Samsung ML-2150 User manual

SERVICE
LASER PRINTER
ML-2150
ML-2151N
ML-2152W
Manual
LASER PRINTER CONTENTS
1. Precautions
2. Reference Information
3. Specifications
4. Summary of product
5. Disassembly and Reassembly
6. Alignment and Adjustments
7. Troubleshooting
8. Exploded Views and Parts List
9. Block Diagram
10. Connection Diagram

1
1
1-1
Samsung Electronics
Precautions
Service Manual
1. Precautions
The cautions in the below are items needed to keep in mind when maintaining and servicing.
Please read carefully and keep the contents in mind to prevent accidents while servicing and prevent
any damages to the damage.
1.1 Warning for safety.
(1) Request the service by qualified service person.
The service for this machine must be performed by a service person who took the additional education of
this field. It is dangerous if unqualified service person or user tries to fix the machine.
(2) Do not rebuild it discretionary.
Do not attach or change parts discretionary. Do not disassemble, fix, and rebuilt it. If you do, printer will not
work and electric shock or a fire can be occurred.
(3) Laser Safety Statement
The Printer is certified in the U.S. to conform to the requirements of DHHS 21 CFR, chapter 1 Subchapter J
for Class 1(1) laser products, and elsewhere, is certified as a Class I laser product conforming to the
requirements of IEC 825. Class I laser products are not considered to be hazardous. The laser system and
printer are designed so there is never any human access to laser radiation above a Class I level during nor-
mal operation, user maintenance, or prescribed service condition.
Warning >> Never operate or service the printer with the protective cover removed from Laser/Scanner assembly. The reflected
beam, although invisible, can damage your eyes. When using this product, these basic safety precautions should
always be followed to reduce risk of fire, electric shock, and injury to persons.
CAUTION - INVISIBLE LASER RADIATION
WHEN THIS COVER OPEN.
DO NOT OPEN THIS COVER.
VORSICHT - UNSICHTBARE LASERSTRAHLUNG,
WENN ABDECKUNG GE FFNET.
NICHT DEM STRAHLAUSSETZEN.
ATTENTION - RAYONNEMENT LASER INVISIBLE EN CAS
D OUVERTURE. EXPOSITION DANGEREUSE
AU FAISCEAU.
ATTENZIONE - RADIAZIONE LASER INVISIBILE IN CASO DI
APERTURA. EVITARE LESPOSIZIONE AL
FASCIO.
PRECAUCION - RADIACION LASER IVISIBLE CUANDO SE ABRE.
EVITAR EXPONERSE AL RAYO.
ADVARSEL. - USYNLIG LASERSTR LNING VED BNING, N R
SIKKERHEDSBRYDERE ER UDEAF FUNKTION.
UNDG UDSAETTELSE FOR STR LNING.
ADVARSEL. - USYNLIG LASERSTR LNING N R DEKSEL
PNES. STIRR IKKE INN I STR LEN.
UNNG EKSPONERING FOR STR LEN.
VARNING - OSYNLIG LASERSTR LNING N R DENNADEL
R PPNAD OCH SP RREN R URKOPPLAD.
BETRAKTA EJ STR LEN. STR LEN R FARLIG.
VARO! - AVATTAESSA JA SUOJALUKITUS OHITETTAESSA
OLETALTTIINA N KYM TT M LLE LASER-
S TEILYLLE L KATSO S TEESEEN.

2
2
2-1
Samsung Electronics
REFERENCE INFORMATION
Service Manual
2. Reference Information
This chapter describes the reference information for applying this training manual, and it is consist-
ed of the tool list, the abbreviation table, the outline of model, and so on.
2.1 Tool for Troubleshooting
The following tools are recommended for safe and smooth troubleshooting described in this service manual.
Driver
Standard : "-" type, "+" type (M3 long, M3 short, M2 long,
M2 short).
4
Cotton Swab
Standard : For general home use, for medical ser-vice
6
Software(Driver) installation CD ROM
3Cleaning Equipments a IPA(Isopropyl
Alcohol)dry cloth or a soft stuff neutral
detergent
8
Spring Hook
Standard : For general use
7
Tweezers
Standard : For general home use, small type.
5
DVM(Digital Volt Meter)
Standard : Indicates more than 3 digits.
1
Electronic Scale
Standard : Equipment to check the weight of con-
sumables(toner cartridge) supplied by Samsung
Electronics. (The gram unit can be measured.)
2
Keep your hands not to be touched when
you disassemble and reassemble PBA
ASS'Y, such as the main board, SMPS,
HVPS.

3
3
3-1
Samsung Electronics
Specifications
Service Manual
3. Specifications
Product specifications are subject to change without notice.See below for product specifications.
3.1 General Specifications
ITEM DESCRIPTION
Print Method Non-impact Electro-photography
Development system Non-Magnetic, Mono-Component Toner
Transfer system Conductive roller transfer
Fuser Unit(Toner fix) Pressure and Heating with Lamp
*Print Speed Up to 20 PPM in A4 size, IDC 5% pattern
Up to 21 PPM in A4 size, IDC 5% pattern
Resolution Up to 600 x 600 DPI
Up to 1200 x 1200 DPI
Source of Light Laser diode (LSU : Laser Scanner Unit)
Warm-Up Time Power-on boot : 50 seconds or less
First Print Time 13 seconds or less
Feed Method Cassette & Manual , Option Feeder(SCF)
Media Size 76mm * 128mm(3 * 5”) to 216mm * 356mm(8.5 *14”)
Media Thickness Cassette : 16 ~ 28 lb, Manual : 16 ~43lb
Dimension(W X D X H) 480 X 522 X 516mm / 18.9 X 20.6 X 20.3 inch (without option cassette)
Weight Net : 13 Kg
Gross : 15.5 Kg
**Acoustic Noise Stand by : Less than 35 dB
Printing: Less than 53 dB
Sleep mode : Background Noise
Power save mode Enable
Toner save mode Enable
Consumption Parts Pick Up Roller Up to 100,000 pages
Transfer Roller Up to 100,000 pages
Fuser Assembly Up to 100,000 pages
Optional Parts SCF Paper Capacity : 500 Sheets
NIC Ethernet 10/100 base TX
(Ml-2150:Optional Protocols : TCP/IP, SPX/IPX, Ethertalk, SNMP,
ML-2151N : Basic) HTTP1.1, DLC/LLC
16MB RAM Buffer for faster graphics performance
2MB Flash Memory for upgrade
Throughput : 200 ~ 300K TCP/IP
SDRAM DIMM 16, 32, 64, 128MB 100PIN SDRAM DIMM
Postscript Flash ROM 4MB
802.11b Wireless LAN IEEE802.3b supportT
(ML-2152W Basic) Speed : 11, 5.5, 2, 1 Mbps
Protocol : CSMA/CD
Operation range : 30m(Indoors), 150m(Outdoors)

4
4
4-1
Samsung Electronics
SUMMARY OF PRODUCT
Service Manual
4. Summary of Product
This chapter describes the functions and operating principal of the main component.
4.1 Printer Components
4.1.1 Front View
Toner cartridge
(needed to access the
control board to install
printer options)
(Face down)
(500-sheet paper feeder)
(500-sheet paper feeder)
Control Panel
Top Cover
Paper level indicator
Control board cover
Multi-Purpose Tray
Output Support
Top output tray
Tray1
Optional Tray2

5
5
5-1
Samsung Electronics
Disassembly and Reassembly
Service Manual
5. Disassembly and Reassembly
5.1 General Precautions on Disassembly
When you disassemble and reassemble compo-
nents, you must use extreme caution. The close
proximity of cables to moving parts makes proper
routing a must.
If components are removed, any cables disturbed
by the procedure must be restored as close as
possible to their original positions. Before remov-
ing any component from the machine, note the
cable routing that will be affected.
Whenever servicing the machine, you
must perform as follows:
1. Check to verify that documents are not stored
in memory.
2. Be sure to remove the toner cartridge before
you disassemble parts.
3. Unplug the power cord.
4. Use a flat and clean surface.
5. Replace only with authorized components.
6. Do not force plastic-material components.
7. Make sure all components are in their proper
position.
Releasing Plastic Latches
Many of the 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.

6
6
6-1
Samsung Electronics
ALIGNMENT & ADJUSTMENTS
Service Manual
6. Alignment and Adjustments
This chapter describes the main functions for service, such as the product maintenance
method, the test output related to maintenance and repair, DCU using method, Jam removing
method, and so on. It includes the contents of manual.
6.1 How to use EDC (Engine Diagnostic Control) Mode
6.1.1 EDC Setup
• EDC(Engine Diagnostic Control, EDC will be used below) is considered to test and check whether each functions of
machinery and h/w module are normal or not.All of the test function are able to be controlled by the keys and LCD
window on the panel without any other kits.
• It’s developed for related engineers, not for users.
6.1.2 Entering/Exiting Method For EDC
<1> Outline
• The method for entering “EDC” mode is especial because it is intended for technicians and not users
• After Entering the mode, the message, “Engine EDC Mode” is displayed.
• On the mode, an engineer should press the “Menu Key” to search each function he would like to test.
• Turn the power off, after the test is entirely end.
<2> Usage
1. Power off the printer.
2. Pressing the “Select key”, power the printer on.
3. Keep pressing it until the message, “Engine EDC Mode” is shown on the panel.
4. Follow the usage for a function you would like to use.
5. Turn the power off, after the test is complete.
6.1.3 Usage & Function of Key on OPE
6.1.4 Usage & Function of LCD
Key Function Description Remarks
Menu Menu To enter the main Menu
Arrow (right) Search a Menu/ Input Data To search a Menu and input a data
Arrow (left) Search a Menu/ Input Data To search a Menu and input a data
Select Execute / Select To execute a function
Cancel Stop / Cancel To stop a function
Upper Level Move To move to the upper level
Line Characters Description Remarks
Top 16 Make engineers recognizing a test location.
[Main Menu] or [Function] is displayed.
Bottom 16 Make engineers recognizing a menu or function to be tested
A menu or function name displayed

7
7
7-1
Samsung Electronics
TROUBLESHOOTING
Service Manual
7. Troubleshooting
7.1 The cause and solution of Bad image
7.1.1 Vertical Black Line and Band
• Description 1. Straight thin black vertical line occurs in the printing.
2. Dark black vertical band occur in the printing.
Digital P inter
Digital P inter
Digital P inter
Digital P inter
Digital P inter
Check and Cause Solution
1. Damaged develop roller in the Toner car-
tridge. Deformed Doctor-blade or clean-
ing-blade.
2. Scratched surface of the discharge roller
in the toner cartridge.
3. Partly depression or deformation on the
surface of the transfer roller.
1. If causes 1 and 2 occur in the toner car-
tridge, replace the toner cartridge and try
to print out.
2. Replace the transfer roller if occurred as
No. 3.
7.1.2 Vertical White Line
• Description White vertical voids in the image.
Digita Printer
Digita Printer
Digita Printer
Digita Printer
Digita Printer
Check and Cause Solution
1. Foreign matter stuck onto the window of
internal lenses of LSU mirror.
2. Foreign matter or toner particles between
the toner cartridge roller and blade.
(In case the life of the toner cartridge has
been expired, white lines or light image
occur in front of the image.)
3. It may occur when Burr and foreign sub-
stances are on the window of the toner
cartridge frame.
4. If the fuser is defective, voids occur peri-
odically at the top of a black image.
5. It may occur when foreign substances
are on the OPC Drum.
1. Foreign matter stuck onto the window :
Clean the LSU window with recommend-
ed cleaner(IPA) Clean the window with a
clean cotton swab.
2.. Replace the toner cartridge.
3. No 3. : Remove the foreign matter and
burr of the exposure window.
(toner cartridge)
4. No. 4. : Open the front cover and check
ribs that corresponds to the position of
the voids. Remove if found.
5. If the problems are not solved, replace
the toner cartridge.

8
8
8-1
Samsung Electronics
EXPLODED VIEW & PARTS LIST
Service Manual
8. Exploded Views and Parts List
8.1 Main Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page(8-2)
8.2 Base-Houshing Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page(8-6)
8.3 Frame Assembly (0~32) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page(8-7)
Frame Assembly (33~67) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page(8-8)
8.4 Fuser Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page(8-13)
8.5 Main Driver Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page(8-16)
8.6 Exit Driver Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page(8-17)
8.7 Regi Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page(8-18)
8.8 SMPS Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page(8-19)
8.9 Cassette Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page(8-21)
8.10 SCF Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page(8-23)

8-2
EXPLODED VIEW & PARTS LIST
Samsung Electronics
Service Manual
8.1 Main Assembly
0
3
2-1
2-2
2
4
5
3-1
3-2
3-3
3-4
3-4
3-5
3-6
1
14
14-2
14
17
17
9
1
20
38
24 2
2
21