Norcent LT2722, Service Manual

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Norcent LT2722
26
6. White-Balance, Luminance adjustment
Approximately 30 minutes should be allowed for warm up before proceeding white balance
adjustment
.
Before started adjust white balance, please setting the Chroma-7120 MEM. Channel 1 to 9300 color, MEM.
Channel 2 to 6500 color, and MEM. Channel 3 to 9300 color, (9300 parameter is x =283, y = 297, Y =
380cd/m2 (PC Mode); 6500 parameter is x = 313, y = 329, Y = 380cd/m
2
(PC Mode); 9300 parameter is x =283,
y = 297, Y> 450cd/cm2 (TV Mode))
Color Temp. 9300(PC Mode) 6500(PC Mode) 9300(TV Mode)
X 0.283 0.313 0.283
Y 0.297 0.329 0.297
Y 380 380 >450
How to setting MEM.channel you can reference to Chroma-7120 user guide or simple use “ SC ” key and
“ NEXT ” key to modify x,y,Y value and use “ ID ” key to modify the TEXT description
Following is the procedure to do white-balance adjust
Press Number key 100 9 9 9 will into the factory mode, and OSD will be shown in the screen, then
select MORE function will into Bias and Gain adjustment.
1. ADC Adjustment:
AL Auto level adjust for PC mode.
ALY Auto level adjust for YUV mode.
RG, GG, BG R, G, B Gain adjust.
RB, GB, BB R, G, B Bias adjust.
2. SCALER Adjustment:
CO, BR Contrast and Brightness adjust.
RG, GG, BG R, G, B Gain adjust.
RB, GB, BB R, G, B Bias adjust.
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 Close 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.
ISP Set ISP ON/OFF.
SR PP Set SRS ON/OFF.
EX Exit MORE function to factory mode menu.
I. Before adjustment:
1. Press Number key 100 9 9 1 into Engineer Mode .
2. Press menu key repeat to “ADC “page, then select “EPinit” and press “right” key to initial EEPROM.
3. Press Number key 100
9 9 9 into the Factory Mode.
II. Gain adjustment:
A. Adjust 9300 color-temperature:
1. Switch the chroma-7120 to RGB- mode (with press “MODE” button)
2. Switch the MEM. Channel to Channel 01 (with up or down 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 up to G value at chroma-7120 is 100.
7. Adjust the BG and RG till the value of R and B value on Chroma-7120 are 100±5.
8. Repeat the item 4 and 5 to make the R, G, B value are the same.
9. Select cursor to “S9” and press “right” arrow to save the value.