need help working on a dead amp

Chris8sirhC · 19th September 2005, 01:23 AM

Ive got 2 Tsumani HQ2002S amps sitting in my room right now. Neither of them work.
On the first one, It powers on, the fans turn on, the error light comes on, and nothing comes out of the output terminals.

On the second one, It powers on, the fans turn on, the error light does not come on, and nothing comes out of the terminals.

Does anybody have a good guess as to what is wrong with these amps. I know its impossible to know without actually going through them yourself with testing equipment, but if you had 10 guesses as to what was wrong, what would they be?
thanks,
Chris

ocaukrell · 20th September 2005, 03:17 AM

would be checking voltage from power supply to amp section.
output trasistors for dead ones.
anything obvious like burn marks or discoloration from heat.
if theres no voltage from the supply, remove the rectifier diodes and test again, this should give you an idea if the fault is in the power or amp section.

19th September 2005, 01:23 AM	#1
Chris8sirhC diyAudio Member Join Date: Jan 2004 Location: Greenville SC	need help working on a dead amp Ive got 2 Tsumani HQ2002S amps sitting in my room right now. Neither of them work. On the first one, It powers on, the fans turn on, the error light comes on, and nothing comes out of the output terminals. On the second one, It powers on, the fans turn on, the error light does not come on, and nothing comes out of the terminals. Does anybody have a good guess as to what is wrong with these amps. I know its impossible to know without actually going through them yourself with testing equipment, but if you had 10 guesses as to what was wrong, what would they be? thanks, Chris

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20th September 2005, 03:17 AM	#2
ocaukrell diyAudio Member Join Date: Aug 2005	would be checking voltage from power supply to amp section. output trasistors for dead ones. anything obvious like burn marks or discoloration from heat. if theres no voltage from the supply, remove the rectifier diodes and test again, this should give you an idea if the fault is in the power or amp section.

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