I recently acquired an AU-9500. So I look in the service manual to adjust the offset and bias. I set the offset ok everything responds as it should. I then follow the instructions and remove the speaker fuse and hook my multimeter in series where the fuse was as it says to do. I fire it up and it says to adjust to 30-40ma. Well its at 10-11ma and turning the pot to adjust it does nothing. It does not change the current whatsoever. Both channels respond exactly the same way. What the F? I cleaned the trimmer and checked it with a meter and it does indeed change resistance when you turn it. So why doesn't the bias change? I have attached the instructions and a pic of my meter clipped in. What else could be wrong that would stop the bias from changing? It even says I do not need any load connected but I tried it with a load and didn't matter.
Attachments
Yes it is and no I havent. It plays great and everything works so I didn't mess with it any more.
Do you happen to have pictures of it to share? How long have you had it? Have you been using it personally?
I have used it like 4 or 5 days while I work. I got it from the original owner. I did some work on a tube amp he had and saw this sitting in a corner of his house and wound up taking it home. I was going to refurb it but it really doesn't appear to need it so I just played it a few days while I worked on the computer and thats all I have done with it. I did test everything. It all works. I didn't test all the tape dubbing etc but I assume its fine. Sounds great
I'll take $650 for it. Plus shipping which you will have to facilitate. I don't have a box for it but I will help as much as I can chasing one down.
Thank you for the brief history of the unit. The price is fair. I'm in Oceanside, CA 92056. I think I saw you are in Corvallis, OR right. I will to figure out about the shipping.
It weighs like 65 pounds or so. Look it up. Its heavy. I will go pick up a box if we can find one local to me. I'll do what I can to help.
let me know your city and zip. Might need to double box it to ship safely with some bubble wrap for extra protection.
Double boxing is the minimum requirement for such a heavy item, plus lots and lots of cushioning in between the boxes
on all six sides, plus extra at the corners. Don't omit the extra cushioning at the corners.
on all six sides, plus extra at the corners. Don't omit the extra cushioning at the corners.
How do you want to do this? I won't charge you anymore than actual shipping cost. If you pay for unit then I'll go buy boxes and packing stuff then you can send shipping material reimbursement? I'm flexible here.