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Adjustment Procedures
[A/D Pre-Amplification Circuit]
1. Clamp Level
Measuring
---
instrument
Test point
---
EXT trigger
---
Measurement
---
range
SVGA signal
Input signal
(Green,No.03)
Input terminal
COMPUTER IN terminal
Adjustment purpose
To set DC level of a picture signal to be entered to A/D converter.
Symptom when
Monochrome picture has a color tint.
incorrectly adjusted
* Enter the adjustment command in small alphanumeric letters.
1. Connect this PROJECTOR to a personal computer (with Microsoft
95 Operating System). (Refer to the figure on P.1)
2. Start Microsoft
3. Start the communication program [Hyper Terminal] in Microsoft
to open the window. (For setting, refer to Hyper Terminal setting on P.2)
COMPONENT VIDEO
4. Supply an SVGA signal (Green, No. 03).
5. Enter [00 ~ 71] (VIDEO input clamp adjustment command) to the Hyper
Terminal window and automatic adjustment will start.
6. The return command [00 ~ 7111] is displayed on the Hyper Terminal Window
after the adjustment. The last 2 figures of the return command indicate the
adjustment result and each figure corresponds to R-Y and B-Y. The figure, 1
means the adjustment has been successful. The figure, 0 means that the
adjustment has failed caused by faults on PCBs, wrong signals or wrong input
selection.
Windows
95 in the personal computer.
Windows
Windows
95
3
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