245
0
100k
AUS, C&SA
SP, AR
SP, AR
*1 R208
220k
330k
330k
*2
*1
1.3
( 0.3
)
0.4
( 0
)
1.3
1.3
1.3
1.3
1.3
1.2
1.0
3.1
5.1
0.7
6.2
4.8
5.4
1.3
1.2
1.3
( 0
)
0
1.3
( 0
)
1.2
( 1.4
)
1.3
( 1.2
)
1.3
( 1.1
)
0
5.5
6.2
3.1
6.2
4.9
5.5
12.2
0.3
2.0
0.8
0.8
0.6
0.6
1.1
0.6
0.6
4.9
2.3
1.5
3
2.4
3.0
4.8
0.5
1.0
0.3
0.6
0.6
0.9
0.9
0.9
0.6
4.8
4.8
4.6
0
0
0
0.3
4-2. SCHEMATIC DIAGRAM
Note:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. (p: pF) 50V or
less are not indicated except for electrolytics and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise specified.
•
f
: internal component.
•
C
: panel designation.
•
H
: adjustment for repair.
• Voltages are dc with respect to ground under no-signal condi-
tions.
no mark : FM
( ) : AM
no mark : FM
( ) : AM
Note: The components identified by mark
0
or dotted line
with mark
0
are critical for safety.
Replace only with part number specified.
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal production toler-
ances.
ances.
•
Signal path.
F
: FM
f
: AM
• Abbreviation
AR
: Argentina model
AUS
: Australian model
C&SA : Central & South American model
SP
SP
: Singapore model
• See page 11 for IC Block Diagrams. • See page 11 for Waveforms.
Ver. 1.2
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