Ricoh D131 Service Manual page 502

Fusing jam: 3 counts
SC559 A
At the fusing exit sensor the paper was detected late for three pulse
counts (lag error), and SP1159 was on.
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Fusing pressure release motor error
SC569 D
During copying, the HP sensor could not detect the actuator, tried
again 3 times and could not detect.
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Toner collection motor error
SC590-00 D
The toner collection motor sensor output does not change for 3 s
while the toner collection motor is on.
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SM Appendix
If this SC occurs, the machine cannot be used until the service
technician cancels the SC code.
This SC occurs only if SP1159 has been set to "1" (On).
(Default: 0 (Off)).
Motor lock because of too much load
Motor driver defective
HP sensor defective, disconnected, connector defective,
harness damaged
Motor lock due to obstruction
Motor driver board defective
Motor connection loose, defective
Toner collection motor sensor disconnected, sensor defective
Rotational transmission shaft (dia. x 30) missing
2-35
SC500: Feed, Transport, Duplex, and Fusing
D131/D132/D133