10. Flow Chart of Troubleshooting
10-1
10-1 BASEBAND
10-1-1. Power ON
'Power On' does not work
Yes
Check the current
consumption more
than 100mA
Download again
No
Yes
Charge the Battery
Check the VBAT
more than 3.3V
No
Yes
①
Check the
VLDO7_1.8V
of U300 is more than
1.8V
Check
U300
and
C312
No
Yes
Check
U305
②
Check
U305
pin 6, 8 = 1.5V
pin 2 = 1.8V
pin 9 = 1.6V
No
③
Yes
Check VRF of
U300=2.8V
Check
U300
and
C313
No
Yes
④
Check C168
Freq = 13MHz
Vp-p > 0.8V
Check the clock
C168
No
Yes
Check the initial operation
Yes
END