Samsung ML 7000 Manual de usuario

ML-7000 Series

ML-7050/7050N

Laser printer Contents

SERVICE Manual

1. Precautions

2. Reference Information

3. Product Information

4. Disassembly

5. Trouble Shooting

6. Exploded Views & Parts List

7.Electrical Parts List

8. Block Diagrams

9. PCB Diagrams

10. Port Thru

(Network Printer Card)

Samsung Electronics Co., Ltd. September. 1999

Printed in Korea

VERSION NO. : 0.1 P/N. JC68-00260A

ELECTRONICS

1. Precautions

1-1 Safety precautions

Read each caution carefully

1. Do not use the pinter near water or when exposed to inclement weather.

2. Do not place this printer on an unstable cart, stand or table, the product may fall, causing

serious damage to the product.

3. Slots and openings on the cabinet are provided for ventilation. To ensure reliable operation

and to protect the printer from overheation, do not block or cover any of these openings. Do

not place the printer in an enclosure unless the enclosure providesadequate ventilation.

4. Never push any kind of objects into the printer through the cabinet ventilaition slots as they

may touch dangerous hihg voltage points, create short circuits, cause a fire, or produce an

electrical shock. Never spill any kind of liquid on the printer.

5. Do not place the printer in a lacation where someone may trip on the cord.

6. Select a work surface that is lartge enough to hold the printer.

7. Operate this printer using the power source (110V, 220V, etc) indicated on the marking label.

If you are not sure of the type of power source available, consult your dealer or local power

company.

8. If you need to use an extension power cord with this printer, make sure that is uses a three-

wire grounded cord and that the total ampere ratings for all of the products using the

extension, do not exceed the extension cord ampere ration.

9. Do not allow anything to rest on th power cord or data communications cable.

10. Unplug this printer from the wall outlet before cleaning. Do not use liquid cleaners or aerosol

sprays. Use a damp cloth for cleaning.

11. Do not touch the surface of the photo-sensitive drum as marks ro scratches may impair print

quality.

12. Do not expose the drum unit to direct light for prolonged periods.

13. Use only standard papers, OHP films and approved envelopes.

Precautions

Samsung Electronics 1-1

1-2 Laser Safety Statement

The printer is certified in the U.S to conform to the requirement of DHHS 21CFR Subchapter J for Class I(1) laser

product, and elsewhere is certified as a class I laser product conforming to the requirement of IEC 825.

Class I laser product are not considered to be hazardous. The laser system and printer are designed so there is never

any human assess to laser radiation above a Class I level during normal operation, user maintenance, or prescribed

service condition

PrecautionsReference

Samsung Electronics

1-2

Caution : Never operate and service the printer with the protective cover removed from Laser Scanner

Assembly. The reflective beam, although invisible, can damage your eyes

LSU caution label is located on the LSU top side

CAUTION - INVISIBLE LASER RADIATION WHEN THIS COVER OPEN.

DO NOT OPEN COVER

VORSICHT - UNSICHTBARE SASERSTRAHLUNG, WENN ABDECKUNG GEÖFFNET.

NICHT DEM STRAHL AUSSETZEN.

ATTENTION - RAYONNEMENT LASER INVISIBLE EN CAS D’OUVERTURE, EXPOSITION DANGEREUSE

AU FAISCEAU.

ATTENZIONE - RADIAZIONE LASER INVISIBLE IN CASO DI APETURA, EVITARE L’ESPOSIZIONE AL

FASCIO.

PRECAUCION - RADIACION LASER IVISIBLE CUANDO SE ABRE, EVITAR EXPONERSE ALRAYO.

ADVARSEL - USTNLIG LASERSTRÄLNING VED ÄBNING, NÄR SIKKERHEDSBRYDERE ER UDE AF

FUNKTION, UNDGÄ UDSAETTELSE FOR STRÄLNING.

ADVARSEL - USYNLIG LASERSTRÄLNING NÄR DEKSEL ÄPNES, STIRR IKKE INN I STRÄLEN, UNNGÄ

EKSPONERING FOR STRALEN.

VARNING - OSYNLIG LASERSTRÄLNING NÄR DENNA DELÄR ÖPPNADOCH SPÄRREN ÄR

URKOPPLAD, BETRAKTA EJ STRÄLEN, STRÄLEN ÄR FARLIG.

VARO! - AVATTAESSA JA SUOJALUKITUS OHITEETTAESSA OLET ALTTINA NÄKYMÄTTÖMÄLLE

LASER SÄTELYLLE ÄLÄ KATSO SÄTEESEEN.

CLASS 1 LASER PRODUCT

LASER KLASSE 1

LUOKAN 1 LASERLAITE

APPAREIL A LASER DE CLASSE 1

TO IEC 825

2. Reference Information

2-1 Abbreviations and Acronyms

Tables 2-1 and 2-2 List abbreviations and acronyms which may be found in this service manual.

Table 2-1. Abbreviations

Abbv Definition Abbv Definition

amps amperes lb pound(s)

lin linearity

ass’y assembly lock bus lock

badac bad assess mm millimeter(s)

neg negative

bps bits per second od open drain

clk clock OSC oscillator

cm centimeter(s) OUT output

CON connector PIC picture

GND ground pos positive or position

HLDA hold acknowledge pot potential

HLDAR hold acknowledge received psynrq page synchronization request

HLDR hold request pwr power

HOR horizontal qty quantity

in inch(es) or input sw switch

INTA interrupt Acknowledge sync synchronous or

synchronization

INT Interrupt tach tachometer

INTR Interrupt request Vcc collector supply voltage(dc)

I/O Input and Output vert vertical

mpx multiplex Vp-p peak-to-peak voltage

VR variable resistor

Reference

Samsung Electronics 2-1

3. Product Information

Engine Specification

Item Descriptions Remarks

Product Information

Samsung Electronics 3-1

Controller Specification

Item Descriptions Remarks

’

Product Information

Samsung Electronics3-2

4. Disassembly

4-1 Front View

4-2 Rear View

Disassembly

Samsung Electronics 4-1

Control Panel

Cover Open

Cover Front

Cover Tray

Power Switch

Paper Level Indicator

Cover Rear

Controller

Cassette

Power Inlet

4-3 Cabinet Disassembly

4-3-1. Cover Right

Disassembly

Samsung Electronics4-2

Remove the screws and open the

Cover Rear.

In order to remove the Cover Right.

Please see the hook which locks

the cabinet to the frame, right hand

should first grab the hook and pull it

out for releasing the hook from the

frame.

Screw

Cover Rear

Cover Right

Screw

Hook

Disassembly

Samsung Electronics 4-3

The left hand should slide the

Cover Right to the backward.

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