Sony ICF-CD2000 / ICF-CD2000S Service Manual ▷ View online
– 21 –
SECTION 7
DIAGRAMS
7-1.
IC PIN FUNCTION DESCRIPTION
•
LCD BOARD IC401 LC867124A-5M74 (SYSTEM CONTROLLER, LCD DRIVER)
Pin No.
Pin Name
I/O
Description
1
SHOCK
O
C2 flag shock detection once danger signal output to the LC78626KE (IC502)
“L”: shock detection danger
“L”: shock detection danger
2
PAUSE
O
Pause signal output to the LC78626KE (IC502) “H”: pause
3
WOK
O
D-RAM writing enable signal output to the LC78626KE (IC502) “H”: writing enable
4
BUZ
O
Buzzer sound drive signal output terminal
5
CORES
O
External reset signal output to the CD control signal counter (IC404) and LC78626KE (IC502)
“L”: reset
“L”: reset
6
LMT
I
Sled limit-in detection switch (S603) input terminal
7
RES
I
System reset signal input from the reset signal generator (IC402) “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”
8
XT1/P74
I
Sub system clock input terminal (32.768 kHz)
9
XT2/P75
O
Sub system clock output terminal (32.768 kHz)
10
VSS1
—
Ground terminal
11
CF1
I
Main system clock input terminal (3 MHz)
12
CF2
O
Main system clock output terminal (3 MHz)
13
VDD1
—
Power supply terminal (+2.8V)
14
KEY1
I
Key input terminal (A/D input)
S402, S403, S421, S422, S424 (WORLD/LOCAL, D.S.T. SUMMER T., ESP, CD PLAY
MODE, CLOCK) keys input
S402, S403, S421, S422, S424 (WORLD/LOCAL, D.S.T. SUMMER T., ESP, CD PLAY
MODE, CLOCK) keys input
15
KEY2
I
Key input terminal (A/D input)
S711 to S715 (TUNE/SCAN TIME SET – ., ALARM TRACK/STATION, ALARM TIME,
ALARM MODE, BAND) keys input
S711 to S715 (TUNE/SCAN TIME SET – ., ALARM TRACK/STATION, ALARM TIME,
ALARM MODE, BAND) keys input
16
KEY3
I
Key input terminal (A/D input)
S706 to S710 (STATION zSELECT/zPRESET 1/2/3/4/5) keys input
S706 to S710 (STATION zSELECT/zPRESET 1/2/3/4/5) keys input
17
KEY4
I
Key input terminal (A/D input)
S701 to S705 (TUNE/SCAN TIME SET + >, SNOOZE SLEEP OFF/LIGHT, x OFF
ALARM RESET, RADIO SLEEP, CD u ) keys input
S701 to S705 (TUNE/SCAN TIME SET + >, SNOOZE SLEEP OFF/LIGHT, x OFF
ALARM RESET, RADIO SLEEP, CD u ) keys input
18
OPEN
I
CD door open/close detection switch (S423) input terminal
19
AFC
O
AFC control signal output to the CXA1111N (IC1) when FM reception
20
REG
I
Input of monitor signal of constant-voltage power supply generated form CXA1111N (IC1)
(A/D input)
(A/D input)
21
BATT
I
Battery voltage detection input terminal
22
EMPN
I
D-RAM low capacity alarm signal input from the LC78626KE (IC502) “L”: less capacity
23
CNTOK
I
Data connection point detect completion signal input from the LC78626KE (IC502)
“H”: detection completed (D-RAM writing starts)
“H”: detection completed (D-RAM writing starts)
24
OVR
I
D-RAM writing interruption signal input from the LC78626KE (IC502)
(RZP pulse signal input in case of overflow or shock)
(RZP pulse signal input in case of overflow or shock)
25
DRF
I
DRF (focusing detection) signal input from the LA9251M (IC501)
26
WRQ
I
Subcode Q output standby input from the LC78626KE (IC502)
27
C2F
I
C2 flag signal input from the LC78626KE (IC502)
28
AC IN
I
Power failure detection input terminal “L”: power on, “H”: power failure
29
SHIFT
O
Shift clock output of the main system clock (3 MHz) “H” active
30
BEEP MUTE
O
Beep sound muting on/off control signal output terminal “L”: muting on
31 to 40
S4 to S13
O
Segment drive signal output to the liquid crystal display (LCD401)
41
VDD3
—
Power supply terminal (+2.8V)
42
VSS3
—
Ground terminal
43 to 60
S14 to S31
O
Segment drive signal output to the liquid crystal display (LCD401)
– 22 –
Pin No.
Pin Name
I/O
Description
61
CE2
I
Setting terminal for the model Not used
62
CE3
I
Setting terminal for the model “L”: ICF-CD2000, “H”: ICF-CD2000S
63
J
I
Setting terminal for the model “H”: E, Singapore, Tourist model
64 to 67
COM0 to COM3
O
Common drive signal output to the liquid crystal display (LCD401)
68
VSS2
—
Ground terminal
69
VDD2
—
Power supply terminal (+2.8V)
70
CD ON
O
Power on/off control signal output for the CD mechanism section “L”: power on
71
TU ON
O
Power on/off control signal output for the tuner section “L”: power on
72
A MUT
O
Audio line muting on/off control signal output terminal “L”: muting on
73
LED ON
O
LED drive signal output of the liquid crystal display (LCD401) back light (D405 to D408)
indicator
indicator
74
SL –
O
Sled servo drive signal output to the LA9251M (IC501)
75
SL +
O
Sled servo drive signal output to the LA9251M (IC501)
76
RCK
O
Serial data latch pulse signal output to the CD control signal counter (IC404)
77
RWC
O
At tuner mode : PLL serial data latch pulse signal output to the FM/AM PLL (IC3)
At CD mode : Reading/writing control signal output to the LC78626KE (IC502)
(shumitt output)
At CD mode : Reading/writing control signal output to the LC78626KE (IC502)
(shumitt output)
78
COIN
I
At tuner mode : PLL serial data input from the FM/AM PLL (IC3)
At CD mode : Command serial data input from the LC78626KE (IC502)
At CD mode : Command serial data input from the LC78626KE (IC502)
79
SQOUT
O
At tuner mode : PLL serial data output to the FM/AM PLL (IC3)
At CD mode : Subcode Q data output to the LC78626KE (IC502)
At CD mode : Subcode Q data output to the LC78626KE (IC502)
80
CQCK
O
At tuner mode : PLL serial data transfer clock signal output to the FM/AM PLL (IC3)
At CD mode : Subcode Q data reading clock signal output to the LC78626KE (IC502)
At CD mode : Subcode Q data reading clock signal output to the LC78626KE (IC502)
ICF-CD2000/CD2000S
– 23 –
– 24 –
– 25 –
– 26 –
7-2.
BLOCK DIAGRAM – CD Section –
F
E
C
B
A
F
E
C
B
A
DETECTOR
PD
LD
LASER DIODE
1
2
3
4
63
62
15
2
AUTOMATIC
POWER CONTROL
Q601
FIN2
FIN1
E
F
I/V
PD
LD
LDS
LDD
APC
BAL
VCA
VCA
RF
DET
47
48
51
37
36
LATCH
RF
RF–
DEF
FSTA
EFBAL
LASER
HFL
DRF
TES
TJP
TGL
TOFF
TH
TA
38
44
52
TE–
6
TE
7
43
40
41
42
10
11
49
50
SLC
TRACKING
SERVO
&
TRACKING
LOGIC
SL–
29
SL+
30
SLEQ
27
33
TO
F/R
DRIVE
H
TRACKING
41
40
OUT2+
OUT2–
(TRACKING)
28
33
SLD
F/R
DRIVE
H
SLED
36
35
OUT4+
OUT4–
M601
(SLED)
IN2
17
1
FD
F/R
DRIVE
H
FOCUS
43
42
OUT1+
OUT1–
(FOCUS)
IN1
IN4
M
26
32
SPD
F/R
DRIVE
H
SPINDLE
38
37
OUT3+
OUT3–
M602
(SPINDLE)
IN3
M
SLED
SERVO
FA
19
FD–
18
FA–
20
FE
21
FE–
22
FOCUS
SERVO
SERVO
&
FOCUS
LOGIC
FILTER
SP8
35
CLV
45
SP
23
SPINDLE
SERVO
25
SP–
SERVO
SWITCH
Q507
SPINDLE
SWITCH
Q514
SPINDLE
SWITCH
Q503-1
FOCUS/TRACKING
COIL DRIVE
SPINDLE/SLED
MOTOR DRIVE
IC601(1/2)
13
TD
TRACKING
SWITCH
Q501-2
6
5
3
MUTING
Q506
SLOF
SLED
SWITCH
Q503-2
SLED
SWITCH
Q512
SLED
SERVO
Q509
SLC
SLI
RF
SWITCH
Q504
BUFFER
IC505
TRACKING
SWITCH
IC506 (1/2)
TRACKING
SWITCH
Q513
FOCUS
SWITCH
Q501-1
FOCUS
SWITCH
Q502-1
17
18
1
EFM
LEVEL
CONTROL
SYNC • DETECTOR
EFM DEMODULATOR
A/D PCM
ENCODER
DATA LIMIT
CONVERTER
A/D PCM
DECODER
DIGITAL
ATT.
SAMPLING/
DIGITAL FILTER
1BIT
DAC
L. P. F.
53
55
E
(Page 27)
F
(Page 27)
LCHO
RCHO
EFMO
EFMI
DEFI
TRACKING
SWITCH
Q505
34
35
SUB CODE
CONTROL
33
23
3
APC
CONTROL
24
27
26
25
SERVO
COMMANDER
CONT3/SBCK
CONT4/SFSY
CONT2
HFL
PDO
TES
JP+
TGL
TOFF
28
JP–
FSEQ
V/P
CLV+
CONT5/PW
RES
XOUT
XIN
COIN
30
36
69
CLV
DIGITAL
SERVO
22
20
2
7
B+
SPINDLE
SWITCH
Q502-2
B
(Page 29)
DRF
H
(Page 30)
SL+
I
(Page 30)
SL–
C
(Page 29)
CDRES
D504
D503
D514
59
60
63
CQCK
64
FMT
67
X501
16.9344MHz
TIMING
GENERATOR
10
SHIFT
REGISTER
11
SCLR
SCK
14
SI
1
6
2
3
5 7 4
SL MODE
T OFF
SL OFF
RFS
SP OFF
SP MODE
D MUTE
15
12
FMT
RCK
µ
COM
INTERFACE
65
66
77
76
75
74
80
62
46
79
SQ OUT
WRQ
PAUSE IN
WOK
CNTOK
OVF
SHOCK
RWC
C2F
EMPN
G
(Page 30)
RCK
A
(Page 29)
VZ
81 – 84
1, 2, 24, 25
89 – 93, 95 – 99
DRAM0 –
DRAM3
5, 9 – 12, 14 – 18
85
86
87
88
D-RAM
CONTROLLER
22
3
23
4
D-RAM
IC503
DQ1 – DQ4
A1 – A9
OE
WE
CAS
RAS
D
(Page 28)
28
20
27
23
17
15
14
9
START
S/S
VE
MUTE
APC DRV
ASP DRV
DNB-2
DNB-1
EXT DRV
APS/APC
CONTROL
IC601 (2/2)
STOP/START
SWITCH
Q610
APC
SWITCH
Q602
ASP
SWITCH
Q606
B+
SWITCH
Q606
B+
SWITCH
Q607
B+
SWITCH
Q608,609
B+
D601
B+
B+
J
(Page 30)
B+
B+
B+
SWITCH
Q604,605
B+
SWITCH
Q511
B+ (CD 3.4V)
B+
B+
TRACKING
SWITCH
IC506 (2/2)
RF AMP,
FOCUS/TRACKING/
SPINDLE/SLED/SERVO
IC501
DIGITAL SIGNAL PROCESSOR,
CLV SERVO, D/A CONVERTER,
D-RAM CONTROLLER
IC502
SQ OUT
WRQ
PAUSE
WOK
CNTOK
OVR
SHOCK
RWC
C2F
EMPN
COIN
CLOCK
L-CH
R-CH
COUNTER
IC404
OE
WE
CAS
RAS
OPTICAL PICK-UP
BLOCK
(DAX-11E)
K
(Page 28)
LMT
S603
(LIMIT)
AD0 – AD9
• SIGNAL PATH
: CD PLAY
LATCH
1
2-AXIS
DEVICE
ICF-CD2000/CD2000S
– 27 –
– 28 –
– 29 –
– 30 –
7-3.
BLOCK DIAGRAM – MAIN Section –
MUTING
Q103
ANT1
FM/SW TELESCOPIC ANTENNA
10
12
15
21
16
20
2
14
7
5
8
3
(CD2000)
(CD2000S)
(CD2000S)
(CD2000)
D3
D1
B. P. F
BPF1
D12
D13
D8
SW / MW
SWITCH
Q8
RF
AMP
Q1
D9-1
L8
SW
ANTENNA
CT1
CT2
L7
AM (MW)
FERRIRE-ROD
ANTENNA
D10
D9-2
L12
SW
OSC
AM (MW) TRACKING
CT2, L7
D5
RF
AMP
Q3
SW
TRACKING
CT1, L8
D6
AM
RF IN
AM
FRONT-END
FM OSC
FM RF
FM
RF IN
FM
FRONT-END
FM / AM
FE OUT
CF3
10.7MHz
FM / AM FRONT-END
IF DISCRI, IF AMP
IC1 (2 / 2)
T1
AM IF
CF2
450kHz
CF1
10.7MHz
FM / AM FRONT-END
IF DISCRI, IF AMP
IC1 (1/2)
CT3, L14
FM TRACKING
CT3
L14
FM RF
L15
5
10
7
8
9
9
4
3
2
1
2
1
13
20
19
18
17
16
6
11
12
L13
AM (MW) OSC
L13
MW
SWITCH
Q4
SW FREQUENCY
COVERAGE
L12
SW
SWITCH
Q2
AM (MW) FREQUENCY
COVERAGE
(CD2000)
MW
SWITCH
Q6
AM SOC
FM / AM PLL
IC3
FM IN
AM IN
SW / MW
PD
AIN
XIN
AOUT
12BITS
PROGRAM-
MABLE
DIVIDER
PHASE
DETECTOR
CHARGE
PUMP
DATA
SHIFT REGISTER
LATCH
X1
75kHz
XOUT
B04
REFERECE
DIVIDER
CCB
I / F
DO
CL
DI
CE
AM / FM
AM / FM
MO / ST
IF MUT
IF IN
DC / DC
CONVERTER
Q74-76,
T70
FM IF
DISCRI
DET OUT
6
18
13
FM
IF IN
FM DISCRI
METER
AM IF
DISCRI
FM / AM
SELECT
BAND
SELECT
AM IF OUT
REG OUT
PILOT
AFC / AGC1
RV2
1
8
Q9
MUTING
Q11
MUTING
MUTING
Q913
IN
SYNC •
DETECTOR
VCO
4
MPX
IC2
VCO
10
9
DECODER
LCH
OUT
OUT
RCH
OUT
OUT
RV1
FM VCO
B+ (CD3.4V)
TUNER
MUTE
Q311
K
D
R-CH
6
7
MIX AMP
IC302 (1 / 2)
TONE
AMP
IC301 (1 / 4),
IC302 (2 / 2),
IC303 (2 / 2),
IC302 (2 / 2),
IC303 (2 / 2),
Q101, 201, 104,
204, 305
B+
9
10
B+
MEGA BASS
S301
ON
OFF
4
30
BUZ
BEEP MUTE
64 – 67
31 – 40, 43 – 60
COM0 – COM3
S4 – S31
LCD401
(LIQUID CRYSTAL DISPLAY)
D405-408
(LCD BACK LIGHT)
73
LED DRIVE
Q403, 405,
Q403, 405,
411, 412
LED ON
KEY1 - KEY4
OPEN
LMT
LMT
WRQ
AFC
REG
REG
COIN
CQCK
SQOUT
RWC
D425 (2 /2)
D423 (2 /2)
D424 (2 /2)
D426 (2 /2)
PAUSE
WOK
CNTOK
OVR
XT1 / P74
C2F
EMPN
COIN
WRQ
COLK
SQOUT
RWC
PAUSE
WOK
CNTOK
OVR
SHOCK
C2F
EMPN
D425 (1 / 2)
D423 (1 / 2)
D424 (1 / 2)
D426 (1 / 2)
D424 (1 / 2)
D426 (1 / 2)
BEEP
MUTE
Q401
14 – 17
18
6
26
19
19
20
78 80 79 77
2 3
27 22
23 24 8
KEY MATRIX
S402, 403, 421,
422,424, 701-715
S423
OPEN
S401
(OPEN MAIN)
D434
X401
32.768kHz
CF1
11
CDRES
5
XT2 / P75
9
CF2
12
DRF
CDRES
DRF
VZ
25
C
B
A
X402
3MHz
3MHz
LEVEL
SHIFT
Q407, 408
MUTING
CONTROL
SWITCH
Q904
D409
29
70
CD ON
CD
ON SWITCH
Q410
71
TU ON
TUNER
ON SWITCH
Q404
72
A MUTE
21
BATT
28
AC IN
7
RES
1
SHOCK
74
SL-
75
SL+
76
RCK
AUDIO
MUTE
Q406
D433
3
2
RESET
SIGNAL
GENERATOR
IC403
SYSTEM CONTROLLER,
LCD DRIVER
IC401
6
5
7
LOW-PASS FILTER AMP
IC303 (1 / 2)
7
1
3
RV301
VOLUME
POWER AMP
IC101
HEADPHONE
SWITCH
Q312
R-CH
MUTING
Q102
J301
SP101
SPEAKER
L CH
SP102
SPEAKER
R CH
R-CH
BEEP
MUTE
Q310
B+
B+
8
IC301 (2 / 4)
B+
SWITCH
Q907
B+
SWITCH
Q908
B+
SWITCH
Q914
D905
D901
BUZZER
DRIVE
Q402, 415
B+
B+
B+
B+
MUTING
CONTROL
SWITCH
Q910
MUTING
CONTROL
SWITCH
Q909
MUTING
CONTROL
SWITCH
Q308, 309
D102
D428
(1 / 2)
B+
B+
B+
SWITCH
Q905, 912
B+
SWITCH
Q906
3
2
2
IC301 (3 / 4)
1
RCK
SL+
SL-
B+
J901
D904
D413
D402
D404
D403
B+
B+
B+
BATT
DET
Q413, 414
3
2
+3.3V REGULATOR
IC901
D401
D412
D420
D421
B+
(CD3.4V)
(CD3.4V)
BAT401
LITHIUM
BATTERY
3V
(FOR BACK-UP)
2
3
+3.4V REGULATOR
IC402
D427
D428 (2 / 2)
D429
D903
G
H
H
I
J
–
+
DC IN 6V
DRY BATTERY
SIZE "AA"
(IEC DISGNATION R6)
4PCS. 6V
14
13
12
12
IC301 (4 / 4)
B+
SWITCH
Q301
E
F
STEREO
DET
Q10
Q10
• SIGNAL PATH
: FM
: AM (MW)
: CD PLAY
05
SW
SWITCH
Q5
AM
IF IN
IF IN
FM AUTO
SCAN
SHIFT
(Page 26)
(Page 26)
(Page 23)
(Page 26)
(Page 26)
(Page 25) (Page 25)
(Page 26)
(Page 26)
(Page 25)
(Page 25)
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