[TechAssist] Re: Fix: PCJ522R Won't come on, Q473 assy shorted
- From: "tvservice" <tvservice@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 29 Dec 2004 17:11:53 -0600
crt board failure on some Samsung models has been a problem. usually find
video amp ic on the red board to be the culprit. some models had improved
circuit boards with extra ground leads and to add extra ground to the
deflection board.
this model is one that is very well known for leaky coolant so look
carefully for leakage.
Robert
tvservice@xxxxxxxxxxxxx
H & H Electronics Inc
----- Original Message -----
From: "Jeff Farnsworth" <jlfonz@xxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, December 29, 2004 4:32 PM
Subject: [TechAssist] Re: Fix: PCJ522R Won't come on, Q473 assy shorted
> I thought I was the only victim of this--witht the exception that the HOT
> hadn't blown. Inside of socket looked like it had gotten wet---green
> corrosion
>
> TV Doctor
> Avalon, Wi
>
> ----- Original Message -----
> From: "Ronnie Alston" <raalston@xxxxxxxxxxxx>
> To: ""Tech Assist"" <techassist@xxxxxxxxxxxxx>
> Sent: Wednesday, December 29, 2004 9:07 AM
> Subject: [TechAssist] Fix: PCJ522R Won't come on, Q473 assy shorted
>
>
> > Replaced shorted Q473 assy. (hor output transistor, fet) DZ401, R486 .6
u
> > 2w.
> > Replaced parts and when turned on both transistors would promptly get
hot.
> > Fix: replaced picture tube socket, focus portion was arcing internally.
> > Note: No fluid coolant found on socket pcb.
> >
> > Ronnie Alston
> > Alston's TV Service
> > 110 North Third Street
> > Ozark, Ark, 72949
> > raalston@xxxxxxxxxxxx
> >
> >
>
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