[TechAssist] Re: Sharp combo 25VTJ100..not regulating.
- From: "Shoreline Electronics" <jstielau@xxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 16 Oct 2002 07:34:15 -0400
We've seen problems with the KIA7805 regulator on some of these sets. Look
for it in the center of the main board.
If the 5V output doesn't come up rock steady , the SMPS keeps pulsing. If
your seeing this , change it!
Strange but true!
Jeff Stielau
Shoreline Electronics Repair
125 Beech Tree Lane
Westbrook, CT 06498
860-399-1861
860-664-3535 (fax)
jstielau@xxxxxxxx
----- Original Message -----
From: "Tech Repair CD support" <support@xxxxxxxxxxxxxxx>
To: "Techsonline" <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, October 15, 2002 10:08 PM
Subject: [TechAssist] Sharp combo 25VTJ100..not regulating.
>
> Unit came in with what sounded like a heart beat through speakers..no
power up.
> Not regulating, I have no print.
> I have voltage that jumps from 17.5vdc to 18vdc and back on pin 4 of
STRF6515 and
> 163vdc on C705, sounds high.
> Supply voltage to my 9v reg is jumping around like crazy.
> Checked my caps in these areas and resistors and all check OK.
> Power button has no effect and nothing on HOT, but I do get a chirp when I
plug
> unit in.
> Has anyone seen this?
> Thank you.
>
> Jeff
>
> FAX 717-564-4952
> Jeff Dougherty
> Intrepid Video & Electronics Be careful of your thoughts.
> 501 Luther Rd They may become your words
> Harrisburg, PA 17111 any moment.
> 717-909-8844
> VCR tips, electronics info & general interest.
> www.intrepid-video.com www.tech-repair.net
> www.thetoolcaddy.com www.9-11-2001tragedy.com
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