Alignments and Adjustments, Required Equipment

4 Alignments and Adjustments

This section of the service manual explains how to use the RS232 JIG.

This function is needed when AD Board Change and program memory (IC110) change.

4-1 Required Equipment

The following equipment is necessary for adjusting the monitor:

•Computer with Windows 95 R , Windows 98 R , or Windows NT R .

•RS232 JIG.

4-2 RS232 Jig Setup

1.Install Hyper Terminal program from windows system.

2.Configure Baud rate to 19200, select appropriate COM port.

3.Make the Hardware setup as per figure shown.

Power

RS232

Adapter

Board

JIG

Power

cable

Function

Serial cable

Board

Figure 4-1.

4.Establish the connection by selecting “Connect” from hyper Terminal.

5.Power on the board, now you see messages in the application window.

If no messages than check for 1, 2 and 3 again.

Message :

Date : ****. **. **.

Chip ID : b1.

Panel : Samsung 17 SXGA.

4-3 Changing Board

Before replacing the AD Board, read all Panel information data by using RS232 JIG and hyper terminal.

1.Type character `B`.

Service Menu for Gogh 17 Model.

1.Read.

2.Modify upper Back Light Value.

3.Modify Lower back Light Value.

4.Modify Panel On Time Value.

5.Exit Service Menu

Enter 1

Upper Backlight Time Expired (in hours) : ***

Lower Backlight Time Expired (in hours) : ***

Panel On Time (in hours) : ***

Please note down these values. Than change to new board. Execute the command `B`, read the values. You will see these are set to default values. Change the values to the recorded values. Exit the service menu by `B` command.

2. Color Auto Adjustment

After function `1`. Assemble the monitor.

And display 16-Gray pattern or black and white mixed pattern. Then push “Exit”, “-” and “+” key of function same time.

During normal execution of Auto Algorithm the screen image may changed.

4-4 Program memory (IC110) change

Follow same method as changing Board (4-3).

GH17LS/GH17ES

4-1