Ricoh A763 User manual

BOOKLET FINISHER
(Machine Code: A763)

30 August, 2002 SPECIFICATIONS
A763-1
Options
1. OVERALL MACHINE INFORMATION
1.1 SPECIFICATIONS
Paper Size: Tray Modes Sizes
Proof tray A3 to A5, DLT to HLT
No staple mode A3 to A5, DLT to HLT
Top or
bottom A3 to B5 lengthwise, DLT to HLT
Shift tray Staple
Mode 2 staple A3, A4 sideways, B5 sideways,
DLT to HLT sideways
Booklet tray A3 to B5, DLT to LT
Paper Weight: Tray Weight
Stack mode 52 g/m2to 163 g/m2, 14 to 42 lb
Staple mode 64 g/m2to 80 g/m2, 17 to 21 lb
Saddle stitch mode 64 g/m2to 80 g/m2, 17 to 21 lb
64 g/m2to 128 g/m2, 17 to 34 lb (Cover sheet
only)
Paper Capacity (80 g/m2, 20 lb):
Tray Modes Paper size Capacity
A4-S, LT-S or shorter 150 sheets
Proof tray A4-L, LT-L or longer 75 sheets
A4-S, LT-S or shorter 1000 sheets
No staple A4-L, LT-L or longer 500 sheet
A4-S, LT-S or shorter 750 sheets
Shift tray Staple A4-L, LT-L or longer 500 sheets
1-5 sheets 25 sets
6-10 sheets 15 sets
Staple
tray One size
Mixed sizes 11-15 sheets 10 sets
(-L”: Lengthwise ,-S: Sideways)
Staple Capacity (80 g/m2, 20 lb):
Modes Paper size Total capacity
A4-S, LT-S or shorter 2-50 sheets
Staple A4-L, LT-L or longer 2-30 sheets
Saddle stitch 2-15 sheets
(-L”: Lengthwise, -S: Sideways)

SPECIFICATIONS 30 August, 2002
A763-2
Staple Position: Staple mode: 3 positions
1 staple: 2 positions (Front, Rear)
2 staples: 1 position
Saddle stitch mode: 1 position
Staple Replenishment: Cartridge
Staple: 5000 staples
Saddle stitch: 2000 staples
Power Source: 24Vdc (from copier)
Power Consumption: 60 W
Dimensions
(W x D x H): 800 x 728 x 980 mm, 31.5 x 28.7 x 38.6 inches
Weight: 45 kg

30 August, 2002 ELECTRICAL COMPONENT DESCRIPTION
A763-3
Options
1.2 ELECTRICAL COMPONENT DESCRIPTION
Symbol Name Function Index No.
Motors
M1 Entrance Drives the entrance roller. 49
M2 Transport Roller Drives the 1st and 2nd transport rollers. 47
M3 Buffer Roller Drives the buffer roller and the proof
tray exit roller. 48
M4 Jogger Moves the jogger fence. 44
M5 Stapler Moves the stapler unit. 52
M6 Staple Hammer Drives the staple hammer in the stapler
unit. 51
M7 Guide Plate Moves the upper exit guide plate up
and down. 46
M8 Exit Motor Drives the exit roller. 45
M9 Tray Lift Moves the shift tray up and down. 50
M10 Booklet
Transport Drives the relay roller and the positioning roller. 56
M11 Positioning
Plate Moves the positioning plate up and down. 54
M12 Shutter Guide Moves the shutter guide up and down. 55
M13 Booklet Jogger Drives the jogger fences. 57
M14 Front Stapler Drives the staple hammer in the front
stapler. 60
M15 Rear Stapler Drives the staple hammer in the rear
stapler. 53
M16 Folder Roller Drives the folder rollers. 59
M17 Folder Plate Moves the folder plate. 58
Sensors
S1 Entrance Detects copy paper entering the finisher
and detects misfeeds. 3
S2 Buffer Roller
Entrance Detects copy paper entering the buffer roller or proof tray exit guide and
detects misfeeds. 2
S3 Straight Path Detects copy paper passig under the
buffer roller and detects misfeeds. 21
S4 Staple Tray
Paper Detects copy paper in the stapler tray. 8
S5 Jogger HP Detects the home position of the jogger
rear fence. 19
S6 Stapler Unit HP Detects the home position of the stapler
unit. 16
S7 Staple Hammer
HP Detects the home position of the staple hammer. 14
S8 Staple Position Detects when the stapler is in the
stapling position. 14
S9 Upper Exit
Guide Detects the upper position of the upper exit guide. 4

ELECTRICAL COMPONENT DESCRIPTION 30 August, 2002
A763-4
Symbol Name Function Index No.
S10 Exit Guide
Motor Generates pulses to check the exit guide motor. 7
S11 Exit Checks for misfeeds at the shift tray. 18
S12 Exit Motor Generates pulses to check the exit
motor. 13
S13 Shift Tray Paper Detects copy paper on the shift tray. 20
S14 Shift Tray height Detects when the top of the copy paper
stack in the shift tray is at the correct
height. 1
S15 Shift Tray HP Detects the home position of the shift
tray. 12
S16
Lift Motor 1 Generates pulses to check the lift
motor, to control lift motor position, and
to detect the motion direction of shift
tray.
11
S17
Lift Motor 2 Generates pulses to check the lift
motor, to control lift motor position, and
to detect the motion direction of shift
tray.
10
S18 Proof Tray Exit Checks for misfeeds at the proof tray. 6
S19 Proof Tray Limit Detects when the paper stack height in
the proof tray is at its upper limit. 5
S20 Finisher Set Detects whether the finisher is installed
into the copier or not. 20
S21 Shutter Detects whether the shutter is closed or
not. 15
S22 Trailing Edge 1 Detects the relay roller release timing. 24
S23 Trailing Edge 2 Detects the relay roller release timing. 23
S24 Trailing Edge 3 Detects the relay roller release timing. 22
S25 Booklet
Entrance Check for paper misfeeds. 32
S26 Positioning
Plate Paper Detects copy paper in the positioning plate. 34
S27 Positioning
Plate HP Detects the home position of the positioning plate. 35
S28 Positioning
Roller Detects whether the positioning roller is released or not. 31
S29 Booklet Jogger
HP Detects the home position of the jogger fences in the booklet unit. 39
S30 Front Staple
End Detects staples in the cartridge of the front stapler. 43
S31 Rear Staple End Detects staples in the cartridge of the
rear stapler. 25
S32 Stapler Unit Set Detects whether the stapler unit is
installed or not. 26
S33 Shutter Guide
HP Detects the home position of the shutter guide. 33
S34 Folder Plate HP Detects the home position of the folder
plate. 29

30 August, 2002 ELECTRICAL COMPONENT DESCRIPTION
A763-5
Options
Symbol Name Function Index No.
S35 Folder Plate
Return Detects the return position of the folder plate. 30
S36 Folder Plate
Motor Generates pulses to check the folder motor and its position. 36
S37 Folder Roller
Position Detects the position of the folder roller. 28
S38 Folder Roller HP Detects the home position of the folder
roller. -
S39 Folder Roller
Motor Generates pulses to check the folder roller motor and its position. 39
S40 Booklet Exit Checks for misfeeds at the booklet tray. 41
S41 Booklet Tray
Paper Detects copy paper in the booklet tray. 40
S42 Booklet
Entrance Guide Detects whether the booklet entrance guide is opened or not. 27
S43 Lower Door Detects whether the lower door is
opened or not. 42
S44 Booklet Exit
Cover Detects whether the booklet exit cover is opened or not. 38
S45 Upper Door Detects whether the upper door is
opened or not. 16
Switches
SW1 Upper Cover
Safety Cuts the +24V for the motor. 77
SW2 Shift Tray Safety Cuts the +24V for the motor. 82
SW3 Shutter Position Cuts the +24V for the motor. 76
SW4 Upper Exit
Guide 1 Cuts the +24V for the motor. 80
SW5 Upper Exit
Guide 2 Cuts the +24V for the motor. 79
SW6 Shift Tray Upper
Limit Cuts the +24V for the lift motor. 81
SW7 Cartridge Set Detects the staple cartridge in the
stapler. 83
SW8 Staple End Detects the staples in the cartridge. 83
SW9 Thermo Detects the lift motor temperature. 78
SW10 Lower Door
Safety Cuts the +24V for the motor. 87
SW11 Booklet Entrance Guide
Safety
Cuts the +24V for the motor. 84
SW12 Booklet Exit
Safety Cuts the +24V for the motor. 88
SW13 Front Staple
Hammer HP Detects the home position of the staple hammer in the front stapler unit 86
SW14 Rear Staple
Hammer HP Detects the home position of the staple hammer in the rear stapler unit 85

ELECTRICAL COMPONENT DESCRIPTION 30 August, 2002
A763-6
Symbol Name Function Index No.
Solenoids
SOL1 Booklet Gate Drives the booklet gate. 72
SOL2 Buffer Roller
Entrance Gate Drives the buffer roller entrance gate. 71
SOL3 Proof Tray Gate Drives the proof tray gate. 70
SOL4 Buffer Roller
Exit Gate Drives the buffer roller exit gate. 68
SOL5 Transport Belt Moves the transport belt to the stopper. 69
SOL6 Paddle Releases the paddle stopper. 97
SOL7 Front Guide
Release Releases the front guide plate. 66
SOL8 1st Booklet Unit
Gate Drives the 1st booklet unit gate. 73
SOL3 2nd Booklet Unit
Gate Drives the 2nd booklet unit gate. 74
SOL4 Relay Roller Releases the relay roller. 75
PCBs
PCB1 Finisher Controls the upper unit. 61
PCB2
Lift Motor
Sensor Generates pulses to check the lift motor, to control lift motor position, and
to detect the motion direction of the
shift tray.
63
PCB3 Booklet Unit Controls the booklet unit. 65
PCB4 Trailing Edge
Sensor Detects the relay roller release timing. 64
Others
HR1 Stapler Interface Interfaces the stapler and the finisher
board. 62

30 August, 2002 MECHANICAL COMPONENT LAYOUT
A763-7
Options
1.3 MECHANICAL COMPONENT LAYOUT
1. Shutter
2. Shift Tray
3. Lower Exit Roller
4. Upper Exit Guide
5. 2nd Transport Roller
6. Proof Tray
7. Buffer Roller Exit Gate
8. Buffer Roller
9. Proof Tray Gate
10. Buffer Roller Entrance Gate
11. Booklet Gate
12. 1st Transport Roller
13. Stapler Unit
14. Transport Belt
15. Booklet Unit Entrance Roller
16. 1st Booklet Unit Gate
17. 2nd Booklet Unit Gate
18. Anvil
19. Folder Plate
20. Positioning Plate
21. Shutter Guide
22. Booklet Tray
23. Exit Guide
24. Positioning Roller
25. Folder Roller
26. Relay Roller
27. Booklet Stapler Unit
A763V500.WMF A763V501.WMF
1
2
3
4
5 6
8
7
9
11
10
12
13
14 21
20
19
18
17
16
15
27
26
25
24
23
22

JUNCTION GATE MECHANISM 30 August, 2002
A763-8
2. DETAILED DESCRIPTIONS
2.1 JUNCTION GATE MECHANISM
2.1.1 SHIFT TRAY MODE
A4/LT sideways or shorter
The booklet gate [A] and buffer roller entrance gate [B] are closed and the copy
paper goes directly to the shift tray [C].
Longer than A4 sideways
The booklet gate, proof tray gate [D], and buffer roller exit gate [E] are closed, and
the buffer roller entrance gate is opened. The copy paper passes through the buffer
roller [F]. This paper path creates a distance between copies.
A763D564.PCX
A763D565.PCX
[A]
[B]
[C]
[D]
[E]
[F]

30 August, 2002 JUNCTION GATE MECHANISM
A763-9
Options
2.1.2 PROOF TRAY MODE
The booklet gate [A] is closed. The buffer roller
entrance gate [B] and proof tray gate [C] are
closed. The copy paper goes to the proof tray [D].
2.1.3 BOOKLET STITCH MODE
The booklet gate is opened and the copy paper
goes to the booklet unit.
A763D101.WMF
A763D102.WMF
[A]
[B]
[C]
[D]

PRE-STACK MECHANISM 30 August, 2002
A763-10
2.2 PRE-STACK MECHANISM
This mechanism improves productivity in staple mode and shift mode.
During stapling, the copier has to wait. This mechanism reduces the wait by
holding the first two sheets of a job while the previous job is still being stapled. It
only works during the second and subsequent sets of a multi-set copy job.
The buffer roller entrance gate [A] and buffer roller exit gate [B] are opened. Then,
the 1st sheet of paper goes around the buffer roller [C].
When the 2nd copy [D] comes to the buffer roller, the buffer roller exit gate is
closed. The two sheets of paper go to the shift tray [E] or staple tray [F].
A763D566.PCX
A763D567.PCX
A763D568.PCX
[A]
[B] [C]
[E]
[F]
[D]

30 August, 2002 PAPER SHIFT MECHANISM
A763-11
Options
2.3 PAPER SHIFT MECHANISM
In sort and stack mode, only the 1st sheet of copy paper from the 2nd set is shifted
to the front to separate each set of copies.
When the copy paper comes into the staple tray [A], the upper exit guide [B] (which
contains the upper exit roller) opens. The paper switches back to the stopper [C].
Then the front guide release solenoid [D] turns on and the front guide [E] is
released, the shift motor moves jogger fence [F] to the front, and the copy paper
shifts to the front by 30 mm.
After copy paper has been shifted, the upper exit guide closes and the lower exit
roller [G] turns in the opposite direction to feed out the copy paper.
A
763D569.PC
X
A763D570.PCX
A763D104.WMF
[A]
[B]
[C]
[A]
[G]
[D]
[E]
[F]

PAPER POSITIONING MECHANISM 30 August, 2002
A763-12
2.4 PAPER POSITIONING MECHANISM
When the trailing edge of the 1st copy paper passes the 2nd transport roller [A], the
lower exit roller [B] stops and turns reverse. At the same time, the upper guide
plate motor turns on and opens the upper exit guide [C]. The copy paper is sent to
the stopper [D] by the lower exit roller and feed belt [E], and it is aligned the by
jogger motor.
The feed belt solenoid [F] turns on to move the feed belt to the stopper. This
function prevents excessive buckling of the paper between belt and stopper.
The paddles [G] send the paper to the stopper starting from the 2nd copy paper.
When the trailing edge of the 2nd copy paper passes the 2nd transport roller, the
paddle solenoid [H] turns on and the drive from the transport roller transmits to the
paddle shaft.
A763D105.WMF A763D106.WMF
A763D108.WMF A763D111.WMF
[C]
[A]
[B]
[D]
[E]
[F]
[G]
[G] [H]

30 August, 2002 STAPLER UNIT MOVEMENT MECHANISM
A763-13
Options
2.5 STAPLER UNIT MOVEMENT MECHANISM
2.5.1 DRIVE
The stapler motor [A] drives the
stapler unit drive gear [B] via a timing
belt. The stapler unit guide has a rack
gear [C]. The stapler unit moves along
the rack gear via the stapler unit [D]
drive gear.
2.5.2 MOVEMENT
Front and Rear Stapling
When the print key is pressed, the
stapler unit moves to the center. The
stapler unit moves to the front (or rear)
stapling position when the copy paper
comes into the finisher and stays until
the copy job finishes. It returns to home
position when the job is finished.
Tow-position Stapling
When the print key is pressed, the
stapler unit moves to the center. The
stapler unit moves to the rear stapling
position first and moves to the front
stapling position when stapling. Then it
goes back to the center until the copy
job finishes. It returns to home position
when the job is finished.
A763D107.WMF
A763D114.WMF
[A] [B]
[C]
[D]
[A]

STAPLER 30 August, 2002
A763-14
2.6 STAPLER
The staple hammer motor [A] drives the cam [B] via 2 gears [C, D] and the guide
roller on the staple hammer moves on the cam [D] . When the guide roller moves to
the highest position on the cam, the copy paper is stapled.
The stapler unit contains the cartridge set switch [E], staple end switch [F] and
staple position sensor [G].
The staple position sensor detects whether the staple sheet has come to the staple
unit or not.
A763D571.PCX
A763D110.WMF
A
763D109.WMF
[A]
[B]
[C]
[D]
[D]
[A] [E]
[F]
[G]

30 August, 2002 SHIFT TRAY MECHANISM
A763-15
Options
2.7 SHIFT TRAY MECHANISM
The guide gear [A] on which the shift tray is mounted is driven by the lift motor [B]
via gear [C].
The finisher board detects the direction of the motor rotation and motor position
using the lift motor sensors 1 [D] and 2 [E].
The lift motor contains a thermoswitch [F]. When it detects 73.5º C, the finisher
board stops the lift motor until its temperature reaches approximately 40º C.
The shutter position switch [G] cuts the lift motor power for safety when the upper
exit guide plate opens.
The shift tray height sensor [H] detects the distance between the sensor and the
top of the copy paper on the shift tray.
A763D576.PCX
A763D572.PC
X
[A]
[B]
[C]
[D]
[E]
[F]
[G]
[H]

BOOKLET UNIT GATE MECHANISM 30 August, 2002
A763-16
2.8 BOOKLET UNIT GATE MECHANISM
There are two junction gates [A] and three paper sensors [B] at the entrance area
of the booklet unit.
Depending on paper size, the appropriate gate solenoid(s) [C] are energized to
close the gate(s) in order to transport paper to the positioning plate [D] through a
suitable paper path.
This is done for the following reasons:
• To detect the trailing edge of paper with the correct sensor.
• To prevent the leading edge of the next sheet from hitting the trailing edge of the
previous sheets on the positioning plate.
A763D550.PCX A763D551.PCX A763D552.PCX
A763D563.PCX
[A]
[B]
[D]
[A]
[C]

30 August, 2002 BOOKLET UNIT GATE MECHANISM
A763-17
Options
The following tables show the relation between paper sizes and solenoids/sensors:
A3, 11" x 17" B4, 11" x 14" A4, 81/2" x 11"
1st Solenoid (Gate) OFF (Opened) ON (Closed) ON (Closed)
2nd Solenoid (Gate) OFF (Opened) OFF (Opened) ON (Closed)
A3, 11" x 17" B4, 11" x 14" A4, 81/2" x 11"
Trailing Edge Sensor 1 ON ON ON
Trailing Edge Sensor 2 OFF ON ON
Trailing Edge Sensor 3 OFF OFF ON

RELAY ROLLER AND POSITIONING PLATE MECHANISM 30 August, 2002
A763-18
2.9 RELAY ROLLER AND POSITIONING PLATE
MECHANISM
When the first sheet of paper comes to the booklet unit, the
booklet transport motor turns on to drive the relay roller [A].
The two relay rollers are out of contact with each other before
the paper comes. When the leading edge of the paper passes
trailing edge sensor 1, the relay roller solenoid is energized to
make the two relay rollers contact each other to transport the
paper to the positioning plate [B]. When the trailing edge of the
paper comes to the trailing edge sensor that the paper passes
last, the relay roller solenoid is de-energized. This solenoid
on/off cycle is done for each sheet of paper.
Before paper comes, the positioning plate moves up from the
home position to a position that is suitable for the selected
paper size in order that the middle of the paper just comes to
the stapling position.
The positioning plate motor drives the positioning plate using
pulse counts.
Only when the first sheet of paper reaches the positioning
plate, the positioning plate sensor [C] detects the paper.
A763D573.PCX
A763D574.PCX
A763D563.PCX
[B]
[A]
[A]
[B]
[C]

30 August, 2002 POSITIONING ROLLER MECHANISM
A763-19
Options
2.10 POSITIONING ROLLER MECHANISM
The booklet transport motor also drives the positioning roller [A] to vertically align
paper against the positioning plate [B].
The positioning roller is not round but elliptical in shape so that it moves away from
the paper while the paper is being horizontally aligned.
The positioning roller sensor [C] detects the actuator [D] on the roller shaft to
determine the rotation of the positioning roller. When the sensor is de-actuated, the
roller is away from the paper and the jogger fences [E] start moving.
A763D555.PCX
A763D554.PCX
[A]
[D]
[E]
[B]
[C]
[D]
[E]
[A]
[C]