4. TROUBLE SHOOTING
- 95 -
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
of U403 = 2.8V?
YES
NO
Voltage of VEXT at U102
= 2.8V?
NO
Re-solder U403
YES
Open folder.
Voltage at pin 1 of U403
=2.8V
Re-solder R401 and U403
NO
YES
Close folder.
Voltage at pin 1 of U403
= 0V
YES
Replace U403
NO
Does it work properly?
YES
Change Main board
NO
Checking Flow
Содержание C3380
Страница 1: ...Service Manual Model C3380 Date November 2005 Issue 1 0 Service Manual C3380 ...
Страница 3: ... 4 ...
Страница 83: ...4 TROUBLE SHOOTING 84 4 11 KEY backlight Trouble Test Points Figure 4 22 ...
Страница 98: ...4 TROUBLE SHOOTING 99 Yes No Yes No Replace M201 Establish a call Replace U101 Software Re_download ...
Страница 109: ...Note 110 ...
Страница 116: ... 117 8 PCB LAYOUT ...
Страница 117: ... 118 8 PCB LAYOUT ...
Страница 125: ...10 STAND ALONE TEST 126 Figure 10 2 HW test setting Figure 10 3 Ramping profile ...
Страница 129: ... 130 ...
Страница 131: ... 132 ...