Saturday, July 07, 2012

AOC-NORCENT - LT2722 - ENTER SERVICE MODE AND ADJUSTMENTS



ENTERING SERVICE MODE
  • To enter service mode, press key [100 => 9 => 9 => 9].  Factory mode window will be displayed.
  1. ADC Adjustment.
  • AL => Auto Level adjustment for PC mode.
  • ALY => Auto Level adjustment for YUV mode.
  • RG,GG,BG => R,G,B Gain adjustments.
  • RB,GB,BB => R,G,B Bias adjustments.
2.  SCALER Adjustment.
  • CO,BR => Contrast and Brightness adjustments.
  • RG,GG,BG => R,G,B Gain adjustments.
  • RB,GB,BB => R,G,B Bias adjustments.
  • S9,S6,ST,SH => Save 9300,6500, TV/AV, S -VIDEO/480i, Component 480P color temperature.
  • R9,R6,RT,RH => Recall 9300,6500, TV/AV, S-VIDEO/480i , Component 480P color temperature.
  • CC => set Closed Caption ON/OFF.
  • VC => Set V-Chip ON/OFF.
  • WH => Set Wireless Headphone ON/OFF.
  • PP => Set PIP On/OFF.
  • BI => Setup Burn-In Mode ON/OFF.
  • SR PP => Set SRS ON/OFF.
  • EX => Exit More Function to Factory Menu.
Before Adjustment.
  1. Press number key [100=>9=>9=>9=1] into Engineer Mode.
  2. Press Menu key repeat to ADC page, and then select "EPinit" and press Right Key to Initial EEPROM.
  3. Press key [100=>9=>9=>9] into the Factory mode.
Gain Adjustment

A -Adjust 9300 color-temperature.
  1. Switch the chroma-7120 to RGB mode, with pressing Mode button.
  2. Switch the MEM.  Channel to [01], with Up/Dn arrow on chroma-7120.
  3. The LCD indicator on chroma-7120 will show [x=283, y=297, Y>380].
  4. Change Source Input to PC.
  5. Select 'AL" and press Right arrow to do the auto-level.
  6. Adjust the GG upto G value at chroma 7120 is 100.
  7. Adjust BG and RG till the value of 'R' and 'B' value on chroma-7120 are 100+/- (5).
  8. Repeat items 4 and 5 to make R,G,B value are the same.
  9. Select Cursor to "S9" and press "right arrow"to save the value.
B -Adjust 6500 color temperature.
  • Do the same as above; with selecting MEM channel to [02].
  • Select cursor to "S6" and press "right arrow" to save the value.
C - Adjust Video Color Temperature.
  1. Switch the Chroma-7120 to RGB mode, by pressing Mode button.
  2. Switch the MEM.  Channel to Channel [03], with UP/Dn arrow on chroma.
  3. The LCD indicator on chroma-7120 will show [x=283, y=297, Y>450].
  4. Change source input to AV-1.
  5. Adjust the GG upto G value at chroma-7120 not going up; set the G value is maximum.
  6. Adjust the BG and RG till the value of R and B value on chroma-7120 same as G value.
  7. Repeat the item 4 and 5 to make the R,G,B values are the same. 
  8. Select cursor to "ST" and press "Right arrow" to save the value.
Turn the Power Button to 'OFF" to "Quit" from Factory mode.
Auto Level to PC should be adjusted with TIMG 127, PATN 42 or 16 GRAYS screen.  It should be under white picture while adjusting the color temperature o all display modes.

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