Ricoh A571 User manual

ROLL FEEDER
(Machine Code: A571)

1. SPECIFICATIONS
Roll Paper Size: Width: 210 mm to 914 mm, 81/2" to 36"
Length: 150 meters
Diameter: Less than φ170 mm
Cut Size: –Preset Cut: 1189 mm, 841 mm, 594 mm,
420 mm, 297 mm
48", 36", 24", 18", 12"
46", 34", 22", 17", 11"
Up to 10 extra preset cut length can
be specified by SP23 ~ 32.
–Selected Length Cut: 245 mm to 2000 mm
(1 mm per step)
9.6" to 80" (0.1" per step)
Cutting Time: Within 0.80 second
Paper Transport Velocity: 50 mm/s
Repeat Quantity: 1 to 99
Control: Microprocessor
Power Source: +24 volts and +5 volts from the copier
Power Consumption: Maximum 110 W
Dimensions (W x D x H): 1,080 mm x 475 mm x 295 mm
42.71" x 18.70" x 11.61"
Weight: 29 kg, 63.8 lb
31 October 1994 SPECIFICATIONS
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2. MECHANICAL COMPONENT AND DRIVE
LAYOUT
1. Paper Feed Motor 5. Paper Feed Rollers
2. Idle Pulley 6. Paper Roll Spool
3. Timing Belt 7. Paper Roll
4. Cutter Motor 8. Cutter Unit
5
4
3
2
1
76
8
5
6
7
MECHANICAL COMPONENT AND DRIVE LAYOUT 31 October 1994
2

3. ELECTRICAL COMPONENT DESCRIPTIONS
The index numbers refer to the electrical component layout on the reverse
side of the Point to Point (Water proof paper).
Name Function Index No.
Motors
Paper Feed Drives all mechanical components except the cutter unit
(DC Stepper Motor). 43
Cutter Drives the cutter (DC Reversible Motor). 39
Switches
Door Indicates "Door Open" on the operation panel and
disables the key operation. 38
Left Cutter Detects whether or not the cutter is at the left home
position. 40
Right Cutter Detects whether or not the cutter is at the right home
position. 33
Sensors
Paper End Detects when the roll paper runs out. 35
Leading Edge Misfeed detector. Also detects the leading edge of the
paper to start the paper length pulse count. 42
Humidity Detects humidity and turns on the RF antihumidity
heaters while copying is not being done (if the humidity
is lower than 45%).
34
Printed Circuit Board
RF Control Controls all roll cutter unit functions in accordance with
copier CPU. 37
Others
Upper RF
Antihumidity Heater Removes humidity from the roll paper 41
Lower RF
Antihumidity Heater Removes humidity from the roll paper 36
31 October 1994 ELECTRICAL COMPONENT DESCRIPTIONS
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4. MECHANICAL OPERATION
4.1 BASIC OPERATION
The paper feed rollers [A], which are turned by the paper feed motor, feed
paper from the paper roll [B] through the cutter unit [C] to the paper leading
edge sensor [D] according to the signal from the copier. When the paper feed
motor starts, the copier CPU starts measuring the length of the paper. (The
paper length is measured by counting the number of steps as the paper feed
motor [stepper motor] turns.)
[C]
[A]
[B]
[D]
MECHANICAL OPERATION 31 October 1994
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After the leading edge of the paper reaches the exit rollers [A], the paper is
directed to the copier registration roller [B]. The registration roller stops
rotating after the registration sensor [C] detects the leading edge of the copy
paper. The copy paper is fed to the registration roller and stops to wait for the
original. At the appropriate timing after the original registration sensor is
activated by the original, the registration roller and roll paper feed motor start
to rotate. The copy paper starts to be fed again. Just before the cut length of
copy paper is fed, the speed of the roll paper feed motor is doubled. A paper
buckle forms at the trailing edge of the copy paper. When the paper reaches
the proper length, paper feed motor stops and the cutter unit cuts the paper.
During the time that paper feed motor has stopped, the registration roller
continues to feed the copy paper forward. The paper is cut during the time it
takes for the paper buckle to be pulled straight. This allows for a neat cut.
When the selected cut length is between 245 mm and 309 mm, the roll cutter
unit cuts the paper after the first rotation of the roll paper feed roller [D], as
the paper reaches the selected length before the registration roller starts to
rotate again. After the registration roller stops rotating, the roll paper feed
motor continues to rotate and a paper buckle forms at the trailing edge of the
paper. When the selected cut length is between 309 mm and 410 mm, the
roll cutter unit cuts the paper after the second rotation of the roll paper feed
roller. The paper buckle forms after the first rotation of the roll paper feed
motor, because the paper feed roller is still rotating after the registration roller
has stopped. The registration roller brake ensures that the very stiff types of
paper will not rotate the registration rollers when the paper buckles while it is
stopped at these rollers.
[C]
[B]
[A]
[D]
31 October 1994 MECHANICAL OPERATION
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4.2 CUTTER UNIT OPENING AND CLOSING MECHANISM
The gear [A] from the paper feed motor disengages from the cutter unit gears
[B] when the roll cutter unit is unlocked from the lower position and lifted up.
At this time, the cutter unit is locked at the upper position by the lock lever
[C], and the wheel [D] on the right side can be rotated manually to position
the leading edge of the roll paper.
[B]
[A]
[C]
[D]
MECHANICAL OPERATION 31 October 1994
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4.3 CUTTER OPERATION
The cutter unit uses a sliding rotary cutting blade [A] which is pulled past a
fixed blade by a drive wire. The rotary cutting blade allows the cutter unit to
cut paper in both directions. There are home position switches [B] at both
ends of the cutter unit. The cutter motor turns off, stopping the cutting action,
when the rotary cutting blade knob plate [C] turns off one of these switches.
[C]
[B] [C] [A]
31 October 1994 MECHANICAL OPERATION
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5. SERVICE TABLES
5.1 TEST POINTS
Function TP No.
GND TP903
VA(24 V) TP901
VC(5 V) TP902
5.2 BLOWN FUSE CONDITION
Component Unit Symptom
F901 (250V/1.0A) RF Main board The AC line for the
R/F antihumidity
heaters is cut. The
heaters are not
turned on.
SERVICE TABLES 31 October 1994
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6. INSTALLATION PROCEDURE
Roll Feeder (A571)
CAUTION: Unplug the copier power cord before starting the
following procedure.
Check the accessories and their quantities according to the following list:
Harness Cover .............................................................................2 pcs
Angle Bracket ...............................................................................1 pc
Spacer ..........................................................................................1 pc
Small Cap .....................................................................................1 pc
Screws - M4x8 .............................................................................8 pcs
Screws with Spring Washer - M4x8..............................................2 pcs
NOTE: When the Roll Feeder is installed on the copier, the table (A714) is
required.
31 October 1994 INSTALLATION PROCEDURE
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1. Lower the feet [A] so that the table does not move while the roll feeder is
being installed on the table and the copier.
NOTE: Do not place the roll feeder unit [B] onto the floor roughly, to
prevent the left and right covers from being damaged.
2. Remove the shipping tapes [C] and shipping cushions [D].
3. Remove the left and right covers [E and F] (3 screws each).
4. Remove the front cover [G] (2 screws) and lower the front cover arms [H]
to the down position.
[A]
[H]
[E] [G]
[H]
[F]
[B]
[C]
[C] [C]
[D]
INSTALLATION PROCEDURE 31 October 1994
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5. Open the copier paper path section and remove the copier left lower
cover [A] (2 screws), lower right front cover [B] (2 screws), lower right
middle cover [C], toner collection bottle [D], and rear cover [E] (2 screws).
6. Remove the small caps [F] from the copier rear cover using cutting pliers.
7. Remove the table rear cover [G] (4 screws).
[A]
[E]
[B] [C] [D]
[F]
[G]
31 October 1994 INSTALLATION PROCEDURE
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NOTE: Take care not to drop the manual feed table when removing the
bracket [A].
8. Remove the lower front cover [B] (2 screws), reinforcement plate [C] (1
screw), bracket [A] (4 screws) (which is changed by the harness), and the
manual feed table [D].
[D] [B]
[A]
[C]
INSTALLATION PROCEDURE 31 October 1994
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9. Mount the roll feeder unit on the copier (hook the mounting arms [A] on
both sides into the mounting rail [B]).
NOTE: Lift the unit by holding the plate [C] just under the size marks.
10. Install the angle bracket [D] and spacer [E] (4 screws).
11. Install the small cap [F] (2 screws).
[A]
[B]
[D]
[E]
[F]
[C]
31 October 1994 INSTALLATION PROCEDURE
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NOTE: To ensure grounding, tighten the screws for the ground wire until the
spring washers [A] are flattened.
12. Secure the grounding wire [B] (1 screw with spring washer) to the inside
of the table.
13. Run the roll feeder harness [C] and roll feeder heater harness [D] through
the holes in the table rear cover (right [E] and left [F])
14. Connect the roll feeder harness to the copier main board {2 connectors
[G] and 1 grounding wire [H] (1 screw with spring washer)}.
15. Connect the roll feeder heater harness connector [I] to the copier ac drive
board connector.
16. Install the harness covers [J] (1 screw each).
17. Reattach all the covers and manual feed table excluding the roll feeder
right cover.
[F] [E]
[B]
[A]
[D]
[C]
[H]
[J]
[G]
[I]
[A]
INSTALLATION PROCEDURE 31 October 1994
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18. Plug in the power supply cord and turn on the main switch.
19. Press the following keys on the operation panel:
Clear Modes key [A]
+ key [B]
- key [C]
Clear/Stop key [D]
20. Press the Clear/Stop key again and hold it down for longer than 3
seconds. The roll paper end and call service indicators will blink (SP
mode).
21. Select 40 using the + and - keys. Enter "1" by pressing the following keys.
Function Select key [E]
+ key
RF Select key [F].
22. Input values into SP modes 42 to 47 in accordance with the decal that is
attached to stuck on the right side plate.
23. Press the Clear Modes key 3 times to leave the SP mode.
24. Reattach the roll feeder right cover.
25. Check the roll feeder operation.
[B]
[A]
[D]
[F][E]
[C]
300 PRG.
No. 1100 PRG. No.
NORMAL XX 42 XX 45
HIGH (VELLUM) XX 43 XX 46
LOW (FILM) XX 44 XX 47
Length
Temperature
31 October 1994 INSTALLATION PROCEDURE
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7. REPLACEMENT AND ADJUSTMENT
7.1 EXTERIOR COVER REMOVAL
7.1.1 Front Cover Removal
1. Remove the front cover [A] (2 screws).
NOTE: If the screw holes for the front cover become worn by the screws,
extra holes are provided next to the original screw holes.
7.1.2 Left and Right Cover
NOTE: Be careful not to drop and damage the lower front cover [B].
1. Remove the left and right covers [C and D] (3 screws each).
NOTE: When reattaching the left and/or right covers, unlock and lift the
cutter unit for easier assembly.
[A]
[C]
[C]
[B]
REPLACEMENT AND ADJUSTMENT 31 October 1994
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7.2 CUTTER UNIT REMOVAL
1. Remove the roll feeder left and right covers.
2. Remove the 4 screws [A] of the cutter unit.
3. Take out the cutter unit [B] (1 connector [C]).
NOTE: When reinstalling the cutter unit, attach the cutter unit cover [D]
with the cutter unit.
[C] [D]
[A]
[A]
[B]
31 October 1994 REPLACEMENT AND ADJUSTMENT
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7.3 PAPER FEED ROLLER REPLACEMENT
1. Remove the cutter unit.
2. Unlock and lift the paper feed roller unit [A] using the release lever [B].
3. Remove the release lock lever [B] (2 screws).
4. Remove the feed roller guide plate [C] (6 screws).
5. Replace the paper feed roller [D] (2 allen screws [E], 1 gear [F], 1 snap
ring [G], 2 bushings [H], and 1 retaining ring [I]).
[A]
[B]
[C]
[I]
[H]
[D]
[H]
[G]
[E]
[F]
[E]
REPLACEMENT AND ADJUSTMENT 31 October 1994
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7.4 PAPER FEED MOTOR TIMING BELT TENSION
ADJUSTMENT
If the timing belt tension for the paper feed motor is not correct, the paper cut
length varies for each copy paper. Readjust the timing belt tension for the
paper feed if this occurs.
1. Remove the small cap [A] (2 screws).
2. Loosen the screw [B] and re-tighten it.
[A]
[B]
31 October 1994 REPLACEMENT AND ADJUSTMENT
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