Sony HT-DDW7500 / HT-DDW8500 / STR-KM7500 Service Manual ▷ View online
STR-KM7500
3
SECTION 1
SERVICING NOTES
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
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
• 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.
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
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 viscou-s (sticky, less prone to fl ow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
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.
also be added to ordinary solder.
NOTE OF REPLACING THE IC3511 AND IC3513 ON
THE HDMI BOARD
IC3511 and IC3513 on the HDMI board cannot exchange with sin-
gle. When IC3511 and IC3513 on the HDMI board are damaged,
exchange the entire mounted board.
THE HDMI BOARD
IC3511 and IC3513 on the HDMI board cannot exchange with sin-
gle. When IC3511 and IC3513 on the HDMI board are damaged,
exchange the entire mounted board.
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.
aged by heat.
TABLE OF CONTENTS
1.
SERVICING NOTES............................................. 3
2. DISASSEMBLY
2-1. Disassembly Flow .............................................................. 4
2-2. Case .................................................................................... 4
2-3. Back Panel Block ............................................................... 5
2-4. Front Panel Block .............................................................. 5
2-5. Main Block ........................................................................ 6
2-6. Heatsink Block, Main Board ............................................. 6
2-2. Case .................................................................................... 4
2-3. Back Panel Block ............................................................... 5
2-4. Front Panel Block .............................................................. 5
2-5. Main Block ........................................................................ 6
2-6. Heatsink Block, Main Board ............................................. 6
3.
TEST MODE .......................................................... 7
4.
ELECTRICAL CHECK ......................................... 9
5. DIAGRAMS
5-1. Block Diagram — Display Section — .............................11
5-2. Block Diagram — Video Section — ............................... 12
5-3. Block Diagram — HDMI Section — .............................. 13
5-4. Block Diagram — Standby dcdc Section — ................... 14
5-5. Block Diagram — Digital (1/2) Section — ..................... 15
5-6. Block Diagram — Digital (2/2) Section — ..................... 16
5-7. Block Diagram — Connection Section — ...................... 17
5-8. Block Diagram — Main Section — ................................ 18
5-9. Printed Wiring Board — Main Board — ......................... 20
5-10. Schematic Diagram — Main Board (1/4) — ................... 21
5-11. Schematic Diagram — Main Board (2/4) — ................... 22
5-12. Schematic Diagram — Main Board (3/4) — ................... 23
5-13. Schematic Diagram — Main Board (4/4) — ................... 24
5-14. Printed Wiring Board — Video Board — ........................ 25
5-15. Schematic Diagram — Video Board — ........................... 26
5-16. Printed Wiring Board — Video 2 Board —. .................... 27
5-17. Schematic Diagram — Video 2 Board — ........................ 28
5-18. Printed Wiring Board — HDMI Board (1/2) — .............. 29
5-19. Printed Wiring Board — HDMI Board (2/2) — ............. 30
5-20. Schematic Diagram — HDMI Board (1/2) — ................. 31
5-21. Schematic Diagram — HDMI Board (2/2) — ................. 32
5-22. Printed Wiring Board — Standby DCDC Board — ........ 33
5-23. Schematic Diagram — Standby DCDC Board — ........... 34
5-24. Printed Wiring Board — Display Board — ..................... 35
5-25. Schematic Diagram — Display Board — ........................ 36
5-26. Printed Wiring Board — Digital Board (1/2) — ............. 37
5-27. Printed Wiring Board — Digital Board (2/2) — ............. 38
5-28. Schematic Diagram — Digital Board (1/4) — ................ 39
5-29. Schematic Diagram — Digital Board (2/4) — ................ 40
5-30. Schematic Diagram — Digital Board (3/4) — ................ 41
5-31. Schematic Diagram — Digital Board (4/4) — ................ 42
5-32. Printed Wiring Board — Connection Board — ............... 43
5-33. Schematic Diagram — Connection Board — .................. 44
5-34. Printed Wiring Board — Headphone Board — ............... 45
5-35. Schematic Diagram — Headphone Board — .................. 45
5-36. Printed Wiring Board — Power Key Board — ............... 45
5-37. Schematic Diagram — Power Key Board — .................. 45
5-38. Printed Wiring Board — Thermal Sensor Board — ........ 46
5-39. Schematic Diagram — Thermal Sensor Board — ........... 46
5-40. Printed Wiring Board — AC Select Board — ................. 47
5-41. Schematic Diagram — AC Select Board — .................... 47
5-2. Block Diagram — Video Section — ............................... 12
5-3. Block Diagram — HDMI Section — .............................. 13
5-4. Block Diagram — Standby dcdc Section — ................... 14
5-5. Block Diagram — Digital (1/2) Section — ..................... 15
5-6. Block Diagram — Digital (2/2) Section — ..................... 16
5-7. Block Diagram — Connection Section — ...................... 17
5-8. Block Diagram — Main Section — ................................ 18
5-9. Printed Wiring Board — Main Board — ......................... 20
5-10. Schematic Diagram — Main Board (1/4) — ................... 21
5-11. Schematic Diagram — Main Board (2/4) — ................... 22
5-12. Schematic Diagram — Main Board (3/4) — ................... 23
5-13. Schematic Diagram — Main Board (4/4) — ................... 24
5-14. Printed Wiring Board — Video Board — ........................ 25
5-15. Schematic Diagram — Video Board — ........................... 26
5-16. Printed Wiring Board — Video 2 Board —. .................... 27
5-17. Schematic Diagram — Video 2 Board — ........................ 28
5-18. Printed Wiring Board — HDMI Board (1/2) — .............. 29
5-19. Printed Wiring Board — HDMI Board (2/2) — ............. 30
5-20. Schematic Diagram — HDMI Board (1/2) — ................. 31
5-21. Schematic Diagram — HDMI Board (2/2) — ................. 32
5-22. Printed Wiring Board — Standby DCDC Board — ........ 33
5-23. Schematic Diagram — Standby DCDC Board — ........... 34
5-24. Printed Wiring Board — Display Board — ..................... 35
5-25. Schematic Diagram — Display Board — ........................ 36
5-26. Printed Wiring Board — Digital Board (1/2) — ............. 37
5-27. Printed Wiring Board — Digital Board (2/2) — ............. 38
5-28. Schematic Diagram — Digital Board (1/4) — ................ 39
5-29. Schematic Diagram — Digital Board (2/4) — ................ 40
5-30. Schematic Diagram — Digital Board (3/4) — ................ 41
5-31. Schematic Diagram — Digital Board (4/4) — ................ 42
5-32. Printed Wiring Board — Connection Board — ............... 43
5-33. Schematic Diagram — Connection Board — .................. 44
5-34. Printed Wiring Board — Headphone Board — ............... 45
5-35. Schematic Diagram — Headphone Board — .................. 45
5-36. Printed Wiring Board — Power Key Board — ............... 45
5-37. Schematic Diagram — Power Key Board — .................. 45
5-38. Printed Wiring Board — Thermal Sensor Board — ........ 46
5-39. Schematic Diagram — Thermal Sensor Board — ........... 46
5-40. Printed Wiring Board — AC Select Board — ................. 47
5-41. Schematic Diagram — AC Select Board — .................... 47
6.
EXPLODED VIEWS
6-1. Front Panel Section .......................................................... 61
6-2. Back Panel Section .......................................................... 62
6-3. Main
6-2. Back Panel Section .......................................................... 62
6-3. Main
Section
.................................................................... 63
7.
ELECTRICAL PARTS LIST ......................... 64
STR-KM7500
4
SECTION 2
DISASSEMBLY
• This set can be disassembled in the order shown below.
2-1. DISASSEMBLY FLOW
Note: Follow the disassembly procedure in the numerical order given.
2-2. CASE
2-2. CASE
(Page
(Page
4)
2-3. BACK PANEL BLOCK
(Page
(Page
5)
2-4. FRONT PANEL BLOCK
(Page
(Page
5)
2-5. MAIN
BLOCK
(Page
6)
2-6. HEATSINK BLOCK, MAIN BOARD
(Page
(Page
6)
SET
1
three screws
(BVTP3
u 8)
4
case
2
two screws
(BVST4
u 8)
2
two screws
(BVST4
u 8)
3
3
STR-KM7500
5
2-3. BACK PANEL BLOCK
2-4. FRONT PANEL BLOCK
ql
1
five screws
(+BVTP
3
u 8)
6
two screws
(+BVTP
3
u 8)
7
one screw
(+BVTP
3
u 8)
2
four screws
(+BVTP
3
u 8)
3
five screws
(+BVTP
3
u 8)
4
one screw
(+BVTP
3
u 8)
5
one screw
(+BVTP
3
u 8)
qa
wire (flat type) (9 core)
(CN2204,
CN2205)
qd
wire (flat type) (21 core)
(CN2200)
ql
CNP904 (4P)
qk
CN905 (5P)
qj
CNP923 (2P)
qh
CNP922 (2P)
qg
CN3509 (5P)
q;
CN2102 (9P)
9
CN2103 (4P)
qs
CN2100 (7P)
qf
CNP201 (3P)
8
wire (flat type) (17 core)
(CN3511)
w;
CONNECTION Board
1
CNP790 (4P)
2
CN558 (6P)
4
one lead
5
FIVE SCREWS
(+BVTP 3 x 8)
3
one lead
6
front panel section
STR-KM7500
6
2-5. MAIN BLOCK
2-6. HEATSINK BLOCK, MAIN BOARD
two screws
(+BVTP
(+BVTP
3
× 8)
MAIN board section
two screws
(+BVTP
(+BVTP
3
× 8)
one screw
(+BVTP
(+BVTP
3
× 8)
CN553 (3P)
CN554 (5P)
one screw
(+BVTP
(+BVTP
3
× 8)
Support (G73) Bracket
6
MAIN board
9
heatsink block
4
Remove the
fourty two solders.
2
fourteen screws
(transistor)
5
seven transistors MN2488-OPY-MK
(Q553, Q603, Q653, Q703,
Q753, Q803, Q853)
5
seven transistors
MP1620-OPY-MK
(Q554, Q604, Q654, Q704,
Q754, Q804, Q854)
3
fourteen sheets
1
two screws
(+BVTP
3
u 8)
7
one screw
(+BVTP
3
u 8)
8
INSULATOR board