[TechAssist] Re: Philips Magnavox TS2746C221, 27F800 7583 horiz. instability (jagged pic.) "Shhh" in audio, shuts down
- From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 11 May 2004 13:42:13 -0400
Check the waveform and the horizontal drive transistor (7461). I have had a
few with similar symptoms and found that transistor to be the cause.
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: "Phil Bader" <tjanphyl@xxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, May 11, 2004 1:34 PM
Subject: [TechAssist] Philips Magnavox TS2746C221, 27F800 7583 horiz.
instability (jagged pic.) "Shhh" in audio, shuts down
> Sorry for long subject line,but that's it.
> Customer complaint was "shuts off after it warms up".
> Went over the underside, found no bad solder, rapped and tapped while
> on, no change.
> It has a full picture with a horizontal jagged "piecrusting" around all
> images, along with a "Shhhhh" noise in with the audio, like an audio IF
> misalignment. I think I see a very slight overall intermittant size and
> brightness fluctuation, and after ten minutes or so it just shuts off.
> Cannot turn back on unless cord unplugged for a moment.
> I changed the known issue, scan cap #2463 (680pF@ 2KV) with no help. I
> freeze sprayed around but nothing definate.
> Vert IC has good solder (this isn't vertical symptom anyway)
> Need input here guys!
> Phil Bader
>
> --
>
> Philip Bader
> Jan Phyl TV Inc. (estab. 1976)
> 3420 Recker Hwy. Winter Haven, Fl. 33880
> Fax (863) 299-8821
> email: tjanphyl@xxxxxxxxxxxxxxx
>
>
>
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