NORCENT LT2722 SERVICE MODE WHITE BALANCE ADJUSTMENT SCALER ADJUSTMENT AND MORE

TO ENTER SERVICE MODE [FACTORY MODE]

• Press Number key 100 à 9 à 9 à 9 will into the factory mode, and OSD will be shown in the screen.

WHITE BALANCE ADJUSTMENT

Approximately 30 minutes should be allowed for warm up before proceeding white balance adjustment.

Before started adjust white balance,

• Set 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/m2 (PC Mode); 9300 parameter is x =283, y = 297, Y> 450cd/cm2 (TV Mode))
• To set MEM.channel 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

• ADC Adjustment:

1. AL à Auto level adjust for PC mode.
2. ALY à Auto level adjust for YUV mode.
3. RG, GG, BG à R, G, B Gain adjust.
4. RB, GB, BB à R, G, B Bias adjust.

• SCALER Adjustment:

1. CO, BR à Contrast and Brightness adjust.
2. RG, GG, BG à R, G, B Gain adjust.
3. RB, GB, BB à R, G, B Bias adjust.
4. S9, S6, ST, SH à Save 9300, 6500, TV/AV /S-Video /480i, Component 480P color temperature.
5. R9, R6, RT, RH à Recall 9300, 6500, TV/AV /S-Video /480i, Component 480P color temperature.
6. CC à Set Close Caption ON/OFF.
7. VC à Set V Chip ON/OFF.
8. WH à Set Wireless Headphone ON/OFF.
9. PP à Set PIP ON/OFF.
10. BI à Setup Burn-in mode ON / OFF.
11. ISP àSet ISP ON/OFF.
12. SR PP à Set SRS ON/OFF.
13. EX à Exit MORE function to factory mode menu.

Before adjustment:

• Press Number key 100 à9 à9 à1 into Engineer Mode.
• Press menu key repeat to “ADC “page, then select “EPinit” and press “right” key to initial EEPROM.
• Press Number key 100 à 9 à 9 à 9 into the Factory Mode.

Gain adjustment:

• 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.

• Adjust 6500 color-temperature:

1. Switch the chroma-7120 to RGB-mode (with press “MODE” button)
2. Switch the MEM. Channel to Channel 02 (with up or down arrow on Chroma-7120)
3. The LCD-indicator on chroma-7120 will show x = 313, y=329, 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 “S6” and press “right” arrow to save the value.

• Adjust Video color-temperature:

1. Switch the chroma-7120 to RGB-mode (with press “MODE” button)
2. Switch the MEM. Channel to Channel 03 (with up or down arrow on Chroma-7120)
3. The LCD-indicator on chroma-7120 will show x = 283, y=297, Y>450.
4. Change source input to AV1.
5. Adjust the GG up to G value at chroma-7120 not going up; set the G value is max.
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 value the same.
8. Select cursor to “ST” and press “right” arrow to save the value.
9. Turn the POWER-button off to on to quit from factory mode.

• Auto Level of PC should be adjusted with TIMG 127, PATN 42 or 16 GRAYS screen.
• It should be under white picture while adjusting the color temperature of all display modes.