Samsung LB15VS Service Manual page 37

5 Troubleshooting
5-2-7 Poor Focus ( Only 17" Function)
Adjust focus VR of FBT.
Improved focus?
No
Check focus leads from FBT
to CRT socket.
Check CRT socket.
Dynamic focus circuit is
right?
Yes
Replace the CRT and verify
focus.
5-2-8 Purity Failure
Degause
Purity is correct?
No
Degaussing circuit is
correct?
Yes
Replace CRT and verify purity.
5-18
Yes
Align monitor and
check for focus change.
No
Refer to 5-1-15 dynamic
focus failure.
Yes
Done
No
Refer to 5-1-20 degaussing
failure.
LB15VS/LB17LS/LB17KS/
LB17LT/LB17KT