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Kyocera FS-C5016N Service Manual - Page 68

C. Defective engine controller PWB.

UPC - 632983002629

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FS-C5016N (5) Image is too light. Causes 1. Defective developing bias output. 2. Dirty drum. 3. Dirty SELFOC lens of LED print head. Causes Check procedures/corrective measures 1. Defective developing bias output. A. Defective developer. Check the four colors of image by using the test print of service mode. If the defect appears on a particular color, replace the developer for that color. See pages 1-4-11, 1-6-11. B. Defective bias high voltage PWB. Replace the bias high voltage PWB (KP-980). See page 1-6-30. A. Defective engine controller PWB. Replace the engine controller PWB (KP-1054). See page 1-6-25. B. Defective main controller PWB. Replace the main controller PWB (KP-957). See page 1-6-24. C. Defective drum unit. Replace the drum unit. See page 1-6-12. 2. Dirty drum. Perform the drum surface refreshing. See page 1-4-12. 3. Defective color calibration. A. Dirty sensing surface of the toner ID sensor. B. The printer environment considerably changed since an automatic calibration was made. 4. Dirty SELFOC lens of LED print head. Clean the sensing surface of the toner ID sensor. Perform the color calibration of service mode. See page 1-4-10. Clean the SELFOC lens of LED print head by using LED cleaner. (6) The background is colored. Causes 1. Defective developing sleeve bias output. 2. Defective primary transfer cleaning unit. 3. Defective color calibration. Causes 1. Defective developing sleeve bias output. A. Defective developer. B. Defective bias high voltage PWB. C. Defective engine controller PWB. D. Defective main controller PWB. E. Defective drum unit. 2. Defective primary transfer cleaning unit. 3. Defective color calibration. A. Dirty sensing surface of the toner ID sensor. B. The printer environment considerably changed since an automatic calibration was made. Check procedures/corrective measures Check the four colors of image by using the test print of service mode. If the defect appears on a particular color, replace the developer for that color. See pages 1-4-11, 1-6-11. Replace the bias high voltage PWB (KP-980). See page 1-6-30. Replace the engine controller PWB (KP-1054). See page 1-6-25. Replace the main controller PWB (KP-957). See page 1-6-24. Replace the drum unit. See page 1-6-12. Replace the primary transfer cleaning unit. See page 1-6-16. Clean the sensing surface of the toner ID sensor. Perform the color calibration of service mode. See page 1-6-17. 1-5-24

Section	Page
Cover	1
Revision history	2
Safety precautions	3
Safety warnings and precautions	4
1. Installation Precautions	5
2. Precautions for Maintenance	6
3. Miscellaneous	7
CONTENTS	9
1-1 Specifications	13
1-1-1 Specifications	13
1-1-2 Parts names	15
(1) Overall	15
(2) Operation panel	16
1-1-3 Cross section view	17
1-2 Handling Precautions	19
1-2-1 Drum unit	19
1-2-2 Installation environment	19
1-3 Installation environment	21
1-3-1 Unpacking and installation	21
(1) Installation procedure	21
1-3-2 Installing expansion memory (optional)	27
1-3-3 Installing a memory card (optional)	28
1-3-4 Installing the network interface card (optional)	29
1-3-5 Installing the hard disk unit (optional)	30
1-4 Service mode	31
1-4-1 Service mode	31
(1) Executing service mode	31
1-4-2 Maintenance	44
(1) Method of removing the toner soiling which comes in contact with heat roller and Press roller	44
1-5 Troubleshooting	45
1-5-1 Paper misfeed detection	45
(1) Paper misfeed indication	45
(2) Paper misfeed message display	45
1-5-2 Self-diagnosis	46
(1) Self-diagnostic function	46
(2) Self-diagnostic code	47
1-5-3 Electrical problems	62
1-5-4 Image formation problems	65
1-6 Assembly and Disassembly	73
1-6-1 Precautions for assembly and disassembly	73
(1) Precautions	73
1-6-2 Outer covers	74
(1) Detaching and refitting the top cover	74
(2) Detaching and refitting the rear cover	74
(3) Detaching and refitting the right cover	75
(4) Detaching and refitting the left cover	76
1-6-3 Paper feed unit	77
(1) Detaching and refitting the paper feed unit	77
(2) Detaching and refitting the paper feed roller	78
(3) Detaching and refitting the retard roller	79
(4) Detaching and refitting the secondary transfer roller	80
1-6-4 MP tray feed unit	81
(1) Detaching and refitting the MP tray feed unit	81
(2) Detaching and refitting the MP tray feed roller	82
1-6-5 Developing section	83
(1) Detaching and refitting the developer unit	83
1-6-6 Drum section	84
(1) Detaching and refitting the drum unit	84
(2) Detaching and refitting the LED print heads	85
1-6-7 Primary transfer section	86
(1) Detaching and refitting the primary transfer unit	86
(2) Detaching and refitting the primary transfer belt	87
(3) Detaching and refitting the primary transfer cleaning unit	88
1-6-8 Fuser unit	89
(1) Detaching and refitting the fuser unit	89
(2) Detaching and refitting the fuser thermistor 1 and 2, fuser thermostat 1 and 2, fuser heater lamp 1 and 2, heat roller, and press roller	90
1-6-9 PWBs	96
(1) Detaching and refitting the main controller PWB	96
(2) Detaching and refitting the engine controller PWB and power supply PWB	97
(3) Detaching and refitting the LED print heads relay PWB	100
(4) Detaching and refitting the main high voltage PWB	101
(5) Detaching and refitting the bias high voltage PWB	102
1-6-10 Others	103
(1) Detaching and refitting the main drive unit	103
(2) Detaching and refitting the paper feed drive unit	104
(3) Detaching and refitting the fuser drive unit	105
(4) Detaching and refitting the toner motor 1, 2, 3 and 4	106
(5) Detaching and refitting the ozone filters	107
(6) Detaching and refitting the waste toner duct	108
1-7 Firmware	109
1-7-1 Downloading firmware	109
(1) Format of the firmware files	109
(2) Downloading firmware via the parallel interface	110
(3) Downloading firmware using the memory card	111
(4) Downloading the message data	113
2-1 Mechanical construction	115
2-1-1 Paper feed section	115
(1) Paper feeding from paper cassette	115
(2) Paper feeding from MP tray	119
2-1-2 Developing section	121
(1) Developer	121
(2) Touch down developing method	123
2-1-3 Drum section	124
(1) Drum unit	124
(2) Waste toner ejecting mechanism	127
(3) LED print head	128
(4) Main charger unit	130
2-1-4 Primary transfer section	132
(1) Primary transfer unit	132
(2) Primary transfer cleaning unit	134
2-1-5 Secondary transfer and separation section	137
2-1-6 Fuser section	139
(1) Fuser unit	139
2-2 Electrical Parts Layout	141
2-2-1 Electrical parts layout	141
(1) Main frame and controller box	141
(2) Drum unit, developer unit and fuser unit	143
2-3 Operation of the PWBs	145
2-3-1 Power supply PWB	145
2-3-2 Engine controller PWB	147
(1) Fuser heater lamps control circuit	148
(2) Interlock and 24 V DC power supply circuit	149
2-3-3 Main controller circuit	155
2-4 Appendixes	157
2-4-1 Appendixes	157
(1) Timing chart No. 1 Paper cassette, A4 size	157
(2) Timing chart No. 2 Paper cassette,Legal size	158
(3) Timing chart No. 3 Paper cassette, Letter size papers	159
(4) Timing chart No. 4 MP tray, A4 size	160
(5) Timing chart No. 5 MP tray, Legal size	161
(6) Timing chart No. 6 MP tray, Letter size	162
(7) Timing chart No. 7 Optional paper feeder Two A4 size papers	163
(8) Timing chart No. 8 Paper cassette , A4 size, Slow mode 1 [75 %]	164
(9) Timing chart No. 9 Paper cassette, A4 size, Slow mode 2 [55 %]	165
(10) Timing chart No. 10 MP tray, A4 size, Transparency	166
(11) Wiring diagram	167
(12) Repetitive defects gauge	169

Match case Limit results 1 per page

FS-C5016N

1-5-24

(5)

Image is too light.

Causes

Defective developing bias output.

Dirty drum.

Dirty SELFOC lens of LED print head.

Causes

Check procedures/corrective measures

Defective developing bias output.

A. Defective developer.

Check the four colors of image by using the test print of service mode. If

the defect appears on a particular color, replace the developer for that

color. See pages 1-4-11, 1-6-11.

B. Defective bias high voltage PWB.

Replace the bias high voltage PWB (KP-980). See page 1-6-30.

A. Defective engine controller PWB.

Replace the engine controller PWB (KP-1054). See page 1-6-25.

B. Defective main controller PWB.

Replace the main controller PWB (KP-957). See page 1-6-24.

C. Defective drum unit.

Replace the drum unit. See page 1-6-12.

Dirty drum.

Perform the drum surface refreshing. See page 1-4-12.

Defective color calibration.

A. Dirty sensing surface of the toner ID sen-

sor.

Clean the sensing surface of the toner ID sensor.

B. The printer environment considerably

changed since an automatic calibration

was made.

Perform the color calibration of service mode. See page 1-4-10.

Dirty SELFOC lens of LED print head.

Clean the SELFOC lens of LED print head by using LED cleaner.

(6)

The background is colored.

Causes

Defective developing sleeve bias output.

Defective primary transfer cleaning unit.

Defective color calibration.

Causes

Check procedures/corrective measures

Defective developing sleeve bias output.

A. Defective developer.

Check the four colors of image by using the test print of service mode. If

the defect appears on a particular color, replace the developer for that

color. See pages 1-4-11, 1-6-11.

B. Defective bias high voltage PWB.

Replace the bias high voltage PWB (KP-980). See page 1-6-30.

C. Defective engine controller PWB.

Replace the engine controller PWB (KP-1054). See page 1-6-25.

D. Defective main controller PWB.

Replace the main controller PWB (KP-957). See page 1-6-24.

E. Defective drum unit.

Replace the drum unit. See page 1-6-12.

Defective primary transfer cleaning unit.

Replace the primary transfer cleaning unit. See page 1-6-16.

Defective color calibration.

Dirty sensing surface of the toner ID sensor.

Clean the sensing surface of the toner ID sensor.

B. The printer environment considerably

changed since an automatic calibration

was made.

Perform the color calibration of service mode. See page 1-6-17.