Committed
My smoke got out again
So it's been an incredible week on craigslist. Picked up a Sansui AU-X501 and JBL L100T's in mint condition, minus a refoam needed for the woofs. Also picked up this AU-11000 which was very dirty and only plays on the right channel. I've always wanted one and this one cost me nothing.
Hooked up some test speakers and it played real well out of the right channel. There is some sound out of the left but it is very faint and you have to crank it all the way up to hear. No static or popping.
So I cleaned it up last night, cleaned all the pots and switches and gave it a once over. Found fuse #F604 on the power supply board for driver amp is blown. Also noticed 2 caps that look pretty toasty(in pics below) on what I think is the protector circuit board. DC offset was 2 - 10 mv on the right channel(was floating up and down) and -14mv on the left channel. I don't have a bias reading yet as the manual had me a little confused where to check at. Hoping someone here can direct me to the right contact points.
I'm dying to get this running. I think it will be a good match for the L100T's. Got the woofers for those packed up today and sending them out to Midwest speaker this week. Any advice on where to start on the 11000 is much appreciated. I'd like to get as much done myself as I can. I'm no tech
but I can read a schematic and know how to solder. I had a year of electronics in my first year of college back in 1981.
Or maybe I should just bite the bullet and send it to someone, I guess that depends on what it will take to get it running. If it's simple stuff I can handle it and rather do it myself. This one's for sure a keeper for me so I'd like it in good shape. Recommendations?
Thanks in advance! Scott
The fuse that is blown, screwdriver is pointed to it.
Found these dark burnt looking spots on the back side of the power supply board for driver amp. The burnt spots are at each end of D601 diode, which is near the burnt fuse.
Here's the 2 caps that look bad on the protection board. The other side is burnt brown, wanted to post this side for the markings.
Hooked up some test speakers and it played real well out of the right channel. There is some sound out of the left but it is very faint and you have to crank it all the way up to hear. No static or popping.
So I cleaned it up last night, cleaned all the pots and switches and gave it a once over. Found fuse #F604 on the power supply board for driver amp is blown. Also noticed 2 caps that look pretty toasty(in pics below) on what I think is the protector circuit board. DC offset was 2 - 10 mv on the right channel(was floating up and down) and -14mv on the left channel. I don't have a bias reading yet as the manual had me a little confused where to check at. Hoping someone here can direct me to the right contact points.
I'm dying to get this running. I think it will be a good match for the L100T's. Got the woofers for those packed up today and sending them out to Midwest speaker this week. Any advice on where to start on the 11000 is much appreciated. I'd like to get as much done myself as I can. I'm no tech
but I can read a schematic and know how to solder. I had a year of electronics in my first year of college back in 1981.
Or maybe I should just bite the bullet and send it to someone, I guess that depends on what it will take to get it running. If it's simple stuff I can handle it and rather do it myself. This one's for sure a keeper for me so I'd like it in good shape. Recommendations?
Thanks in advance! Scott
The fuse that is blown, screwdriver is pointed to it.
Found these dark burnt looking spots on the back side of the power supply board for driver amp. The burnt spots are at each end of D601 diode, which is near the burnt fuse.
Here's the 2 caps that look bad on the protection board. The other side is burnt brown, wanted to post this side for the markings.