Sharp XG-C55X - Conference Series XGA LCD Projector, Service Manual

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XG-C55X
How to Adjust the PC I/F unit
1. Initialization of EEPROM
1) Press SW2601 to enter the process mode.
2) Execute S1 on the SSS menu. (By S1, the PC board alone is initialized. Do not execute S2, or all the
adjustment data, except for the PC I/F unit, is initialized.)
3) Make sure that the program version "VER. XXX" on the SPECIAL menu is the latest one.
2. Level adjustments
2-1. Setting the oscilloscope
Set the oscilloscope's range to DC1V/div and 5µ S/div.
2-2. Connecting the PC interface
1) Connect the specified cable between ANALOG OUTPUT (on the signal generator) and DSUB connector
(INPUT1 on the projector).
2) Set the projector's input selector to INPUT1.
3) Set the signal generator to XGA mode (1024x768, 60Hz, 32-step gradation). Also adjust the output
amplitude (between black and white) to 700 mVp-p (terminated with a 75-ohm impedance).
4) Turn on the power.
2-3. Adjusting items
1) Adjustment of RGB drive/gain
(1) Feed the window pattern signal that has 100% and 0% signals.
(2) Select AUTO among the A/D items in the process mode and make the adjustments.