Pioneer KEH-1900R 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. 253 Alexandra Road, #04-01, Singapore 159936
C PIONEER ELECTRONIC CORPORATION 1999 K-ZZB. MAR. 1999 Printed in Japan
ORDER NO.
CRT2267
HIGH POWER CASSETTE PLAYER WITH RDS TUNER
KEH-1900R X1M/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................................18
5. ELECTRICAL PARTS LIST........................................26
6. ADJUSTMENT.........................................................31
7. GENERAL INFORMATION.......................................33
7.1 PARTS ................................................................33
7.1.1 IC...............................................................33
7.1.2 DISPLAY ...................................................36
7.2 DISASSEMBLY ..................................................37
8. OPERATIONS AND SPECIFICATIONS....................38
KEH-1930R X1M/EW
NOTE:
-See the separate manual CX-644(CRT1800) for the cassette mechanism description.
-The cassette mechanism assy employed in this model is one of 2M series.
KEH-1900R/X1M/EW

2
KEH-1900R,1930R
2. EXPLODED VIEWS AND PARTS LIST
2.1 PACKING
2
4
3
6
9
1
12
11
10
8
7
15
16
13
14
5
17
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.

3
KEH-1900R,1930R
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-1900R/X1M/EW KEH-1930R/X1M/EW
1 Cord Assy CDE5807 CDE5807
2 Accessory Assy CEA1917 CEA1917
3 Handle CNC5395 CNC5395
4 Bush CNV3930 CNV3930
5 Screw CBA1304 CBA1304
* 6 Polyethylene Bag E36-615 E36-615
7 Carton CHG3600 CHG3601
8 Contain Box CHL3600 CHL3601
9 Protector CHP1622 CHP1622
10 Protector CHP1623 CHP1623
11 Polyethylene Bag CEG-162 CEG-162
12 Case Assy CXB3520 CXB3520
13 Owner's Manual CRD2806 CRD2806
14 Owner's Manual CRD2807 CRD2807
15 Installation Manual CRD2809 CRD2809
* 16 Passport CRY1013 CRY1013
* 17 Warranty Card CRY1087 CRY1087
-Owner's Manual, Installation Manual
Model Part No. Language
KEH-1900R/X1M/EW CRD2806 English,Spanish,Dutch
KEH-1930R/X1M/EW CRD2807 French,Italian,German
CRD2809 English,Spanish,Dutch,French,Italian,German

4
KEH-1900R,1930R
2.2 EXTERIOR

5
KEH-1900R,1930R
(1) EXTERIOR SECTION PARTS LIST
Mark No. Description Part No. Mark No. Description Part No.
1 Screw BSZ26P050FMC
2 Screw BSZ30P100FMC
3 Cord Assy CDE5807
4 Terminal Cover CKX-003
5 Case CNB2481
6 Screw BSZ30P055FUC
7 Screw BSZ30P060FMC
8 Screw BSZ30P100FMC
9 Holder CNC5704
10 Cushion CNM4870
11 Insulator CNM5025
12 Tuner Amp Unit CWM6350
13 •••••
14 Screw BSZ26P080FMC
15 Screw BSZ26P140FMC
16 FM/AM Tuner Unit CWE1466
17 Holder CNC6554
18 •••••
19 Plug(CN601) CKM1270
20 Connector(CN604) CKS3362
21 •••••
22 Connector(CN603) CKS3581
23 Antenna Jack(CN301) CKX1056
24 Panel CNB2246
25 Holder CNC5399
26 Holder CNC6216
27 Heat Sink CNC6217
28 •••••
29 Holder CNC6845
30 Chassis Unit See Contrast table(2)
31 Holder Unit CXB2687
32 Button CAC4836
33 Spring CBH1834
34 Spring CBH1835
35 Spring CBH1996
36 Bracket CNC6135
37 Bracket CNC6791
38 Arm CNV4692
39 Arm CNV4693
40 Arm CNV4728
41 Panel Unit See Contrast table(2)
42 Door See Contrast table(2)
43 Spring CBH1838
44 Panel See Contrast table(2)
45 Screw IMS20P030FZK
46 Detach Grille Assy See Contrast table(2)
47 Screw BPZ20P120FZK
48 Button(Detachable) CAC5869
49 Button(Eject) See Contrast table(2)
50 Button(REW) See Contrast table(2)
51 Button(FF) See Contrast table(2)
52 Button(F,A,Cross) See Contrast table(2)
53 Button(-,-) See Contrast table(2)
54 Button(1-6,D,B) CAC5881
55 Button(+,-) See Contrast table(2)
56 Button(SO/OFF,PGM) See Contrast table(2)
57 Spring CBH1836
58 Spring CBH2103
59 Grille Unit See Contrast table(2)
60 Cover See Contrast table(2)
61 Keyboard Unit See Contrast table(2)
62 LCD(LCD901) CAW1512
63 Connector(CN901) CKS3580
64 Holder CNC8054
65 Connector CNV5586
66 Rubber CNV5587
67 Holder CNV5589
68 Lighting Conductor CNV5752
69 Case Assy CXB3520
70 IC(IC501) TDA7384
71 Fuse(10A)(FU951) CEK1136
72 Transistor(Q804) 2SD2396
73 Cassette Mechanism Assy EXK3450

6
KEH-1900R,1930R
(2) CONTRAST TABLE
KEH-1900R/X1M/EW and KEH-1930R/X1M/EW are constructed the same except for the following:
Part No.
Mark No. Description KEH-1900R/X1M/EW KEH-1930R/X1M/EW
30 Chassis Unit CXB3224 CXB3225
41 Panel Unit CXB3714 CXB3716
42 Door CAT2028 CAT2037
44 Panel CNS5211 CNS5212
46 Detach Grille Assy CXB3376 CXB3373
49 Button(Eject) CAC5870 CAC5871
50 Button(REW) CAC5872 CAC5873
51 Button(FF) CAC5874 CAC5875
52 Button(Cross,A,F) CAC6127 CAC5877
53 Button(-,-) CAC5878 CAC5879
55 Button(+,-) CAC6128 CAC5883
56 Button(SO/OFF,PGM) CAC5884 CAC5885
59 Grille Unit CXB4038 CXB4039
60 Cover CNS5209 CNS5210
61 Keyboard Unit CWM6272 CWM6274

7
KEH-1900R,1930R
2.3 CASSETTE MECHANISM ASSY

8
KEH-1900R,1930R
1 Screw BSZ23P050FMC
2 Washer CBG1003
3 Connector(CN1) CKS2829
4 Screw(M2x5) EBA1038
5 Screw(M2x2.5) EBA1037
6 Spring EBH1554
7 Spring EBH1555
8 Spring EBH1556
9 Spring EBH1603
10 Spring EBH1591
11 Spring EBH1559
12 Spring EBH1593
13 Spring EBH1561
14 Spring EBH1562
15 Spring EBH1563
16 Spring EBH1590
17 Spring EBH1565
18 Spring EBH1566
19 Spring EBH1567
20 Spring EBH1568
21 Spring EBH1569
22 Spring EBH1571
23 Spring EBH1579
24 Head Base ENC1475
25 Lever ENC1429
26 Lever ENC1430
27 Lever ENC1431
28 Lever ENC1432
29 Arm ENC1433
30 Arm ENC1434
31 Arm ENC1480
32 Arm ENC1476
33 Bracket ENC1512
34 Lever ENC1523
35 Arm ENC1524
36 Frame ENC1440
37 Holder ENC1441
38 Lever ENC1446
39 Lever ENC1478
40 Belt ENT1027
41 Gear ENV1504
42 Gear ENV1470
43 Gear ENV1517
44 Lever ENV1472
45 Gear ENV1510
46 Gear ENV1475
47 Gear ENV1512
48 Gear ENV1513
49 Gear ENV1502
50 Lever ENV1480
51 Lever ENV1487
52 Pinch Holder Unit EXA1516
53 Arm ENV1519
* 54 PCB ENP1161
55 Switch(EJECT)(S4) ESG1006
56 Switch(FWD/REV)(S3) ESH1006
57 Switch(LOAD)(S1) ESN1016
58 Switch(MUTE)(S2) ESN1017
59 Head Assy(HD1) EXA1466
60 Motor Unit(M1) EXA1467
61 Flywheel Unit EXA1547
62 •••••
63 Arm Unit EXA1447
64 Arm Unit EXA1448
65 Arm Unit EXA1550
66 Reel Unit EXA1450
67 Pinch Holder ENV1466
68 Pinch Roller ENV1518
69 Pinch Holder ENV1467
70 Pinch Holder Unit EXA1515
71 Chassis Unit EXA1498
72 Arm ENV1524
73 Washer CBF-167
74 Resistor(R1) RD1/4HM472J
75-78 •••••
79 Cover ENC1452
80 •••••
81 Spring EBH1592
82 Washer CBF1051
Mark No. Description Part No. Mark No. Description Part No.
-CASSETTE MECHANISM ASSY SECTION PARTS LIST

9
KEH-1900R,1930R
A
B
D
C
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM
3.1 BLOCK DIAGRAM
-KEH-1900R/X1M/EW

10
KEH-1900R,1930R
A
1234
B
C
D
1234
A-a A-b
A-a A-b
A-b
A-a
Large size
SCH diagram
Guide page
Detailed page
CASSETTE
PCB
FM/AM TUNER UNIT
TAPE:-24dBs
A
B
D
D
3.2 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