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Old 11th March 2005, 10:47 AM   #11
K-amps is offline K-amps  United States
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Why would there now be a need for a heatsink all of a sudden? You dont put heatsinks on components that get overly warm (unless by design), you trace the source of the problem and fix it...
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Old 12th March 2005, 07:51 AM   #12
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Quote:
Originally posted by K-amps
Why would there now be a need for a heatsink all of a sudden? You dont put heatsinks on components that get overly warm (unless by design), you trace the source of the problem and fix it...
If the transistor is used as an amplifier then it will need a heat sink to absorb the heat it produces. But if not, then, I think there's a short circuit or simply your transistor cannot handle such current. Look for other transistor with higher power/ current capacity.

If you have a copy of the schematic, pls post it so that we can take a look and help identify the problem.
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Old 12th March 2005, 07:51 AM   #13
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Quote:
Originally posted by K-amps
Why would there now be a need for a heatsink all of a sudden? You dont put heatsinks on components that get overly warm (unless by design), you trace the source of the problem and fix it...
If the transistor is used as an amplifier then it will need a heat sink to absorb the heat it produces. But if not, then, I think there's a short circuit or simply your transistor cannot handle such current. Look for other transistor with higher power/ current capacity.

If you have a copy of the schematic, pls post it so that we can take a look and help identify the problem.
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Old 12th March 2005, 12:57 PM   #14
K-amps is offline K-amps  United States
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Quote:
Originally posted by buloi123


If the transistor is used as an amplifier then it will need a heat sink to absorb the heat it produces. But if not, then, I think there's a short circuit or simply your transistor cannot handle such current. Look for other transistor with higher power/ current capacity.

If you have a copy of the schematic, pls post it so that we can take a look and help identify the problem.

You missed the point....
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Old 12th March 2005, 01:37 PM   #15
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well im still looking for a schematic or service manual for a avr-4550, cant seem to find one can anyone help?
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Old 24th October 2005, 03:37 PM   #16
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ok heres a scematic of the channel in question,

also any ideas which one is the driver?

also what else to check as the power transistor is getting red hot after 5 mins.
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File Type: jpg sce.jpg (52.0 KB, 42 views)
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