Chapter 4. Electrical Adjustment; Electrical Adjustment - Sharp XV-Z3100U Service Manual

CHAPTER 4.
XV-Z3100U

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 White balance adjustment
Check items
No. Adjusting point
1 Adjustment of Component offset
2 Adjustment of DLP Brightness
3 Video Contrast adjustment
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-SELECT
1. Signal input: Send 256 STEP color bar to
INPUT5.
(SVGA60Hz or XGA60Hz)
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
Subject : R-CONT
G-CONT
B-CONT
(Process GAMMA interlock)
2. Feed white signal with the amplitude level
of 96% (0.67Vpp) to INPUT5.
(SVGA60Hz or XGA60Hz)
1. Feed the component 75% gray signal to
INPUT5.
2. Select the following group and subjects.
Group : ADJUST
WB
Subject : R-GAIN
B-GAIN
Adjusting conditions
1. Feed 10-step signal with 480P component
100% amplitude.
2. Select the following group and subjects.
Group : ADJUST/AD
Subject : C-R-OS
C-B-OS
(Process GAMMA interlock)
1. Select the following group and subject.
Group : CONFIRM/DLP
Subject :R-BLK
G-BLK
B-BLK
(Process GAMMA interlock)
1. Feed NTSC 100% wind pattern signal.
(Signal with burst)
2. Select the following group and subjects.
Group : CONIRM/VIDEO
Subject : V-CONT
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XV-Z3100U/XV-Z3100/XV-Z3300/DT-510
Service Manual
•Make the following settings.
Press S6213 to call the process mode and execute
"SS2" on SS menu.
1. Set as below.
XV-Z3100 : 1 (default)
XV-Z3300 : 2
DT-510 : 0
1. Adjust the lamp gradation patterns of RGBW so
that smooth patterns without noise appear.
W
R
G
B
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.
1. So that the following chromaticity values are
obtained using CL200.
X value: 298 ± 5
Y value: 319 ± 5
Adjust R-GAIN and B-GAIN
1. Check the fixed value.
C-R-OS : 257
C-B-OS : 256
1. Check the fixed value.
Fixed value : 252
1. Check the fixed value.
Fixed value : 134
Adjusting procedure
Adjusting procedure