Option Printer MB-502

MB-502Option Printer

THEORY OF OPERATION

Code Y109740-7

PUBLICATION ISSUED BY:

Olivetti S.p.A.77, Via Jervis - 10015 Ivrea (TO)Italy

Copyright © 2008, OlivettiAll rights reserved

Revision historyAfter publication of this service manual, the parts and mechanism may be subject to change forimprovement of their performance. Therefore, the descriptions given in this service manual may not coincide with the actual machine.

When any change has been made to the descriptions in the service manual, a revised version will beissued with a revision mark added as required.

Revision mark:• To indicate clearly a section revised, show to the left of the revised section.

A number within represents the number of times the revision has been made.

• To indicate clearly a section revised, show in the lower outside section of the correspond-ing page. A number within represents the number of times the revision has been made.

NOTERevision marks shown in a page are restricted only to the latest ones with the old ones deleted.

• When a page revised in Ver. 2.0 has been changed in Ver. 3.0: The revision marks for Ver. 3.0 only are shown with those for Ver. 2.0 deleted.

• When a page revised in Ver. 2.0 has not been changed in Ver. 3.0: The revision marks for Ver. 2.0 are left as they are.

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1

1

MB-502

Outline

Composition/Operation

Theory of Operation Ver. 1.0 Jun. 2008

i

CONTENTS

MB-502

Outline1. Product specifications ............................................................................................. 1

2. Paper path............................................................................................................... 3

Composition/Operation3. Composition ............................................................................................................ 5

4. Drive........................................................................................................................ 6

............................................ 7

............................................ 7

............................................ 8

.......................................... 10

5. Operation ....................................................................

5.1 Bypass paper lifting motion control...........................

5.2 Paper size detection .................................................

5.3 Paper empty detection..............................................

MB-502

Outline


Theory of Operation Ver. 1.0 Jun. 2008

ii

Blank Page

Theory of Operation Ver. 1.0 Jun. 2008 1. Product specifications

1

Outline

MB-502

Outline1. Product specificationsA. Type

B. Paper

Name Multiple Bypass Tray

Installation Screwed to the copier

Registration Center

Type Paper source (maximum tray capacity)

Copy paper type Plain paper (60 to 90 g/m2, 16 to 24 lb)

100 sheets

Thick paper 1 20 sheets

10 sheets

A5S, B5, B5S, A4, A4S, A3,

x 14, 11 x 17

LS/2 x 8-1/2S, 7-1/4 x 10-1/2,8-1/2 x 11, 8-1/2 x 11S, 17, 12 x 18

h

mm

*1: Image is not guaranteed when thick paper 3 is used*2: Monochrome print only.

(91 to 150 g/m2, 24.2 to 40 lb)

Thick paper 2 (151 to 209 g/m2, 40.2 to 55.6 lb)

Thick paper 3 (210 to 256 g/m2, 55.9 to 68.1 lb) *1

OHP film (crosswise feeding only) *2

Label sheets

Envelopes

Postcards

Translucent paper

Paper size Metric area A6S, B6S, A5,A3 Wide, FLS8-1/2 x 11, 8-1/2

Inch area B6S, A4, A3, F5-1/2 x 8-1/2, 5-1

7-1/4 x 10-1/2S, 8-1/2 x 14, 11 x

Copy paper dimensions

Width 90 to 311.1 mm3.6 to 12.3 inc

Length 139.7 to 457.25.5 to 18 inch

Theory of OperationY109740-7

1. Product specifications Theory of Operation Ver. 1.0 Jun. 2008MB-502

Outline

C. Machine specifications

D. Operating environmentConforms to the operating environment of the main body.

NOTE• These specifications are subject to change without notice.

Power Requirements DC 24 V ± 10 % (supplied from the main body)

DC 5 V ± 5 %

Max. Power Consumption

27 W or less

Dimensions 472 mm (W) × 456 mm (D) × 102 mm (H)18.6 inch (W) × 18.0 inch (D) × 4.0 inch (H)

Weight 2.9 kg (6.4 lb)

Y109740-7
2 Theory of Operation

Theory of Operation Ver. 1.0 Jun. 2008 2. Paper path

3

Outline

MB-502

2. Paper path

T1C001AA

Paper feed from the bypass tray

Main body

MB-502

AD-505

A0EP

PC-105

PC-204

Y109740-7 Theory of Operation

2. Paper path Theory of Operation Ver. 1.0 Jun. 2008MB-502

Outline

Y109740-7
4
Blank Page

Theory of Operation

Theory of Operation Ver. 1.0 Jun 2008 3. Composition

5


MB-502

Composition/Operation3. Composition

A02FT2C031AA

002AA

PS13)

Paper side plate

)

FD size sensor/3 (PS22)

A0EPT2C

Bypass paper take-up roller

Paper empty sensor (

Paper lifting plate

Bypass separator roller

Paper width detection resistor (VR1)


FD size sensor/2 (PS21


4. Drive Theory of Operation Ver. 1.0 Jun 2008Composition/Operation

MB-502

4. Drive

030AA

A02FT2C032AA

r (PS14)

Paper feed clutch (CL5)

s paper take-up roller

on sensor (PS14)

aper lifting cam

Y109740-7
6
A02FT2C

Lift-up position sensoManual pick-up solenoid (SD2)

Bypas

Transport motor (M1)* Main body

Lift-up positi


Manual pick-up solenoid (SD2)

P

Theory of Operation

Theory of Operation Ver. 1.0 Jun 2008 5. Operation

7


MB-502

5. Operation

5.1 Bypass paper lifting motion control

• It turns the manual pick-up solenoid ON when the bypass paper feed is started. The lift-ing cam will rotate to move the paper lifting plate up to the feeding position.

• When the printing is finished, the manual pick-up solenoid will be ON again. The paper lifting cam will then rotate to move the paper lifting plate down to the waiting position.

• The paper lifting plate will stay at the feeding position while the job is being executed. It will move down to the waiting position when the job is finished and no following printing is demanded.

• The position of the paper lifting plate is detected by the detection plate which is mounted coaxially with the paper lifting plate, and also by the lift-up position sensor.

• When the paper jam occurs, the paper lifting plate will move down to the waiting position.

4038T2C183AA

Lift-up position sensor(PS14)

aper take-up roller

-up solenoid


A0EPT2C001AA

Move to standby position

A02FT2C030AA

Bypass p

Manual pick(SD2)



Lift-up position sensor(PS14)

Transport motor (M1) *Main body


Lift-up position sensor (PS14)


Start key ON


5. Operation Theory of Operation Ver. 1.0 Jun 2008Composition/Operation

MB-502

5.2 Paper size detection

• The size of the paper loaded in the bypass section is detected by the combination of ON or OFF positions of the three FD size sensors and the paper width detection resistor.

• Moving the paper guide varies the resistance value of the paper width detection resistor.

Metric area

for Foolscap.

Paper size detected




Paper width detection resistor (VR1)

Width (mm)

A6S

OFF OFF OFF

80 to less than 115

B6S 115 to 144 inclusive

A5 196 to 225 inclusive

B5 242 to 268 inclusive

A5S 133 to 164 inclusive

169 to less than 204

204 to 225 inclusive








r/3 Paper width detection

resistor (VR1)

Width (mm)















Y109740-7
8
Inch area

*1: One of the following paper sizes can be selected to be set 8 x 13, 8.125 x 13.25, 8.25 x 13, 8.5 x 13, 8.65 x 13

ON OFF OFF

B5S

A4S

8-1/2 x 11

A4

FLS *1 ON ON OFF

8-1/2 x 14

ON ON ON11 x 17

A3

A3_Wide

Paper size detected



FD size senso(PS22)

B6S

OFF OFF OFF5-1/2 x 8-1/2

7-1/4 x 10-1/2

5-1/2 x 8-1/2S

ON OFF OFF

7-1/4 x 10-1/2S

8-1/2 x 11S

8-1/2 x 11

A4

FLS *1 ON ON OFF

8-1/2 x 14

ON ON ON

B4

11 x 17

A3

12 x 18

Theory of Operation

Theory of Operation Ver. 1.0 Jun 2008 5. Operation

9


MB-502

A02FT2C035AA




Paper width detection resistor (UN1)

4038T2C184AA


5. Operation Theory of Operation Ver. 1.0 Jun 2008Composition/Operation

MB-502

5.3 Paper empty detection

• Paper empty is detected by the paper empty sensor.• Paper empty is detected both at the standby and the paper feed positions.

A02FT2C034AA

Paper empty sensor (PS13)

Y109740-7
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A02FT2C033AA

When there is no paper

When the paper is fully supplied

Theory of Operation

UPDATING STATUS

DATE UPDATED PAGES PAGES CODE

09/2008 1ST EDITION 16 Y109740-7

Documents

Option Printer MB-502