Ricoh rt17 Service Manual

20 December 1991 SPECIFICATIONS

1. SPECIFICATIONS

Copy Paper Size B4 (lengthwise)

A4 (lengthwise or sideways) B5 (lengthwise or sideways) 81/2" x 14" (lengthwise)

81/2" x 11" (lengthwise or sideways) Copy Paper Weight: 52 g to 93 g (14 lb to 24 lb) Tray capacity: 1,000 sheets (may vary slightly depending on

paper weight) Lift Time: Maximum: 12 seconds (50 Hz)

10 seconds (60 Hz)

Power Source: 220 V/60 Hz 0.15 A

220 V/50 Hz 0.15 A

240 V/50 Hz 0.15 A

115 V/60 Hz 0.3 A

110 V/60 Hz 0.3 A Power Consumption: Maximum 30 W Dimensions:(W x D x H) 385 mm x 545 mm x 220 mm

(16.2" x 21.5" x 8.7") Weight: 11.5 kg (25.3 lb)

MECHANICAL COMPONENT LAYOUT 20 December 1991

2. MECHANICAL COMPONENT LAYOUT

1. Drive Wire

2. Drive Gears

3. Drive Pulley

4. Tray Wire

5. Lift Rods

20 December 1991 ELECTRICAL COMPONENT LAYOUT

3. ELECTRICAL COMPONENT LAYOUT

1. LCT transformer (TR2)

2. LCT PCB (PCB7)

3. Noise Filter

4. Ac fuse (220 V)

4. Circuit breaker (115 V) (NF2)

5. LCT Motor (M15)

6. Surge Suppressor (SS1)

7. Tray down sensor (S34)

8. Paper size sensor (S35)

9. LCT safety switch (SW11)

10. LCT operation panel (PCB1 2)

ELECTRICAL COMPONENT DESCRIPTIONS 20 December 1991

4. ELECTRICAL COMPONENT DESCRIPTIONS

Index

No.

Motor

5 LCT Motor Lifts and lowers the LCT bottom plate to

Switches

9 LCT safety Switch Disables LCT motor when covers are

Sensors

7 Tray Down Sensor Detects when tray is completely down

8 Paper Size Sensor Determines what size paper is loaded

Printed Circuit Boards

2 LCT PCB Controls LCT tray lift interfaces LCT

10 LCT Operation

Panel

Name Function Symbol

bring paper to feed position and allow loading of paper.

open. Detects when covers are opened.

to stop tray motor.

into the LCT.

with copier. Contains the Down SW, Down

indicator, and Open Cover indicator for the LCT.

P to P

Location

M15 A-10

SW11 A-10

S34 B-10

S35 B-7

PCB7 A-7 to 10

Transformer

1 LCT Transformer Steps down wall voltage to 100 Vac for

LCT.

Circuit Breaker

4 LCT Circuit Breaker Overload protection for LCT. CB2 A-11

Noise Filter

3 Noise Filter Removes electrical noise From the AC

input lines.

6 Surge Suppressor Removes surge current from the AC

input lines.

TR2 A-11

NF2

SS1

20 December 1991 MECHANICAL OPERATION

5. MECHANICAL OPERATION

5.1 DRIVE MECHANISM

[E]

[D]

[A]

[G]

[C]

[F]

[B]

[I]

[H]

A reversible ac motor [A] drives the LCT’s bot to m plat e [B ] up and down . The motor’s drive is transmitted directly to the tray drive shaf t [C] via a worm

gear and worm wheel. The tray wires [D] have brace s on th em, these braces hold the ends of the two lift rods which support the tray bot to m plat e. When the wire drive pulley turns clockwise, the bra ces on the wires raise the lift rods [E] and the tray bottom plat e. The bottom plate rises until the paper in the tray pushes up the pick-up roller [F], actu at ing the copie r lif t sen sor [G ].

The tray bottom plate lowers when the tray drive motor t urn s the wire drive pulley counterclockwise. It stops moving down when the actuator plate [H]., on the left lift rod, actuates the tra y down sensor [I].

[D]

[E]

MECHANICAL OPERATION 20 December 1991

5.2 PAPER SIZE DETECTION

[C]

[F]

[A]

[B]

The paper size dial controls side post positioning and paper size detection. When the paper size dial [A] is rotated , th e cam gro ove [B] moves the size

lever [C], which repositions th e guide post s [D]. When the dial reaches a standard paper size, one of the actuat or plates [E] enters the paper size sensor [F].

Paper Size Detection Tab le (LCT)

Paper Size

B4 00011

A4 Sideways 0 0 1 0 0

A4 Lengthwise 0 0 1 0 1

B5 Sideways 0 0 1 1 0

B5 Lengthwise 0 0 1 1 1

11" x 8 8 8

1/2" 10001 1/2" x 11" 1 0 1 1 0 1/2" x 14" 1 0 1 0 0

12345

Sensor

20 December 1991 MECHANICAL OPERATION

5.3 COVER SAFETY SWITCH

The cover safety switch monitors whether or not the to p an d side covers are closed. If either cove r is open , th e safety switch is de-actuat ed .

Pins on the top and bottom actuator levers hold the safety switch actuator. The top actuator le ver is pushed down by the top cover, while the bottom actuator lever is pushed in by the side cover. Therefo re, the safety switch actuates only when bot h th e to p an d side covers are closed.

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