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DOCUMENT FEEDER
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31 October 1995 SPECIFICATIONS
1. SPECIFICATIONS
Original Size and Weight: – Thin original mode –
Maximum A3/11" x 17"
Minimum B6/51/2" x 81/2"
Weight 41 to 128 g/m2 (11 to 34 lb)
– Thick original mode –
Maximum A3 / 11" x 17"
Minimum B6 / 51/2" x 81/2"
Weight 52 to 128 g/m2 (14 to 34 lb)
– Auto reverse mode –
Maximum A3 / 11" x 17"
Minimum B6 lengthwise /
51/2" x 81/2" lengthwise
Weight 53 to 105 g/m2 (14 to 28 lb)
Original Feed: Automatic feed — ADF mode
Manual feed one by one — SADF mode
Original Table Capacity: 35 sheets / 64 g/m2 (17 lb)
Original Insertion: Face up. First sheet on top
Original Transport: One flat belt
Copy Speed: 20 copies/minute for A4/8 1/2" x 11" sideways
Power Consumption: 20 W
Dimensions (W x D x H): 670 x 460 x 103 mm (26.4" x 18.1" x 4.1")
Weight: Approximately 9.0 kg (19.916 lb)
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5
COMPONENT LAYOUT 31 October 1995
2. COMPONENT LAYOUT
– Mechanical Components –
23
1
4
6
10
9
8
1. Pulse Generator Disk 6. Inverter Pawl
2. Friction Belt 7. Inverter Roller
3. Pick-up Lever 8. Transport Belt
4. Original Table 9. Pick-up Roller
5. Exit Roller 10. Feed Roller
– Electrical Components –
5
4
3
6
7
8
9
2
1
7
A318V500.img
14
11
13
12
A318V501.img
1. Original Set Sensor 8. Lift Switch
2. Registration Sen sor 9. DF Main Board
3. Pulse Generator Sensor 10. Feed-out Motor
4. Original Width Sensor 11. Inverter Solenoid
5. Pick-up Solenoid 12. Feed-out Sensor
6. Belt Drive Motor 13. Original Select Switch
7. Indicator Panel 14. Feed-in Solenoid
2
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31 October 1995 ELECTRICAL COMPONENT DESCRIPTIONS
3. ELECTRICAL COMPONENT DESCRIPTIONS
Name Function Index No.
Motors
Belt Drive Motor A DC servomotor that drives the transport belt and
feed-in system (pick-up roller, feed roller, pull-out
roller, and relay roller).
Feed-out Motor A DC servomotor that drives the feed-out unit of the
DF.
Solenoids
Pick-up Solenoid Energizes to press the pick-up lever against the stack
of originals in preparation for original feed-in.
Feed-in Solenoid Turns on to engage the feed-in clutch so rotation is
transmitted to the feed roller, pull-out rollers, and relay
rollers.
Inverter Solenoid Energizes to invert the original when copying
two-sided originals.
6
10
5
14
11
Switches
Lift Switch Informs the CPU when the DF is lifted and also serves
as the jam reset switch for the DF.
Original Select Switch Selects thick original mode or thin original mode. 13
Sensors
Original Set Sensor Informs the copier CPU that originals have been
placed and causes the Insert Original indicator to go
out.
Registration Sensor Sets original stop timing and measures original length. 2
Original Width Sensor Determines the width of the originals. 4
Pulse Generator
Sensor
Feed-out Sensor Checks for original misfeeds and sets original stop
Printed Circuit Boards
DF Main Board Controls all DF functions. 9
Indicator Panel Board Contains operator indicators. 7
Generates pulses used to measure the original length. 3
timing when in auto reverse mode.
8
1
12
3
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OVERALL MACHINE CONTROL 31 October 1995
4. OVERALL MACHINE CONTROL
A318D500.wmf
The DF CPU monitors the input signals from the sensors and switch es, and
energizes the solenoids and the indicator LEDs directly. The belt drive motor
and the inverter motor are cont rolled by the DF CPU through their respective
driver ICs. The exchanged signals are shown in the tables on the next page.
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31 October 1995 OVERALL MACHINE CONTROL
1. DF → Copier
No. Signal Name Definition
1 Original Set Originals have been set on the original table
2 Copy Start Allows the copier to start the copy sequence
3 Lift Up The DF has been lifted
4 DF Misfeed A misfeed has occurred in the DF
2. Copier → DF
No. Signal Name Definition
1 Feed-in Requests the DF to feed in the original
2 Feed-out Requests the DF to feed out the original
3 Invert Original Requests the DF to invert the original
4 Auto Feed Shifts the DF to the auto feed mode
5 Original Stay The was attempted to use the DF but an original from the
previous copy run remains on the exposure glass
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BASIC OPERATION 31 October 1995
5. BASIC OPERATION
1. One-sided Original Feed
When an original is inserted face up into the DF, the Inse rt Orig inal indicator
light goes out and the DF informs the copier CPU that originals have been set.
When the Start key is pressed, the copier CPU sends the feed-in signal to
the DF. On receipt of this signal, th e DF ene rgize s the pick-up solen oid, the
feed-in solenoid, an d the belt drive motor in order to fe ed in the bot to m shee t
of the original stack onto the exposure glass. The pick-up solenoid and the
feed-in solenoid remain energized until the original’s leading edge reaches
the DF registration sensor. The belt drive moto r t urn s off short ly a ft er th e
original’s trailing edge passes the DF registration sensor.
While feeding the original, the DF registra tio n sen sor and the orig ina l width
sensor check the origina l size.
Just when the origina l trailing edge has passed the DF registra tio n sensor,
the DF CPU sends the copy start signal to th e copier.
When the scanner reaches the return position, the copier CPU sends the
feed-out and the feed-in signals to the DF CPU in order to exchange the
original with the next original. At this time, the scanner be gin s retu rnin g to the
home position.
When the scanner comes to th e ret urn position after scannin g th e last
original, the copier CPU only sen ds th e feed-out signal in order to feed out
the last original.
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31 October 1995 BASIC OPERATION
2. Two-sided Original Fee d
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 DF CPU also energizes the in vert er mot or an d th e inverter
solenoid a short time afte r t he origin al’s trailing edge has passed the DF
registration sensor. The belt drive motor continues to feed the origin al un til
the original’s leading ed ge passe s the fee d-out sensor. At this point the
inverter mechanism inverts the origin al, in prep aration for copying the back
side. Then the belt drive motor reve rses an d th e orig inal is fed towards the
left scale and is aligned against the sca le. The DF CPU se nds the copy sta rt
signal a short time after the origin al’s tra iling edge has passed the feed-out
sensor.
When the scanner reaches the return position, the copier CPU sends the
invert original signal to the DF CPU in order to make a copy of the front side.
The original is inverted in the same way as for back side copying.
3. Semi-automatic Document Feed
If a single original is inserte d int o the original table and cop ied , the DF shifts
to the semi-automatic feed mode and lights the Auto Feed ind icat or. The
Auto Feed indicator remains on for five secon ds after the copier main motor
stops. If another origina l is inserted within that five-second pe riod , it is
automatically fed and copied.
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ORIGINAL FEED 31 October 1995
6. ORIGINAL FEED
6.1 ORIGINAL PICK-UP
[B]
[C]
[D]
[A]
After the originals have been pla ced on the orig ina l t able, the originals
contact the feeler [A] of the original set sensor and cause the feeler to move
out of the sensor. The DF then sends the origin al set signa l to the cop ier
CPU to inform it that the DF will be used. When the Sta rt key is pressed, the
pick-up solenoid [B] is energized. The original stack is then pressed between
the the pick-up lever [C] and pick-up roller [D]. The rota tio n of the pick-up
roller advances the bottom original.
[A]
A318D501.img
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[B]
31 October 1995 ORIGINAL FEED
6.2 ORIGINAL SEPARATION
[B]
[A]
A318D502.img
[C]
[A]
A3618D503.img
The feed roller [A] and the friction belt [B] are use d to fee d in and sep ara te
the originals [C]. Only the bottom original is fed because the friction belt
prevents any other origin als fro m f eeding.
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
friction belt because the driving force of the feed roller is great er than the
resistance of the friction belt . The friction belt prevents multiple feeds
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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[E]
[C]
ORIGINAL FEED 31 October 1995
6.3 ORIGINAL FEED-IN MECHANIS M
[D]
[G]
[B]
A318D504.img
[A]
[F]
A318D505.img
The belt drive motor [A] drives the pick-up roller [B], the feed ro ller [C] , the
pull out roller [D], the relay roller [E], and tra nsp ort belt [F] via a feed clutch
and a gear train.
The pick-up and feed-in soleno ids are ene rgize d 10 0 milliseco nd s aft er th e
Start key of the copier is pressed. Then 100 milliseconds after the soleno ids
are energized, the belt drive motor starts turning. The pulse genera tor disc
[G] always turns when the belt drive motor is on.
Slightly after the original’s trailing edge passes the reg istra tio n sen sor, the
relay rollers and the transport belt sto p turnin g.
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31 October 1995 ORIGINAL FEED
This document feed er ha s two dif ferent ways of stopping orig inals at the
correct position on the exposu re gla ss. They are called the "thin original
mode" and the "thick original mode". The mode used is determin ed by the
original select switch [A].
[A]
A318D506.img
– Original Select Switch –
1. Thin Original Mode
The original is stopped at th e correct position on the exposure glass ba sed
on encoder pulse count. The belt drive mot or stops shortly after the original’s
trailing edge passes the DF registra tio n sensor. (Exact timing depends on
registration adjustme nt.) Thin original mode is selected at the factory.
2. Thick Original Mode
When thick original mode is selecte d, the belt drive mot or rema ins en erg ized
for an additional 30 encoder pulses as comp ared to thin original mode. Then,
the belt drive motor pauses and reverse s f or 21 pulse s. This forces the
original against the left scale and thu s align s the edge of the origin al with the
scale.
After the exposu re cycle is completed, the copier send s the fee d-o ut signal to
the DF CPU and the belt drive and feed-out moto rs start turning. At this time,
the copied original f ee ds out an d the next original feeds in.
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ORIGINAL FEED 31 October 1995
6.4 ORIGINAL SIZE DE TECTI O N
[B]
[A]
A318D507.img
The DF determines original size (bot h widt h and len gt h) th rou gh the use of
the original width sensor [A], registration sensor, and pulse generat or sensor
[B]. The original’s length is calculated by counting the number of pulses from
the pulse generator while th e reg istration sensor is on.
Original size detection is necessary for the feed-in /feed-out timing of the DF.
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31 October 1995 ORIGINAL FEED
6.5 ORIGINAL INVERSION MECHANI SM
[D]
[C]
[E]
[B]
A318D508.img
1)
[D]
[A]
A318D509.img
Two-sided originals are inve rte d in th e fe ed -ou t un it.
1) When the copier Start key is pressed, the two-side d original is fed into the
feed-in unit, passing over th e DF re gist ration sensor [A]. The fee d-o ut
motor [B] and the inverter sole no id [C] turn on 100 milliseconds after the
original’s trailing edge passes the registratio n sen sor. When the invert er
solenoid turns on, the inverter pawls [D] rotate counterclockwise.
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ORIGINAL FEED 31 October 1995
2) 4)
A318D510.img
3) 5)
A318D511.img
6)
A318D512.img
2) The original passes over the exposure glass and feeds into the fee d-out
unit.
3) The original is directed onto the exposure glass again by the inverter
pawls. The belt drive motor now reve rses 14 0 milliseco nd s aft er th e
feed-out sensor [E] turns on. The transport belt then moves the original
toward the left scale . Sligh tly be fo re the original reaches th e lef t scale,
the belt drive motor drops to half speed. This is to prevent damaging the
edge of the original against the left scale.
When the original’s leading edge reach es th e lef t scale , th e belt drive
motor stops. At the same time, the feed-out mot or an d th e inverter
solenoid turn off.
4) After the reverse side of the original has been exposed, the belt drive
motor, the feed-out motor, and the inverter solenoid turn on, and the
original is fed into the inverter section. (This is the same as step 2 above.)
5) The original is fed onto the exposure glass again as in step 3 above . The
front side of the orig ina l is th en co pie d.
6) After the front side of the original has been expo sed , the original is fed
out from the DF.
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31 October 1995 ORIGINAL FEED
6.6 ORIGINAL FEED- OUT ME CHANI SM
[A]
[D]
[C]
[B]
A318D513.img
The exit rollers [A] are driven by the inverter motor [B]. When the document
feeder receives the feed-o ut sig nal f rom the cop ier, the transport belt and the
exit rollers start turning simulta neou sly. The tran spo rt belt carrie s the origin al
to the inverter rollers [C] and the exit rolle rs take over the original feed-out .
When the original’s trailing edge passes the feed-out sen sor [D], the feed-out
motor drops to half of its normal spee d for 2 20 millise con ds an d then stops.
The lower speed preven ts un eve n stacking of originals. For A3 or double
letter size originals, th e feed-out motor speed does n ot chan ge , because it
would take too long to feed then out at the lower speed.
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ORIGINAL FEED 31 October 1995
6.7 BELT DRIVE MOTOR CIRCUIT
A318D514.wmf
A dc servomotor is used as the belt drive motor. The driver IC contro ls the
speed of the belt drive motor. The CPU sen ds th e speed dat a to the driver IC.
The driver IC sends a pulse-width-modulation (PWM) signal to the driver
circuit, which sends the mot or drive pulse s.
An encoder in the servomot or ha s two magnetic sensors that genera te two
pulse signals (phase A and B). The drive r I C monitors the belt speed and
direction with these pulse sig na ls and uses th e signals to regulate the mot or’s
speed.
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31 October 1995 ORIGINAL FEED
6.8 FEED-OUT MOTOR CIRCUI T
A318D515.wmf
The DF CPU sends the speed data (high or low) t o th e drive r IC a nd the
motor drive circuit. The moto r drive circuit creates a PWM signal and sends
the motor drive pulses to the feed-out motor.
The frequency generato r (FG) in the fee d-o ut motor makes a very low voltage
ac signal which is fed back to the driver IC. The drive r IC mo nit ors th e
frequency of this ac signal an d it regulates the motor spee d ba sed on th is
frequency.
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ORIGINAL FEED 31 October 1995
6.9 INPUT AND OUTPUT CIRCUITS
A318D516.wmf
The above devices are directly con tro lled and monit ored by the CPU. The
solenoids and indica to r p anel are energized with +24 volts. The sensors and
switches are energized with +12 volts or +5 volts.
To energize a solenoid or in dica tor, the CPU drops the conne cte d trigger line
from +24 volts to LOW. The CPU monitors t he inpu t line s of th e sen sors and
switches to determine when they are activated.
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[B]
31 October 1995 LIFT MECHANISM
7. LIFT MECHANISM
[D]
[G]
A318D517.img
[A]
[C]
[C]
[A]
[B]
A318D518.img
[F]
[E]
A318D519.img
A318D520.img
When the document feeder is ope ne d, the lift springs [D] provide enough
force to ensure that the document feeder does not fall onto the exposure
glass. When the document fe eder is clo sed , po int s "A" , "B", and "C" are
aligned and no such force is provided to the document feed er.
The lift switch [E] is actuated when the docu men t fe ed er is closed . The copier
then shifts to the document feeder mode. The lift switch also serves as th e
reset switch for document fe ed er misfe ed s.
When a book or very thick original (maximum thickness 60 mm) is copied, th e
DF acts as a cover for the original as shown in figure [F]. The lift switch is
turned off during th is cond ition, so the DF does not function. The tension of
spring [G] returns th e DF t o th e no rmal con dition after copying a thick orig ina l.
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ORIGINAL MISFEED DETECTION 31 October 1995
8. ORIGINAL MISFEED DETECTION
The registration sensor and the fe ed-out sensor are used for misfeed checks.
1. One-sided original
A318D521.wmf
If the registration sensor is not actu at ed wit hin 685 millise con ds af te r the belt
drive motor starts turning, the Origin al Misfe ed indicator lights (ON check).
If the registration sensor does no t tu rn of f with in 1, 25 0 milliseco nds, th e CPU
determines that there has been an original misfeed (O FF check). The
Original Misfeed indicato r also ligh ts if the feed-out sensor is not actu at ed
within 1,250 milliseconds after the feed-out motor starts turning (ON check)
or if the feed-out sensor does not turn off within 1,250 milliseconds after the
feed-out sensor is actuate d (OFF che ck).
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31 October 1995 ORIGINAL MISFEED DETECTION
2. Two-sided original
A318D522.wmf
The registration ON/OFF check is the same as for one-sided originals. Th e
inverter motor and the inve rte r solen oid turn on 100 milliseconds after the
registration senso r t urn s off. If the feed-out sensor is not actuated within
1,250 milliseconds after the feed-out motor starts turning, the Original
Misfeed indicator lights (ON check). The Origin al Misfeed indicator also lights
if the feed-out sensor does not turn off within 1,250 milliseconds after the belt
drive motor reverses (OFF check).
If a previous original remains on the expo sure glass af ter manual copying
and DF feed is attempted, the original misfeed indicat or ligh ts. When the DF
is lifted and the previous original is removed, DF copying is permitted.
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[2]
[9]
[10]
[17]
INSTALLATION PROCEDURE 31 October 1995
9. INSTALLATION PROCEDURE
9.1 ACCESSORY CHECK
Check the accessories and their quantities against the following list:
1. Original Table ........ .......... .. .................... .. .......... .. .................... .. ......1 pc
2. DF Mounting Bracket....................................... .. .......... .. ..................1 pc
3. Angle Stopper..................................................................................1 pc
4. Lift Switch Actuator..........................................................................1 pc
5. E Plate..... .................... .. .......... .. .................... .. .......... .. ....................1 pc
6. Spacer - 0.5 mm.............. .............................. .. .......... .. ....................6 pcs
7. Spacer - 0.2 mm.............. .............................. .. .......... .. ....................4 pcs
8. DF Harness Bracket (not used)........... .. .................... .. .......... .. ........1 pc
9. Bushing (not used) ..........................................................................1 pc
10. Toothed Wash er................................ .. .......... .. .................... .. ..........1 pc
11. Ground Screw - M4 x 6...................... .. .... .. .. .. .. .. .. .... .. .. .. .. .. .. .... .. .. .. ..1 pc
12. Hexagon Head Screw - M4 x 10 .....................................................4 pcs
13. Philips Screw with Flat Wash er - M4 x 5................. ............ ............4 pcs
14. Philips Pan Head Screw - M4 x 5 (round head).................... .. .... .. ..3 pcs
15. Philips Pan Head Screw - M4 x 5 (flat head)................... .. .. ............2 pcs
16. Philips Pan Head Screw - M3 x 5....................................................1 pc
17. Philips Pan Head Screw with Washe r - M3 x 5 (not used ).......... .. ..1 pcs
18. Stud Screw........ .. .. .... .. .. .. .. .. .. .... .. .. .. .. .. .. .... .. .. .. .. .. .. .... .. .. .. .. .. .. .... .. .. ..2 pcs
19. DF Test Sheet ................. .. .......... .. .................... .. .......... .. ................1 pc
[1]
[3]
[4] [5] [6] [7] [8]
[11] [12] [13] [14] [15] [16]
[19]
[18]
A318I500.img
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[22]
31 October 1995 INSTALLATION PROCEDURE
[20]
[21]
[23] [24]
[25] [26] [27]
A318I501.img
20. Philips Pan Head Screw - M5 x 10 (not used).................................2 pcs
21. DF Mounting Bracket (not used) ............... ............ .. ............ .. .. ........1 pc
22. DF Bracket (not used) ............................. .. .................... .. .......... .. ....1 pc
23. Sensor Actuator (n ot used)............ ............ .. ............ .. .. ............ .. .. ....1 pc
24. Sensor Actuator (n ot used)............ ............ .. ............ .. .. ............ .. .. ....1 pc
25. Philips Pan Head Screw - M5 x 12 (not used).................................2 pcs
26. Clamp..............................................................................................1 pc
27. Philips Pan Head Screw with Flat Washer - M4 x 8 .......................1 pc
NOTE: Optional DF Interface Kit Typ e B (A6 25 ) is necessa ry to inst all a
DF57 on the A173 model. This kit includes the following parts:
DF Interface Board...................................................................1 pc
Studs.........................................................................................2 pcs
M3 x 6 Hexagon Head Screws........... .. .. .. .. .. .. .. ........................4 pcs
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INSTALLATION PROCEDURE 31 October 1995
[A]
A318I502.img
NOTE: Connector (3P/Brown) [A ] on the DC harne ss assemb ly is not use d
with the A173 copier.
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31 October 1995 INSTALLATION PROCEDURE
9.2 INSTALLATION PROCEDURE
[A]
[D]
[B]
A318I504.img
A318503.wmf
"a"
[C]
A318I506.img
CAUTION
I
Before installing the DF, check that the power cor d is unplugge d.
1. Remove the platen cover [A] (4 screws).
[D]
A318I505.img
[E]
A318I507.img
2. Remove the rear cover (4 screws) and the right cover (4 screws).
3. Secure the DF mounting bracket [B] (4 screws [12] in the acce ssorie s list ).
4. Adjust the height of the DF mount ing bracke t in th e fo llowin g ord er:
1) Set the E plate [C] on the exposure glass as shown and measure the
clearance "a" between the DF mounting bracket and the E plate using
a scale.
2) If necessary, remove the DF moun tin g bra cket and insert spacers [D]
until the clearance "a" is betwee n 0 mm and 0.3 mm.
5. Remove the strip of tape [E].
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INSTALLATION PROCEDURE 31 October 1995
A318I508.img
[A]
A318I509.img
6. Mount the DF on the DF mounting bracket, aligning the holes in the DF
and the pins on the mountin g bra cket, then slide the DF to the lef t as
shown.
7. Secure the DF to the DF mounting bracket (4 screws [13 ] in th e
accessories list).
8. Secure the 2 stud screws [A] as shown in the diagram.
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[E]
31 October 1995 INSTALLATION PROCEDURE
[A]
[C]
[F]
[B]
[D]
A318I510.wmf
9. Attach the clamp [A] as shown (1 screw [27] in the accessories list).
10. Install the DF inte rfa ce bo ard [B] on the main board (2 studs [C] and 4
screws).
11. Connect the optics fiber cable connector (2P/Black) [D] and the dc
harness connector [E] to the DF interface board .
12. Secure the grounding wire [F] (1 scre w and too th ed washer).
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INSTALLATION PROCEDURE 31 October 1995
[A]
A318I511.img
[C]
[B]
A318I512.img
13. Remove the DF main PCB cover [A] and turn off DIP switch 101- 2.
NOTE: Make sure that DIP switch 101 -1 is on an d th e other switches
(101-2, 3 and 4) are off.
14. Install the angle stop per [ B] (2 screws [15 ] in th e accessories list).
15. Install the origina l tab le [C] .
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31 October 1995 INSTALLATION PROCEDURE
[A]
A318I513.img
[C]
[B]
A318I514.img
16. Adjust the height of the magnet catch es in th e fo llowin g ord er:
1) Remove the grip cover [A] (3 screws).
2) Loosen the screws of the magnet catches [B] (2 screws each).
3) Close the document fee de r and tighten the screws of the magnet
catches when the rubber stopper [C] contacts the exposure glass.
17. Reinstall the grip cover (3 screws).
NOTE: Open and close the docume nt fee de r wh ile con firming that the
magnet catches are makin g good contact.
18. Plug in the copier and turn on the main switch.
19. Inch version machines only:
Access SP mode and change the sett ing of SP1 from 0 to 1.
20. Check the original re gist ration. (See page 30.)
21. Reassemble the copier. (The DF harne ss f its in th e cut -out in the rear
cover as shown.)
22. Check the operatio n of the DF.
23. Position the original select switch to th in pape r mode (this is the norma l
position) and explain th e function of this switch to the customer.
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INSTALLATION PROCEDURE 31 October 1995
[A]
A318I515.wmf
Original Registrati on Adjustm ent
1. Make a copy of the test sheet in the platen mode (A4 width).
2. Confirm that the original select swit ch is in the thin origin al mod e and
make a copy in DF mode (A4 width).
3. Compare the registration of the copy in platen mode with that of DF
mode, and check that the difference is within 2.5 mm.
4. If the difference is more than 2.5 mm, remove the DF main PCB cover [ A]
(1 screw) and adjust VR102 to change the origina l-sto p timing.
NOTE: Turning VR102 clockwise results in the original sto pping later.
5. Make a copy of the test sheet in DF two-sided original mode.
NOTE: a) The test sheet should stop presse d ag ain st the left scale in DF
two-sided original mode.
b) The position of the original select swit ch does no t mat te r .
6. Compare the registration of the copy in platen mode with that of DF
two-sided original mode, and check that the difference is within 2. 0 mm.
7. If the difference is more than 2.0 mm, remove the DF main PCB cove r
and adjust VR103 to change the orig ina l-sto p timin g.
NOTE: a) The test sheet should stop presse d ag ain st the left scale in DF
two-sided original mode.
b) Turning VR103 clockwise results in the original sto pp ing later.
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[A]
31 October 1995 PREPARATION FOR TRANSPORTATION
10. PREPARATION FOR TRANSPORTATION
IMPORTANT
Before moving the document feeder, be sure to prepare it for
transportation as follows. The docume nt fe ede r ma y be badly dam age d
if it is moved without proper preparation.
[B]
1. Remove the original table [A].
[B]
A318I516.img
2. Secure the document feeder with strips of ta pe [B] as shown in the
illustration.
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REPLACEMENT AND ADJUSTMENT 31 October 1995
11. REPLACEMENT AND ADJUSTMENT
11.1 FEED-IN UNIT
11.1.1 Transport Belt Replacement
[C]
[A]
[D]
[B]
A318R500.img
1. Turn off the main switch and remove the grip [A] (3 screws).
2. Remove the DF main PCB cover [B] (1 screw, 1 connector).
3. Open the entrance guide [C] and remove the tran sport belt assembly [D]
(5 screws).
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31 October 1995 REPLACEMENT AND ADJUSTMENT
[C]
[B]
[A]
A318R501.img
4. Remove the 2 tension springs [A] and pull off the transport belt [B].
NOTE: a) When installing the tra nsport belt, make sure the belt lies
between the belt guide spacers [C].
b) When installing the tra nsport belt assembly, make sure th e
positioning pin correctly fits in the DF frame, and hold open the
exit guide to prevent the mylar strip from be comin g damaged.
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REPLACEMENT AND ADJUSTMENT 31 October 1995
11.1.2 Feed-in Unit Removal
[B]
[A]
A318R502.img
1. Turn off the main switch.
2. Remove the transport belt assembly. (See Transport Belt Replacement.)
3. Remove the belt drive motor cover [A] (4 screws).
4. Remove the feed-in unit [B] (4 screws, 8 connectors).
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31 October 1995 REPLACEMENT AND ADJUSTMENT
11.1.3 Pick-up Roller Replacement
[A]
[B]
[C]
[D]
A318R503.img
1. Turn off the main switch.
2. Remove the feed-in unit. (See Feed-in Unit Removal.)
3. Remove the lower entrance guide [A] (2 screws).
4. Remove the original set sensor assembly [B] (1 screw, 1 connector).
5. Remove the pick-up roller [C] (3 E-rings, 1 bushing, 1 gear).
NOTE: a) Be careful not to loose the pin [D].
b) When installing the roller, make sure the positioning pin is
correctly inserted in the cut-out of the roller.
c) When installing the gear, make sure th e fla t side of the gear is
facing away from the roller.
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REPLACEMENT AND ADJUSTMENT 31 October 1995
11.1.4 Feed-in Clutch Lubrication
[B]
[D]
[C]
[A]
A318R504.img
1. Turn off the main switch.
2. Remove the original set sensor assembly. (See Pick-up Roller
Replacement.)
3. Remove the feed-in solenoid lever spring [A].
4. Remove the pick-up roller assembly [B] (2 E-rings, 2 bushings).
5. Disassemble and lubricate the feed clutch [C] (1 E-rin g) with Mobil Temp.
78.
NOTE: a) Be careful not to loose the pin [D].
b) When installing the fe ed clutch, make sure the positionin g pin is
correctly inserted in the cut-out of the clutch.
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[D]
31 October 1995 REPLACEMENT AND ADJUSTMENT
11.1.5 Pick-up Solenoid Adjustment
[B]
[F]
[E]
A318R505.img
[C]
[A]
A318R506.img
1. Turn off the main switch.
2. Place several sheets of paper [A] over the expo sure glass area.
3. Lower the feed-in unit (see Fee d-in Unit Removal) without disconnecting
the eight connecto rs.
4. Turn on the main switch.
NOTE: When the main switch is turned on, the DPS1 01 setting on the
DF main PCB must be as follows:
1 = ON 3 = OFF
2 = ON 4 = OFF
This is so that the initial check sequence can take place.
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REPLACEMENT AND ADJUSTMENT 31 October 1995
5. Turn off DPS101-1 and 2, then turn on DPS101-3 and 4 [B].
6. Loosen the screw fixing the pick-up solenoid [C].
7. Place the 0.15 mm thickness gauge [D] between th e plu ng er an d the
solenoid.
8 While holding the solenoid , press SW101 [E] on the DF main PCB to
engage all DF solenoids.
9. Holding the solenoid securely, move it slowly towards the left , un til th e
plunger is attracted to the solenoid. Just at th is point, tighten the screw.
NOTE: Make sure the pick-up lever is touch ing the pick-up roller during
this adjustment.
10. Press SW 102 [F] to turn of f th e solenoids.
11. Turn off DPS101-3 and 4, then turn on DPS101-1 and 2.
12. Turn off the main switch and reassemble the DF.
13. Check the original feed-in operation.
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31 October 1995 REPLACEMENT AND ADJUSTMENT
11.1.6 Feed Roller Replacement
[C]
[A]
[B]
A318R507.img
1. Turn off the main switch.
2. Remove the lower entrance guide. (See Pick-up Roller Replacement.)
3. Loosen the front bracket [A] (2 screws).
4. Release the feed roller shaft [B] from the front bracket (1 E-ring, 1
bearing).
5. Remove the feed roller [C] (3 E-rings, 1 side roller, 1 pull-out roller).
NOTE: a) Take care not to lose the pin s.
b) When installing the fe ed roller, make sure the gear side of the
roller faces the front (see illustration).
c) When installing the side and pull-ou t rolle rs, make sure the pins
are correctly inserted in the cut -ou ts of the rollers.
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[D]
REPLACEMENT AND ADJUSTMENT 31 October 1995
11.1.7 Feed-in Solenoid Adjustment
[B]
[C]
[A]
A318R508.img
1. Turn off the main switch.
2. Place several sheets of paper [A] over the expo sure glass area.
3. Lower the feed-in unit (see Fee d-in Unit Removal) without disconnecting
the eight connecto rs.
4. Check that DPS101 is set for the normal mode (1 = ON, 2 = ON, 3 =
OFF, 4 = OFF).
5. Turn on the main switch.
6. Turn off DPS101-1 and 2, then turn on DPS101-3 and 4 [B].
7. Loosen the 2 screws securing the feed-in solenoid [C] .
8. Press SW101 on the DF main PCB (to engage all DF solenoids) and
adjust the position of the solen oid until the gap [D] (see illustration) is
within 1.0 – 2.0 mm.
9. Press SW102 on the DF main PCB to turn off all DF solenoids.
10. Turn off DPS101-3 and 4, then turn on DPS101-1 and 2.
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31 October 1995 REPLACEMENT AND ADJUSTMENT
11.1.8 Friction Belt Replacement
[A]
[B]
[C]
A318R509.img
[D]
1. Turn off the main switch.
2. Remove the seal cover [A] on top of the DF cover.
3. Remove the friction belt assembly [B] (1 screw).
4. Remove the friction belt [C] (2 springs, 1 pin).
NOTE: a) When installing the friction belt assembly, make sure the
friction roller [D] is set in the corre ct position (see illustration).
b) If the seal cover becomes dirty or def orme d, replace it with a
new one.
41
A318R510.img
Page 43
[A]
REPLACEMENT AND ADJUSTMENT 31 October 1995
11.2 FEED-OUT UNIT
11.2.1 Feed-out Unit Removal
A318R511.img
[C]
[B]
A318R512.img
1. Turn off the main switch.
2. Remove the DF grip [A] (3 screws).
3. Remove the feed-out motor cover [B] (4 screws).
4. Remove the feed-out unit [C] (4 screws, 3 connectors).
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31 October 1995 REPLACEMENT AND ADJUSTMENT
11.2.2 Inverter Solenoid Adjustment
[A]
[B]
[C]
[D]
A318R513.img
1. Turn off the main switch.
2. Place several sheets of paper [A] over the expo sure glass area.
3. Lower the feed-out unit (See Feed-out Unit Removal) without
disconnecting the th ree connectors.
4. Check that the DPS101 is set for the normal mode (1 = ON, 2 = ON, 3 =
OFF, 4 = OFF).
5. Turn on the main switch.
6. Turn off DPS101-1 and 2, then turn on DPS101-3 and 4 [B].
7. Loosen the screw securing the inverter solenoid [C].
8. Press SW101 on the DF main PCB (to engage all DF solenoids), and
adjust the position of the solenoid until the gap [D] (Se e illustrat ion) is
within 1.5 ± 0.5 mm.
9. Press SW102 on the DF main PCB to turn off all DF solenoids.
10. Turn off DPS101-3 and 4, then turn on DPS101-1 and 2.
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REPLACEMENT AND ADJUSTMENT 31 October 1995
11.2.3 DF Leading Edge Registration Adjustment
[A]
A318R514.img
1. Using the DF test chart, make a copy in the platen cover mode (A4 width).
2. Confirm that the original select switch [A] is in the thin mode and again
using the test chart, make a copy in the DF mode (A4 width).
3. Compare the leading edge registration of both copies, and check tha t th e
difference betwee n the two copies is within 2.5 mm.
4. If the difference is more than 2.5 mm, remove the DF main PCB cover (1
screw) and adjust VR102 on the DF main PCB until the leading edge
registration is within specifica tio n.
NOTE: Turning VR102 clockwise results in stoppin g the origina l la ter.
5. Using the DF test chart, make a copy in the DF two sided-o rigin al mode.
(Insert the origina l face down.)
6. Compare the leading edge registration with that of the plate n cover mode
copy, and check that the diff erence between the two copies is within 2.00
mm.
7. If out of specification , ad just VR10 3 on the DF main PCB un til the
leading edge registration is correct.
NOTE: a) The test sheet stops pressed against the left scale in DF
two-sided original mode.
b) Turning VR103 clockwise results in the original sto pp ing later.
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[B]
31 October 1995 REPLACEMENT AND ADJUSTMENT
11.3 BELT DRIVE MOTOR SPEED ADJUSTMENT
Normal
Setting
[A]
A318R515.img
[C]
A318R516.img
NOTE: The belt drive speed adjustment is require d whe n th e main board is
replaced.
1. Turn off the main switch.
2. Check that DIP switch 101 is set for the normal setting as follows:
101-1 101-2 101-3 101-4
ON OFF OFF OFF
3. Turn on the main switch and DIP switch 101-2 and -4.
4. While turning on the lift switch manually, adjust th e belt drive moto r speed
using VR101 [A] so that both the Insert Origin al ind icator [B] and Auto
Feed indicator [C] tu rn off.
NOTE: a) When the Insert Original indicator ligh ts, turn VR10 1 clockwise
to reduce the motor speed.
b) When the Auto Feed indica tor lights, turn VR101
counterclockwise to increase the motor speed.
c) Confirm that both indicators remain off for approximately 5
seconds in order to stabilize the mot or spe ed .
5. Turn off DIP switch 101-2 and -4.
NOTE: Do not use VR106. This variab le reg ister is for adjusting feed-out
motor speed. This is preset by th e ven do r.
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