The Exposure Lamp Does Not Turn On; The Exposure Lamp Does Not Turn Off; The Fixing Heater Does Not Turn On (C610); Main Charging Is Not Performed (C510) - Kyocera Mita KM-1530 Service Manual

Problem
(16) Poor contact in the
The exposure lamp exposure lamp connector
does not turn on. terminals.
Defective inverter PCB.
(17) Defective inverter PCB.
The exposure lamp
does not turn off.
(18) Broken wire in fixing
The fixing heater heater.
does not turn on
Fixing unit thermostat
(C610).
triggered.
Broken fixing unit
thermistor wire.
(19) Dirty sensor part of the
The fixing heater fixing unit thermistor.
does not turn off.
(20) 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 .
(21) Poor contact in the high-
Transfer charging is voltage transformer PCB
not performed. connector terminals.
Defective main PCB.
Defective high-voltage
transformer PCB .
(22) Poor contact in the
No developing bias developing bias wire.
is output.
Poor contact in the high-
voltage transformer PCB
connector terminals.
Defective high-voltage
transformer PCB .
(23) Defective original
The original size is detection switch*
not detected.
*1: Optional for 15 cpm copier.
*4: Optional for both 20 cpm and 15 cpm copiers.
Causes
Reinsert the connector. Also check for continuity within the
connector cable. If none, remedy or replace the cable.
If the exposure lamp does not turn on when CN24-1 and CN24-2
on the inverter PCB are held low, replace the inverter PCB.
If the exposure lamp does not turn off when CN24-1 and CN24-2
on the inverter PCB are held high, replace the inverter PCB.
Check for continuity across the heater. If none, replace the
heater.
Check for continuity across the thermostat. If none, remove the
cause and replace the thermostat.
Measure the resistance. If it is ∞ Ω, replace the fixing unit
thermistor.
Check visually and clean the thermistor sensor parts.
See page 1-5-18.
See page 1-5-18.
Check the developing bias wire. If there is any problem, replace
it.
Reinsert the connector. Also check for continuity within the
connector cable. If none, remedy or replace the cable.
Check if the developing bias is output when CN1-3 on the high-
voltage transformer PCB goes low while maintenance item U030
is run. If not, replace the high-voltage transformer PCB.
Check if CN25-2 on the main PCB goes low when the original
3
. detection switch*
detection switch*
*2: For 20 cpm copier only. *3: Optional for 220-240 V specifications of 15 cpm copier.
Check procedures/corrective measures
3
is turned on and off. If not, replace the original
3
.
2AV/X
1-5
1-5-27