Kyocera TASKalfa 300i Service Manual page 170

2K5
Code
C3900 Backup memory read/write problem
(scanner PWB)
Read and write data does not match.
C3910 Backup memory data problem (scan-
ner PWB)
Data in the specified area of the backup
memory does not match the specified
values.
C4000 Polygon motor synchronization prob-
lem
The polygon motor does not reach the
stable speed within 20 s of the START
signal turning on.
C4010 Polygon motor steady-state problem
Stable OFF is detected for 5 s continu-
ously after polygon motor stability.
C4200 BD initialization problem
ASIC detects a BD error A for 4 s after
the polygon motor rotation has been sta-
bilized.
C6000 Fuser heater break
Fuser thermistor 1 detected less than
40°C/104°F for 14 s during warm-up and
ready in.
Fuser thermistor 2 detected less than
70°C/158°F for 14 s during warm-up and
ready in.
1-4-26
Contents
Causes Check procedures/corrective measures
Defective backup Replace the scanner PWB and check for
RAM or PWB. correct operation.
Defective backup Replace the scanner PWB and check for
RAM or PWB. correct operation.
Poor contact in the Check the connection of connector YC36 on
connector termi- the engine PWB and laser scanner unit, and
nals. the continuity across the connector termi-
nals. Repair or replace if necessary.
Defective polygon Replace the laser scanner unit.
motor.
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation.
Poor contact in the Check the connection of connector YC36 on
connector termi- the engine PWB and laser scanner unit, and
nals. the continuity across the connector termi-
nals. Repair or replace if necessary.
Defective polygon Replace the laser scanner unit.
motor.
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation.
Poor contact in the Check the connection of connector YC36 on
connector termi- the engine PWB and laser scanner unit, and
nals. the continuity across the connector termi-
nals. Repair or replace if necessary.
Defective polygon Replace the laser scanner unit.
motor.
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation.
Defective fuser Replace the fuser heater 1 or 2.
heater 1 or 2.
Installation defec- Check the mounting state of the fuser ther-
tiveness on fuser mistor 1 or 2. If any problem is found, repair
thermistor 1 or 2. it.
Defective fuser Replace the fuser thermostat.
thermostat.
Defective PWB. Replace the power source PWB or engine
PWB and check for correct operation.
Remarks