Samsung LB15VS Service Manual page 28

5-1-16 No Video
Check signal cable and
connection.
IC101 Pin 5, 6 and 7
15
inputs are right?
Yes
IC101 Pin 19, 20 and 21
16
outputs are right?
Yes
IC103 Pin 2, 4 and 6
17
inputs are right?
Yes
Cathode DC levels are
right?
Yes
G2 voltage is right?
Yes
Change CRT.
Done
LB15VS/LB17LS/LB17KS/
LB17LT/LB17KT
No
Check the signal cable
connection.
No
Check I 2 C bus and +12V line.
No
Check +12V, +80V line.
Check and replace IC103.
No
Check +80V line.
Check and replace IC103.
No
Check G2 wire,
CRT socket board and FBT.
5 Troubleshooting
WAVEFORMS
15
1.00V (IC101 #5,6,7)
16
1.00V (IC101 #19,20,21)
17
20.0V (IC103, #2,4,6)
5-9