[TechAssist] Re: Panasonic CT-32HX40B, Chassis DX2/AP346 Int High Voltage, Video Problem
- From: Jeff Dougherty <support@xxxxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sun, 31 Aug 2003 10:35:40 -0400
Art,
>From Tech Repair CD:
PAN\CT32HX40B\Turn the TV ON - only blue raster with retrace lines and then TV
shuts OFF.\\\\Located failure with the blue video driver\ one of the three IC?c
on the picture tube CRT - generic # TDA 6111Q. The part was ordered and
replaced\and the customer placed a call again after 5 days. The same IC was
blown again - there was a physical damage on the body of the IC.\1. Do not
replace the IC if such a problem is located.\2. Order part # TXANV20BSER - this
is a kit\ containing 1 IC and some othe\3. Order additional 2 PCS IC?s TDA
6111Q\ and replace all 3 of them.\4. This service bulletin is no
--
Jeff
Intrepid Video TV/VCR Repair
263 S Front St
Steelton PA 17113
Fax: 717 564 495 2
www.intrepid-video.com www.tech-repair.net
On Sat, 30 Aug 2003 22:02:00 -0400, art bevilacqua,
abevilac@xxxxxxxxxxxxx wrote:
Initially, the screen would intermittently go completely green. While
troubleshooting, we noticed that sometimes the high voltage would not =
come
up (when the set is powered on, there are a number of relays that click, =
and
finally high voltage (and Flyback secondary voltages) come up. Thinking =
that
the video problem, which involves an update kit and causes shutdown, =
might
be causing the loss of high voltage, we ignored it for the moment.
We ordered and installed the fix for the video drive chips being =
damaged,
but now the high voltage never comes up (unless I'm measuring for =
voltage in
the horiz supply area and then sometimes it will fire up when I touch a
certain test point). Once this happens, it will come on a few times and =
then
die again. Pulling the CRT socket doesn't help.
When the set does come on, we have a picture for about a minute, then =
the
picture fades to a dull grey screen with retrace lines. It never did =
this
before, so I plan to swap out the new video drivers one at a time, but =
does
anyone have any knowledge about the intermittent horiz output?
Thanks, art
Art Bevilacqua
Essex Radio and TV
40 Main Street
Essex, MA 01929
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