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