Error Code 6020 [A2] (Abnormally High Fixing Temperature Error) - Kyocera Mita FS-6020 Service Manual

(1-5) Error code 6020 [A2] (abnormally high fixing temperature error)

Detection conditions
• The fixing heater lamp runaway protection circuit in the engine/high voltage PWB outputs continuously the abnormally
high temperature detection signal (HTEMPN) to the CPU for a longer time than specified.
Corrective measures
Cautions
Be careful when handling the fixing unit because it is hot.
Take care not to get an electric shock because AC power is supplied from the power source PWB to the
fixing unit.
Is there any damage to
the harness (S028??) between
the fixing unit and the engine/high voltage
PWB or improper connection at the YC5
connector on the engine/high-
Turn on the printer, connect a tester
or an oscilloscope, and measure as
follows.
No. 1 of the YC5 connector
on the engine/high voltage PWB
higher than 3.2 V DC for more than
3 seconds when the
Replace the fixing unit (fixing thermistor).
(See pages 1-6-18 and 23.)
* Possible defective locations
Start
(causes)
• Engine/high voltage PWB
• Fixing unit
• Power source PWB
voltage PWB?
If any problem is found on the
Yes
harness or the connector,
repair or replace it.
Is the voltage at pin
error occurs?
Replace the engine/high voltage
Yes
PWB. (See page 1-6-26.)
No
OK?
Yes
Replace the engine/high voltage
PWB or the power supply PWB
(See page 1-6-26 and 29.)
End
No
No
FS-6020
1-5-7