Kyocera 1102H03NL0, Service Manual

Page: 157 / 392

2H0/2HZ-1
1-4-25
C4000 Polygon motor synchronization prob-
lem
The polygon motor does not reach the
stable speed within 20 s of the START
signal turning on.
Poor contact in the
connector termi-
nals. Check the connection of connector YC2 on
the engine PWB and laser scanner unit, and
the continuity across the connector termi-
nals. Repair or replace if necessary.
Defective polygon
motor. Replace the laser scanner unit.
Defective engine
PWB. Replace the engine PWB and check for cor-
rect operation.
C4010 Polygon motor steady-state problem
Stable OFF is detected for 5 s continu-
ously after polygon motor stability.
Poor contact in the
connector termi-
nals. Check the connection of connector YC2 on
the engine PWB and laser scanner unit, and
the continuity across the connector termi-
nals. Repair or replace if necessary.
Defective polygon
motor. Replace the laser scanner unit.
Defective engine
PWB. Replace the engine PWB and check for cor-
rect operation.
C4200 BD steady-state problem
ASIC detects a BD error A for 2 s after
the polygon motor rotation has been sta-
bilized.
Poor contact in the
connector termi-
nals. Check the connection of connector YC2 on
the engine PWB and laser scanner unit, and
the continuity across the connector termi-
nals. Repair or replace if necessary.
Defective laser
scanner unit. Replace the laser scanner unit.
Defective engine
PWB. Replace the engine PWB and check for cor-
rect operation.
C6000 Fuser heater break
Fuser thermistor 1 detected less than
40
°
C/104
°
F for 10 s during warm-up and
ready in.
Defective fuser
heater M or S. Replace the fuser heater M or S.
Installation defec-
tiveness on fuser
thermistor 1. Check the mounting state of the fuser ther-
mistor 1. If any problem is found, repair it.
Defective fuser
thermostat. Replace the fuser thermostat.
Defective PWB. Replace the power source PWB or engine
PWB and check for correct operation.
C6020 Abnormally high fuser thermistor
center temperature
Fuser thermistor 2 is detected 230
°
C/
446
°
F or more for 40 ms.
Installation defec-
tiveness on fuser
thermistor 2. Check the mounting state of the fuser ther-
mistor 2. If any problem is found, repair it.
Defective fuser
thermistor 2. Replace the fuser thermistor 2.
Defective engine
PWB. Replace the engine PWB and check for cor-
rect operation.
C6050 Abnormally low fuser thermistor cen-
ter temperature
Fuser thermistor 2 is detected 100
°
C/
212
°
F less than 1 s continuously during
copying.
Defective fuser
heater M or S. Replace the fuser heater M or S.
Installation defec-
tiveness on fuser
thermistor 2. Check the mounting state of the fuser ther-
mistor 2. If any problem is found, repair it.
Defective PWB. Replace the power source PWB or engine
PWB and check for correct operation.
Code Contents
Remarks
Causes Check procedures/corrective measures