Sony HCD-ECL77BT, Руководство по обслуживанию

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HCD-ECL77BT/ECL99BT
3
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
The laser beam on this model is concentrated so as to be focused
on the disc re
fl ective surface by the objective lens in the optical
pickup block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(
Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
• Unleaded solder melts at a temperature about 40 °C higher
than ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 °C.
Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!
• Strong viscosity
Unleaded solder is more viscous (sticky, less prone to fl ow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
• Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
1. SERVICING NOTES
............................................. 3
2. DISASSEMBLY
2-1. Disassembly Flow ........................................................... 7
2-2. Side Cover, Top Cover Assy ........................................... 8
2-3. Power Cord (AC1), Rear Panel Block ............................ 9
2-4. CD
Door .......................................................................... 10
2-5. Front Panel Block ........................................................... 10
2-6. Main Chassis Block ........................................................ 11
2-7. MAIN
Board ................................................................... 11
2-8. POWER Board ................................................................ 12
2-9. Fuse (F501) ..................................................................... 13
2-10. FRONT Board ................................................................. 13
2-11. USB Board ...................................................................... 14
2-12. NFC Module ................................................................... 14
2-13. Loader with FFC (TDL-5) (CDM1) ............................... 15
2-14. Service Position .............................................................. 15
3. TEST MODE
............................................................ 16
4. ELECTRICAL CHECK
......................................... 17
5. DIAGRAMS
5-1. Block Diagram (1/2) ....................................................... 18
5-2. Block Diagram (2/2) ....................................................... 19
5-3. Printed Wiring Board - MAIN Board - ........................... 21
5-4. Schematic Diagram - MAIN Board (1/8) - ..................... 22
5-5. Schematic Diagram - MAIN Board (2/8) - ..................... 23
5-6. Schematic Diagram - MAIN Board (3/8) - ..................... 24
5-7. Schematic Diagram - MAIN Board (4/8) - ..................... 25
5-8. Schematic Diagram - MAIN Board (5/8) - ..................... 26
5-9. Schematic Diagram - MAIN Board (6/8) - ..................... 27
5-10. Schematic Diagram - MAIN Board (7/8) - ..................... 28
5-11. Schematic Diagram - MAIN Board (8/8) - ..................... 29
5-12. Printed Wiring Board - FRONT Board - ......................... 30
5-13. Schematic Diagram - FRONT Board - ........................... 31
5-14. Printed Wiring Board - USB Board - .............................. 32
5-15. Schematic Diagram - USB Board - ................................. 33
5-16. Printed Wiring Board - POWER Board - ........................ 34
5-17. Schematic Diagram - POWER Board - .......................... 35
5-18. Schematic Diagram - TUNER Board - ........................... 36
5-19. Printed Wiring Board - TUNER Board - ........................ 37
6. EXPLODED VIEWS
6-1. Cover Section .................................................................. 38
6-2. Rear Panel Section .......................................................... 39
6-3. Front Panel Section ......................................................... 40
6-4. MAIN Board Section ...................................................... 41
6-5. POWER Board Section ................................................... 42
TABLE OF CONTENTS
The SERVICING NOTES contains important information for
servicing. Be sure to read this section before repairing the
unit.