[TechAssist] Re: vs7004r mitsubishi shutdown
- From: "Rochester TV" <rochester.tv@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 17 Nov 2005 22:57:57 -0600
Check pin 5 of ic502 for 22.5vdc, if lo change d513 (#264p2440302.)
Check for 20.3vdc at base of Q503, if high look for leaky d511 and d512 off
pin 13 of flyback(#264p045040)
If they are not leaky replace flyback t503 #334p191010
You can change c920 10uf@100vdc off t902 in p/s for it is high failure.
Jeff O'Connor
Rochester TV & Radio
419 Adams Street
Rochester,PA 15074
724-775-7123
rochester.tv@xxxxxxxxxxx
"Specializing in Big Screen's" since 1990
----- Original Message -----
From: "pete" <tvtech@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, November 17, 2005 8:52 PM
Subject: [TechAssist] vs7004r mitsubishi shutdown
>I went to a 70 inch mitsubishi tv set. model is vs7004r. I replaced power
>supply caps and vertical caps plus the vert ic also the ic900 regulator .It
>still shutsdown I hear high voltage and the power supply goes to about 90
>volts before it shutsdown. I want to defeat the failsafe to see why its
>shutting down. I dont have a schematic can someone please send me a print
>on the deflection circuit and the vert. to see why is it shutting down? Or
>maybe give me some pointers on how to troubleshoot this tv set. I have to
>fix it in the house because its too big. any help will be greatly
>appreciated
> thank you
> Pete
>
> Perdomo Tv Inc Since 1972
> Miami.Fl
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