Ricoh FT6645 Service Manual DF60
DUAL JOB FEEDER
(Machine Code: A376)
23 April 1993 SPECIFICATIONS
1. SPECIFICATIONS
Original Feed Mode: Automatic document fee d mod e
Automatic reverse document feed mode
Semi-automatic docume nt fee d mode
Mixed sized mode
Pasted original mode
Preset mode
Combine originals mode
Original Size, Weight and
Table Capacity:
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 version
LT/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 ❋❋●●●❍❋
8
1/2 x 14" lengthwise ❋❋●●●❍❋
8
1/2 x 11" lengthwise ❋❋●●●❍❋
1/2 x 11" sideways ❋❋●●●❍❋
8
5
1/2" x 81/2" lengthwise ❋❋❍❍❍❍❋
5
1/2" x 81/2" sideways ❋❋❋❋❋❋❋
8" x 13" (F) lengthwise ❋❋●●●❍❋
81/2 x 13" (F4)
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
2
Feeder
Dual Job
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SPECIFICATIONS 23 April 1993
Original Standard Position: Rear left
Original Separation: Fe ed and friction belt
Original Transport: One flat belt
Power Source: DC24V from the copier, 2.0A (ave rage)
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
1
23 April 1993 COMPONENT LAYOUT
2. COMPONENT LAYOUT
2.1 MECHANICAL COMPONENT LAYOUT
12
1. Friction Belt
2. Original Stopper
11
10
3
4
7. Inverter Pawl
8. Inverter Roller
5
9
6
72
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
3
Feeder
Dual Job
ELECTRICAL COMPONENT DESCRIPTION 23 April 1993
3. ELECTRICAL COMPONENT DESCRIPTION
Refer to the electrical compone nt layou t on the reverse side of the att ach ed
Point to Point for symbols and ind ex 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
23 April 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 In vert er Energizes to invert th e orig inal
when copying two sided
originals.
SOL2 St oppe r 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 fe ed 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.
6
17
20
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BASIC OPERATION 23 April 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, th e lea din g edge is stopp ed by
the stopper [A], and the feele r [B] activa te s the origin al set senso r. The Insert
Original indicator light goes out an d the DJF informs the copie r’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, th e sto pp er sole no id [C] activa tes 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 sho wn.
6
[B]
23 April 1993 BASIC OPERATION
[A]
[C]
[E]
[D]
[F]
[D]
[F]
[B]
[G]
[E]
The feed-in clutch [A] activat es when the DJF receive the feed-in signal.
200ms after the feed-in clutch act ivate, the feed-in motor feeds all originals to
the feed roller [B].
When the originals reach the fee d rolle r, th e sto pp er sole no id [C]
de-activates to lower the original sto pper [D] and to lift up the origina l press
rollers [E].
When the originals pass through (be twe en the sepa rat ion belt [F] and feed
roller), only the lowest orig ina l is sep ara te d an d fe d on to the exposure glass.
Until then, the feed-in motor rotates slowly (372mm/sec) to ensure prop er
original feeding. When the lea ding edge of the original activates regist rat ion
sensor - 2 [G], the feed-in clutch [A] turns off to reduce the mechanical load
and prevent the next original fro m f eeding. Also, the feed motor rotat es more
quickly (1250mm/sec).
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[A]
BASIC OPERATION 23 April 1993
[C][B]
When the leading edge of the original reaches the exposure glass, the
original is transported by the tra nsport belt [A] (belt drive motor turns on 200
ms after the start key is pressed).
When the trailing edge of the orig ina l passes through registration sen sor - 1
[B], the feed-in mot o r tu rns off. When the trailing edge of the original passes
through registratio n sen sor - 2 [C], the belt drive mot or gra du ally de crea ses
its speed to stop the origin al at the proper place on the exposure glass.
200ms after the belt drive motor turns off, the feed -in mot or tu rns on until the
next original activates reg istra tion sensor - 1 [B], the next original waits until
the first original copy jobs comple te . This op era tio n red uces 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 fe ed -ou t
motors turn on.
When the scanner reaches the return position after scanning the last original,
the copier’s CPU sends only the fe ed-out signal to feed-out the last orig inal.
If the original is smaller than A4 sideways, the origina l just copied is
transported to the rig ht sid e of the expo sure glass then waits until the next
original copying is completed . The n the previous original is delivered . This
operation also reduces the original fe ed-in time .
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23 April 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 fo r one-side d feed ;
however, the belt drive motor con tin ue s rota ting until the original reaches the
inverter section. The DJF CPU also energize the feed-out motor and the
inverter solenoid [A] fo r a short time.
After the inverter mechanism inverts the original (10 pulses after the feed-out
sensor [B] activates), the belt drive mot or reve rses an d th e orig inal is fed
towards the original scale. It is stoppe d at the correct posit ion on the
exposure glass, and the DJF CPU sends th e cop y 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 ma ke a cop y of th e fro nt sid e.
The original is inverted in the same way as for back side copying.
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BASIC OPERATION 23 April 1993
4.3 PRESET MODE
[E]
[B]
[D]
[C]
[F]
[A]
Two sets of originals for independen t cop y jobs can be set on the original tray
at the same time.
While the first set of originals [A] remains on the origin al tra y, bo th the origin al
set sensor feeler [B] and origin al fe ed senso r fee ler [C] are actuated. If the
second set of origina ls [D] ha s bee n set (st oppe d by the original stopper [E] )
and the first set of originals [A] are all fe d-in , th e orig ina l set sensor feeler [B]
is still actuated and only the original feed sensor is deactuated. There fo re,
the copier’s CPU recognizes tha t th e first jo b is comple ted.
If the second job is alrea dy pre set, the second set of originals is a ut oma tically
fed to the feed roller [F] in the same manner as the first set of origina ls was.
10
[Fig.2]
23 April 1993 BASIC OPERATION
4.4 COMBINE 2 ORIGINALS MODE
4.4.1 Overview
[Fig.1]
2 originals are fed onto the exposure glass at once in the comb ine 2 origin als
mode as shown in figure 1. This allows copying 2 originals onto one sheet of
paper automatically either in the full size mod e or in the red uction mode. If it
is used together with the dup lex mod e, 4 originals can be copied on a single
sheet of paper automatically.
If odd numbered originals are place d on the origin al ta ble, the first original is
placed on the exposure glass as sho wn in fig ure 2.
Only 1-sided originals can be used, and Auto Pa per Select (APS) and Auto
Reduce/Enlarge mod es cannot be used with this mode.
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BASIC OPERATION 23 April 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 a s the one -side d orig ina l
mode. When registration sensor-2 det ect s the trailin g edge of the first
original, the feed-in and the belt drive motors sto p once and the feed -in
clutch turns on again to pre pa re for the second original fee d.
[Figure 2]
As soon as the feed-in and the belt drive motor turn off, the belt drive
motor starts rotatin g in reve rse to align the first original against the
original scale. Then the belt drive mo tor t urn s off .
[Figure 3]
50ms after the feed-in motor turns off, the feed -in mot or tu rns on again at
a lower speed (372mm/sec) to feed the secon d orig ina l.
A few pulses (0 ~ 14 pulses: depends on the SP mode adjust men t) after
the registration senso r-2 is a ctiva ted by the leading edge of th e seco nd
original, the feed-in motor and the feed-in clutch turn off.
Figure 3
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23 April 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 sen sor-2 detects the trailing edge of the seco nd origin al,
the feed-in and the belt drive motors turn off and gradually th e belt drive
speed reduces to sto p the original at the pro pe r p lace on th e exposure
glass.
[Figure 5]
After the copying of th ese origin als is f inish ed , the belt drive motor and
the feed-out moto r t urn on to fee d ou t th e originals. 50mm before the
trailing edge of the first original de-activates th e feed-ou t sen sor, 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 d et ect the trailing edge of the second original, the
feed-out motor turns off.
Figure 5
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Feeder
Dual Job
ORIGINAL SEPARATION 23 April 1993
5. ORIGINAL SEPARATION
[E]
[F]
[B]
[C]
[A]
[B]
[D]
[E]
[C]
The drive from the feed-in motor [A] is transmitt ed to the pick-u p 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 sep ara te the origin als [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 fee ds
because the resistance of the frict ion belt is great er th an the frictio n be twe en
original sheets.
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