Ricoh ST23 User manual

RICOH ST23
SERVICE MANUAL

1. OVERALL MACHINE INFORMATION
1.1 SPECIFICATIONS
Configuration: Console
Number of Bins: 20 + proof tray
Paper for Proof Tray: Size: Maximum: A3, 11" x 17"
Minimum: A5, 51/2" x 81/2" (sideways)
Weight: 52 g/m2~ 160 g/m2, 14 ~ 43 lb
Paper for Bins: Sort/Stack Mode:
Size Maximum: A3, 11" x 17"
Minimum: A5, 51/2" x 81/2" (sideways)
Weight 52 g/m2~ 160 g/m2, 14 lb ~ 43 lb
Staple Mode:
Size Maximum: A3, 11" x 17"
Minimum: A4, 81/2" x 11"
Weight 64 g/m2~ 80 g/m2, 17 lb ~ 21 lb
Stapler Capacity: From 2 to 50 sheets (80 g/m2, 20 lb)
Bin Capacity: 1 sided copies 2 sided copies
Sort mode 70 sheets 50 sheets
Stack mode 50 sheets 35 sheets
(80 g/m2, 20 lb)
Proof Tray Capacity: 250 sheets (80 g/m2, 20 lb)
20 sheets (translucent paper)
Staple Position: a = b = 5 ±2 mm
Staple Time: Within 1.5 seconds/staple
Staple Replenishment: Cartridge exchange (5,000 pieces/cartridge)
Power Source: 1st sorter: 100 V (from copier)
2nd sorter:120 V (for U.S.A.)
220/230/240 V (for Europe)
ab
Sorter Stapler
OVERALL MACHINE INFORMATION 6 March 1992
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Power Consumption: Maximum: 0.2 kW
Dimensions: (1st sorter only) 580 x 828 x 1063 mm
(22.8" x 32.6" x 41.8")
(1st and 2nd sorter) 1120 x 828 x 1063 mm
(44.1" x 32.6" x 41.8")
Weight: 1st sorter: 98 kg, 216 lb
2nd sorter:90 kg, 198 lb
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1.2 MECHANICAL COMPONENT LAYOUT
12
1
11
10
9
8
7
6
5
4
3
2
1. Staple Unit
2. Proof Tray
3. Bins
4. Jogger
5. Bin Solenoids
6. Side Bar
7. Relay Gate
8. Diagonal Transport Rollers
9. Distribution Rollers
10. By-pass Tray Gate
11. By-pass Tray
12. Bin Gate
Sorter Stapler
OVERALL MACHINE INFORMATION 6 March 1992
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1.3 DRIVE LAYOUT
1. Diagonal Transport Drive Belt
2. Bin Drive Belt (1st to 10th)
3. Main Motor
4. Jogger Unit Drive Belt
5. Staple Unit
6. Side Bar Drive Belt
7. Proof Tray Exit Roller Drive Belt
8. Bin Drive Belt (11th to 20th)
1
6
5
4
7
8
2
3
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1.4 ELECTRICAL COMPONENT DESCRIPTION
Symbol Name Function Index No.
Motors
M1 Main Drives the diagonal transport unit, horizontal
transport unit, and distribution unit through
timing belts. 22
M2 Staple Unit
Positioning Drives the staple unit up or down to the appropriate bin. (dc stepper) 5
M3 Jogger Unit
Positioning Drives the jogger unit up or down to the appropriate bin. (dc stepper) 9
M4 Side bar Drives the side bar side to side according to
the paper size. (dc stepper) 1
M5 Grip Drives the gripper forward into the bin to grip
the copies and bring them to the stapling
position. (dc brush) 12
M6 Staple Feeds the staples and drives the stapler
hammer. (dc brush) 15
M7 Jogger Drives the jogger arm to align the copy. (dc
stepper) 18
M8 By-pass Tray Gate Drives the by-pass tray gate up or down to
switch the paper delivery tray. 36
Switches
SW1 Front Door De-energize the main motor and cuts 24 V
line when the front door is open. 8
SW2 Vertical Transport
Door De-energize the main motor when the vertical transport door is open. 6
SW3 Horizontal
Transport Door Informs the main board if the cover is open. 20
Circuit Boards
PCB1 Main Controls overall sorter stapler functions. 31
PCB2 DC Power Supply Convert ac voltage to 5 V dc and 24 V dc to
supply power to all dc components. 26
PCB3 Bin Solenoid
Control 1 Interfaces between the bin solenoids 1 ~ 10 and the main board. 28
PCB4 Bin Solenoid
Control 2 Interfaces between the bin solenoids 11 ~ 20 and the main board. 30
Solenoids
SOL1~20 Bin Opens and closes the bin gate to direct the
copies into the appropriate bin. 27
SOL21 Grip Opens and closes the bin gate to drive the
grippers to grip copies on the bins. 14
SOL22 Pressure Release Releases pressure of the brake roller when
the paper is fed lengthwise. 38
Sorter Stapler
OVERALL MACHINE INFORMATION 6 March 1992
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Symbol Name Function Index No.
SOL23 Relay Solenoid Turn the relay gate to transport the copy to
the 2nd sorter. 43
Sensors
S1 Entrance Detects paper jams at the entrance of the
diagonal transport unit. 37
S2 Registration Detects paper jams at the horizontal transport
unit. 21
S3 Proof Tray Exit Detects paper jams at the proof tray exit. 2
S4 Bin/Jam (LED) Detects if paper is in the bin.
Detects paper jams at the bin. 3
S5 Bin/Jam (Photo Tr) Detects if paper is in the bin.
Detects paper jams at the bin. 19
S6 Staple Unit H.P. Detects if the staple unit is in the home
position. 4
S7 Jogger Unit H.P. Detects if the jogger unit is in the home
position. 10
S8 Grip H.P. Detects if the gripper is in the home position. 11
S9 Hammer H.P. Detects if the staple hammer is in the home
position. 13
S10 Jogger H.P. Detects if the jogger arm is in the home
position. 17
S11 Side Bar H.P. Detects if the side bar is in the home position. 33
S12 Tray Gate H.P. Detects if the by-pass tray gate is in the home
position. 34
S13 Tray Gate Upper
Position Detects if the by-pass tray gate is in the upper position. 35
S14 Staple Unit
Position Detects the position of the staple unit. 32
S15 Paper Detect if copies are under the hammer. 7
S16 Staple End Detects if the staple is present. 16
S17 Diagonal Transport Door
Open
Detects if the diagonal transport door is open. 39
S18 Timing Supplies timing pulses to the main board. 29
S19 Relay Unit Cover
Open Detects if the relay unit cover is open. 41
S20 Relay Sensor Detects paper jam at the relay unit. 42
Capacitor
C1 Main Motor Protects the PCB’s from induced current. 23
Noise Filter
NF1 Noise Filter Removes electrical noise generated by the
copier and the sorter stapler. 25
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Symbol Name Function Index No.
Relay
RA1 Main Controls main power. 24
Transformer
TF1 2nd Sensor Detects paper jam at the relay unit. 42
Sorter Stapler
OVERALL MACHINE INFORMATION 6 March 1992
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1.5 BASIC OPERATION
Copies exiting the copier enter the sorter or the by-pass tray [A] depending
on the by-pass tray gate [B] position. In normal operation, copies are sent to
the sorter, if paper jams occur in the sorter, the remaining papers in the
copier are fed to the by-pass tray.
If sort/stack mode is not selected, copies are delivered to the proof tray [C]
through the diagonal transport unit [D], the horizontal transport unit [E], and
the distribution unit [F].
When sort/stack mode is selected, copies are delivered to the bins [G] in
order.
The copies in the bins are arranged by the jogger arm [H].
If staple mode is selected, when the last page of the original is delivered to
the 1st bin, the staple unit [I] starts stapling the copies in each bin.
The 1st sorter has capacity to hold 20 sorted copies.
If the 2nd sorter is installed next to the 1st sorter, an additional 20 sorted
copies can be sorted.
After the 20th copy is fed to the distribution unit of the 1st sorter, the relay
gate [J] moves to the upper position and the 21st copy is transported to the
2nd sorter. After the final copy of the designated number has passed under
the relay gate, the relay gate moves down to transport copies to the bins of
the 1st sorter again.
[F]
[H]
[G]
[C]
[I]
[A]
[B]
[D]
[E] [J]
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2. SECTIONAL DESCRIPTION
2.1 PAPER DELIVERY SWITCHING
Depending on the by-pass tray gate [A] position, paper fed from the copier
enters either the sorter or the by-pass tray [B].
The by-pass tray gate is driven by the by-pass tray gate motor [C]. Under
normal operating conditions, the by-pass tray gate is in the home position
(H.P. sensor [D] is actuated) to deliver copies to the sorter. If a sorter paper
jam occurs, the gate rotates on its shaft [E] until the upper tray gate position
sensor [F] is actuated and stops.
[A]
[D]
[F]
[C]
[E] [B]
[F]
Sorter Stapler
SECTIONAL DESCRIPTION 6 March 1992
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2.2 DIAGONAL TRANSPORT
Paper entering the diagonal transport unit is transported down to the
horizontal transport unit. The front side of the paper advances more than the
back side due to the front transport roller [A] being larger than the back
rollers. This causes the paper to skew as it enters the diagonal transport unit.
This skew prevents the diagonal transport guide [B] from catching the edge of
the copies.
The paper is then moved to the front by the diagonal transport rollers [C].
Where it is aligned as it is guided by the diagonal transport guide [B].
The brake roller [D] prevents the rear side of the paper from falling forward.
If the paper is traveling lengthwise, the pressure release solenoid [E] turns on
to prevent over skewing.
[D]
[E]
[C]
[B]
[A]
[E]
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2.3 SORTING
The distribution section has the distribution rollers [A], 20 bin gates, and 20
bin solenoids.
When a bin gate solenoid [B] is off, the return spring [C] holds the bin gate [D]
out of the paper path, allowing the copies to pass to the upper bin.
The appropriate bin gate solenoid turns on and opens the bin gate. The other
solenoids are off. The copies go to the bin [E] through the gate.
[B]
[E]
[C][A]
[D]
Sorter Stapler
SECTIONAL DESCRIPTION 6 March 1992
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2.4 PAPER JOGGING
Ordinarily, the side bar [A] is in the home position. It moves to within 10 mm
of the rear of the selected paper size. The side bar is driven by the side bar
motor [B] through the gears and a timing belt.
The jogger arm [C] home position is 10 mm in front of the paper.
After the paper passes the jam sensor, the jogger arm moves twice due to
the forward and reverse rotation of the jogger motor [D]. Jogger arm
movement is controlled through the link [E] and jogger bar [F].
The reverse rotation of the jogger motor prevents motor lock caused by an
overly stiff paper stack. Even if the overly stiff paper interferes with the jogger
arm movement, the arm returns to its home position via the reverse rotation
of the jogger motor.
[B]
[A]
[F]
[E]
[ D]
[C]
6 March 1992 SECTIONAL DESCRIPTION
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2.5 STAPLING
2.5.1 Gripper
The grip unit [A] grips and moves the jogged paper to the staple position and
returns the stapled paper to the bin.
The grip solenoid [B] and grip motor [C] are built into the grip unit. The motor
moves the grippers [D] back and forth, and the solenoid [B] controls paper
clamping.
When the grippers reach the paper in the bin, the grip solenoid turns on and
the grippers grasp the paper.
The lower gripper arm has a shorter stroke to prevent it from disturbing the
jogged paper in the bin.
Paper gripped by the grippers is moved by the grip motor into stapling
position.
Resetting the main PCB DIP SW101-1 to 101-4 adjusts the stapling position
(0.5 mm increments).
The stapled paper (held by the gripper arms throughout stapling) is returned
to its original position. The grip solenoid turns off to release the stapled
paper, and the gripper arms return to their original position.
The grip H.P. sensor [E] confirms that the grip unit has returned to its home
position.
[C]
[B]
[A]
[D]
[E]
Sorter Stapler
SECTIONAL DESCRIPTION 6 March 1992
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2.5.2 Stapler
The paper sensor [A] prevents stapler operation when there is no paper in
position. Also, it detects staple error if the paper sensor remains actuated
when the stapler finishes its operation.
The staple motor [B] drives the stapling mechanism and transporting of the
staples from the cartridge [C].
The hammer H.P. sensor [D] checks if the staple hammer [E] is in the home
position.
The staple end sensor [F] checks if staples are present.
[A]
[E] [D]
[B]
[C]
[F]
6 March 1992 SECTIONAL DESCRIPTION
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2.6 JOGGER UNIT POSITIONING
The jogger unit [A] vertical position is controlled by the stepper motor [B].
Depending on the rotation of the stepper motor [C], the jogger unit moves to
the appropriate bin.
When the main switch is turned on, the jogger unit will stop in its home
position. During sorter operation, the motor starts rotating when jogger
operation at any bin is complete. This lowers the jogger unit until it reaches to
the next bin and then the motor stops.
When jogger operation for a designated number of copies is complete, the
motor rotates to raise the jogger unit back to its home position.
[C]
[B]
[A]
Sorter Stapler
SECTIONAL DESCRIPTION 6 March 1992
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2.7 STAPLE UNIT POSITIONING
The staple unit [A] is hanging on the timing belt [B]. Due to the weight of this
staple unit, accurate positioning is ensured by using worm gear [C] which
transmits the staple positioning motor [D] rotation to the timing belt.
The bracket [E] guiding the staple unit has notches [F] which the staple unit
position sensor [G] senses.
Initially, the staple unit is beside the top bin. When stapling at the first bin is
completed, the staple unit positioning motor [D] energizes to move the staple
unit to the next bin where stapling is repeated.
When stapling at the last bin is completed, the motor [D] rotates to raise the
staple unit back to its home position. The staple positioning motor stops when
the staple unit home position sensor [H] is actuated.
Raising the staple unit requires more torque than lowering it. Thus the motor
speed when raising the staple unit will be approximately half of the lowering
speed.
[G]
[F]
[A]
[B]
[E]
[H]
[D]
[C]
6 March 1992 SECTIONAL DESCRIPTION
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2.8 1ST AND 2ND SORTER CONNECTION
When the 2nd sorter is connected, paper must be relayed from the 1st sorter
to the 2nd sorter. A relay solenoid [A] has been added to the 1st sorter for
this purpose.
A relay unit is also added to the 1st sorter to transport paper to the 2nd sorter.
The relay unit is driven by the 2nd sorter main motor [B].
The relay sensor [C] detects paper jams at the relay unit.
The relay unit cover [D] is provided to enable removal of misfed papers.
The photosensor [E] detects if the cover [D] is open.
[A]
[B]
[D]
[C]
[E]
Sorter Stapler
SECTIONAL DESCRIPTION 6 March 1992
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2.9 DOOR SWITCHES
Doors and guide plates are provided to enable removal of misfed papers.
Each door has a safety switch to detect opening and closing. These switches
also perform the jam reset function.
6 March 1992 SECTIONAL DESCRIPTION
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2.10 JAM DETECTION
2.10.1 Jam Detection Condition
The jam detection timing is determined by pulses from the timing sensor. The
diagram below illustrates the timing interval in which each sensor detects
paper jams in operation.
*1. Jam detection timing depends on the bin position
Bin No. Pulses Bin No. Pulses Bin No. Pulses
proof 470 7354 14 260
1436 8342 15 248
2422 9328 16 234
3408 10 314 17 220
4394 11 302 18 208
5382 12 288 19 194
6368 13 274 20 180
Staple failure is detected if the paper sensor is not de-energized after the
machine finishes returning the stapled paper to the bin.
300 pls 340 pls
400 pls
280 pls
436 pls
470 pls
280 pls
280 pls
OFF OFFOFF ON ONOFF ONON
Paper Exit Signal from Copier
Entrance
Sensor
Registration
Sensor
Exit
Sensor
Jam Detection Timing
Jam
Sensor *1
By-pass Tray
Gate Motor
Tray Gate HP
Sensor
Tray Gate Upper
Position Sensor
Main Motor
Stop Signal
from Copier Papers in copier exit
Sorter Jam
Sorter Stapler
SECTIONAL DESCRIPTION 6 March 1992
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