Sharp LC-26SH330, Service Manual

Page: 38 / 223

LC-26SH330, LC-32SH330, LC-42SH330
38
2. Display adjustment
YPbPr Mode display adjustment
1) Auto color for signal slicering
General set-up :
Equipment Requirements: Minolta CA-110 or Equivalent Color analyzer, Quantum Data Pattern Generator 802G , 802BT or equivalent instrument
Input requirements:
Input Signal Type: YPbPr signal
1>. 1080i/25mode, TVBar100 pattern by 802G or 802BT.
2>. Select Picture mode to User mode and check the x, y data.
Input Signal Strength : 1 Vpp for Y signal ; 700 mVpp for Pb & Pr signal
Input Injection Point : YPbPr (RAC jack)
1080i/25, TVBar100 pattern
Alignment method:
Initial Set-up:
1>. Select source as “YPbPr”.
2>. Set Smart Picture mode as “Personal” and then adjust Contrast = 58, Brightness=48, Color=58, set Color Temp. to be “cool” mode.
3>. Apply “TVBar100” pattern which is color bar pattern by signal generator.
4>. Enter “factory mode menu”: press MENU + Numeric keys “1999”
Alignment:
1>. At factory mode menu, select AUTO_COLOR item. Then press “OK” key of remote control to adjust ADC_GAIN_R, ADC_GAIN_G,
ADC_GAIN_B and ADC_OFFSET_R, ADC_OFFSET_G, ADC_OFFSET_B. Then store those values to NVM.
2>. Check the 16 grayscale pattern should be distinguished and color bar is correct
3>. Reset AV setting, picture mode shall be recalled to be “Vivid” and Contrast=58, Brightness=48; Color=58.
2) White balance adjustment
Alignment method:
Initial Set-up:
1>. Select source as “YPbPr”.
2>. Set Contrast = 58 and Brightness=48, Color=58, at normal menu mode.
3>. Apply “80% white pattern or Flat 80 pattern” by Component video generator.
4>. Enter factory mode menu: press MENU + Numeric keys 1999.
Alignment:
1>. Apply Flat80 pattern (80% white pattern).
2>. Set color temperature to “NORMAL”.
3>. At factory mode menu, adjust the CLR TEMP R, CLR TEMP G, CLR TEMP B values to meet “NORMAL” color coordinates specification below.