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(10) FATAL ERROR CODE 17H / SERVICE CALL 17 TONER RACK: Incorrect devel-
oping rack rotation
<Remedy>
(11) FATAL ERROR CODE 18H /SERVICE CALL 18 FUSER UNIT: Faulty warm-up
detected
(12) FATAL ERROR CODE 19H / SERVICE CALL 19 FUSER UNIT: Incorrect fusing
roller low temperature
<Remedy>
Step Remedy
Reference
page
WARNING DIAGRAM
Control signal
Location(electrical com-
ponent)
1
Replace the image transfer belt
unit.
-- -
Electrical components for detection of the malfunction
Rack motor (M2)
Rack clutch (CL1)
Rack home position sensor (PC4)
Master board (PWB-A)
Controller control board (PWB-P)
Step Remedy
Reference
page
WARNING DIAGRAM
Control signal
Location(electrical com-
ponent)
1 Check PC4 operation. 149 PC4_ON 3-F
2 Check CL1 operation. 150 CL1_REM 2-F
3 Check M2 operation. 151 - 3-E
4 Replace PWB-A. - - -
5 Replace PWB-P. - - -
Electrical components for detection of the malfunction
Fusing roller heater lamp (H1)
Fusing pressure roller heater lamp (H2)
Thermostat (TS1)
Master board (PWB-A)
Power unit (PU)
Step Check Result Remedy
WARNING DIAGRAM
Control sig-
nal
Location(electri-
cal component)
1
Check for continuity at H1 and
H2.
NO
Replace H1 and
H2.
-2-B, 2-C
2 Check for continuity at TS1. NO Replace TS1. - 2-C
3
Is the resistance at TH1 infinite?
(between CN18-1 and -2 on the
thermistor)
YES
Clean TH1 or
replace the fusing
unit.
HEATER 2-D
NO
Replace PU.
Replace PWB-A.