4. TROUBLE SHOOTING
- 88 -
Folder on/off will
work properly
Is there the magnet
in the folder side?
START
Replace U102
Place the magnet properly.
NO
YES
Voltage at pin 1(VDD)
of U403 = 2.8V?
YES
NO
Voltage of VEXT at U102
= 2.8V?
NO
Resolder U403
YES
Open folder.
Voltage at pin 2(OUT) of
Resolder R418 and U403
NO
YES
Close folder.
Voltage at pin
YES
Replace U403
NO
Does it work properly?
YES
Change Main board
NO
U403 = 2.8V
2(OUT) of
U403 = 0V
Checking Flow
Summary of Contents for C2100
Page 1: ...Service Manual Model C2100 Service Manual C2100 P N MMBD0048201 Date April 2005 Issue 1 0 ...
Page 76: ...4 TROUBLE SHOOTING 77 4 10 KEY backlight Trouble Test Points Figure 4 21 ...
Page 104: ... 105 8 PCB LAYOUT ...
Page 105: ... 106 8 PCB LAYOUT ...
Page 113: ...10 STAND ALONE TEST 114 Figure 10 2 HW test setting Figure 10 3 Ramping profile ...
Page 117: ...Note 118 ...
Page 119: ......
Page 135: ......