Asus M930 Service Manual download pdf (Page 14)

GTC Service Manual

ASUS Proprietary 14

華

碩

電

腦

4.3

.3 .3

.3 Display Test

Display TestDisplay Test

Display Test

The test item will focus LCM interface and backlight. If result is fail

please check below item.

A. VIO_LCD 1.8V,

R143 both side.

B. LCD_VSYNC

LCD_HSYNC

LCD_PCLK video clock,

C238Pin1、C239Pin1、R111 both side on soldering issue.

C. If the main screen backlight wasn’t executed, we can check below

items on the LCD_PCB auxiliary board.

(LED_V+) 12.1V

MAIN_BL_EN 1.8V

If something wrong with the result which we found, please check U1

peripheral components and circuit.

D. If the secondary screen backlight wasn’t executed, we can check

below items on the LCD_PCB auxiliary board.

LED_V+ 6.2V

SUB_BL_EN 1.8V

If something wrong with the result which we found, please check U1

peripheral components and circuit.

Figure 7. Backlight Driver Circuit ( On LCD_PCB board)

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Asus M930 Service Manual Page 14