Slide Lcd Backlight Led Trouble Shooting - LG GD330 Service Manual
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4. TROUBLE SHOOTING
4.19. Slide LCD Backlight LED Trouble Shooting
Slide LCD backlight LED Operation scheme is shown below.
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Slide LCD Backlight operation
- Slide backlight LED is controlled with MLED_C1~5 and Navi_LED_1 signals
- Main Flexible FPCB
- LCD_BL_CTRL signals from DBB(U101)
- The LEDs are forward biased and turned on
Check Point
- VBAT level ( 3.35 ~4.2V)
– Main FPCB
- LEDs
- Charge pump
LGE Internal Use Only
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Copyright © 2009 LG Electronics. Inc. All right reserved.
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Only for training and service purposes
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Table of Contents
Troubleshooting
