[TechAssist] Re: Mag RJ8550AK03 Focus Block question
- From: "Damon" <DAMON101@xxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 28 Nov 2002 06:52:27 -0500
This unit uses 30Kv at the anode and has a 7500 V Focus supply to the Block.
However SOME models actually use 15Kv as the Focus Supply (ie RJ8510 and
8535) so you will have one or the other as your focus supply. I think
there's a 210V supply coming off the HVT that you can monitor and verify the
supply sources are on target, although I'd prefer to check that focus
voltage just to make sure that the focus block has what it needs.
Damon Brunger
damon101@xxxxxxxxxxxxxx
Telrad Electronic Services
Ft Wayne, IN 46815
----- Original Message -----
From: "Eric Haskins" <ehaskins@xxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, November 27, 2002 8:47 AM
Subject: [TechAssist] Re: Mag RJ8550AK03 Focus Block question
>
> Damon,
>
> It appears to be all 3 tubes partially why I am leaning towards HV.
It
> seems like if I could turn the the focus just a little more it would be
> perfect. If I go the opposite way they get really blurry. I didnt really
> notice it as blurry when it was here before customer just complained of it
> at the beginning of the week.
>
> Thanks,
> Eric Haskins
> Eric Haskins Consulting
> Clearwater, FL
>
> ----- Original Message -----
> From: "Damon" <DAMON101@xxxxxxxxxxxxxx>
> To: "TechAssist" <techassist@xxxxxxxxxxxxx>
> Sent: Wednesday, November 27, 2002 7:39 AM
> Subject: [TechAssist] Re: Mag RJ8550AK03 Focus Block question
>
>
> >
> > Are you having problems with the >>Blue ONLY<<??
> >
> > The human eye doesn't detect/process blue very well, and I've never had
a
> > sharp blue focus on any tv out there, but your red and green should be
> > sharp. If you look into the CRTs and adjust the ELECTRICAL focus do
they
> > sharpen up? If not then you may have a focus pack problem or the
> connectors
> > need reseating.
> >
> > Mechanical focus is the 2nd one to test, got a dark room or blanket to
> cover
> > the screen? After adjusting the electrical focus , do the mechanical
> focus,
> > cover
> > the screen and adjust for best picture.
> >
> > Ok, now which color is not right??
> >
> > I just came back to this with more questions......
> >
> > Does it affect ALL crts? ONLY ONE?
> > Can you swap the focus lead on the bad one to a good one and adjust the
> bad
> > one properly? Obviously it would point to the focus pack. Also did you
> have
> > good focus after cleaning out the coolant chambers, then it failed 2
weeks
> > later?? HTH.
> >
> > Although rare, I think I did have a bad focus pack one time, a word to
the
> > wise....don't try to check your connections with power applied, I
learned
> > that the HV anodes are rather leaky connections on these units.
> >
> > Damon Brunger
> > damon101@xxxxxxxxxxxxxx
> > Telrad Electronic Services
> > Ft Wayne, IN 46815
> >
> > ----- Original Message -----
> > From: "Eric Haskins" <ehaskins@xxxxxxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Tuesday, November 26, 2002 10:15 PM
> > Subject: [TechAssist] Mag RJ8550AK03 Focus Block question
> >
> >
> > >
> > > This set is going to be the death of me!!!
> > >
> > > I have checked Lens focus and electrical focus to the best picture. It
> > seems
> > > like I need to turn electrical focus 1/4 turn more clockwise and
picture
> > > would be great. I dont have a HV probe (anymore) but I will borrow
one
> > from
> > > another shop if need be.
> > >
> > > Are these blocks notorious for this?? Heat transfer fluid was replaced
2
> > > weeks ago.
> > >
> > > Eric Haskins
> > > Eric Haskins Consulting
> > > 727-449-1936
> > >
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