[TechAssist] Re: Sharp 55R-WP4H Proj TV
- From: Paul <dntwntv@xxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Tue, 17 Aug 2004 12:30:38 -0700 (PDT)
Thats what I heard from someone else and I think one board was around $800.00
and there are 3 boards that any one of, could be the one that needs replacing.
What a great set! This is the 1st and probably the last for me.I originally
thought the convergence circuit was where the problem was. Now can't tell if it
is the cause or the effect. I think the problem is in the standby power supply
but with all of the protect circuits it is difficult to isolate. It could, I
suppose even be a defective micro.
Paul
Gemini Computer & TV <geminitv@xxxxxxxxxxx> wrote:
There probably won't be that much repair history on this set as I believe
Sharp's repair policy is chassis swap (or at least it was) for warranty. I
have not seen one in quite a while. The last one I saw actually had
defective convergence amp IC's but I still had to replace the chassis as per
Sharp's warranty policy.
Bob Waterman, CET® #RI-28
Master Technician License #9109
Service Manager / Parts Manager
Gemini Computer, TV, & Security Alarms
(508)695-7302
(508)695-7769 FAX
geminitv@xxxxxxxxxxx
geminitv@xxxxxxx
www.geminicomputertvsecurityalarms.com
----- Original Message -----
From: "Paul"
To:
Sent: Tuesday, August 17, 2004 1:09 PM
Subject: [TechAssist] Re: Sharp 55R-WP4H Proj TV
> Thanks Hugh, I have the manual. I doubt if many have encountered this
problem before
>
Paul ;
> "Hugh @ Main TV" wrote:
> We have the factory manual on this set if it will help. Nothing in
Winstips
> that sound like this problem.
> Hugh Thornley
> maintv2004@xxxxxxxxxxx
> Main TV
> 636 Main St
> Longmont, Co 80501
> 303-776-6955 Tel
> 303-776-0792 Fax
> ----- Original Message -----
> From: "Paul"
> To:
> Sent: Monday, August 16, 2004 6:17 PM
> Subject: [TechAssist] Sharp 55R-WP4H Proj TV
>
>
> > Need someone that is familiar with this set to help. It will not start
> unless I go through a routine of unplugging any one of the three
combination
> convergence /vert yolk plugs. Then plugging the a/c cord in and then
> plugging the yolk back in. Now the set will start up. If I shut the set
off,
> it will start up again if I don't wait too long. If I unplug the a/c, then
I
> have to remove any of the yolk plugs and repeat the routine. The standby
> voltage does not come up unless I do the routine. One other consideration,
> the print calls for +&- 25 volts for the convergence amps. This supply is
> putting out +&-40v in standby and +&-33V in run. This doesn't seem normal,
> but find nothing. Other standby supplies are normal. I have been going
> around in circles on this thing too long. I have replaced the amps on the
> convergence amp board and a 5v regulator. Every ave. I go down ends up a
> dead end. Have heated and used all my freeze. Have more coming. Tried to
get
> help from factory,wont ta
> > lk to
> > me. Not Sharp ASC. Sorry to write a book but really could use some help.
> >
> Paul
> >
> >
> > Paul ,B
> > Central TV&Video
> > 911W Grand Ave
> > Grover Beach Ca.
> > (805)481-8084
> >
> >
>
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> Paul ,B
> Central TV&Video
> 911W Grand Ave
> Grover Beach Ca.
> (805)481-8084
>
>
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Paul ,B
Central TV&Video
911W Grand Ave
Grover Beach Ca.
(805)481-8084
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