Samsung sf150t Service Manual page 23

Troubleshooting
6-5 No Copy Mode Operation
Start
Y
TPH Test O.K ?
N
Y
Check U7-55
"H"
N
Replace U7
Y
P2-7, 11, 12
N
Replace U5
6-8
Y
CIS Test O.K ?
N
B
Y
Check P1-10
"L"
N
Replace U5
Replace TPH
Y
O.K ?
N
Replace U7
Y
Is Memory Clear ?
N
Replace Main PBA
Check +24 V
Y
P1-8, 9 ?
N
See Section 6-2
Restart
Y
O.K ?
N
Replace Main PBA
Reload Document
P2-4, 6, 8, 10
Y
TPH strobe
N
Replace U7
Restart
SF150T