Read Sony HT-K25 / TA-VE25 Service Manual online
2
TA-VE25
1. GENERAL
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2. TEST MODE
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3. DIAGRAMS
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3-1. Printed Wiring Board – Main Section – ·························· 8
3-2. Schematic Diagram – Main Section – ···························· 9
3-3. Printed Wiring Board – Control Section – ···················· 10
3-4. Schematic Diagram – Control Section – ······················· 11
3-5. Printed Wiring Board – Display Section – ···················· 12
3-6. Schematic Diagram – Display Section – ······················ 13
3-7. IC Pin Function Description ········································· 14
3-8. IC Block Diagrams ······················································· 15
3-2. Schematic Diagram – Main Section – ···························· 9
3-3. Printed Wiring Board – Control Section – ···················· 10
3-4. Schematic Diagram – Control Section – ······················· 11
3-5. Printed Wiring Board – Display Section – ···················· 12
3-6. Schematic Diagram – Display Section – ······················ 13
3-7. IC Pin Function Description ········································· 14
3-8. IC Block Diagrams ······················································· 15
4. EXPLODED VIEWS
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5. ELECTRICAL PARTS LIST
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[When bringing in the equipment for service]
When bringing the system in for repairs, be sure to bring in the
entire system (control center (TA-VE25) and subwoofer (SA-
WMS25) This product is system product, and the entire system is
needed to determine the location requiring repair.
entire system (control center (TA-VE25) and subwoofer (SA-
WMS25) This product is system product, and the entire system is
needed to determine the location requiring repair.
: LEAD FREE MARK
Unleaded solder has the following characteristics.
• Unleaded solder melts at a temperature about 40
• 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
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!
heated tip is applied for too long, so be careful!
• Strong viscosity
Unleaded solder is more viscous (sticky, less prone to flow) than
ordinary solder so use caution not to let solder bridges occur such
as on IC pins, etc.
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.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of soldering iron around 270˚C
during repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
TABLE OF CONTENTS
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