check shorted rectifier diode in main power supply,check shorted power transistors,if it is power IC amplifier unsold it put fuse if doesn't blown up the problem is solve. more...
Hi, The most common cause of this is blown output transistors, assuming this is not a valve amp. At any rate, this is something you will want to have looked at by a tech. more...
550 lost one channel, dra 550 lost one channel,
fuse was blown but when i replace it the channel is simply 60 hz.
output " transistors " adjacent the fuse on the heat pipe are tr 515 a1104 and and tr 517 o2879
please sell them to me more...
the output amplifier section. This happens because a problme is detected in the output section. This unit will require service. Most likely the output transistors have failed. Figure on $20-$40 for parts plus the local labor rate for repair cost. Dan more...
what brand is your amp, model. you have a defective power output transistors... you have to get it repaired by yamaha if they will still accept the model. they might tell you parts no loneger available. but more...
to as protect mode. There is a problem with the final stage of the amplifier. The most common parts that fail are the output transistors. Figure on $15-$40 in parts plus the local labor rate for the total repair cost. Dan more...