Pioneer KEH-P4750 - 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. 501 Orchard Road, #10-00, Wheelock Place, Singapore 238880
C PIONEER ELECTRONIC CORPORATION 1998
K-ZEM. FEB. 1998 Printed in Japan
ORDER NO.
CRT2169
MULTI-CD CONTROL HIGH POWER CASSETTE PLAYER WITH FM/AM TUNER
Se r v i c e
M a nu a l
KEH-P424 X1M/UC
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.
- 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.
KEH-P4700 X1M/UC
• KEH-P424/X1M/UC
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 .......................................28
6. ADJUSTMENT ........................................................35
7. GENERAL INFORMATION ......................................37
7.1 PARTS.................................................................37
7.1.1 IC ...............................................................37
7.1.2 DISPLAY ...................................................41
7.2 DISASSEMBLY ..................................................42
7.3 BLOCK DIAGRAM..............................................43
8. OPERATIONS AND SPECIFICATIONS ...................44
KEH-P4750 X1M/ES
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TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

Summary

SAFETY INFORMATION

EXPLODED VIEWS AND PARTS LIST

PACKING SECTION PARTS LIST

List of parts included in the unit's packing.

EXTERIOR SECTION PARTS LIST

List of external components and their part numbers.

CASSETTE MECHANISM MODULE SECTION PARTS LIST

Parts list specific to the cassette mechanism.

SCHEMATIC DIAGRAM

OVERALL CONNECTION DIAGRAM (GUIDE PAGE)

High-level overview of unit connections and component relationships.

TUNER AMP UNIT SCHEMATIC

Detailed circuit diagram for the FM/AM tuner amplifier section.

CASSETTE MECHANISM MODULE SCHEMATIC

Detailed circuit diagram for the cassette mechanism.

PCB CONNECTION DIAGRAM

TUNER AMP UNIT PCB LAYOUT

Component placement and routing for the tuner amp PCB.

KEYBOARD UNIT PCB LAYOUT

Component placement for the keyboard unit PCB.

ELECTRICAL PARTS LIST

RESISTORS AND CAPACITORS

Parts list detailing resistors and capacitors by symbol and part number.

MISCELLANEOUS COMPONENTS

List of ICs, transistors, diodes, and other electronic parts.

ADJUSTMENT PROCEDURES

FM;AM TUNER ADJUSTMENT

Procedures for tuning and aligning the FM/AM reception.

DOLBY B NR ADJUSTMENT

Calibration steps for the Dolby noise reduction system.

GENERAL INFORMATION

IC SPECIFICATIONS AND PINOUTS

Detailed information on integrated circuits and their pin assignments.

KEYBOARD UNIT DISPLAY

Information on the keyboard unit's display interface.

DISASSEMBLY PROCEDURES

UNIT CASE AND MODULE REMOVAL

Instructions for removing the outer case and internal modules.

TUNER AMP UNIT REMOVAL

Specific steps for removing the tuner amplifier unit.

BLOCK DIAGRAM

OPERATIONS AND SPECIFICATIONS

BASIC OPERATION GUIDE

Instructions for basic functions like listening to music and selecting sources.

SPECIFICATIONS SUMMARY

Technical performance data for FM tuner, AM tuner, and cassette player.

Pioneer KEH-P4750 Specifications