LG KG920 - Page 103

4. TROUBLE SHOOTING
- 104 -
CHECKING FLOW
Figure 4-51.
Folder on/off will
work properly
Is there the magnet
in the KEY ASSíY?
START
Replace U100
Place the magnet properly.
NO
YES
Voltage at pin 3
of U305 = 2.8V ?
YES
NO
Voltage of VEXT at U100
= 2.8V?
NO
Resolder U305
YES
YES
Does it work properly?
YES
Change Main board
NO
Voltage at pin 3
of U306 = GND ?
YES
NO
Replace U306
Replace U100
Swivel,
Voltage at pin 3
of U306 = 2.8V ?
YES
NO
Voltage of VEXT at U100
= 2.8V?
NO
Resolder U306
YES
Voltage at pin 3
of U305 = GND ?
NO
Replace U305