Adjusting The Pc Board - Sharp PG-C30XU Service Manual

ADJUSTING THE PC BOARD (CPCi-0047CE01. PC I/F Unit)
1. Setting the oscilloscope
Set the range to DC 1 V/div and 5µs/div.
2. Connecting the PC interface
1) Connect the PC interface to the projector. Make surethe CON2 (P8404), CON3 (P8502) and CON4
(P8405)connectors are all tight in position.
2) Connect the cable between the computer's ANALOG OUTPUTterminal and the DSUB (INPUT1 on the
projector)connector.
3) Set the projector's input selector to the RGB1position.
4) Set the signal generator to the XGA mode (1024 x 768, 60Hz, 32-tone scale). Keep the output amplitude at
700mVp-p.
5) Turn on the power.
3. Adjusting the levels and checking the tones
1) Press the S5001 switch to call up the process mode.
2) Enter 8 for the SH-PHASE setting on the OUTPUT3 menu.
(Adjust to get the on-screen display characters clearand crisp.)
(A/D menu adjustment)
3) R-BRIGHT adjustment: Feed the black signal and adjust the R-BRIGHT setting on the A/D menu screen until
the bitless state.
4) G-BRIGHT adjustment: Feed the black signal and adjust the G-BRIGHT setting on the A/D menu screen until
the bitless state.
5) B-BRIGHT adjustment: Feed the black signal and adjust the B-BRIGHT setting on the A/D menu screen until
the bitless state.
6) R-D adjustment: Feed the white signal and adjust the R-D setting on the A/D menu screen until the bitless
state.
7) G-D adjustment: Feed the white signal and adjust the G-D setting on the A/D menu screen until the bitless
state.
8) B-D adjustment: Feed the white signal and adjust the B-D setting on the A/D menu screen until the bitless
state.
4. DTV adjustment
1) Feed the 480P Y signal to INPUT1. Keep the R (Pr) and B (Pb) without signal input.
2) G-BRIGHT adjustment: Make this setting the same as the G-BRIGHT setting on the A/D menu screen.
3) CR-OFFSET adjustment: Feed the 56% white signal and adjust the CR-OFFSET setting on the DTV menu
screen until the bitless state.
4) CB-OFFSET adjustment: Feed the 56% white signal and adjust the CB-OFFSET setting on the DTV menu
screen until the bitless state.
5) G-BRIGHT correct adjustment = Adjust the value of G-BRIGHT up 6 point.
6) Press SW5101 and exit from the process mode.
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