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Service
Manual ORDER NO.
CRT2307
MULTI-CD CONTROL HIGH POWER CASSETTE PLAYER WITH FM/AM TUNER
KEH-P7850 X1N/ES
NOTE:
- See the separate manual CX-631(CRT1640) for the cassette mechanism description.
- The cassette mechanism assy employed in this model is one of 2L series.
- Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation.
"Dolby" and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation.
CONTENTS
1. SAFETY INFORMATION ...........................................2 7. GENERAL INFORMATION ......................................38
2. EXPLODED VIEWS AND PARTS LIST......................2 7.1 PARTS.................................................................38
3. SCHEMATIC DIAGRAM ..........................................10 7.1.1 IC ...............................................................38
4. PCB CONNECTION DIAGRAM ...............................20 7.1.2 DISPLAY ...................................................43
5. ELECTRICAL PARTS LIST .......................................30 7.2 DIAGNOSIS........................................................44
6. ADJUSTMENT ........................................................36 7.2.1 DISASSEMBLY .........................................44
7.2.2 TEST MODE .............................................45
7.3 BLOCK DIAGRAM..............................................48
8. OPERATIONS AND SPECIFICATIONS ...................49
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-ZZS. NOV. 1998 Printed in Japan
KEH-P7850
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
7 4
2
8
5
6
10 18
3
11
13
9
19
16
1
12
20
17
14
15
2
KEH-P7850
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
Mark No. Description Part No. Mark No. Description Part No.
1 Cord Assy CDE5758 16 Protector CHP2101
* 2 Accessory Assy CEA2350-/N 17 Protector CHP2102
3 Spring CBH1650 18 Remote Control Assy CXB3456
4 Screw Assy CEA2351 19 Case CXB3520
5 Screw CBA1304 20-1 Owner's Manual CRD2762
* 6 Polyethylene Bag CEG-127 20-2 Owner's Manual CRD2763
7 Screw CRZ50P090FMC 20-3 Installation Manual CRD2764
8 Screw TRZ50P080FMC
* 9 Polyethylene Bag CEG-158
10 Handle CNC5395
11 Bush CNV3930
12 Polyethylene Bag CEG-162
13 Battery CEX1030
14 Carton CHG3552
15 Contain Box CHL3552
- Owner's Manual, Installation Manual
Model Part No. Language
KEH-P7850/X1N/ES CRD2762 English, Spanish, Portuguese(B)
CRD2763 Chinese, Arabic
CRD2764 English, Spanish,
Portuguese(B), Chinese, Arabic
3
KEH-P7850
2.2 EXTERIOR
4
KEH-P7850
(1) EXTERIOR SECTION PARTS LIST
Mark No. Description Part No. Mark No. Description Part No.
1 Screw BMZ30P040FMC 46 Insulator CNM6190
2 Screw BSZ26P050FMC 47 Insulator CNM6257
3 Screw BSZ30P050FMC 48 Heat Sink CNR1505
4 Cord Assy CDE5758 49 Insulator CNV5792
5 Fuse(10A) CEK1136 50 FM/AM Tuner Unit CWE1486
6 Case CNB2350 51 Holder CNC6554
7 Holder CNC6798 52 Chassis Unit CXB3048
8 Shield CNC7365 53 Screw ISS26P055FUC
9 Spacer CNM5488 54 Detach Grille Assy CXB3439
10 Panel CNS5148 55 Screw BPZ20P060FMC
11 Cap CNV2680 56 Screw BPZ20P080FZK
12 Screw BSZ30P050FMC 57 Button(OPEN) CAC5804
13 Screw BSZ30P200FMC 58 Button(EJECT) CAC5805
14 Cord CDE5176 59 Button(SOURCE) CAC5806
15