AOC E960SWN – How to enter service mode – White balance adjustment – power, inverter and audio schematic - 18.5 inch LCD Color Monitor

SMPS, Back-Light inverter and audio output circuit diagram – W/B adjustment – Service mode (Factory Mode) – AOC E960SWN 18.5" LCD Color Monitor.  Used ICs: APA2603JI-TUG – OZ9998BGN – LD7576GR – P0765ATF(FET)

Panel Specification
LM185WH2-T2BB is a Color Active Matrix Liquid Crystal Display with an integral Light Emitting Diode (LED) backlight system. The matrix employs a-Si Thin Film Transistor as the active element. It is a transmissive type display operating in the normally white mode. It has a 18.5 inch diagonally measured active display area with HD resolution (768 vertical by 1366 horizontal pixel array) Each pixel is divided into Red, Green and Blue sub-pixels or dots which are arranged in vertical stripes. Gray scale or the brightness of the sub-pixel color is determined with a 8-bit gray scale signal for each dot, thus, presenting a palette of more than 16,7M colors with Advanced-FRC (Frame Rate Control). It has been designed to apply the interface method that enables low power, high speed, low EMI.  FPD Link or compatible must be used as a LVDS (Low Voltage Differential Signaling) chip. It is intended to support applications where thin thickness, wide viewing angle, low power are critical factors and graphic displays are important. In combination with the vertical arrangement of the sub-pixels, the LM185WH2-T2BB characteristics provide an excellent flat panel display for office automation products such as monitors.

Enter into the factory mode
* Turn off the power, press two direction keys and turn the power on.  * Then press the “MENU” button. The factory OSD will appear.

** Turn the Power-button off to quit (Exit) from factory mode.

Schematics [Click on the schematics to zoom in]

715G4033P01000004I - Power [SMPS] Board

715G4497 – Inverter board

715G4497-POB-0000-0010 – Audio board

White- Balance, Luminance Adjustment

Approximately 30 minutes should be allowed for warm up before proceeding white balance adjustment.
How to setting MEM channel: Simply use “SC” key and “NEXT” Key to modify xyY value and use “ID” key to modify the TEXT description Following is the procedure to do white-balance adjust .
2. Setting the color temp. you want
A. MEM.CHANNEL 3 Warm (6500K):  Warm color temp. parameter is x = 313 ±30, y = 329 ±30
B. MEM.CHANNEL 4 Normal (7300K):  Normal color temp. parameter is x = 301 ±30, y = 317 ±30
C. MEM.CHANNEL 9 Cool (9300K):  Cool color temp. parameter is x = 283 ±30, y = 297 ±30
D. MEM.CHANNEL 10 (sRGB color):  sRGB color temp. parameter is x = 313 ±30, y = 329 ±30

3. Enter into the factory mode
Turn off the power, press two direction keys and turn the power on. Then press the “MENU” button. The factory OSD will appear.
4. Gain adjustment:
Move cursor to “-F-” and press MENU key
A. Adjust Warm (6500K) color-temperature
1. Switch the chroma-7120 to RGB-Mode (with press “MODE” button)
2. Switch the MEM.channel to Channel 3 (with up or down arrow on chroma 7120)
3. The LCD-indicator on chroma 7120 will show x = 313 ±30, y = 329 ±30
4. Adjust the RED on factory window until chroma 7120 indicator reached the value R=100
5. Adjust the GREEN on factory window until chroma 7120 indicator reachedthe value G=100
6. Adjust the BLUE on factory window until chroma 7120 indicator reached the value B=100
7. Repeat above procedure (item 4, 5, 6) until chroma 7120 RGB value meet the tolerance =100±2

B. Adjust Normal (7300K) color-temperature
1. Switch the chroma-7120 to RGB-Mode (with press “MODE” button)
2. Switch the MEM.channel to Channel 4 (with up or down arrow on chroma 7120)
3. The LCD-indicator on chroma 7120 will show x = 301 ±30, y = 317 ±30
4. Adjust the RED on factory window until chroma 7120 indicator reached the value R=100
5. Adjust the GREEN on factory window until chroma 7120 indicator reachedthe value G=100
6. Adjust the BLUE on factory window until chroma 7120 indicator reached the value B=100
7. Repeat above procedure (item 4, 5, 6) until chroma 7120 RGB value meet the tolerance =100±2

C. Adjust Cool (9300K) color-temperature
1. Switch the Chroma-7120 to RGB-Mode (with press “MODE” button)
2. Switch the MEM. Channel to Channel 9 (with up or down arrow on chroma 7120)
3. The LCD-indicator on chroma 7120 will show x = 283 ±30, y = 297 ±30
4. Adjust the RED on factory window until chroma 7120 indicator reached the value R=100
5. Adjust the GREEN on factory window until chroma 7120 indicator reached the value G=100
6. Adjust the BLUE on factory window until chroma 7120 indicator reached the value B=100
7. Repeat above procedure (item 4, 5, 6) until chroma 7120 RGB value meet the tolerance =100±2
D. Adjust sRGB color-temperature
1. Switch the chroma-7120 to RGB-Mode (with press “MODE” button)
2. Switch the MEM.channel to Channel 10 (with up or down arrow on chroma 7120)
3. The LCD-indicator on chroma 7120 will show x = 313 ±30, y = 329 ±30
4. Adjust the RED on factory window until chroma 7120 indicator reached the value R=100
5. Adjust the GREEN on factory window until chroma 7120 indicator reachedthe value G=100
6. Adjust the BLUE on factory window until chroma 7120 indicator reached the value B=100
7. Repeat above procedure (item 4, 5, 6) until chroma 7120 RGB value meet the tolerance =100±2
E. Turn the Power-button off to quit from factory mode