[TechAssist] Re: (UPD)Philips 25TS54 Ch 25B800-7562..no video
- From: "Jeff Dougherty" <jeff@xxxxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 15 Nov 2001 20:27:29 -0500
Hello all.
I really appreciate the info from all of you.
Thanks to Jim Myers and the others I missed that gave me the pin-outs on
this IC. Missing the -13v led me to a lifted solder pad. When replacing D409
the heat from the iron lifted the trace, even using solder wick. I thought I
repaired it, but didn't see the smaller trace leading to it from the -13.5v
line-off the cap.
This was one of those cases where taking a break and starting out fresh
really helped.
Special thanks to those of you who racked your brain to help me out.
Jeff
mailto:Jeff@xxxxxxxxxxxxxxxxxx www.9-11-2001tragedy.com
FAX 1-413-280-0677
Intrepid Video & Electronics
Harrisburg, PA 17111
717-909-8844
www.intrepid-video.com www.tech-repair.net www.thetoolcaddy.com
----- Original Message -----
From: "Jeff Dougherty" <jeff@xxxxxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, November 14, 2001 11:21 PM
Subject: [TechAssist] (UPD)Philips 25TS54 Ch 25B800-7562..no video
>
> Still have problems with this.I called Philips tech support($2 per
minute).
> Can't we get them on Nesda?
> Before I spend another $20, or more..
> After replacing vertical IC(with original number) and D409, D445, C419,
> C419.(R420 and R445 check good out of circuit) I have a pale white screen
> with rainbow colors, audio OK. No OSD, green LED flashes continuously.
> I have about 10vdc on a couple of pins on vertical IC, but no 13.5v
> or -13.5v
> I can't utilize service menu without OSD. Replaced EEPROM..no help,
removed
> EEPROM and I still have same problem
> Before I replaced the vertical IC, I had a very small box of good video
> lower left hand of screen.
> All caps in vertical section test fine and resistors. Of course, this is
one
> of the impatient customers, no matter how many times you say "I'll call
> you"..he keeps calling to check up on it.
> Any more suggestions?
> I do appreciate every thing a lot of you have offered.
>
>
>
> Jeff
> mailto:Jeff@xxxxxxxxxxxxxxxxxx www.9-11-2001tragedy.com
> FAX 1-413-280-0677
> Intrepid Video & Electronics
> Harrisburg, PA 17111
> 717-909-8844
> www.intrepid-video.com www.tech-repair.net www.thetoolcaddy.com
> ----- Original Message -----
> From: "Jeff Dougherty" <jeff@xxxxxxxxxxxxxxxxxx>
> To: "Techsonline" <techassist@xxxxxxxxxxxxx>
> Sent: Wednesday, November 14, 2001 12:05 AM
> Subject: [TechAssist] Philips 25TS54 Ch 25B800-7562..no video
>
>
> >
> > Original problem..set had a small portion of good video, lower left hand
> > corner.
> > Replaced IC500(vert--pins 4-5 low resistance) and D409(looked burned).
> > Now, I have audio, but no video. Screen is kind of bright with 'rainbow'
> > colors through it.
> > C419 was a little high..replaced. Caps near IHVT test OK, and components
> on
> > CRT are fine.
> > Channels change fine..during scene changes, I can see the screen change,
> > usually gets darker.
> > Where can I go from here...?
> > Thanks.
> >
> > Jeff
> > mailto:Jeff@xxxxxxxxxxxxxxxxxx www.9-11-2001tragedy.com
> > FAX 1-413-280-0677
> > Intrepid Video & Electronics
> > Harrisburg, PA 17111
> > 717-909-8844
> > www.intrepid-video.com www.tech-repair.net www.thetoolcaddy.com
> >
> > *****************************************
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