SC
[Level]
Symptom Possible Cause/Required Action
detections. This error is
defined when the
detected zero cross
signal is less than 17 for
200 ms.
557
[C]
Zero cross frequency error
The detection error occurs ten
times in a row in ten zero cross
signal detections. This error is
defined when the detected
zero cross signal is more than
28 for 200 ms.
This SC is only logged. In this
case, the power frequency is
defined as 60 Hz.
• Noise (high frequency)
1. Check the power supply source.
559
[A]
Continuous paper jam at Fusing unit
The paper jam occurs three
times consecutively at the
fusing unit only when the SP
1159 1 is set to "1 (ON)". If
not, this SP does not occur.
The jam counter is cleared
when a sheet of paper is fed
normally.
• Defective fusing entrance sensor
• Defective EGB
1. Replace the fusing entrance sensor.
2. Replace the EGB.
687
[D]
Controller board command error
A command from the
controller board is not
received.
• Loose connection
• Defective controller board
• Defective EGB
1. Check the connection of the controller board.
2. Replace the controller board.
3. Replace the EGB.
Service Call Conditions
109
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