Ricoh RT35 SPECIFICATIONS

LCT

(A667)

25 April 1997 SPECIFICATIONS

1. SPECIFICATIONS

Copy Paper Size: A4 sideways or 11" x 8

2

Copy Paper Weight: 60 g/m

to 90 g/m2 (16 lb to 24 lb)

Tray Capacity: Sheets: 1500 (80 g/m

1/2

“

2

)
or
Stack height: Less than 180 mm (7")

Power Source + 24Vdc and +5Vdc from the main machine
Power Consumption: 22.1 W
Dimensions (W x D x H): 290 x 440 x 545 mm (11.4" x 17.3" x 21.5")
Weight: 13 kg (28.6 lb)

A667-1

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COMPONENT LAYOUT 25 April 1997

2. COMPONENT LAYOUT

2.1 MECHANICAL COMPONENT LAYOUT

12

3

4

5

9

6

8

7

1. Relay Roller

2. Paper Feed Roller

3. Upper Limit Sensor

4. Timing Belt

5. Side Fence

A667V500.wmf

6. End Fence

7. Bottom Plate

8. Paper End Sensor

9. Relay Sensor

A667-2

25 April 1997 COMPONENT LAYOUT

2.2 ELECTRICAL COMPONENT LAYOUT

12

3

4

15

14

13

5

6

7

8

9

12

1. Relay Sensor

2. Transport Motor

3. Paper Feed Motor

4. Stack Height Sensor 3

5. Paper Size Sensor

6. Stack Height Sensor 2

7. Unit Set Switch

8. Stack Height Sensor 1

11

10

A667V501.wmf

9. LCT Drive Board

10. Lower Limit Sensor

11.Tray Lift Motor

12. LCT Cover Switch

13. Tray Down Switch

14. Paper End Sensor

15. Upper Limit Sensor

Options

A667-3

COMPONENT LAYOUT 25 April 1997

2.3 ELECTRICAL COMPONENT DESCRIPTIONS

Refer to the point-to-point diagram on the waterproof paper for the locations
of these components.

Symbol

Printed Circuit Board

PCB 1 9

Motors

M 1 2 Transport Drives the transf er roller.
M 2 3 Paper Feed Drives the paper feed roller.
M 3 11 Tray Lift Lifts up and lowers the bottom plate.

Sensors

S 1 1

S 2 8 Paper Near-end 1 Detects the amount of p aper in the LCT.
S 3 6 Paper Near-end 2
S 4 4

S 5 5

S 6 10
S 7 14 Paper End Detects the paper end condition.

S8 15

Index

No.

Description Notes

LCT Drive Interfaces the se nsor signals with t he

main machine, and transfers th e m ot or
drive signals from the main machi ne.

Relay Detects the leadi ng edge of paper to

determine the paper feed motor stop
timing. Also detects misfeeds.

Note that these sensors may not be

Paper Near-end 3
Paper Size Detects whether A4 size paper or Letter

Lower Limit Detects when the bottom plate i s at i ts

Upper Limit Detects when the paper stack in t he

used, depending on the main machi ne.

size paper is be i ng used.

lowest positi on.

paper tray is at the cor rect height to stop
the tray lift motor.

Switches

SW 1 7

SW 2 12

SW 3 13 Tray Do w n Lowers th e bottom plate.

Unit Set Cuts the dc power line and detects

whether the LCT is open or not.

LCT Cover Cuts the dc power line of the lift motor and

detects whether the LCT cover is open or
not.

A667-4

25 April 1997 COMPONENT LAYOUT

2.4 DRIVE LAYOUT

1

7

4

2

3

4

5

1. Relay Rolller

2. Transport Motor

3. Paper Feed Motor

4. Timing Belt

6

A667V502.wmf

5. Drive Pulley

6. Tray Lift Motor

7. Paper Feed Roller

Options

A667-5

DETAILED SECTION DESCRIPTIONS 25 April 1997

3. DETAILED SECTION DESCRIPTIONS

3.1 PAPER LIFT MECHANISM

[C]

[A]

[I]

[D]

[J]

[F]

[F]

[H]

[E]

[H]

[B]

[G]

A667D500.wmf

The upper limit sensor [A] controls the tray lift motor [B]. The actuator [C] for
the sensors on the feed roller shaft [D]. The tray lift motor drives the bottom
plate [E] which is attached to the timing belts [F] through the gear [G] and
drive pulleys [H].

The paper feed rollers [I] are always lowered by the weights [J]. When the
LCT cover is closed, the tray lift motor starts rotating and the bottom plate
starts lifting.

When the top sheet of the paper stack raises the paper feed roller, the upper
limit sensor is activated and the tray lift motor stops.

During copying, when the level of the paper stack has fallen past a certain
point (when the actuator [C] exits the upper limit sensor), the tray lift motor
turns on to maintain the correct level for paper feed.

A667-6

25 April 1997 DETAILED SECTION DESCRIPTIONS

3.2 PAPER FEED MECHANISM

[A]

[B]

[B]

[F]

[A]

[E]

[D]

[C]

A667D504.wmf

The LCT uses the corner separator system. The paper feed rollers [A] always
contact the top of the paper stack because of the weights [B] on the paper
feed shaft. When the LCT receives the paper feed start command, the paper
feed motor [C] and the transport motor [D] start to feed the paper. When the
leading edge of the paper activates the relay sensor [E], the paper feed motor
stops but the transport motor stays on to feed the paper continuously. At this
time, the paper feed roller is also rotating to help feed the paper. The gear
inside the one-way clutch [F] allows this movement. When the leading edge
of the paper activates the registration sensor of the main machine, the
transport motor stops.

Options

A667-7

DETAILED SECTION DESCRIPTIONS 25 April 1997

3.3 PAPER NEAR-END/END DETECTION

[F]

[G]

[E]

[A]

[B]

[C]

[D]

A667D502.wmf

[H]

This LCT can detect four paper near-end condition levels and the paper end
condition.

NOTE:

The number of paper near-end detection levels actually used
depends on the main machine.

The paper near-end condition is detected by three near-end sensors [A, B,
and C] and the actuator [D] attached to the bottom plate. The elevation of the
bottom plate varies with the amount of the paper remaining in the LCT. The
actuator enters and leaves the sensors as the bottom plate moves up and
down.

When the LCT runs out of paper, the paper end feeler [E] drops into the
cutout [F] in the tray bottom plate and the paper end sensor [G] is activated.
When a paper end condition occurs, the tray lift motor lowers the bottom
plate. When the lower limit sensor [H] is activated by the bottom plate, the
tray lift motor stops.

A667-8

25 April 1997 DETAILED SECTION DESCRIPTIONS

The relationship between the sensors and the paper near-end/end level is as
follows.

Near-end Sn [C] Near-end Sn [B] Near-end Sn [A] End Sn [G]
Paper tray full
75% full
50% full
25% full
Near-end (about 70

sheets remaining)
Paper end

OFF OFF OFF OFF

ON OFF OFF OFF
ON ON OFF OFF

OFF ON OF F OFF
OFF —- ON OFF
OFF OFF —- ON

ON: Activated (actuator inside the sensor)
OFF: Not activated
—-:Not specified

A667-9

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DETAILED SECTION DESCRIPTIONS 25 April 1997

3.4 PAPER FEED TIMING AND JAM DETECTION

[A4 Sideways, 20 ppm]

0 21.510.5

306 ms

on

Paper Feed Motor

off

1427 ms 700 ms

on

Transport Motor

off

J1

on

Relay Sensor

off

on

Registration Sensor

off

[s]

J2

A667D503.wmf

J1: Checks whether the relay sensor is activated within 0.8 s after the

paper feed motor has been energized.

J2: Checks whether the registration sensor is activated within 2.01 s

after the relay sensor has been activated.

A667-10

25 April 1997 INSTALLATION

4. INSTALLATION

4.1 ACCESSORY CHECK

No. Description Q’ty

1 Philips Screw - M3x8 2
2 Stepped Screw - M3x6 2
3 Installation Pr ocedure 1
4 NECR (Ricoh version only) 1

4.2 INSTALLATION PROCEDURE

[A]

A667I500.wmf

NOTE:

[A]

The optional paper feed unit (G697) or the optional table must be
installed before installing the LCIT.

CAUTION

+

Unplug the main machine power cord before starting the following
procedure.

1. Remove the two strips of tape [A].

A667-11

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INSTALLATION 25 April 1997

[B]

[C]

[A]

[D]

[C]

A667I501.wmf

2. Open the right lower cover [A] of the main machine.

3. Remove the paper entrance cover [B] from the right lower cover [A].

4. Remove two caps [C].

5. Install two stepped screws [D] on either the optional paper feed unit or the
optional table (long stepped screws for the optional paper feed unit, short
stepped screws for the optional table).

A667-12

25 April 1997 INSTALLATION

[B]

[C]

A667I505.wmf

[B]

[A]

A667I502.wmf

6. Peel off the backing [A] of the double side tape attached to the rear side
of the bracket [B].

7. Install two brackets [B] in the area between the main machine and the
optional paper feed unit or table, as shown.

8. Install the LCIT [C], as shown.

A667-13

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INSTALLATION 25 April 1997

[B]

[A]

[C]

[B]

[D]

A667I510.wmf

9. Push the release lever [A] and slide the LCIT to the right (front view), then
secure the brackets [B] (2 screws).

10. Return the LCIT to the previous position.

11. Connect the LCIT cable [C] to the main machine.

12. Swing open the LCIT cover [D] and load the paper.

13. Plug in the power cord and turn on the main switch, then check the LCIT
operation.

A667-14

25 April 1997 INSTALLATION

4.3 PAPER SIZE CHANGE

[A]

[B]

A566I506.wmf

[C]

A667I507.wmf

1. Open the LCT cover.

2. Move the front side plate [A] and rear side plate [B] to the appropriate
position.

3. Move the end fence [C] to the appropriate size position (take it out and
turn it around).

A667-15

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PREVENTIVE MAINTENANCE TABLE 25 April 1997

5. PREVENTIVE MAINTENANCE TABLE

NOTE:

The amounts mentioned as the PM interval indicate the number of
prints.

Symbol Key: C: Clean, R: Replace, L: Lubricate, I: Inspect

Item EM 200k 400k 600k NOTE

Feed Roller R R R
Transport Rol l er C C C C Dry cloth or water
Paper Bottom Plate Pad C C C C Dry cloth or wat er

6. SERVICE TABLES

6.1 TEST POI N T T A BLE

Number Function

TP101 GND
TP102 + 24V
TP103 + 5V
TP104 GND

6.2 FUSE TABLE

Number Rating Function

FUSE 101 6. 3A, 125V Proteccts the +24V line.

A667-16

25 April 1997 REPLACEMENT AND ADJUSTMENT

7. REPLACEMENT AND ADJUSTMENT

7.1 EXTERIOR COVER REMOVAL

[C]

[B]

[D]

[A]

A667R500.wmf

[E]

1. Top Cover
Open the LCT cover [A], then remove the top cover [B] (3 screws).

2. Front Cover
Remove the front cover [C] (2 screws).

3. Rear Cover
Remove the rear cover [D] (2 screws).

4. Right Cover
Open the LCT cover, then remove the right cover [E] (1 screw).

5. LCT Cover
Open the LCT cover, then remove the LCT cover [A] (1 clip).

A667-17

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REPLACEMENT AND ADJUSTMENT 25 April 1997

7.2 PAPER FEED ROLLER REMOV AL

[C]

[B]

[B]

[A]

A667R501.wmf

1. Open the LCT cover.

2. Release the hook [A] of the paper feed roller [B].

3. Lift up the paper feed roller shaft [C], then remove the paper feed roller.

A667-18

25 April 1997 REPLACEMENT AND ADJUSTMENT

7.3 TRAY LIFT MOTOR REMOVAL

[A]

[A]

[C]

[B]

[D]

A667R502.wmf

1. Remove the top cover, front cover, and rear cover (see Exterior Cover
Removal).

2. Remove the belt stoppers [A] (2 screws each).

3. Remove the two screws [B] holding the tray lift motor.

4. Lift up the bottom plate [C], then take out the tray lift motor [D] (1
connector).

NOTE:

When reinstalling the belt stoppers [A], move the bottom plate to its
lowest possible position.

A667-19

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REPLACEMENT AND ADJUSTMENT 25 April 1997

7.4 PAPER FEED MOTOR AND TRNSPORT MOTOR

[A]

[B]

A566R503.wmf

1. Remove the top cover and rear cover (see Exterior Cover Removal).

2. Remove the paper feed motor [A] (2 screws, 1 connector).

3. Remove the transport motor [B] (2 screws, 1 connector).

7.5 PAPER SIZE SENSOR

[C]

[A]

[A]

[B]

A667R504.wmf

1. Remove the top cover and rear cover (see Exterior Cover Removal).

2. Unclamp the harnesses from the clamps [A] on the sensor bracket [B].

3. Remove the sensor bracket [B] (1 screw).

4. Remove the paper size sensor [C] (1 connector).

A667-20

25 April 1997 REPLACEMENT AND ADJUSTMENT

7.6 LOWER LIMIT SENSO R

[A]

[A]

[B]

[C]

A667R505.wmf

1. Remove the top cover, front cover, and rear cover (see Exterior Cover

Removal).

2. Remove the belt stoppers [A] (2 screws each).

3. Lift up the bottom plate [B], then remove the lower limit sensor [C] (1

connector).

NOTE:

When reinstalling the belt stoppers [A], move the bottom plate to its
lowest possible position.

A667-21

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ELECTRICAL COMPONENT LAYOUT
LCT (A667)

14

13

12

12

15

3

4

5

6

7

8

9

11

10

A667s501.wmf

Symbol Index No. Name P to P

Printed Circuit Board

PCB 1 9 LCT Drive F4

Motors

M 1 2 Transport F1
M 2 3 Paper Feed D1
M 3 11 Tray Lift D1

Sensors

S 1 1 Relay H1
S 2 8 Paper Near-end 1 J1
S 3 6 Paper Near-end 2 K1
S 4 4 Paper Near-end 3 L1
S 5 5 Paper Size I1
S 6 10 Lower Limit I1
S 7 14 Paper End G1
S8 15 Upper Limit G1

Switches

SW 1 7 Unit Set A1
SW 2 12 LCT Cover B1
SW 3 13 Tra y Down C1

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A

C

D

G

H

K

LCT A667 Point to Point Diagram (For G020)

A

Unit

Set

(SW1)

B

LCT Cover

(SW2)

Tray Down

Switch

C

(SW3)

Tray Lift Motor

D

Paper Feed
Motor

M2

E

Transport
Motor

M1

F

Upper Limit

Senso r

(S8)

G

Paper End

Senso r

(S7)

H

I

J

K

L

Relay

Senso r

(S1)

Paper Size

Senso r

(S5)

Lower Limit

Senso r

(S6)

Paper
Near-end
Sensor 1

(S2)

Paper
Near-end
Sensor 2

(S3)

Paper
Near-end
Sensor 3

(S4)

24V - 1
Unit Set -2

+24V S1 [W24] -4
24V S1 -5

LCT Cover [W24] -6
+24V S2 -8

Tray Down SW [W5] -6
GND -5
+5V -4
Tray Down LED [5] -3

Up [V24] -2

M3

Down [V24] -1

A [W24] -1
COM +24V S2 - 2
/A [W24] -3
B [W24] -4
COM +24V S2 - 5
/B [W24] -6
A [W24] -7
COM +24V S2 - 8
/A [W24] -9
B [W24] -10
COM +24V S2 -11
/B [W24] -12

+5V -B12
Upper Limit [V5] -B11
GND -B10

+5V -B9
Paper End [V5] -B8
GND -B7

+5V -B6
Relay [W5] -B5
GND -B4

+5V -B3
Paper Size [V5] -B2
GND -B1

+5V -A12
Lower Limit [V5] -A11
GND -A10

+5V -A9
Near-end 1 [V5] -A8
GND -A7

+5V -A6
Near-end 2 [V5] -A5
GND -A4

+5V -A3
Near-end 3 [V5] -A2
GND -A1

CN106CN105CN104CN103

LCT

Drive

Board

(PCB1)

-A1 Unit Set [V5] -A1

-A2 LCT Cover [V5] -A2

Tray Down Switch [

-A3

-A4 Tray Down LED [W5]-A4

-A5 Unit Detect -A7

-A6 -A6

-A8 Lift Motor Down [W5]-A11

-A9 Lift Motor Up [W5] -A10

Paper Feed Motor [W5]

-A10

-A11 Transport Motor [W5] ­A13

-B3 Near-end 2 [V5] -B15

CN101CN102

-B4 Near-end 1 [V5] -B16

-B5 Near-end 0 [V5] -B17

-B6 Paper Size [V5] -B18

-B7 Paper End [V5] -B19

Upper Limit Sensor [V5]

-B8

Lower Limit Sensor [V5]

-B9

-B10 Relay Sensor [W5] -B24

-B11 GND -A25

-1 +24V -A19

-2 +24V -A18

-5 GND -A17

-6 GND -A16

-9 +5V -A15

-11 GND -A14

-12 GND -B12

-10 +5V -B11

-7 GND -B10

-8 GND -B9

-3 +24V -B8

-4 +24V -B7

W

5]

Symbol Table

AC Line
DC Line

Puls

Signal Direction

V
W

[ ]

Active High
Active Low
Voltage

-A3

-A12

-B22

-B23

CN179

BECU

B

E

F

I

J

L

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4.1 INSTALLATION PROCED URE (FOR THE G020)

The LCT unit will be installed by a user.
Follow the directions on the LCT installati on procedure sheet that comes with the
LCT.