Samsung SGH-E330 Service Manual page 21

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7 . S G H - E3 3 0 Fl o w

1. Power On

' Power O n ' does not work

C heck the B attery V oltage

is m ore than 3.4V

C 414(V _ISU P) = 2.7V ?

C heck the C lock at

R 401=32K H Z

C 431 (V D D 1) = " H " ?

C 430(V D D 2) &C 429(V D D 3)

= 2.8V ?

C heck for the clock at C 126

= 13M H z

C heck the initial operation

E N D

C h a r t o f T r o u b l e s h o o t i n g

Y es

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N o

C hange the B attery

N o

C heck the PM U related to V _ISU P

N o

R esolder X 400

N o

C heck the V D D 1 circuit

N o

C heck the V D D 2,V D D 3 circuit

N o

C heck the clock generation circuit

(related to U 100)

7- 1

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