yea what doug said, if it blows when first plugged in, and transformers open,,, one of those big diodes opened with the surge that opened the transformer, I've got both in stock if you need, new or used, ? Brock Electronics R.R.4 box 237 5208 cr.3385 Independence Ks. 67301 620-331-0235 fax 331-7191 markbrock@xxxxxxxxxxxxx Zenith*Philips*Peavey*Fender*Crate we work on all brands,makes,models of anything that plugs in the wall ----- Original Message ----- From: "Doug Keller" <dek@xxxxxxxxxxxxxx> To: <techassist@xxxxxxxxxxxxx> Sent: Tuesday, December 28, 2004 12:56 PM Subject: [TechAssist] Re: Peavey Mixer / Amp. Model XR684. Blows main fuse F8A (info on "open"xfmr). > rectifier bridge? > > Doug Keller > Wis-Kel Electronics > 101 Freeland Ave. > Terra Alta, WV > USA 26764 > dek@xxxxxxxxxxxxxx > dek@xxxxxxxxxxxxxxx > http://www.tech-assist.org > "Learn from the mistakes of others, because you > won't live long enough to make them all yourself" > > > > > > Robinson Electronics wrote: > > > > >Checking this amp out for a customer of mine, request help? > >I am working without schematics on this model! > >Problem: Repeatedly blows fuse F8A > > > >Diagnose: Checked all power amp transistors, caps, resistors for shorts or leakage. > >Checked for bad or cracked connections on board. > >When checking power transformer (number on xfmr "70538719"), on connection plug J123, J153 found no resistance (open) at all between the 2 connectors. > >Seems to indicate a bad, or "open" tranxformer. > > > >Can you help with some information on this? > >You can reach us anytime by email, or phone at the numbers below. > > > >Robinson Electronics > >1075 Sweeten Creek Road > >Asheville, NC 28803 > >Ph./Fax. 828 274-3787 > >Toll Free. 1-888 ROBELECT > >www.robinsonelectronics.com > >www.robelect.com > >Mailto: RobinsonElectronics@xxxxxxxxxxx > > > > > >--------------------------------------------------------------------------- -- > >Lost Password: > >http://www.tech-assist.org and select "Login Problems?". > >Email Archives: > >http://www.freelists.org/archives/techassist/ > > > > > > > > > > > > -------------------------------------------------------------------------- --- > Lost Password: > http://www.tech-assist.org and select "Login Problems?". > Email Archives: > http://www.freelists.org/archives/techassist/ ----------------------------------------------------------------------------- Lost Password: http://www.tech-assist.org and select "Login Problems?". Email Archives: http://www.freelists.org/archives/techassist/