[TechAssist] Re: Zenith PTV model A50M91W5
- From: "Intrepid Video Support" <support@xxxxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sun, 9 Jan 2005 11:59:16 -0500
Ernie,
Take the mirror to a glass place and have them install an acrylic mirror
in the frame.
Should be around $50.00 and look lots better.
Jeff
--
Intrepid Video TV/VCR Repair
263 S Front St, Steelton PA 17113
717-939-7708; (F) 717-564-4952
----- Original Message -----
From: "Ernie - Valley TV & Stereo" <valleytv@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Saturday, January 08, 2005 12:28 PM
Subject: [TechAssist] Zenith PTV model A50M91W5
Hi gang:
Had an interesting problem with this set.
Set came in dead - replaced 9-1978-01R module and restored operation.
but had a convergence problem on right side of raster.
convergence on right, especially red horiz.lines are curved downward on
lower
part of screen and upward on top half, blue & green are affected as well.
Replaced both convergence IC's (STK392-110) - NO HELP.
No convergence adjustments would affect only the right horiz. lines.
Checked components on convergence board, but found no problems.
A few days later I checked the mirror and found the problem.
This set uses a mylar mirror stretched over a, (I presume plastic) frame.
The mylar film had an area about 6 inches in diameter that was deformed
caused by the frame which was bulged and raised and distorted the mirror
How this happened is a mystery to me - no excessive heat nearby.
Now I have to convince the customer that he had this problem before
and live with it or replace the mirror for another $200.00.
Ernie Niessen
Valley TV & Stereo
9401 Fletcher St.
Chilliwack, B.C.
V2P 4Z4
Canada
Since 1960
valleytv@xxxxxxxxxxxx
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