The Fixing Heater Does Not Turn Off; Main Charging Is Not Performed (C510); Transfer Charging Is Not Performed; No Developing Bias Is Output - Kyocera Mita KM-1810 Service Manual

Problem
(15) Broken fixing unit
The fixing heater thermistor wire.
does not turn on
(C610).
(16) Dirty sensor part of the
The fixing heater fixing unit thermistor.
does not turn off.
(17) Broken main charger wire.
Main charging is not
Leaking main charger
performed (C510).
housing.
Poor contact in the high-
voltage transformer PCB
connector terminals.
Defective main PCB.
Defective high- voltage
transformer PCB .
(18) Poor contact in the high-
Transfer charging is voltage transformer PCB
not performed. connector terminals.
Defective main PCB.
Defective high-voltage
transformer PCB .
(19) Poor contact in the
No developing bias developing bias wire.
is output.
Poor contact in the high-
voltage transformer PCB
connector terminals.
Defective main PCB.
Defective high-voltage
transformer PCB .
(20) Poor contact in the DF
The copier scans original detection switch
the contact glass connector terminals.
when originals are
Defective DF original
loaded on the DF.
detection switch.
(21) A piece of paper torn from
A paper jam in the copy paper is caught
paper feed, paper around the registration
conveying or fixing switch, ST feed switch*,
section is indicated eject switch or DF timing
when the main switch.
switch is turned on.
Defective registration
switch.
*: Optional.
Causes
Measure the resistance. If it is
thermistor.
Check visually and clean the thermistor sensor parts.
See page 1-5-16.
See page 1-5-16.
See page 1-5-22.
Reinsert the connector. Also check for continuity within the
connector cable. If none, remedy or replace the cable.
Check if CN11-13 on the main PCB goes low when the DF
original detection switch is turned on with 5 V DC present at
CN11-14 on the main PCB. If not, replace the DF original
detection switch.
Check and remove if any.
With 5 V DC present at CN3-14 on the main PCB, check if CN3-
3 on the main PCB remains low when the registration switch is
turned on and off. If it does, replace the registration switch.
Check procedures/corrective measures
, replace the fixing unit
2A1/2
1-5-25