Ricoh df64 Service Manual
AUTO REVERSE
DOCUMENT FEEDER
(Machine Code: A663)
30 March, 1999 MECHANICAL COMPONENTS
1. SPECIFICATIONS
Original Size and Weight: Thick original mode (default mode)
Use this setting for normal paper types
Maximum A3, 11" x 17"
Minimum B6 (sideways), 5
Weight 52 ~ 128 g/m2 (14 ~ 34 lbs.)
Thin original mode
Maximum A3, 11" x 17"
Minimum B6, 5
1/2
" x 8
Weight 40 ~ 128 g/m2 (11 ~ 34 lbs.)
Auto reverse mode
Maximum A3, 11" x 17"
Minimum B5, 5
1/2
" x 8
Weight 52 ~ 105 (14 ~ 27 lbs.)
Original Feed: Automatic feed - ADF mode
Manual feed one by one - SADF mode
Auto Reverse Feed - ARDF mode
1/2
1/2
1/2
" x 8
1/2
"
"
"
Original Table Capacity: 50 sheets at 80 g/m2 (21 lbs.)
Original Placement: Face up, first sheet on top
Original Separation: Feed Roller and Friction Belt
Original Transport: One flat belt
Power Consumption: 45 W
Power Source:
24 V ± 10% from the copier, 1.8 A
Dimensions (W x D x H): 610 x 507 x 130 mm (24.0" x 20.0" x 5.1")
Weight: Approximately 10.5 kg (23.2 lbs.)
1 to 1 Copying Speed
Capability
40 cpm
(A4/LT sideways)
Original Transport Speed 555 mm/s
Time Needed for Original
Replacement (A4
sideways)
590 ms
(thin original mode)
690 ms
(thick original mode)
Peripherals
A663-1
MECHANICAL COMPONENTS 30 March, 1999
2. COMPONENT LAYOUT
2.1 MECHANICAL COMPONENTS
12 3
11
10
9
1. Original Stopper
2. Press Lever
3. Original Table
4. Exit Rollers
5. Inverter Pawls
4
5
6
A663V502.WMF
8
7. Transport Belt
8. Pick-up Rollers
9. Pull-out Roller
10. Feed Roller
11. Friction Belt
7
6. Inverter Rollers
A663-2
30 March, 1999 ELECTRICAL COMPONENTS
2.2 ELECTRICAL COMPONENTS
15
14
17
16
A663V503.WMF
2
1
3
4
5
6
7
8
9
10
11
12
13
1. Original set sensor
2. Feed –in Cover Open Sensor
3. Stopper Solenoid
4. Indicator Panel Lamps
5. Feed-in Motor
6. Belt Drive Motor
7. DF Main Board
8. Inverter Solenoid
9. Feed-out Cover Open Sensor
10. Feed-out Motor
11. Feed-out Sensor
12. APS Start Sensor
13. DF Position Sensor
14. Original width Sensor-1
15. Original width Sensor-2
16. Original Width Sensor-3
17. Registration Sensor
Peripherals
A663-3
ELECTRICAL COMPONENTS 30 March, 1999
3. ELECTRICAL COMPONENT DESCRIPTION
Symbol Name Function Index No.
Motors
M1 Feed-in
M2 Belt Drive Drives the transport belt 6
M3 Feed-out Drives the feed-out and the inverter
Sensors
S1 Original Set Detects whether originals have been
S2
S3 Feed-out Cover
S4 Feed-out
S5 APS Start Informs the CPU that it is time to detect
S6 DF Position
S7 Original Width-1 Detects the width of the original 14
S8 Original Width-2 Detects the width of the original 15
S9 Original Width-3 Detects the width of the original 16
S10 Registration Determines original stop timing and
Solenoids
SOL1 Stopper
SOL2 I nvert er Energizes to invert the original when
PCB
PCB1 DF Main Board Controls all DF functions 7
Indicators (Lamps)
L1 Ready
L2 Auto Informs the operator that the auto feed
Feed-in Cover
Open
Open
Drives the feed-in system (pick-up feed
and pull-out rollers separation belt)
system
placed on the original table
Informs whether the feed-in cover is open
or not
Informs whether the feed-out cover is
open or not
Checks for original misfeeds and
determines original stop timing when in
auto-reverse mode
the original size (in platen mode)
Informs the CPU whether the DF is in the
up or down position
measures the length of the original
Lifts the original stopper and lowers the
feed-in lever to feed the set of originals to
the feed roller
copying two-sided originals
Informs the operator that the DF is in the
down position.
mode is available.
5
10
1
2
9
11
12
13
17
3
8
4
4
A663-4
30 March, 1999 ORIGINAL PICK-UP MECHANISM
4. DETAILED DESCRIPTIONS
4.1 ORIGINAL PICK-UP MECHANISM
[B]
[C]
[D]
[A]
[E]
A663D514.WMF
When an original is placed on the table, the leading edge is stopped by the stopper
[A], and the feeler activates the original set sensor [B]. The Insert Original indicator
light goes out and the DF informs the copier's CPU that the originals have been
set.
When the Print key is pressed, the stopper solenoid [C] activates to raise the
stopper to allow the originals to be fed in, and to lower the press lever [D] to press
the originals against the pick-up rollers [E].
An anti-static brush [F] is installed to eliminate static electricity caused during the
original pick-up process.
[F]
A663-5
Peripherals
SEPARATION AND PAPER FEED MECHANISM 30 March, 1999
4.2 SEPARATION AND PAPER FEED MECHANISM
[D]
[A]
[E]
[B]
A663D515.WMF
[F]
[C]
[D]
[E]
[A]
A663D516.WMF
[B]
Originals are separated using the friction belt [A] and the feed roller [B]. When the
copier sends a signal to the DF to feed in the original, the feed-in motor [C] starts
rotating (clockwise) to drive the pick-up [D], feed and pull-out [E] rollers. A one-way
bearing stops the friction belt from rotating. Originals are separated and fed in one
by one because the resistance of the stationary friction belt is greater than the
friction between pages of the original.
When the registration sensor [F] detects the separated first original, the feed-in
motor reverses (counter clockwise), and the drive is transmitted only to the pull-out
rollers due to a one-way bearing. In this condition, the pull-out rollers are still
rotating in the same direction, and they feed the original to the exposure glass. The
motor turns off when the trailing edge of the 1st original has finished passing over
the sensor.
To prepare the next original, the feed-in motor turns clockwise to separate the
second original and the motor turns off when the registration sensor detects the
second original. When it is time for the second original to be fed to the exposure
glass, the feed-in motor turns counter clockwise.
A663-6
30 March, 1999 FRICTION BELT DRIVE MECHANISM
4.3 FRICTION BELT DRIVE MECHANISM
[A]
[B]
[C]
A663D517.WMF
The feed-in motor [A] drives the friction belt [B] through timing belts and gears. The
one-way bearing allows the belt to rotate in the direction shown only when the
feed-in motor is rotating counterclockwise. (The feed-in motor rotates
counterclockwise when the original is passing over the registration sensor, and
only the pull-out rollers are rotating to feed the paper to the exposure glass.)
As a result of this operation, the part of the friction belt that contacts the feed roller
[C] or the original changes. This prevents multiple feeding or causing originals to
become dirty.
The reverse movement of the friction belt will not affect the next original because
the pressure of the press lever holds the originals in place.
Peripherals
A663-7
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