Sharp XG-NV5XB, Service Manual

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30
XG-NV5XB
No. Adjusting point Adjusting conditions Adjusting procedure
27 RGB
performance
check 1. Receive the RGB signal.
»
In the process mode and select L4. Check the pic-
ture, brightness, red, blue, clock, phase, horizontal
position, and vertical position.
28 Off-timer
performance
check
»
In the process mode and select OFF. Make sure that
the off-timer starts with “5” (minutes), counts down
each minute in 1 second, and turns off the set at “0”.
29 Thermistor
performance
check 1. Heat the thermistor using a
dryer.
»
Make sure the “TEMP” is displayed.
S4 “Factory setting 4”
Remote controller
setting Process
adjustment
»
Make the following settings. 33 Factory settings
30 Automatic
synchronization 1. Receive the PHASE check
pattern signal.
»
Call the VGA/SVGA/XGA/SXGA mode and make
sure that the clock, phase, horizontal and vertical
positions can be automatically adjusted.
31 IrDA
performance
check
»
Make sure the IrDA signal can be received.
32 Keystone
correction
performance
check
»
Make sure the keystone correction functions well.
ADJUSTING THE PC BOARD (CPCi-0031CE03. PC I/F Unit)
1. Setting the oscilloscope
Set the range to DC 1 V/div and 5µ/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.)
3) Using the BRIGHT setting on the OUTPUT1 menu, adjustthe black level at TP8002 to 1.9 V.
4) Using the ROS setting on the A/D menu, adjust thevoltage at TP8008 (or at pin (2) of IC8011) to 1.7 V.
5) Using the GOS setting on the A/D menu, adjust thevoltage at TP8009 (or at pin (2) of IC8010) to 1.7 V.
6) Using the BOS setting on the A/D menu, adjust thevoltage at TP8010 (or at pin (2) of IC8009) to 1.7 V.
7) Make sure the GAIN setting on the A/D menu is 163.
8) Using the B-D setting on the A/D menu, adjust the whitelevel at TP8001 to 3.6 V. Make sure also the tone
scale(number of tones) is as specified.
9) Using the R-D setting on the A/D menu, adjust the whitelevel at TL75 to 3.6 V. Make sure also the tone
scale(number of tones) is as specified.
10) Using the G-D setting on the A/D menu, adjust the whitelevel at TP8002 to 3.6 V. Make sure also the tone
scale(number of tones) is as specified.
11) Finally press the S5001 switch again to quit theprocess mode.