XG-P20XE. Version 1.4 - Sharp Projector Handy Guide. Page 42

42

No.

Adjustment Items

Adjustment Conditions

Adjustment Procedures

7

Sample-and-hold pulse
phase
RCK-PHASE
GCK-PHASE
BCK-PHASE

1. Feed the XGA mode 75-Hz black
signal.
2. Make the following choice:
Group : OUTPUT 3
Subject : SH-PHASE
(Have the standard level at 8.)
Fix the GCK-PHASE settings all to 8.

Using the control switches or the remote
controller buttons, make sure that the
“OUTPUT 3” characters are not blurry and
there is no ghost image. If such blur or ghost
occurs, finely adjust the setting in the range
of 7~9.

8

RGB countervoltage
adjustment

1. Feed the black-and-red (25%)
stripe signal (XGA).
2. Make the following choice:
Group : OUTPUT 3
Subject : RC (R)
: BC (B)
: GC (G)

• 

Using the control switches or the
remote controller buttons, adjust the
data in order to minimise the flicker.

• 

Make the same adjustment for BC (B)
and GC (G).

• 

See if the image is equally adjusted at
the centre and both sides of the screen.
If not, readjust the setting to have the
image equal at right and left.

9

RGB gradation
regeneration
adjustment

1. Feed the INFO COM. Grey scale
and colour bar pattern.
2. Make the following choice:
Group : OUTPUT 1
Subject : G1-BLK

• 

Make sure that scale (white side) to
No.251 and scale (black side) to No.8
can be seen.

• 

If white scale can't be seen properly,
readjust with G1-BLK.

10

RGB white
balance

1. Feed the 32-step grey scale signal
(XGA 60Hz).
Group : OUTPUT 1
Subject : R1-BLK (R)
R1-GAIN(R)
B1-BLK (B)
B1-GAIN(B)

Adjust the R1-BLK and B1-BLK data for the
black balance on the gray scale. Then adjust
the R1-GAIN and B1-GAIN data for the
centre-to-white balance on the grey scale.
(Adjust to the best point.)

11

Horizontal centre

1. Feed the NTSC monoscope pattern
signal.
2. Group : VIDEO 1
Subject : NTSC-H

Using the control switches or the remote
controller buttons, adjust the data to have
the same overscan.

12

Video brightness
adjustment

1. Feed the baseband (0 step grey
scale :0% Black to 100% White)
signal.
Group : VIDEO 1
Subject : BRIGHT
2. Press the control switch or the
remote control’s mute button (to set
the gamma correction to the process
setting).

Using the control switches or the remote
controller buttons, adjust the setting until the
black signal (0%) becomes bit-less.

13

Video picture
adjustment

1. Feed the split colour bar signal.
Group : VIDEO 1
Subject : PICTURE
2. Connect the oscilloscope between
pin TP1201and GND.

Using the control switches or the remote
controller buttons, adjust the white to white
(100%) level difference to 2.2 ± 0.05 Vp-p.