Sharp XG-MB67X, Service Manual

Page: 24 / 128

XG-MB67X
7 – 1
XG-MB67X
Service Manual
CHAPTER 7.
ELECTRICAL ADJUSTMENT
[1] ELECTRICAL ADJUSTMENT
No. Adjusting point Adjusting conditions Adjusting procedure
1 EEPROM initialization 1. Turn on the power (with the lamp on) and
warm up the set for 15 minutes.
•
Make the following settings.
Press S2551 to call the process mode and execute
"SS2" on SS menu.
2 Model setting (Process menu)
1. Select the following group and subject.
Group: CONFIRM
Subject: MODEL 1. Set as below.
Default: 1
3 Adjustment of CW index 1. Signal input: Send 256 STEP color bar.
XGA series (XGA60HZ)
2. Select the following group and subject.
Group: ADJUST
CW/Auto KS
Subject: CW-INDEX. 1. Feed the signal to input 1.
2. Select the adjustment item and adjust the lamp gra-
dation patterns of RGBW so that smooth patterns
without noise appear.
4 R/G/B contrast adjustment
(manual or automatic) 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) 1. Measure chromaticity of the 96% white wind pattern
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.
5 RGB white balance adjustment 1. Feed the 50% gray signal.
XGA series (XGA60HZ)
2. Select the following group and subjects.
Group : ADJUST
AD/DLP
Subject : R-GAIN
G-GAIN
B-GAIN 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
6 sRGB white balance adjustment 1. Feed the 50% gray signal.
XGA series (XGA60HZ)
2. Select the following group and subjects.
Group : CONFIRM/DLP
Subject : S-G-OS
S-B-OS 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
7 Auto keystone initialization
and audio output check Select the following group and subjects.
Group : ADJUST
CW/Auto KS
Subject : CAL 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.
2. Check that the start-up sound is heard from the
speaker when the ENTER key is pressed.
R
G
B
W