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7 . S G H - N 7 0 7 Fl o w
1. Power On
The set is not ' Power O n '
C heck the current consum ption
C urrent consum ption
>=100m A
C heck the +V BA TT V oltage
V oltage >= 3.3V
C heck the pin of U 101
pin#J 12 of U 101 >= 2.8V
pin#A 13 of U 101 = 2.8V
C heck the clock signal
at pin#R 6
Freq = 13M H z
C heck the initial operation
C h a r t o f T r o u b l e s h o o t i n g
Y es
Y es
Y es
Y es
Y es
Y es
E N D
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N o
D ownload again
N o
C harge the Battery
N o
C heck U 101 and C 112
N o
N o
pin#G 11 = 1.8V
N o
C heck the clock generation circuit
(related to O SC 401)
7- 1
C heck U 101 and C 115
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