5. Trouble shooting
- 78 -
START
"PWRON" signal
= VBAT?
"_RESET" signal
goes to high?
Check the all
LDO's output
Is it correct?
Is the 26MHz
clock From U402
signal correct?
Replace main PCB
Check the
RPWRON,
replace U204
Check solder
U206 or replace it
Check solder
U201 or replace it
Check solder
X401, U403
or replace it
Yes
Yes
Yes
Yes
Yes
No
No
No
No
Connect power
supply to the DUT
Vbat = over 3.35V
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 ...