Oki LP-1040 Maintenance Manual page 215

(b) Problem analysis at improper display on drawer for roll 1 open/close status
◇
If PS21 is switched On and everything is operating as it should, its initial action
is executed. Be careful not to touch it during this time.
 Check PS21.
 Check for a problem with PS21's signal contact or with PS21 itself.
 Check CBL-RFU11 and CBL-RFU12 connectors for a disconnection or a faulty connection.
If there are no problems, replace the PCB-ASSY-ARC (RIP board) or the PCB-ASSY-AAC
(actuator control board).
(c) Problem analysis at improper display on drawer for roll 2 open/close status
◇
If PS22 is switched On and everything is operating as it should, its initial action
is executed. Be careful not to touch it during this time.
 Check PS22.
 Check for a problem with PS22's signal contact or with PS22 itself.
 Check CBL-RFU21 and CBL-RFU12 connectors for a disconnection or a faulty
connection.
If there are no problems, replace the PCB-ASSY-ARC (RIP board) or the PCB-ASSY-AAC
(actuator control board).
Chapter 5 Engine Problems Troubleshooting
Caution
Caution
5-41