Samsung MAX-800

6-1-4 V.F.D Malfunction
Yes
Connector inserted
correctly?
No
Yes
Check voltage : AC 3.6V
at FRONT-PCB FLT?
No
Check Main-PCB Front PCB
connection and the voltage of
MCW2, pins1,2(AC 3.6V)
Yes
Check voltage at UIC1
pin no. 48(-30V)
No
Check the voltage of RR7(-30V)
Reinsert the connector.
Replace UIC1
6-4 Samsung Electronics
Troubleshooting