Ricoh RT31 SPECIFICATIONS

LARGE CAPACITY TRAY

(Machine Code: A380)

23 April 1993 SPECIFICATIONS

1. SPECIFICATIONS

Copy Paper Size: A4 sideways

B5 Sideways

8 1/2" x 11" sideways Copy Paper Weight: 64 ~ 105g/m2 16~24lb Power Source: DC24V, 5V (from the copier) Power Consumption: 40W Dimensions (W x D x H ): 403 x 529 x 608mm

(15.9" x 20.8" x 23.9") Weight: 19.8kg (43.7lb) Tray Capacity: 3,500 sheets (may vary slightly depending on

paper weight)

Large

Capacity Tray

MECHANICAL COMPONENT LAYOUT 23 April 1993

2. MECHANICAL COMPONENT LAYOUT

1. Bottom Plate

2. Tray Drive Belt

3. Separation Roller

4. Transport Rollers

5. Feed Roller

6. Pick-up Roller

23 April 1993 ELECTRICAL COMPONENT DESCRIPTION

3. ELECTRICAL COMPONENT DESCRIPTION

Symbol Name Function Index No.

Sensors

S1 Paper End Informs the CPU that there is no

paper on the LCT bottom pla te .

S2 Paper Near End Informs the CPU that about 60

sheets of paper remain on th e LCT

bottom plate.

S3 Paper Position Detects the paper position. 4 S4 Tray Down Informs the CPU that the LCT

bottom plate is in the lowe st

position.

S5 Feed Controls the paper feed clutch

off-on timing and the pick-up

solenoid off timing.

S6 Lift Detects the correct paper feed

height.

Switches

SW1 Feed Unit Cover Detects if the feed unit cover is

open or not.

Note: There are two sensors.

SW2 LCT Cover Detects if the LCT cover is open or

not.

Note: There are three sensors.

SW3 Tray Down Lowers the LCT bottom plate. 8

Motors

M1 LCT Lifts and lowers the LCT bottom

plate to bring pape r to the feed

position and allow loading of the

paper.

M2 Feed Drives all fe ed and tran spo rt rollers. 13

Others

SOL1 Pick-up Controls the up-down movement of

the pick-up roller.

MC1 Feed Start s paper fe ed from the LCT. 12

Large

Capacity Tray

MECHANICAL OPERATION 23 April 1993

4. MECHANICAL OPERATION

[F][G]

[D]

[E]

[A]

[C]

The LCT uses an FRR feed system which uses three rolle rs. The pick-up [A], separation [B] and feed [C] rollers are common with those of the by-pass feed unit of the mainframe but different from those of the paper feed stations in the paper t ray unit.

[B]

The LCT feed motor [D] drive s the pick-up, separation, fee d, and transport [E] rollers.

The pick-up and feed rollers rotate only when the LCT feed clutch [F] activates.

Paper feeding starts when the LCT pick up sole noid [G] activates.

23 April 1993 PAPER LIFT MECHANISM

5. PAPER LIFT MECHANISM

[C]

[B]

[C]

[A]

The bottom plate [A] of the LCT is raised and lowered by th e LCT mot or [B] and the drive belts [C]. When the main swit ch is on and th e LCT cover is closed, the pick-up sole no id [D] activates and the LCT motor [B] rotates clockwise to raise the bottom plate until the top sheet pu she s up th e pick-up roller [E]. When the lift sen sor [F] is de-act ua te d, the copie r CP U de-a ctivates the LCT motor [B] and the pick-up solenoid [D].

[D]

[F]

[E]

Large

Capacity Tray

PAPER LIFT MECHANISM 23 April 1993

[C]

[A]

[B]

If the tray down switch [A] is presse d, or paper runs out, or a paper jam occurs in the LCT, the LCT motor [B] rotates counterclockwise to lower the bottom plate. Howeve r, it is not lowere d all the way down at this time. When the paper position sensor [C] activa te s, th e LCT mot or sto ps on ce. At this point, the bottom plate (or the top sheet of paper) is positioned about 5cm below the top. This gives eno ugh space for the customer to replenish about 500 sheets of paper. If the tray down switch is the n pre ssed again, the bottom plat e move s down and stops once again when the top sheet of paper just passes the paper position sensor. In this way, the botto m plate is lowered 5cm at each press of the tray down switch. This allows the custo mer to replenish paper in convenient amounts and at the same position.

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