Xerox Phaser 6121MFP Service Manual page 184

Error Messages and Codes
3-78
Troubleshooting Procedure Table
Step Action and Questions
1 Check the Engine Control Board
connectors P/J18 and P/J19.
Are the connectors seated properly?
2 On the Engine Control Board, check:
P/J19-1 for +24V
P/J18-10 and -11 for +5V
Are the voltages present?
3 On the Engine Control Board, check
P/J2-2 for +5 V. Check P/J2-1, -5, and -7
for +24V.
Are the voltages present?
4 Replace the Laser Unit.
Does the problem persist?
5 Replace the Engine Control Board.
Yes No
Go to step 2. Reseat the
connectors. If
the problem
persists, go to
step 2.
Go to step 4. Go to step 3.
Go to step 4. Replace the
Power Supply
(page 8-72). If
the problem
persists, go to
step 4.
Go to step 3. Complete.
Complete.
Phaser 6121MFP Service Manual