[TechAssist] Re: Sony KP-41S3U - Shut down after two hours
- From: "Damon" <damoneb@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 26 Jul 2005 08:18:19 -0500
Hmmmm, "After two hours or so, the picture collapses into a small white
square and leave the set tripping."
I wonder if that's "Wee-lang" for "blows the fuse", or "Ka-thunk Ka-thunk
Ka-thunk.......our version of starting/stopping of the SMPS".
I'll lean towards Ka-thunk-ing
If so, you'll need to monitor the Horiz B+ (129V?) supply and the 9 Volt
supply regulator and see if they are stable.
I believe the problem could be the Vertical Sawtooth from the video IC
dropping out...but that doesn't create a "square"
it normally creates a "flat line". Loss of 129V would cause the "square"
most likely.
That supply does the Horiz output, the HV output and the HV regulator.
Of course we don't have schematics from UK, so this info comes from US-based
circuitry.
Damon B
Telrad Electronics
Fort Wayne IN
----- Original Message -----
From: <tjanphyl@xxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Sunday, July 24, 2005 7:00 PM
Subject: [TechAssist] Sony KP-41S3U - Shut down after two hours
> Wee emailed me from the UK on this Sony. Here's his message.Maybe we
> can assist.I will forward any responses.Thanks,folks,
> Phil
> -----------------------------------------------------------------------
> ---------------
> Dear Phil,
>
> I have now got this huge kit in my workshop and eating up bench space.
> After two hours or so, the picture collapses into a small white square
> and leave the set tripping.
> When it is allowed to cool down, the picture recovered and does the
> same thing again after two hours or so.
>
> What must I look for this type of fault ?
> The convergence is another thing but can be adjusted via the handset.
>
> I hope you can lead me to the faulty area with your experience in
> repairing Projos.
>
> -----------------------------------------------------------------------
> ---------------
>
> Phil Bader, Pres.
> Jan Phyl TV Inc
> Winter Haven, Fl
> (863) 299-8821
> estab. 1976
> --------------------------------------------------------------------------
---
> This Email List is Public. Remove: http://www.tech-assist.org/remove.htm
> Set Vacation
mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation
> Lost Password: http://www.tech-assist.org and select "Login Problems?".
> Email Archives: //www.freelists.org/archives/techassist/
>
-----------------------------------------------------------------------------
This Email List is Public. Remove: http://www.tech-assist.org/remove.htm
Set Vacation mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation
Lost Password: http://www.tech-assist.org and select "Login Problems?".
Email Archives: //www.freelists.org/archives/techassist/
Other related posts:
