Pioneer DEH-P646 User manual

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. 501 Orchard Road, #10-00, Lane Wheelock Place, Singapore 23880
C PIONEER ELECTRONIC CORPORATION 1998
MULTI-CD CONTROL HIGH POWER CD PLAYER WITH FM/AM TUNER
DEH-P646 ES
Se r v i c e
M a nu a l
DEH-546 ES
DEH-P646
K-FEA. FEB. 1998 Printed in Japan
ORDER NO.
CRT2149
CONTENTS
1. SAFETY INFORMATION ............................................2
2. EXPLODED VIEWS AND PARTS LIST.......................3
3. SCHEMATIC DIAGRAM ...........................................10
4. PCB CONNECTION DIAGRAM ................................30
5. ELECTRICAL PARTS LIST ........................................40
6. ADJUSTMENT..........................................................50
7. GENERAL INFORMATION .......................................56
7.1 PARTS .................................................................56
7.1.1 IC................................................................56
7.1.2 DISPLAY....................................................62
7.2 DIAGNOSIS ........................................................63
7.2.1 DISASSEMBLY .........................................63
7.2.2 TEST MODE..............................................64
7.3 BLOCK DIAGRAM ..............................................66
8. OPERATIONS AND SPECIFICATIONS.....................68
-See the separate manual CX-597(CRT1829) for the CD mechanism description, disassembly and circuit
description.
-The CD mechanism employed in this model is one of S7 series.

2
DEH-P646,546
-CD Player Service Precautions
1. For pickup unit(CXX1230) handling, please refer
to"Disassembly"(CX-597 Service Manual CRT1829).
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 con-
nector is plugged or unplugged.
3. Please checking the grating after changing the ser-
vice pickup unit(see page 54).
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.
1. SAFETY INFORMATION

3
DEH-P646,546
2. EXPLODED VIEWS AND PARTS LIST
2.1 PACKING
Fig. 1
-PACKING SECTION PARTS LIST
Mark No. Description Part No. Mark No. Description Part No.
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.
1 Cord Assy(DEH-P646/ES) CDE5483
Cord Assy(DEH-546/ES) CDE5484
2 Accessory Assy CEA2002
3 Polyethylene Bag CEG-162
4 Battery CEX1030
5 Carton(DEH-P646/ES) CHG3437
Carton(DEH-546/ES) CHG3446
6 Contain Box(DEH-P646/ES) CHL3437
Contain Box(DEH-546/ES) CHL3446
7 Protector CHP1766
8 Protector CHP1767
9-1 Polyethylene Bag CEG1116
9-2 Owner's Manual(DEH-P646/ES)CRD2561
Owner's Manual(DEH-546/ES) CRD2714
9-3 Owner's Manual(DEH-P646/ES)CRD2562
9-4 Installation Manual
(DEH-P646/ES) CRD2563
Installation Manual
(DEH-546/ES) CRD2579
9-5 Caution Card CRP1182
10 Case Assy CXB1063
11 Remote Control Unit CXB1225
1
2
3
4
5
6
7
8
9
10
11

4
DEH-P646,546
-Owner’s Manual
Model Part No. Language
DEH-P646/ES CRD2561 English, Spanish
CRD2562 Portuguese, Arabic
DEH-546/ES CRD2714 English, Spanish, Portuguese, Arabic
-Installation Manual
Model Part No. Language
DEH-P646/ES CRD2563 English, Spanish, Portuguese, Arabic
DEH-546/ES CRD2579 English, Spanish, Portuguese, Arabic
-Accessory Assy
Screw
TRZ50P080FMC(x4)
Screw
CRZ50P090FMC(x4)
Screw
CBA1284
Screw Assy CEA2003
Spring
CBH-865
Handle
CNC5395(x2)
Bush
CNV1009
Accessory Assy CEA2002
Polyethylene Bag
CEG-127
Polyethylene Bag
CEG-158
*
*
Fig. 2

5
DEH-P646,546
2.2 EXTERIOR
Fig. 3

6
DEH-P646,546
1 Screw ASZ26P055FUC
2 Screw ASZ26P080FMC
3 Screw BSZ26P050FMC
4 Screw BSZ30P060FMC
5 Screw BSZ30P180FMC
6 Cord Assy See Contrast table(2)
7 Cord Assy See Contrast table(2)
8 Cord Assy See Contrast table(2)
9 Fuse CEK1136
10 Cap CNS1472
11 Resistor RS1/2PMF102J
12 Cable CDE5635
13 Insulator CNM5761
14 Spring CBH-865
15 Screw CBA1284
16 Handle CNC5395
17 Bush CNV1009
18 Case CNB2119
19 Holder CNC4963
20 Holder CNC6798
21 Holder CNC6862
22 Earth Terminal CNC7358
23 Spacer CNM4913
24 Insulator CNM5535
25 Panel CNS4200
26 Cap See Contrast table(2)
27 Tuner Amp Unit See Contrast table(2)
28 Screw BPZ26P080FMC
29 Screw BSZ26P140FMC
30 Antenna Cord CDH1234
31 Clamper CEF1009
32 Pin Jack(CN253) CKB1028
33 Terminal(CN501) CKF1059
34 Plug(CN901) CKM1278
35 Plug(CN802) CKS-783
36 Connector(CN651) CKS2228
37 Connector(CN101) See Contrast table(2)
38 Connector(CN801) CKS3581
39 Connector(CN851) See Contrast table(2)
40 Connector(CN254) See Contrast table(2)
41 Holder CNC5968
42 Holder CNC6132
43 Holder CNC6356
44 Holder CNC7429
45 Holder See Contrast table(2)
46 Insulator CNM4684
47 Heat Sink CNR1458
48 FM/AM Tuner Unit CWE1485
49 Holder CNC6555
50 Case Assy CXB1063
51 Remote Control Unit CXB1225
52 Cover CNS4139
53 Chassis Unit See Contrast table(2)
54 Detach Grille Assy See Contrast table(2)
55 Screw BPZ20P100FZK
56 Button CAC5397
57 Button CAC5398
58 Button CAC5399
59 Button CAC5402
60 Button CAC5403
61 Button CAC5404
62 Button CAC5405
63 Button CAC5430
64 Button CAC5450
65 Button CAC5451
66 Spring CBH2103
67 Cover CNM4704
68 Lighting Conductor CNV5180
69 Lighting Conductor CNV5181
70 Keyboard Unit See Contrast table(2)
71 LCD See Contrast table(2)
72 Cord CDE5665
73 EL CEL1536
74 Connector(CN1801) CKS3580
75 Holder CNC7435
76 Film CNM4349
77 Spacer CNM5449
78 Connector CNV5182
79 Housing CNV5183
80 Grille Unit See Contrast table(2)
81 Cover Unit CXB2480
82 Screw BPZ20P060FMC
83 Button CAC5180
84 Spring CBH1834
85 Spring CBH1835
86 Spring CBH1996
87 Bracket CNC6135
88 Bracket CNC6791
89 Arm CNV4692
90 Arm CNV4693
-EXTERIOR SECTION PARTS LIST
(1) PARTS LIST
Mark No. Description Part No. Mark No. Description Part No.

7
DEH-P646,546
91 Arm CNV4951
92 Cover CNM4875
93 Panel See Contrast table(2)
94 Screw IMS20P030FZK
95 CD Mechanism Module CXK5004
96 IC(IC201) TDA7386
97 Transistor(Q951, 971) 2SD2396
98 Spacer CNM5875
99 Clamper See Contrast table(2)
Mark No. Description Part No.
Part No.
Mark No. Symbol and Description DEH-P646/ES DEH-546/ES
6 Cord Assy CDE5185 Not used
7 Cord Assy CDE5209 Not used
8 Cord Assy CDE5483 CDE5484
26 Cap CNV2680 Not used
27 Tuner Amp Unit CWM5622 CWM5630
37 Connector(CN101) CKS3408 Not used
39 Connector(CN851) CKS3597 Not used
40 Connector(CN254) CKS3598 Not used
45 Holder CNC7430 CNC7434
53 Chassis Unit CXB1984 CXB1989
54 Detach Grille Assy CXB1996 CXB2006
70 Keyboard Unit CWM5636 CWM5640
71 LCD CAW1459 CAW1479
80 Grille Unit CXB1969 CXB1979
93 Panel CNS4451 CNS4869
99 Clamper CEF1009 Not used
(2) CONTRAST TABLE
DEH-P646/ES and DEH-546/ES are constructed same except for the following:

8
DEH-P646,546
2.3 CD MECHANISM MODULE
Fig. 4

9
DEH-P646,546
-CD MECHANISM MODULE SECTION PARTS LIST
1 Control Unit CWX2224
2 Pickup Unit(Service) CXX1230
3 Screw IMS26P035FMC
4 Screw BMZ20P025FMC
5 Screw BMZ20P040FMC
6 Screw BSZ20P040FMC
7 Screw CBA1077
8 Screw CBA1250
9 Screw CBA1296
10 Screw CBA1362
11 Spring CBH1724
12 Spring CBH1729
13 Spring CBH1730
14 Spring CBH1731
15 Spring CBH1732
16 Spring CBH1745
17 Spring CBH1848
18 Spring CBH1849
19 Spring CBH1939
20 Spring CBL1214
21 Roller CLA2627
22 Frame CNC5796
23 Bracket CNC5871
* 24 Bracket CNC6376
25 Cushion CNM3917
26 Sheet CNM4873
27 •••••
28 PCB CNP4230
29 Bearing CNR1415
30 Belt CNT1071
31 Damper CNV3974
32 Gear CNV4128
33 Gear CNV4129
34 Gear CNV4130
35 Gear CNV4131
36 Holder CNV4663
37 Holder CNV5071
38 Guide CNV4484
39 Screw Unit(S7) CXA8699
40 CRG Motor Unit(S7) CXA8986
41 Motor Unit CXA8912
42 Lever Unit CXA9300
43 Chassis Unit CXB2574
44 Screw JFZ20P025FMC
45 Connector(CN101) CKS1953
46 Connector(CN701) CKS2774
47 Connector(CN801) CKS2196
48 Spring CBH1832
49 Spring CBH1833
50 Roller CLA2627
51 Arm CNV4136
52 Arm Unit CXA8565
53 Bracket CNC6056
54 Load Motor Unit(S7) CXA8702
55 Screw JFZ20P025FMC
56 Arm CNV4120
57 Roller CNV4509
58 Gear Unit(S7) CXA8701
59 Screw CBA1296
60 Frame CNC5797
61 Damper CNV3974
62 Spring CBH1736
63 Spring CBH1863
64 Spring CBH1945
65 Spring CBL1269
66 Arm CNC5799
67 Lever CNC6054
68 Spacer CNM3315
69 Sheet CNM4849
70 Arm CNV5436
71 Arm CNV4123
72 Arm CNV4124
73 Arm CNV4125
74 Arm CNV4138
75 Arm CNV4139
76 Clamper CNV5308
77 Screw CBA1250
78 Connector(CN1) CDE4576
79 Arm CNC7383
* 80 Gathering PCB CNX2445
81 Photo-transistor(Q1, 2) CPT-230S-X
82 ELBO Arm Assy(S7) CXA8889
83 Load Motor Assy(S7) CXA8891
84 LO Arm Assy(S7) CXA8892
85 Shaft CLA3133
86 Guide Arm Assy(S7) CXB1850
87 Ball CNR1189
Mark No. Description Part No. Mark No. Description Part No.

10
DEH-P646,546
1234
1234
D
C
B
A
A
3. SCHEMATIC DIAGRAM
3.1 OVERALL CONNECTION DIAGRAM(GUIDE PAGE)
Note: When ordering service parts, be sure to refer to “EXPLODED VIEWS AND PARTS LIST” or “ELECTRICAL PARTS
LIST”.
A-a A-b
A-a A-b
A-b
A-a
Large size
SCH diagram
Guide page
Detailed page
A-a
A
E
B
C
D
F
F