Ricoh df60 Service Manual

DUAL JOB FEEDER

(Machine Code: A376)

28 December 1993 SPECIFICATIONS

1. SPECIFICATIONS

Original Feed Mode: Automatic document feed mode

Automatic reverse document feed mode
Semi-automatic document feed mode
Mixed sized mode (Not applicable with the A109)
Pasted original mode (Not applicable with the
A109)

Preset mode

Original Size, Weight and
Table Capacity:

Combine originals mode

40.7

Paper Weight

Maximum number of

originals to be set

A3 lengthwise ❋ ❋ ● ● ● ❍ ❋
A4 lengthwise ❋ ❋ ● ● ● ❍ ❋

A4 sideways ❋ ❋ ● ● ● ❍ ❋

A5 sideways ❋ ❋ ❍ ❍ ❍ ❍ ❋
B4 lengthwise ❋ ❋ ● ● ● ❍ ❋
B5 lengthwise ❋ ❋ ● ● ● ❍ ❋

A4/A3 versionLT/DLT version

●: Mixed Original mode

❍: ADF mode, ARDF mode, SADF mode
❋: ADF mode, SADF mode

B5sideways ❋ ❋ ● ● ● ❍ ❋

F (8" x 13") lengthwise ❋ ❋ ● ● ● ❍ ❋

11" x 17" lengthwise ❋ ❋ ● ● ● ❍ ❋

1/2 x 14" lengthwise ❋ ❋ ● ● ● ❍ ❋

8
81/2 x 11" lengthwise ❋ ❋ ● ● ● ❍ ❋

1/2 x 11" sideways ❋ ❋ ● ● ● ❍ ❋

8

51/2" x 81/2" lengthwise ❋ ❋ ❍ ❍ ❍ ❍ ❋

1/2" x 81/2" sideways ❋ ❋ ❋ ❋ ❋ ❋ ❋

5

8" x 13" (F) lengthwise ❋ ❋ ● ● ● ❍ ❋

1/2 x 13" (F4)

8

lengthwise

8" x 10

Preset mode
ADF mode (1 sided originals mode)
ARDF mode (2 sided original(s) mode)
SADF mode

1/2" lengthwise ❋ ❋ ● ● ● ❍ ❋

8" x 10" lengthwise ❋ ❋ ● ● ● ❍ ❋

8" x 10" sideways ❋ ❋ ● ● ● ❍ ❋
10" x 14" lengthwise ❋ ❋ ● ● ● ❍ ❋
11" x 15" lengthwise ❋ ❋ ● ● ● ❍ ❋

g/m
11 lb 12.5 14 17 22 28 34

50 50 50 50 50 30 25

❋ ❋ ● ● ● ❍ ❋

46.5 52.8 64.0 81.4 104.7 128.0

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SPECIFICATIONS 28 December 1993

Original Standard Position: Rear left
Original Separation: Feed and friction belt
Original Transport: One flat belt
Power Source: DC24V from the copier, 2.0A (average)
Power Consumption: 70W
Dimensions (W x D x H): 680 x 508 x 116mm

(26.8" x 20.0" x 4.6")

Weight: 13kg (28.7lb)

2

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28 December 1993 COMPONENT LAYOUT

2. COMPONENT LAYOUT

2.1 MECHANICAL COMPONENT LAYOUT

1

12

1. Friction Belt

2. Original Stopper

11

2

10

3

4

7. Inverter Pawl

8. Inverter Roller

5

9

7

8

3. Press Roller

4. Side Fence

5. Original Table

6. Exit Roller

9. Transport Belt

10. Pick-up Rollers

11. Pull-out Roller

12. Feed Roller

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ELECTRICAL COMPONENT DESCRIPTION 28 December 1993

3. ELECTRICAL COMPONENT DESCRIPTION

Refer to the electrical component layout on the reverse side of the attached
Point to Point for symbols and index numbers.

Symbol Name Function Index

No.

Motors

M1 Feed-in Drives the feed-in system

(pick-up, feed, pull-out rollers,

separation belts)
M2 Belt Drive Drives the transport belt. 2
M3 Feed-out Drives the feed-out and the

inverter system.

Sensors

S1 DF Position Informs the CPU when the DJF

is being closed so that original

size detection sensors can

check the original size.

S2 Feed-out Checks for original misfeeds and

sets original stop timing when in

auto-reverse mode.

S3 Registration–2 Detects the leading edge of the

original to turn off the feed-in

clutch and to change the feed-in,

belt drive motors speed. Also

detects the original length.

1

5

7

8

10

S4 Original Width–3 Detects the original width. 11
S5 Original Width–1 Detects the original width. 12
S6 Original Width–2 Detects the original width. 13
S7 Registration–1 Detects the trailing edge of the

original to change the belt-drive

motor speed. Also, detects the

original length and original jam.

S8 Original Feed Detects if the originals reach the

feed roller or not.

S9 Original Set Detects if the originals are set on

the feed table.

4

14

15

16

28 December 1993 ELECTRICAL COMPONENT DESCRIPTION

Symbol Name Function Index

No.

S10 Pulse Count Counts the pulses generated by

the pulse generator disc to
determine the original length.

Solenoids

SOL1 Inverter Energizes to invert the original

when copying two sided
originals.

SOL2 Stopper Lifts the original stopper and

lowers the press roller to feed
the set of originals to the feed
roller.

SOL3 Separation Transmits drive to the separation

belts.

PCBs

PCB1 DF Main Board Controls all DJF functions. 3
PCB2 Indicator Panel

Contains operator indicators. 21

Board

19

4

9

18

Switches

SW1 Lift Informs the CPU when the DJF

is lifted and also serves as the
jam reset switch for the DJF.

SW2 Feed Cover Detects if the feed cover is

closed.

Clutches

MC1 Feed-in Transmits the feed-in motor

drive to the pick-up and feed
rollers, and to the separation
belts.

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17

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BASIC OPERATION 28 December 1993

4. BASIC OPERATION

4.1 ONE-SIDED ORIGINAL FEED

[A]

[A]

[B]

[C]

[D]

When an original is set on the DJF feed table, the leading edge is stopped by
the stopper [A], and the feeler [B] activates the original set sensor. The Insert
Original indicator light goes out and the DJF informs the copier’s CPU that
the originals have been set.

When the Start key is pressed, the copier’s CPU sends the feed-in signal to
the DJF. On receipt of this signal, the stopper solenoid [C] activates to raise
the stopper to allow the originals to be fed in, and to lower the press rollers
[D] to press the originals against the pick-up rollers as shown.

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[B]

28 December 1993 BASIC OPERATION

[A]

[C]

[E]

[D]

[F]

[D]

[F]

[B]

[G]

[E]

The feed-in clutch [A] activates when the DJF receive the feed-in signal.
200ms after the feed-in clutch activate, the feed-in motor feeds all originals to
the feed roller [B].
When the originals reach the feed roller, the stopper solenoid [C]
de-activates to lower the original stopper [D] and to lift up the original press
rollers [E].

When the originals pass through (between the separation belt [F] and feed
roller), only the lowest original is separated and fed onto the exposure glass.
Until then, the feed-in motor rotates slowly (372mm/sec) to ensure proper
original feeding. When the leading edge of the original activates registration
sensor - 2 [G], the feed-in clutch [A] turns off to reduce the mechanical load
and prevent the next original from feeding. Also, the feed motor rotates more
quickly (1250mm/sec).

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[A]

BASIC OPERATION 28 December 1993

[C][B]

When the leading edge of the original reaches the exposure glass, the
original is transported by the transport belt [A] (belt drive motor turns on 200
ms after the start key is pressed).
When the trailing edge of the original passes through registration sensor - 1
[B], the feed-in motor turns off. When the trailing edge of the original passes
through registration sensor - 2 [C], the belt drive motor gradually decreases
its speed to stop the original at the proper place on the exposure glass.
200ms after the belt drive motor turns off, the feed-in motor turns on until the
next original activates registration sensor - 1 [B], the next original waits until
the first original copy jobs complete. This operation reduces the original feed
in time.

When the scanner reaches the return position, the copier’s CPU sends the
feed-out and feed-in signals to the DJF CPU in order to exchange the original
for the next original.
When the DJF receives the feed-out signal, the belt drive and feed-out
motors turn on.
When the scanner reaches the return position after scanning the last original,
the copier’s CPU sends only the feed-out signal to feed-out the last original.

If the original is smaller than A4 sideways, the original just copied is
transported to the right side of the exposure glass then waits until the next
original copying is completed. Then the previous original is delivered. This
operation also reduces the original feed-in time.

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28 December 1993 BASIC OPERATION

4.2 TWO-SIDED ORIGINAL FEED

[A]

[B]

Unlike one-sided original feed, the back side of the original must be copied
first to keep the originals and copies in the correct order.

During original feed-in, the sequence is the same as for one-sided feed;
however, the belt drive motor continues rotating until the original reaches the
inverter section. The DJF CPU also energize the feed-out motor and the
inverter solenoid [A] for a short time.
After the inverter mechanism inverts the original (10 pulses after the feed-out
sensor [B] activates), the belt drive motor reverses and the original is fed
towards the original scale. It is stopped at the correct position on the
exposure glass, and the DJF CPU sends the copy start signal.
When the scanner reaches the return position, the copier’s CPU sends the
invert original signal to the DJF CPU in order to make a copy of the front side.
The original is inverted in the same way as for back side copying.

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BASIC OPERATION 28 December 1993

4.3 PRESET MODE

[E]

[B]

[D]

[C]

[F]

[A]

Two sets of originals for independent copy jobs can be set on the original tray
at the same time.
While the first set of originals [A] remains on the original tray, both the original
set sensor feeler [B] and original feed sensor feeler [C] are actuated. If the
second set of originals [D] has been set (stopped by the original stopper [E])
and the first set of originals [A] are all fed-in, the original set sensor feeler [B]
is still actuated and only the original feed sensor is deactuated. Therefore,
the copier’s CPU recognizes that the first job is completed.
If the second job is already preset, the second set of originals is automatically
fed to the feed roller [F] in the same manner as the first set of originals was.

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28 December 1993 BASIC OPERATION

4.4 COMBINE 2 ORIGINALS MODE

4.4.1 Overview

[Fig.1]

[Fig.2]

2 originals are fed onto the exposure glass at once in the combine 2 originals
mode as shown in figure 1. This allows copying 2 originals onto one sheet of
paper automatically either in the full size mode or in the reduction mode.

If odd numbered originals are placed on the original table, the first original is
placed on the exposure glass as shown in figure 2.

Only 1-sided originals can be used, and Auto Paper Select (APS) and Auto
Reduce/Enlarge modes cannot be used with this mode.

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BASIC OPERATION 28 December 1993

4.4.2 Operation

Figure 1

Figure 2

The DF operation in the combine 2 original mode is as follows:

[Figure 1]

The first original is fed in the same manner as the one-sided original
mode. When registration sensor-2 detects the trailing edge of the first
original, the feed-in and the belt drive motors stop once and the feed-in
clutch turns on again to prepare for the second original feed.

[Figure 2]

As soon as the feed-in and the belt drive motor turn off, the belt drive
motor starts rotating in reverse to align the first original against the
original scale. Then the belt drive motor turns off.

[Figure 3]

50ms after the feed-in motor turns off, the feed-in motor turns on again at
a lower speed (372mm/sec) to feed the second original.
A few pulses (0 ∼ 14 pulses: depends on the DIP switch combinations
102-1 ∼ -4) after the registration sensor-2 is activated by the leading edge
of the second original, the feed-in motor and the feed-in clutch turn off.

Figure 3

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28 December 1993 BASIC OPERATION

Figure 4

[Figure 4]

Soon after the feed-in motor turns off, both the feed-in and the belt drive
motors turn on again at the lower speed (372mm/sec).
After registration sensor-2 detects the trailing edge of the second original,
the feed-in and the belt drive motors turn off and gradually the belt drive
speed reduces to stop the original at the proper place on the exposure
glass.

[Figure 5]

After the copying of these originals is finished, the belt drive motor and
the feed-out motor turn on to feed out the originals. 50mm before the
trailing edge of the first original de-activates the feed-out sensor, both the
belt drive and the feed-out motor rotate at the lower speed to improve
original stacking.
48 pulses after, the belt drive motor turns off and 60 pulses after the
feed-out sensor detect the trailing edge of the second original, the
feed-out motor turns off.

Figure 5

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ORIGINAL SEPARATION 28 December 1993

5. ORIGINAL SEPARATION

[E]

[F]

[B]

[C]

[A]

[B]

[D]

[E]

[C]

The drive from the feed-in motor [A] is transmitted to the pick-up rollers [B]
and the feed roller [C] through the feed-in clutch [D] as shown. The feed roller
and the friction belts [E] are used to feed-in and separate the originals [F].
Only the bottom original is fed because the friction belt prevents any other
original from feeding.

Original feed starts when the feed roller starts turning and advances the
bottom original of the stack. The feed roller moves the original past the
separation belt because the driving force of the feed roller is greater than the
resistance of the friction belt. The friction belt prevents multiple feeds
because the resistance of the friction belt is greater than the friction between
original sheets.

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28 December 1993 SEPARATION BELT DRIVE MECHANISM

6. SEPARATION BELT DRIVE MECHANISM

[B]

[D]

[A]

[C]

Normally the separation belt is not driven. When the copy job is completed,
the separation solenoid [A] activates for 100ms. to transmit the drive from the
feed-in motor [B] to the separation belts [C] as shown.
By this operation, the part of the friction belt that contacts the feed roller [D]
or the original changes to prevent multiple feeding.

When the pasted original mode is selected, the separation solenoid turns on
to drive the separation belt in the same direction as the feed rollers.
This disables the separation function to reduce the friction between the
original surface and the separation belt.

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