Sony ICF-CD873L (serv.man2) Service Manual ▷ View online
ICF-CD873L
5
5
1-4.
SCHEMATIC DIAGRAM – MAIN Section (2/2) –
R121
C121
R221
C221
R210
Q220
R220
C220
R120
FB501
L301
R302
R209
C204
R208
C
3
0
2
C
3
0
1
R
3
0
3
C
3
0
3
R109
C104
R107
C103
R207
C203
L505
R105
R103
C101
R104
R106
C102
C546
C545
C544
L502
L504
C541
C542
R547
R554
R203
C202
C201
R204
L503
X501
R101
R102
C547
C549
C551
C550
R202
R201
R205
R206
D501
C562
C566
C
5
6
5
C
5
6
4
C
5
6
3
C567
C537
R542
R543
R544
C538
Q120
C120
C324
R222
R122
R18
TP8
TP7
C22
R20
IC1
C17
CF3
C18
R2
R1
C5
R9
R10
R14
C36
C10
CT4
C15
C14
L4
C13
C12
R6
D4
C6
R58
D1
C60
R57
R51
R50
C
5
0
C
5
2
C
5
3
X50
TP50
C54
R53
Q51
Q50
C62
C61
R59
C67
L50
R
5
4
R320
C320
C321
R322
W707
W706
C472
W8
CN502
CN302
RV301
CN301
R19
C20
C21
Q2
R4
IC50
C559
C105
C
5
3
6
Q321
R5
BPF1
R16
Q320
C
2
0
5
D320
TP53
R110
C412
C27
C31
C32
C
3
0
R17
C29
L5
C23
R13
RV1
R12
R56
R7
TP13
CT1
C16
TP12
C3
C4
R3
C2
L2
C1
C
T
3
CT2
C9
C7
R324
R325
IC320
C322
R60
L51
R553
C540
C539
R545
R546
C543
R321
C
5
1
R
5
2
RV302
L302
C
5
5
C56
C57
C58
C66
C64
C63
D2
D3
C19
R15
BH570
IC502
R55
L3-2
L3-1
ANT1
T1
L1
C
5
6
1
C560
R108
R540
C65
C59
R548
C548
D321
R8
Q1
C323
C
F
2
CF1
C25
C24
C26
C28
M570
M571
S570
R11
R323
2.2k
4.7
50V
50V
2.2k
4.7
50V
50V
0
2SC2412K
1k
1000p
1k
1.1UH
4.7k
2.2k
47p
10k
2
2
0
1
0
V
0
.0
1
4
.7
k
1
0
0
1
6
V
2.2k
47p
10k
47p
10k
47p
47k
22k
47p
22k
47k
100p
100
16V
16V
0.01
0.01
0.01
0.22
220k
10k
22k
100p
47p
22k
16.933MHz
22k
22k
1000p
47p
0.01
10p
22k
22k
47k
47k
1SS120RX
100p
100p
1
0
0
p
1
0
0
p
1
0
0
p
100p
0.47
1k
3.3k
10k
470p
2SC2412K
1000p
0.01
1k
1k
6.8k
100p
470
CXA1238M
47
16V
10.7MHz
2.2
50V
50V
100k
100k
1000p
100k
3.3k
220k
22p
390p
30p
39p
270p
0.01
15p
1M
KV1563MTL
-2.3
470p
10k
1SS226-
TE85L
0.33
10k
470
4.7k
1
0
0
0
p
4
.7
5
0
V
1
0
0
0
p
75KHz
33p
1k
2SC2412K
2SC2412K
0.01
0.01
100k
100p
1
k
4.7k
10
50V
1000p
1k
10P
10P
100p
6P
7P
7P
220k
0.47
4.7
50V
50V
2SC2714
10k
BU2614FS
0.01
470p
0
.1
2SC2412K
1M
2.2k
DTA124EKA
4
7
0
p
1SS355-TE-17
0
0.01
0.01
1
0.01
0
.0
1
5
6.8k
0.015
0.01
10k
22k
100
10k
4.7k
10p
0.01
10p
3p
4.7k
1000p
1000p
3
0
p
10p
0.01
120p
10k
1k
BU4066BCF
0.01
10k
100k
100
10V
10V
100p
1M
10k
0.01
10k
1
0
5
0
V
1
k
0
1
8
p
100p 100p 100p
1000p
0.01
47
35V
1T362-04
-T88
1T362-04
-T88
100
10V
10V
2.2k
7P
CXD2508AQ
1k
1
0
0
p
100p
10k
10k
100p
470p
100k
0.1
DAP202K
1M
2SC2714
1000p
1
0
.7
M
H
z
450KHz
1
4.7
50V
50V
47
16V
47
16V
1k
1k
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
D1
D2
D3
E1
E2
E3
E4
F1
F2
F3
H1
H2
H3
H4
I1
I2
I3
I4
J1
J2
J3
MDP
MDS
FILD
FILI
PCO
VDD
AVSS1
CLTV
AVDD1
RF
BIAS
ASYI
ASYO
ASYE
W
O
C
K
LR
C
K
L
R
C
K
I
P
C
M
D
P
C
M
D
I
B
C
K
B
C
K
I
G
T
O
P
X
U
G
F
X
P
C
K
G
FS
R
F
C
K
V
S
S
C
2
P
O
X
R
O
F
M
N
T
1
M
N
T
0
F
S
T
T
C
4M
D
O
U
T
E
N
P
H
E
M
P
H
I
W
F
C
K
M
N
T
3
DTS3
DTS2
RPWN
NRPWN
AVSS2
AVSS3
XTAO
XTAI
AVDD3
AVDD2
LPWM
NLPWM
VDD
DTS1
ZEROR
ZEROL
M
O
N
FO
K
X
L
O
N
X
T
S
L
S
P
O
C
C
P
O
B
S
P
O
A
C
L
K
0
X
T
L
0
D
A
T
0
C
N
IN
S
E
IN
V
S
S
C
L
O
C
K
X
L
A
T
D
A
T
A
S
E
N
S
M
U
T
E
S
Q
C
K
S
Q
S
O
E
X
C
K
S
B
S
O
S
C
IR
V MUTE
CD ON
BUZZER
AC IN
CD 5V
CD GND
CD 6V
CD GND
GND
5V
LOCK
TEST
POWER ON
BASS ON
GND
VT
L CH
GND
R CH
VOL OUT
VOL IN
F
M
F
M
R
F
R
EG
F
M
O
S
C
A
FC
AM
O
S
C
M
U
TE
D
IS
C
R
I
VC
O
M
PX
R
E
G
P
LL
AM
B
A
N
D
A
M
IFIN
IFIN
FM
AG
C
A
G
C
R
IP
P
LE
FIL
TE
R
LC
H
O
U
T
R
C
H
O
U
T
S
T
IN
D
P
IL
O
T
P
ILO
T
P
L
L
L IN
R IN
L OUT
GND
VOL IN
R OUT
VOL OUT
BA4558F
BA4558F
SL +
SL -
SP -
SP +
SW
GND
5V
(SLED)
(SPINDLE)
(LIMIT)
VOLUME
-1
-2
MEGA BASS
G
N
D
L
PF
2
LP
F1
D
E
T LP
F2
D
ET
L
P
F2
V
C
C
A
FC
1
A
FC
2
G
N
D
IN
D
T
U
N
E
S
E
LEC
T
FM
/A
M
FE OUT
FM
G
N
D
R
F IN
R
F IN
FM/AM
FRONT-END,
FM/AM DET,
MPX
(FM IN)
(VT)
MUTING
MUTING
MEGA BASS
MUTE
CD/TUNER
SELECT
SWITCH
V
D
D
V
S
S
Q50,51
LOW-PASS
FILTER
V
S
S
P
D
1
V
D
D
1
V
D
D
2
F
M
IN
A
M
IN
P
2
IF
IN
X
O
U
T
X
IN
C
E
C
K
D
A
C
D
P
0
P
1
FM/AM PLL
FM WIRE
ANTENNA
MUTING
CONTROL
SWITCH
LOW-PASS
FILTER
IC301(1/2)
IC301(2/2)
X
R
S
T
DIGITAL SIGNAL PROCESSOR,
CLV SERVO,D/A CONVERTER
FM OSC
(VCO)
(+B)
(FM IN GND)
(VT GND)
(LW)
(MW)
(1/3)
(3/3)
(2/3)
MW/LW OSC
MW/LW
SWITCHING
ANTENNA
MW/LW
FERRITE-ROD
L3
MW/LW SWITCHING
FM RF
(2/2)
47
µH
10
µH
10
µH
10
µH
10
µH
47
µH
10
µH
4.7
µH
(Page 4)
(Page 7)
(Page 7)
(Page 7)
ICF-CD873L
6
6
R901
R902
R903
C912
R907
C915
R906
C369
C368
R364
C367
R366
R365
R904
R905
EC
B
Q903
E
C
B
Q350
E
C
B
Q904
K
A
D911
R352
R351
R355
R353
EC
B
Q351
C351
+
EC
B
Q353
R254
R371
R373
K
A
D351
A
R369
R354
R251
C152
C252
C250
C250
C354
C154
C153
R154
EC
B
Q352
R370
R250
R153
R257
C364
R362
C363
C363
C365
C366
C366
R363
R360 R361
EC
B
Q354
R157
R356
R359 C358
R357 R358
C254
R253
C253
R908
C355
C374
R155
R255
EC
B
Q150
EC
B
Q250
C910
C903
C902
C905
C906
C904
C907
R375
R156
R256
C916
C919
C920
R372
EC
B
Q355
R152
R252
C150
R150
R151
R150
R151
K
A
A
A
D350
LF901
T901
POWER
TRANSFORMER
F901
+
C917
1
2
CN307
1
6
CN305
+
C361
+
C360
+
C356
1
1
IC351
+
C359
+
C362
+
C155
1
4
CN306
B
C
E
Q251
+
C255
+
C251
+
C370
+
C353
+
C352
+
+
C357
C911
+
C151
1
10
CN304
R909
R910
D907 D908
D906
D905
D910
D909
E
B
Q902
E
B
Q901
+
+
+
C913
C914
+
C918
+
C909
+
C908
C901
D902
D901
D903
D904
10
IC350
1
10
CN303
E
C
B
Q151
1
6
C380
+
W708
L180
L380
R381
R380
L280
J301
(HEADPHONE)
AC IN
SP301
MEGA BASS
SPEAKER
(14)
14
1-673-799-
SP101
L-CH FRONT
SPEAKER
SP201
R-CH FRONT
SPEAKER
MAIN BOARD
W8
MAIN
BOARD
W706
A
MAIN
BOARD
W707
B
C
(14)
14
1-673-799-
POWER BOARD
(COMPONENT SIDE)
POWER BOARD
(CONDUCTOR SIDE)
(14)
14
1-673-801-
(14)
14
1-673-801-
(CONDUCTOR SIDE)
HEADPHONE BOARD
(COMPONENT SIDE)
HEADPHONE BOARD
A
B
C
D
E
F
G
H
1
2
3
4
5
6
7
8
9
10
11
15
TM902
TM901
BLK
WHT
1-5.
PRINTED WIRING BOARD – POWER SUPPLY Section –
D350
H-6
D351
G-6
D901
D-6
D902
D-6
D903
D-6
D904
D-6
D905
E-8
D906
E-8
D907
E-8
D908
E-8
D909
E-6
D910
E-7
D911
F-6
IC350
G-7
IC351
G-8
Q150
F-9
Q151
H-9
Q250
E-9
Q251
G-8
Q350
H-6
Q351
H-6
Q352
H-7
Q353
H-7
Q354
H-8
Q355
H-8
Q901
E-6
Q902
E-7
Q903
F-6
Q904
F-6
• Semiconductor
Location
Ref. No.
Location
(Page 3)
(Page 3)
(Page 3)
ICF-CD873L
7
7
1-6.
SCHEMATIC DIAGRAM – POWER SUPPLY Section –
(Page 5)
Q250
R256
R156
CN305
R381
C380
L280
L180
L380
R380
W708
J301
R255
R155
Q150
C255
Q151
CN306
R157
R257
Q251
CN307
SP301
SP201
SP101
W8
R362
C364
C363
C365
C366
R363
C3
74
R
360
C360
R359
C357
C358
R3
61
C361
C359
C362
IC351
R375
R357
R358
C356
C355
R356
R152
R252
C152
C252
C352
C353
C253
R25
3
C254
C251
C151
C150
R150
R250
C250
R367
IC350
Q354
C154
C153
R153
C354
R154
R254
C155
C909
C910
C908
D902
R903
R902
D901
R901
C351
R354
C901
D904
D903
C902
D905
D906
C903
C904
D907
D908
C906
C905
C912
D909
C913
R907
C916
C915
C914
D910
C917
Q902
R908
R906
Q350
R351
R352
Q351
R251
R151
Q353
R371
R372
Q355
C369
C368
R364
C367
R365
R366
R370
R373
Q352
R369
C370
D351
D350
Q904
R909
Q901
R910
R904
R905
Q903
D911
C918
C919
C920
T901
LF901
F901
C907
C911
CN303
CN304
R355
R353
2SC2412K
1k
1k
6P
47
22
25V
470
47
47
2SC2412K
1000
10V
2SD2396K
4P
220
220
2SD2396K
2P
2.2
0.33
0.33
0.33
0.33
2.2
1
220
220
10V
220
100
10V
1000
p
33k
100
10V
10
0
10V
100
10V
10V
BA5417
1k
10k
15k
4.7
50V
50V
0.047
47k
2.2k
2.2k
1000p
1000p
4.7
50V
100
16V
0.33
2.2
0.33
4.7
50V
50V
4.7
50V
50V
6800p
10k
10k
6800p
0
LA4601N
2SC2412K
0.33
0.33
2.2
0.47
1k
1k
1000
10V
47
35V
0.01
0.47
50V
1SS120-RX
100k
100k
1SS120-RX
100
4.7
16V
16V
100k
10 50V
1SS120-RX
1SS120-RX
0.01
RL202-M11
RL202-M11
0.01
0.01
RL202-M11
RL202-M11
0.01
0.01
0.01
MTZJ-77-5.6A
220
10V
10V
1k
0.01
0.01
470
6.3V
MTZJ-T-77
-6.8A
220
10V
10V
2SD2396K
470
470
2SC2412K
10k
10k
2SC2412K
10k
10k
2SC2412K
1k
10k
DTA124EKA
0.47
0.47
4.7k
0.47
680
1.5k
1k
1k
DTA124EKA
10k
1
50V
DAN202K
DAN202K
DTA124EKA
1
2SD2396K
1
47k
470
2SB1424-T100-R
1SS355-TE-17
470
6.3V
0.01
0.01
0.01
6800
16V
10P
10P
10k
47k
VOL IN
VOL OUT
R CH
GND
L CH
5V
VT
GND
BASS ON
POWER ON
V MUTE
CD ON
BUZZER
AC IN
CD 5V
CD GND
CD 6V
CD GND
AC IN
B OUT
B IN
R
L
G
SW
BASS +
BASS -
SPEAKER
L-CH FRONT
SPEAKER
SPEAKER
MEGA BASS
R-CH FRONT
(HEADPHONE)
SPEAKER ON
SWITCH
SPEAKER ON
SWITCH
Q150,250
POWER AMP
HEADPHONE
Q354,355
SPEAKER
SWITCH DRIVE
IN1
G
N
D
IN
2
STAN
D
B
Y
P.P
.
FILTE
R
V
CC
O
U
T2
G
N
D
O
U
T1
POWER AMP
FOR MEGA BASS
SPEAKER
GND
GND
PRE
PRE
L.F
SW
GND
POWER
VCC
NC
Q352
HEADPHONE MUTE DRIVE
SPEAKER
SWITCH MUTE
MUTE DRIVE
POWER ON
Q350,351
VOICE MUTE
+5V
REGULATOR
REGULATOR
+6V
Q903
CD B+ SWITCH
POWER
TRANSFORMER
D901,902
RECT
RECT
D903,904
RECT
D905-908
T3.15A/250V
FOR FRONT SPEAKER/
MUTE
HEADPHONE
µ
GND
µ
5V
10
µ
H
10
µ
H
4.7
µ
H
(Page 5)
(Page 5)
The components identified by mark
0
or dotted
line with mark
0
are critical for safety.
Replace only with part number specified.
ICF-CD873L
8
SP201
SP101
5
6
8
9
10
11
20
13
14
15
16
17
2
3
4
1
12
#4
#3
#3
main board
section
section
lower cabinet
section
section
#3
#3
#6
#6
#1
#1
#2
#3
#3
#3
#1
18
7
19
21
A
A
(1)
UPPER CABINET SECTION
The components identified by
mark
mark
! or dotted line with mark
! are critical for safety.
Replace only with part number
specified.
specified.
• Items marked “*” are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering
these items.
delay should be anticipated when ordering
these items.
• The mechanical parts with no reference num-
ber in the exploded views are not supplied.
NOTE:
• -XX and -X mean standardized parts, so they
• -XX and -X mean standardized parts, so they
may have some difference from the original
one.
one.
• Color Indication of Appearance Parts
Example:
KNOB, BALANCE (WHITE) . . . (RED)
KNOB, BALANCE (WHITE) . . . (RED)
↑
↑
Parts Color Cabinet's Color
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
1
X-3377-171-1 NET ASSY (DARK BLUE)
1
X-3377-172-1 NET ASSY (RED) (AEP)
2
3-034-584-11 BUTTON (OPEN)
* 3
1-673-800-14 VOLUME BOARD
4
1-790-755-11 WIRE (FLAT TYPE) (7 CORE)
5
3-034-585-11 KNOB (VOL)
6
3-034-586-11 KNOB (MEGABASS)
7
X-3377-457-2 CABINET (UPPER) ASSY
8
3-034-589-01 WINDOW (CD)
9
3-034-579-13 LID, CD
10
3-034-592-01 SPRING (CD OPEN)
11
1-452-732-11 MAGNET
12
3-910-112-01 PLATE, CHUCKING
13
1-790-756-11 WIRE (FLAT TYPE) (10 CORE)
* 14
A-3663-291-A KEY BOARD, COMPLETE
15
3-034-581-02 CHASSIS (BUTTON)
16
3-351-377-11 DAMPER
17
3-034-588-21 WINDOW (CLOCK)
18
3-037-757-01 CUSHON (LID)
19
3-039-135-01 SHEET (WINDOW. CD), ADHESIVE
20
3-037-756-02 CUSHION (CHUCK)
21
3-038-420-02 SHIELD (KEY)
SP101
1-529-354-21 SPEAKER (6.6cm) (L ch)
SP201
1-529-354-21 SPEAKER (6.6cm) (R ch)
#1
7-685-546-19 SCREW +BTP 3X8 TYPE2 N-S
#2
7-685-903-31 SCREW +PTPWH 3X10 (TYPE2)
#3
7-685-649-79 SCREW +P 3X14 TYPE2 NON-SLIT
#4
7-685-133-19 SCREW +BTP 2.6X6 TYPE2 N-S
#5
7-621-255-15 SCREW +P 2X3
#6
7-685-547-19 SCREW +B 3X10
2.
EXPLODED VIEWS
Click on the first or last page to see other ICF-CD873L (serv.man2) service manuals if exist.