Pioneer xrc 2 md service manual

Page 1

Pioneer

Service
Manual

ORDER NO.
RRV2165
MD/CD COMPONENT SYSTEM
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
Model .
Type XR-CZMD Power Requ1remenl Remarks
LBWXJ O AC110V
NLWXJ/HK O AC220V
o X-MDX707 is combination of the following components.
0 For speaker system S-CZ-LR, refer to the service manual RRV2156.
Component Model Service manual Remarks
X-MDX707
STEREO MD/CD CASSETTE DECK RECEIVER XR-CzMD RRV2165 This manual.
SPEAKER SYSTEM S-Cz-LR RRV2156

CONTENTS

1- SAFETY INFORMATION ...........................

-- 2 7. GENERAL INFORMATION

2. EXPLODED VIEWS AND PARTS LIST - - 3 7.1 DIAGNOSIS -----
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM 18 7.1.1 TROUBLESHOOTING
4. PCB CONNECTION DIAGRAM ----- 40 7.1.2 DISASSEMBLY/ASSEMBLY
5. PCB PARTS LIST .............................. 54 7.2 PARTS ............................................
6- ADJUSTMENT .................................................... 60 7.21 lo ................

7.2.2 DISPLAY----

8. PANEL FACILITIES AND SPECIFICATIONS ------- 93

PIONEER 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

© PIONEER CORPORATION 1999

T - ZZK AUG. 1999 Printed in Japan

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X-MDX707, XR-C2MD

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.

LABEL CHECK

CLASS I
LASER PRODUCT

Additional Laser Caution
of CD PLAYER
1. Laser Interlock Mechanism

The position of the switch for detecting loading state is
detected by the system microprocessor, and the design
prevents laser diode oscillation when the switch is
pressed physically.
Thus, the interlock will no longer function if the switch is
released physically and deliberatery.
Laser diode oscillation will continue, if pin 33 of
CXA17BZBQ (IC803) on the CD UNIT is connected to
GND, or else the terminals of 0802 are shorted to each
other (fault condition).

2.When the cover is opened, close viewing of the
objective lens with the naked eye will cause exposure
to a Class 1 laser beam.

- IMPORTANT
THIS PIONEER APPARATUS CONTAINS
LASER OF CLASS 1.
SERVICING OPERATION OF THE APPARATUS
SHOULD BE DONE BY A SPECIALLY
INSTRUCTED PERSON.

LASER DIODE CHARACTERISTICS
OF CD PLAYER
MAXIMUM OUTPUT POWER: 5 mW
WAVELENGTH: 760 . 800 nm

LASER DIODE CHARACTERISTICS
OF MD RECORDER
MAXIMUM OUTPUT POWER: 40 mW
WAVELENGTH: 775 . 800 nm

Additional Laser Caution
of MD RECORDER

Control method of the current through a laser diode.
The resistor R166 on the MD MOUNT ASSY (For MD mechanism
assembly) are for the limiting of current through a laser diode.

Control method of the laser output power

The laser pick-up assembly provide the photo-diodes and APC
(Auto Power Control) circuit.

The photo-diode detect output of the laser diode then ICZO1 control
the APC circuit according to the signal voltage of the photo-diode via
ICl 01.

Laser Interlock Switch

The loading position detect switch is set to LOAD ON " position,
ICZO1 get the " LOAD " signal, and hand the laser LDON " signal to
APC (Auto Power Control) circuit of the Laser pick-up assembly.
Then a laser diode can be lighted when the LOAD "signal is
LOAD ON " position.