Samsung LB15VS Service Manual page 31

5 Troubleshooting
5-1-19 User Control & Power Switch Failure
Does the DC level change at
Pin 37 & 38 of IC201 when you
push the S/W button?
Yes
Check IC201.
5-1-20 Degaussing Failure
Check degaussing connector.
RL601 operation is right?
No
Q621 base input is right?
No
IC201 Pin 10 output is right?
Yes
Done
5-12
No
Check the button.
(SW201 ~ SW205)
Yes
Check D-coil and TH601.
Yes
Check and replace Q621.
No
Check and replace IC201.
LB15VS/LB17LS/LB17KS/
LB17LT/LB17KT