Is this Kenwood KA9100 with one channel not working worth fixing?

[jervz]

KA9100 went for previously serviced as it has a blown output stage and stuck in protective mode. Silver face and wood in excellent condition.

Full rebuild with new output module (TA100W) and a full recap with Nichicon UFG and Kemet film capacitor was done 7 months ago. Details below are done in the unit.

It was working for several month but one channel failed this time and being sold at US$300. Assuming there is no more warranty for this unit, is this unit still worth buying at US$300 at this state and still repairable given a potential issue on TA100W?

Service details done previously and cost at US$570 (parts and labor):
-cleaning controls and switches
-cleaning protection relay internal contacts
-all electrolytic capacitors replaced with Nichicon UFG and Kemet film
-increased power supply to 18,000ufx4
-replaced driver board transistors with KSA992 and KSC1845
-replacement output module installed (TA100W)
-set DC offset to 0v on both channels
-calibrated VU meter levels

 

[Blue Shadow]

I think I have read about a replacement power module made of regular stuff. Don't know if they were on the bay but if you can get one or two for matched unit, sure the 9100 is a fine amp. Can't talk value except in the $&¢ forum. A mod might see your question and move the thread.

 

[kwayde]

Without a detailed explanation of the latest failure, the problem could be something as simple as the relay contacts being bad. That relay should have been replaced, not cleaned for the amount paid for servicing.