LCD TV Monitors Acer AT2230 and AT2231 Service mode, software update, SMPS schematic, EDID data

The LCD TV will contain a main board, a power board a function keyboard and an IR board. The main board and power board will house the flat panel to control logic I2C bus, DDC, brightness control logic for LCD panel, DC-DC conversion to supply the appropriate power to the whole board and transmitting TTL level signals into LCD Module to drive the LCD display circuit.

The inverter board will drive the five CCFLs (Cold Cathode Fluorescent Lamp).
The function keyboard and Remote Control will provide the OSD control signal to the Main Board.

The high voltage was only generated by Power support part, if carelessly contacted the transformer on this module, can cause a serious shock.

D-SUB and HDMI PIN Distribution
This procedure gives you instructions for installing and using the LCD TV display.
(1) Position the display on the desired operation and plug the power cord into a convenient AC outlet. Three-wire power cord must be shielded and is provided as a safety precaution as it connects the chassis and cabinet to the electrical conduct ground. If the AC outlet in your location does not have provisions for the grounded type plug, the installer should attach the proper adapter to ensure a safe ground potential.
(2) Connect the 15-pin color display shielded signal cable to your signal system device and lock both screws on the connector to ensure firm grounding. The connector information is as follow:

Factory preset modes: analog RGB signal timing

The M220Z1-L03 model is a 22 inch wide TFT-LCD module with a 4-CCFL Backlight Unit and a 30-pin 2ch-LVDS interface. This module supports 1680 x 1050 WSXGA+ (16:10 wide screen) mode and displays up to 16.7 million colors. The inverter module for the Backlight Unit is not built in.

This monitor meets the Green monitor standards as set by the Video Electronics Standards Association (VESA) and/or the United States Environmental Protection Agency (EPA) and The Swedish Confederation Employees (NUTEK). This feature is designed to conserve electrical energy by reducing power consumption when there is no video-input signal present. When there is no video input signals this monitor, following a time-out period, will automatically switch to an OFF mode. This reduces the monitor's internal power supply consumption. After the video input signal is restored, full power is restored and the display is automatically redrawn. The appearance is similar to a "Screen Saver" feature except the display is completely off. The display is restored by pressing a key on the keyboard, or clicking the mouse.

Upgrade Firmware

Using USB port connecting PC & MST99980 Board via ISP board as below. Turn on the monitor and run ISP tool.

Click the button “Connect”, if it can identify the type of the device, please click the “Dis Con” and then click the “Connect” again.

Click the button “Read” to load the software file and then click the “Auto”.

When the picture showed as below, we can click the “run” to finish to upgrading.

How to enter the service mode [Factory mode]

To enter the factory mode menu: press “MENU+ “234” then enter FAC mode.

EDID data

Power board schematic

PC mode display adjustment

WHITE-D adjustment (B)
General set-up:
Equipment Requirements: Minolta CA-110 or Equivalent Color analyzer
Chroma 2250 or equivalent PC signal generator
Input requirements:
Input Signal Type: PC VGA signal
1024X768/60Hz PC mode with PGCWRGB pattern. (see pattern-1)
Input Signal Strength: 0.7 Vp-p linear voltage.
Input Injection Point: PC D-SUB input.

Alignment method
Initial Set-up:
1. Select source as “VGA”.
2. Set Contrast = 50 (CMO) and Brightness=50 (CMO), at Standard menu mode.
3. Apply “PGCWRGB”(pattern-1) pattern by VGA pattern generator.
4. Enter factory mode menu: press “MENU+ “234” then enter FAC mode
Alignment:
1. At FAC mode menu, select FACTORY->Picture ->ADC -> Auto Colour item. Then press “>” key 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.

White- Balance alignment
1. Select source as “HDMI1”
2. Apply Flat pattern (100% white pattern), at FAC mode menu, select Factory -> Picture -> Colour Temp item
3. Set color temperature to “Standard”.
4. Adjust the R Gain, G Gain, B Gain values to meet “Standard” color coordinates specification below. Then store those values to NVM.
5. Set color temperature to “Warm”.
6. Adjust the R Gain, G Gain, B Gain values to meet “Warm” color coordinates specification below. Then store those values to NVM.
7. Set color temperature to “Cold”.
8. Adjust the R Gain, G Gain, B Gain values to meet “Cold” color coordinates specification below. Then store those values to NVM.

Color temperature Standard/Warm/Cold (x, y) co-ordinates specification

Picture Mode	x	Y
Standard(6500oK)	0.314±0.015	0.329±0.015
Warm (5500oK)	0.332±0.015	0.341±0.015
Cold (7500oK)	0.300±0.015	0.310±0.015

Note:
1. Use Minolta CA-110 for colour coordinates and luminance check.
2. Luminance > 250 cd/m2 in the center of the screen when Brightness control at 100; Contrast control at 100
3. Reset AV setting, smart picture shall be recalled to be “Standard” and Contrast=50 (CMO), Brightness=50 (CMO)