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2-2
STH-N271
Trouble Shooting
N
Need to check
U103 & neighbor part
N
Need to check
R126, C148
1-2. Abnormal LCD display ,EL Back Light, Vibrator & Speaker Operation
START
Y
Y
LCD Control
Signal OK?
Y
Y
EL_EN=H
N
Need to check U104
& neighbor Part
Y
EL Back light
OK?
VCC, ADD(2), DATA(0:7),
DISPLAY_CS, RST
LCD Display Running
Send Command EL
enable(Test mode:176)
N
Need to check
R216, U205, D202
Y
Y
VIBRATOR=H
N
Need to check CN202
Y
Vibrator Run
OK?
LCD Display Running
EL Back lingt Running
Send Command Vibrator
enable(Test mode:180)
N
Need to check SPK101
& neighbor part
Y
Y
REC20+,- Signal
OK?
LCD EL Vibrator OK Send Command
Main Audio Receiver Path ON
(Test mode:031, 131, 134, 185)
Good