Kyocera KM-6030, Service Manual

Page: 197 / 463

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