[TechAssist] Re: GE M# 46GW950 CH# CTC169HN - Picture pulses on / off
- From: peggs <peggs@xxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx, <techassist@xxxxxxxxxxxxx>
- Date: Mon, 09 Feb 2004 12:10:12 -0800
cr4118
Peggs
At 05:17 AM 2/8/04, myers_tv@xxxxxxxxxxxxx wrote:
>Hi,
>This is an early production CTC169HN chassis.
>
>I've already replaced the caps & Diodes in the Horizontal output section,
>& recapped the power supply. I've replaced the AFT Video det & AFT coils.
>
>Now, my last problem is that the picture pulses on / off at turn on. If I
>let it pulse for a minute or two, it'll stop. This is the one I'm having
>trouble with.
>
>The power supply on the PTV AUX board is pulsing. The raw B+ that comes in
>from the main board checks OK.
>
>I've replaced Q7051 the turn on transistor, and shorted Q7051 C-E as a test.
>
>The voltage at U7004 - 4 is running about .4V instead of .89V that is
>called for. The voltages at pin 3 (current sense input), and pin 1 are
>right on. I've tried heating & cooliing, in hopes of finding a bad cap.
>
>I'm hoping that someone has seen this before, and can point me in the
>right direction.
>
>Thanks,
>
>John Myers
>Myers TV Service Since 1984
>Alliance, OH
>ph 330-821-6545
>
>-----------------------------------------------------------------------------
>Jokes, complaints, off topics, general chat. Everything other than repair
>help problems can be found at this new list. No archives and posts will not
>be found on Google or any other engine!To remove or join, click:
>mailto:ecartis@xxxxxxxxxxxxxxx?subject=subscribe%20chat
>Send to the list at chat@xxxxxxxxxxxxxxx once subscribed.
>-----------------------------------------------------------------------------
>Lost Password:
>http://www.tech-assist.org and select "Login Problems?".
>Email Archives:
>//www.freelists.org/archives/techassist/
-----------------------------------------------------------------------------
Jokes, complaints, off topics, general chat. Everything other than repair
help problems can be found at this new list. No archives and posts will not
be found on Google or any other engine!To remove or join, click:
mailto:ecartis@xxxxxxxxxxxxxxx?subject=subscribe%20chat
Send to the list at chat@xxxxxxxxxxxxxxx once subscribed.
-----------------------------------------------------------------------------
Lost Password:
http://www.tech-assist.org and select "Login Problems?".
Email Archives:
//www.freelists.org/archives/techassist/
Other related posts:
