1. business and industrial
2. metals

CDX-P656/X1N/UC
Service
Manual
ORDER NO.
CRT2317
MULTI-CD COMPACT DISC PLAYER
CDX-P656
CDX-P25
X1N/UC
X1N/EW
- See the separate manual CX-892(CRT2356) for the CD mechanism description, disassembly and circuit
description.
- The CD mechanism employed in this model is one of C7 series.
CONTENTS
1.
2.
3.
4.
5.
6.
SAFETY INFORMATION ............................................3
EXPLODED VIEWS AND PARTS LIST .......................4
SCHEMATIC DIAGRAM ...........................................12
PCB CONNECTION DIAGRAM ................................20
ELECTRICAL PARTS LIST ........................................26
ADJUSTMENT..........................................................29
7. GENERAL INFORMATION .......................................35
7.1 IC .........................................................................35
7.2 DIAGNOSIS ........................................................40
7.2.1 DISASSEMBLY .........................................40
7.2.2 TEST MODE ..............................................42
7.3 BLOCK DIAGRAM ..............................................48
8. OPERATIONS AND SPECIFICATIONS.....................50
PIONEER ELECTRONIC CORPORATION
4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan
PIONEER ELECTRONICS SERVICE INC. P.O.Box 1760, Long Beach, CA 90801-1760 U.S.A.
PIONEER ELECTRONIC [EUROPE] N.V. Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS ASIACENTRE PTE.LTD. 253 Alexandra Road, #04-01, Singapore 159936
C PIONEER ELECTRONIC CORPORATION 1999
K-ZZY. FEB. 1999 Printed in Japan
CDX-P656,P25
- CD Player Service Precautions
1. For pickup unit(CXX1285) handling, please refer
to"Disassembly"(See page 40). During replacement,
handling precautions shall be taken to prevent an
electrostatic discharge(protection by a short pin).
2. During disassembly, be sure to turn the power off
since an internal IC might be destroyed when a connector is plugged or unplugged.
3. Please checking the grating after changing the pickup
unit(see page 29) since these screws protects the
mechanism during transport, be sure to affix it when
it is transported for repair, etc.
Transportation of multi-CD Player
Seal
After removing the transport screw, cover the hole
with the supplied seal.
Transport screw
Attach to the original position before transporting the set.
A transport screw has been attached to the set in order to protect it
during transportation. After removing the transport screw, cover the
hole with the supplied seal. Be sure to remove the transport screw
before mounting the set. The removed transport screw should be
retained in the accessory bag for use the next time the set is transported.
2
CDX-P656,P25
1. SAFETY INFORMATION
1.1 CDX-P656/X1N/UC
CAUTION
This service manual is intended for qualified service technicians; it is not meant for the casual do-it-yourselfer.
Qualified technicians have the necessary test equipment and tools, and have been trained to properly and safely repair
complex products such as those covered by this manual.
Improperly performed repairs can adversely affect the safety and reliability of the product and may void the warranty.
If you are not qualified to perform the repair of this product properly and safely; you should not risk trying to do so
and refer the repair to a qualified service technician.
WARNING
This product contains lead in solder and certain electrical parts contain chemicals which are known to the state of
California to cause cancer, birth defects or other reproductive harm.
Health & Safety Code Section 25249.6 - Proposition 65
1.2 CDX-P25/X1N/EW
1. Safety Precautions for those who Service this Unit.
• Follow the adjustment steps (see pages 29 through 34)in the service manual when servicing this unit. When checking or adjusting the emitting power of the laser diode exercise caution in order to get safe, reliable results.
Caution:
1. During repair or tests, minimum distance of 13cm from the focus lens must be kept.
2. During repair or tests, do not view laser beam for 10 seconds or longer.
2. A “CLASS 1 LASER PRODUCT” label is affixed to the
rear of the player.
3. The triangular label is attached to the mechanism
unit frame.
4. Specifications of Laser Diode
Specifications of laser radiation fields to which human access is possible during service.
Wavelength
= 800 nanometers
3
CDX-P656,P25
2. EXPLODED VIEWS AND PARTS LIST
2.1 PACKING
16
4
5
6
2
3
1
15
20
13
7
14
12
21
19
11
11
8
12
10
9
4
CDX-P656,P25
NOTE:
- Parts marked by “*”are generally unavailable because they are not in our Master Spare Parts List.
- Screws adjacent to ∇ mark on the product are used for disassembly.
- PACKING SECTION PARTS LIST
Mark No.
1
2
*
3
4
5
*
6
7
8
9
10
11
12
13
14-1
14-2
CDX-P656/X1N/UC
CEA1962
CBA1295
CNM5158
HMB60P500FMC
HMF40P080FZK
Nut
Polyethylene Bag
Polyethylene Bag
Carton
Contain Box
NF60FMC
CEG1099
CEG1185
CHG3713
CHL3713
NF60FMC
CEG1099
CEG1042
CHG3715
CHL3715
Protector
Protector
Seal
Owner’s Manual
Owner’s Manual
CHP2133
CHP2134
CNM5599
CRD2887
Not used
CHP2133
CHP2134
CNM5599
CRD2893
CRD2894
CRY1070
CRP1201
CRP1205
CXB4027
CXB3591
CRY1087
CRP1203
CRP1205
CXB4027
CXB3591
CDE5831
CRP1090
CRP1195
CDE5830
CRP1090
CRP1195
* 14-3 Warranty Card
* 14-4 Caution Card
* 14-5 Caution Card
15 Magazine Assy
16 Angle Assy
*
*
17
18
19
20
21
Part No.
CDX-P25/X1N/EW
CEA1962
CBA1295
CNM5158
HMB60P500FMC
HMF40P080FZK
Description
Screw Assy
Screw
Polyethylene Sheet
Screw
Screw
•••••
•••••
Cord
Caution Card
Caution Card
- Owner’s Manual
Model
CDX-P656/X1N/UC
CDX-P25/X1N/EW
Part No.
CRD2887
CRD2893
CRD2894
Language
English, French
English, Italian, French
German, Dutch, Spanish
5
CDX-P656,P25
2.2 EXTERIOR
6
CDX-P656,P25
(1) EXTERIOR SECTION PARTS LIST
Mark No.
1
2
3
4
5
Description
Screw
Screw
Button
Screw
Spring
Part No.
BMZ26P040FMC
BMZ30P040FZK
CAC4632
CBA1460
CBH1859
6
7
8
9
10
Connector
Connector
Cord
•••••
•••••
CDE5525
CDE5783
See Contrast table(2)
11
12
13
14
15
Upper Case
Arm
Insulator
Panel
Damper
CNB2431
CNC8058
CNM6074
CNS5216
CNV5591
16
17
18
19
20
Power Unit
Screw
Plug(CN901)
Connector(CN921)
Connector(CN911)
CWX2299
BMZ26P060FMC
CKS-460
CKS3407
CKS4072
21
22
23
24
25
Holder
Holder
Lower Case Unit
Grille Unit
Screw
CNC8055
CNC8056
CXB3395
Mark No.
26
27
28
29
30
Description
Door
Door
Holder
Lever
Grille
Part No.
31
32
33
34
35
Screw
Angle Assy
CD Mechanism Module
Screw
Screw
HMF40P080FZK
CXB3591
Sheet
Transistor(Q910)
Seal
Double Faced Tape
Batch
See Contrast table(2)
*
*
36
37
38
39
40
*
41 Caution Card
See Contrast table(2)
See Contrast table(2)
CNC8139
See Contrast table(2)
See Contrast table(2)
See Contrast table(2)
IMS20P035FZK
IMS26P040FMC
2SD2396
CNM5599
See Contrast table(2)
See Contrast table(2)
CRP1195
See Contrast table(2)
BPZ20P080FMC
(2) CONTRAST TABLE
CDX-P656/X1N/UC and CDX-P25/X1N/EW are constructed the same except for the following:
Mark No.
8
24
26
27
29
*
*
30
33
36
39
40
Symbol and Description
Cord
Grille Unit
Door
Door
Lever
CDX-P656/X1N/UC
CDE5831
CXB4374
CAT2045
CAT2046
CNS5392
Part No.
CDX-P25/X1N/EW
CDE5830
CXB4383
CAT2013
CAT2014
CNS5391
Grille
CD Mechanism Module
Sheet
Double Faced Tape
Batch
CNS5290
CXK4805
Not used
CNM6211
CAH1680
CNS5292
CXK4800
CAH1682
Not used
Not used
7
CDX-P656,P25
2.3 CD MECHANISM MODULE
8
CDX-P656,P25
(1)CD MECHANISM MODULE SECTION PARTS LIST
Mark No.
1
2
3
4
5
Description
Connector
CD Core Unit(C7)
Connector(CN701)
Connector(CN101)
Screw
Part No.
CDE6069
Description
Spacer
Sheet
PCB
PCB
Ball
Part No.
CNM6146
CNM6296
CNP5227
CNP5228
CNR1189
6
7
8
9
10
Screw
Screw
Screw
Screw
Screw
CBA1037
CBA1041
CBA1176
CBA1362
CBA1387
51
52
53
54
55
Gear
Belt
Gear
Gear
Rail
CNR1531
CNT1086
CNV5472
CNV5473
CNV5474
11
12
13
14
15
Screw
Screw
Screw
Washer
Spring
CBA1470
CBA1476
CBA1486
CBF1038
CBH2172
56
57
58
59
60
Lever
Gear
Arm
Holder
Guide
CNV5475
CNV5477
CNV5478
CNV5480
CNV5481
16
17
18
19
20
Spring
Spring
Spring
Spring
Spring
CBH2173
CBH2174
CBH2175
CBH2285
CBH2177
61
62
63
64
65
Guide
Holder
Holder
Clamper
Gear
CNV5482
CNV5483
CNV5484
CNV5485
CNV5486
21
22
23
24
25
Spring
Spring
Spring
Short Pin
Volume(VR801)
CBH2178
CBL1390
CBL1392
CBL1239
CCW1023
66
67
68
69
70
Gear
Holder
Lighting Conductor
Mechanism PCB
Connector(CN801)
CNV5562
CNV5563
CNV5785
CWX2303
CKS1965
26
27
28
29
30
•••••
Shaft
Arm
Lever
Lever
CLA3304
CNC7901
CNC7902
CNC7904
71
72
73
74
75
Connector(CN802)
Damper Unit
Chassis Unit
•••••
Chassis Unit
CKS3486
CXA7714
CXB2850
31
32
33
34
35
Lever
Lever
Arm
Arm
Holder
CNC7905
CNC7906
CNC7908
CNC7909
CNC7911
76
77
78
79
80
Magazine Holder Unit
Frame Unit
Arm Unit
Screw Unit
•••••
CXB2853
CXB4426
CXB2855
CXB2857
36
37
38
39
40
Holder
Frame
Frame
Lever
Stopper
CNC7912
CNC7917
CNC7918
CNC7919
CNC7920
81
82
83
84
85
Motor Unit(M851)(SPINDLE) CXB3003
41
42
43
44
45
Frame
Bracket
Plate
Cover
Sheet
CNC7921
CNC8354
CNC8375
CNC8434
CNM6009
86
87
88
89
90
Motor Unit(M852)(ELV)
Screw
Lever Unit
•••••
Gear Unit
See Contrast table(2)
CKS1953
CKS2272
BMZ20P025FMC
Mark No.
46
47
48
49
50
CXB2851
CXB3004
Screw
JFZ20P025FMC
Motor Unit(M853)(TRAY) CXB4421
Screw
JFZ20P025FMC
Motor Unit(M854)(CARRIAGE)
CXB3006
JFZ20P025FMC
CXB3938
CXB4338
9
CDX-P656,P25
Mark No.
91
92
93
94
95
96
97
98
99
100
Description
Screw
Pickup Unit(Service)
•••••
•••••
Screw
Part No.
JGZ17P025FZK
CXX1285
Screw
Photo-transistor(Q851)
JFZ20P025FNI
PT4800
CSN1051
CN504-2
CSN1052
Spring Switch(S851,S853)
LED(D851)
Spring Switch(S852)
IMS26P040FMC
(2) CONTRAST TABLE
CDX-P656/X1N/UC and CDX-P25/X1N/EW are constructed the same except for the following:
Mark No. Symbol and Description
2 CD Core Unit(C7)
10
CDX-P656/X1N/UC
CWX2261
Part No.
CDX-P25/X1N/EW
CWX2260
CDX-P656,P25
2.4 MAGAZINE ASSY
- MAGAZINE ASSY SECTION PARTS LIST
Mark No.
1
2
3
Description
Magazine Assy
Label
Tray
Part No.
CXB4027
CRW1395
CNV5341
11
2
1
3
4
CDX-P656,P25
3. SCHEMATIC DIAGRAM
3.1 OVERALL CONNECTION DIAGRAM
A
Note: When ordering service parts, be sure to refer to “EXPLODED VIEWS AND PARTS LIST” or “ELECTRICAL
PARTS LIST”.
C
PICKUP UNIT(SERVICE)
CXX1285
10
12
1
CN801
CN802
MECHANISM
PCB
4
RF-A
DSP
B
6
8
M854
CXB3004
13
M851
CXB3003
21
CSN1051
D
PT4800
SWITCH PCB
CSN1051
CSN1052
CN504-2
C
M853
CXB3005
E
M852
CXB3006
MOTOR PCB
1k(B)
4CH SERVO DRIV
10k
D
12
A 1/2 C D E
1
2
MOT
3
4
5
7
6
8
CDX-P656,P25
A
A
3
CD CORE UNIT
10
11
12
9
UCmodel
RF-AMP,SERVO,
DSP,DAC
B
17
16
15
EW model
19 20
C
5
2
A 2/2
7
DRIVER
D
18
MOTOR DRIVER
5
6
7
A1/2
8
13
1
2
3
4
CDX-P656,P25
A
B
SYSTEM CONTROLLER
A 1/2
EWodel
D
14
A 2/2
1
2
3
4
UCmodel
C
5
6
7
8
CDX-P656,P25
A
B
LER
GGC1257
(SRM2B256SLTMX70)
SRAM
CN911
UCmodel
POWER UNIT
IP-BUS DRIVER
EWodel
C
B
D
5
6
7
A 2/2
8
15
CDX-P656,P25
Note:1. The encircled numbers denote measuring pointes in the circuit diagram.
2. Reference voltage
REFO:2.5V
- Waveforms
1 RFI
0.5V/div. 0.5µs/div.
Normal mode: play
1 CH1: RFI
1V/div. 0.5ms/div.
2 CH2: MIRR
5V/div.
Test mode: Tracking open
1 CH1: RFI
1V/div.
0.5ms/div.
2 CH2: MIRR 5V/div.
Normal mode: The defect part
passes 800µm
REFO →
REFO →
REFO →
REFO →
REFO →
3 CH1: FD
0.5V/div.
0.2s/div.
4 CH2: FOR
2V/div.
Test mode: No disc, Focus close
3 CH1: FD
0.5V/div.
0.2s/div.
5 CH2: FOK
2V/div.
Normal mode: Focus close
6 CH1: FE
0.5V/div.
1ms/div.
7 CH2: XSI
2V/div.
Normal mode: Focus close
REFO →
REFO →
REFO →
REFO →
REFO →
REFO →
8 CH1: TE
0.5V/div. 0.5ms/div.
9 CH2: TD
0.5V/div.
Test mode: 32 tracks jump (REV)
8 CH1: TE
0.5V/div. 0.5ms/div.
9 CH2: TD
0.5V/div.
Test mode: Single jump (REV)
GND →
8 CH1: TE
0.5V/div.
5ms/div.
9 CH2: TD
0.5V/div.
Test mode: 100 tracks jump (REV)
REFO →
REFO →
REFO →
REFO →
REFO →
REFO →
6 CH1: FE
0.1V/div.
3 CH2: FD
0.2V/div.
Normal mode: Play
20ms/div.
3 CH1: FD
0.5V/div. 0.5s/div.
0 CH2: MD
1V/div.
Normal mode: Focus close (12cm)
3 CH1: FD
0.5V/div. 0.5s/div.
0 CH2: MD
1V/div.
Normal mode: Focus close (8cm)
REFO →
REFO →
REFO →
REFO →
REFO →
REFO →
16
CDX-P656,P25
8 CH1: TE
0.2V/div.
9 CH2: TD
0.2V/div.
Normal mode: play
20ms/div.
REFO →
8 CH1: TE
0.5V/div.
5ms/div.
! CH2: SD
0.5V/div.
TEST mode:100Tracks jump(FWD)
0 MD
0.5V/div.
0.1s/div.
Normal mode: Play (12cm)
REFO →
REFO →
REFO →
0 MD
REFO →
1V/div.
10ms/div.
@ EFM
1V/div.
5µs/div.
Normal mode: Play
Long Search (12cm)
8 CH1: TE
1V/div.
2ms/div.
# CH2: TEC
1V/div.
Test mode: Focus close
Tracking open
REFO →
REFO →
REFO →
REFO →
GND →
8 CH1: TE
0.5V/div.
0.2s/div.
6 CH2: FE
0.5V/div.
Normal mode: AGC after focus close
% SCKO
2V/div.
1µs/div.
Normal mode: Play
^ DOUT
2V/div.
10µs/div.
Normal mode: Play
REFO →
REFO →
& LRCK
2V/div.
Normal mode: Play
20µs/div.
REFO →
REFO →
GND →
GND →
* VD
5V/div.
50ms/div.
Normal mode: No disc
GND →
REFO →
GND →
17
CDX-P656,P25
( CH1: R OUT 2V/div.
500µs/div.
) CH2: L OUT 2V/div.
Normal mode: Play (1kHz 0dB)
6 CH1: FE
0.2V/div.
1ms/div.
3 CH2: FD
0.5V/div.
Normal mode: During AGC
8 CH1: TE
0.2V/div.
1ms/div.
9 CH2: TD 0.5V/div.
Normal mode: During AGC
REFO →
REFO →
REFO →
REFO →
REFO →
REFO →
1 CH1: RFI
1V/div.
0.5ms/div.
⁄ CH2: HOLD 5V/div.
Normal mode: The defect part passes
800µm(B.D)
3 CH1: FD
1V/div.
0.5ms/div.
⁄ CH2: HOLD 5V/div.
Normal mode: The defect part passes
800µm(B.D)
9 CH1: TD
0.1V/div.
0.5ms/div.
⁄ CH2: HOLD 5V/div.
Normal mode: The defect part passes
800µm(B.D)
REFO →
REFO →
REFO →
REFO →
REFO →
REFO →
18
1
2
3
4
B
19
A
B
D
220000/5R5
8V REG.
HZS6L(B1)
C
1SR139-400
470/16
MUTE
470/16
B
CTH1047 1mH
1SR139-400
Yellow
3.2 POWER UNIT
A
CEK1018
CDX-P656,P25
2
1
3
4
2
1
3
4
1. The parts mounted on this PCB
include all necessary parts for
several destination.
For further information for
respective destinations, be sure
to check with the schematic diagram.
RERO
A
SIDE A
F
NOTE FOR PCB DIAGRAMS
M852
ELV
M
E
4.1 CD CORE UNIT
C
4. PCB CONNECTION DIAGRAM
CN801
CDX-P656,P25
EREF
EPVO
B
A
B
CN911
CD CORE UNIT
C
D
20
A
1
2
3
4
1
2
3
4
CDX-P656,P25
2. Viewpoint of PCB diagrams
Connector
SIDE B
Capacitor
SIDE A
A
Chip Part
SIDE B
B
MAG
C
EJECT
CD CORE UNIT
RESET
A
P.C.Board
D
1
2
3
A
4
21
2
1
3
4
CDX-P656,P25
4.2 POWER UNIT
A
SIDE A
B
POWER UNIT
CORD
IP-BUS
B
C
A
CN701
D
22
B
1
2
3
4
1
2
3
4
CDX-P656,P25
A
SIDE B
B
POWER UNIT
B
C
D
1
2
3
B
4
23
2
1
3
4
CDX-P656,P25
4.3 MECHANISM PCB
C
A
MECHANISM PCB
HOME
M851
SPDL
M
PICKUP UNIT
(SERVICE)
M854
CRG
M
B
A
CN101
E
D
4.4 SWITCH PCB
C
D
SWITCH PCB
DSP
TRP
D851
C
D
24
C D
1
2
3
4
1
2
3
4
CDX-P656,P25
4.5 MOTOR PCB
E
MOTOR PCB
A
C
B
C
D
1
2
3
E
4
25
CDX-P656,P25
5. ELECTRICAL PARTS LIST
NOTE:
- Parts whose parts numbers are omitted are subject to being not supplied.
- The part numbers shown below indicate chip components.
Chip Resistor
RS1/_S___J,RS1/__S___J
Chip Capacitor (except for CQS.....)
CKS....., CCS....., CSZS.....
=====Circuit Symbol and No.===Part Name
--- -----------------------------------------------
A
Part No.
-------------------------
Unit Number : CWX2261(CDX-P656/X1N/UC)
CWX2260(CDX-P25/X1N/EW)
Unit Name
: CD Core Unit
MISCELLANEOUS
=====Circuit Symbol and No.===Part Name
--- -----------------------------------------------
Part No.
-------------------------
R
R
R
R
R
259
260
298
301
302
RS1/16S102J
RS1/16S681J
RS1/16S681J
RS1/16S103J
RS1/16S153J
IC
IC
IC
IC
IC
201
202
301
302
501
IC
IC
IC
IC
IC(UC model)
UPD63710GC
BA05FP
BA5986FM
LB1836M
PD4501B
R
R
R
R
R
303
304
305
306
307
RS1/16S103J
RS1/16S153J
RS1/16S103J
RS1/16S752J
RS1/16S103J
IC
IC
IC
IC
IC
603
604
701
702
703
IC
IC
IC
IC (SRM2B256SLTMX70)
IC
BA4560F
BA4560F
PD5513A
GGC1257
HA12187FP
R
R
R
R
R
308
309
311
501
651
RS1/16S752J
RA4C332J
RS1/16S102J
RS1/16S102J
RSK1/16S153J
IC
IC
Q
Q
Q
704
705
101
701
770
IC
IC
Transistor
Transistor
Transistor
PAJ002A
TC7SH32FU
2SB1132
DTA144EK
2SB1184F5
R
R
R
R
R
652
653
654
659
660
RSK1/16S153J
RSK1/16S153J
RSK1/16S153J
RSK1/16S123J
RSK1/16S123J
Q
D
D
D
D
771
201
601
730
770
Transistor
Diode
Diode
Diode
Diode
2SC2412K
1SR154-400
UDZ7R5(B)
1SS356
1SS355
R
R
R
R
R
661
662
663
664
665
RSK1/16S123J
RSK1/16S123J
RSK1/16S103J
RSK1/16S103J
RSK1/16S103J
X
X
S
S
S
VR
202
701
801
802
803
802
Ceramic Resonator 16.93MHz
Ceramic Resonator 10.00MHz
Push Switch(EJECT)
Push Switch(RESET)
Spring Switch(MAG)
Semi-fixed 1kΩ(B)
CSS1456
CSS1476
CSG1076
CSG1076
CSN1044
CCP1338
R
R
R
R
R
666
669
670
671
672
RSK1/16S103J
RS1/16S101J
RS1/16S101J
RS1/16S752J
RS1/16S103J
R
R
R
R
R
673
701
702
703
704
RS1/16S271J
RS1/16S681J
RS1/16S102J
RS1/16S222J
RS1/16S104J
R
R
R
R
R
705
706
707
708
709
RS1/16S104J
RS1/16S222J
RS1/16S104J
RS1/16S0R0J
RS1/16S104J
R
R
R
R
R
710
713
715
716
717
RS1/16S473J
RS1/16S473J
RS1/16S473J
RS1/16S103J
RS1/16S473J
R
R
R
R
R
718
719
721
722
724
RS1/16S681J
RS1/16S0R0J
RS1/16S222J
RS1/16S222J
RS1/16S681J
R
R
R
R
R
725
726
727
729
730
RS1/16S222J
RS1/16S104J
RS1/16S513J
RS1/16S473J
RS1/16S473J
RESISTORS
R
R
R
R
R
101
102
103
201
202
R
R
R
R
R
205
206
207
208
212
RS1/16S103J
RS1/16S393J
RS1/16S182J
RS1/16S304J
RS1/16S0R0J
R
R
R
R
R
213
214
215
216
217
RS1/16S103J
RS1/16S103J
RS1/16S123J
RS1/16S273J
RS1/16S273J
R
R
R
R
R
253
254
256
257
258
RS1/16S681J
RS1/16S681J
RS1/16S681J
RS1/16S681J
RS1/16S681J
26
(EW model)
RS1/8S120J
RS1/8S100J
RS1/16S222J
RS1/16S104J
RS1/16S0R0J
(UC model)
(EW model)
CDX-P656,P25
=====Circuit Symbol and No.===Part Name
--- -----------------------------------------------
Part No.
-------------------------
=====Circuit Symbol and No.===Part Name
--- -----------------------------------------------
Part No.
-------------------------
R
R
R
R
R
731
732
733
734
735
RS1/16S222J
RS1/16S683J
RS1/16S222J
RS1/16S473J
RS1/16S222J
C
C
C
C
C
302
501
502
651
652
CKSQYB224K16
CKSQYB104K25
CKSRYB471K50
CCSRCH391J50
CCSRCH391J50
R
R
R
R
R
736
737
738
739
740
RS1/16S103J
RS1/16S433J
RS1/16S104J
RS1/8S2R0J
RS1/8S2R0J
C
C
C
C
C
653
654
655
656
661
CCSRCH181J50
CCSRCH181J50
CCSRCH181J50
CCSRCH181J50
CKSQYB104K25
R
R
R
R
R
741
742
743
744
745
RS1/16S102J
RS1/16S104J
RS1/16S104J
RS1/16S223J
RS1/16S104J
C
C
C
C
C
664
665
666
701
702
CKSRYB103K25
CEV470M6R3
CKSRYB103K25
CKSRYB103K25
CKSQYB473K16
R
R
R
R
R
747
750
751
752
753
RS1/16S472J
RA4C473J
RA4C473J
RN1/16SE3602D
RN1/16SE6801D
C
C
C
C
C
703
707
708
710
711
CKSQYB473K16
CKSRYB103K25
CKSQYB104K25
CKSRYB103K25
CKSRYB102K50
R
R
R
R
R
754
755
756
759
760
RS1/16S221J
RS1/16S104J
RS1/16S221J
RS1/16S472J
RS1/16S104J
C
C
C
C
C
712
714
715
717
718
CKSRYB102K50
CKSQYB104K25
CSZST220M16
CKSRYB103K25
CKSRYB103K25
R
R
R
R
R
761
764
801
802
804
RS1/16S104J
RS1/16S473J
RS1/10S221J
RS1/10S271J
RS1/16S562J
C
C
C
C
C
719
720
721
722
801
CKSRYB102K50
CKSRYB102K50
CKSRYB103K25
CKSRYB103K25
CKSRYB103K25
R
R
805
806
RS1/16S562J
RS1/16S102J
C
C
802
803
CKSQYB104K25
CKSRYB103K25
CAPACITORS
C
C
C
C
C
101
102
103
104
105
CKSRYB102K50
CKSQYB104K25
CEV101M6R3
CEV470M6R3
CKSQYB334K16
C
C
C
C
C
106
107
201
202
203
CKSQYB334K16
CKSQYB334K16
CKSQYB104K25
CEV101M6R3
CKSQYB104K25
C
C
C
C
C
204
205
206
207
208
CKSRYB332K50
CKSQYB104K25
CKSRYB392K50
CKSQYB224K16
CCSRCH270J50
C
C
C
C
C
209
210
211
212
213
CCSRCJ3R0C50
CCSRCH221J50
CCSRCH101J50
CKSRYB682K50
CKSQYB104K25
C
C
C
C
C
215
216
217
218
220
CKSQYB104K25
CKSQYB104K25
CKSQYB104K25
CKSQYB104K25
CKSQYB104K25
C
C
C
C
C
253
271
272
273
301
CKSRYB471K50
CEV101M6R3
CCH1300
CKSQYB334K16
CEV101M10
33µF/10V
B
(UC model)
(UC model)
Unit Number : CWX2299
Unit Name
: Power Unit
MISCELLANEOUS
Q
Q
Q
Q
Q
910
911
912
941
942
Transistor
Transistor
Transistor
Transistor
Transistor
2SD2396
IMD2A
IMX1
FMG12
IMD2A
D
D
D
D
L
901
902
910
941
901
Diode
Diode
Diode
Diode
Choke Coil 1mH
1SR139-400
1SR139-400
HZS6L(B1)
MA152WA
CTH1047
RESISTORS
R
R
R
R
R
901
902
910
911
912
RS1/10S204J
RS1/10S104J
RS1/8S431J
RS1/10S681J
RS1/8S101J
R
R
R
R
R
913
914
915
921
922
RS1/10S512J
RS1/10S132J
RD1/4PU151J
RS1/10S101J
RS1/10S101J
R
R
R
R
R
923
924
941
942
943
RS1/10S102J
RS1/10S473J
RS1/10S112J
RS1/10S112J
RS1/10S362J
R
R
944
945
RS1/10S362J
RS1/10S222J
27
CDX-P656,P25
=====Circuit Symbol and No.===Part Name
--- -----------------------------------------------
Part No.
-------------------------
CAPACITORS
C
C
C
C
C
901
902
903
904
906
C
C
C
C
C
910
911
912
913
941
CKSQYB103K50
CKSQYB103K50
CEJA220M10
CKSQYB103K50
CEJA330M10
C
942
CEJA330M10
C
Unit Number
Unit Name
Q
S
851
853
D
D
S
S
E
M
470µF/16V
470µF/16V
0.22F/5.5V
CKSQYB104K50
CCH1183
CKSQYB223K25
CCH1183
CCL1037
:
: Mechanism PCB
Photo-transistor
Spring Switch(HOME)
PT4800
CSN1051
Unit Number :
Unit Name
: Switch PCB
851
851
852
LED
Spring Switch(DSP)
Spring Switch(TAP)
CN504-2
CSN1051
CSN1052
Unit Number :
Unit Name
: Motor PCB
853
Motor(TRAY)
CXB3005
Miscellaneous Parts List
M
M
M
VR
28
851
852
854
801
Pickup Unit(P8)(Service)
Motor(SPINDLE)
Motor(ELV)
Motor(CARRIAGE)
Volume 10kΩ
CXX1285
CXB3003
CXB3006
CXB3004
CCW1023
CDX-P656,P25
6. ADJUSTMENT
6.1 CHECKING THE GRATING
- Checking the Grating After Changing the Pickup Unit
• Note :
CD mechanism modules the grating angle of the pickup unit cannot be adjusted after the pickup unit is changed.
The pickup unit in the CD mechanism module is adjusted on the production line to match the CD mechanism
module and is thus the best adjusted pickup unit for the CD mechanism module. Changing the pickup unit is thus
best considered as a last resort. However, if the pickup unit must be changed, the grating should be checked
using the procedure below.
• Purpose :
To check that the grating is within an acceptable range.
• Symptoms of Mal-adjustment :
If the grating is off by a large amount symptoms such as being unable to close tracking, being unable to perform
track search operations, or track searching taking a long time, may appear.
• Method :
• Measuring Equipment
• Measuring Points
• Disc
• Mode
• Oscilloscope, Two L.P.F.
• E, F, REFO
• ABEX TCD-784
• TEST MODE
CD CORE UNIT
E
E
100kΩ
390pF
F
REFO
L.P.F.
F
Xch
Ych
Oscilloscope
L.P.F.
100kΩ
390pF
• Checking Procedure
1. Enter Test mode, then select Multi-CD player and switch the 5V regulator on.
2. Using the TRK+ and TRK- buttons, move the pickup unit to the innermost track.
3. Press key 9 to close focus, the display should read "91". Press key 9 2 times. Enter Rough Servo mode. Press key
8 to implement the tracking balance adjustment the display should now read "81".
4. As shown in the diagram above, monitor the LPF outputs using the oscilloscope and check that the phase difference is within 75° . Refer to the photographs supplied to determine the phase angle.
5. If the phase difference is determined to be greater than 75° try changing the pickup unit to see if there is any
improvement. If, after trying this a number of times, the grating angle does not become less than 75° then the
mechanism should be judged to be at fault.
• Note
Because of eccentricity in the disc and a slight misalignment of the clamping center the grating waveform may be
seen to "wobble" ( the phase difference changes as the disc rotates). The angle specified above indicates the average angle.
• Hint
Change the disc changes the clamp position and may decrease the "wobble".
29
CDX-P656,P25
Grating waveform
30
Echt Xch 20mV/div, AC
Fcht Ych 20mV/div, AC
0˚
30˚
45˚
60˚
75˚
90˚
CDX-P656,P25
6.2 ADJUSTMENT OF ELEVATION WHEN THE CD CORE UNIT HAS BEEN REMOVED
FOR MAINTENANCE
- Adjustment When Error Code 60 is Displayed Because of Malfunctioning Elevation
• Note :
This mechanisms is detects the height of the stage using slide-variable resistance.
To absorb dislocation of the stage height caused by differences in the mechanism and the CD core unit, adjustment
must be made for each CD-mechanism module using a variable resistor.
Normally, readjustment is not needed, as this has been adjusted at the factory. However, adjustment of elevation is
required according to the procedure explained below if an elevation error has occurred or if the CD core unit has
been removed.
• Purpose :
To adjust and confirm whether or not elevation operates correctly.
• Adjustment Method :
• Measuring Equlpment: Oscilloscope, One L.P.F.
• Measuring Points :
EREF, EPVO
• Setting :
Without a magazine in Test mode
With the mechanism placed upside-down (Place the CD mechanism module so that the CD
core unit is above.)
CD CORE UNIT
Oscilloscope
L.P.F.
EREF
47kΩ
1µF
EPVO
• Confirmation Procedure
Examples of display
1. Enter Test mode, then select Multi-CD player.
TRACK
FUNCTION
'
"
2. Press key 7 to enter Mechanism Test mode.
TRACK
72
3. Press key 12 twice to specify the amount of movement.
FUNCTION
00' 00"
The amount of movement
changes each time key 12 is
pressed.
maximum movement
i
Key 12
i
during movement
Key 12
i
Key 12
i
minimum movement
i
TRACK
72
TRACK
72
TRACK
72
FUNCTION
00' 02"
FUNCTION
00' 01"
FUNCTION
00' 00"
31
i
CDX-P656,P25
Examples of display
4. Press key 9 to set ELV/TRAY mode to TRAY.
TRACK
72
FUNCTION
01' 02"
5. Press key FF to release the clamp and return the tray to the magazine.
Release the clamp
6. Press key 9 to enter Elevation Move mode.
TRACK
72
FUNCTION
00' 02"
7. Use key FF/REV to operate elevation and set if to the graduation of the third step
(Fig. 1).
8. Make the adjustment.
Use VR802 to adjust the difference in potential between EREF and EPVO to 0 ±10
mV.
9. When adjustment is completed, press key BAND to exit Mechanism Test mode.
TRACK
72
10. Confirm operation of the mechanism.
Place the mechanism horizontally (CD core unit below). Take care not to short-circuit the PCB.
TRACK
11. Confirm the height of the stage. Use the DISC± key to select Disc No.3.
TRACK
Check if the stopper bend of the clamp lever is engaged in the groove of the frame
stopper (Fig. 2-4).
FUNCTION
00' 02"
FUNCTION
'
04
"
FUNCTION
00' 00"
• Note :
The stopper bend will be pressed downward into the groove for final clamping. Confirm the engagement position
of the stopper bend.
• If the stopper bend is engaged in the center and pressed downward, adjustment is completed. Go to step 15.
• If the stopper bend is dislocated, check the amount of dislocation by following steps 12 to 14.
32
CDX-P656,P25
12. To see the amount of dislocation, place the mechanism upside-down.
If the stopper bend has been dislocated in the direction of the first
CD, turn VR802 to the left(Fig. 2).
To lower the stage toward the sixth step by 0.1 mm, reduce the voltage of EREF (adjusted in step 8) by 20 mV.
VR802
GND
EREF
If the stopper bend has been dislocated in the direction of the sixth
CD, turn VR802 to the right(Fig. 4).
To raise the stage toward the first step by 0.1 mm, increase the voltage of EREF (adjusted in step 8) by 20 mV.
47kΩ
L.P.F.
1µF
13. Place the mechanism horizontal. Go back to step 11 to reconfirm the
stage height.
14. When adjustment of the stage height is completed, proceed as follows:
Oscilloscope
15. Press the EJECT switch.
16. Once operation of the mechanism has stopped, turn the power OFF.
17. Wait more than one minute after the power is turned off, then turn the power ON and insert a magazine.
18. Check if the mechanism operates correctly with the first and fourth CDs.
19. If the mechanism operates properly, adjustment is completed. If the mechanism operates improperly, make the
adjustment again.
33
CDX-P656,P25
Stopper bend of the
clamp lever
Frame stopper
NG
Dislocated toward the first CD.
Fig. 2
6
4
3
2
1
E
Adjust the insertion gate of magazine to
the third scale.
Fig. 1
OK
Engaged in the center and pressed downward.
Fig. 3
NG
Dislocated toward the sixth CD.
Fig. 4
34
CDX-P656,P25
7. GENERAL INFORMATION
7.1 IC
- Pin Functions (UPD63710GC)
Pin No.
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
26
27
28
Pin Name
GND
HOLD
MIRR
FOK
rst
A0
stb
sck
SO
SI
VDD
DA.VDD
NC
DA.GND
NC
DA.VDD
R+
RLL+
X.VDD
xtal
XTAL
X.GND
VDD
EMPH
FLAG
I/O
I/O
I/O
O
I
I
I
I
O
I
O
O
O
O
O
I
O
O
29
30
31
32
33
34
DIN
DOUT
SCKIN
SCKO
LRCKIN
LRCK
I
O
I
O
I
O
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
WDCK
TX
GND
C16M
LIMIT
VDD
LOCK
RFCK
WFCK
PLCK
GND
C1D1
C1D2
C2D1
C2D2
C2D3
VDD
O
O
O
I
O
O
O
O
O
O
O
O
O
Function and Operation
Logic circuit GND
Defect detection output
MIRR output
RFOK signal output
Reset signal input
Command/parameter identification signal input
Data strobe signal input
Clock signal input for serial data input/output
Serial data and status signal output
Serial data input
Positive power supply terminal to logic circuit
Positive power supply terminal to D/A converter
Not used
D/A converter GND
Not used
Positive power supply terminal to D/A converter
Right channel audio data output
Right channel audio data output
Left channel audio data output
Left channel audio data output
Positive power supply terminal to crystal oscillation circuit
Crystal oscillator connect pin
Crystal oscillator connect pin
Crystal oscillation circuit GND
Positive power supply terminal to logic circuit
Output pin for the pre-emphasis data in the sub-Q code
Flag output pin to indicate that audio data currently being output consists
of noncorrectable data
Serial data input to internal DAC
Serial audio data output
Serial clock input to internal DAC
Audio data that is output from DOUT changes at rising edge of this clock
LRCK signal input to internal DAC
Signals to distinguish the right and left channels of the audio data output
from DOUT
Output double the frequency of LRCK
Digital audio interface data output
Logic circuit GND
Oscillator clock buffering output
Status of the pin is output at Bit 5 of the status output
Positive power supply terminal to logic circuit
EFM synchronous detection signal
Frame synchronous signal of XTAL-system
Frame synchronous signal of PLL-system
Monitor pin of bit clock
Logic circuit GND
Output pin for indicating the C1 error correction results
Output pin for indicating the C1 error correction results
Output pin for indicating the C2 error correction results
Output pin for indicating the C2 error correction results
Output pin for indicating the C2 error correction results
Positive power supply terminal to logic circuit
35
CDX-P656,P25
Pin No.
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
36
Pin Name
PACK
TSO
TSI
tsck
TSTB
GND
TEST
ATEST
RFMODE
A.GND
FD
TD
SD
MD
DACO
FBAL
TBAL
TEVCA
A.VDD
EFM
ASY
C3T
RFI
AGCO
AGCI
RFO
EQ2
EQ1
RFA.GND
A
C
B
D
F
E
A.VDD
REFOUT
FEFEO
TETEO
TE2
TEC
A.GND
PD
LD
PN
A.VDD
I/O
O
O
I
I
I
I
I/O
I
O
O
O
O
O
O
O
O
O
I
I
O
I
O
I
I
I
I
I
I
I
O
I
I/O
I
I/O
I/O
I
I
O
I
Function and Operation
CD-TEXT PACK synchronous signal
CD-TEXT data serial output
CD-TEXT control parameter serial input
CD-TEXT serial clock input
CD-TEXT parameter strobe signal input
Logic circuit GND
Test pin
Test pin
Use/not use select for internal RF amplifier
Analog circuit GND
Focus drive output
Tracking drive output
Sled drive output
Spindle drive output
DAC output for adjustment
DAC output for adjustment
DAC output for adjustment
DAC output for adjustment
Power supply terminal to analog circuit
EFM signal output
EFM comparator reference voltage input
3T detection capacitor additional pin
RF signal input for EFM data regulation
RF signal output of after gain adjustment
RF-AGC amplifier input
RF summing amplifier output
RF amplifier equalizer parts additional pin
RF amplifier equalizer parts additional pin
RF summing amplifier inverted input
Analog circuit GND
Photo detector A input
Photo detector C input
Photo detector B input
Photo detector D input
Photo detector F input
Photo detector E input
Positive power supply terminal to analog circuit
Reference electric potential output
Focus error amplifier inverted input
Focus error amplifier output
Tracking error amplifier inverted input
Tracking error amplifier output
Tracking error output of after amplification
Tracking comparator input
Analog circuit GND
PD detection signal input for LD output monitor
LD control current output
APC circuit control polarity set pin
Positive power supply terminal to analog circuit
CDX-P656,P25
IC's marked by* are MOS type.
Be careful in handling them because they are very
liable to be damaged by electrostatic induction.
1
25
20
*UPD63710GC
26
21
80
100
50
40
76
61
75
60
51
41
BA05FP
VCC
+
Reference
voltage
1
2
3
Vcc
GND
OUT
BA5986FM
OPOUT2 7
OPIN2(-) 6
OPIN2(+) 5
OPOUT1 4
OPIN1(-) 3
OPIN1(+) 2
BIAS IN 1
22 OPOUT3
23 OPIN3(-)
24 OPIN3(+)
25 OPOUT4
26 OPIN4(-)
27 OPIN4(+)
28 PreVcc
GND 8
MUTE 9
PowVcc 10
VO2(-) 11
VO2(+) 12
VO1(-) 13
VO1(+) 14
Mute
Level shift
Level shift
Level shift
Level shift
Stand-by
21 GND
20 STBY
19 PowVcc
18 VO3(-)
17 VO3(+)
16 VO4(-)
15 VO4(+)
37
CDX-P656,P25
- Pin Functions (PD5513A)
Pin No.
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
26
27,28
29
30
31,32
33
34
35
36
37
38
39–43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
38
Pin Name
NC
adena
TXTSTE
TXTSO
TXTSI
TXTSCK
BYTE
CNVSS
POWER
CONT
reset
XOUT
VSS
XIN
VCC
nmi
bsens
asens
TXTPACK
IPTA4IN
ippw
NC
CSEL
SRAMSW
CCS
NC
IPIN
IPOUT
NC
FMIPSW
testin
XSO
XSI
XSCK
M6M12
NC
rd
NC
wr
NC
cs
XA0
xstb
xrst
MIRR
LOCK
FOK
NC
A11
A9
A8
A13
A14
A12
VCC
A7
VSS
I/O
Format
O
O
O
I
O
I
I
O
O
I
O
C
C
C
C
C
C
I
I
I
I
I
I
O
C
I
I
O
C
I
O
C
I
I
O
I
O
I
NM
NM
O
C
O
C
O
O
O
O
I
I
I
C
C
C
I
O
O
O
O
O
C
C
C
C
C
O
C
Function and Operation
Not used
A/D reference voltage output
TEXT parameter output
TEXT control parameter serial output
TEXT data serial input
TEXT clock output
VCC joint
VSS joint
CD +5V control
Servo driver output control
Reset input
Crystal oscillating element connection pin
GND
Crystal oscillating element connection pin
VDD
Pull up
Back Up sense input
ACC power sense input
TEXT PACK interrupt input
IPIN joint
Power supply control output for IP BUS interface IC
Not used
Compression select
When there is SRAM,”H”
IP-BUS chip select
Not used
Data input from IP BUS interface IC
Data output for IP BUS interface IC
Not used
FM/IP BUS select switch
Test program mode input
LSI data output
LSI data input
LSI clock output
6/12 disc select input
Not used
SRAM enable output
Not used
SRAM write enable output
Not used
SRAM chip select
Control signal distinguishing data from microcomputer
CD LSI strobe output
CD LSI reset output
Mirror detector input
Spindle lock detector input
FOK signal input
Not used
Address BUS input
SRAM address bus output
SRAM address bus output
SRAM address bus output
SRAM address bus output
SRAM address bus output
VDD
SRAM address bus output
GND
CDX-P656,P25
Pin No.
65–68
69
70
71
72
73
74
75
77
78
79
80
81–88
89,90
91
92
93
94
95
96
97
98
99
100
Pin Name
A6-A3
A10
A2 & (EPSK)
A1 & (EPDI)
A0 & (EPDO)
NC
ejsw
mag
NC
I13
I2
I4
D0-D7
NC
DSP
disk
ELVPVO
ELVREF
TRP
AVSS
VDIN
VREF
AVCC
EPCS
I/O
O
O
O
O/I
O
Format
C
C
C
C
C
I
I
O
O
O
I/O
C
C
C
C
I
I
I
I
I
I
I
I/O
C
Function and Operation
SRAM address bus output
SRAM address bus output
SRAM address bus output and (E2PROM clock output)
SRAM address bus output and (E2PROM data input)
SRAM address bus output and (E2PROM data output)
Not used
Eject key switch interrupt input
Magazine lock switch interrupt input
Not used
Motor driver control output
Motor driver control output
Motor driver control output
SRAM data bus
Not used
DISC detect timing input
Disc detector input
Voltage input from ELV position sense
ELV reference voltage input
Tray position input
A/D GND
Power supply short sensor input
A/D converter reference voltage input
A/D VCC
E2PROM detect input , Chip select output
1
1
30
20
*PD5513A
50
40
81
61
80
60
100
80
51
41
31
21
Format
C
NM
Meaning
C MOS
Middle resistivity
N channel open drain
TC7SH32FU
1 IN B
5 VCC
2 IN A
3 GND
4 OUT Y
39
CDX-P656,P25
7.2 DIAGNOSIS
7.2.1 DISASSEMBLY
- Removing the Upper Case(not shown)
CD Mechanism Module
1. Remove the night screws.
2. Remove the Upper Case.
- Removing the CD Mechanism Module
Remove the four dampers(Fig.5).
Disconnect the connector(Fig.5).
Remove the two springs(Fig.5).
Fig.5
Disconnect the connector and then remove the
CD Mechanism Module(Fig.6).
- Removing the Grille Unit(not shown)
1. Press the two tabs indicated by arrows and then pull
out the Grille Unit.
Fig.6
- Removing the Power Unit(Fig.7)
Remove the two screws.
Remove the screw.
Remove the claw
and remove the Power Unit.
Power Unit
40
Fig.7
CDX-P656,P25
- Removing the Pickup Unit
1. Insert the short pin from the pickup unit in the flexible substrate.
2. Remove the flexible substrate from the connector.
3. Remove the flexible card from the connector.
4. Remove the lead wires to which the spindle motor and carriage motor assy were soldered.
5. Remove the two screws and lift the relay substrate up as shown in the figure on the upper right.
At this time, make sure that the flexible tray motor printed circuit board and flexible relay card are not pulled excessively.
Flexible card
Erect
Short Pin
Relay substrate
Flexible PCB (handle with care)
Flexible relay card (handle with care)
Fig.8
6. Remove screw A and then remove the carriage motor assy, lighting conductor, feed screw holder, feed screw and
belt (see Fig. 9).
7. Remove screw B on the main side and the pickup unit together with the guide shaft (see Fig. 9).
Screw A
Motor bracket
CRG motor
Feed screw
Lighting conductor
Screw A
Guide shaft (main)
Pickup unit
Guide shaft (sub)
Belt
Screw B
Feed screw holder
Fig.9
41
CDX-P656,P25
7.2.2 TEST MODE
- CD Test Mode
1) Precautions
• This unit uses a single power supply (+5V) for the regulator. The signal reference potential, therefore, is
connected to REFO(approx. 2.5V) instead of GND.
If REFO and GND are connected to each other by mistake during adjustments, not only will it be impossible to measure the potential correctly, but the servo
will malfunction and a severe shock will be applied to
the pick-up. To avoid this, take special note of the following.
Do not connect the negative probe of the measuring
equipment to REFO and GND together. It is especially
important not to connect the channel 1 negative
probe of the oscilloscope to REFO with the channel 2
negative probe connected to GND.
Since the frame of the measuring instrument is usually at the same potential as the negative probe, change
the frame of the measuring instrument to floating status.
If by accident REFO comes in contact with GND,
immediately switch the regulator or power OFF.
• Always make sure the regulator is OFF when connecting and disconnecting the various filters and wiring
required for measurements.
• Before proceeding to further adjustments and measurements after switching regulator ON, let the player
run for about one minute to allow the circuits to stabilize.
• Since the protective systems in the unit's software are
rendered inoperative in test mode, be very careful to
avoid mechanical and /or electrical shocks to the system when making adjustment.
• Disc detection during tray extraction and return operations is performed by means of the photo transistor
in this unit. Consequently, if the inside of the unit is
exposed to a strong light source with the outer casing
removed for repairs or adjustment, the following malfunctions may occur:
*Even with a disc loaded, the unit detects "no disc"
and cannot start play.
*Although a 12-cm disc is loaded, the unit detects
"8cm disc" mistakenly.
When the unit malfunctions this way, either re-position the light source, move the unit or cover the photo
transistor.
• During exchanging discs, do not press the keys for
the discs to be exchanged.
42
2) Test Mode
This mode is used for adjusting the CD mechanism
module of the device.
• Test mode starting procedure
Reset while pressing the 4 and 6 keys together.
• Test mode cancellation
Switch ACC, back-up OFF.
• If the 8 or 9 key is pressed while focus search is in
progress, immediately turn the power off (otherwise
the actuator may be damaged due to the lens stuck).
• Jump operation of TRs other than 100TR continues
after releasing the key. CRG move and 100TR jump
operations are brought into the “Tracking close” status when the key is released.
• Powering Off/On resets the jump mode to “Single TR
(91)”, the RF AMP gain setting to 0 dB, and the automatic adjustment value to the initial value.
• During exchanging discs, do not press the keys for
the discs to be exchanged.
Key to adjustment text
inside (12 keys type)
BAND
TRK+/FF
TRK-/REV
7
8
9
10
11
12
DISCSOURCE ON/OFF
HEAD UNIT (6 keys type)
BAND
TRK+/FF
TRK-/REV
1
2
3
4
5
6
DISCSOURCE ON/OFF
CDX-P656,P25
- Flow Chart
4
6
Test Mode In
Reset
SOURCE
Sourse CD
New test mode
BAND
TRK
MIN
Power ON
(Not adjustment for T.Offset)
SEC
00 00 00
Display
8
9
12
*1
Power ON
(Adjustment for T.Offset)
TRK
MIN
SEC
TRK
99 99 99
Display
RF AMP Gain Select
MIN
SEC
GG GG GG
Power OFF
Focus Close/
S Curve Check
TRK
MIN
SEC
TRK
<Tracking Servo Close>
MIN
TRK
SEC
MIN
SEC
TRK
MIN
*3
Auto Adjustment
Display Select
CRG−
MIN
SEC
TRK
00 00 00
or
TRK
*8
CRG+
00 00 00
8
TRK-
*8
0x 0x 0x
Display
TRK+
*2
Focus Mode
Select
91 91 91
Display
7
12
9
BAND
MIN
or
SEC
TRK
99 99 99
MIN
SEC
00 00 00
or
SEC
TRK
99 99 99
MIN
SEC
99 99 99
Power OFF
BAND
T.Close and
F,T AGC and
RF AGC and
Fit Servo
TRK+
12
9
T. Close and
Fit Servo
RF AGC Coefficient Display/
Rough Servo and RF AGC
7
TRK-
CRG+
TRK
MIN
T.Balance
Adjustment
CRG−
TRK
SEC
MIN
or
or
TRK
MIN
SEC
8x 8x 8x
8x 8x 8x
Display
8
TRK
SEC
MIN
SEC
9x 9x 9x
9x 9x 9x
Tracking
Open
Power OFF
7
BAND
9
12
*7
TRK+
F, T, RF AGC/
F.Bias Display Select
F, T AGC and
RF AGC
8
TRK-
*4 CRG−/TR Jump− *4
*5
CRG/TR Jump NO.
Select
CRG+/TR Jump+
*6
TRK
Power OFF
MIN
SEC
8x 8x 8x
Display
or
BAND
TRK
8
Tracking
Open
TRK
MIN
MIN
SEC
9x 9x 9x
SEC
8x 8x 8x
Display
or
TRK
7
MIN
TRK
SEC
72 00 00
< Mechanism test mode in >
MIN
Display
TRK
9
12
FF
*9
*10
<ELV,TRAY select>
TYP
*1
Display
*2
Display
<Operation mode
select >
+6dB
06 06 06
Focus Close
00 00 00
(99 99 99)
REV
*11
<Shift >
F.Offset Display
*12
<Shift >
+12dB
12 12 12
<Mechanism test
mode out >
F.AGC Gain
F.Cansel Display
ELV motor select
72
*10
00
0X
*6 CRG Move, 100TR Jump Only
100TRK
93(83)
RF AGC Gain
8ms pulse drive
72
00
00
CRG Move
94(84)
72
10
00
TRAY motor select
Display
72
10
0X
24ms pulse drive
Display 72
48ms pulse drive
32TRK
92(82)
T.AGC Gain
*8 Voltage of CRG Motor = 2 [V]
*4 Single TR/32TR/100TR
Single TR
Display 9x(8x):91(81)
TRK, MIN, SEC
(F,T.AGC Gain = (Present Value/Initial Value) × 20)
F.Cancel Value = {Top Rank 8bit of Set Value (7F [H] to 80 [H] ) + 128} / 4
= 63 [D] to (32 [D] ) to 00 [D]
*5
SEC
Display
*7
S Curve Check
01 01 01
RF.Offset Display
MIN
BAND
*9
*3
SEC
9x 9x 9x
00
01
DC drive
72
100ms pulse drive
Display 72
10
01
*11
ELV select : ELV dowm (Disc 12 → 1)
TRAY select : TRAY out
*12
ELV select : ELV up (Disc 1
TRAY select : TRAY in
00
02
DC drive
72
10
02
→ 12)
43
CDX-P656,P25
- Error Messages
If a CD is not operative or stopped during operation due to an error, the error mode is turned on and cause(s) of the
error is indicated with a corresponding number. This arrangement is intended at reducing nonsense calls from the
users and also for facilitating trouble analysis and repair work in servicing.
(1) Basic Indication Method
1) When SERRORM is selected for the CSMOD (CD mode area for the system), error codes are written to DMIN (minutes display area) and DSEC (seconds display area). The same data is written to DMIN and DSEC. DTNO remains
in blank as before.
2) Head unit display examples
Depending on display capability of LCD used, display will vary as shown below. xx contains the error number.
8-digit display
ERROR–xx
6-digit display
ERR–xx
OR
Err–xx
4-digit display
E–xx
* When the system is manufactured for an OEM basis, the error display will be configured according to the customer
specification.
(2) Error Code List
Code Class
Displayed error code Description of the code and potential cause(s)
10
Electricity Carriage Home NG
CRG can't be moved to inner diameter.
CRG can't be moved from inner diameter.
→ Failure on home switch or CRG move mechanism.
11
Electricity
Focus Servo NG
Focusing not available.
→ Stains on rear side of disc or excessive vibrations on REWRITABLE.
12
Electricity
Spindle Lock NG
Spindle not locked. Sub-code is strange (not readable).
→ Failure on spindle, stains or damages on disc, or excessive vibrations.
Subcode NG
A disc not containing CD-R data is found. Turned over disc are found,
though rarely.
→ Failure on home switch or CRG move mechanism.
RF AMP NG
An appropriate RF AMP gain can't be determined.
→ CD signal error.
17
Electricity
Setup NG
APC protection doesn't work. Focus can be easily lost.
→ Damages or stains on disc, or excessive vibrations.
30
Electricity
Search Time Out
Failed to reach target address.
→ CRG tracking error or damages on disc.
A0
System
Power Supply NG
Power (VD) is ground faulted.
→ Failure on SW transistor or power supply (failure on connector).
A1
System
Mechanism power
failure
Mechanism elevation reference voltage is out of
prescription.
→EREF adjustment VR and/or power abnormal.
50
Mechanism
Mechanism
An error upon
ejection
An error while putting in and out the tray
MAG switch release time has time out.
Elevation time out when eject.
Tray in / out time has time out.
Tray is caught when put in.
60
44
CDX-P656,P25
Code
70
Class
Displayed error code Description of the code and potential cause(s)
MechaAn error upon
Elevation time has time out.
nism
elevation
80
MechaAn error with an em- No disc is available.
nism
pty magazine inserted
Remarks: Unreadable TOC does not constitute an error. An intended operation continues in this case.
A newly designed head unit must conform to the example given above.
Upper digits of an error code are subdivided as shown below:
1x: Setup relevant errors, 3x: Search relevant errors, 3x: Search relevant errors, Ax: Other errors.
- New Test Mode
M-CD plays the same way as before.
If an error such as off focus, spindle unlocking, unreadable sub-code, or sound skipping occurs after setup, its
cause and time occurred (in absolute time) are displayed.
During setup, operational status of the control software (internal RAM: CPOINT) is displayed.
These displays and functions are prepared for enhancing aging in the servicing and efficiency of trouble analysis.
(1) Shifting to the New Test Mode
1 Turn on the current test mode by starting the reset from the 4 and 6 keys together.
2 Select M-CD for the source through the specified procedure including use of the [SOURCE] key. Then, press the
12 key while maintaining the regulator turned off.
3 After the above operations, the new test mode remains on irrespective of whether the M-CD is turned on or off.
You can reset the new test mode by turning on the reset start.
* With some products, the new test mode can be reset through the same operations as that employed for shifting to
the STBY mode (while maintaining the Acc turned off).
(2) Key Correspondence
Key
Test mode
(Example)
Power Off
Power On
BAND To power on
To power off
(offset adjustment performed)
UP
–
FWD-Kick
DOWN –
REV-Kick
7
–
T.Close (AGC performed)
/parameter display switching
8
RF AMP gain switching
Parameter display switching
/T.BAL adjustment/T.Open
9
To power on
F.Close/RF AGC/F.T.AGC
(offset adjustment not performed)
10
–
F.Open
11
–
Jump Off
12
–
F.Mode switching
/T.Close (no AGC)/Jump switching
In-play
–
New test mode
Error Production
Time/Err.No. switching
FF/TR+
REV/TRScan
–
–
–
Mode
–
–
–
–
–
–
–
Auto/Manu T.No./Time switching
45
CDX-P656,P25
Key
Mechanism Test Mode
(Example)
BAND
Back to the test mode
UP
Playing the mechanism
DOWN Playing the mechanism
7
Mechanism test mode in
8
–
9
TRAY/ELV select
10
–
11
–
12
Operation step select
Note: Eject and CD on/off is performed in the same procedure as that for the normal mode.
(3) Cause of Error and Error Code
Code Class
Contents
40
Electricity Off focus detected.
Description and cause
FOK goes low.
→ Damages/stains on disc, vibrations or failure on servo.
41
Electricity
Spindle unlocked.
FOK = Low continued for 50 msec.
→ Damages/stains on disc, vibrations or failure on servo.
42
Electricity
Sub-code unreadable.
Sub-code was unreadable for 50 msec.
→ Damages/stains on disc, vibrations or failure on servo.
43
Electricity
Sound skipping detected.
Last address memory function was activated.
→ Damages/stains on disc, vibrations or failure on servo.
Note: Mechanical errors during aging are not displayed.
The error codes should be indicated in the same way as in the normal mode.
(4) Display of Operational Status (CPOINT) during Setup
Status No. Contents
00
CD+5V ON process in progress.
01
Servo LSI initialization (1/3) in progress.
02
Servo LSI CRAM initialization in progress.
03
Servo LSI initialization (2/3) in progress.
04
Offset adjustment (1/3) in progress.
05
Offset adjustment (2/3) in progress.
06
Offset adjustment (3/3) in progress.
07
FZD adjustment in progress.
08
Servo LSI initialization (3/3) in progress.
10
Carriage move to home position started.
11
Carriage move to home position started.
12
Carriage is moving toward inner diameter.
13
Carriage is moving toward outer diameter.
14
15
20
21
22
23
24
25
Carriage outer kick in progress.
Carriage outer diameter feed (1 second) in progress.
Servo close started.
Pre-processing for focus search started.
Spindle rotation and focus search started.
Waiting for focus close (XSI=Low).
Standing by after focus close is over.
Focus search preprocessing is in
progress while setup protection is turned on.
46
Protective action
None
None
None
None
None
None
None
None
None
None
None
Specified 10 seconds has been passed or failure
on home switch.
Specified 10 seconds has been passed or failure
on home switch.
None
None
None
None
None
Specified focus search time has been passed.
Specified focus search time has been passed.
None
CDX-P656,P25
Status No. Contents
26
Focus search preprocessing is in
progress while focus recovery is turned on.
27
Wait time after focus close is set up.
28
Standing by after focus close is over.
29
Setup (1/2) before T balance adjustment is started.
30
Setup (2/2) before T balance adjustment is started.
31
T balance adjustment started.
32
T balance adjustment (1/2).
33
T balance adjustment (2/2).
34
Waiting for spindle rotation to end.
Spindle rough servo.
35
Standing by after spindle rough servo is over.
36
RF AGC started.
37
RF AGC started.
38
RF AGC ending process in progress.
39
Tracking close in progress.
40
Standing by after tracking is closed.
Carriage closing in progress.
41
Focus/tracking AGC started.
42
Focus AGC started.
43
Focus AGC in progress.
44
Tracking AGC in progress.
45
Standing by after focus/tracking AGC are over.
46
Spindle processes applicable servo.
47
Check for servo close is started.
48
Check of LOCK pin started.
49
RF AGC started.
50
RF AGC in progress.
51
Standing by after RF AGC is over.
Protective action
None
Off focus.
Off focus.
Off focus.
Off focus.
Off focus.
Off focus.
Off focus.
Off focus.
Off focus.
Off focus.
Off focus.
Off focus.
Off focus.
Off focus.
Off focus.
Off focus.
Off focus.
Off focus.
Off focus.
Off focus.
Off focus.
Off focus or spindle not locked.
Off focus.
Off focus.
Off focus.
(5) Display Examples
1) During Setup (When status no. = 11)
TRK No.
MIN.
SEC.
11
11'
11"
2) During Operation (TOC read, TRK search, Play, FF and REV)
The same as in the normal mode.
3) When a Protection Error Occurred
Switch to the following displays (A) and (B) using the [BAND] switch:
(A) Error occurrence timing display in absolute time.
An example: Error occurred in 12th tune at 34'56" in absolute time.
TRK No.
12
MIN.
34'
SEC.
56"
(B) Error No. display
An example: Error #40 (Off focus is detected)
ERROR-40
47
CDX-P656,P25
7.3 BLOCK DIAGRAM
C
D
E
48
A
CDX-P656,P25
B
49
CDX-P656,P25
8. OPERATIONS AND SPECIFICATIONS
8.1 OPERATION
If the power does not switch on or if the compact disc player does
not operate when the button on the multi-CD controller is pressed,
or if the multi-CD controller display is incorrect, press this button on
the player with the tip of a pencil to restore normal operation. (This
button is located inside the door.) Always press the clear button on
the multi-CD controller, too, after pressing this button.
• If the clear button is pressed when the player contains a magazine
or the ignition switch is set to the ON or ACC position, the CD title
display and ITS memory are cleared.
Clear button
8.2 SPECIFICATIONS
General
System ..................................................... Compact disc audio system
Usable discs .................................................................... Compact Disc
Signal format ....................................... Sampling frequency: 44.1 kHz
Number of quantization bits: 16; linear
Power source ......................................................................... 14.4 V DC
(10.8 — 15.1 V allowable)
Max. current consumption ........................................................... 1.0 A
Weight ............................................................................ 1.9 kg (4.2 lbs.)
Dimensions .......................................... 248 (W) × 66 (H) × 169 (D) mm
[9-3/4 (W) × 2-5/8 (H) × 6-5/8 (D) in.]
Audio
Frequency characteristics ................................ 5 — 20,000 Hz (± 1 dB)
Signal-to-noise ratio ............................ 92 dB (1 kHz) (IHF-A Network)
Distortion ................................................................................... 0.005 %
Dynamic range ................................................................. 90 dB (1 kHz)
Output level ...................................................... 1,000 mV (1 kHz, 0 dB)
Number of channels .............................................................. 2 (stereo)
Note:
Specifications and design are subject to possible modification without prior notice due to improvements.