3-66
Chapter 3 Troubleshooting
010-349 FRONT THERMISTOR DISCONNECTION
Description
The system detected an open circuit of the
FRONT THERMISTOR.
BSD on : CH10.1 CH10.8
Procedure
Turn Off the power, remove the FUSER ASSY, and allow it to
cool down.
Measure the resistance between the FUSER ASSY connectors
P600-4 (+) and P600-6 (-).
Is the resistance between 30 and 190 k Ohm?
Y
N
Check the FRONT THERMISTOR in the FUSER ASSY
for an open circuit and poor contact. If no problems are
found, replace the FUSER ASSY.(PL7.1)
Reinstall the FUSER ASSY, turn On the power, and run
DC140
[010-100].
Is the monitor value between 900 and 1000?
Y
N
Turn Off the power and check the wire between the MCU
PWB J404-11 and the FRONT THERMISTOR J211-1 for
an open circuit and poor contact.
Is the open circuit or poor contact found?
Y
N
Check the wire between the MCU PWB J404-12 and
the FRONT THERMISTOR J211-2 for an open
circuit and poor contact.
Is the open circuit or poor contact found?
Y
N
Replace the MCU PWB. (PL13.1)
Repair the open circuit or poor contact.
Repair the open circuit or poor contact.
Replace the MCU PWB. (PL13.1)
010-350 SUB HEATER OVER HEAT FAILURE
Description
The REAR THERMISTOR detected an abnormal
high temperature.
BSD on : CH10.1 CH10.8
Procedure
Turn Off the power, remove the FUSER ASSY, and allow it to
cool down.
Measure the resistance between the FUSER ASSY connectors
P600-7 (+) and P600-9 (-).
Is the resistance between 30 and 190 k Ohm?
Y
N
Check the REAR THERMISTOR in the FUSER ASSY for
an open circuit and poor contact. If no problems are found,
replace the FUSER ASSY. (PL7.1)
Reinstall the FUSER ASSY, turn On the power, and run
DC140
[010-101].
Is the monitor value between 900 and 1000?
Y
N
Turn Off the power and check the wire between the MCU
PWB J404-14 and the REAR THERMISTOR J212-1 for
an open circuit and poor contact.
Is the open circuit or poor contact found?
Y
N
Check the wire between the MCU PWB J404-13 and
the FRONT THERMISTOR J212-2 for an open
circuit and poor contact.
Is the open circuit or poor contact found?
Y
N
Replace the MCU PWB. (PL13.1)
Repair the open circuit or poor contact.
Repair the open circuit or poor contact.
Measure the voltage between the MCU PWB J404-5 (+) and
GND (-)?
Is +5 VDC measured before a failure occurs.
Y
N
Measure the voltage between the AC DRIVE PWB J590-3
(+) and GND (-).
Is +5 VDC measured before a failure occurs.
Y
N
Replace the AC DRIVE PWB. (PL9.2)
Check for an open circuit and poor contact.
Replace the MCU PWB. (PL13.1)
To clear this fault, clear the value of
DC131
[744-
003] to “0”.
Summary of Contents for Workio DP-C401
Page 4: ...This page is intentionally left blank ...
Page 5: ...Chapter 1 General ...
Page 22: ...1 16 Chapter 1 General 1 3 Type of Paper ...
Page 23: ...1 17 Chapter 1 General ...
Page 24: ...Chapter 2 Maintenance ...
Page 63: ...Chapter 3 Troubleshooting ...
Page 118: ...3 44 Chapter 3 Troubleshooting I F PWB PL9 1 MCU PWB PL13 1 ...
Page 445: ...Chapter 4 Parts List ...
Page 548: ......