Kyocera KM-6030 Service Manual page 197

2FB/2FC-4
Code
C4120 BD initialization (C) problem
• When power is turned on, only laser C
is output and ASIC of main PWB
detects a BD error for 2000 ms.
C4200 BD steady-state problem
• ASIC of the main PWB detects a BD
error A for 4000 ms after the polygon
motor rotation has been stabilized.
C5100 Main high-voltage error
• While the main high-voltage output
remote signal is on, an alarm signal is
detected continuously for 400 ms.
C5500 Drum surface potential sensor prob-
lem 1
• The sensor output is 0.5 V or less
when MC REM signal is turned on.
C5510 Drum surface potential sensor prob-
lem 2
• The sensor output is 4.5 V or more
when the MC REM signal is turned on.
1-5-36
Contents
Causes Check procedures/corrective measures
Defective laser Replace the laser scanner unit (see page 1-
scanner unit. 6-42).
Defective main Replace the main PWB and check for cor-
PWB. rect operation.
Poor contact in Check the connection of connector YC8 on
connector termi- the main PWB and the continuity across the
nals. connector terminals. Repair or replace if
necessary.
Defective laser Replace the laser scanner unit (see page 1-
diode. 6-42).
Defective polygon Replace the laser scanner unit (see page 1-
motor. 6-42).
Defective main Replace the main PWB and check for cor-
PWB. rect operation.
Poor contact in Check the connection of connector YC8 on
connector termi- the main PWB and the continuity across the
nals. connector terminals. Repair or replace if
necessary.
Defective high volt- Replace the high voltage PWB and check
age PWB. for correct operation.
Leak of main high- Check the main charger unit and replace if
voltage. necessary (see page 1-6-31).
Poor contact in Check the connection of connector YC7 on
connector termi- the engine PWB and the continuity across
nals. the connector terminals. Repair or replace if
necessary.
Poor contact in the Check the connection of connector YC5 on
drum surface the engine PWB. Reinsert the connector.
potential sensor Also check for continuity within the connec-
connector termi- tor cable. If none, repair or replace the
nals. cable.
Defective drum Replace the drum surface potential sensor.
surface potential
sensor.
Defective high volt- Replace the high voltage PWB and check
age PWB. for correct operation.
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation.
Defective drum Replace the drum surface potential sensor.
surface potential
sensor.
Defective high volt- Replace the high voltage PWB and check
age PWB. for correct operation.
Poor contact in the Check the connection of connector YC5 on
drum surface the engine PWB. Reinsert the connector.
potential sensor. Also check for continuity within the connec-
tor cable. If none, remedy or replace the
cable.
Remarks