Ricoh HL-F1, Field Service Manual

Page: 283 / 296

Error Code
(Hex)
Symptom Probable Cause Solution
79
Temperature sensor harness
disconnected or broken.
In casing temperature
sensor not connected
properly.
Reconnect the in casing
temperature sensor.
In casing temperature
sensor
defective
Replace the in casing
temperature sensor.
7A
Main motor does not
synchronize with the
reference clock. Main PCB defective Replace the main PCB.
Main motor defective Replace the main motor.
7B ASIC error on the main PCB. Main PCB defective Replace the main PCB.
7C Not used. - -
7D Corona wire discharge
Dust is attached on the
corona wire.
Clean the corona wire.
The electrodes are dirty.
Clean the electrodes of the
main body and drum unit.
(Refer to "Location of
Grounding Contacts" in the
“Main Chapters”.)
High-voltage PS PCB
ASSY defective
Replace the high-voltage
PS PCB
ASSY.
Main PCB defective Replace the main PCB.
7E-7F Not used. - -
Error Indication
27
2