Samsung SGH-X600 Service Manual page 23

SG H- X 600 F low Chart of T roubleshooting
1. Power On
' Power O n ' does not work
C heck the Battery V oltage
is m ore than 3.4V
C 416(V _ISU P) = 2.7V ?
C heck the C lock at
R 401=32kH z
C 440 (V D D 1) = " H " ?
C 439(V D D 2) &C 438(V D D 3)
= 2.8V ?
C heck for the clock at
R 141= 13M H z
C heck the initial operation
E N D
Y es
Y es
Y es
Y es
Y es
Y es
Y es
Y es
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N o
C hange the Battery
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 O SC 101)
7- 1