[TechAssist] Re: Mitsubishi QV10 Chassis Rear Projection.
- From: Tel-Tek <teltek3@xxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 03 Jun 2005 09:35:45 -0400
Thanks Eric.
I'm looking at a VS-5007 Manual...and it's pretty durn close.
Don't have the VS5001.
-Ed-
Tel-Tek Electronics
Ontario-Canada
teltek3@xxxxxxxxxxxx
teltek@xxxxxxxxx
Eric Manuel wrote:
> 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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