[TechAssist] Re: 2nd request*Sharp 27RV79, dead, relay clicks
- From: "Shoreline Electronics" <jstielau@xxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 28 Oct 2002 08:22:45 -0500
Jeff,
Pick up a Sams for the set.....no need to guess ! Sams 2769 -2
I'm sure someone out here in the tech group has a copy they will share.
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: <techassist@xxxxxxxxxxxxx>
Sent: Sunday, October 27, 2002 11:09 PM
Subject: [TechAssist] 2nd request*Sharp 27RV79, dead, relay clicks
>
> Original message below.
> One more try before I give up on this one.
> All three regulators on main board are OK.
> I'm missing the 9vdc and 12vdc for the jungle chip. I'm having trouble
tracing
> back the 12vdc.
> Raw B+ is high, around 160vdc, Regulated B+ is low, around 106vdc, which
changes
> when I adjust AC voltage.
> There is no signal to the HOT.
> SCR tests fine as well as it's zener.
> My only guess is FBT, which rings OK, maybe be breaking down under load,
but too
> expensive to replace.
> I removed the HOT and 106vdc did not change. I did remove the FBT to test
and it
> rings just fine.
> On regulator IC, I don't have the 18vcc on pin 7.
> If anyone has any other ideas, I'm all ears.
>
>
> Jeff
> FAX 717-564-4952
> Intrepid Video & Electronics
> 501 Luther Rd
> Harrisburg PA 17111-2055
> Be careful of your thoughts.
> They may become your words any moment.
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>
> ----- Original Message -----
> From: "Tech Repair CD support" <support@xxxxxxxxxxxxxxx>
> To: "Techsonline" <techassist@xxxxxxxxxxxxx>
> Sent: Thursday, October 24, 2002 10:28 PM
> Subject: [TechAssist] Sharp 27RV79, dead, relay clicks
>
>
>
> This set still has me stumped.
> B+ is low, 105vdc, I've checked all resistors, diodes and caps and can
find no
> problems.
> The relay click when I press power. I ruled out the relay as being the
problem.
> D2713 cathode is 161vdc, s/b 148vdc
> FBT pin 9 = 105vdc
> I can find no problem components. Has anyone found anything on this
chassis to
> break down under load, possibly?
> Thanks for any suggestions.
> I do have a schematic, but still have problems
> 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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