Sensor
Status
Symptoms if Defective
Paper end sensor - Stand-
ard cassette
ON
The Add Paper indicator lights even if paper is
remaining.
OFF
The Add Paper indicator does not light when
the paper has run out.
Paper size sensor - 100
sheet cassette
---
"ADD PAPER" or the wrong size is displayed
at power-up.
---
Page separation may be done even if the
original is the same size as the copy paper.
Paper end sensor - 100
sheet cassette
ON
The Add Paper indicator on the lower
cassette’s operation panel lights even if paper
is remaining.
OFF
The Add Paper indicator on the lower
cassette’s operation panel does not light when
the paper has run out.
Thermistor
Open
SC code 0*09 is displayed at power on. (Error
code 9-22)
Short
SC code 0*08 is displayed at power on. (Error
code 9-22)
Thermostat
Open
SC code 0*xx is displayed at power on or at
the start of printing depending on the fusing
standby temperature setting.
6.5.2. Blown Fuse Table
The only service-replaceable fuses are the following.
Fuse
Symptoms if Defective
PSU - F1/ F2/F3
No power to the machine.
(F3 - 220V PSU only)
Thermofuse (Not installed in the US model.)
Fusing power is not supplied.
TROUBLESHOOTING
May 22nd, 1995
ELECTRICAL COMPONENT DEFECTS
6-40