Kyocera Mita FS-C5016N - Color LED Printer Service Manual page 70

FS-C5016N
(9) Streaks are printed horizontally.
Causes
1. Poor contact of output terminal of main
charger unit.
2. Poor contact of grounding terminal of
drum unit.
3. Poor contact of developing bias terminal
of developer.
(10) Spots are printed.
Causes
1. Dirty or flawed drum.
2. Deformed or worn cleaning blade in the
drum unit.
3. Defect fur brush of the primary transfer
cleaning unit.
4. Flawed developing sleeve roller.
5. Dirty heat roller and press roller.
(11) The leading edge of image begins
to print too early or too late.
Causes
1. Registration clutch operating incorrectly.
2. Defective engine controller PWB.
3. Defective main controller PWB.
1-5-26
Causes
1. Poor contact of output terminal of main charger unit.
2. Poor contact of grounding terminal of drum unit.
3. Poor contact of developing bias terminal of developer.
Check procedures/corrective measures
Insert the main charger properly.
Replace the drum unit. See page 1-6-12.
Replace the developer. See page 1-6-11.
Causes
1. Dirty or flawed drum.
2. Deformed or worn cleaning blade in the drum unit.
3. Defect fur brush of the primary transfer cleaning unit.
4. Flawed developing sleeve roller.
5. Dirty heat roller and press roller.
Check procedures/corrective measures
Perform the drum surface refreshing. See page 1-4-13.
Replace the drum unit. See page 1-6-12.
Replace the primary transfer cleaning unit. See page 1-6-16.
Replace the developer. See page 1-6-11.
Perform the heat roller and press roller cleaning. See page 1-4-14.
Causes
1. Registration clutch operating incorrectly.
2. Defective engine controller PWB.
3. Defective main controller PWB.
Check procedures/corrective measures
Check the installation of the registration clutch. If it operates incorrectly,
replace it.
Replace the engine controller PWB (KP-1054). See page 1-6-25.
Replace the main controller PWB (KP-957). See page 1-6-24.