Ricoh M156, Service Manual

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Service Call
SM 6-7 M156/M157/M176/M177
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
Defective fusing relay

Defective fusing relay circuit

S24V fuse on the PSU

Unstable power supply.
1. Check the power supply source.
2. Replace the +24V fuse on the PSU.
3. Replace the PSU
559
Fuser 3times jam error
The paper jam counter for the fusing unit reaches 3. The paper jam counter is
cleared if the paper is fed correctly.
This SC is activated only when this function is enabled with "Engine
Maintenance" (default "OFF").

Defective fusing unit

Defective fusing control
1. Clear this SC to send a command after a jam removal.
2. Turn off this function after a jam removal.

Execute "Fuser SC Reset" to recover the machine after completing the
recovery procedure. Otherwise, the machine continues to issue this SC
code and cannot be operated.
SC 6xx (Communication and Other Error)
669
EEPROM communication error
An unexpected value exists in the initialization flag of the EEPROM

EEPROM not connected

Defective EEPROM
1. Installing the EEPROM.
2. Replacing the EEPROM.