Ricoh dup3800c Service Manual

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DUPLEX UNIT

(Machine Code: G571)

Page 2

23 February, 2001 DUPLEX INVERTER UNIT

1. REPLACEMENT AND ADJUSTMENT

1.1 DUPLEX INVERTER UNIT

1.1.1 TOP COVER

1. External tray [A]

2. Open the duplex left cover [B]

3. Top cover [C] (! x 4)

1.1.2 DUPLEX CONTROL BOARD

[A]

[B]

[A]

[C]

G571R102.WMF

[B]

G571R104.WMF

1. Top cover (☛ 1.1.1 TOP COVER)

2. Duplex unit [A] (" x 1, # x 1)

3. Rear inner cover [B] (! x 2)

4. Duplex control board [C] (! x 4, " x 7)

G571-1

[C]

G571R105.WMF

Peripherals

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DUPLEX INVERTER UNIT 23 February, 2001

1.1.3 DUPLEX INVERTER MOTOR 1

[A]

G571R105.WMF

1. Top cover (☛ 1.1.1 TOP COVER)

2. Duplex unit (☛ 1.1.2 DUPLEX CONTROL BOARD)

3. Duplex control board bracket [A] (! x 2, " x 8)

[B]

G571R106.WMF

4. Duplex inverter motor 1 [B[ (! x 2, " x 1, 1 timing belt)

1.1.4 DUPLEX INVERTER MOTOR 2 AND SWITCH

[B]

[A]

G571R107.WMF

1. Top cover (☛ 1.1.1 TOP COVER)

2. Duplex unit (☛ 1.1.2 DUPLEX CONTROL BOARD)

3. Duplex control board bracket

4. Duplex inverter motor 2 [A] (! x 2, " x 1, 1 timing belt)

5. Duplex inverter unit switch [B] (! x 1, " x 1)

G571-2

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23 February, 2001 DUPLEX INVERTER UNIT

1.1.5 EXIT SENSOR 3 AND DUPLEX INVERTER SENSOR

1. Open the duplex inverter unit [A]

2. Exit sensor 3 [B] (" x 1)

3. Duplex inverter sensor [C] (! x 1, " x 1)

[A]

1.1.6 EXIT SENSOR 1 AND 2

1. Top cover (☛ 1.1.1 TOP COVER)

2. Open the duplex unit

3. Exit sensor 1 [A] (! x 1, " x 1, 1 bracket)

4. Exit sensor 2 [B] (" x 1)

[B]

[C]

G571R101.WMF

[A][B]

G571R103.WMF

Peripherals

G571-3

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DUPLEX FEED UNIT 23 February, 2001

1.2 DUPLEX FEED UNIT

1.2.1 DUPLEX DRIVE BOARD

[B]

[A]

G571R108.WMF

1. Open the front cover

2. Duplex feed unit [A] (! x 1)

3. Inner cover [B] (! x 1)

1. Duplex drive board [C] (! x 2, " x 3)

[C]

G571R111.WMF

1.2.2 DUPLEX FEED MOTOR

1. Duplex feed unit (☛ 1.2. 1 DUPL EX DRIVE BOARD)

2. Inner cover [A] (! x 1)

3. Duplex feed motor [B] (! x 1, " x 1, 1 timing belt)

[A]

[B]

G571R110.WMF

G571-4

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23 February, 2001 DUPLEX FEED UNIT

1.2.3 DUPLEX FEED SENSOR

[A]

G571R109.WMF

1. Duplex feed unit (☛ 1.2.1 DUPLEX DRIVE BOA RD)

2. [A] Duplex feed sensor (" x 1)

Peripherals

G571-5

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OVERVIEW 23 February, 2001

2. DETAILED DESCRIPTIONS

2.1 OVERVIEW

1 2

G571D101.WMF

1. Exit sensor 1

2. Junction gate

3. Duplex feed sensor

4. Duplex inverter sensor

5. Junction mylar 3

• For duplex printing, the second page (rear side) is printed first.

• To print on the second side, the duplex inverter unit (on the side of the machine)

inverts the paper from the fusing unit and feeds it to the duplex feed unit (inside the machine).

• The duplex feed unit feeds the inverted paper back to the paper feed section.

• When both sides have been printed, the duplex inverter unit feeds the paper out

to the finisher.

• If the mailbox or standard exit tray (on top of the machine) was selected to

receive the duplex copies, the print will not enter the duple x unit after the second side has been printed. The junction gate inside the printer directs it upwards to the selected tray.

• Duplex copies are not fed out to the external tray (on the left of the machine).

6. Junction mylar 2

7. Exit sensor 3

8. Junction mylar 1

9. Exit sensor 2

G571-6

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23 February, 2001 DUPLEX OPERATION

2.2 DUPLEX OPERATION

2.2.1 UP TO A4/LT(8

There are three sheets of paper in the paper feed path at the same time, using the interleave method.

Example: 8 pages. The number [A] in the illustration shows the order of pages. The number [B] in the illustration shows the order of shee ts of paper (if shaded, this indicates the second side).

[A]

⇒⇒6⇒⇒8⇒⇒5⇒

1 2 43 1 4 2 3

[B]

2.2.2 LARGER THAN A4/LT(8

There is only one sheet of paper in the paper feed path at one time. Example: 8 pages. The numbe r [A] in the illustration shows the order of pages. The

number [B] in the illustration shows the order of shee ts of paper (if shaded, this indicates the second side).

1/2

" X 11") LEF

1/2

" X 11") LEF

3142

G571D113.WMF

[A]

[B]

⇒⇒6⇒⇒8⇒⇒5⇒

1 2 4

31 42

G571D114.WMF

Peripherals

G571-7

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DUPLEX INVERTER UNIT 23 February, 2001

2.3 DUPLEX INVERTER UNIT

2.3.1 DRIVE

[B]

[C]

[D]

[A]

[E]

[F]

[G]

[H]

[I]

G571D104.WMF

The duplex inverter motor 1 [A] drives the paper exit roller 1 [B], paper transport roller [C], paper e xit roller 2 [D], and upper inverter roller [E].

The duplex inverter motor 2 [F] drives the exit roller 3 [G], paper exit roller 4 [H], and lower inverter roller [I].

G571-8

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23 February, 2001 DUPLEX INVERTER UNIT

2.3.2 FEED TO EXTERNAL EXIT TRAY (NON-DUPLEX MODE)

[B]

[A]

G571D106.WMF

This shows how the machine feeds paper through the duplex unit to the external tray [A], when duplex mode has not been selected.

NOTE: The paper cannot be fed out to the external tray if duplex printing is

selected.

The junction gate [B] directs the paper from the fusing unit out to the external tray if thick paper or OHP mode is selected, or if the external tray is selected as the output tray with the printer driver.

Peripherals

G571-9

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DUPLEX INVERTER UNIT 23 February, 2001

2.3.3 FEED TO DUPLEX FEED UNIT

[A]

[C]

G571D107.WMF G571D111.WMF

This shows how the machine feeds paper back into the machine after side 1 has been printed.

[B]

The junction gate [A] diverts the paper from the fusing unit to the lower part of the inverter unit. After the duplex inverter sensor [B] has been activated, the machine waits until the trailing edge has passed junction mylar 3 [B]. Then, the paper is switched back and junction mylar 3 directs the paper back into the machine for the second side.

The next page shows how the paper is fed out to the finisher after both sides have been printed.

G571-10

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23 February, 2001 DUPLEX INVERTER UNIT

2.3.4 FEED TO TWO-TRAY FINISHER

With Optional One-Tray Paper Feed Unit

[B]

[D]

[A]

[D]

G571D107.WMF

[C]

G571D108.WMF

The paper is fed out to the finisher from the upper exit [A]. The junction gate [B] diverts the paper from the fusing unit to the lower part of the

inverter unit. After the duplex inverter sensor [C] has been activated, the machine waits until the trailing edge has passed junction mylar 1 [D]. Then , the paper is switched back and junction mylar 1 directs the paper out to the finisher.

With Optional LCT or Two-Tray Paper Feed Unit

[B]

[A]

[D]

G571D109.WMF

[E]

[C]

G571D110.WMF

The paper is fed out to the finisher from the lower exit [A]. The junction gate [B] diverts the paper from the fusing unit to the lower part of the

inverter unit. After the duplex inverter sensor [C] has been activated, the machine waits until the trailing edge has passed junction mylar 2 [D], but before it passes junction mylar 3 [E]. Then, the paper is switched back and junction mylar 2 directs the paper out to the finisher.

G571-11

Peripherals

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DUPLEX FEED UNIT 23 February, 2001

2.4 DUPLEX FEED UNIT

2.4.1 DRIVE

[A]

G571D105.WMF

The duplex feed motor [A] drives all paper transport rollers.

2.4.2 FEED-IN AND FEED-OUT

[A]

G571D112.WMF

The duplex feed unit feeds the paper from the duplex inverter unit to the relay roller [A].

G571-12

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ELECTRICAL COMPONENT LAYOUT (G571)

1 2 3

G571D102.WMF

G571D103.WMF

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ELECTRICAL COMPONENT DESCRIPTION (G571)

Symbol Description Index No. P-to-P

Motors

M1 Duplex inverter 1 4 F3 M2 Duplex inverter 2 8 F3 M3 Duplex feed 12 G1

Sensors

S1 Exit 1 1 G3 S2 Duplex feed 13 G1 S3 Duplex inverter 10 G3 S4 Exit 2 2 G3 S5 Exit 3 9 G3

Solenoids

SOL1 Junction gat e 3 G3

Switches

SW1 Duplex door 6 F3 SW2 Duplex inverter unit 7 G3

PCBs

PCB1 Duplex control 5 F2 PCB2 Duplex drive 11 F1