Keypad Blacklight Leds Trouble - LG C3600 Service Manual

4. TROUBLE SHOOTING

4.9 KEYPAD Blacklight LEDS Trouble

Figure 4-16
NO
Enter into engineering
Replace LEDs YES
Blacklight will
All keypad backlight
start
mode and open backlight
not working work properly ?
LEDs are working?
NO
YES
YES
NO
NO Voltage at Pin3,6 of Voltage at pin5 of
Change
replace Q301
end
mainboard
Q301 =0.3V? Q301 =0.9V?
NO
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