Service manual

3. DIAGNOSTIC CHECK
3.22 Service Manual BSM-4100
GRAPHIC DRAW Check
This item checks the function of the graphic draw plane. Check the figure of
display and colors. At the same time, it checks for defects of LCD pixels all over
the screen.
The plane for wave/graphic screen is in 20 screens and the check program displays
4 planes at a time.
If the screen has a wrong display, the MAIN board or LCD unit will be faulty.
Procedure to Execute the GRAPHIC DRAW Check Program
1. To select the Check, touch the “GRAPHIC DRAW CHECK” key.
Touch the “PLANE 0 - PLANE 3” to “PLANE 16 - PLANE 19” key to display
the plane combination.
2. When the program starts, it draws the grid line first. If you touch the screen,
the pattern changes to the triangular waveform.
After touching the screen again, the pattern on the screen is displayed all over
the screen. The patterns are changed every time the screen is touched.
3. By rotating the upper function dial, the displaying plane(s) change, such as 0,
1, 2, 3 or ALL (the number depends on the plane combination).
To select the waveform to be modified, rotate the lower function dial.
The displayed color can be changed by pressing the SILENCE ALARMS key.
4. At the triangular waveform display mode, you can scroll the waveform by
pressing the MENU key.
Press the RECORD key to change the amplitude of each waveform.
5. To return to the GRAPHIC DRAW CHECK screen, press the HOME key.
6. To return to the MANUAL CHECK MENU screen, touch the “RETURN” key.