[TechAssist] update: RCA P60752EB, PTK169PEC intermittant video:goes black, has sound
- From: Phil Bader <tjanphyl@xxxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Thu, 21 Apr 2005 17:02:55 -0400
I pulled the chunk and benched it.Slid the main board out and
over,studied the bottom under high magnification. I found no cracks
mentioned or bad traces so far. What I did find was at the junction
where the yellow yoke wire solders to the board,( location terminal ID
"E502" ) and R523, a distinct ring crack all around both wire and
resistor . Had to use good light and my nerdy magnifier hood with both
lenses down! Tho I never actually saw a vertical collapse during the
effect, I bet what I saw with the video flashing was the TV
safety-blanking the video as this connection arced. Make sense? Will
let you know.
Phil Bader
Phil Bader wrote:
>Customer said this intermittant problem happens more now:
>Sound stays OK.
>I've seen it: Video intermittantly sort of streaks, then goes, leaving a
>black screen. Not the HV,it stays... this is definately just the
>composite video picture. I'm testing this on the cable tuner input now,
>not sure if it happens on any other inputs (just got here).
>I'm a tech from the 1970's and this looks like the symptom where a
>breakdown switch is dirty and you moved it causing the video to jump
>out, or a video peaking coil is opening. Kind of a static lines to the
>right across the screen then black.Any histories on video loss like this
>on these? (intermittants like these are difficult to nail down)
>Phil Bader
>
>
>
-----------------------------------------------------------------------------
This Email List is Public. Remove: http://www.tech-assist.org/remove.htm
Lost Password: http://www.tech-assist.org and select "Login Problems?".
Appliance Repair List: http://www.tech-assist.org/secure/tip/chatjoin.htm#app
Email Archives: //www.freelists.org/archives/techassist/
Other related posts:
- » [TechAssist] update: RCA P60752EB, PTK169PEC intermittant video:goes black, has sound
