Samsung SGH-Z140 Service Manual page 28

Flow Chart of Troubleshooting
RESET_N
SLCD_RESET
R307
W_DOG
R308
MODE1
R309
TCXO_OUT
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VREG_MSMP_2.6V
VPD
R302 R303
TP301
W_DOG
MODE0
MODE1
MODE2
7-4