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DIGITAL LASER MFP
SCX-5312F
SCX-5112

SERVICE MANUAL

DIGITAL LASER MFP CONTENTS

1. Precautions

2. Specifications

3. Disassembly

4. Troubleshooting

5. Exploded Views and Parts List

6. Block Diagram

7. Connection Diagram
Precautions

1. Precautions
Follow these safety, ESD, and servicing precautions to prevent personal injury and equipment damage.

1-1 Safety Precautions
1. Be sure that all built-in protective devices are in 6. Observe the original lead dress, especially near
place. Restore any missing protective shields. sharp edges, AC, and high voltage power sup-
plies. Always inspect for pinched, out-of-place,
2. Make sure there are no cabinet openings or frayed wiring. Do not change the spacing
through which people-particularly children- might between components and the printed circuit
insert fingers or objects and contact dangerous board.
voltages.
7. Product Safety Notice:Some electrical and
3. When re-installing chassis and assemblies, be mechanical parts have special safety-related
sure to restore all protective devices, including characteristics which might not be obvious from
control knobs and compartment covers. visual inspection. These safety features and the
protection they provide could be lost if a replace-
4. Design Alteration Warning:Never alter or add to ment component differs from the original. This
the mechanical or electrical design of this equip- holds true, even though the replacement may be
ment, such as auxiliary connectors, etc. Such rated for higher voltage, wattage, etc.
alterations and modifications will void the manu-
facturer's warranty. 8. Components critical for safety are indicated in
the parts list with symbols .
5. Components, parts, and wiring that appear to Use only replacement components that have the
have overheated or are otherwise damaged same ratings, especially for flame resistance and
should be replaced with parts which meet the dielectric specifications. A replacement part that
original specifications. Always determine the does not have the same safety characteristics as
cause of damage or overheating, and correct any the original may create shock, fire, or other
potential hazards. safety hazards.

1-2 Precautions on Disassembly and Reassembly
Very careful precautions should be taken when 5. Do not force to open or fasten plastic material
replacing parts. Before replacing, please check components.
cables because you cannot put the cables that you 6. Be careful that small parts such as screws
removed for replacing parts into the proper place if should not get in the printer.
you would not make sure of where they were con- 7. When disassembling, assembling, also observe
nected and in which condition. small components are located in place.
8. If you uncover and turn the machine over to
Please do the following before disassembling for a replace some parts, toner or paper particles may
repair or replacement of parts. contaminate the LSU window. Protect the LSU
window with clean paper.
1. Pull out paper cassette, printer cartridge
installed. Especially careful not to be scratched Releasing Plastic Latches
by the surface of developer or not to expose
them to light. Many of parts are held in
2. Turn the power switch off. place with plastic latches.
3. Take out the power plug, printer cable from the The latches break easily :
printer. release them carefully.
4. Use only the same type of part as original when To remove such parts,
replacing parts. press the hook end of the
latch away from the part to
which it is latched.

Samsung Electronics 1-1
Precautions

1-3 ESD Precautions

1. Certain semiconductor devices can be easily 4. Use only a grounded tip soldering iron to solder
damaged by static electricity. Such components or desolder ESDs.
are commonly called "Electrostatically Sensitive Use only an "anti-static" solder removal device.
(ES) Devices", or ESDs. Examples of typical Some solder removal devices not classified as
ESDs are: integrated circuits, some field effect "anti-static" can generate electrical charges suffi-
transistors, and semiconductor "chip" compo- cient to damage ESDs.
nents.
5. Do not use Freon-propelled chemicals. When
The techniques outlined below should be fol- sprayed, these can generate electrical charges
lowed to help reduce the incidence of component sufficient to damage ESDs.
damage caused by static electricity.
6. Do not remove a replacement ESD from its pro-
CAUTION : Be sure no power is applied to the chassis tective packaging until immediately before install-
or circuit, and observe all other safety pre- ing it. Most replacement ESDs are packaged
cautions. with all leads shorted together by conductive
foam, aluminum foil, or a comparable conductive
2. Immediately before handling a semiconductor material.
component or semiconductor-equipped assem-
bly, drain off any electrostatic charge on your 7. Immediately before removing the protective
body by touching a known earth ground. Alterna- shorting material from the leads of a replace-
tively, employ a commercially available wrist ment ESD, touch the protective material to the
strap device, which should be removed for your chassis or circuit assembly into which the device
personal safety reasons prior to applying power will be installed.
to the unit under test.
8. Maintain continuous electrical contact between
3. After removing an electrical assembly equipped the ESD and the assembly into which it will be
with ESDs, place the assembly on a conductive installed, until completely plugged or soldered
surface, such as aluminum or copper foil, or con- into the circuit.
ductive foam, to prevent electrostatic charge
buildup in the vicinity of the assembly. 9. Minimize bodily motions when handling unpack-
aged replacement ESDs. Normal motions, such
as the brushing together of clothing fabric and
lifting one's foot from a carpeted floor, can gener-
ate static electricity sufficient to damage an ESD.

1-4 Super Capacitor or Lithium Battery Precautions
1. Exercise caution when replacing a super capaci- 3. Super capacitor or Lithium batteries contain toxic
tor or Lithium battery. There could be a danger of substances and should not be opened, crushed,
explosion and subsequent operator injury and/or or burned for disposal.
equipment damage if incorrectly installed.

2. Be sure to replace the battery with the same or 4. Dispose of used batteries according to the manu-
equivalent type recommended by the manufac- facture's instructions.
turer.

1-2 Samsung Electronics
Precautions

1-5 Tools for Troubleshooting

The following tools are recommended for safe and smooth troubleshooting described in this service manual.

1 DVM(Digital Volt Meter) 3 Driver
Standard: Indicates more than 3 digits. Standard: "-" type, "+" type (M3 long, M3 short, M2
long, M2 short).

4 Pinset
Standard: For general home use, small type.

2 Electronic Scale 5 Cotton Swab
Standard: Equipment to check the weight of consum- Standard: For general home use, for medical service.
ables(toner cartridge) supplied by Samsung Electron-
ics. (The gram unit can be measured.)

6 Cleaning Equipments a IPA(Isopropyl
Alcohol)dry cloth or a soft stuff neutral
detergent.

7 Software(Driver) installation CD ROM

Note : Mind your hands not to be touched when you
disassemble and reassemble PBA ASS'Y,
such as the main board, SMPS, HVPS.

Samsung Electronics 1-3
Specification

2. Specification
Specifications are correct at the time of printing. Product specifications are subject to change without notice.
See below for product specifications.

2-1 General Specifications

Item Description

Type of Unit Desktop

Operation System Win95/98/ME/ NT /2000/XP

Duplex Printing Yes(Default)

Interface IEEE1284(Nibbel/ECP)

USB(without HUB mode)

CPU 66 MHz(KS32C61200)

Emulation PCL6

Warming up Time 41 Sec (Stand-By), 25

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