Re: Technics SU-v505 amp problem/discussion
The IC AN7062 outputs to the base of PNP transistors Q71, Q72. It might be helpful to replace these, taking a device with somewhat higher power rating: 2SA1124, 2SA1145, 2SA1285, 2SA1208 will all do the job. And a timely warning: be careful when adjusting the bias current, the output stage of the power amp tends to oszillate!
Good luck for your repair!
Raymond.G
New Member
Last Activity: 08-06-2018, 03:38 PM
Joined: 07-20-2018
Location: Ennetbaden
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Re: Technics su-z960 burnt fuse
Queer enough, I just encountered the same problem. I was quite astonished to find the problem in a shorted foil condenser (C702 in the schematic). There are alternative values, mine was a 220nF, 100V type - not enough for the AC peak value of 120V across the condenser. Another source of failure might be the hybrid power amp (IC501, SVI3105B).
Good luck on your repair!Leave a comment:
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Re: New Members - please post your introductions here
Hello All,
A retired electrical engineer from Switzerland, now eagerly repairing Hi-Fi equipment and loudspeakers. Hoping to give some useful advice - as well as getting usefull tips.
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