Mitsubishi SD200U, Руководство по обслуживанию

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Adjustment purpose [A/D Pre-Amplification Circuit]
1. A/D Convertor
Symptom when
incorrectly adjusted
Measuring
instrument
Test point
EXT trigger
Measurement
range
Input signal
Input terminal
To set amplitude of a video signal to be entered to A/D converter.
Incorrectly displayed white portions.
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shown in the Table 1, 2
COMPUTER IN terminal
* Enter the adjustment command in capital alphanumeric letters.
1. Connect this PROJECTOR with a personal computer (with Microsoft

Windows

95/98/Me Operating System). (Refer to the figure on P.1)
2. Start Microsoft

Windows

95/98/Me in the personal computer.
3. Start the communication program [Hyper Terminal] in Microsoft

Windows

95/98/Me to open the window. (For setting, refer to Hyper Terminal setting on
P.2)
RGB
4. Supply a signal (White 100%, No. 01).
5. Enter [00~5] (A/D adjustment command) to the Hyper Terminal window and
automatic adjustment will start.
6. The return command [00~5111] is displayed on the Hyper Terminal Window
after the adjustment. The last 3 figures of the return command indicate the
result of adjustment and each figure corresponds to R, G, and B. in order. The
figure, 1 means that the adjustment has been successful. The figure, 0 means
that the adjustment has been failed caused by faults on PCBs, wrong signals or
wrong input selection.
Adjustment Procedures
No. Pattern
01 White 100%
Table 2
Model Signal
SD200U SVGA
XD200U XGA
Table 1