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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.
CRT2420
HIGH POWER CASSETTE PLAYER WITH RDS TUNER
KEH-3930R
X
1M/EW
Service
Manual
CONTENTS
1. SAFETY INFORMATION ............................................2
2. EXPLODED VIEWS AND PARTS LIST .......................2
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM .....9
4. PCB CONNECTION DIAGRAM ................................22
5. ELECTRICAL PARTS LIST ........................................32
6. ADJUSTMENT..........................................................36
7. GENERAL INFORMATION .......................................37
7.1 DISASSEMBLY ...................................................37
7.2 PARTS .................................................................38
7.2.1 IC................................................................38
7.2.2 DISPLAY ....................................................42
8. OPERATIONS AND SPECIFICATIONS.....................43
KEH-3930R/X1M/EW
- 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-3900R X1M/EW


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2
KEH-3930R,3900R
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
10
1
13
7
11
9
8
12
2
5
4
6
3


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3
KEH-3930R,3900R
1 Cord Assy
CDE6100
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
See Contrast table(2)
9 Contain Box
See Contrast table(2)
10 Protector
CHP2243
11 Protector
CHP2244
12-1 Owner's Manual
CRD3122
12-2 Owner's Manual
CRD3123
12-3 Installation Manual
CRD3124
*
12-4 Passport
CRY1013
*
12-5 Warranty Card
CRY1157
12-6 Polyethylene Bag
CEG1116
13 Case Assy
CXB3520
Mark No. Description
Part No.
Mark No. Description
Part No.
(1) PACKING SECTION PARTS LIST
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.
Part No.
Mark No. Symbol and Description KEH-3930R/X1M/EW
KEH-3900R/X1M/EW
8 Carton
CHG3844
CHG3843
9 Contain Box
CHL3844
CHL3843
(2) CONTRAST TABLE
KEH-3930R/X1M/EW and KEH-3900R/X1M/EW are constructed the same except for the following:
- Owner's Manual, Installation Manual
Model
Part No.
Language
KEH-3930R/X1M/EW
CRD3122
English, Spanish, German
KEH-3900R/X1M/EW
CRD3123
French, Italian, Dutch
CRD3124
English, Spanish, German,
French, Italian, Dutch


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4
KEH-3930R,3900R
2.2 EXTERIOR


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5
KEH-3930R,3900R
1 Screw
BSZ26P050FMC
2 Screw
BSZ30P050FMC
3 Screw
BSZ30P200FMC
4 Cord Assy
CDE6100
5 Plug
CKM1314
6 Case
CNB2350
7 Earth Plate
CNC8368
8 Spacer
CNM4913
9 Insulator
CNM5963
10 Tuner Amp Unit
CWM6806
11 Screw
BSZ26P080FMC
12 Screw
BSZ26P160FMC
13 Cord
CDE6158
14 FM/AM Tuner Unit
CWE1500
15 Holder
CNC7532
16 Plug(CN604)
CKM1288
17 Connector(CN602)
CKS3568
18 Connector(CN601)
CKS3581
19 Antenna Jack(CN402)
CKX1056
20 Panel
CNB2344
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
See Contrast table(2)
30 Detach Grille Assy
See Contrast table(2)
31 Screw
BPZ20P100FZK
32 Button(DETACH)
See Contrast table(2)
33 Button(1-6)
CAC6275
34 Button(EJECT)
CAC6277
35 Button(+ -)
See Contrast table(2)
36 Button(SELECT)
See Contrast table(2)
37 Button(SOURCE/LOUD)
CAC6494
38 Spring
CBH2210
39 Cover
See Contrast table(2)
40 Keyboard Unit
See Contrast table(2)
41 LCD(LCD1801)
CAW1559
42 Connector(CN1801)
CKS3580
43 Holder
CNC8517
44 Rubber
CNV5954
45 Lighting Conductor
CNV6274
46 Rubber
CNV5968
47 Grille Unit
See Contrast table(2)
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
See Contrast table(2)
58 Door
See Contrast table(2)
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
(1) EXTERIOR SECTION PARTS LIST
Mark No. Description
Part No.
Mark No. Description
Part No.
Part No.
Mark No. Symbol and Description KEH-3930R/X1M/EW
KEH-3900R/X1M/EW
29 Chassis Unit
CXB4530
CXB4529
30 Detach Grille Assy
CXB4850
CXB4849
32 Button(DETACH)
CAC5929
CAC5789
35 Button(+ -)
CAC6458
CAC6273
36 Button(SELECT)
CAC6459
CAC6276
39 Cover
CNS5662
CNS5661
40 Keyboard Unit
CWM6813
CWM6812
47 Grille Unit
CXB5840
CXB4519
57 Panel Unit
CXB4929
CXB4928
58 Door
CAT2108
CAT2109
(2) CONTRAST TABLE
KEH-3930R/X1M/EW and KEH-3900R/X1M/EW are constructed the same except for the following: