PIONEER 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 CORPORATION 1999
K-ZZD. NOV. 1999 Printed in Japan
ORDER NO.
CRT2421
HIGH POWER CASSETTE PLAYER WITH FM/AM TUNER
KEH-3950
X
1M/ES
Service
Manual
CONTENTS
1. SAFETY INFORMATION ............................................2
2. EXPLODED VIEWS AND PARTS LIST .......................2
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM ...10
4. PCB CONNECTION DIAGRAM ................................26
5. ELECTRICAL PARTS LIST ........................................36
6. ADJUSTMENT..........................................................43
7. GENERAL INFORMATION .......................................44
7.1 DISASSEMBLY ...................................................44
7.2 PARTS .................................................................45
7.2.1 IC................................................................45
7.2.2 DISPLAY ....................................................49
8. OPERATIONS AND SPECIFICATIONS.....................50
KEH-3950/X1M/ES
- This service manual should be used together with the following manual(s):
Model No.
Order No.
Mech. Module Remarks
CX-1011
CRT2406
3L
Cassette Mech. Module:Circuit Description, Mech.Description, Disassembly
KEH-3910 X1M/EE
HIGH POWER CASSETTE PLAYER WITH FM/MW/LW TUNER
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.
2
KEH-3950,3910
1. SAFETY INFORMATION
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.
2. EXPLODED VIEWS AND PARTS LIST
2.1 PACKING(KEH-3950/X1M/ES)
4
7
11
3
10
9
8
6
5
16
2
17
12
15
14
13
1
1-1 Owner's Manual
CRD3119
1-2 Installation Manual
CRD3121
1-3 Polyethylene Bag
CEG1116
2 Cord Assy
CDE6222
3 Spring
CBH1650
4 Screw Assy
CEA2351
5 Screw
CBA1304
*
6 Polyethylene Bag
CEG-127
7 Screw
CRZ50P090FMC
8 Screw
TRZ50P080FMC
*
9 Polyethylene Bag
CEG-158
10 Handle
CNC5395
11 Bush
CNV3930
12 Polyethylene Bag
CEG-162
13 Carton
CHG3846
14 Contain Box
CHL3846
15 Protector
CHP2243
16 Protector
CHP2244
17 Case Assy
CXB3520
- PACKING SECTION PARTS LIST
Mark No. Description
Part No.
Mark No. Description
Part No.
3
KEH-3950,3910
- Owner's Manual, Installation Manual
Model
Part No.
Language
KEH-3950/X1M/ES
CRD3119
English, Spanish, Portuguese(B),
CRD3121
Chinese, Arabic
- Owner's Manual, Installation Manual
Model
Part No.
Language
KEH-3910/X1M/EE
CRD3125
English, Russian
CRD3126
10
1
13
7
11
9
8
12
2
5
4
6
3
2.2 PACKING(KEH-3910/X1M/EE)
1 Cord Assy
CDE6222
2 Accessory Assy
CEA1917
3 Screw
CBA1304
4 Handle
CNC5395
5 Bush
CNV3930
*
6 Polyethylene Bag
E36-615
7 Polyethylene Bag
CEG-162
8 Carton
CHG3847
9 Contain Box
CHL3847
10 Protector
CHP2243
11 Protector
CHP2244
12-1 Owner's Manual
CRD3125
12-2 Installation Manual
CRD3126
12-3 Polyethylene Bag
CEG1116
13 Case Assy
CXB3520
- PACKING SECTION PARTS LIST
Mark No. Description
Part No.
Mark No. Description
Part No.
4
KEH-3950,3910
2.3 EXTERIOR(KEH-3950/X1M/ES)
5
KEH-3950,3910
1 Screw
BSZ26P050FMC
2 Screw
BSZ30P050FMC
3 Screw
BSZ30P200FMC
4 Cord Assy
CDE6222
5 ·····
6 Case
CNB2350
7 Earth Plate
CNC8368
8 Spacer
CNM4913
9 Insulator
CNM5963
10 Tuner Amp Unit
CWM6810
11 Screw
BSZ26P080FMC
12 Screw
BSZ26P160FMC
13 ·····
14 FM/AM Tuner Unit
CWE1501
15 Holder
CNC7532
16 Plug(CN603)
CKM1270
17 Connector(CN602)
CKS3568
18 Connector(CN601)
CKS3581
19 Antenna Jack(CN402)
CKX1056
20 Panel
CNB2514
21 Holder
CNC5399
22 Holder
CNC6845
23 Holder
CNC7533
24 Holder
CNC7996
25 Insulator
CNM5967
26 Heat Sink
CNR1505
27 Holder Unit
CXB2687
28 ·····
29 Chassis Unit
CXB3012
30 Detach Grille Assy
CXB4854
31 Screw
BPZ20P100FZK
32 Button(DETACH)
CAC5789
33 Button(1-6)
CAC6275
34 Button(EJECT)
CAC6277
35 Button(+ -)
CAC6273
36 Button(SELECT)
CAC6276
37 Button(SOURCE/LOUD)
CAC6495
38 Spring
CBH2210
39 Cover
CNS5661
40 Keyboard Unit
CWM6814
41 LCD(LCD1801)
CAW1560
42 Connector(CN1801)
CKS3580
43 Holder
CNC8517
44 Rubber
CNV5954
45 Lighting Conductor
CNV6274
46 Rubber
CNV5968
47 Grille Unit
CXB4523
48 Button
CAC4836
49 Spring
CBH1834
50 Spring
CBH1835
51 Spring
CBH2182
52 Bracket
CNC6135
53 Bracket
CNC6791
54 Arm
CNV4692
55 Arm
CNV4693
56 Arm
CNV4728
57 Panel Unit
CXB4927
58 Door
CAT2109
59 Spring
CBH1838
60 Screw
IMS20P030FZK
61 Cassette Mechanism Module EXK4100
62 Screw
ISS26P055FUC
63 Fuse(10A)
CEK1136
64 IC(IC302)
TDA7384
65 Transistor(Q904)
2SD2396
66 Pin Jack(CN301)
CKB1028
67 Screw
BPZ26P080FMC
68 Panel
CNS5132
- EXTERIOR SECTION PARTS LIST
Mark No. Description
Part No.
Mark No. Description
Part No.