4. TROUBLE SHOOTING
- 64 -
START
Does the SIM cards
supports 3V ?
NO
Change the SIM Card. Our phone
supports only 3V SIM card.
YES
Voltage at pin1 of
J100 is 2.85V?
NO
Resolder J100
YES
YES
Replace J100
YES
Voltage output
of VSIM LDO
Is 2.85V?
Change the SIM Card
And try again.
Does it work
Properly?
YES
Change SIM Card
Redownload SW.
Does it work
Properly?
NO
Change the main board
NO
YES
SIM Card will be detected.
Checking Flow
Summary of Contents for KG225
Page 1: ...Date April 2006 Issue 1 0 Service Manual Model KG225 Service Manual KG225 M O B ILE CAM E R A ...
Page 3: ... 4 ...
Page 19: ...3 TECHNICAL BRIEF 20 Figure 3 4 SYSTEM INTERCONECTION OF AD6720 EXTERNAL INTERFACE ...
Page 66: ...4 TROUBLE SHOOTING 67 4 12 KEY backlight Trouble Q300 R359 TEST POINT Figure 21 ...
Page 79: ... 80 5 DOWNLOAD B Multi Download Procedure 1 Run GSM Multi Download program and select Setting ...
Page 84: ... 85 6 BLOCK DIAGRAM 6 BLOCK DIAGRAM ...
Page 85: ... 86 ...
Page 92: ... 93 KG225 8 PCB LAYOUT ...
Page 93: ... 94 KG225 8 PCB LAYOUT ...
Page 101: ... 102 10 STAND ALONE TEST Figure 10 2 HW test setting Figure 10 3 Ramping profile ...
Page 109: ... 110 ...
Page 125: ...Note ...
Page 126: ...Note ...