Sony ICF-CD843V Service Manual ▷ View online
25
ICF-CD843V
11
10
9
8
7
6
5
4
3
2
1
12
13
14
15
19
20
UNLOCK
DETECTOR
POWER ON
RESET
UNIVERSAL
COUNTER
CCB
I/F
CE
DI
CL
DO
XOUT
AOUT
XIN
AIN
PD
VSS
VDD
FMIN
AMIN
B01
B02
B03
I01
I02
IFIN
PHASE
DETECTOR
CHARGE
PUMP
REFERENCE
DIVIDER
SWALLOW
COUNTER
1/16,1/17
4BITS
12BITS
PROGRAMMABLE
DIVIDER
DATA SHIFT REGISTER
LATCH
1/2
16
17
18 VSSA
+
–
12
13
14
19
15
TVIN
MREF
GRND
FMIB
IFCT
NC
FMIN
FMRO
OLAG
ARFI
REGV
TVRO
FTLO
BAND
TUNE
PLLO
FALC
COMP
37
38
39
40
AAGC
DETO
PLT2
MPXI
MPRM
V12M
MUTE
PLT1
PLL1
PLL2
MPX DECODER
AM BPF
PSN
1/X
FM/TV
LPF
PD
VCO
1/2
1/2
STID
14V
PLAP
TUNE
38kHz
STEREO AUDIO R
STEREO AUDIO L
19kHz
1.65V
1.25V
36
8 9
10
VCO
STID
MCNT
GRND
VCC
1
4
2
3
5
6
MPRG
LOUT
ROUT
DDCN
PLLI
7
+
–
+
–
35
34
FM DET
150kHz
FM LMT
OL DET
TV RF
AMP
FM RF
AMP
AM RF
AMP
45kHz
31
32
33
MUTE
AGC AMP
AM AGC
1.25V
AM/FM: 1/2
TV: 1/8
TV: 1/8
1.25V
18
17
16
FMBF
AMLO
AM OSC
FM/TV OSC
20
30
29
27
28
23
24
25
26
22 21
11
– MAIN Board –
IC1
CXA1960Q
IC51
LC72122V-TLM
IC302
BA5417
STANDBY
T.S.D.
BS
FILTER
PRE GND2
PRE GND1
NF2
IN2
IN1
NF1
FIL
TER
STBY
POWER GND
BS1
OUT1
VCC
OUT2
10
3 4 5
6
BS
BS2
2
NC
1
8
9
7
11 12
13
14 15
+
–
–
+
–
–
26
ICF-CD843V
LCD BOARD IC401
µ
PD789477GC-A19-8BT (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1, 2
NC
—
Not used
3 to 5
VLC0 to VLC2
—
Terminal for doubler circuit capacitor connection to develop liquid crystal display drive voltage
6 to 9
COM0 to COM3
O
Common drive signal output to the liquid crystal display
10 to 37
SEG0 to SEG27
O
Segment drive signal output to the liquid crystal display
38
AVDD
—
Power supply terminal (+3.3V) (analog system)
39
CD OPEN
I
CD lid open/close detection signal input terminal “L”: CD lid is closed, “H”: CD lid is opened
40
VERSION
I
Destination setting terminal
41
FSEQ
I
Synchronizing signal detection signal input from the digital signal processor
42
NC
—
Not used
43 to 46
KEY1 to KEY4
I
Key input terminal (A/D input)
47
AVSS
—
Ground terminal (analog system)
48
CD ON
O
Power on/off control signal output for the CD +3.3V power supply “L”: CD power on
49
AC IN
I
Power failure detection signal input terminal “L”: power failure, “H”: power on
50
WRQ
I
Interruption detection signal input from the digital signal processor
51
BUZZERMUTE
O
Buzzer sound muting on/off control signal output “H”: muting on
52
BUZZER
O
Buzzer sound drive signal output
53
LAT CD/RADIO
O
Chip enable signal output to the digital signal processor and FM/AM PLL
54
DATA CD/RADIO
O
Serial data output to the digital signal processor and FM/AM PLL
55
CLK CD/RADIO
O
Serial data transfer clock signal output to the digital signal processor and FM/AM PLL
56
DATA-IN CD
I
Serial data input from the digital signal processor
57
DRF
I
Focus on/off detection signal input from the digital signal processor
58
XRST
O
Reset signal output to the digital signal processor “L”: reset
59
RADIO ON
O
Power on/off control signal output for the radio +3.3V power supply “L”: radio power on
60
POWER ON
O
Power amplifier on/off control signal output “L”: standby mode, “H”: power amplifier on
61
A MUT
O
Audio line muting on/off control signal output “L”: muting on
62
HP SW
I
Connection detection signal input teminal of the headphone jack
“L”: headphone connected, “H”: no headphone Not used
“L”: headphone connected, “H”: no headphone Not used
63
HP ON
O
Headphone on/off control signal output terminal “L”: headphone on Not used
64 to 66
NC
—
Not used
67
BACK LIGHT 0
O
LED drive signal output of the liquid crystal display back light “L”: all LEDs on
68
BACK LIGHT 1
O
LED drive signal output of the liquid crystal display back light “L”: half LEDs on
69
IC
—
Internal connection terminal
70
TX1
I
Sub system clock input terminal (32.768 kHz)
71
TX2
O
Sub system clock output terminal (32.768 kHz)
72
VDD0
—
Power supply terminal (+3.3V)
73
VSS0
—
Ground terminal
74
X1
I
Main system clock input terminal (4.19 MHz)
75
X2
O
Main system clock output terminal (4.19 MHz)
76
RESET
I
System reset signal input “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
77
NAP LED
O
LED drive signal output terminal of the NAP “L”: LED on Not used
78
CD LED
O
LED drive signal output terminal of the CD “L”: LED on
79
RADIO LED
O
LED drive signal output terminal of the RADIO “L”: LED on
80
BUZZER LED
O
LED drive signal output terminal of the BUZZER “L”: LED on
•
IC Pin Function Description
27
ICF-CD843V
6-1. CABINET SECTION
SECTION 6
EXPLODED VIEWS
• 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.
• Accessories are given in the last of the elec-
trical parts list.
• Refer to “SERVICING NOTES” (page 3) for
original type and LIV type.
NOTE:
• -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
3-368-852-01 FOOT
* 2
1-684-037-12 PRESET BOARD
3
3-238-159-21 BUTTON (SNOOZE)
4
3-831-441-11 CUSHION (B)
5
X-3384-685-1 COVER ASSY
6
3-254-142-01 SCREW (B3), (+) BV TAPPING
7
3-253-143-01 SCREW (B2.6), (+) P TAPPING
8
3-254-143-11 SCREW (B3), (+) BV TAPPING
9
3-254-145-01 SCREW (B3), (+) BV TAPPING
The components identified by mark
0 or dotted line with mark 0 are
critical for safety.
Replace only with part number
specified.
critical for safety.
Replace only with part number
specified.
1
front cabinet section
upper cabinet section
rear cabinet section
4
7
7
2
6
3
5
7
8
7
7
9
9
28
ICF-CD843V
6-2. UPPER CABINET SECTION
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
51
3-922-112-31 DAMPER
52
3-238-155-31 CABINET (UPPER)
53
3-019-395-01 PLATE, CHUCKING
54
1-452-899-11 MAGNET
55
3-238-156-21 LID, CD
56
3-046-853-11 RUBBER, VIBRATION PROOF (GREEN)
57
3-046-853-01 RUBBER, VIBRATION PROOF (RED)
58
3-252-828-01 SCREW (B2.6), (+) PWH TAPPING
59
A-4542-998-A MAIN BOARD, COMPLETE
60
3-238-166-01 HOLDER (ANTENNA)
61
1-824-018-11 CABLE, FLEXIBLE FLAT (14 CORE)
62
3-238-173-01 SPRING (CD)
63
3-243-255-01 CUSHION (C)
64
3-243-253-01 CUSHION (A)
65
3-243-252-01 CUSHION (SP)
* 66
A-3347-089-A CD BOARD, COMPLETE
67
3-923-736-01 COVER, CD
68
1-757-689-11 CABLE, FLEXIBLE FLAT (16 CORE)
69
3-254-143-01 SCREW (B3), (+) BV TAPPING
70
3-253-143-01 SCREW (B2.6), (+) P TAPPING
71
3-243-249-01 SHEET (MAIN)
ANT1
1-501-907-61 ANTENNA, FM WIRE
L5
1-428-938-11 COIL, FERRITE-ROD ANTENNA (MW)
S302
1-692-960-11 SWITCH, PUSH (1 KEY)
(CD LID OPEN/CLOSE DETECT)
#1
7-685-853-04 SCREW +BVTT 2X6 (S)
51
52
53
70
54
55
56
B
B
A
A
S302
L5
ANT1
MAIN board
not supplied
Optical pick-up section
(KSM-213RDP)
(KSM-213RDP)
56
57
58
57
67
58
58
60
61
62
63
64
69
65
69
69
65
59
71
69
#1
68
66
Click on the first or last page to see other ICF-CD843V service manuals if exist.