Ricoh D158 Service Manual page 288

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