SERVICE MANUAL

CDX-4250/4500
SERVICE MANUAL
US Model
Canadian Model
CDX-4250
E Model
CDX-4500
Photo: CDX-4250
SPECIFICATIONS
Model Name Using Similar Mechanism
CDX-4180
CD Drive Mechanism Type
MG-363X-121
Optical Pick-up Name
KSS-521A
FM/AM COMPACT DISC PLAYER
MICROFILM
–1–
SECTION 4
DIAGRAMS
4-1. IC PIN DESCRIPTION
• IC801 µPD17705GC-534-3B9 (SYSTEM CONTROL)
Pin No.
Pin Name
I/O
1
SIRCS
I
SIRCS input (A/D)
Pin Description
2
3
IN-SW
D-SW
I
I
CD mechanism position detection
CD mechanism position detection
4
5
SELF-SW
L-SW
I
I
CD mechanism position detection
LIMIT switch
6
7
LM-EJ
LM-LOD
O
O
Loading motor control (Eject direction)
Loading motor control (Loading direction)
8
9
AMP/ANT-ON
MONO
O
O
Power control for amplifier.
Force MONO output
10
11
SD
BAND-SW
I
I
SD signal input
Initialize switch input terminal
12
13
AREA1-SW
AREA2-SW
I
I
Initialize switch input terminal
Initialize switch input terminal
14, 15
16
RE1, 2
SEEK
I
O
Rotary encoder input 1, 2
SEEK output
17
18
CD-ON
FM-ON
I/O
I/O
Servo drive power
FM select output
19
20
TU-ON
NC
I/O
—
AM select output
Not used.
21
22
GND3
KEYIN3
—
I
Ground
Not used (Connect to ground)
23, 24
25
26
KEYIN2, 1
ROT-IN
S-METER
I
I
I
A/D key input 2, 1
Rotary commander input
FM and AM common signal meter A/D conversion input
27
28
TEST-SW
AM-IFC
I
I
TEST mode select input
AM center frequency input
29
30
FM-IFC
VDD2
I
—
FM center frequency input
Power supply (+5 V)
31
32
VCOH-FM
VCOL-AM
I
I
33
34
GND2
NC
—
—
Ground
Not used.
35
36
EO1-PDOUT
TESTO
O
—
Error out output
Connect to ground
37
38
AM-ON(TU-ON)
FM-ON(FM/AM)
O
O
AM power output (AM select)
FM power output (FM select)
39
40
LCL/DX
BEEP
O
O
LOCAL/DX select (“H” : LOCAL, “L” : DX)
BEEP output
41
42
ACC-IN
SCOR
I
I
Accessory input
SUBQ data read request
43
44
MUTE
AMP-MUTE
O
O
System mute output
Power amplifier mute output
45
46
TEL-MUTE
NC
O
—
Telephone mute output
Fixed at “H” in this set.
47
48
VOL-CE
VOL-CLK
O
O
Electric volume chip select
Electric volume serial clock
49
50
VOL-DATA
EMPHO
O
O
Electric volume serial data
De-emphasis control output
51
52
PW-ON
MD-ON
O
O
System power control
Loading motor power
53
CD-ON
O
Servo drive power
Local oscillation frequency input (FM)
Local oscillation frequency input (AM)
– 19 –
Pin No.
54
Pin Name
ILL-ON
I/O
O
Pin Description
55
56
C.ALARM
NC
I
I
57
58
NC
LCD-CE
—
O
59
60
EZ-SEL
SENS
I
I
SHIFT + input
Information input from servo IC.
61
62
FOK
LD-ON
I
O
Focus OK input
Laser diode control
63
64
NC
[IN] ST/MONO
—
I/O
65
[OUT] MONO
LCD-CKO
O
LCD driver serial clock output
66
67
LCD-So
INH
O
O
LCD driver serial data output
INHbit output
68
69
SQ-CKo
CD-RST
O
O
Q data read serial clock output
Servo IC/DAC reset output
70
71
SQ-SI
CD-SO
I
O
Q data input
Serial data output to servo IC.
72
73
CD-LAT
CD-CKO
O
O
Data latch output to servo IC.
Serial clock output to servo IC.
74
75
VREF
GND1
—
—
Not used.
Ground
76
77
78
X-OUT
X-IN
BU-IN
—
I
I
Crystal oscillator connection (4.5 MHz)
Crystal oscillator connection (4.5 MHz)
Back-up detection
79
80
VDD1
RESET
—
I
Power supply (+5 V)
RESET input
Illumination output
Caution alarm select input (Used/Not used)
Not used (Connect to ground)
Fixed at “H” in this set.
LCD drive chip select output
Not used. (Connect to ground)
Used for both STEREO indicator display input and force MONO output. (FM)
– 20 –
CDX-4250/4500
4-4. SCHEMATIC DIAGRAM — CD MECHANISM SECTION — • Refer to page 22 for Waveforms and Note and page 37 for IC Block Diagrams.
(Page
33)
– 25 –
– 26 –
CDX-4250/4500
4-5. PRINTED WIRING BOARD — DISPLAY SECTION —
• Semiconductor Location
Ref. No. Location
Ref. No.
(D551)
B-10
D566
(D552)
B-10
D567
(D554)
B-11
D568
D561
B-11
D569
D562
A-13
D570
D563
B-13
D571
D564
C-5
D572
D565
C-4
D573
(
Location
A-4
C-2
C-9
C-8
C-7
C-12
C-11
C-3
Ref. No.
D574
D575
D576
D577
D578
Location
C-2
B-3
A-2
B-1
A-1
(IC551)
B-7
Note:
®
•
: Through hole.
• b : Pattern from the side which enables seeing.
(The other layer’s patterns are not indicated.)
Caution:
Pattern face side:
(Side B)
Parts face side:
(Side A)
Parts on the pattern face side seen from the
pattern face are indicated.
Parts on the parts face side seen from the
parts face are indicated.
) : SIDE B
– 27 –
– 28 –
CDX-4250/4500
4-6. SCHEMATIC DIAGRAM — DISPLAY SECTION —
(Page 36)
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and 1/4 W or less unless otherwise
specified.
• U : B+ Line.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from ACC and BATT cords.
– 29 –
• C : panel designation.
• Voltage is dc with respect to ground under no-signal
(detuned) condition.
no mark : FM
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production
tolerances.
– 30 –
CDX-4250/4500
4-8. SCHEMATIC DIAGRAM — MAIN SECTION (1/2) —
(Page 26)
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and 1/4 W or less unless otherwise
specified.
¢
•
: internal component.
• C : panel designation.
• U : B+ Line.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from ACC and BATT cords.
• Voltage is dc with respect to ground under no-signal
(detuned) condition.
no mark : FM
(
) : AM
<
> : CD PLAY
: Impossible to measure
∗
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production
tolerances.
• Signal path.
F : FM
f : AM
J : CD
• Abbreviation
CND : Canadian model.
– 33 –
– 34 –
CDX-4250/4500
4-8. SCHEMATIC DIAGRAM — MAIN SECTION (2/2) —
• Refer to page 39 for IC Block Diagrams.
CDX-4250
(Page 29)
– 35 –
– 36 –
• IC Block Diagrams
SEIN
CLOK
XLAT
VDD
XLTO
DATO
CNIN
XLON
SPOD
SPOC
SPOB
SPOA
CLKO
IC1 CXD2507AQ
64 63 62 61 60 59 58 57 56 55 54 53 52
1
MON
MDP
MDS
LOCK
TEST
2
3
4
5
6
FILO
7
FILI
PCO
VSS
AVSS
CLTV
AVDD
8
9
10
11
12
13
RF
BIAS
ASYI
ASYO
ASYE
14
15
16
17
18
SERVO AUTO
SEQUENCER
SUB CODE
PROCESSOR
CPU
INTERFACE
14
51
50
49
48
47
46
45
44
43
42
41
40
5
DIGITAL
CLV
4
EFM
DEMODULATOR
DIGITAL
PLL
DATA
XRST
SENS
MUTE
SQCK
SQSO
EXCK
SBSO
SCOR
VSS
WFCK
EMPH
3
ASYMMETRY
CORRECTOR
D/A
INTERFACE
5
ERROR
CORRECTOR
16K
RAM
DIGITAL
OUT
39 DOUT
38
37
36
35
34
CLOCK
GENERATOR
FOK
6
3
C4M
FSTT
XTSL
XTAO
XTAI
33 MNTO
WDCK 19
GTOP
XUGF
XPCK
VDD
GFS
RFCK
C2PO
XROF
MNT3
MNT1
LRCK
PCMD
BCLK
20 21 22 23 24 25 26 27 28 29 30 31 32
OP IN –
OP IN +
VREF
CH3
CH3-IN
CH2
CH2-IN
VCC
CH1
CH1-IN
CH1 +
CH1 –
CH2 +
CH2 –
IC3 BA6796FP-T1
28
27
26
25
24
23
22
21
20
19
18
17
16
15
LEVEL
SHIFT
VCC
LEVEL
SHIFT
DRIVE
BUFFER
DRIVE
BUFFER
DRIVE
BUFFER
DRIVE
BUFFER
LEVEL
SHIFT
THERMAL
SHUT
DOWN
DRIVE
BUFFER
DRIVE
BUFFER
DRIVE
BUFFER
DRIVE
BUFFER
DRIVE
BUFFER
9
10
11
12
13
14
CH5 –
COM
CH4 +
CH3 +
CH3 –
LOGIC
GND
LEVEL
SHIFT
V/I
1
2
3
4
5
6
7
8
CTL1
CTL2
FWD
REV
TRAY
REV
CH4
FWD
CH4-IN
CTL2
OPOUT
CTL1
– 37 –
PHD 1
PHD
LD
RF M
RF O
RF I
CP
CB
CC1
36
35
34
33
32
31
30
29
28
27 26 25
FOK
CC2
PHD 2
IC2 CXA1782BQ
LEVEL S
FOK
APC
MIRR
RF IV AMP1
IIL
24
SENS
TTL
23
C.OUT
22
XRST
21
DATA
20
XLT
19
CLK
18
VCC
17
ISET
16
SL O
15
SL M
14
SL P
13
TA O
DFCT
TTL
RF IV AMP2
TTL
FE BIAS 37
IIL DATA REGISTER
INPUT SHIFT REGISTER
FE AMP
ADDRESS DECODER
F
IIL
IIL
OUTPUT DECODER
38
TOG1-3
BAL1-3
F IV AMP
E
39
EI
40
FS1-4
TG1-2
TM1-7
PS1-4
FZC COMP
E IV AMP
BAL 3
BAL2
BAL1
TE AMP
HPF COMP
VEE
TRACKING
PHASE
COMPENSATION
LPF COMP
ISET
41
TM6
TED 42
TOG3
TOG2
TOG1
TG1
TM5
TM4
TEI
TZC
TM3
44
ATSC 45
46
FCS PHASE
COMPENSATION
TZC COMP
LPFI 43
TM2
DFCT
WINDOW COMP
FS1
TM1
TM7
FS2
ATSC
TDFCT 47
F SET
6
7
8 9
10
11
12
TG2
FSET
TA M
– 38 –
TGU
FDFCT
5
SRCH
FEI
4
FE O
3
FE M
2
FLB
1
FGD
FS4
48
FEO
VC
TG2
DFCT
LVRIN
LCOM
LT1
LT2
LT3
LTOUT
LSIN
NC
NC
LSB1
LSB2
IC401 LC75374E
33
32
31 30
29
28 27 26 25 24
23
22 LFIN
+
–
+
–
34
35
36
37
38
+
–
–
+
+
–
21 LFOUT
+
–
20 LROUT
–
+
LSELO
L4
L3
L2
L1
–
+
19 VREF
VDD 39
–
+
R1
R2
R3
R4
RSELO
–
+
18 CE
17 DI
16 CL
15
VSS
14 RROUT
–
+
13 RFOUT
CONTROL
–
+
40
41
42
43
44
DECODER
SHIFT
REGISTER
LATCH
+
–
–
+
+
–
–
+
5
RCOM
RT1
RT2
RT3
6 7 8 9 10
11
RSB2
3 4
RTOUT
RSIN
NC
NC
RSB1
2
RVRIN
12 RFIN
1
IC402 TDA7384
DRIVER
DRIVER
1 2 3 4 5
6
7 8 9 10 11 12 13 14 15 16 17 18 19
20
21 22 23 24 25
VCC
OUT1–
GND
OUT1+
SVR
IN1
IN2
S-GND
IN4
IN3
AC-GND
OUT3+
GND
OUT3–
VCC
OUT4+
MUTE
OUT4–
GND
N.C.
DRIVER
TAB
GND
OUT2–
STNBY
OUT2+
DRIVER
– 39 –