![background image](http://html.mh-extra.com/html/samsung/sth-a225/sth-a225_service-manual_1189516004.webp)
SAMSUNG Proprietary-Contents may change without notice
1-2
STH-A225 Trouble Shooting
1-2. Abnormal LCD display ,EL Baob Light, Vibrator & Speaker Operation
Y
LCD module
Good
N
Replace LCD module
Y
Speaker Output OK?
N
Need to check
CN101 & neighbor part
N
Need to check
CN101
START
Y
Y
LCD Control
Signal OK?
Y
Y
EL_EN=H
N
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
CN101
Y
Y
VIBRATOR=H
N
Replace LCD module
Y
Vibrator Run
OK?
LCD Display Running
EL Back lingt Running
Send Command Vibrator
enable(Test mode:180)
N
Need to check CN101
& neighbor part
Y
SPK+,SPK-
Signal OK?
LCD EL Vibrator OK Send Command
Main Audio Receiver Path ON
(Test mode:031, 131, 134, 185)
Need to check U106 out pin5
2.8 V al control pin3 ‘H’