Service Call
SM 6-11 M0C3/M0C4/M0C5/M0C6/M0C7
No. Type Error Name/Error Condition/Major Cause/Solution
1. Reset the SC.
2. Replace the environment thermistor.
6.2.5 SC 6XX (COMMUNICATION AND OTHER ERRORS)
No. Type Error Name/Error Condition/Major Cause/Solution
SC688 D PRREQ signal not asserted
The print request signal (PRREQ) signal is not asserted within the prescribed
time after paper reaches the registration stand-by position,
• Main board error
• Communication error
1. Turn the power OFF and ON.
2. Check the interface harness of the main board.