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(8) Change the value of R·BIAS, B-BIAS, R-GAIN, and B-
GAIN from those of step (6) according to
the following
list.
R
B
BIAS
+100
+100
GAIN
·100
-100
NOTE:
If the dark part quality is not good for the above
adjustment, set to Adjustment Mode 1.
Focus Adjustment
1. Equipment
to be used
AGB Signal Generator: Cross Hatch Pattern
RGB input
HDTV Signal Generator: Monoscope Pattern
RGB input
NTSC Signal Generator. Monoscope Pattern
VIDEO input
2.
Initial
conditions
Adjustment Mode: Normal Mode
3. AdJustment Procedures
(1) Receive a 33.750kHz RGB Cross Hatch Pattern signal.
(2) Adjust FOCUS 1 VR on FBT (Refer to the previous
page) to focus line A and Band to equalize the focus
quality of each line.
(3) Adjust FOCUS 2 VR on FBT {Refer to the previous
page) to focus line C.
(4) Repeat step (2) and (3) until the focus becomes best.
(5) Change the input signal to the others (HDTV signal and
NTSC signal) and check the focus each.
FOCUS2VR
----- C
FOCUS 1 VA
~
A
B
•
1
DT-M3050W
Video Amplitude and Position
Adjustment
C,
V, E-P.C. Board
1. Equipment
to be used
Video Signal Generator; Cross Hatch Pattern ( 15 vertical
lines and 13 horizontal lines)
VIDEO input
2.
Initial
conditions
SCAN;
OVER
Adjustment Mode: Adjustment
Mode
2
3.
Adjustment Procedures
(1) Receive the NTSC Cross Hatch Pattern signal (15
vertical lines and 13 horizontal lines).
(2) Set ASPECT to FULL with the remote control unit.
(3) Adjust the Cross Hatch Pattern to 5.5 horizontal lines
each in its upper and lower part with the SIZE control
of the remote control unit.
(4) Adjust VIDEO H CENT VR (R5570 on C-P.C. Board) to
equalize the distance between the upper horizontal line
and the screen top and that between the
lower
horizontal line and the screen bottom.
(5) Set ASPECT to NORMAL.
(6) Straighten both vertical outlines of the picture with
the
PIN control of the remote control unit.
(7) Adjust VIDEO BLK ADJ 1 VR (R1435 on V-P.C. Board)
unti the right-side amplitude of the picture becomes
maximum and Its movement stops. Mer that, adJust
that VR to back the picture 5mm from the stopped
position.
(8) Adjust VIDEO BLK ADJ 2 VR (R1448 on V-P.C. Board)
unti
the
left-side amplitude of
the
picture becomes
maximum and its movement stops. After that, adjust
that VR to back the picture 5mm from the stopped
position.
(9) Set ASPECT to FULL.
(1 O) Adjust the Cross Hatch Pattern to 7.5 vertical tines
each in
its
right and left part by adjusting H SIZE VR
(R539 on E-P .C. Board) and VIDEO H CENT VR
(R5570 on C-P.C. Board).
(11) Set ASPECT to each mode and check that
the
number
of the vertical and horizontal lines of the Cross Hatch
Pattern is as shown in the following list.
Vertical Lines • Horizontal Lines
FULL
7.5
5.5
ZOOM
7.2
4
NOTE:
If necessary, repeat from step (:2) through (10).
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39
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