Samsung sf150t Service Manual page 24

6-5 Continued
B
Y
CIS LED on ?
N
Check P3-9
Y
CLED ² 1 V
N
U7-87
H
"H"
L
Replace U7
SF150T
Check P3-8
OK
CLK1: 300 kHz
NG
Replace U7
Replace CIS
Replace Q2
Check P3-6
OK
START Signal
NG
Replace U7
Troubleshooting
P3-4
Y
- 12 V ?
See Section 6-2
Replace CIS
6-9