Ricoh M281 Series Service Manual page 482

Service Call 501-582
6.6.3 SC500 (ENGINE: PAPER TRANSPORT 3: PAPER FEED,
DUPLEX, TRANSPORT, FUSING)
SC No. Type
SC547-00 D
D255/D256/M281/M282
Error Name/Error Condition/Major Cause/Solution
Zero Cross Signal Error
While fusing lamp ON/OFF control is performed, the zero cross
signal is not input within 2 seconds consecutively.

Fusing unit defective

PSU defective

IOB defective

Fusing unit defective
1. Reconnect the following connectors.

PSU – IOB connector
2. If the connector is broken, shorted, or grounded,
replace the connector.

PSU defective
Replace the PSU.

IOB defective
Replace the IOB.
6-44 SM