[TechAssist] Re: RCA Model# P52960(YX1), chassis# PTK195Y06B, intermittent horizontal pincushion
- From: "Mouton's Electronics" <moutons@xxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 13 Dec 2002 09:55:30 -0600
Hi Bob,
Check the collector of Q14802 for 14-17vdc, if missing while no pincusion
change: CR14403(227291) CR14800(243636) C14402 (239109) C14800(230982). Any
one of these can cause intermittant pincusion, on of the caps may even be
swollen. This circuit is much like the ctc169 pin damper circuit. I have
also found loose connections on these compontents when it is intermittant so
you will have to take it appart and look underneath. Most of the time it has
been a loose connection, tapping doesn't always show the problem due to the
riggidness of these components and some have glue on them.
Hope this helps
Jason Mouton
Mouton's Electronics
1116 Center St.
New Iberia, LA 70560
337-364-1641 Phone/Fax
moutons@xxxxxxxxxxxxxxxx
----- Original Message -----
From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxxxxxxx>
To: "Techassist" <techassist@xxxxxxxxxxxxx>
Sent: Friday, December 13, 2002 7:22 AM
Subject: [TechAssist] RCA Model# P52960(YX1), chassis# PTK195Y06B,
intermittent horizontal pincushion
> Folks,
>
> I currently have an RCA Model# P52960(YX1), chassis# PTK195Y06B, with very
intermittent horizontal pincushion. I have gone to the customer's home twice
and never saw the problem so I ended up bringing it in to the shop. It ran
around the clock for almost 24 hours before exhibiting this symptom. I have
resoldered a multitude of connections on various boards. The symptom does
not appear to be vibration or tapping sensitive as it is now displaying the
pincushion problem and I cannot get it to go back to normal (bear in mind I
have not turned the TV off, hoping to keep the symptom present in order to
troubleshoot. I am getting ready to leave for road calls so I have not yet
broken out a scope nor do I cuurently have the time to sit with it. Also
remember this chassis may be difficult to access locations on the board with
it fully assembled. I am almost afraid to turn it off for fear of the
picture returning to normal. I was hoping someone out there had already had
this problem so
> I welcome your input.
>
> Bob Waterman, CET® #RI-28
> Master Technician License #9109
> Service Manager
> Gemini Computer, TV, & Security Alarms
> (508)695-7302
> (508)695-7769 FAX
> geminitv@xxxxxxxxxxxxxxxx
> geminitv@xxxxxxx
>
>
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