Mita-Kyocera FS5900C Removal and Replacement Procedures
FS-5900C Service Manual
5. Removal and Replacement Procedures
Caution:
The imaging unit (OPC belt and accumulator belt) is extremely light sensitive. Make sure that
it is not exposed to li ght fo r more than 45 seconds , or it may da mage t he unit. Ne ver expose the
imaging unit to direct sunlight. When servicing the printer, ensure that the imaging unit is not
exposed to light. If necessary, remove it and store in a dark place.
5.1 Upper Rear, Lower Rear and Top Covers
1. Remove the upper rear cover (4 screws).
2. Remove the lower rear cover (4 screws).
3. Separate the lower rear cover from the duct tube.
4. Remove the top cover (3 screws).
The front of the top cover is held by metal tabs.
Tilt the top cover up from the rear (arrow 1), slide it
back slightly (arrow 2), and remove it.
Screw
Fan
Cover
Screw
Upper Rear
Cover
Top Cover
~
A
C
I
N
Opening on
Chassis Frame
Metal Tab
2
1
5.2 Left Side Cover and Multi-purpose Tray
1. Remove the upper rear cover and top cover (See sec-
tion 5.1).
2. Open the left side cover.
3. Pull out the paper feed unit.
4. Lower the MP tray.
5. Remove the left side cover while releasing the 4
hooks from the printer f rame.
6. Remove the multi-purpose tray by sliding part A in
the direction indicated by the arrow.
Screw
Board
Fan
Cover
Left Side Cover
Part A
Multi-purpose Tray
Paper Feed Unit
Duct tube
Humidity
Sensor Case
Lower Rear Cover
Hook
Left Side
Cover
38
7. Turn the bushing 90 degrees counterclockwise.
Tab
Bushing
Bushing
Bushing
Rack
Paper
Support
Rack
Pinion Gear
Operation
Panel Cove r
Screw
Connector
Screws
Earth
Lead
Board
8. Remove the 2 bushings.
9. Separate the paper support assembly from the
holder.
10.Remove the pinion gear and racks (3 screws).
5. Removal and Replacement Procedures
Turn the bushing 90
degrees clockwis e or
counterclockwise.
5.3 Operation Panel Cover and Printer LCD Board
1. Remove the upper rear cover and top cover (See
section 5.1).
2. If the imaging unit is installed, remove it.
3. Open the front cover and remove the operation
panel cover assembly (3 screws).
4. Remove the 1 earth lead wires (1 screws).
5. Disconnect the connector.
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FS-5900C Service Manual
6. Remove the LCD board b racket (4
screws).
7. Remove the LCD board (6 screws).
8. Remove the operation button from the
operation panel cover.
9. Remove the lower operation panel cover
(2 screws).
Lower Operation
Panel Cover
Ground
Wire
LCD Board
Operation Button
Operation Panel Cover
Screw
5.4 Safety Interlock Switches and Toner Empty Sensor Board (T)
1. Remove the upper rear cover, top cover and operation panel cover (See section 5.1 and 5.3).
2. Remove the 3 screws and disconnect the connector on the toner empty sensor board.
3. Remove the toner empty sensor board.
4. Disconnect the 2 connectors from each of the 2 safety interlock switches.
5. Remove the 2 screws from each of the 2 safety interlock switches.
6. Remove the screw from each of the switch levers and switch lever.
Connector
Screw
Toner Empty
Sensor Board
Screw
Switch Lever
Safety Interlock Switch
Screw
Connector
Screw
Connector
Switch Lever
40
Screws
Connector
Screw
Safety Inter lo c k Switch
5. Removal and Replacement Procedures
Parts C
5.5 Front Cover and Bottom Front Cover
1. Open the front cover.
2. Remove the bottom front cover (3 screws).
3. Remove the front cover with hinges [4 screws (A)].
4. Remove the hinge assemblies from the front cover [4 screws (B)].
5. Remove the E-rings f rom the hinge shafts. The front cover hinges can now be separated from the front
cover hinge supporters.
Note:
E-ring
Hinge Shaft
E-ring
Screw (A)
E-ring
Hinge Shaft
E-ring
Screw (A)
Front Cover Hinge
Screw (B)
Front Cover
Hinge Supporter
Screw (B)
Front Cover
Hinge Supporter
Front Cover
The bottom front cover is latched by metal tabs
(Parts C below). When removing or reinstalling
this cover, it must be released from the tabs or
latched with the tabs.
Screw
Bottom
Front Cover
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FS-5900C Service Manual
5.6 Front Right Side, Rear Right Side and Lower Right Side Covers
1. Remove the bottom front cover (See section 5.5).
2. Remove the paper exit tray.
3. Remove the front right side cover (2 screws).
4. Remove the rear right side cover (2 screws).
5. Remove the lower right side cover (2 screws).
Rear Right Side Cover
Screw
Screws
Front Right Side Cover
Note:
The lower right side cover is latched by metal
tabs (Parts A below). When removing or reinstalling this cover, it must be released from the tabs or
latched with the tabs.
Lower Right Side Cover
Screws
Paper Exit Tray
Parts A
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5.7 Left Side Cover
Left Side Cover
5.7.1 Left Side Cover Re moval
1. Open the left side cover.
2. Remove the black strap by releasing the hooks.
3. Remove the left side cover by sliding it in the direc-
tion of arrows 1, 2.
5. Removal and Replacement Procedures
Hook
Strap
Hook
2
1
Left Side Cover
Spring
5.7.2 Left Side Cover Sub Assembly
1. Remove the tray cover by sliding it in direction of arrow while slightly deflecting part (A) of left side
cover in the direction of arrow. Release the tray cover from the tab on the left side cover as shown in circle A below.
2. Remove the paper chute (2 screws).
3. Remove the tray cover lever (1 screw).
4. Remove the 2 E-rings and 2 door hooks.
5. Remove the left side cover shaft and shaft spring by pulling out the door shaft.
When reinstalling the tray
cover and the tray spring,
Tray SpringTray Cover
AAAA
Tray Cover Lever
Left Side Cover
Tab
E-ring
install the spring as shown
below.
Tray Cover Tray Spring
Tray Cover
Part (A)
E-ring
Left Side Cover Shaft
Door Hook
Paper Chute
Door Hook
Shaft Spring
Screw
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FS-5900C Service Manual
5.8 Printer Main Control Board, HSYNC Board and Network Relay Board
5.8.1 Printer Main Board Removal
1. Remove the cable cover (2 screws).
2. Disconnect the connector by pulling the tab.
3. Remove the 2 screws, then pull out the printer main
board.
Note:
When replacing the printer main board, the current EEPROM (IC9) must be installed on the new
board. If the EEPROM is damaged, the color density calibration must be reset. Refer to section
7.2.
Screws
Pull out
Printer Main
Control Board
5.8.2 Printer Main Control Board Disassembly , HSYNC Board and Network Relay
Board
1. Remove the 3 screws from the connectors.
2. Separate the main board bracket from the printer main control board.
Main Control Board
Main Board Bracket
Screw
Screws
44
5. Removal and Replacement Procedures
Screw
Green Handle
Green Handle
Screw
Tabs
Square Opening
Paper Feed
Unit Cover
5.9 Paper Feed Unit
5.9.1 Paper Feed Unit Removal
1. Open the left side cover to access the paper feed unit.
2. Slide out the paper feed until it stops.
3. Push in on the tw o green tabs to unlock the paper
chute. Lift the paper chute until it catches, in the
open position.
4. Rotate the green handles on the transfer roller. Lift
out the transfer roller/waste bin (consumable) to
avoid toner spillage.
5. Remove the 2 screws.
6. Slide the paper feed unit off the rails.
5.9.2 Paper Feed Unit Board and MP Tray Paper Out/Registrati on Sensor Board
1. Remove the screw from t he paper feed unit
cover.
2. Remove the paper feed unit cover while releas-
ing the 3 hooks.
3. Remove the paper feed unit board (1 screw).
Registration Roller Clutch
Connector
3 Hooks
4. Disconnect the 4 connectors on the paper feed
Note:
unit board.
When reinstalling the paper feed unit
cover, the tabs of the registration roller clutch
must be aligned with the square opening.
Paper Feed
Unit Board
Paper Feed Unit
Cover Screw
Screws
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FS-5900C Service Manual
5. Remove the s e nsor case with the sensors after releas-
ing the 5 hooks in order
screwdriver below.
Flat Blade
Screwdriver
The MP tray paper out sensor, registration sensor and
MP tray Paper Out/reg. Sensor Board can now be
removed from the sensor case by releasing it from the
hooks.
1 to 5 using a flat blade
Opening of
Sensor Cover
Sensor Cover
Hook
Sensor Case
Sensor Case
Sensor Board
Connector
Registration Sensor Arm
MP Tray Paper Out
Sensor Arm
5.9.3 Transfer Roller Clutch, Transfer Roller Holder, Cleaning Roller Holder and
Registration Roller
1. Pivot the paper chute to an upright positio n.
2. Lift and remove the paper chute.
Bushing
46
Paper Chute
Bushing
5. Removal and Replacement Procedures
3. Remove the 3 E-rings and 2 springs from
the transfer roller cam shaft.
4. Remove the clutch, 2 bushings and
transfer roller cam shaft.
5. Remove the E-ring and gear from the
transfer roller holder shaft.
6. Remove the 2 E-rings, then slide out the
transfer roller holder shaft. The right
and left transfer holders can be removed.
Transfer Roller
Cam Shaft
E-ring
Bushing
Spring
Transfer Roller Holder
E-ring
Bushing
E-ring
Pickup Rollet
Clutch
E-ring
Pickup Rollet
7. Release the 2 springs from the spring
studs (located on back side of the paper
feed unit).
8. Rotate the cleaning roller holder up.
9. Lift and remove the cleaning roller
holder. The cleaning pressure roller and
2 bushings can be removed from the
holder.
Spring
Pull up
Cleaning Roller Holder
Stud
Gear
Pickup Rollet
Transfer Roller
Holder Shaft
E-ring
Pull up
Direction of
Rotation
Spring
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FS-5900C Service Manual
10.Remove the 2 springs and the plastic
clip.
11.Move the upper registration roller to the
right and remove.
12.Remove the 4 E-rings, 2 bushings and
registration roller clutch.
13.Remove the lower registration roller.
Upper Registration
Roller
E-ring
Springs
Plastic Clip
Bushing
E-rings
Bushing
5.9.4 MP Tray Retard Pad
Open the MP tray chute assembly with the
retard pad by sliding it in the direction of
arrow A.
Remove the retard pad by releasing the
hooks.
Lower Registration Roller
Arrow A
Registration Roller Clutch
MP Tray Chute Assembly
Spring
E-ring
Hook
48
MP Tray Chute Assembly
Retard Pad
5. Removal and Replacement Procedures
Hook
MP Tray Pickup Roller
Pickup Roller
Guide
5.9.5 MP Tray Motor, MP Tray Pickup Roller and MP Tray Pickup Roller Shaft
Note:
When reinstalling the pickup roller and cam to the MP tray pickup roller shaft, the rubber side of
the MP tray pickup roller, cams and STR sensor arm must be positioned as shown below.
Cams
5.9.5.1 MP Tray Pickup Roller
Release the hook of the pickup roller guide roller
1.
from the MP tray pickup roller shaft.
2. Remove the E-ring and slide the pickup guide
roller in the direction indicated by the arrow.
Pickup Roller Rubber
STR Sensor Arm
3. Remove the MP tray pickup roller.
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