SAMSUNG Laser ML-1450 ML-1451N Service Manual pages

SAMSUNG Laser ML-1450 ML-1451N Service Manual pages
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NTER
ML-1450 SERIES
ML-1450 / ML-1451N
SERVICE
LASER PRINTER
Manual
CONTENTS
1. Precautions
2. Specifications
3. Disassembly and Reassembly
4. Troubleshooting
5. Exploded Views and Parts List
6. Block Diagram
7. Connection Diagram
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This service manual is also provided on the web,
the ITSELF system f Samsung Electronics Co., Ltd.
“http://itself.sec.samsung.co.kr”
© Samsung Electronics Co.,Ltd. AUGUST 2002
Printed in Korea.
VERSION NO. : 1.04
CODE : JC-0063A
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This manual is stated and
provided for service description.
All rights reserved. Any parts of the
information in this manual are prohibited
from free duplication, use or translation
without prior written approval except in
cases allowed by the Copyright Act.
Specifications are subject to change without
prior notice.
Samsung Electronics Digital Printing CS Group
Copyright (c) 2002. 8.
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Precautions
1. Precautions
Please read the following carefully to prevent any accidents and not to damage the unit during service.
1-1 Safety Precautions
Samsung Electronics
Especially mind the safety on the part with
this mark.
You must use regular parts described in specifications for the parts inflammable and where the
current can be flown. Otherwise any hazard
such as an electric shock or a fire could occur.
LASER STATEMENT (LASERTURVALLISUUS)
WARNING : NEVER OPERATE AND SERVICE THE PRINTER
WITH THE PROTECTIVE COVER REMOVED
FROM LASER/SCANNER ASSEMBLY. THE
REFLECTIVE BEAM, ALTHOUGH INVISIBLE, CAN
DAMAGE YOUR EYES.
Class 1 laser product
Luokan 1 laserlaite
Klass 1 laser apparat
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Allonpituus 770-795nm
Teho 0.3mW±0.03mW
INVISIBLE LASER RADIATION WHEN
THIS COVER OPEN. DO NOT OPEN
THIS COVER.
VORSICHT
UNSICHTBARE LASERSTRAHLUNG,
WENN ABDECKUNG GEOFFNET.
NIGHT DEM STRAHL AUSSETZEN.
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CAUTION
REYONNEMENT LASER INVISIBLE EN CAS
D’OUVERTURE EXPOSITION DANGERUSE AU
FAISCEAU.
ATTENZIONE
RADIAZIONE LASER INVISIBLE IN CASO DI
APERTURA. EVITARE L’ESPOSIZONE LA FASCIO.
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ATTENTION
PRECAUCION
REDIACION LASER INVISIBLE CUANDO SE
ABRE. EVITAR EXPONERSE AL RAYO.
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Read each caution carefully:
1. Do not use this printer 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 in the cabinet are provided for
ventilation. To ensure reliable operation and to protect
the printer from ever heating, do not block or cover
any of these openings. Do not place the printer in an
enclosure unless the enclosure provides adequate
ventilation.
4. Never push objects of any kind into the printer through
the cabinet ventilation slots as they may touch dangerous high voltage points, create short circuits,
cause a fire, or produce an electrical shock. Never
spill liquid of any kind on the printer.
5. Do not place the printer in a location where someone
may trip on the cords.
6. Select a work surface that is large enough to hold the
printer.
7. Position the printer within six feet of the computer and
within five feet of an electrical outlet.
8. 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.
9. If you need to use an extension power cord with this
printer, make sure that it 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 rating. Also, make sure that
the total of all products plugged into the wall outlet
does not exceed 15 ampere.
10. Do not allow anything to rest on the power cord or
data communications cable.
11. Unplug this printer from the wall outlet before cleaning. Do not use liquid cleaners or aerosol sprays. Use
a damp cloth for cleaning.
12. Do not touch the surface of the photo-sensitive drum
as marks or scratches may impair print quality.
13. Do not expose the drum unit to direct light for prolonged periods.
14. Use only standard papers, OHP films, and approved
envelopes. Feed OHP films though the manual feed
slot only. See specifications for approved papers and
envelopes.
15. Other than replacing consumables such as paper
and toner, refer all questions to qualified service personnel.
CAUTION : Avoid exposure to invisible laser radiation when the
development unit is not installed.
1-1
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Precautions
1-2 Precautions on Disassembly and Reassembly
Very careful precautions should be taken when replacing
parts. Before replacing, please check cables because
you cannot put the cables that you removed for replacing
parts into the proper place if you would not make sure of
where they were connected and in which condition.
7. When disassembling, assembling, also observe small
components are located in place.
8. If you uncover and turn the machine over to replace
some parts, toner or paper particles may contaminate
the LSU window. Protect the LSU window with clean
paper.
Please do the following before disassembling for a repair
or replacement of parts.
Releasing Plastic Latches
1. Pull out paper cassette, printer cartridge installed.
Especially careful not to be scratched by the surface of
developer or not to expose them to light.
2. Turn the power switch off.
3. Take out the power plug, printer cable from the printer.
4. Use only the same type of part as original when replacing parts.
5. Do not force to open or fasten plastic material components.
6. Be careful that small parts such as screws should not
get in the printer.
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Many of parts are held in
place with plastic latches.
The latches break easily :
release them carefully.
To remove such parts,
press the hook end of the
latch away from the part to
which it is latched.
1-2
Samsung Electronics
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Precautions
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1-3 Tools for Troubleshooting
Standard: Test equipment to diagnose the Laser
printer supplied by Samsung Electronics.
2 DVM(Digital Volt Meter)
Standard: Indicates more than 3 digits.
Driver
5
Pinset
6
Cotton Swab
7
3 Electronic Scale
Standard: Equipment to check the weight of consumables(toner cartridge) supplied by Samsung
Electronics. (The gram unit can be measured.)
8
Standard: "-" type, "+" type (M3 long, M3 short,
M2 long, M2 short).
Standard: For general home use, small type.
Standard: For general home use, for medical service.
Cleaning Equipments a IPA(Isopropyl
Alcohol)dry cloth or a soft stuff neutral
detergent.
Software(Driver) installation CD ROM
Note
Samsung Electronics
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1 DCU(Diagnostic Control Unit)
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The following tools are recommended for safe and smooth troubleshooting described in this service manual.
Mind your hands not to be touched when
you disassemble and reassemble PBA ASS'Y,
such as the main board, SMPS, HVPS.
1-3
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