Sony ICF-CD855 / ICF-CD855L Service Manual ▷ View online
ICF-CD855/CD855L
25
25
C64
R42
R16
C3
Q41
Q42
C45
R43
C46
C5
R9
C6
R18
Q44
C48
C73
C71
C72
C44
R7
Q43
L3
D1
R32
R30
C35
C33
L1
C34
C31
C80
C30
R31
L2
D2
R24
IC1
C12
C9
C7
T2
T1
C11
C8
C10
R3
C18
C15
C14
C77
C78
C1
TP
R2
C4
D11
D10
C24
C23
C21
R11
C22
C20
C25
R12
Q12
C93
Q14
R17
R19
R22
C2
L4
C40
C70
C39
C37
C43
C42
C41
R40
C49
R41
D3
R66
R93
C61
C62
C63
C29
R61
R60
R59
R58
C66
C68
R56
CNP1
R94
C60
R4
C58
TP
R63
C57
C55
C95
R54
C54
R53
C59
R51
C53
R64
C52
C51
X1
R50
R52
C56
Q61
CT5
JC24
CT1
CT3
JC3
JC23
JC6
R1
CF2
CF4
JC22
IC2
R91
JC4
C32
JC34
JC2
JC33
R10
JC1
R92
R13
JC5
TP
ANT1
100p
100k
10k
0.01
DTC343TK
2SC4098
0.01
10k
0.1
0.01
100k
0.01
4.7k
2SC4098
47p
22p
100p
22p
220p
470k
2SC2059K
KV1471E
100k
15k
0.01
0.01
0.01
22p
0.01
0.01
3.3k
KV1471E
220
TA2149N
4.7
50V
50V
10p
5p
0.1
1000p
1
50V
10k
220
10V
10V
0.01
0.01
4700p
4700p
47p
(ANT)
470
1000p
1SS355
1SS355
220p
1
50V
1
50V
3.3k
0.1
0.1
4700p
47k
DTC114YUA
0.01
2SC4081
2.2k
2.2k
10k
0.01
10p
5p
0.1
0.01
47p
100p
220p
470k
0.1
10k
KV1520NT
47
1k
100p
100p
100p
100
10V
10V
2.2k
2.2k
2.2k
2.2k
100p
100p
330
L21
10
µ
H
11P
1k
1000p
10k
0.01
(VT)
4.7k
1000p
100p
1000p
470
220
10V
10V
4.7k
1000p
10k
0.47
1k
10p
22p
75KHz
1k
100
1000p
2SK514-F
0
0
0
0
470
0
LC72137M-TLM
220
0
1000p
0
0
0
47
0
220
1k
0
(GND)
VT
X
OU
T
X
IN
L
P-OU
T
LP
-IN
P
D
VSS
V
D
D
M
O
/ST
FM
IN
AM
IN
C
E
DI
CL
D
O
BA
N
D
ST
-IN
D
IF IN
M
U
TE
AM OSC
FM OSC
VCC1
OSC-OUT
IF-OUT
DET
-OUT
MPX-IN
R-OUT
L-OUT
ST
-IND
QUAD
GND2
IF-IN
AM
IF-IN
FM
VCC2
AGC
LPF1
/BAND
LPF2
/MO-ST
GND1
FM
RF-IN
RF-OUT
AM
RF-IN
FM
AM
LO
W
CU
T
OUT
MIX-
BA
ND
FM/AM PLL
R-MUTE
R-COUNT
R-CLOCK
R-DATA
R-CE
A-GND
S-GND
FM IFT
AM IFT
FM OSC
FM
RF
FM/AM RF AMP,
MIX,OSC,IF AMP,
DET,MPX
ANTENNA
ANTENNA
S
CONSTANT
CURRENT
M
W
/L
W
MW BAND
SELECT
SWITCH
AM HIGH
SWITCH
CUT
MW/LW OSC
-1
-2
ANTENNA
LW FERRITE-ROD
MW FERRITE-ROD
L3-1
L3-2
MW SWITCH
MW SWITCH
LW SWITCH
LW SWITCH
TU-LCH
TU-6.0V
TU-RCH
FM LEAD WIRE
6-10. SCHEMATIC DIAGRAM – TUNER Board (ICF-CD855L) –
•
See page 30 for Waveform.
•
See page 30 for IC Block Diagrams.
(Page 29)
ICF-CD855/CD855L
26
26
R608
R607
R610
R609
R612
R611
R614
R613
R618
R617
R616
R615
R601
C611
R603
C612
R605
C613
E C B
Q603
E C B
Q602
E C B
Q601
S601
S602
S603
S604
S605
S606
W601
D601
D609
(LCD BACK LIGHT)
D602
D603
KEY-A BOARD
(11)
1-861-273-
1
6
R632
R633
R635
R634
R619
R620
R622
R621
R623
R624
R626
R625
R627
R628
R631
C601
C604
R640
C603
R638
C602
R636
R629
R630
Q606
BC
E
Q604
BC
E
Q605
BC
E
W602
D606
D605
D604
JW602
S612
S611
S610
S609
S608
S608
S614
S607
S613
W605
KEY-B BOARD
(11)
11
1-861-272-
7
1
1
2
C610
CNP606
JC605
R666
C619
R664
R662
R661
E C B
Q611
E C B
Q612
R658
C618
C607
R660
R655
R656
E C B
Q609
E C B
Q610
1
1
1
W607
2
LCD601
LIQUID CRYSTAL DISPLAY
32
2
17
18
CNP607
1
2
17
18
2
W606
1
JW601
LCD BOARD
(11)
11
1-861-270-
(11)
11
1-861-274-
SIDE BOARD
R654
R652
R653
R650
R651
R648
R649
R667
W603
S616
S617
S618
1
4
R646
R647
W605
SNOOZE BOARD
(11)
11
1-861-275-
S615
1
2
W604
(11)
11
1-861-276-
SWITCH BOARD
1
2
PRESET
TUNING
TUNING
5
SELECT
PRESET
S601
PRESET
TUNING
TUNING
4
SELECT
PRESET
S602
PRESET
TUNING
TUNING
3
SELECT
PRESET
S603
PRESET
TUNING
TUNING
2
SELECT
PRESET
S604
PRESET
TUNING
TUNING
1
SELECT
PRESET
S605
ALARM A
11
ALARM A
BUZZER
D601
ALARM A
RADIO
D602
D603
ALARM A
CD
D606
D605
MAIN
BOARD
CNP601
D
MAIN BOARD
CNP302
G
MAIN BOARD
CNP301
H
D610
(LCD BACK LIGHT)
ALARM B
BUZZER
ALARM B
RADIO
D604
ALARM B
CD
ALARM B
SLEEP
CD
NAP
RADIO ON
BAND
OFF
ALARM RESET
TUNE
TIME SET
+
TUNE
TIME SET
–
SNOOZE
SLEEP OFF
MAIN
BOARD
W603
F
MAIN
BOARD
W604
E
MODE
–
+
VOL
S619
CD LID
OPEN/CLOSE
DETECT
A
B
C
D
E
F
G
H
I
J
1
2
3
4
5
6
7
8
9
10
11
12
MAIN
BOARD
CNP602
J
6-11. PRINTED WIRING BOARDS – PANEL Section –
•
See page 19 for Circuit Boards Location.
:Uses unleaded solder.
(Page 27)
(Page 27)
(Page 27)
(Page 27)
(Page 27)
(Page 27)
D601
J-2
D602
J-2
D603
J-2
D604
J-12
D605
J-12
D606
J-12
D609
I-3
D610
I-10
Q601
I-2
Q602
I-2
Q603
J-2
Q604
J-12
Q605
J-12
Q606
I-12
Q609
J-4
Q610
J-4
Q611
J-10
Q612
J-10
• Semiconductor
Location
Ref. No.
Location
ICF-CD855/CD855L
27
27
C302
R301
R302
R303
C917
C922
C918
C454
C455
R407
C909
R913
R912
R909
R914
R910
C907
R919
C910
R911
E C B
Q905
E C B
Q904
AK
D904
R493
R494
R492
C442
R491
X402
IC402
IC401
R916
C450
C436
C437
C919
R917
R915
C914
C915
JC302
R490
R408
R410
C402
C403
R405
R443
C453
C412
R444
C406
C410
R446
R447
R450
C411
C413
R453
R456
R462
R459
C409
R457
R460
R451
R449
R445
R454
R401
C458
C445
C444
R488
C438
C447
C448
R486
R485
R484
R483
R482
R481
R480
R479
C421
C420
R469
R466
R463
C416
R467
R503
R502
C415
C457
R478
R477
R476
C427
C426
C423
C422
C419
C417
C418
R465
R464
C425
C424
R475
R474
R473
R472
R470
R468
JC301
R471
C435
C434
C433
C432
C431
C430
C429
C428
R496
C443
C401
R403
E C B
Q909
E C B
Q907
D907
K
A
K
D908
R918
C912
R906
C903
C319
C112
R223
R220
R121
R108
R107
C106
C107
R208
R207
R101
C121
R201
C221
C102
C202
C206
C207
C111
R209
R210
R214
R213
R113
R114
R311
R310
C318
R211
C211
C214
C215
R215
C115
C114
R115
C212
R313
R110
R109
R111
R221
R123
R120
C317
R102
R103
R202
C316
C109
C108
C209
R203
C101
C208
C201
R104
R204
C103
C203
C309
C310
R205
R105
C314
R308
R309
R497
R314
R219
R119
C118
C312
C313
C218
C324
R117
R217
R312
Q301
B C E
L402
E C B
Q401
Q402
B C E
L401
E C B
Q302
Q202
Q102
D201
D101
AK
AK
D203
D103
E
C
B
E
C
B
Q201
B C E
Q101
B C E
IC301
IC302
D903
(11)
11
1-861-269-
MAIN BOARD
CNP602
C921
S401
S401
Q908
+
1
CD BOARD
CNP702
7
JW308
JW309
JW310
JW316
JW306
JW307
JW313
JW312
JW311
JW305
JW304
JW302
JW315
JW322
JW319
JW332
JW320
JW318
JW321
JW317
D905
Q906
D906
E
C
B
Q903
E
C
B
C911
+
C905
+
C913
+
C320
+
C120
+
C220
+
C908
+
1
4
W603
JW330
JW331
JW327
JW324
JW323
JW328
JW329
JW343
JW346
JW341
JW345
JW347
JW354
JW353
JW344
JW333
JW334
JW335
JW336
JW326
JW325
C923
+
C304
+
C449
+
C408
+
JW303
JW346
JW355
1
2
13
14
CNP303
CNP302
JW301
1
2
17
18
CNP301
1
1
2
2
17
18
X401
JW342
JW337
JW338
JW339
JW349
JW350
JW340
+
C902
W901
CNP901
1
1
2
2
JW352
JW351
W604
BH301
JW358
JW363
JW359
JW364
JW365
JW360
JW361
JW362
JW372
JW373
JW374
JW356
JW357
JW369
JW370
JW371
1
6
1
11
CNP601
C311
+
C315
+
C327
+
S403
D102
D202
JW375
JW376
C219
C117
+
+
C119
+
JW377
JW368
JW367
JW366
J301
CNP304
1
1
6
12
7
4
C217
+
C325
+
C323
+
C322
+
C110
+
C210
+
A
KEY-B BOARD
W602
J
2
3
1
C
E
B
BRIGHTNESS
LOW
MID
HI
SIDE BOARD
W603
F
A
A/K
K
K
A
LCD BOARD
CNP607
G
LCD BOARD
CNP606
H
1
80
40
21
20
60
61
41
(CHASSIS GND)
(AC IN)
POWER
UNIT
K
KA
A
1
12
24
13
SP101
(L-CH)
(L-CH)
SP201
(R-CH)
1
4
CLOCK
KEY-A BOARD
W601
D
TUNER BOARD
CNP1
C
TUNER BOARD
CNP1
SWITCH
BOARD
W604
B
E
(CD855)
(CD855L)
A
B
C
D
E
F
G
H
1
2
3
4
5
6
7
8
9
10
11
6-12. PRINTED WIRING BOARD – MAIN Section –
•
See page 19 for Circuit Boards Location.
:Uses unleaded solder.
(Page 26)
(Page 24)
(Page 26)
(Page 26)
(Page 26)
(Page 20)
(Page 26)
(Page 26)
D101
F-4
D102
F-2
D103
F-4
D201
G-5
D202
F-2
D203
F-4
D903
G-10
D904
G-10
D905
G-9
D906
G-8
D907
D-8
D908
D-7
IC301
E-3
IC302
G-4
IC401
C-6
IC402
D-4
Q101
F-4
Q102
G-4
Q201
F-4
Q202
G-5
Q301
F-7
Q302
F-5
Q401
D-4
Q402
D-4
Q903
G-7
Q904
G-10
Q905
G-10
Q906
G-9
Q907
E-7
Q908
E-9
Q909
E-8
• Semiconductor
Location
Ref. No.
Location
(Page 22)
ICF-CD855/CD855L
28
28
LCD601
W607
W606
C401
R401
R
405
C454
C435
C434
C433
C432
C431
C430
C429
C428
R486
R485
R484
R483
R482
R481
R480
R479
C436
C437
R488
R407
C408
C406
C409
R444
L401 100
µH
R
451
R454
R
457
R
460
R
453
R456
R
459
R
462
CNP601
CNP602
W603
W604
C453
C411
C
412
C
410
R
466
R469
R468
Q401
R502
C413
C417
C415
C457
C427
C426
C
425
C424
C423
C
422
C421
C419
C420
R497
C402
C403
W601
R636
R638
R640
C602
C603
C604
S607
S608
R631
R648
R649
R650
R651
R667
R652
R653
R654
W602
C445
C444
R494
R493
R492
R491
C442
C458
C443
R464
R465
Q402
R503
R490
C607
C618
R
655
R
661
R662
C619
R664
R660
R467
R478
R463
C416
CNP301
CNP606
CNP302
CNP607
D610
D609
JC605
Q611
Q612
Q610
Q609
R666
R403
R410
R408
C455
S401
X401
R
470
R
471
R472
R
473
R474
R475
R
476
R
477
R447
R449
R
450
R445
S403
W604
W605
R633
R632
R634
R635
R619
R620
R621
R622
R623
R624
R625
R626
R627
R628
R629
R630
S612
S611
S610
S609
S614
S613
S618
W603
S616
S617
W605
S615
R646
R647
R
658
R
656
S606
S605
S604
S603
S602
S601
R603
C612
C611
R601
R605
C613
R607
R608
R610
R609
R616
R615
R614
R613
R612
R611
R617
R618
Q602
Q601
Q603
Q606
Q605
Q604
C438
BP401
BP403
BP402
D601
D602
D603
D605
D604
D606
C601
S619
IC401
C
610
1
100k
100k
0.01
2200p
2200p
2200p
1000p
1000p
2200p
2200p
2200p
10k
10k
10k
1k
1k
10k
10k
10k
22p
22p
220k
4.7k
100
10V
2.2
0.01
10k
10k
10k
10k
10k
100k
100k
100k
100k
6P
7P
0.01
0.01
0.01
100p
1k
1k
1k
MUN5113T1
10k
0.01
1000p
100p
1000p
0.01
100p
1000p
100p
220p
100p
220p
100p
100p
100
1
1
6P
1k
1k
1k
1
1
1
100
100k
22k
47k
22k
100
22k
47k
100
0.01
0.01
1k
1k
1k
10k
0.01
0.01
0.01
47k
22k
MSD1819A
-RT1
100k
0
1
1
470
470
1k
1
1k
100
1k
1k
1M
1000p
18P
18P
18P
18P
SLP-WH118A-51
SLP-WH118A-51
0
DTA114EUA
DTA124EUA
DTA124EUA
DTA114EUA
100
100k
10k
22k
470p
32.768KHz
1k
47
100
1k
1k
1k
1k
1k
220k
47k
470k
47k
47k
220k
470k
220k
100k
470k
47k
47k
47k
100k
22k
22k
47k
100k
220k
1k
1k
1k
1
1
1k
1k
1
220k
470k
100k
220k
22k
100k
47k
47k
470k
47k
22k
47k
DTC144EUA
DTC144EUA
DTC144EUA
DTC144EUA
DTC144EUA
DTC144EUA
2.2
L402
220
µH
TOL-31CSGAKAA
-KSO1
TOL-31CSGAKAA
-KSO1
TOL-31CSGAKAA
-KSO1
TOL-31CSGAKAA
-KSO1
TOL-31CSGAKAA
-KSO1
TOL-31CSGAKAA
-KSO1
1
-A39-8BT
µPD789477GC
1
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
COM0
COM1
COM2
COM3
SEG0
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
COM0
COM1
COM2
COM3
SEG0
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
BCD
BRA
BRA
BCD
BBU
BBU
ACD
ACD
ARA
ARA
ABU
ABU
KEY0
KEY1
KEY2
KEY3
OPEN
KEY0
KEY1
KEY2
KEY3
OPEN
DI
CE
CL
WRQ
DO
RES
MUTE
CLK
DA
T
A
PLL
DRF
A1
A1
SEQ
OPEN
∗
∗
∗
LIQUID CRYSTAL DISPLAY
SEG
27
S
EG
26
SEG
25
S
EG
24
SEG
23
S
EG
22
S
EG
21
SEG
20
SEG
19
S
EG
18
S
EG
17
S
EG
16
S
EG
15
S
EG
14
SEG
13
S
EG
12
S
EG
11
S
EG
10
S
EG
9
SEG
8
SEG
7
SEG
6
S
EG
5
S
EG
4
SEG
3
SEG
2
SEG
1
S
EG
0
CO
M
3
C
O
M
2
C
O
M
1
CO
M
0
1
2
1
2
DRF
V
ER
S
IO
N
K
EY3
K
EY2
K
EY
1
K
EY0
AV
S
S
R
C
LK
A
C IN
W
R
Q
M
UT
E
BUZ
ZER
XRS
T
R CE
R
D
ATA
C
D CE
C
D C
LK
CD DA
TA
CD DA
T
A-IN
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
AVDD
FSEQ
OPEN
CD
NC
AMUTE
RESET
X2
X1
VSS0
VDD0
XT2
XT1
IC
CD ON
RADIO ON
ALARM B CD
ALARM B RADIO
ALARM B BUZ
VOL DAT
VOL CLK
ALARM A CD
ALARM A RADIO
ALARM A BUZ
N
C
N
C
VL
C2
VL
C1
VLC
0
COM
0
C
OM
1
C
OM
2
C
OM
3
SEG
0
S
EG
1
S
EG
2
SEG
3
S
EG
4
SEG
5
SEG
6
SEG
7
S
EG
8
S
EG
9
SEG10
1
4
1
2
1
4
1
7
(1/2)
2
1
(LCD BACK LIGHT)
(LCD BACK LIGHT)
LED DRIVE
Q609-612
BRIGHTNESS
MID
HI
LOW
SYSTEM CONTROLLER
Q401,402
AC CHECK
∗
R447
1k
10k
100k
(CD855:CND)
(CD855L:UK)
∗
(CD855:CND)
R449
0
2.2K
22k
47k
(CD855:IT)
(CD855L:AEP)
∗
(CD855:CND)
22k
100k (CD855:IT/CD855L)
(CD855:IT/CD855L:AEP)
CLOCK
(CD LID OPEN/CLOSE DETECT)
LED DRIVE
Q604-606
1
2
2
1
CD
RADIO
BUZZER
ALARM B
ALARM RESET
OFF
-
TIME SET
TUNE
TIME SET
TUNE
+
SLEEP
NAP
ALARM B
CD
RADIO ON
BAND
VOL +
VOL -
MODE
SNOOZE
SLEEP OFF
LED DRIVE
Q601-603
CD
RADIO
BUZZER
ALARM A
ALARM A
PRESET
5
1
2
3
4
/
SELECT
PRESET TUNING
(CD855L:UK)
R450
P
OW
ER ON
X402
4.19MHz
6-13. SCHEMATIC DIAGRAM – MAIN Section (1/2) –
•
See page 30 for Waveforms.
•
See page 34 for IC Pin Function Description.
(Page 29)
Click on the first or last page to see other ICF-CD855 / ICF-CD855L service manuals if exist.