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Service
Manual
HIGH POWER CASSETTE PLAYER WITH FM/AM TUNER
KEH-1900
KEH-1950
- This service manual should be used together with the following manual(s):
Model No.
CX-644
TE
L 13942296513
CONTENTS
1. SAFETY INFORMATION............................................2
2. EXPLODED VIEWS AND PARTS LIST ......................2
4. PCB CONNECTION DIAGRAM................................18
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5. ELECTRICAL PARTS LIST........................................26
6. ADJUSTMENT .........................................................30
.
PIONEER CORPORATION
PIONEER ELECTRONICS SERVICE INC.
PIONEER ELECTRONIC [EUROPE] N.V.
PIONEER ELECTRONICS ASIACENTRE PTE.LTD. 253 Alexandra Road, #04-01, Singapore 159936
C PIONEER CORPORATION 1999
http://www.xiaoyu163.com
Order No.
Mech. Module Remarks
CRT1800
2M
x
ao
y
i
4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan
P.O.Box 1760, Long Beach, CA 90801-1760 U.S.A.
Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium
http://www.xiaoyu163.com
8
KEH-1900/X1M/UC
X1M/ES
Cassette Mech. Module:Circuit Description, Mech.Description, Disassembly
Q Q
3
6 7
1 3
7. GENERAL INFORMATION.......................................32
7.1 DISASSEMBLY ..................................................32
7.2 PARTS ................................................................33
7.2.1 IC ...............................................................33
7.2.2 DISPLAY ...................................................36
u163
8. OPERATIONS AND SPECIFICATIONS ....................37
.
2 9
9 4
2 8
1 5
0 5
8
2 9
9 4
m
co
K-ZZY. NOV. 1999 Printed in Japan
9 9
ORDER NO.
CRT2424
X1M/UC
2 8
9 9

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Summarization of Contents

EXPLODED VIEWS AND PARTS LIST
PACKING
Details on how the product is packaged for shipping and handling.
PACKING SECTION PARTS LIST
List of parts included in the product's packaging.
BLOCK DIAGRAM AND SCHEMATIC DIAGRAM
BLOCK DIAGRAM
High-level functional representation of the system's units and their interconnections.
PCB CONNECTION DIAGRAM
TUNER AMP UNIT PCB CONNECTION DIAGRAM
Connection diagram for the Tuner Amplifier unit's printed circuit board.
FM/AM TUNER UNIT PCB CONNECTION DIAGRAM
Connection diagram for the FM/AM Tuner unit's printed circuit board.
KEYBOARD UNIT PCB CONNECTION DIAGRAM
Connection diagram for the Keyboard unit's printed circuit board.
CASSETTE PCB CONNECTION DIAGRAM
Connection diagram for the Cassette mechanism's printed circuit board.
ELECTRICAL PARTS LIST
MISCELLANEOUS ELECTRICAL PARTS LIST
List of miscellaneous electrical parts including ICs, transistors, diodes, and inductors.
RESISTORS LIST
Comprehensive list of resistors with their part numbers and circuit symbols.
CAPACITORS LIST
Comprehensive list of capacitors with their part numbers and circuit symbols.
COILS, FILTERS, AND OTHER PARTS LIST
List of coils, filters, resonators, and other electrical components.
ADJUSTMENT
FM ADJUSTMENT
Procedures for tuning and adjusting the FM tuner for optimal reception and performance.
GENERAL INFORMATION
DISASSEMBLY PROCEDURES
Step-by-step guide for disassembling the product's main units.
IC DETAILS AND PIN FUNCTIONS
Information on specific ICs, including pin functions and their roles.
DISPLAY UNIT DETAILS
Information on the display unit's segments and common connections.
OPERATIONS AND SPECIFICATIONS
BASIC OPERATION
Initial steps and basic functions for operating the device, including listening to music.
TUNER AND CASSETTE OPERATION
Detailed instructions on tuning stations and operating the cassette player.
SPECIFICATIONS (KEH-1900/X1M/UC)
Detailed technical data for the KEH-1900/X1M/UC model.
SPECIFICATIONS (KEH-1950/X1M/ES)
Detailed technical data for the KEH-1950/X1M/ES model.

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