Pioneer KEH-P2800 - Radio / Cassette Player 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 1998 K-ZZB. DEC. 1998 Printed in Japan
ORDER NO.
CRT2268
MULTI-CD CONTROL HIGH POWER CASSETTE PLAYER WITH FM/AM TUNER
KEH-P2800 X1M/UC
Service
Manual
KEH-P3850 X1M/ES
KEH-P2800/X1M/UC
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.
-This service manual does not describe the CD test mode.
For the operations in the CD test mode, refer to the CD player's Service Manual.
CONTENTS
1. SAFETY INFORMATION............................................2
2. EXPLODED VIEWS AND PARTS LIST ......................2
3. SCHEMATIC DIAGRAM.............................................8
4. PCB CONNECTION DIAGRAM................................18
5. ELECTRICAL PARTS LIST........................................26
6. ADJUSTMENT.........................................................32
7. GENERAL INFORMATION.......................................34
7.1 PARTS ................................................................34
7.1.1 IC...............................................................34
7.1.2 DISPLAY ...................................................38
7.2 DISASSEMBLY ..................................................39
7.3 BLOCK DIAGRAM .............................................40
8. OPERATIONS AND SPECIFICATIONS....................41

2
KEH-P2800,P3850
2. EXPLODED VIEWS AND PARTS LIST
2.1 PACKING
3
6
10
2
9
8
7
5
4
14
1
20
11
15
13
12
18
19
16
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.
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-P2800,P3850
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-P2800/X1M/UC KEH-P3850/X1M/ES
1 Cord Assy CDE5805 CDE5805
2 Spring CBH1650 CBH1650
3 Screw Assy CEA2351 CEA2351
4 Screw CBA1304 CBA1304
* 5 Polyethylene Bag CEG-127 CEG-127
6 Screw(x4) CRZ50P090FMC CRZ50P090FMC
7 Screw(x4) TRZ50P080FMC TRZ50P080FMC
* 8 Polyethylene Bag CEG-158 CEG-158
9 Handle(x2) CNC5395 CNC5395
10 Bush CNV3930 CNV3930
11 Polyethylene Bag CEG1173 CEG-162
12 Carton CHG3598 CHG3599
13 Contain Box CHL3598 CHL3599
14 Protector CHP1622 CHP1622
15 Protector CHP1623 CHP1623
16 Owner’s Manual CRD2804 CRD2801
17 Owner’s Manual Not used CRD2802
18 Installation Manual CRD2805 CRD2803
* 19 Card ARY1048 Not used
20 Case Assy CXB3520 CXB3520
-Owner's Manual, Installation Manual
Model Part No. Language
KEH-P2800/X1M/UC CRD2804 English,French,Spanish
CRD2805 English,French,Spanish
KEH-P3850/X1M/ES CRD2801 English,Spanish,Portuguese(B)
CRD2802 Chinese,Arabic
CRD2803 English,Spanish,Portuguese(B),Chinese,Arabic

4
KEH-P2800,P3850
2.2 EXTERIOR

5
KEH-P2800,P3850
1 Screw BSZ26P050FMC
2 Screw BSZ30P100FMC
3 Cord Assy CDE5805
4 Case CNB2481
5 Panel CNS5214
6 Screw BSZ30P055FUC
7 Screw BSZ30P060FMC
8 Screw BSZ30P100FMC
9 Holder CNC5704
10 Cushion CNM4870
11 Insulator CNM5025
12 Tuner Amp Unit See Contrast table(2)
13 Screw BPZ26P080FMC
14 Screw BSZ26P080FMC
15 Screw BSZ26P140FMC
16 FM/AM Tuner Unit See Contrast table(2)
17 Holder CNC6554
18 Pin Jack(CN401) CKB1035
19 Plug(CN601) CKM1270
20 Connector(CN604) CKS3362
21 Connector(CN602) CKS3408
22 Connector(CN603) CKS3581
23 Antenna Jack(CN301) CKX1056
24 Panel CNB2245
25 Holder CNC5399
26 Holder CNC6216
27 Heat Sink CNC6217
28 Holder CNC6531
29 Holder CNC6845
30 Chassis Unit CXA9851
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 CXB3715
42 Door CAT2028
43 Spring CBH1838
44 Screw IMS20P030FZK
45 Detach Grille Assy See Contrast table(2)
46 Screw BPZ20P120FZK
47 Button(Detachable) CAC5868
48 Button(Eject) CAC5870
49 Button(REW) CAC5872
50 Button(FF) CAC5874
51 Button(F,A,Cross) CAC5876
52 Button(-,-) CAC5878
53 Button(1-6,D,B) CAC5880
54 Button(+,-) CAC5882
55 Button(SO/OFF,PGM) CAC5884
56 Spring CBH1836
57 Spring CBH2103
58 Grille See Contrast table(2)
59 Cover CNS5209
60 Keyboard Unit CWM6273
61 LCD(LCD901) CAW1513
62 Connector(CN901) CKS3580
63 Holder CNC8054
64 Connector CNV5586
65 Rubber CNV5587
66 Holder CNV5589
67 Lighting Conductor CNV5752
68 Case Assy CXB3520
69 Transistor(Q804) 2SD2396
70 Cassette Mechanism Assy EXK3450
71 Fuse(FU951)(10A) CEK1136
72 IC(IC501) TDA7384
* 73 Cord See Contrast table(2)
(1) EXTERIOR SECTION PARTS LIST
Mark No. Description Part No. Mark No. Description Part No.
(2) CONTRAST TABLE
KEH-P2800/X1M/UC and KEH-P3850/X1M/ES are constructed the same except for the following:
Part No.
Mark No. Description KEH-P2800/X1M/UC KEH-P3850/X1M/ES
12 Tuner Amp Unit CWM6276 CWM6349
16 FM/AM Tuner Unit CWE1467 CWE1486
45 Detach Grille Assy CXB3369 CXB3375
58 Grille CNS5200 CNS5201
* 73 Cord CDC1043 Not used

6
KEH-P2800,P3850
2.3 CASSETTE MECHANISM ASSY

7
KEH-P2800,P3850
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

8
KEH-P2800,P3850
A
1234
B
C
D
1234
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
FM/AM TUNER UNIT
CWE1467(/UC)
CWE1486(/ES)
CASSETTE
PCB
24dBs
220
B
D
D

9
KEH-P2800,P3850
5678
A
B
C
D
5678
A
A-b
TUNER AMP UNIT
KEYBOARD UNIT
TAPE:-25dBs TAPE:-4dBs
FM:+5dBs
AM:-1dBs
CD:+10dBs
TAPE:22dBs
BPGM
A
C
C

10
KEH-P2800,P3850
A
1234
B
C
D
1234
A-a
A-a A-b
FM/AM TUNER UNIT
CWE1467(/UC) CWE1486(/ES)
B

11
KEH-P2800,P3850
5678
A
B
C
D
5678
A-a
A-a A-b
CASSETTE
PCB
24dBs
220
D
D

12
KEH-P2800,P3850
A
1234
B
C
D
1234
A-a A-b
A-b
TUNER AMP UNIT
TAPE:-25dBs TAPE:-4dBs
FM:+5dBs AM:-1dBs CD:+10dBs
TAPE:22dBs
A

13
KEH-P2800,P3850
5678
A
B
C
D
5678
A-b
A-a A-b
KEYBOARD UNIT
BPGM
C
C

14
KEH-P2800,P3850
A
1234
B
C
D
1234
3.2 FM/AM TUNER UNIT
B
3
1
2
FM/AM TUNER
D1D2 RD39JSRD39JS
R1
R2
2R2M
2R2M
D6 MA157
-CWE1467 (KEH-P2800/X1M/UC)
B

15
KEH-P2800,P3850
5678
A
B
C
D
5678
B
NER UNIT
IFC
A

16
KEH-P2800,P3850
A
1234
B
C
D
1234
B
3
1
2
FM/AM TUNER
D1D2 RD39JSRD39JS
R1
R2
2R2M
2R2M
D6 MA157
-CWE1486 (KEH-P3850/X1M/ES)
B

17
KEH-P2800,P3850
5678
A
B
C
D
5678
B
NER UNIT
IFC
A

18
KEH-P2800,P3850
A
1234
B
C
D
1234
A
CN901
TUNER AMP UNIT
4. PCB CONNECTION DIAGRAM
4.1 TUNER AMP UNIT
NOTE FOR PCB DIAGRAMS
1. The parts mounted on this PCB
include all necessary parts for
several destination.
For further information for
respective destinations, be sure
to check with the schematic
diagram.
2. Viewpoint of PCB diagrams
Capacitor
Connector
P.C.Board Chip Part
SIDE A
SIDE B
A
C
CORD ASSY

19
KEH-P2800,P3850
5678
A
B
C
D
5678
D
A
CN1
B
SIDE A
2
1
3
IP-BUS

20
KEH-P2800,P3850
A
1234
B
C
D
1234
A
A
TUNER AMP UNIT