[TechAssist] Re: Mitsubishi QV10 Chassis Rear Projection.
- From: Eric Manuel <tvman@xxxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Thu, 02 Jun 2005 17:35:11 -0230
Hi Ed it,s a VS5001 mits..Eric
Eric
E M Electronics
Deer Lake Nfld
Canada
tvman@xxxxxxxxxxxxxxx
Tel-Tek wrote:
> I guess the Model Number is not worth mentioning, since it's an
> Electrohome but just in case it's PROH50, and very similar to VS-5007.
>
> This set came in with the Vertical O/P (LA7838) blown. Replace it and
> all caps, HV came back up..along with sound.
>
> I have no Video and also no voltage (11.8 volts) on pin 1 of LA7838. I
> presume Beam Limiter/Protector has kicked in. Found a few bad caps in
> that circuit with C5002 10/50volts just about eaten away.
>
> Some of the transistor in that circuit are Q503 Q504 Q507 Q508.
>
> If anyone has wrestled with this circuit, with good results..LMK.
>
> May be just that I'm missing my 12 Volts, but have no idea where it
> comes from.
>
> Also does anyone know how to temporarily defeat this Beam Limiter
> circuit.
>
> Thanks..
>
> -Ed-
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