Read Sony MDX-CA790X Service Manual online
2
MDX-CA790X
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK
0
OR DOTTED
LINE WITH MARK
0
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.
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.
1.
SERVICING NOTES
...............................................
3
2.
GENERAL
Location of Controls .......................................................
4
3.
DISASSEMBLY
3-1. Disassembly Flow ...........................................................
8
3-2. Sub Panel Assy ................................................................
9
3-3. Mechanism Deck (MG-165A-138) ................................
9
3-4. MAIN Board ................................................................... 10
3-5. SERVO Board ................................................................. 10
3-6. MD Cover Assy ............................................................... 11
3-7. Float Block ...................................................................... 11
3-8. Lever (LE23) Assy .......................................................... 12
3-9. Holder Assy ..................................................................... 12
3-10. Chucking Arm Assy ........................................................ 13
3-11. Optical Pick-up (KMS-242E) ......................................... 13
3-12. SL Motor Assy (Sled) (M902),
3-5. SERVO Board ................................................................. 10
3-6. MD Cover Assy ............................................................... 11
3-7. Float Block ...................................................................... 11
3-8. Lever (LE23) Assy .......................................................... 12
3-9. Holder Assy ..................................................................... 12
3-10. Chucking Arm Assy ........................................................ 13
3-11. Optical Pick-up (KMS-242E) ......................................... 13
3-12. SL Motor Assy (Sled) (M902),
SP Motor Assy (Spindle) (M901) ................................... 14
4.
ELECTRICAL ADJUSTMENTS
Test Mode ........................................................................ 15
MD Section ..................................................................... 15
Tuner Section .................................................................. 15
MD Section ..................................................................... 15
Tuner Section .................................................................. 15
5.
DIAGRAMS
................................................................. 16
5-1. Block Diagram – SERVO Section – ............................... 20
5-2. Block Diagram – MAIN Section – ................................. 21
5-3. Block Diagram – PANEL/BUS CONTROL/
5-2. Block Diagram – MAIN Section – ................................. 21
5-3. Block Diagram – PANEL/BUS CONTROL/
POWER SUPPLY Section – ........................................... 22
5-4. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 23
5-5. Schematic Diagram – SERVO Section (1/2) – ............... 24
5-6. Schematic Diagram – SERVO Section (2/2) – ............... 25
5-7. Printed Wiring Boards – SERVO Section – ................... 26
5-8. Printed Wiring Boards – MAIN Section – ..................... 27
5-9. Schematic Diagram – MAIN Section (1/3) – ................. 28
5-10. Schematic Diagram – MAIN Section (2/3) – ................. 29
5-11. Schematic Diagram – MAIN Section (3/3) – ................. 30
5-12. Printed Wiring Board – SUB Section – .......................... 31
5-13. Schematic Diagram – SUB Section – ............................. 31
5-14. Printed Wiring Board – KEY Section – ......................... 32
5-15. Schematic Diagram – KEY Section – ............................ 33
5-16. IC Pin Function Description ........................................... 34
5-6. Schematic Diagram – SERVO Section (2/2) – ............... 25
5-7. Printed Wiring Boards – SERVO Section – ................... 26
5-8. Printed Wiring Boards – MAIN Section – ..................... 27
5-9. Schematic Diagram – MAIN Section (1/3) – ................. 28
5-10. Schematic Diagram – MAIN Section (2/3) – ................. 29
5-11. Schematic Diagram – MAIN Section (3/3) – ................. 30
5-12. Printed Wiring Board – SUB Section – .......................... 31
5-13. Schematic Diagram – SUB Section – ............................. 31
5-14. Printed Wiring Board – KEY Section – ......................... 32
5-15. Schematic Diagram – KEY Section – ............................ 33
5-16. IC Pin Function Description ........................................... 34
6.
EXPLODED VIEWS
6-1. Chassis Section ............................................................... 41
6-2. Front Panel Section ......................................................... 42
6-3. Mechanism Deck Section-1 (MG-165A-138) ................ 43
6-4. Mechanism Deck Section-2 (MG-165A-138) ................ 44
6-5. Mechanism Deck Section-3 (MG-165A-138) ................ 45
6-2. Front Panel Section ......................................................... 42
6-3. Mechanism Deck Section-1 (MG-165A-138) ................ 43
6-4. Mechanism Deck Section-2 (MG-165A-138) ................ 44
6-5. Mechanism Deck Section-3 (MG-165A-138) ................ 45
7.
ELECTRICAL PARTS LIST
............................... 46
TABLE OF CONTENTS
This label is located on the bottom of the
chassis.
chassis.
This product is classified as a
CLASS 1 LASER PRODUCT.
CLASS 1 LASER PRODUCT.
CAUTION
INVISIBLE
DO NOT STARE INTO BEAM OR
VIEW DIRECTLY WITH OPTICAL INSTRUMENTS
LASER RADIATION WHEN OPEN
This label is located on the drive unit’s internal
chassis. (Refer to below figure)
chassis. (Refer to below figure)
Caution label
– Upper view –
During service do not take the Optical Pick-up Block apart and do
not adjust the APC circuit. If there is a breakdown in the APC
circuit (including laser diode), replace the entire Optical Pick-up
Block (including SERVO board).
not adjust the APC circuit. If there is a breakdown in the APC
circuit (including laser diode), replace the entire Optical Pick-up
Block (including SERVO board).
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