[TechAssist] Re: Fw: Re: Samsung,TV,mod#TXE2545,chass#KCT52A,No vert FIX,Now no sound or Pix

  • From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Wed, 17 Mar 2004 10:05:31 -0500

Not sure but it is known to cause a "no video" symptom. You indicated the
parts you have already replaced so it must be something else. That is why I
indicated "perhaps".

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 9:50 AM
Subject: [TechAssist] Re: Fw: Re: Samsung,TV,mod#TXE2545,chass#KCT52A,No
vert FIX,Now no sound or Pix


> Bob,pls correct me if I'm wrong,but if IC201 is bad how come I have tuner
> video on the  i/p of IC701 pin 5..?
> 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@xxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Wednesday, March 17, 2004 10:19 AM
> Subject: [TechAssist] Re: Fw: Re: Samsung,TV,mod#TXE2545,chass#KCT52A,No
> vert FIX,Now no sound or Pix
>
>
> > 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
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
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