- 4 -
Adjustment purpose
[C/W Motor Drive Circuit]
2. C/W Delay
Symptom when
incorrectly adjusted
Measuring
instrument
Test point
EXT trigger
Measurement
range
Input signal
Input terminal
To adjust the timing of the C/W segment (R, G, B, and W) and that of the
DMD driving signal.
Incorrect color. For example, the pure red is displayed with a tinge of
pink or orange.
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XGA signal (Red scale signal. The red scale
image file is provided by a CR-ROM)
COMPUTER IN terminal
* Carry out this adjustment only when the UNIT-OPTICAL or C/W-MOTOR is
replaced.
* Use the FUNCTION menu for this C/W delay adjustment. To display the
FUNCTION menu, select [LANGUAGE] in the OPTION menu and press the
[ENTER/STILL], [+], and [ENTER/STILL] buttons on the remote control. [C/W
Delay] will be found on the FUNCTION menu.
1. Set the following items for the picture quality.
CONTRAST . . . . . . . . . . . . . . .0
BRIGHTNESS . . . . . . . . . . . . .0
COLOR TEMP . . . . .STANDARD
COLOR MATRIX . . . . . . . . .OFF
2. Project an image on the screen.
3. Supply a (red scale signal).
4. Display the FUNCTION menu and select [C/W Delay].
Adjustment range
: 0 to 1023
Initial value
:
512
5. Adjust the value for correct red.
A tinge of pink increases as the value is adjusted toward 0. A tinge of orange
increases as the value is adjusted toward 1023.
6. Make sure that all the shades of the red scale signal are displayed correctly.
7. The newly entered value is saved automatically. Press the [MENU] button to
exit the FUNCTION menu.
* In the SVGA model (SD200U), flicker may appear when the C/W delay is
adjusted to a certain value. This is unique to this model. Carry out the following
procedure to prevent flicker and change the C/W delay setting to a value at which
the colors of the red scale signal are displayed properly and no flicker appears.
Change of the C/W delay setting has little effect on the colors because some
amount of deviation from the optimum setting value is allowable in the C/W delay
adjustment.
(1) The C/W delay setting value is referred to as N.
(2) Change N to (N-80).
(3) Increase (N-80) to (N+30) one by one per second.
(4) When no flicker appears during increase, N is appropriate.
(5) When flicker appears, change N to a value out of the range in which flicker
appears referring to the following example.
(6) Make sure that all the colors are displayed properly with the red scale signal.
Example)
When N has been set to 700, change N to 620 and increase it to 730 as described
above. If flicker appears at 640 in the course of increase, set N to 720. 720 is
obtained by adding 20 (640-620) to 700. Make sure that all the colors are
displayed properly with the red scale signal.
Summary of Contents for SD200U
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