MICROFILM
SERVICE MANUAL
MINI Hi-Fi COMPONENT SYSTEM
SPECIFICATIONS
HCD-GRX9000/RX900
Photo: HCD-RX900
Dolby noise reduction manufactured under license
from Dolby Laboratories Licensing Corporation.
"DOLBY" and the double-D symbol
a are trade-
marks of Dolby Laboratories Licensing Corporation.
East European Model
CIS Model
HCD-RX900
E Model
HCD-GRX9000
Model Name Using Similar Mechanism
HCD-H991AV
CD Mechanism Type
CDM38LH-5BD29AL
Base Unit Type
BU-5BD29AL
Optical Pick-up Type
KSS-213D/Q-NP
Model Name Using Similar Mechanism HCD-GRX7/RX77S
Tape Transport Mechanism Type
TCM-230AWR1/
230PWR1
HCD-GRX9000/RX900 are the Amplifier,
CD player, Tape Deck and Tuner section
in MHC-GRX9000/RX900.
CD
Section
TAPE
DECK
Section
Continued on next page
2
3
1.
SERVICING NOTES ............................................... 3
2.
GENERAL
Location of Controls ....................................................... 6
Setting the Time .............................................................. 7
3.
DISASSEMBLY ......................................................... 8
4.
TEST MODE .............................................................. 11
5.
MECHANICAL ADJUSTMENTS ....................... 13
6.
ELECTRICAL ADJUSTMENTS
DECK Section ................................................................. 13
TUNER Section .............................................................. 16
CD Section ...................................................................... 18
7.
DIAGRAMS ................................................................. 20
7-1. Block Diagram TUNER Section
(East European, CIS models only) .............................. 21
7-2. Block Diagram CD Section ...................................... 23
7-3. Block Diagram TAPE DECK Section ...................... 25
7-4. Block Diagram MAIN Section (1/2) ........................ 27
7-5. Block Diagram MAIN Section (2/2) ........................ 29
7-6. Block Diagram DISPLAY/KEY CONTROL/
POWER SUPPLY Section ........................................... 31
7-7. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 33
7-8. Printed Wiring Board TUNER Section
(East European, CIS models only) .............................. 34
7-9. Schematic Diagram TUNER Section
(East European, CIS models only) .............................. 35
7-10. Printed Wiring Board CD Section ........................... 37
7-11. Schematic Diagram CD Section ............................... 39
7-12. Printed Wiring Boards CD MOTOR Section .......... 41
7-13. Schematic Diagram CD MOTOR Section .............. 43
7-14. Printed Wiring Board TAPE DECK Section ........... 45
7-15. Schematic Diagram TAPE DECK Section .............. 47
7-16. Printed Wiring Board LEAF SW Section ............... 49
7-17. Schematic Diagram LEAF SW Section .................. 49
7-18. Printed Wiring Board MAIN Section ...................... 51
7-19. Schematic Diagram MAIN Section (1/4) ............... 53
7-20. Schematic Diagram MAIN Section (2/4) ................ 55
7-21. Schematic Diagram MAIN Section (3/4) ................ 57
7-22. Schematic Diagram MAIN Section (4/4) ................ 59
7-23. Printed Wiring Board PANEL Section .................... 61
7-24. Schematic Diagram PANEL Section ....................... 63
7-25. Printed Wiring Board CD-SW Section .................... 65
7-26. Schematic Diagram CD-SW Section ...................... 65
7-27. Printed Wiring Board HP Section ........................... 67
7-28. Schematic Diagram HP Section .............................. 68
7-29. Printed Wiring Boards POWER AMP Section ....... 69
7-30. Schematic Diagram POWER AMP Section ............ 71
7-31. Printed Wiring Board
TRANSFORMER Section ........................................ 73
7-32. Schematic Diagram
TRANSFORMER Section ........................................ 74
7-33. IC Pin Function Description ........................................... 81
8.
EXPLODED VIEWS ................................................ 86
9.
ELECTRICAL PARTS LIST ............................... 95
TABLE OF CONTENTS
The laser diode in the optical pick-up block may suffer electro-
static break-down because of the potential difference generated
by the charged electrostatic load, etc. on clothing and the human
body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused
on the disc reflective surface by the objective lens in the optical
pick-up block. Therefore, when checking the laser diode emis-
sion, observe from more than 30 cm away from the objective lens.
Notes on chip component replacement
· Never reuse a disconnected chip component.
· Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
Flexible Circuit Board Repairing
· Keep the temperature of the soldering iron around 270 °C dur-
ing repairing.
· Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
· Be careful not to apply force on the conductor when soldering
or unsoldering.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
This appliance is classified as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT MARKING is located on
the rear exterior.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
The following caution label is located inside the unit.
SECTION 1
SERVICING NOTES
4
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK
! OR DOTTED
LINE WITH MARK
! ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.
PART No.
MODEL IDENTIFICATION
Back Panel
MODEL
PART No.
E model
4-996-846-0
Malaysia, Singapore models
4-996-846-1
Saudi Arabia model
4-996-846-2
East European, CIS models
4-996-846-5
5
HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH TURNS OFF.
NOTE FOR INSTALLATION (ROTARY ENCODER)
1 Remove the Case.
3 Pull-out the disc tray.
2 Turn the cam to the
direction of arrow.
BU cam
Groove
Section A
Note:When attaching the Base unit, Insert the
section A into the groove of BU cam.
Note:When attaching the BU cam,
engage the Rotary encoder
switch as shown in the figure.