Sony ICF-CD843L Service Manual ▷ View online
ICF-CD843L
21
21
R54
R55
R56
R51
R52
R53
D53
D52
D54
BPF1
C53
C52
C51
X51
C55
C62
C24
R58
R61
C
60
C59
R60
C61
R62
C57
C58
C56
C64
R63
D51
C63
R57
IC51
CT1
D
2
D
3
C5
C1
C2
R2
C18
C25
C26
C27
R19
C28
C29
R101
C
10
1
R
20
1
C
20
1
C30
C31
R20
R14
C21
R15
C22
C13
C8
R8
R9
C14
C15
CT4
C19
R11
R13
RV1
R18
CF3
CF2
R16
C102
C202
R4
C33
R140
R240
R239
R139
C4
TP
TP
R
59
IC1
C20
R12
TP
TP
R17
T1
L1
L3
R6
R1
L2
R
3
C
3
C
F1
C17
C6
D5
R10
R5
C9
R7
L4
Q2
Q3
TP
CT2
CT3
ANT1
C12
C10
C11
2.2k
2.2k
2.2k
1k
1k
1k
1SS119
1SS119
1SS119
47p
100p
100p
75KHz
100p
12p
0.01
22
10k
470p
0.33
10k
12p
100k
22
25V
0.01
0.01
1000p
10k
MTZJ-T-77
-13A
47
35V
4.7k
LC72137M
10p
H
V
U
202A
TR
U
H
V
U
202A
TR
U
100p
1000p
1000p
100k
0.01
4.7
50V
50V
1
47
10V
22
0.01
47
10V
4.7k
0.0
22
4.7k
0.0
22
0.01
1
220k
220k
0.47
2.2k
4.7
50V
50V
0.01
470p
100k
3.3k
330p
5p
50p
2.2
50V
50V
100
10k
22k
330
10.7MHz
450KHz
470
1
1
1k
220p
220k
220k
470k
470k
3p
(FM IN)
(RADIO B+)
10k
CXA1238N
100
10V
10V
100
(GND)
(FM ST)
2.2k
1M
100k
82nH
4
.7k
10p
10
.7
M
H
z
100 10V
100p
KV1563
1M
10k
0.01
1M
2SC3931
2SC3931
(VT)
10p
50p
18p
330p
100p
A3
A5
A7
A1
A2
A6
A4
A8
IFIN
DQ
CL
DI
CE
102
101
BO3
BO2
BO1
AMIN
FMIN
VDD
PD
AIN
AOUT
XIN
XOUT
GND(D)
BO4
FE
GND
FM
RF
OUT
FM
OSC
AFC
AM
OSC
DISCRI
GND
RIPPLE
FIL
TER
OUT
AGC
IF
GND
AGC
FM
AM
BAND
MIX
PLL
LPF
REG
MPX
VCO
MUTE
REG
FM
ANT
AM
ANT
IFIN
IFIN
SW
TUNING
AFC(U)
AFC(L)
B+
OUT
LCH
RCH
ST
IND
PILOT
DET LPF
PILOT
DET LPF
PLL
LPF
ANTENNA
(2/2)
FM/AM PLL
FM/AM RF AMP,
MIX,OSC,
DET,MPX
FM/AM IF AMP,
AM IFT
FERRITE-ROD
ANTENNA
FM RF
-1
-2
L3-2
LW
FERRITE-ROD
ANTENNA
L3-1
MW
OSC
FM
AM OSC
SWITCH
LW
SWITCH
MW/LW
FM
LEAD WIRE
5-9. SCHEMATIC DIAGRAM – MAIN Section (2/2) –
(Page 20)
•
See page 24 for IC Block Diagrams.
•
See page 24 for Waveform.
ICF-CD843L
22
22
Q403
BC
E
Q401
BC
E
C453
C442
L403
R489
C448
R490
EC
B
Q404
R487
R488
C447
E
C
B
Q402
C441
R476
C424
C422
R475
R474
R473
R472
C420
R478
R479
R480
C427
R471
C418
C417
C416
C415
C414
C413
R465
L401
EC
B
Q405
R470
R469
R468
R467
R466
C411
R464
C452
C409
R463
C410
C407
C408
R462
R461
R457
R454
R458
R451
R459
R460
R455
R456
R449
R450
R452
R453
R448
C443
C444
R447
C445
C446
C449
R443
C404
R444
R497
C406
R446
R445
R442
IC401
L402
C432
C430
C429
C431
C434
C435
R485
C436
C455
R495
C438
C437
C457
C456
C450
JC401
C402
R402
R401
C401
R404
R403
R409
R408
C403
R406
R405
R410
R412
R414
R416
R418
R420
R422
R424
R426
R428
R430
R432
R434
R436
R438
R440
R411
R413
R415
R417
R419
R421
R423
R425
R427
R429
R431
R433
R435
R437
R439
R441
R618
R617
R616
R614
R613
R612
R611
R602
R606
R604
R603
R486
R610
R608
R607
JW421
JW422
CN401
20
19
2
1
JW406
JW407
JW408
JW409
D403
D402
JW420
1
7
1
2
C405
+
JW410
JW411
JW412
JW413
JW414
JW415
JW416
JW417
S609
S608
S607
S605
S604
S603
S602
1
2
CN402
X401
IC402
C433
+
C439
+
JW401
JW402
JW403
JW404
JW418
JW419
LCD401
LIQUID CRYSTAL DISPLAY
LCD BOARD
(12)
12
1-684-043-
R601
S601
BRIGHTNESS
NAP
CD PLAY MODE
CLOCK
D. S. T.
SUMMER T.
1
80
20
21
40
41
60
61
1
3
S606
SLEEP
CD
RADIO
BAND
OFF
ALARM RESET
B
MAIN BOARD
CN301
R636
R643
R642
R638
R637
R640
R641
R634
R633
R632
R631
S616
S619
S620
S618
S621
S617
D601
D603
1
7
D602
ALARM BOARD
(12)
12
1-684-045-
TUNE/TIME SET
−
TUNE/TIME SET
+
BUZZER
ALARM SET
RADIO
ALARM SET
BUZZER
CD
ALARM SET
CD
ALARM
MODE
R645
R644
R647
R646
R649
R648
R651
R650
R653
R652
R654
R655
D604
D605
D606
D607
D609
1
2
D608
(12)
1-684-044-
LED BOARD
D604
−
609
(LCD BACK LIGHT)
R619
R620
R621
R622
C601
R630
R624
R623
R626
R627
R628
1
2
PRESET BOARD
(12)
1-684-046-
S610
S611
S612
S613
5
4
3
2
PRESET TUNING
SELECT/PRESET
SELECT/PRESET
SNOOZE
DATE/SLEEP OFF
S615
S614
1
A
B
C
D
E
F
G
H
I
1
2
3
4
5
6
7
8
9
10
11
12
13
J
X402
1
32
12
12
R491
R492
R493
R494
5-10. PRINTED WIRING BOARDS – PANEL Section –
•
See page 15 for Circuit Boards Location.
:Uses unleaded solder.
(Page 18)
Ref. No. Location
D402
F-10
D403
E-10
D601
D-12
D602
C-12
D603
B-12
D604
F-12
D605
G-12
D606
H-12
D607
H-12
D608
I-12
D609
J-12
IC401
E-7
IC402
C-8
Q401
C-10
Q402
G-10
Q403
C-10
Q404
G-10
Q405
G-8
•
Semiconductor
Location
Location
ICF-CD843L
23
23
5-11. SCHEMATIC DIAGRAM – PANEL Section –
R448
R
410
R
411
R413
R
412
R
414
R
415
R416
R
417
R
418
R419
R
420
R421
R
422
R
423
R424
R425
R426
R427
R428
R429
R430
R431
R432
R433
R434
R435
R436
R437
R438
R439
R440
R441
R462
R
463
R
464
R
466
R
467
R
468
R
470
R469
R
461
R
471
R
472
R
473
R454
R457 R458
C452
C445
C446
R
459
R460
R
456
R
455
S601
S602
S603
S604
S605
BP602
S606
S607
S608
S609
R611
R612
R613
R614
R616
R617
R618
R447
R607
R603
R601
R602
R604
R606
R608
R610
C408
C409
C
413
C
414
C415
C416
C
417
C418
C420
C
422
C411
C406
C407
D402
R475
R474
Q403
Q401
C447
C448
R491
R492
R
493
R494
R
453
R
452
R
450
R
449
C
405
C449
C404
C444
C443
R446
R445
R443
C
457
C456
C
455
C433
C436
C435
C434
C431
R480
R479
R478
R489
R487
R406
R404
R641
R642
R643
R405
S618
S617
S619
S620
S621
R640
R490
R488
Q402
CN402
BP603
BP604
S610
S611
S612
S613
S614
S615
C601
R619
R620
R621
R622
R623
R624
R627
R626
R628
R630
IC402
D403
R451
CN401
L401 100
µ
H
BP601
R654
R655
R653
R652
R651
R650
R649
R648
R647
R646
R645
R644
R495
R485
R476
Q405
R442
LCD401
BP605
S616
R631
R633
R637
R632
R634
R636
R638
D602
D601
D603
JC401
R408
R409
X401
C429
C432
L403
C
410
C424
C430
X402
Q404
C453
R497
R
444
IC401
C427
D609
D608
D607
D606
D605
D604
R402
R401
C401
R403
C402
C403
C439
C441
C442
C438
C437
100
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
10k
47
47
47
10k
1k
0
1k
0
1k
100
100
10k
1
0.01
0.01
220k
100k
100k
220k
220k
100k
100k
47k
22k
47k
22k
1k
47k
100k
220k
100k
47k
22k
22k
10k
0.01
100p
100p
100p
47p
100p
100p
1000p
0.01
0.01
2200p
100p
0.01
1SS119
1k
1k
DTA144EUA
-T106
DTA144EUA
-T106
1
1
220
100
1k
470
100k
220k
100k
220k
100
10V
2.2
0.01
0.01
0.01
100k
220k
10k
0.22
0.22
0.22
100
10V
10V
0.01
47p
47p
0.1
1k
1k
1k
2.2k
2.2k
22k
22k
220
220
220
47k
10k
100k
100k
2SD596
2P
0.01
470k
220k
220k
100k
100k
47k
47k
22k
22k
10k
PST600L-T
1SS119
100
20P
470
100
100
470
100
470
100
470
100
470
100
470
470k
10k
47k
2SC4081-T106
220k
220k
100k
47k
100k
47k
22k
22k
TOL-31CSGAKAA
-KS01
TOL-31CSGAKAA
-KS01
TOL-31CSGAKAA
-KS01
0
22k
10k
32.768KHz
22p
2.2
L402
100
µ
H
0
100p
0.01
22p
4.19MHz
2SC4081
-T106
1
470k
220k
A12-8BT
µ
PD789477GC-
10K
TOL-30BUGBKAA
-K51-U5S
TOL-30BUGBKAA
-K51-U5S
TOL-30BUGBKAA
-K51-U5S
TOL-30BUGBKAA
-K51-U5S
TOL-30BUGBKAA
-K51-U5S
TOL-30BUGBKAA
-K51-U5S
47k
22k
0.1
47k
0.1
0.1
470
4V
0.1
0.1
0.1
0.01
AA1
AA2
AA3
AA4
AA5
AA6
AA7
AA8
AA9
AA10
AA11
AA12
AA13
AA14
AA15
AA16
AA17
AA1
AA2
AA3
AA4
AA5
AA6
AA7
AA8
AA9
AA10
AA11
AA12
AA13
AA14
AA15
AA16
AA17
BB1
BB2
BB3
BB6
BB7
BB8
BB9
BB10
BB11
BB12
BB13
BB13
BB12
BB11
BB10
BB9
BB8
BB7
BB6
BB5
BB3
BB2
BB1
BB4
BB4
BB14
BB15
BB14
BB15
BB5
AA18
AA19
AA20
AA21
AA22
AA23
AA24
AA25
AA26
AA27
AA28
AA29
AA30
AA31
AA32
AA18
AA19
AA20
AA21
AA22
AA23
AA24
AA25
AA26
AA27
AA28
AA29
AA30
AA31
AA32
SEG27
SEG
26
SEG25
SEG
24
SEG
23
SEG
22
SEG
21
SEG
20
SEG19
SEG
18
SEG
17
SEG16
SEG
15
SEG
14
SEG
13
SEG
12
SEG
11
SEG
10
SEG9
S
EG8
SEG
7
SEG
6
SEG
5
SEG
4
SEG
3
SE
G2
CO
M
3
CO
M
2
CO
M
1
CO
M
0
SEG1
SEG0
SEG27
SEG26
SEG25
SEG24
SEG23
SEG22
SEG21
SEG20
SEG19
SEG18
SEG17
SEG16
SEG15
SEG14
SEG13
SEG12
SEG11
SE
G10
SEG
9
S
EG8
SEG
7
SEG
6
S
EG
5
S
EG
4
S
EG
3
SEG
2
CO
M
3
CO
M
2
CO
M
1
CO
M
0
S
EG
1
S
EG
0
FS
EQ
N
C
KEY0
KEY1
KE
Y2
KEY3
A
VSS
CD
O
N
AC
IN
W
R
Q
BU
ZZER
M
U
TE
BU
ZZER
LA
T CD
/R
AD
IO
D
ATA
C
D
/R
AD
IO
CLK C
D
/R
AD
IO
D
A
T
A-IN
C
D
DR
F
XR
S
T
R
AD
IO
O
N
PO
W
ER
O
N
AVDD
CD OPEN
VERSION
BUZZER LED
RADIO LED
CD LED
NAP LED
RESET
X2
X1
TX2
TX1
IC
BACK LIGHT 1
BACK LIGHT 0
NC
NC
NC
HP ON
HP SW
A MUT
V
LC0
V
LC
1
VLC2
N
C
N
C
LIQUID CRYSTAL DISPLAY
2
1
2
1
D604-609
(LCD BACK LIGHT)
5
4
3
2
1
PRESET TUNING,SELECT/PRESET
1
2
SNOOZE
DATE/SLEEP OFF
ALARM SET
BUZZER
S617
TIME SET
TUNE/
-
S618
TUNE/TIME SET
+
ALARM SET
S619
CD
S620
ALARM
MODE
ALARM SET
S621
RADIO
RADIO
BUZZER
CD
1
7
1
7
Q401-404
LED DRIVE
RESET SIGNAL
GENERATOR
V
G
RST
VSS0
VDD0
SYSTEM CONTROLLER
MUTING
D.S.T
SUMMER T.
CLOCK
CD PLAY
MODE
NAP
BRIGHTNESS
SLEEP
CD
RADIO
BAND
OFF
ALARM RESET
(Page 20)
•
See page 24 for Waveforms.
•
See page 26 for IC Pin Function Description.
ICF-CD843L
24
24
Approx
850 mVp-p
850 mVp-p
Approx.
90 mVp-p
90 mVp-p
Approx.
60 mVp-p
60 mVp-p
29.5
µ
s
2.9 Vp-p
13.3
µ
s
1.8 Vp-p
30.4
µ
s
7.5 Vp-p
239 ns
2.6 Vp-p
•
Waveforms
– MAIN Board –
– LCD Board –
200 mV/DIV, 500 ns/DIV
200 mV/DIV, 500 ns/DIV
200 mV/DIV, 500 ns/DIV
1 V/DIV, 10
µ
s/DIV
– CD Board –
500 mV/DIV, 5
µ
s/DIV
2 V/DIV, 10
µ
s/DIV
1 V/DIV, 100 ns/DIV
IC701
4
(RF)
(CD PLAY mode)
2
IC701
qd
(FE)
(CD PLAY mode)
3
IC701
qg
(TE)
(CD PLAY mode)
4
IC701
rk
(XOUT)
(CD PLAY mode)
1
IC51
w;
(XOUT)
(TUNER mode)
qa
IC401
u;
(TX1)
ws
IC401
uf
(X1)
(CD PLAY mode)
wa
–
+
+
VCC
28
27
26
25
24
23
22
21
20
19
18
17
16
15
LEVEL
SHIFT
–
+
+
VCC
LEVEL
SHIFT
+
–
–
1
2
3
5
6
7
8
9 10
11
12
13 14
LEVEL
SHIFT
+
–
–
+
–
DRIVE
BUFFER
DRIVE
BUFFER
DRIVE
BUFFER
DRIVE
BUFFER
REGULATOR VOLTAGE DETECT,
BIAS VOLTAGE DETECT,
THERMAL SHUT DOWN
4
–
+
+
DRIVER
MUTING
GND
OUT4-B
OUT4-A
IN4
IN4'
VREFIN
VCC
VCC
IN3'
IN3
OUT3-A
OUT3-B
NC
OPIN-B
OUT1-B
OUT1-A
IN1
RESET
REG-B
REGOUT
MUTE
GND
IN2'
IN2
OUT2-A
OUT2-B
GND
OPOUT
LEVEL
SHIFT
AUDIO
OUT
+
–
+
–
+
–
+
–
–
+
–
–
+
–
–
+
–
–
PLL VCEC
CLV, CAV
CONTROL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
80
79
78 77 76 75 74 73
72 71 70
69 68
67
66
65 64 63 62 61
21 22 23 24
25
26
27
28 29 30
31 32
33
34
35
36 37 38 39 40
SLICE LEVEL
CONTROL
APC
LEVEL SET
MIX
EQ
AGC
LPF
TBAL
TBAL
+
BH
SW
PH
+
–
–
VREF
+
LPF
LPF
VREF
AUTO
ADJUST
MONITOR
CONTROL
CONTROL
JITTER
DETECT
A/D
S/H
D/A
SW
GENERAL-PURPOSE
PORTS
MONITOR SIGNAL SELECTOR
SERVO
PROCESSOR
SUBCODE
DECODE CRC
FRAME SYNC
DETECT,
PROTECT INSERT,
EFM DECODE
DRF
COMMAND INTERFACE
RUPTURE
DEFECT
TRACK
JUMP
INTERPOLATION
MUTE
ATTENUATION
DEEMPHASIS
LPF
1BIT DAC
8FS
DIGITAL FILTER
ERROR
CORRECTION
AUDIO CD
C1-2, C2-2
RAM
CLOCK
GENERATOR
EXTERNAL
AUDIO IN
SERIAL
OUT
LDD
LDS
FR
VVDD
PCKIST
VVSS
PDO2
PDO1
CONT1
CONT2
CONT3
VSS
VDD5
DRF
*
RES
*
WRQ
DO
DI
CL
CE
DATA
DATACK
LRSY
ASDFIN
ASDACK
ASLRCK
16MOUT
EFLG
C2F
XVSS
FSX/16MIN
XIN
XOUT
XVDD
RVDD
RCHO
RVSS
LVSS
LCHO
LVDD
TEST
BOUT
VDD
VSS
MONI5
MONI4
MONI3
MONI2
MONI1
FSEQ
V/
*
P
DEFECT
SBCK/FG
SBCK/CONT6
CONT5
CONT4
GPDAC
SLDO
SPDO
FDO
TDO
ADAVSS
ADAVDD
JITTC
RFMON
TE
TEC
FE
REF1
VREF
TIN2
TIN1
FIN2
FIN1
RFVSS
RFVDD
RF
EFMIN
SLCIST
SLCO
+
–
+
–
RAM
•
IC Block Diagrams
– CD Board –
IC701
LC78645NE-U
IC702
BA6998FP
Click on the first or last page to see other ICF-CD843L service manuals if exist.