Ricoh M116 Service Manual page 109

Zero cross error

The zero cross signal is detected three times even though the fusing lamp
relay is off when turning on the main power.

The zero cross signal is not detected for 3 seconds even though the fusing
lamp relay is on after turning on the main power or closing the front door.

The detection error occurs twice or more in 11 zero cross signal detections.
This error is defined when the detected zero cross signal is less than 45.

The zero cross signal is not detected three times while the main power
547
remains ON.

Defective fusing relay

Defective fusing relay circuit

Shorted +24V fuse on the PSU

Unstable power supply.
1. Check the power supply source.
2. Replace the +24V fuse on the PSU.
3. Replace the PSU
Fuser 3times jam error
The paper jam counter for the fusing unit reaches 3. The paper jam counter is
cleared if the paper is fed correctly.
This SC is activated only when this function is enabled with "Eng. Maintenance"
(default "OFF").

Defective fusing unit
559

Defective fusing control
1. Clear this SC to send a command after a jam removal.
2. Turn off this function after a jam removal.

Execute "Fuser SC Reset" to recover the machine after completing the
recovery procedure. Otherwise, the machine continues to issue this SC
code and cannot be operated.
SM 6-7
Service Call Conditions
M116/M117