Table Of Contents - Sony STR-K990 Service Manual
Multichannel av receiver
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Also See for STR-K990:
- Operating instructions manual (80 pages) ,
- Service manual (62 pages)
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Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
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 viscou-s (sticky, less prone to flow)
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.
TE
L 13942296513
About area codes
Th
e area code of the receiver you purchased is
shown on the lower right portion of the rear panel
(see the illustration below).
BACK PANEL
L
L
R
R
ONT A
SURROUND
CENTER
ERS
Any differences in operation, according to the area
code, are clearly indicated in the text, for example,
"Models of area code AA only".
Moreover, it is possible to distinguish the model
by Part No..
Model
US Model
Canadian Model
www
.
http://www.xiaoyu163.com
Part No.
Area code
Part No.
2-897-800-7
2-897-800-8
x
ao
u163
y
i
http://www.xiaoyu163.com
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TABLE OF CONTENTS
1.
2.
3.
4.
4-1. Block Diagram - MAIN Section - .................................. 15
4-2. Block Diagram - DISPLAY/POWER Section - ............. 16
4-5. Schematic Diagram - DIGITAL Board (1/5) - .............. 19
4-6. Schematic Diagram - DIGITAL Board (2/5) - .............. 20
4-7. Schematic Diagram - DIGITAL Board (3/5) - .............. 21
4-8. Schematic Diagram - DIGITAL Board (4/5) - .............. 22
4-9. Schematic Diagram - DIGITAL Board (5/5) - .............. 23
4-10. Printed Wiring Board - MAIN Board - ......................... 24
4-11. Schematic Diagram - MAIN Board (1/4) - ................... 25
4-12. Schematic Diagram - MAIN Board (2/4) - ................... 26
4-13. Schematic Diagram - MAIN Board (3/4) - ................... 27
4-14. Schematic Diagram - MAIN Board (4/4) - ................... 28
4-17. Printed Wiring Boards
- STANDBY Board, DCDC Board - .............................. 31
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6 7
1 3
1 5
- STANDBY Board, DCDC Board - .............................. 32
4-23. Printed Wiring Board - HDMI SW Board - .................. 37
4-24. Schematic Diagram - HDMI SW Board - ..................... 38
5.
5-1. Front Panel Section ......................................................... 47
5-2. Chassis Section ................................................................ 48
6.
co
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STR-K990
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