Sharp VL-AX1S/H Service Manual page 39

Item
(4) Iris AE coarse adjustment
• Measurement terminal:
S terminal luminance signal output
(75 Ω termination)
• Address: "0002" AE_CVT
• Measuring instrument:
Oscilloscope (horizontal sync)
• Object:
Grey scale
• Data variation width:
"0000" to "00FE"
(5) White balance coarse adjustment
• Measurement terminal:
EE output
• Address:
"0128" CGAIN_KR_W
"012A" CGAIN_KB_W
• Measuring instrument:
Vector scope
• Object:
Grey scale
• Data variation width:
"0000" to "03FF"
(6) Color gain coarse adjustment
• Measurement terminal:
EE output
• Address:
"013A" CGIN RYG
"013C" CGIN BYG
"0138" CMAT RYG
"0136" CMAT BYG
amplitude
"07DE" Yellow
phase
"07DD" Yellow
• Measuring instrument:
Vector scope
• Object:
Color bar chart
• Data variation width:
"0000" to "00FF"
(1) Video output is observed with the oscilloscope in the grey scale standard record state,
the data of address "0002" is rewritten, and the luminance signal level is adjusted white
to 760 ± 10mVp-p, gray of the background 420 ± 10mVp-p.
(1) Indication on the vector scope is observed in the grey scale standard record state,
data of address "0128" and "012A" are rewritten, and an adjustment is made so that
the luminous dot is located in the position of burst ratio:
R-Y 0 ± 5%
B-Y 0 ± 5%
(1) The color bar chart is imaged, and the picture angle is adjusted so as to get white level
700 mV. Indication on the vector scope is observed, the data of address "013A",
"013C", "0138", "0136", "07DE"and "07DD" are rewritten, and setting is made so that
the red, blue and yellow luminous dots are located in the following positions. (The gain
of vector scope must be set on 75% amplitude point on the B-Y axis.)
2.15 ± 0.1 time (burst ratio)
Red amplitude
1.75 ± 0.1 time (burst ratio)
Blue amplitude
1.50 ± 0.1 time (burst ratio)
Yellow amplitude
103° ± 2°
Red phase
343° ± 2°
Blue phase
154° ± 2°
Yellow phase
39
Adjustment method
Adjustment address
: "013A"
: "013C"
: "07DE"
: "0138"
: "0136"
: "07DD"
VL-AX1S/H/E/EW/EX
100mV/div