[TechAssist] Re: RCA DTV307 chassis HEADS UP!!!!
- From: "tvservice" <tvservice@xxxxxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 18 Nov 2002 10:07:08 -0600
Walter,
read carefully and pay close attention to the last paragraph
it explains saving data and if you "auto convergence" after alignment before
saving data w/V84 option
it will default back to previous alignments
HTH
DTV307
Convergence Mode
During digital convergence mode, the display will blank
incoming video allowing only the digital convergence
crosshatch pattern with the cursor at the center location. The
initial adjustment is red. Green is fixed. Red and blue will be
aligned to green.
The volume and channel buttons will provide adjustment of
the selected cursor location up, down, left and right in single
steps. The cursor position is indicated by a crosshair. The
intersection of the highlighted crosshair is the alignment
currently being adjusted. Note only a portion of the crosshair
will be seen when it is positioned to adjust the off-screen
points along the picture edges. Use the small line segments
that extend to the picture edge to adjust these points.
NOTE: In the extreme diagonal positions, the
cursor is invisible but the point is still adjustable. Do
not adjust these off-screen corner points.
For best results, adjust the pattern beginning at the upper
left of the screen. Then continue the adjustments from left to
right and top to bottom as if reading a book.
The four navigation "MOVE" buttons adjust the movement
of the selected color at the cursor point. They will move the
alignment point for the selected color up, down, right or left.
Adjust so that it is centered on green with minimum fringing
on either side.
The "SKIP" button will toggle the display through
4 states:
1. Yellow crosshatch, Yellow cursor, Red
adjustment, no other OSD or video.
2. Cyan crosshatch, Cyan cursor, Blue adjustment,
no other OSD or video.
3. White crosshatch, White cursor, no adjustment
available. Used to observe convergence results.
4. Green crosshatch, Green Cursor.
The PWR button returns the receiver to normal operation,
however the adjustments are not stored to EEPROM. More on
the actual storing of data to the digital convergence EEPROM
later.
Digital Convergence Alignment Overview
There are four convergence modes in the DTV307
corresponding to the four deflection (scan) modes. Each
requires complete convergence alignment and stores the
alignment points in separate EEPROMS. There is also
another EEPROM containing convergence data installed at
the time of manufacture. It is always available to allow a
"starting" point in cases where catastrophic failure of
convergence data has occured. This EEPROM is larger than
the others and contains reference data for all four scan modes.
As previously discussed, there are also four service menu
locations associated with digital convergence. They are:
V: 80; The main digital convergence
location.
V: 82; PTV sensor positioning.
V: 83; Restore factory Digital Convergence
values.
V: 84; Save current alignments.
V:80 is the main digital convergence menu. It contains an
"all-points" adjustment procedure very much like the
CTC195. When convergence alignments are complete, the
technician exits this menu by pressing "On/Off" on the remote
control or "Power" on the front panel. Convergence
alignments for the selected scan mode are stored in the current
mode EEPROM at this point and will be used until they are
changed during the next menu V:80 alignment procedure or
the consumer accesses the "Auto-Convergence" procedure.
In that case, the original factory alignment data will be placed
back into the EEPROM and the screen aligned to the faulty
data.
To prevent this, once alignments are complete for the
selected mode, the service menu must be entered again, this
time V:84 will be selected. At V:84, press CH UP. This
transfers the new alignment data for the selected deflection
mode to the factory EEPROM. Then the service menu is
decremented to V:82 and CH UP is again pressed. This starts
a routine to allow the optical sensors located on the screen
frame to "memorize" the new alignment data. It looks similar
to the consumer "Auto-convergence" procedure. Once the
routine is completed "Auto-convergence" will function
correctly, returning the screen to the convergence setup by the
technician. This new data becomes the "factory default" data
from this point forward, only changing if a new set of
alignments is placed into the EEPROM using the same
procedure.
Robert
tvservice@xxxxxxxxxxxxxxxxxxx
H & H Electronics Inc
----- Original Message -----
From: "walter wood" <wwood_38478@xxxxxxxxx>
To: "Tech Assist" <techassist@xxxxxxxxxxxxx>
Sent: Friday, November 15, 2002 3:28 PM
Subject: [TechAssist] RCA DTV307 chassis HEADS UP!!!!
>
> I hope this saves someone some time.
> I had to replace a yoke on this set, and the
> convergence needed minor adjustment.
> I tried to adjust it manually,using the procedure
> in the ESI manual(CD-ROM) for this chassis.
> I was not successful.
> I then tried to use Chipper Check.
> That doesn't work either, and Sencore's guy seems
> nice enough, and tried, but has no real knowledge
> on the thing.
> And Sencore's application engineer, has yet to
> return my calls.
> So, back to trying to converge manually.
> The HEADS UP is that on pages 3-12 and 3-13 of the
> alignment procedure is WRONG!!!!!
> In order to exit the main convergence menu, V80,
> one has to press INFO on the remote.
> The manual says to press ON/OFF or Power.
> And the adjustments are not saved, and all yuor
> work in in vain.
> I don't understand why it took 5 calls to tech line
> before someone could tell me this.
> HTH
> Walter
>
> =====
> Walter Wood
> Future Tech Home Center
> 2786 Hwy. 43 N.
> Lawrenceburg Tn. 38464
> 931-829-3337
> Fax 931-829-4044
> mailto:wwood_38478@xxxxxxxxx
>
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