GX20
2 – 74
CONFIDENTIAL
3. Display Test
Serial Signal Format for Main Display Test
* For VCOM adjustment (flicker adjustment), refer to "the Adjustment Procedures for Replacement of Parts".
Serial Signal Format for External Display Test
* For contrast adjustment of the external display, refer to "the Adjustment procedures after replacement of parts" on pages 2-36 to 2-38.
Item
Incoming Serial Signal
Outgoing Serial Signal
Contents
Test Method
Command
n
Response
Checking
main display
LCDDISP
3
2
1
0
LCDDISPn
VCOM adjustment pattern.
Color gradation.
Black display.
White display.
Checking for the main display.
LCDDISP3: VCOM adjustment
pattern.
LCDDISP2: Color gradation dis-
play.
LCDDISP1: All black display.
LCDDISP0: All white display.
Gradation
display
SGRA
1
0
OK
VCOM adjustment pattern dis-
played on the main display.
White display.
8-gradation pattern displayed.
Send the signal for flicker adjust-
ment.
Item
Incoming Serial Signal
Outgoing Serial Signal
Contents
Test Method
Command
n
Response
Checking the
rear liquid
crystal display
SUBLCD
1
0
OK
RGB display: Vertical tripartition
(RGB from the left).
RGB display: Horizontal tripartition
(RGB from the top).
* 256-color mode display.
Checking RGB display available.
