Sony MEX-BT3900U, Руководство по обслуживанию

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MEX-BT39UW/BT3900U/BT3950U
3
1. SERVICING NOTES
............................................. 3
2. GENERAL
.................................................................. 7
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 13
3-2. Cover ............................................................................... 13
3-3. CD Mechanism Deck (MG-101P-188//Q) ...................... 14
3-4. ANTENNA
Board ........................................................... 14
3-5. MAIN Board (with BT Board) ....................................... 15
3-6. SERVO
Board ................................................................. 15
3-7. Chassis (T) Sub Assy ...................................................... 16
3-8. Roller
Arm Assy .............................................................. 16
3-9. Chassis (OP) Assy ........................................................... 17
3-10. Chucking Arm Sub Assy ................................................. 17
3-11. Sled Motor Assy .............................................................. 18
3-12. Optical Pick-up Section .................................................. 19
3-13. Optical Pick-up ............................................................... 19
4. TEST MODE
............................................................ 19
5. DIAGRAMS
5-1. Block Diagram - AUDIO Section (1/2) - ........................ 20
5-2. Block Diagram - AUDIO Section (2/2) - ........................ 21
5-3. Block
Diagram
- PANEL, POWER SUPPLY Section - ........................... 22
5-4. Printed Wiring Boards - MAIN Section - ....................... 24
5-5. Schematic Diagram - MAIN Section (1/3) - ................... 25
5-6. Schematic Diagram - MAIN Section (2/3) - ................... 26
5-7. Schematic Diagram - MAIN Section (3/3) - ................... 27
5-8. Printed Wiring Board - KEY Board -.............................. 28
5-9. Schematic Diagram - KEY Board - ................................ 29
6. EXPLODED VIEWS
6-1. Main Section ................................................................... 35
6-2. Front Panel Section ......................................................... 36
6-3. CD Mechanism Section (MG-101P-188//Q) .................. 37
7. ELECTRICAL PARTS LIST
.............................. 38
Accessories are given in the last of the electrical parts list.
TABLE OF CONTENTS
SECTION 1
SERVICING NOTES
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
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
fl exible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
Never look into the laser diode emission from right above when
checking it for adjustment. It is feared that you will lose your sight.
If the optical pick-up block is defective, please replace the whole
optical pick-up block.
Never turn the semi-
fi xed resistor located at the side of optical
pick-up block.
optical pick-up
semi-fixed resistor