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Kyocera FS-1128MFP Service Manual - Page 133

(6) Black vertical streaks., (7) Unsharpness., (8) Gray background.

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2JN (6) Black vertical streaks. Print example Causes ABC 123 Adhesion of oxide to main charger wire. Defective drum unit. Defective developing roller (developing unit). Check procedures/corrective measures Remove the drum unit (See page 1-5-30). Slide the charger cleaner (green) left and right 2 or 3 times to clean the charger wire, then return it to its original position (CLEANER HOME POSITION). Refer to the operation guide. A streak of toner remaining on drum after printing means that the cleaning blade (in the drum unit) is not working properly. Replace the drum unit (See page 1-5-30). Replace the developing unit (See page 1-5-29). (7) Unsharpness. Print example Causes Defective paper specifications. Defective transfer roller installation. Defective transfer bias output. EcoPrint mode setting. Check procedures/corrective measures Replace paper with the one that satisfies the paper specification. The transfer roller must be supported by the bushes at the both ends. Clean the bush to remove oil and debris. Replace the transfer roller if necessary (See page 1-5-32). Replace the high voltage PWB or control PWB (See page 1-545 or 1-5-39). The EcoPrint mode can provides faint, unsharp printing because it acts to conserve toner for draft printing purpose. For normal printing, turn the EcoPrint mode off by using the operator panel. For details, refer to the operation guide. (8) Gray background. Print example Causes Print density setting. ABC 123 Defective potential on the drum surface. Defective main charger grid. Defective developing roller (developing unit). Check procedures/corrective measures The print density may be set too high. Try adjusting the print density. For details, refer to the operation guide. Replace the drum unit (See page 1-5-30). Clean the main charger grid (See page 1-5-31). If a developing unit which is known to work normally is available for check, replace the current developing unit in the machine with the normal one. If the symptom disappears, replace the developing unit with a new one (See page 1-5-29). 1-4-15

Section	Page
Cover	1
Revision history	3
Safety precautions	5
CONTENTS	11
Specifications	15
1-1-1 Specifications	15
1-1-2 Parts names	18
(1) Overall	18
(2) Operation panel	19
1-1-3 Machine cross section	20
Installation	23
1-2-1 Installation environment	23
1-2-2 Unpacking	24
(1) Unpacking	24
(2) Removing the tapes	25
1-2-3 Installing the expansion memory (option)	28
Maintenance Mode	29
1-3-1 Maintenance mode	29
(1) Executing a maintenance item	29
(2) Maintenance modes item list	30
(3) Contents of the maintenance mode items	34
1-3-2 Management mode	103
(1) Using the management mode	103
(2) Common Settings	104
(3) Copy Settings	108
(4) Sending Settings	108
(5) Document Box Settings	108
(6) Printer Settings	109
(7) Printing Reports/Sending Notice	109
(8) Adjustment/Maintenance	110
(9) Date/Timer	110
(10) Editing Destination (Address Book/Adding One- Touch Keys)	111
(11) Restarting the System	112
(12) Network Setup	112
(13) User Login Administration	114
(14) Job accounting	114
(15) FAX Settings	116
Troubleshooting	119
1-4-1 Paper misfeed detection	119
(1) Paper misfeed indication	119
(2) Paper misfeed detection condition	120
1-4-2 Self-diagnostic function	121
(1) Self-diagnostic function	121
(2) Self diagnostic codes	122
1-4-3 Image formation problems	130
(1) Completely blank printout.	131
(2) All-black printout.	131
(3) Dropouts.	132
(4) Black dots.	132
(5) Black horizontal streaks.	132
(6) Black vertical streaks.	133
(7) Unsharpness.	133
(8) Gray background.	133
(9) Dirt on the top edge or back of the paper.	134
(10) Undulated printing at the right edge (scanning start position).	134
1-4-4 Electric problems	135
1-4-5 Mechanical problems	138
1-4-6 Error codes	139
(1) Error code	139
(2) Table of general classification	140
(2-1) U004XX error code table: Interrupted phase B	142
(2-2) U006XX error code table: Problems with the unit	143
(2-3) U008XX error code table: Page transmission error	143
(2-4) U009XX error code table: Page reception error	143
(2-5) U010XX error code table: G3 transmission	144
(2-6) U011XX error code table: G3 reception	146
(2-7) U017XX error code table: V.34 transmission	148
(2-8) U018XX error code table: V.34 reception	148
(2-9) U023XX error code table: Relay command abnormal reception	148
(2-10) U044XX error code table: Encrypted transmission	148
1-4-7 Send error code	149
(1) Scan to SMB error codes	149
(2) Scan to FTP error codes	150
(3) Scan to E-mail error codes	151
(4) Network Twain error codes	152
(5) Software trouble error codes	152
Assembly and Disassembly	153
1-5-1 Precautions for assembly and disassembly	153
(1) Precautions	153
(2) Drum	153
(3) Toner	153
(4) How to tell a genuine Kyocera Mita toner container	154
1-5-2 Outer covers	155
(1) Detaching and refitting the left cover and right cover	155
1-5-3 Paper feed section	158
(1) Detaching and refitting the paper feed assembly (paper feed roller and pickup roller)	158
(2) Detaching and refitting the retard roller assembly	160
(3) Detaching and refitting the MP paper feed roller	162
(4) Note on removing and Installing the upper registration roller and lower registration roller	164
1-5-4 Optical section	165
(1) Detaching and refitting the DP	165
(2) Detaching and refitting the scanner unit	166
(3) Detaching and refitting the laser scanner unit (LSU)	169
(4) Replacing the image scanner unit (ISU)	173
(5) Detaching and refitting the exposure lamp and inverter PWB	179
1-5-5 Developing section	181
(1) Detaching and refitting the developing unit	181
1-5-6 Drum section	182
(1) Detaching and refitting the drum unit	182
(2) Detaching and refitting the main charger unit	183
1-5-7 Transfer/separation section	184
(1) Detaching and refitting the transfer roller	184
1-5-8 Fuser section	186
(1) Detaching and refitting the fuser unit	186
(2) Switching the fuser pressure	190
1-5-9 PWBs	191
(1) Detaching and refitting the control PWB	191
(2) Detaching and refitting the power source PWB	194
(3) Detaching and refitting the high voltage PWB	197
(4) Detaching and refitting the scanner PWB	201
(5) Detaching and refitting the FAX PWB	202
1-5-10 Others	203
(1) Detaching and refitting the main motor	203
(2) Direction of installing the left cooling fan motor, right cooling fan motor and power source fan motor	204
1-5-11 DP	205
Requirements on PWB Replacement	207
1-6-1 Upgrading the firmware	207
1-6-2 Remarks on control PWB replacement	208
Mechanical Construction	209
2-1-1 Paper feed/conveying section	209
(1) Cassette paper feed section	209
(2) MP tray paper feed section	210
(3) Paper conveying section	211
2-1-2 Drum section	212
(1) Drum section	212
(2) Main charger unit	213
2-1-3 Optical section	214
(1) Scanner unit	214
(2) Image scanner unit (ISU)	215
(3) Laser scanner unit	217
2-1-4 Developing section	219
2-1-5 Transfer/separation section	220
2-1-6 Cleaning section	221
2-1-7 Fuser section	222
2-1-8 Paper exit section	224
2-1-9 Duplex/conveying section	226
2-1-10 DP section	227
Electrical Parts Layout	229
2-2-1 Electrical parts layout	229
(1) PWBs	229
(2) Switches and sensors	231
(3) Other electrical components	232
(4) DP	233
Operation of the PWBs	235
2-3-1 Power source PWB	235
2-3-2 Control PWB	237
2-3-3 Scanner PWB	243
2-3-4 DP driver PWB	246
Appendixes	247
2-4-1 Appendixes	247
(1) Wiring diagram	247
(2) Repetitive defects gauge	249

Match case Limit results 1 per page

2JN

1-4-15

(6) Black vertical streaks.

(7) Unsharpness.

(8) Gray background.

Print example

Causes

Check procedures/corrective measures

Adhesion of oxide to main charger

wire.

Remove the drum unit (See page 1-5-30). Slide the charger

cleaner (green) left and right 2 or 3 times to clean the charger

wire, then return it to its original position (CLEANER HOME

POSITION). Refer to the operation guide.

Defective drum unit.

A streak of toner remaining on drum after printing means that

the cleaning blade (in the drum unit) is not working properly.

Replace the drum unit (See page 1-5-30).

Defective developing roller (develop-

ing unit).

Replace the developing unit (See page 1-5-29).

Print example

Causes

Check procedures/corrective measures

Defective paper specifications.

Replace paper with the one that satisfies the paper specifica-

tion.

Defective transfer roller installation.

The transfer roller must be supported by the bushes at the

both ends. Clean the bush to remove oil and debris. Replace

the transfer roller if necessary (See page 1-5-32).

Defective transfer bias output.

Replace the high voltage PWB or control PWB (See page 1-5-

45 or 1-5-39).

EcoPrint mode setting.

The EcoPrint mode can provides faint, unsharp printing

because it acts to conserve toner for draft printing purpose.

For normal printing, turn the EcoPrint mode off by using the

operator panel. For details, refer to the operation guide.

Print example

Causes

Check procedures/corrective measures

Print density setting.

The print density may be set too high. Try adjusting the print

density. For details, refer to the operation guide.

Defective potential on the drum sur-

face.

Replace the drum unit (See page 1-5-30).

Defective main charger grid.

Clean the main charger grid (See page 1-5-31).

Defective developing roller (develop-

ing unit).

If a developing unit which is known to work normally is avail-

able for check, replace the current developing unit in the

machine with the normal one. If the symptom disappears,

replace the developing unit with a new one (See page 1-5-29).

ABC

123

ABC

123