Samsung HPS5033X/XAC - Page 59

Troubleshooting
Samsung Electronics 6-9
No Display
[ Y-MAIN ]
Check necessary points
[ Logic Main ]
LED Blinks
[ X-MAIN ]
Check necessary points
[ Logic Main ]
Check if power is supplied
( 5V, 3.3V )
Check the LED
operation
Check if internal is
Default Black
Check the
MICOM operation
Check the
power connectivity
Check if any address
data output is detected
Check the ASIC
Control Signal output
Check if the data
and control signals
between DDR & ASIC
are normal
If the input voltage is
abnormal, replace the
PSU and check it
again as this indicates
a PSU output error
Check the FUSE
Check the
input voltage
YES NO
YES NO
[ Y-MAIN ]
Check several points
FUSE
FET/
DIODE
Y-MAIN
Normal State
Replace the Board
Replace the Board
OK
OPEN
SHORT
OK
F5001 for VDD
F5002 for Vs
F5004 for VCC
F5005 for OUT_L
Q5009~Q5021
D5005, D5007
D5008
[ X-MAIN ]
Check several points
FUSE
FET/
DIODE
X-MAIN
Normal State
Replace the Board
Replace the Board
OK
OPEN
SHORT
OK
F4001 for VCC
F4002 for Vs
F4004 for VDD
F4005 for Ve
Q4002~Q4003
Q4011~Q4016
D4004
D4006~D4008
2) Troubleshooting Procedure in Abnormal Conditions
① No Display (Operating Voltage exist, but an doesn't exist on Screen)
▶ No Display is related with Y-MAIN, X-MAIN, Logic Main and so on.
This page shows you how to check the boards, and the following pages show you how to find the defective board.