Kyocera FS C5020N - Color LED Printer Service Manual page 68

2F3/2F4
Code
7402 Cyan developer unit non- installing
error
• The toner sensor 2 inside the cyan
developer unit did not output the den-
sity detection signal, judged the
engine controller PWB (A0004) the
cyan developer unit is not installed.
7403 Magenta developer unit non- install-
ing error
• The toner sensor 1 inside the magenta
developer unit did not output the den-
sity detection signal, judged the
engine controller PWB (A0004) the
magenta developer unit is not installed.
1-5-16
Contents
Causes Check procedures/corrective measures
Defective harness Check the damage of harness of the toner
of the toner sensor sensor 2, check the connection of the con-
2, defective con- nector with the cyan developer unit and
nection of the con- the printer main unit, if there is trouble, rem-
nector between edy or replace.
cyan developer
unit and the printer
main unit or poor
contact of the con-
nector terminals.
Defective toner Replace the cyan developer unit. See page
sensor 2. 1-6-12.
Defective engine Replace the engine controller PWB (A0004).
controller PWB See page 1-6-41.
(A0004).
Defective engine Replace the engine relay PWB (A0009).
relay PWB
(A0009).
Defective harness Check the damage of harness of the toner
of the toner sensor sensor 1, check the connection of the con-
1, defective con- nector with the magenta developer unit and
nection of the con- the printer main unit, if there is trouble,
nector between remedy or replace.
magenta developer
unit and the printer
main unit or poor
contact of the con-
nector terminals.
Defective toner Replace the magenta developer unit. See
sensor 1. page 1-6-12.
Defective engine Replace the engine controller PWB (A0004).
controller PWB See page 1-6-41.
(A0004).
Defective engine Replace the engine relay PWB (A0009).
relay PWB
(A0009).
Remarks