Kyocera FS-1050 - B/W Laser Printer User manual

SERVICE
MANUAL
Published in Dec. ’01
Laser printer


Contents
Chapter 1
1-1 Printer specifications .......................................................................................................................................1-3
1-2 Names of parts ................................................................................................................................................1-6
1-3 Safety information............................................................................................................................................1-7
1-4 Environmental requirements..........................................................................................................................1-10
1-5 About the toner container ..............................................................................................................................1-14
Chapter 2
2-1 Unpacking........................................................................................................................................................2-3
2-2 Installing the printer .........................................................................................................................................2-4
2-3 Using the operator panel ...............................................................................................................................2-15
Chapter 3
3-1 Maintenance/Adjustments ...............................................................................................................................3-3
Chapter 4
4-1 Electrophotographic system ............................................................................................................................4-3
4-2 Paper feeding system....................................................................................................................................4-15
4-3 Electrical control system................................................................................................................................4-18
Chapter 5
5-1 General instructions.........................................................................................................................................5-3
5-2 Disassembly ....................................................................................................................................................5-4
Chapter 6
6-1 Troubleshooting ...............................................................................................................................................6-3
Appendix A
Timing charts ........................................................................................................................................................ A-3
Wiring diagram...................................................................................................................................................... A-9
Appendix B
Status page........................................................................................................................................................... B-3
Appendix C
Parallel interface ................................................................................................................................................... C-3
USB interface........................................................................................................................................................ C-6
Serial interface (Optional) ..................................................................................................................................... C-7

Chapter 1 Contents
1-1 Printer specifications ...................................................................................................................... 1-3
1-1-1 Specifications ............................................................................................................................ 1-3
(1) Engine ................................................................................................................................. 1-3
(2) Controller............................................................................................................................. 1-4
(3) Weight and dimensions .......................................................................................................1-4
(4) Power requirements ............................................................................................................ 1-5
(5) Environmental requirements ............................................................................................... 1-5
1-2 Names of parts ................................................................................................................................. 1-6
1-2-1 Name of parts ............................................................................................................................ 1-6
1-3 Safety information ........................................................................................................................... 1-7
1-3-1 Safety information...................................................................................................................... 1-7
(1) Laser safety......................................................................................................................... 1-7
(2) Laser notice......................................................................................................................... 1-7
(3) Laser caution label on the scanner unit............................................................................... 1-7
(4) CDRH regulations (U.S.A.).................................................................................................. 1-9
(5) Ozone concentration ........................................................................................................... 1-9
(6) Optional equipment ............................................................................................................. 1-9
(7) Important note on the interface connectors......................................................................... 1-9
1-4 Environmental requirements ........................................................................................................ 1-10
1-4-1 Environmental conditions ........................................................................................................ 1-10
(1) Clearance ...........................................................................................................................1-11
(2) Places to avoid .................................................................................................................. 1-12
(3) Note on power ................................................................................................................... 1-12
(4) Removing the printer ......................................................................................................... 1-13
1-5 About the toner container ............................................................................................................. 1-14
1-5-1 Toner container ........................................................................................................................ 1-14
(1) Toner container handling ................................................................................................... 1-14
(2) Toner container storage.....................................................................................................1-15

Chapter 2 Contents
2-1 Unpacking......................................................................................................................................... 2-3
2-1-1 Unpacking and inspection ......................................................................................................... 2-3
2-2 Installing the printer ........................................................................................................................ 2-4
2-2-1 Installing the toner container ..................................................................................................... 2-4
2-2-2 Expanding memory.................................................................................................................... 2-8
(1) Minimum memory requirements.......................................................................................... 2-8
(2) DIMM specifications ............................................................................................................ 2-8
(3) Notes on handling DIMM..................................................................................................... 2-9
(4) Installing the DIMM............................................................................................................ 2-10
(5) Testing the expansion memory...........................................................................................2-11
(5) Installing the memory card (CompactFlash)...................................................................... 2-12
(6) Installing the network interface card.................................................................................. 2-14
2-3 Using the operator panel............................................................................................................... 2-15
2-3-1 Operator panel......................................................................................................................... 2-15
(1) LED Indicators................................................................................................................... 2-15
(2) keys ................................................................................................................................... 2-16
(3) LCD message display ....................................................................................................... 2-17
Interface indicator ................................................................................................................... 2-18
Paper size indicator ................................................................................................................ 2-18
2-3-2 Menu selection system ............................................................................................................ 2-19
(1) Menu selection and sequence........................................................................................... 2-19

Chapter 3 Contents
3-1 Maintenance/Adjustments .............................................................................................................. 3-3
3-1-1 Life expectancy of modules ....................................................................................................... 3-3
3-1-2 Toner container .......................................................................................................................... 3-4
(1) When to replace the toner container ................................................................................... 3-4
(2) Notes on changing toner container ..................................................................................... 3-4
(3) Toner container replacement ............................................................................................... 3-5
(4) Toner saver mode (EcoPrint) ............................................................................................... 3-6
3-1-3 Cleaning the printer ................................................................................................................... 3-7
(1) Cleaning the registration roller ............................................................................................3-8
(2) Cleaning the main charger wire........................................................................................... 3-8
3-1-4 Updating the firmware ............................................................................................................... 3-9
(1) Firmware program data format............................................................................................ 3-9
(2) Downloading the firmware from the parallel interface ....................................................... 3-10
(3) Downloading the firmware from the memory card............................................................. 3-12
(4) Downloading errors ........................................................................................................... 3-14

Chapter 4 Contents
4-1 Electrophotographic system .......................................................................................................... 4-3
4-1-1 Electrophotographic cycle ......................................................................................................... 4-3
Process unit mechanism........................................................................................................... 4-4
(1) Main charging...................................................................................................................... 4-5
Photo conductive drum ............................................................................................................. 4-5
Charging the drum .................................................................................................................... 4-6
(2) Exposure ............................................................................................................................. 4-7
Laser scanner unit .................................................................................................................... 4-8
Drum surface potential.............................................................................................................. 4-9
(3) Development ..................................................................................................................... 4-10
(4) Transfer ..............................................................................................................................4-11
(5) Fusing................................................................................................................................ 4-12
Fuser unit mechanism ............................................................................................................4-13
(6) Cleaning ............................................................................................................................ 4-14
4-2 Paper feeding system.................................................................................................................... 4-15
4-2-1 Paper feed control ................................................................................................................... 4-16
Paper feeding mechanism ...................................................................................................... 4-17
4-3 Electrical control system .............................................................................................................. 4-18
4-3-1 Electrical parts layout .............................................................................................................. 4-18
4-3-2 Operation of circuit boards ..................................................................................................... 4-19
(1) Main board ........................................................................................................................ 4-19
(2) Engine board ..................................................................................................................... 4-20
Eraser lamp control circuit ...................................................................................................... 4-21
Polygon motor control circuit .................................................................................................. 4-25
(3) Power supply board........................................................................................................... 4-26
(4) Bias board ......................................................................................................................... 4-27
(5) High voltage board ............................................................................................................ 4-28
Interlock switch ....................................................................................................................... 4-29

Chapter 5 Contents
5-1 General instructions ........................................................................................................................ 5-3
5-1-1 Screw/hardware......................................................................................................................... 5-3
5-1-2 Before starting disassembly ...................................................................................................... 5-3
5-2 Disassembly ..................................................................................................................................... 5-4
5-2-1 Removing the process unit ........................................................................................................ 5-4
5-2-2 Removing the principal outer covers ......................................................................................... 5-5
(1) Removing the top cover/face-down output tray................................................................... 5-5
(2) Removing the right cover ....................................................................................................5-6
(3) Removing the left cover....................................................................................................... 5-6
5-2-3 Removing the feed roller ........................................................................................................... 5-7
5-2-4 Removing the MP tray feed roller .............................................................................................. 5-8
5-2-5 Removing the transfer roller .................................................................................................... 5-10
5-2-6 Removing the principal circuit boards.......................................................................................5-11
(1) Removing the engine board ...............................................................................................5-11
(2) Removing the main board ................................................................................................. 5-12
(3) Removing the power supply board and high voltage board .............................................. 5-14
(4) Removing the bias board .................................................................................................. 5-15
5-2-7 Removing the main motor and drive unit................................................................................. 5-16
5-2-8 Removing and splitting the fuser unit ...................................................................................... 5-20
(1) Removing the separators .................................................................................................. 5-22
(2) Removing the heater lamp ................................................................................................ 5-23
(3) Removing the heat roller ................................................................................................... 5-24
(4) Removing the thermistor ................................................................................................... 5-26
(5) Removing the thermal cutout ............................................................................................ 5-27
(6) Removing the press roller ................................................................................................. 5-28
5-2-9 Removing the laser scanner unit and the eraser lamp ............................................................ 5-29
5-2-10 Removing the main charger unit............................................................................................ 5-32

Chapter 6 Contents
6-1 Troubleshooting............................................................................................................................... 6-3
6-1-1 General error handling............................................................................................................... 6-3
(1) Maintenance messages ...................................................................................................... 6-3
(2) Error messages ................................................................................................................... 6-5
6-1-2 Diagnostic (Service error messages) ........................................................................................ 6-7
(1) Call service 7980 - Waste toner full [Total page count less than 100,000 pages of printing]........ 6-7
(2) Call service 7990 - Waste toner full [Total page count more than 100,000 pages of printing] ..... 6-8
(3) Call service 2010 - Main motor error ................................................................................... 6-9
(4) Call service 4000 - Laser scanner unit [Polygon motor] error ........................................... 6-10
(5) Call service 4200 - Laser scanner unit [Pin photo diode] error ......................................... 6-12
(6) Call service 6110 - Fuser unit error ................................................................................... 6-14
(7) Call service 5300 - Eraser lamp error................................................................................ 6-15
(8) Call service F010 - Controller checksum error .................................................................. 6-16
(9) Call service F020 - Controller RAM read/write error ......................................................... 6-16
6-1-3 Print quality problems .............................................................................................................. 6-17
(1) Completely blank printout.................................................................................................. 6-18
(2) All-black printout ................................................................................................................ 6-19
(3) Dropouts............................................................................................................................ 6-20
(4) Black dots.......................................................................................................................... 6-21
(5) Black horizontal streaks ....................................................................................................6-21
(6) Black vertical streaks......................................................................................................... 6-22
(7) Unsharpness ..................................................................................................................... 6-23
(8) Gray background............................................................................................................... 6-24
(9) Dirt on the top edge or back of the paper.......................................................................... 6-25
Repetitive defects gauge ........................................................................................................6-26
6-1-4 Correcting a paper jam ............................................................................................................ 6-27
(1) Jam at the face-down and face-up trays ........................................................................... 6-27
(2) Jam at the paper cassette ................................................................................................. 6-28
(3) Jam inside the printer ........................................................................................................ 6-28

6-3 FS-1050
6-1 Troubleshooting
6-1-1 General error handling
(1) Maintenance messages
Message Corrective action
The ATTENTION indicator flashes. Indicates that paper has
run out. Supply paper according to the paper source (Cassette
or MP tray) and paper size (A4, B5, A5, etc.) displayed.
The paper cassette is not properly closed. Make sure the paper
cassette is closed securely.
The ATTENTION indicator turns on and the READY
indicator goes off. Indicates a problem with the controller
and the operator panel. Call a service person. The printer
does not operate when this message is displayed.
The ATTENTION indicator turns on. Indicates a controller
error. Call a service person. The printer does not operate
when this message is displayed.
The ATTENTION indicator turns on. Indicates a mechanical
error. Call a service person. 0123456 indicates the number
of printed pages.
The ATTENTION indicator turns on. The waste toner
reservoir is full. 0123456 indicates the number of printed
pages. (See page 6-7)
The ATTENTION indicator turns on and the READY
indicator flashes. Indicates that the cassette and data paper
sizes do not match. The printer feeds from the MPtray when
the paper in the cassette is of a different size than that of the
print data. Put paper of the correct size in the MP tray then
press the GO key to resume printing.
The ATTENTION indicator flashes. Indicates that a failure
has occurred with the optional network interface board.
Check the optional interface installed in the printer.
Add paper (paper source)
(size)
Call service
person F0
Call service
####
Call service
####:0123456
Call service
7980:0123456
Load MP tray
(paper size)
Option Interface
Error ##

Published in Oct., 2001
FS105070770
842FS1050120
FS-1050
Laser Printer
PARTS LIST

FS-1050
3
1 - Enclosure
0A02
0032
0002
0003
0010 0011
0012
0006 0038
0007
G101
G002
G002
0008
0005 0024
0022
0004
0023
G003
0036 0030
0031
0031
0037
0037
0035
0026
Since April 2001
Until March 2001