i got a used hk3270rds, 230v version. was dead, repaired flex cable, and placed missing grounding screws, amplifier started.
When pressing power ON key that puts amplifier in standby, the relay sparks and smokes. the relay doesn't activate until second power key (momentary switch) is pressed. amplifier works almost fine except that right channel is 15-20% lower than left channel. With speakers ON, as I pressed power key, volume slightly open, the right channel speaker got boom/static/pop etc.
What is the most likely cause of this?
is the relay activating on power ON (standby) key when it is not supposed to? sounds like it in the video.
When I press the momentary power on key multiple times, which controls the relay, sometimes it sparks sometimes it doesn't. I tried separating amp and tuner boards, the spark intensity is reduced, but not gone.
Service manual attached, relay smoke video in zip file attached.
When pressing power ON key that puts amplifier in standby, the relay sparks and smokes. the relay doesn't activate until second power key (momentary switch) is pressed. amplifier works almost fine except that right channel is 15-20% lower than left channel. With speakers ON, as I pressed power key, volume slightly open, the right channel speaker got boom/static/pop etc.
What is the most likely cause of this?
is the relay activating on power ON (standby) key when it is not supposed to? sounds like it in the video.
When I press the momentary power on key multiple times, which controls the relay, sometimes it sparks sometimes it doesn't. I tried separating amp and tuner boards, the spark intensity is reduced, but not gone.
Service manual attached, relay smoke video in zip file attached.
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on the lower volume of right speaker , I found its due to flimsy pcb connectors, i would like to replace these with some new copper pin connectors.
what? wasnt the relay video exciting enough? took out the relay, burned from outer underside. looked like maybe because of glue, scraped all the glue, cleaned the relay contacts, but no success. only thing I can think of is replacing the adjacent ceramic capacitor.