[TechAssist] Re: Hitachi 53UWX10B Convergence adjusting
- From: "Leonard Caillouet" <lcaillo@xxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 17 Oct 2005 11:02:25 -0400
Damon,
You could have a problem in the DCU or some corrupt EEPROM data. Follow
that convergence guide from the beginning and you should be OK, but you will
likely need to clear the memory and start from scratch.
I have not seen large variances in these chips, but have seen lots of bad
ones from all of the suppliers. There is no difference in the ones from
Hitachi. Overall, the ones from Toshiba seem to have been most reliable,
but it likely has more to do with which batch they come from from Sanyo.
Leonard Caillouet
Electronics World
1261 NW 76 Blvd
Gainesville, FL 32606
352-332-5608
352-332-5668 fax
----- Original Message -----
From: "DAMON BRUNGER" <damoneb@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Sunday, October 16, 2005 12:42 PM
Subject: [TechAssist] Re: Hitachi 53UWX10B Convergence adjusting
IOW -read the manual right?? I have been researching this on Hitachi's
Website, and I have not seen any bulletins that describe this, ALTHOUGH
PTV 01-04 "Convergence & Symmetry Adjustments"
bulletin talks about R/B offsets and Horiz size/position settings.
I wonder if Vertical Symmetry is also important (not mentioned) .
I've had 3 PTVs with the same response, it still seemed to have 2-3 points
on thetop/bottom line that was near the "point of distortion" .....it makes
me think that something "outside"has been introducedinto the
equation....that's why I'm wondering if theSTK392-110's may be a tighter
quality from Hitachi...and if the R/B offsets (untouched) would also affect
center? The only adjustments deemed necessary is on the extreme Left/Right
and Top/Bottom...Center seems aligned on all 3 units.
(Quick Note: Thanks Jerry, I do take your suggestions Quite Seriously)
Yesterday I finished up another Hitachi with a set of Non-Hitachi amps, and
the same thing happened....and it must be the Vertical section of either the
Red or Blue only. I had the distortion/snaky line only on the bottom
(another clue?) and only on the left side..and ONLY with the RED.
That snaky line is another point of discussion, but I have balanced moving
the line.... by counting how many presses of the alignment button for 3-4
points I have done.....but still the snaky-ness appears...I wonder if the
distortion and snaky-ness (in the same exact area) are related....
I know there's a Guru here...is it Alvie? From Hitachi?? But I am more
interested in Tech's experiences and their FIXES.....and things Alvie(?) has
told them.....
Damon (Arrrgh! I need to become a Hitachi Expert by Tomorrow!) Brunger
Telrad Electronics
Fort Wayne IN
----- Original Message -----
From: "J Silverman" <greentron@xxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Saturday, October 15, 2005 5:59 PM
Subject: [TechAssist] Re: Hitachi 53UWX10B Convergence adjusting
> Hitachi has all that information on their web site. There are also some
> none-intuitive adjustments in the instructions that might have something
to
> do with your problem.
> Jerry Silverman Greentron Inc
> Mail to: greentron@xxxxxxx
> 4 Newland Ave Greenville SC
> 29609 864 232 3889
> ----- Original Message -----
> From: "DAMON BRUNGER" <damoneb@xxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Saturday, October 15, 2005 8:03 AM
> Subject: [TechAssist] Hitachi 53UWX10B Convergence adjusting
>
>
> > I'm asking this question because we're really starting to do some more
> work
> > on the HITACHI Digital Convergence systems, and I've had this problem
> occur
> > on the last 3 units I've serviced.
> > Hitachi EXPERTS....I need YOUR INPUT.
> >
> > Have you ever had the Hitachi PTVs causing REALLY BAD alignment problems
> > AFTER replacing the Convergence IC's?? Does the Hitachi TV require
> > "Hitachi-Only" Convergence AMPs?
> >
> > I tell you what.....it's bad enough to do minor touch-up....but when the
> top
> > or bottom lines >>ALWAYS<< seem to be the failure point on
> > Hitachi's.....that's when you start wondering if you should switch from
> > MCM/Tritronics "Standard" STK392-110's to "Hitachi-Only" Amps (which by
> the
> > way...are available FROM Tritronics....or so my boss says...)
> >
> > Now if you want to know the symptoms....the Top OR BOTTOM lines "seem"
to
> > Pop way out of adjustment,
> > [[you're adjusting it....it "smoothly" is approaching the point of
> > alignment....it's getting closer, and closer....closer.....POP! IT's 6
> > inches past the point of alignment....and distorting.]]
> > Using the "centering magnets" to re-center the offending color doesn't
> seem
> > to help.
> >
> > The problem is always around the corners, normally the top/bottom lines
> > cannot be properly adjusted....I don't remember if the left/right lines
> have
> > ever had this situation occur, since I have only serviced 3.....yes 3
> > Hitachi PTVs in 2 years!!
> > That's why I need input from the Hitachi EXPERTS! TIA, and I really mean
> TIA
> >
> > Damon B
> > Telrad Electronics
> > Fort Wayne IN
> >
> >
>
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