Konica Minolta FS-501 User manual

SERVICE MANUAL
2004.09
Ver. 2.0
FS-501
THEORY OF OPERATION

After publication of this service manual, the parts and mechanism may be subject to change for
improvement of their performance.
Therefore, the descriptions given in this service manual may not coincide with the actual machine.
When any change has been made to the descriptions in the service manual, a revised version will be
issued with a revision mark added as required.
Revision mark:
• To indicate clearly a section revised, show to the left of the revised section.
A number within represents the number of times the revision has been made.
• To indicate clearly a section revised, show in the lower outside section of the correspond-
ing page.
A number within represents the number of times the revision has been made.
NOTE
Revision marks shown in a page are restricted only to the latest ones with the old ones deleted.
• When a page revised in Ver. 2.0 has been changed in Ver. 3.0:
The revision marks for Ver. 3.0 only are shown with those for Ver. 2.0 deleted.
• When a page revised in Ver. 2.0 has not been changed in Ver. 3.0:
The revision marks for Ver. 2.0 are left as they are.
1
1
1
1
2004/09 2.0 Adding the descriptions and correcting errors in
writing
2004/03 1.0 — Issue of the first edition
Date Service manual Ver. Revision mark Descriptions of revision
1

FS-501 Theory of Operation Ver2.0 Sep. 2004
i
I Outline
II Composition/Operation
CONTENTS
IOutline
1. Product specification ............................................................................................1-1
1.1 Type ................................................................................................................... 1-1
1.2 Functions ........................................................................................................... 1-1
1.3 Paper type ......................................................................................................... 1-1
1.3.1 Non-Sort ....................................................................................................... 1-1
1.3.2 Sort/Group....................................................................................................1-1
1.3.3 Sort staple/Group staple...............................................................................1-2
1.4 Stapling.............................................................................................................. 1-2
1.5 Sort and staple capacity .................................................................................... 1-2
1.5.1 Stacking with no stapling, with the same size paper (80g/m2) .....................1-2
1.5.2 Stacking with stapling ...................................................................................1-3
1.6 Machine specifications....................................................................................... 1-3
1.7 Operating environment ...................................................................................... 1-3
II Composition/Operation
1. Overall composition..............................................................................................2-1
2. Center cross section ............................................................................................2-2
3. Drive system ........................................................................................................ 2-3
4. Mechanical operations ......................................................................................... 2-4
4.1 Paper transport .................................................................................................. 2-4
4.1.1 Paper transport mechanism .........................................................................2-4
4.1.2 Paper switchback mechanism ......................................................................2-8
4.1.3 Roller/rolls spacing mechanism....................................................................2-9
4.2 Finisher tray ..................................................................................................... 2-10
4.2.1 Paper aligning mechanism .........................................................................2-11
4.3 Stapling............................................................................................................ 2-13
4.3.1 Stapling mechanism ................................................................................... 2-13
4.3.2 Stapling unit moving mechanism ................................................................ 2-14
4.3.3 Staple sheet empty detection .....................................................................2-15
4.4 Elevator tray ..................................................................................................... 2-16
4.4.1 Elevator tray ascent/descent mechanism ................................................... 2-16
4.4.2 Elevator tray shifting mechanism ................................................................ 2-17
4.5 Horizontal transport unit .................................................................................. 2-18
4.5.1 Paper transport mechanism .......................................................................2-19

FS-501 Theory of Operation Ver2.0 Sep. 2004
ii
I Outline
II Composition/Operation

FS-501 Theory of Operation Ver2.0 Sep. 2004 Product specification
1-1
I Outline
I Outline
1. Product specification
1.1 Type
1.2 Functions
1.3 Paper type
1.3.1 Non-Sort
1.3.2 Sort/Group
Type Single Staple Finisher
Installation Freestanding
Document Alignment Center
Supplies Staple Cartridge
Option Job separator (JS-601)
Modes Non-Sort/ Sort/ Group/Sort Staple/ Group Staple
Paper Type Paper Size Weight Tray Capacity Exit Tray No. of Sheets to
be Stapled
Plain paper
A6R to A3 Wide
5-1/2 × 8-1/2R/
5-1/2 × 8-1/2
to 12-1/4 × 18
60 to 256
g/m2
16 to 68 lb
250 sheets
1st Tray -
Thick paper
20 sheets
OHP Film
Translucent
paper
Envelope
Label paper
Letterhead
Paper Type Paper Size Weight Tray Capacity Exit Tray No. of Sheets to
be Stapled
Plain paper
B5R/B5 to
A3 Wide
7-1/4 × 10-1/2R/
7-1/4 × 10-1/2 to
12-1/4 ×18
60 to 209
g/m2
16 to 55-1/2
lb
1,000 sheets
(A4R, 8-1/2 ×
11R or
smaller);
500 sheets
(B4, 8-1/2 × 14
or larger)
Elevator Tray -
Thick paper

Product specification FS-501 Theory of Operation Ver2.0 Sep. 2004
1-2
I Outline
1.3.3 Sort staple/Group staple
*: 20 sheets if originals of high ID (Color Wise 3) is used.
*: 15 sheets when using Color Copy 90 paper.
*: 20 sheets when using Hammermill Laser Print90 paper.
1.4 Stapling
1.5 Sort and staple capacity
1.5.1 Stacking with no stapling, with the same size paper (80g/m2)
• Determined by the item whose value is reached first among number of stacked paper,
stacked height or mass of stack.
• Determined by the stacked height when stacking with stapling and no stapling mixed.
A. Number of stacked paper
B. Stacked height
C. Mass of stack
Paper Type Paper Size Weight Tray Capacity Exit Tray No. of Sheets to
be Stapled
Plain paper
B5R/B5 to A3
7-1/4 × 10-1/2R/
7-1/4 × 10-1/2
to 11 × 17
60 to 90 g/m
2
16 to 24 lb
Cover Mode
91 to 209
g/m2
24-1/4 to
55-1/2 lb
1,000 sheets
(A4R, 8-1/2 ×
11R or
smaller);
500 sheets
(B4, 8-1/2 × 14
or larger)
Elevator Tray
30 sheets✽
(60 to 80 g/m2,
16 to 21-1/4 lb)
Staple Filling Mode Dedicated Staple Cartridge Mode (3000 staples)
Staple Detection Available (Nearly Empty: 40 remaining staples)
Stapling Position Diagonal back side (45 °C) 1 point
Rear Parallel 1 point
Stapled Paper Size B5R/B5 to A3
8-1/2 × 11R / 8-1/2 × 11 to 11 × 17
Manual Staple None
FD No. of Sheets
A4R, 8-1/2 × 11R or smaller 1000 sheets
B4, 8-1/2 × 14 or larger 500 sheets
FD Height
A4R, 8-1/2 × 11R or smaller 150 mm
B4, 8-1/2 × 14 or larger 75 mm
FD Mass
A4R, 8-1/2 × 11R or smaller correspond to 1000 sheets
B4, 8-1/2 × 14 or larger correspond to 500 sheets

FS-501 Theory of Operation Ver2.0 Sep. 2004 Product specification
1-3
I Outline
1.5.2 Stacking with stapling
• (Reference: Actual value) Determined by number of Sets or number of Sheets based on
number of bindings.
A. Number of stacked paper
1.6 Machine specifications
1.7 Operating environment
Conforms to the operating environment of the main unit.
No. of Sheets to be Stapled No. of Sets No. of Sheets
2 pages 100 sets 200 Sheets
3 to 5 pages 80 sets 400 Sheets
6 to 10 pages 60 sets 600 Sheets
11 to 20 pages 40 sets 800 Sheets
21 to 30 pages 33 sets 1000 Sheets
Power Requirements DC 24 V (supplied from the main unit)
DC 5 V (generated by Finisher)
Max. Power
Consumption 63 W or less
Dimensions 538 mm (W) × 978 mm (H) × 637 mm (D)
21-1/4 inch (W) × 38-1/2 inch (H) × 25 inch (D)
Weight 38.1 kg (84 lb)

Product specification FS-501 Theory of Operation Ver2.0 Sep. 2004
1-4
I Outline
Blank page

FS-501 Theory of Operation Ver2.0 Sep. 2004 Overall composition
2-1
II Composition/Operation
II Composition/Operation
1. Overall composition
[1] 1st Tray [4] Lower Front Cover
[2] Upper Cover [5] Elevator Tray
[3] Upper Front Cover [6] Rear Cover
[1]
[6]
[5]
[4]
[3]
[2]

Center cross section FS-501 Theory of Operation Ver2.0 Sep. 2004
2-2
II Composition/Operation
2. Center cross section
[1] 1st Tray Exit Roll [8] Entrance Roll
[2] 1st Tray Exit Roller [9] Lower Path Transport Roll
[3] Upper Path Transport Roller [10] Lower Path Transport Roller
[4] Upper Path Transport Roll [11] Storage Roller
[5] Entrance Roller [12] Storage Roll
[6] Transport Rolls [13] Exit Roller
[7] Transport Rollers [14] Exit Roll
[5]
[1] [3]
[7]
[2]
[6]
[4]
[8]
[9]
[10]
[12]
[11]
[13] [14]

FS-501 Theory of Operation Ver2.0 Sep. 2004 Drive system
2-3
II Composition/Operation
3. Drive system
Stapling Unit Moving
Motor (M6-FN)
CD Aligning
Motor (M5-FN)
Shift Motor (M8-FN)
Lower Paddle Motor (M9-FN)
Elevator Motor (M7-FN)
Upper Entrance Motor (M4-FN)
Storage Roller/Rolls
Spacing Motor (M12-FN)
Entrance Motor (M1-FN)
Lower Entrance Motor (M2-FN)
Exit Motor
(M3-FN)
Upper Paddle
Motor (M15-FN)
Exit Roller/Rolls Spacing
Motor (M13-FN)

Mechanical operations FS-501 Theory of Operation Ver2.0 Sep. 2004
2-4
II Composition/Operation
4. Mechanical operations
4.1 Paper transport
4.1.1 Paper transport mechanism
A. Entrance section paper transport mechanism
• The Entrance Roller is turned to transport the paper into the Finisher as the Entrance
Motor is energized.
Paper
Entrance Roller
Entrance Motor (M1-FN)

FS-501 Theory of Operation Ver2.0 Sep. 2004 Mechanical operations
2-5
II Composition/Operation
B. 1st tray paper transport mechanism
• Paper transport to the 1st Tray takes place when the Finisher is in the Non-Sort mode.
• The Upper Path Transport Roller and 1st Tray Exit Roller turn to transport the paper into
the 1st Tray as the motor is energized.
• The 1st Tray Entrance Switching Solenoid and Upper/Lower Entrance Switching Solenoid
are energized to select the paper path into the 1st Tray.
1st Tray Exit Roller
Upper Path Transport Roller
Upper Entrance Motor (M4-FN)
Paper
1st Tray Entrance Switching Solenoid (SL2-FN)
Upper/Lower Entrance
Switching Solenoid (SL1-FN)
SL1
SL2

Mechanical operations FS-501 Theory of Operation Ver2.0 Sep. 2004
2-6
II Composition/Operation
C. Finisher tray paper transport mechanism
• Paper transport to the Finisher Tray takes place when the Finisher is in the Staple mode.
• As the Lower Entrance Motor is energized, the Storage Roller turns to transport the
paper toward the exit direction.
• By turning the Exit Motor backward, paper is transported onto the Finisher Tray.
• Either the upper paper path or lower paper path is used to transport paper onto the
Finisher Tray.
• The upper paper path is selected when the Upper/Lower Entrance Switching Solenoid is
energized, while the 1st Tray Entrance Switching Solenoid is deenergized.
• The lower paper path is selected when the Upper/Lower Entrance Switching Solenoid is
deenergized.
Finisher Tray
Lower Entrance Motor (M2-FN)
Storage Roller
Exit Motor (M3-FN)
Lower Path Transport Roller
Paper
1st Tray Entrance Switching Solenoid (SL2-FN)
Upper/Lower Entrance Switching Solenoid (SL1-FN)

FS-501 Theory of Operation Ver2.0 Sep. 2004 Mechanical operations
2-7
II Composition/Operation
D. Elevator tray paper transport mechanism
• Paper transport to the Elevator Tray takes place when the Finisher is in the Sort or Group
mode.
• As the motor is energized, the Exit Roller turns to transport the paper into the Elevator
Tray.
• Either the upper paper path or lower paper path is used to transport paper onto the
Elevator Tray.
• The upper paper path is selected when the Upper/Lower Entrance Switching Solenoid is
energized, while the 1st Tray Entrance Switching Solenoid is deenergized.
• The lower paper path is selected when the Upper/Lower Entrance Switching Solenoid is
deenergized.
Finisher Tray
Exit Motor (M3-FN)
Exit Roller
Elevator Tray
Paper
Upper/Lower Entrance Switching Solenoid (SL1-FN)
1st Tray Entrance Switching Solenoid (SL2-FN)

Mechanical operations FS-501 Theory of Operation Ver2.0 Sep. 2004
2-8
II Composition/Operation
4.1.2 Paper switchback mechanism
• When the last paper of the first print set is transported onto the Finisher Tray during a multi-print cycle
in the Sort Staple mode, the first paper of the subsequent print set, which is to be next transported,
undergoes a switchback sequence. The paper for the switchback is transported via the lower paper
path.
• The second paper of the second print set is placed over the paper which has undergone the switch-
back sequence. After the first print set has been fed into the Elevator Tray, the first and second sheets
of paper of the second print set are together transported onto the Finisher Tray.
• The switchback sequence of the paper is performed by turning the motor backward, which turns the
Lower Path Transport Roller and Storage Roller backward.
• The sheet of paper to be transported next to the one subjected to the switchback sequence is trans-
ported via the upper paper path.
• No switchback sequence is carried out if the interval between sheets of paper is wide as when using
paper of a large size.
<Three A4 originals for two print sets> ➀, ➁, ➂: Sheets of paper for the first print set
➀’, ➁’, ➂’: Sheets of paper for the second
print set
The sheets of paper for the first print
are transported via the upper paper
path onto the Finisher Tray.
The first sheet of paper of the second
print set is transported via the lower
paper path.
The first sheet of paper of the second
print set undergoes the switchback
sequence and stops. The second
sheet of paper stops as soon as its
trailing edge leaves the Entrance
Roller.
The first and second sheets of paper
of the second print set are transported
together, one on top of the other.
The Exit Rolls are pressed against the
Exit Roller to feed the sheets of paper
of the first print set out. At the same
time, the first and second sheets of
paper of the second print set are
transported toward the exit.
When the first print set is fed out, the
Exit Roller starts turning backward to
transport the first and second sheets
of paper of the second print set to the
Finisher Tray. The Exit Rolls leave the
Exit Roller.

FS-501 Theory of Operation Ver2.0 Sep. 2004 Mechanical operations
2-9
II Composition/Operation
4.1.3 Roller/rolls spacing mechanism
A. Storage roller/rolls spacing mechanism
• The Storage Roller briefly stops when the first sheet of paper completes a switchback
sequence during a multi-print cycle in the Sort Staple mode. If, however, paper measures
217 mm or more in the FD direction, the leading edge of the second sheet of paper
reaches the Storage Roller before the roller stops turning. The Storage Roller is therefore
raised up to allow a given clearance from the Storage Rolls.
• The Storage Roller is spaced from the Storage Rolls as a cam is turned by the corre-
sponding motor.
B. Exit roller/rolls spacing mechanism
• Paper needs to be temporarily transported to the Finisher Tray in the Staple mode, which
makes it necessary to raise the Exit Rolls to provide a given clearance from the Exit
Roller.
• After the stapling sequence has been completed, the Exit Rolls are lowered and pressed
against the Exit Roller so that the paper can be fed out.
• The Exit Rolls are spaced from the Exit Roller as a lever is moved to the right and left by
the cam which is rotated by the motor.
Storage Roller Home Position
Sensor (PC12-FN)
Storage Roller/Rolls Spacing
Motor (M12-FN)
Exit Rolls
Storage Roller
Lever
Exit Roller Home Position
Sensor (PC13-FN)
Cam
Exit Roller/Rolls Spacing
Motor (M13-FN)

Mechanical operations FS-501 Theory of Operation Ver2.0 Sep. 2004
2-10
II Composition/Operation
4.2 Finisher tray
• Sheets of paper are properly aligned and stapled together on the Finisher Tray before
being fed out into the Elevator Tray.
Elevator Tray
Finisher Tray