Ricoh D158 - Page 286

Service Call Conditions
D158/D159/D160/D161/D170 5-22 SM
No.
Definition
Symptom Possible Cause
547
-01
B
Zero cross signal malfunction(D158/D159)
Zero cross signals are
detected three consecutive
times at 50 ms intervals.
This error is detected before
the fusing relay is turned on
after turning on the main
power or closing all the
doors.
 Defective fusing relay
 Defective fusing relay circuit
 Defective PSU
 Power supply board
547
-02
B
Zero cross signal malfunction (D158/D159)
The zero cross signal is not
detected for 3 seconds even
though the fusing relay is on
after turning on the main
power or closing all the
doors.
 Defective fusing relay
 Defective fusing relay circuit
 Defective PSU
 Power supply board
547
-03
B
Zero cross signal malfunction(D158/D159)
A detection error occurs
twice or more in 11
frequency detections. This
error is defined when the
detected zero cross signal is
less than 45.
 Defective fusing relay
 Defective fusing relay circuit
 Defective PSU
 Power supply board
547 B
Zero cross signal malfunction (D160/D161/D170)
Detecting low-frequency
wave
 Defective PSU
 Defective BICU