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DP-4X CHASSIS READ FROM ROM NOTES
BEFORE MAKING ANY DIGITAL
CONVERGENCE ADJUSTMENTS
Heat Run the set for at least 20 minutes.
Do not run Magic Focus before the 20
minutes have passed.
MAKE A
DETERMINATION:
1) There are many situations where the
digital convergence looks as thought it
may need a convergence adjustment.
2) Be sure that it really does before
beginning.
3) READ FROM OLD ROM DATA:
4) In any Hitachi Digital convergence set,
the Old ROM data can be re-read to
place the unit into the last saved
condition. This could be beneficial
before an attempt to make a rather
lengthily adjustment.
5) Enter the DCAM.
•
Press the Service Only switch on the
Deflection PWB.
6) To Read the Old ROM Data, press the
DAY/NIGHT button twice.
•
First press: (Read from ROM?) will
appear on screen.
•
Second press: Screen goes black,
then re-appears with green dots.
•
Press the MUTE button (Volume up/
down pressed in) to return to Digital
convergence grid.
NOTE: The New Remotes used in the DP-4X Chassis must be placed in the DCAM (Digital Conver-
gence Mode) when performed any function when the DCU is activated.
To enter the Remote Control into DCAM see page 08-18.
*DCAM = Digital Convergence Adjustment Mode.
EXAMPLE:
Sometimes the Magic Focus will not run
correctly and will return an error code.
Sometimes after Magic Focus is run but
the convergence appears off after
completion.
OTHER IMPORTANT INFO:
Many times after a complete adjustment,
when initializing the Magic Focus
sensors, an error code will appear,
overflow, Error 4, etc...
When this happens, most of the time it is
because some critical adjustments were
overlooked or skipped.
The below adjustments are very critical
to the complete alignment process and
CAN NOT be overlooked.
•
Vertical Size Adjustment
•
Horizontal Size Adjustment
•
Red and Blue Offset Adjustment
•
DCU Character Adjustment and
data confirmation check
•
DCU Sensor Position Adjustment.
All of the above adjustment can vary
dependant upon the Chassis used. Be
sure to check the Service Manual for
specifics related to values.
2
•
In I
C Bus adjustment: H. POSI
Adjustment
PAGE 08-19
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