capacitor brands & power transistor trouble on hk amp - Page 2

K-amps · 11th March 2005, 10:47 AM

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...

buloi123 · 12th March 2005, 07:51 AM

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.

buloi123 · 12th March 2005, 07:51 AM

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.

K-amps · 12th March 2005, 12:57 PM

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....

mrlennon · 12th March 2005, 01:37 PM

well im still looking for a schematic or service manual for a avr-4550, cant seem to find one

can anyone help?

mrlennon · 24th October 2005, 03:37 PM

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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11th March 2005, 10:47 AM	#11
K-amps diyAudio Member Join Date: Nov 2003 Location: Indiana	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...

12th March 2005, 01:37 PM	#15
mrlennon diyAudio Member Join Date: Mar 2005 Location: uk	well im still looking for a schematic or service manual for a avr-4550, cant seem to find one can anyone help?