Sony ICF-SW35 Service Manual ▷ View online
– 15 –
– 16 –
ICF-SW35
4-4. SCHEMATIC DIAGRAM — MAIN SECTION — • Refer to page 21 for IC Block Diagrams.
(Page 20)
(Page 19)
Q30
C
• Waveform
1
0.2
µ
sec/div
0.1V/div
1.78MHz
4.4Vp-p
ICF-SW35
– 17 –
– 18 –
1
A
B
C
D
E
F
G
H
I
2
3
4
5
6
7
8
9
10
11
R210
R228
R212
R227
R212
R227
R213
R215
R216
R217
R218
R219
R222
R223
R224
R225
R226
R254
R257
R256
R255
C220
C221
C239
C204
C205
JC220
JC206
JC205
JC219
JC223
JC217
C223
C225
C207
C229
C230
C226
R260
JC224
C203
C237
D207
JC218
C201
C224 R259
R253
R204
R205
R201
R206
R267
R207
R264
R265
C233
R268
B
B
E
E
B
E
C
C
C
B
D
56
43
45
50
55
15
28
25
20
1
14
5
10
42
40
29
30
35
E
B
E
C
C
G
S
1
5
10
15
20
R270
R266
R271
R269
C238
R252
R248
R246
R245
R247
R239
R235
R234
R236
R238
R240
R237
R243
R241
R244
R242
R250
R251
R249
R263
R262
R261
C232
C228
C227
C231
R272
R209
C236
IC205
IC203
IC204
C206
R208
R203 R202
C222
R220
R221
C213
C212
C210
C211
C209
C208
JC204
JC211
JC207
JC216
JC210
JC209
JC202
JC201
JC212
JC213
JC203
JC208
JC215
JC214
C216
IC202
IC201
R230
R231
R229
C215 R214
C214
C214
R211
L202
L201
R232
JC221
JC222
R233
C217
C218
11
(11)
D201
D202
D203
Q205
D206
D208
Q202
Q204
Q203
Q201
Q206
Q207
D204
04
S217
(9K/10K)
1-677-231-
MICON BOARD
C235
MAIN
BOARD
CN1
D205
(BACK LIGHT)
CN201
9K 10K
ON OFF
FINE NORMAL
NORMAL..FINE
C234
S207
4
S206
5
S201
2
S202
1
S211
BAND
S201,202,205-208
MEMORY PRESET PAGE
S213,214
TUNE/SCAN/TIME SET
S213
S214
S216
HOLD
S219
LIGHT
S203
SLEEP
S204
ON/OFF
S212
S218
ENTER/CLOCK
S215
SW BAND
S209
TIMER STANDBY
/STANDBY TIME SET
STANDBY MEMORY
b
S210
a
1
C202
2
5
6
9
10
15
16
17
18
S208
3
S205
MEMORY
SCAN
TP
(BAR/ROD)
TP
(KR2)
TP
(KS2)
TP
(KS1)
TP
(D-DOUT)
TP
(VT)
TP
(RF GND)
TP
(VCOL)
TP
(VCOH)
TP
(BATT)
TP
(POWER)
TP
(TUNER VDD)
TP
(KR3)
TP
(EA)
TP
(CE9)
TP
(10.25)
TP
(H/L)
TP
(TUNE)
TP
(BEEP)
TP
(KR1)
TP
(KR0)
TP
(KS0)
TP
(MUTE)
TP
(KS3)
TP
(AM/FM)
1
4
8
5
1
2
3
1
1 2 3
2
3
POWER
LCD201
LIQUID CRYSTAL DISPLAY PANEL
X201
1
D
S
G
A
MAIN
BOARD
IC1
BOARD
IC1
(US)
21
Note on Printed Wiring Boards:
•
X
: parts extracted from the component side.
•
Y
: parts extracted from the conductor side.
•
f
: internal component.
•
b
: Pattern from the side which enables seeing.
D201
D-4
D202
D-5
D203
D-5
D204
D-2
D205
C-10
D206
C-9
D207
C-8
D208
C-8
IC201
C-5
IC202
C-4
IC203
C-9
IC204
C-8
IC205
C-8
Q201
D-7
Q202
D-7
Q203
D-6
Q204
D-7
Q205
C-8
Q206
B-9
Q207
B-9
• Semiconductor
Location
Ref. No.
Location
4-5. PRINTED WIRING BOARD — MICON SECTION —
(Page 14)
(Page 13)
– 19 –
– 20 –
ICF-SW35
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
f
: internal component.
•
C
: panel designation.
•
U
: B+ Line.
•
H
: adjustment for repair.
• Power voltage is dc 4.5 V and fed with regulated dc power
supply from battery terminal.
• Voltage is dc with respect to ground under no-signal
(detuned) condition.
no mark : FM
(
no mark : FM
(
) : MW/LW
<
> : SW
4-6. SCHEMATIC DIAGRAM — MICON SECTION — • Refer to page 21 for IC Block Diagrams.
(Page 15)
(Page 15)
– 21 –
GND
30
PLL LPF
29
NPX REG
28
VCO
27
FM
DISCRI
26
MUTE
25
AM OSC
24
AFC
23
FM OSC
22
REG
21
FM RF
20
AM RF IN
19
FM RF IN
18
FE GND
17
FM/AM
FE OUT
16
PLL LPF
1
PILOT DET
LPF1
2
3
PILOT DET
LPF2
ST IND/
VCO CHECK
4
RCH OUT
5
LCH OUT
6
VCC
7
RIPPLE
FILTER
8
AGC/AFC1
9
AGC/AFC2
10
GND
11
TUNE IND
12
FMIF IN
13
AMIF IN
14
BAND SELECT
15
FM FRONT-END
FM FRONT-END
FM IF/
DISCRI
AM IF/
DET
TUNING
INDICATOR
BAND PASS
MUTE
REG
AUTOBLEND
RIPPLE
FILTER
MUTING
MPX REG.
VCO
1/2
COUNTER
1/2
COUNTER
DECORD AMP
MONO/ST
SELECT
PO2
PO1
IN1
IN2
NC
NC
NF2
GND2
P-GND2
OUT2
RIPPLE
PRE+POWER1
PRE+POWER2
REG
VOL
16
REG
15
VOL
14
NF1
13
GND1
12
P-GND1
11
OUT1
10
VCC
9
1
2
3
4
5
6
7
8
1
2
3
4
GND
OUT
NC
C
8
7
6
NC
IN
NC
5
NC
TRIGGER
CIRCUIT
REGULATOR
REFERENCE
ERROR
AMP
3
GND
1 OUT
2 VDD
VREF
1
2
3
VOUT
VIN
GND
VREF
IC1 CXA1238S
• IC Block Diagrams
IC2 CXA1522P
IC203 RN5RL27AA-TR
IC3 LA5002MTP1
IC204 R3111Q271A-TR
IC205 R3111Q331A-TR
IC205 R3111Q331A-TR
Click on the first or last page to see other ICF-SW35 service manuals if exist.