Perhaps a defective IC201 (TDA8377A, Samsung part# 1204-00427). Bob Waterman, CET® #RI-28 Master Technician License #9109 Service Manager / Parts Manager Gemini Computer, TV, & Security Alarms (508)695-7302 (508)695-7769 FAX geminitv@xxxxxxxxxxx geminitv@xxxxxxx www.geminicomputertvsecurityalarms.com ----- Original Message ----- From: "Don Hartigan" <hartstv@xxxxxxxxxxx> To: <techassist@xxxxxxxxxxxxx> Sent: Wednesday, March 17, 2004 8:51 AM Subject: [TechAssist] Fw: Re: Samsung,TV,mod#TXE2545,chass#KCT52A,No vert FIX,Now no sound or Pix > UPDATE; This unit has me stumped.Still no tuner video after replacing the > EEPROM & IC701,& new tuner.I have tuner video on pin 5 of IC701 but no > signal on it's o/p pin 14.This is the A/V switching IC.If I jumper pin 5 i/p > to pin 14 o/p I still don't get tuner video UNLESS I unsolder pin 15 of > IC701.Pin 15 goes to Q701 collector;it's base is connected to pin 3 of the > micro IC901.Checked Q701,it's good.Would my micro be causing my problem?My > A/V i/p's are good,What have I missed?.........TIA......... > Don of HARTS-TVCR''ASC'' > 9 Robert St,Oromocto,NB,Can,E2V3N2 > hartstv@xxxxxxxxxxx > Tel-5063579785,fax-3576010 > cel-4701719 > ----- Original Message ----- > From: "Don Hartigan" <hartstv@xxxxxxxxxxx> > To: <techassist@xxxxxxxxxxxxx> > Sent: Wednesday, March 10, 2004 1:48 PM > Subject: Re: [TechAssist] Re: Samsung,TV,mod#TXE2545,chass#KCT52A,No vert > FIX,Now no sound or Pix > > > > Tks for your reply Bob,however when I scope pin 5 of IC701=AV switching IC > > there is good video.This is the TV i/p pin.On pin 14,the o/p I have no > > signal.If I lift pin 14 & jumper my i/p to the trace where I lifted pin 14 > > my video appears on the tv.That's why I'm assuming this IC is bad or does > > the EEPROM enable this IC to allow the video signal to pass through? > > Don of HARTS-TVCR''ASC'' > > 9 Robert St,Oromocto,NB,Can,E2V3N2 > > hartstv@xxxxxxxxxxx > > Tel-5063579785,fax-3576010 > > cel-4701719 > > ----- Original Message ----- > > From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxxxxxxx> > > To: <techassist@xxxxxxxxxxxxx> > > Sent: Wednesday, March 10, 2004 10:18 AM > > Subject: [TechAssist] Re: Samsung,TV,mod#TXE2545,chass#KCT52A,No vert > > FIX,Now no sound or Pix > > > > > > > That sounds like you may very well have a bad EEPROM which is a very > > common > > > failure on these. I suggest you order and try one. > > > > > > Bob Waterman, CET® #RI-28 > > > Master Technician License #9109 > > > Service Manager / Parts Manager > > > Gemini Computer, TV, & Security Alarms > > > (508)695-7302 > > > (508)695-7769 FAX > > > geminitv@xxxxxxxxxxxxxxxx > > > geminitv@xxxxxxx > > > www.geminicomputertvsecurityalarms.com > > > > > > > > > ----- Original Message ----- > > > From: "Don Hartigan" <hartstv@xxxxxxxxxxx> > > > To: <techassist@xxxxxxxxxxxxx> > > > Sent: Tuesday, March 09, 2004 6:26 PM > > > Subject: [TechAssist] Samsung,TV,mod#TXE2545,chass#KCT52A,No vert > FIX,Now > > no > > > sound or Pix > > > > > > > > > > Unit had no vert. sweep;Replaced TDA8350=IC301.Now have no sound or > > > pix.A/V > > > > i/p's are good.All volts to tuner are good,ie 5,12 & 30 vdc.Replaced > > > > tuner,no help.Think it may be the A/V switching IC701=M51321,not > > switching > > > > into the tuner mode.Have searched all my sources for a data sheet so I > > can > > > > scope this IC & had no luck.Can someone send me a pdf or pin out for > > this > > > > IC.Has anyone got any other ideas for this problem.The reason I think > > the > > > > switching IC 701 is latched up is when I select tuner & i/p video on > the > > > > video i/p jack I get my pix,but of course it shows the video I have > > > > inputted.........TIA........... > > > > Don of HARTS-TVCR''ASC'' > > > > 9 Robert St,Oromocto,NB,Can,E2V3N2 > > > > hartstv@xxxxxxxxxxx > > > > Tel-5063579785,fax-3576010 > > > > cel-4701719 > > > > > > > > > > > > > > > > > > > -------------------------------------------------------------------------- > > > --- > > > > Lost Password: > > > > http://www.tech-assist.org and select "Login Problems?". > > > > Email Archives: > > > > //www.freelists.org/archives/techassist/ > > > > > > > > > > > > > > -------------------------------------------------------------------------- > > --- > > > Lost Password: > > > http://www.tech-assist.org and select "Login Problems?". > > > Email Archives: > > > //www.freelists.org/archives/techassist/ > > > > > > > > > -------------------------------------------------------------------------- --- > Lost Password: > http://www.tech-assist.org and select "Login Problems?". > Email Archives: > //www.freelists.org/archives/techassist/ > ----------------------------------------------------------------------------- Lost Password: http://www.tech-assist.org and select "Login Problems?". Email Archives: //www.freelists.org/archives/techassist/