This amp had two bad channels and a blown power supply.After replacing all bad parts,amp powers up and plays good audio.Problem is if i try to power the amp up back to back it will start drawing excessive current upon the second power up.I notice if i discharge the primary caps before each power up it does not draw excessive current ,
Also if i power it up with remoter and B+ at the same it draws excessive current
Any suggestions?
Also if i power it up with remoter and B+ at the same it draws excessive current
Any suggestions?
Attachments
Connect only remote and ground and check the gate signal for each power supply FET with the probe on the leg of the FET (not on the board).
I can't guarantee that the N-version is the problem but they have caused problems in other amps.
The cut windings are likely factory. Is there any place for them to go into the board?
The cut windings are likely factory. Is there any place for them to go into the board?
I didn't see any empty place on the board.
What about if i pull the rectifiers,that could narrow things down?
What about if i pull the rectifiers,that could narrow things down?
I don't know if it will tell you anything but soldering a bridge between the base and emitter of Q10 (confirm that base is connected to pin 1 of the LM339) should prevent the output stage from being biased on.
For my reference 500x
For my reference 500x
If the base-emitter jumper doesn't work to disable the output stage, solder a wire across the terminals of C18 instead.
- Status
- Not open for further replies.