4. TROUBLE SHOOTING
- 72 -
START
Check Battery Voltage
> 3.35V ?
Push power-on key
And check the level change
of PWRKEY
Check the voltage of
The LDO outputs at U101
Logic level at KEYON of U101
= HIGH
Does it work properly?
THE PHONE WILL
POWER ON.
Charge or Change Battery
Check the contact of power key
Or dome-switch
Replace U101
VCORE=1.8V VVCXO=2.75V
VMEM=2.8V VRTC=1.8V
VEXT=2.8V VSIM=2.85V (when sim card is inserted)
VABB=2.75V VMIC=2.5V
Re-download software
The power-on procedure is
Completed. The problem may
be elsewhere.
Does it work properly?
Replace the main board
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
Checking Flow
Summary of Contents for M6100
Page 1: ...Date February 2006 Issue 1 0 Service Manual Model M6100 Service Manual M6100 ...
Page 3: ... 4 ...
Page 15: ...3 TECHNICAL BRIEF 16 Figure 3 1 SKY74400 FUNCTIONAL BLOCK DIAGRAM ...
Page 40: ...3 TECHNICAL BRIEF 41 3 7 CAMERA IC AIT813 U701 Figure 3 18 AIT813 APPLICATION BLOCKDIAGRAM ...
Page 42: ...3 TECHNICAL BRIEF 43 3 8 MIDI IC YMU787 U708 Figure 3 20 YMU787 BLOCKDIAGRAM ...
Page 63: ...4 2 TX Trouble 4 TROUBLE SHOOTING 64 SKY74400 FEM 13Mhz OSCILLATOR TEST POINT Figure 4 2 ...
Page 98: ...4 TROUBLE SHOOTING 99 4 16 Camera and Flash Trouble Camera Module CN802 U704 U705 Figure 4 17 ...
Page 109: ... 110 ...
Page 119: ... 120 8 PCB LAYOUT ...
Page 120: ... 121 8 PCB LAYOUT ...
Page 121: ... 122 8 PCB LAYOUT ...
Page 122: ... 123 8 PCB LAYOUT ...
Page 123: ... 124 ...
Page 131: ...10 STAND ALONE TEST 132 Figure 10 2 HW test setting Figure 10 3 Ramping profile ...
Page 137: ... 138 ...
Page 159: ...Note ...
Page 160: ...Note ...