Remember to check for bad or spliced speaker wires.hth Country TV Ron Miller Inez, TX. 77968 ----- Original Message ----- From: "LeRoy Westlund" <llw@xxxxxxxxxx> To: <techassist@xxxxxxxxxxxxx> Sent: Thursday, March 03, 2005 1:04 PM Subject: [TechAssist] Re: Optimus STAV-3170 Stereo receiver - Blowsoutputs on one side only. >I kinda suspected that,...but,... > He claims, and insists, his speakers are working OK on another unit. > I was surprized that it went out as soon as he hooked it up, cause it was > working, and running cool in my shop. Maybe I better take it back, and ohm > out his speakers before I hook it up this time. > > Regards, > LLW > > LeRoy Westlund > Westlund TV & Electronics > 97 North Main " I forgot,..to remember,.. > Centerfield, UT 84622-0087 to forget " > Ph./Fax 435-528-3822 > mailto:LLW@xxxxxxxxxx > > -----Original Message----- > From: Christopher Barnak <cbarnak@xxxxxxxxxxxxx> > To: techassist@xxxxxxxxxxxxx <techassist@xxxxxxxxxxxxx> > Date: Thursday, March 03, 2005 11:38 AM > Subject: [TechAssist] Re: Optimus STAV-3170 Stereo receiver - Blowsoutputs > on one side only. > > >>Beware, I had the same problem, and it turned out the customer >>had a bad speaker. Sounded good. But at a lower volume than the >>other. Turned out it had some shorted windings. >> >> >> >>Christopher Barnak, CET >>Norfolk Public Schools >>Electronics Maintenace >>966 Bellmore Ave. >>Norfolk, Va. 23504 >> >>Phone 757 628 3385 >>Fax 757 628 3392 >>cbarnak@xxxxxxxxxxxxx >> >> >>>>> llw@xxxxxxxxxx 3/3/2005 11:55:53 AM >>> >>Hi members, >>I had repaired this unit by replacing the following parts, but it is >>back >>with the same problem: >>Q2 blown apart (2SC3281) >>Q4 shorted (2SA1302) >>Q512 open (2SC3298) >>R612 open (4.7 ohms) >>R614 open (4.7 ohms) >>D520 shorted (I used a 1N914) >>D522 shorted (I used a 1N914) >> >>I am wondering if there is a better replacement for D520, and D522, >>since >>the 1N914 is a bit longer, and not physically the same size. I can't >>read >>the number off the originals, cause they are too small. >> >>The only difference between this repeat failure of the outputs, and >>the >>first repair is that this time Q512 (the black 2SC3298) is bad. Last >>time >>Q514 (the green 2SA1306) was bad. I had replaced Q514 with a good >>generic, >>but the replacement was black in color, not green like the original. >>Also, this time it is D520, and D522 that is bad, not D524 and D526 >>(which >>seem to be the same size diode). I am wondering if this might have >>thrown >>the outputs out of balance, and caused the repeat failure of the >>outputs. >> >>Any help is appreciated, >>LLW >> >>LeRoy Westlund >>Westlund TV & Electronics >>97 North Main " I forgot,..to remember,.. >>Centerfield, UT 84622-0087 to forget " >>Ph./Fax 435-528-3822 >>mailto:LLW@xxxxxxxxxx >> >> >> >>--------------------------------------------------------------------------- > -- >>This Email List is viewable to the Public. >>Lost Password: >>http://www.tech-assist.org and select "Login Problems?". >>Email Archives: >>//www.freelists.org/archives/techassist/ >>--------------------------------------------------------------------------- > -- >>This Email List is viewable to the Public. >>Lost Password: >>http://www.tech-assist.org and select "Login Problems?". >>Email Archives: >>//www.freelists.org/archives/techassist/ >> > > ----------------------------------------------------------------------------- > This Email List is viewable to the Public. > Lost Password: > http://www.tech-assist.org and select "Login Problems?". > Email Archives: > //www.freelists.org/archives/techassist/ > ----------------------------------------------------------------------------- This Email List is viewable to the Public. Lost Password: http://www.tech-assist.org and select "Login Problems?". Email Archives: //www.freelists.org/archives/techassist/