[TechAssist] Re: SHARP TV 14A2-S
- From: Craig Harrison <tangmere@xxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Tue, 09 Oct 2001 15:47:09 -0400
It looks like the set is going into shutdown because of the vertical IC
failure. You must replace it for proper operation of the TV.
Craig
VRM wrote:
> Hello,
>
> Can anyone help me provide solution, suggestions and TIPS as to how to repair
> this fault on a SHARP TV Model 14A2-S. The SET was brought in with BURNT
> Power Supply. I checked and fixed the SMPS (STRF 6653) including other
> components.
>
> Currently the power comes on when SWITCHED, but goes into STANDY MODE with
> the POWER LED indicating RED instead of GREEN. During this time the SET
> displays a NOTHING on the SCREEN.
>
> If I use the remote control to power, the LED changes from RED to GREEN, but
> stays on for a MAXIMUM of 10 seconds only, then back to RED, and then the
> remote cannot be used to power the SET again.
>
> After studying the DATASHEET of the VERTICAL DEFLECTOR IC, i.e. TDA 8357, it
> looks like the device has been triggered into protection mode, indicating a
> fualt on the main board. I took out the VERTICAL IC, and then powered the
> SET, this time it came ON indicating RED then suddendly to green, with the
> SCREEN displaying a white HORIZONTAL LINE.
>
> I want to suggest the VERTICAL device to be faulty, but can anyone HELP as to
> next what I should do.
>
> F.Y.I the VERTICAL IC is not available here.
>
> Thanks to ALL
>
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