4. TROUBLE SHOOTING
- 67 -
Redow nload sof tware & try again.
Repl ace the m ain board.
Does it work properly?
The power- on procedure is com plet ed.
The pro blem may be elsewher e.
START
Check
Battery Voltage > 3.35
Charge or C hange B attery and t ry again.
Check the contact of power-key or d ome swi tch.
Check the voltage of
the following port at U102
VOORE=1.8V ?
VMEM = 1.8 or 2.8V ?
VEXT=2.8V ?
VRTC=1.8V ?
VSIM=2.85V ?
VMIC=2.5V ?
VVCXO=2.75V ?
Repl ace U102
Push power-on key and check
the level change of U102 KEYON
Logic level at KEYON of U102
= HIGH?
Does it work properly?
THE PHONE WILL
POWER ON
No
No
No
No
No
No
YES
YES
YES
YE
S
YES
YES
YES
Checking Flow
Summary of Contents for C1150
Page 1: ...Service Manual Model C1150 Service Manual C1150 Date October 2005 Issue 1 0 ...
Page 3: ......
Page 99: ...Note 100 ...
Page 104: ... 105 8 PCB LAYOUT 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: ... 120 Note ...
Page 135: ...Note 136 ...