Ricoh D158 - Page 288

Service Call Conditions
D158/D159/D160/D161/D170 5-24 SM
No.
Definition
Symptom Possible Cause
555 A
Fusing lamp overheat error (rear)
After the fusing temperature
reaches the target
temperature, the fusing
lamp does not turn off for 20
consecutive seconds.

Fusing thermistor defective or out of
position
 Power supply board
557 D
Zero cross frequency error (D158/D159)
The detection error occurs
10 times or more in 11
frequency detections. This
error is defined when the
detected zero cross signal is
more than 66.
 Caused by noise
559 A
Jam error detected 3 times in succession
The exit sensor and the
duplex sensor detect a
paper jam 3 times in
succession
This condition can occur
when SP1-159-001 is set to
‘on’. The default is ‘off’.
 Paper jams can occur for the
following reasons.
 Dampness
 Paper curl
 Incorrect paper setting in the paper
tray
 Stripper pawls coming apart
590 B
Left exhaust fan motor error (D160/D161/D170)
The CPU detects an
exhaust fan lock signal for
more than 5 seconds.
 Loose connection of the exhaust
fan motor
 Too much load on the motor drive
591 B
Rear exhaust fan motor error (D160/D161/D170)
The CPU detects an
exhaust fan lock signal for
more than 5 seconds.
 Loose connection of the exhaust
fan motor
 Too much load on the motor drive