Sharp XG-NV4SU Service Manual page 30

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XG-NV4SU
I
No.
Adjusting point
Adjusting conditions
Adjusting procedure
23
RGB
1. Receive the RGB signal.
l
In the process mode and select
L4.
Check the pic-
performance
ture, brightness,
red, blue, clock, phase, horizontal
check
position, and vertical position.
24
Off-timer
l
In the process mode and select OFF. Make sure that
performance
the off-timer starts with "5" (minutes),
counts down
check
each minute in 1 second, and turns off the set at "0".
25
Thermistor
1. Heat the thermistor using a
l
Make sure the "TEMP" is displayed.
performance
dryer.
check
26
Factory settings
0
Make the following
settings.
~1
27
Automatic
1. Receive the PHASE check
l
Call the VGA/S-VGA/XGA
mode and make sure
synchronization
pattern signal.
that the clock, phase, horizontal
and vertical posi-
i
tions can be automatically
adjusted.
ADJUSTING THE PC BOARD (CPCi-0029CE01.
PC l/F Unit)
1. Initializing the EEPROM
1)
Press the S5001 key to call the process mode.
2)
Execute Sl on the SSS menu. (The Sl is used to initialize the PC board alone. Do not execute S2 because
othetwise
all the adjusted data but the PC board will be initialized.)
2. Adjusting the level settings
2-l. Oscilloscope range setting
Set the range to DC lV/div.
and 5us/div.
2-2.
Input signal
Feed the SVGA 800x600 60Hz gradation waveform signal.
2-3.
Adjusting and checking the level settings
1)
Press the S5001 key to call the process mode.
2)
Adjust the SH-PHASE
setting on the "OUTPUT
3" menu until the "OUTPUT 3" characters
are not blurry any
longer.
3)
Connect a oscilloscope
to TP2. Adjust the BRIGHT setting of "OUTPUT 2" to have the black level of the signal
at I .7V.
4)
Adjust the ROS setting on the A/D menu until the voltage at the positive pole of C64 or pin (2) of ICll
becomes
1.7v.
5)
Adjust the GOS setting on the A/D menu until the voltage at the positive pole of C57 or pin (2) of ICI 0 becomes
1.7v.
6)
Adjust the BOS setting on the A/D menu until the voltage at the positive pole of C50 or pin (2) of IC9 becomes
1.7v.
7)
Make sure the GAIN setting on the A/D menu is 163.
8)
Connect the oscilloscope
to TPl . Adjust the R-D setting on the A/D menu until the white top level of the signal
becomes 3.6V. (Make sure that both the black and white graduations
are visible clearly.)
9)
Connect the oscilloscope
to TP3. Adjust the B-D setting on the A/D menu until the white top leve
becomes 3.6V. (Make sure that both the black and white graduations
are visible clearly.)
10) Connect the oscilloscope
to TP2. Adjust the G-D setting on the A/D menu until the white top leve
becomes 3.6V. (Make sure that both the black and white graduations
are visible clearly.)
11) Increase the brightness
level of OUTPUT 2 by 10 points.
12) Press the S5001 key to exit from the process mode.
of the signal
of the signal

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