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-ZZY. NOV. 1999 Printed in Japan
ORDER NO.
CRT2424
HIGH POWER CASSETTE PLAYER WITH FM/AM TUNER
KEH-1900
X1M/UC
Service
Manual
CONTENTS
1. SAFETY INFORMATION............................................2
2. EXPLODED VIEWS AND PARTS LIST ......................2
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM ....8
4. PCB CONNECTION DIAGRAM................................18
5. ELECTRICAL PARTS LIST........................................26
6. ADJUSTMENT .........................................................30
7. GENERAL INFORMATION.......................................32
7.1 DISASSEMBLY ..................................................32
7.2 PARTS ................................................................33
7.2.1 IC ...............................................................33
7.2.2 DISPLAY ...................................................36
8. OPERATIONS AND SPECIFICATIONS ....................37
KEH-1950
X1M/ES
KEH-1900/X1M/UC
- This service manual should be used together with the following manual(s):
Model No.
Order No.
Mech. Module Remarks
CX-644
CRT1800
2M
Cassette Mech. Module:Circuit Description, Mech.Description, Disassembly
3
6
10
2
9
8
7
5
4
14
19
18
11
15
13
12
1
16
20
17
2
KEH-1900,1950
2. EXPLODED VIEWS AND PARTS LIST
2.1 PACKING
1. SAFETY INFORMATION
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
3
KEH-1900,1950
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
Part.No
Mark No. Description
KEH-1900/X1M/UC
KEH-1950/X1M/ES
*
1 Accessory Assy
CEA2350
CEA2350
2 Spring
CBH1650
CBH1650
3 Screw Assy
CEA2351
CEA2351
4 Screw
CBA1304
CBA1304
*
5 Polyethylene Bag
CEG-127
CEG-127
6 Screw
CRZ50P090FMC
CRZ50P090FMC
7 Screw
TRZ50P080FMC
TRZ50P080FMC
*
8 Polyethylene Bag
CEG-158
CEG-158
9 Handle
CNC5395
CNC5395
10 Bush
CNV3930
CNV3930
11 Polyethylene Bag
CEG1173
CEG-162
12 Carton
CHG3913
CHG3914
13 Contain Box
CHL3913
CHL3914
14 Protector
CHP1622
CHP1622
15 Protector
CHP1623
CHP1623
16 Owner's Manual
CRD3099
CRD3097
17 Installation Manual
CRD3100
CRD3098
18 Case Assy
CXB3520
CXB3520
19 Cord Assy
CDE6145
CDE6145
*
20 Card
ARY1048
Not used
- Owner's Manual
Model
Part No.
Language
KEH-1900/X1M/UC
CRD3099
English, French, Spanish
KEH-1950/X1M/ES
CRD3097
English, Spanish, Portuguese(B), Chinese, Arabic
- Installation Manual
Model
Part No.
Language
KEH-1900/X1M/UC
CRD3100
English, French, Spanish
KEH-1950/X1M/ES
CRD3098
English, Spanish, Portuguese(B), Chinese, Arabic
4
KEH-1900,1950
2.2 EXTERIOR
5
KEH-1900,1950
(1) EXTERIOR SECTION PARTS LIST
Mark No. Description
Part No.
Mark No. Description
Part No.
1 Screw
BSZ26P050FMC
2 Screw
BSZ30P055FUC
3 Screw
BSZ30P060FMC
4 Screw
BSZ30P100FMC
5 Cord Assy
CDE6145
6 Case
CNB2481
7 Holder
CNC5704
8 Insulator
CNM5025
9 Cushion
CNM5210
10 Panel
CNS5214
11 Tuner Amp Unit
See Contrast table(2)
12 Screw
BPZ26P080FMC
13 Screw
BSZ26P080FMC
14 Screw
BSZ26P140FMC
15 FM/AM Tuner Unit
See Contrast table(2)
16 Holder
CNC6554
17 Pin Jack(CN401)
CKB1028
18 Plug(CN603)
CKM1270
19 Connector(CN601)
CKS3362
20 Connector(CN602)
CKS3581
21 Antenna Jack(CN301)
CKX1056
22 Panel
CNB2247
23 Holder
CNC5399
24 Holder
CNC6216
25 Heat Sink
CNC6217
26 Holder
CNC6531
27 Holder
CNC6845
28 Chassis Unit
CXA9851
29 Holder Unit
CXB2687
30 Detach Grille Assy
See Contrast table(2)
31 Screw
BPZ20P120FZK
32 Button(EJECT)
CAC5870
33 Button(REW)
CAC5872
34 Button(FF)
CAC5874
35 Button(CROSS)
CAC6295
36 Button(TUNER/BAND)
CAC6297
37 Button(1-6)
CAC6300
38 Button(DETACH)
CAC6301
39 Spring
CBH1836
40 Spring
CBH2307
41 Cover
CNS5696
42 Keyboard Unit
CWM6745
43 LCD(LCD901)
CAW1568
44 Connector(CN901)
CKS3580
45 Holder
CNC8525
46 Sheet
CNM6486
47 Lighting Conductor
CNV5969
48 Rubber
CNV5970
49 Connector
CNV5972
50 Grille Unit
See Contrast table(2)
51 Button
CAC4836
52 Spring
CBH1834
53 Spring
CBH1835
54 Spring
CBH2367
55 Bracket
CNC6135
56 Bracket
CNC6791
57 Arm
CNV4692
58 Arm
CNV4693
59 Arm
CNV4728
60 Panel Unit
CXB4926
61 Door
CAT2109
62 Spring
CBH1838
63 Screw
IMS20P030FZK
64 Fuse(10A)
CEK1136
65 Cassette Mechanism Assy
EXK3410
66 IC(IC501)
TDA7384
67 Transistor(Q804)
2SD2395
*
68 Cord
See Contrast table(2)
69 Holder
See Contrast table(2)
(2) CONTRAST TABLE
KEH-1900/X1M/UC and KEH-1950/X1M/ES are constructed the same except for the following:
Part No.
Mark
No.
Description
KEH-1900/X1M/UC
KEH-1950/X1M/ES
11
Tuner Amp Unit
CWM6742
CWM6744
15
FM/AM Tuner Unit
CWE1467
CWE1486
30
Detach Grille Assy
CXB4673
CXB4674
50
Grille Unit
CXB4633
CXB4634
*
68
Cord
CDC1043
Not used
69
Holder
CNC8818
Not used