Discussion in 'Exclusively Sansui' started by skippy124, Jun 22, 2015.
No, unfortunately no.
Yah....simply gorgeous !
What an audiophile can do with that.....hook that puppy up !
The elusive continues to hide from us.
Quite low capacitance
Any chance of obtaining a copy of 907 ltd manual as mine has one channel running far hotter than the other? Will be in Sydney next week and would like to meet up with your father as I missed him last year.
Sorry, I don't have that manual.
czubsi is the member you should look for asking help on the AU-x907Ltd. Don't ask for manual, just guidance. The manual is rare.
I have the AU-α907 Limited owners manual (in Japanese of course). I could scan and post if that would be helpful to anyone.
All welcome! Please help the service manual for this amplifier Sansui AU-a907i Limited ( czubsi, craggd)
craggd - AU-α907 Limited owners manual throw him then
I have posted the AU-α907 Limited owners manual (in Japanese) on Digital Docs.
hello friends, just a small update about my 907 MOS limited, as i mentioned in my initial post I have cracking noise from one of the channels and fortunately I figured out the problem. I soldered small piece of wire between speaker output relay contacts and noise is gone. Actually this is quite dangerous as I bypassed the protection board. During 2 months testing period with bypass across the relay i realized that noise problem fully gone, and yesterday I removed the bypass and noise returned back. So looks like i need to clean the relay contacts. Any thought about this? may be i missed something and need to check something else in parallel as i'm going to open the protection board.
hope my experience will help
regarding the bias current - its still around 25-27mV and output transistors temperature is about 45-47C which is high but tolerable
You may get a very temporary improvement by cleaning the relay contacts, but my experience with speaker relays is that once they behave as you describe, the proper action is to replace it/them.
Replace the relays, cleaning the contacts is a complete waste of time.
Just slip a new relay in and you'll be good for another 30 years...
Yes. Replacing the relay is the way to go.
I would consider putting some fresh thermal paste on those outputs too. BUT ... that's just my habit of overkill.
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