Service manual

41
VL-WD250U
VL-WD450U
Item
Adjustment method
(1) White balance adjustment is performed repeatedly.
(7) White balance adjustment
• Measurement terminal:
EE output
• Address:
"0090" INDOOR_W/B R
"0092" INDOOR_W/B R
• Measuring instrument:
Vector scope
• Object:
Grey scale
• Data variation width:
"0000" to "03FF"
(1) Color gain adjustment is performed repeatedly.
Adjustment address
Red amplitude 1.65 ± 0.05 time (burst ratio) : "0338"
Blue amplitude 1.25 ± 0.05 time (burst ratio) : "033A"
Red phase 105° ± 2° : "0335"
Blue phase 339° ± 2° : "0333"
(9) Auto white balance adjustment
• Measurement terminal:
EE output
• Address:
"0016" OUTDOOR R
"0018" OURDOOR B
• Measuring instrument:
Vector scope
• Object:
Grey scale
• Data variation width:
"0000" to "03FF"
(1) The color temperature conversion filter (LB165) is mounted in front of lens.
(2) Indication of vector scope is observed in the grey scale standard record state, and
an adjustment is made so that the luminous dots are located in the following
positions:
R-Y 0 ± 3% (burst ratio)
B-Y 0 ± 3% (burst ratio)
(8) Color gain adjustment
• Measurement terminal:
EE output
• Address:
"0338" CGIN RYG
"033A" CGIN BYG
"0335" CMAT RYG
"0333" CMAT BYG
• Measuring instrument:
Vector scope
• Object:
Waveform monitor color bar chart
• Data variation width:
"0000" to "00FF"
(1) Set the unit to the normal operation mode (write the data " FF" to the address
"0000").
(2) 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 735 ± 10mVp-p.
(10) Iris AE 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"
100mV/div