Samsung DSR9500EMVIA - Manual (Page 33)

Troubleshooting
4-2 Samsung Electronics
NO LOCKING
X1001, DC voltage is
H : 17~19V
V : 12.5~14V?
T1001 input voltage
R2003, L1002 : 5V
R2001 : 3.3V
Check U100.
Check U1004.
Yes
Yes
No
No
Check U72, U71.
T1001 Data, control
oddure at R2002~R2004,
R2006~R2013, R1015.
Yes
No
Check T1001.
U500(40~50, 53~63)
Data control signal
is OK?
No
Check U500.
Yes