The power supply is OK because the Right channel is clean. The audio into the final is clean on both channels. Tannebaum is no good, I wrote to them asking about cost of shipping the manual to Trinidad and I got no reply after 2 weeks. No way am I going to send them any money. Thanks for the tip anyway I will keep the list informed if I come up with anything. Tony James M. Knoble wrote: >I don't have any specifics on this one but, I would, personaly, look at the >power supply. The "hum" sounds a like grounding problem to me like a bad >capacitor and this "ground noise" is making it through to the final stages of >the amp - since you've already replaced the final. My next step would be to >look in the preamp stages. > >Also, a service manual is available for $17.00 - if you are looking for one - >from A.G. Tannebaum's site at http://www.agtannenbaum.com/ >The page that lists available schems for Fisher is at > http://www.agtannenbaum.com/f_cat.html > >I'll keep looking, though. Good luck. >Chaz >------- > > >>Date sent: Mon, 29 Oct 2001 05:41:08 -0400 >>From: Anthony Rock <tonyrock@xxxxxxxxxxx> >>To: techassist@xxxxxxxxxxxxx >>Subject: [TechAssist] Need Help With Fisher CA-77 audio >> >amp > >>Send reply to: techassist@xxxxxxxxxxxxx >> >> >> >>Hello all, >> >>I have a Fisher CA-77 stereo amplifier that is dead on the left channel. >>When the customer brought it in there was just a hum on the left >>channel. After doing all the usual voltage checks and finding all Ok I >>replaced the audio output IC which is a STK 4151-11. It still does not >>work. The left channel sounded like it was on the brink of going into >>oscilation and it died again. I have no service information at all on >>this amp. I have been tearing my hair out for over a week now. Can >>someone please help. >> >>Thanks >>Tony >>tonyrock@xxxxxxxxxxx >> >> >>Help make your TechAssist online repair tips >>database better! Submit your fixes here: >>http://www.circuitwork.com/techassist/tip/#tips >>To unsubscribe write to: >>techassist-request@xxxxxxxxxxxxx >>with unsubscribe in the subject line. >> >> > > >Help make your TechAssist online repair tips >database better! Submit your fixes here: >http://www.circuitwork.com/techassist/tip/#tips >To unsubscribe write to: >techassist-request@xxxxxxxxxxxxx >with unsubscribe in the subject line. > > >From - Tue Oct 30 03:53:56 2001 >X-UIDL: +>S!!gbB!!+J5!!D&/!! >X-Mozilla-Status: 0009 >X-Mozilla-Status2: 00000000 >>From techassist-bounce@xxxxxxxxxxxxx Mon Oct 29 10:01:15 2001 >Return-Path: <techassist-bounce@xxxxxxxxxxxxx> >Delivered-To: tonyrock@xxxxxxxxxxx >Received: (qmail 193302 invoked from network); 29 Oct 2001 10:01:15 -0000 >Received: from unknown (HELO avenir.dhs.org) (168.215.193.75) > by ns33.tstt.net.tt with SMTP; 29 Oct 2001 10:01:15 -0000 >Received: from avenir.(none) (localhost [1 > Help make your TechAssist online repair tips database better! Submit your fixes here: http://www.circuitwork.com/techassist/tip/#tips To unsubscribe write to: techassist-request@xxxxxxxxxxxxx with unsubscribe in the subject line.