Chapter 4. Electrical Adjustment; Electrical Adjustment - Sharp PG-MB56X Service Manual

CHAPTER 4.
XG-MB55X-L

ELECTRICAL ADJUSTMENT

[1] ELECTRICAL ADJUSTMENT
No. Adjusting point
1 EEPROM
initialization
2 Model setting
3 Adjustment of CW index
4 R/G/B contrast adjustment
(manual or automatic)
5 RGB white balance adjustment
6 sRGB white balance adjustment
7 Auto keystone initialization
(XG-MB67X-L only) and audio
output check
PG-MB56X/PG-MB66X/XG-MB55X-L/XG-MB65X-L/XG-MB67X-L
Adjusting conditions
1) Turn on the power (with the lamp on) and
warm up the set for 15 minutes.
(Process menu)
1) Select the following group and subject.
Group: CONFIRM
Subject: MODEL
1) Signal input: Send 256 STEP color bar.
XGA series (XGA60HZ),
SVGA series (SVGA60HZ)
2) Select the following group and subject.
Group: ADJUST CW/Auto KS
Subject: CW-INDEX.
1) Select the following group and subjects.
Group : ADJUST
AD/DLP
Subject : R-CONT
G-CONT
B-CONT
(Process GAMMA interlock)
2) Feed white signal with the amplitude level
of 96% (0.67Vpp).
XGA series (XGA60HZ), SVGA series
(SVGA60HZ)
1) Feed the 50% gray signal.
XGA series (XGA60HZ),
SVGA series (SVGA60HZ)
2) Select the following group and subjects.
Group : ADJUST
AD/DLP
Subject : R-GAIN
G-GAIN
B-GAIN
1) Feed the 50% gray signal.
XGA series (XGA60HZ),
SVGA series (SVGA60HZ)
2) Select the following group and subjects.
Group : CONFIRM/DLP
Subject : S-G-OS
S-B-OS
1) Select the following group and subjects.
Group : ADJUST
CW/Auto KS
Subject : CAL
4 – 1
Service Manual
• Make the following settings.
Press S2551 to call the process mode and execute
"SS2" on SS menu.
1) Set as below.
MB67X-L : 2
MB65X-L : 4
MB66X : 5
MB55X-L : C
MB56X : D
1) Feed the signal to input 1.
2) Select the adjustment item and adjust the lamp
gradation patterns of RGBW so that smooth pat-
terns without noise appear.
W
R
G
B
1) Measure chromaticity of the 96% white wind pat-
tern using CA100.
2) On the screen where bit dropouts occur, raise the
values of R/G/B-Contrast. Adjust the values so that
bright red, green, and blue bit dropouts appear on
a black background; and amounts of change in x
value of R and y values of G/B become 100/1000
or more.
3) If adjustment is performed manually watching the
screen, make adjustment so that bright red, green,
and blue bit dropouts appear on more than half of
the screen.
1) Raise the values of two of R/G/B-GAIN (default:
100) so that the following chromaticity values are
obtained using CL200.
x value: 300 ± 5
y value: 320 ± 5
1) Adjust S-G-OS and S-B-OS so that the following
chromaticity values are obtained using CL200.
x value: 313 ± 5
y value: 329 ± 5
1) With the set placed on a level surface, press the
ENTER key and check that K-SENS value is 0 ±3.
Check that keystone is caused by tilting the unit.
(XG-MB67X-L only)
2) Check that the start-up sound is heard from the
speaker when the ENTER key is pressed.
Adjusting procedure