Kyocera Mita FS-C5016N - Color LED Printer Service Manual page 66

FS-C5016N
(1) No image appears (entirely
white).
Causes
1. The LED print head has not done func-
tioning.
A. Loose connection with drum connectors.
B. Loose connection with the LED print head
connector.
C. Defective main controller PWB.
D. Defective LED print heads relay PWB.
See page 1-6-26.
2. Defective developing sleeve bias or devel-
oping magnet bias output.
A. Defective engine controller PWB.
B. Defective main high voltage PWB.
3. Defective secondary transfer bias output.
A. Defective engine controller PWB.
B. Defective bias high voltage PWB.
4. Malfunction of the developer installation.
(2) No image appears (entirely
black).
Causes
1. No main charging.
A. Poor contact of output terminal of main
high voltage PWB.
B. Defective main high voltage PWB.
C. Poor contact of output terminal of main
high voltage PWB.
D. Defective engine controller PWB.
2. Defective LED print heads relay PWB.
1-5-22
Causes
1. The LED print head has not done functioning.
2. Defective developing sleeve bias or developing magnet bias output.
3. Defective secondary transfer bias output.
4. Malfunction of the developer installation.
Check procedures/corrective measures
Check connection between the drum unit and the unit frame. If neces-
sary, secure the connection. (Do not attempt to disconnect/connect the
connector while power is on.)
Check CN2 (LED print head connector) for connection. If necessary,
secure the connection. (Do not attempt to disconnect/connect the con-
nector while power is on.)
Replace the main controller PWB (KP-957). See page 1-6-24.
Replace the LED print heads relay PWB (KP-1048). See page 1-6-28.
Replace the engine controller PWB (KP-1054). See page 1-6-25.
Replace the main high voltage PWB (KP-978). See page 1-6-30.
Replace the engine controller PWB (KP-1054). See page 1-6-25.
Replace the bias high voltage PWB (KP-980). See page 1-6-30.
Reinstall the developer. See page 1-6-11.
Causes
1. No main charging.
2. Defective LED print heads relay PWB.
Check procedures/corrective measures
Check the installation of the main high voltage PWB (KP-978), If it instal-
lation incorrectly, reinstall it.See page 1-6-29.
Replace the main high voltage PWB (KP-978). See page 1-6-29.
Check the installation of the main high voltage PWB (KP-978), If it instal-
lation incorrectly, reinstall it.See page 1-6-30
Replace the engine controller PWB (KP-1054). See page 1-6-25.
Replace the LED print heads relay PWB (KP-1048). See page 1-6-28.