5. Trouble shooting
- 91 -
5.9 Keypad back light trouble
Check Points
- Signal path is connected well
- Analog SW is working properly
VA105
EVL5M02200
VBAT
120
R101
LD102
R102
120
LED_R
LD101
PRECHARGING & KEY BACKLIGHT LED
3
A
B0
4
B1
6
GND
5
1
S
2
VCC
U107
FSA4157L6X
2SC5585
2
3
1
Q101
R127
4.7K
VCHG
R128
100K
R123
0
R124
1.5K
R120
100K
10
R119
0.1u
C130
R121
10K
2V85_IO
VBAT
KEYBACKLIGHT
LED_R
Summary of Contents for Prada KE850
Page 1: ...Date March 2007 Issue 1 0 Service Manual Model KE850 Service Manual KE850 ...
Page 3: ... 4 ...
Page 5: ... 6 ...
Page 71: ...4 PCB layout 72 Main PCB bottom Main PCB bottom placement ...
Page 115: ... 116 6 Download S W upgrade 6 Press the START button ...
Page 117: ...6 Download S W upgrade 118 KE850 KE850P40 7 V09a KE850 KE850P40 7 V09a ...
Page 127: ... 128 LGMC 8 pcb layout ...
Page 128: ... 129 LGMC 8 pcb layout ...
Page 129: ... 130 LGMC 8 pcb layout ...
Page 130: ... 131 LGMC 8 pcb layout ...
Page 131: ... 132 8 pcb layout ...
Page 132: ... 133 8 pcb layout ...
Page 133: ... 134 8 pcb layout ...
Page 134: ... 135 8 pcb layout ...
Page 135: ... 136 8 pcb layout ...
Page 136: ... 137 8 pcb layout ...
Page 137: ... 138 ...
Page 149: ... 150 ...
Page 151: ... 152 ...
Page 172: ...Note ...
Page 173: ...Note ...