Samsung ML-2500, ML-2510, ML-2570, ML-2571N Service Manual
LASER PRINTER
ML-2500 Series
ML-25 10/XAA
Basic Model :ML-2571N
Manual
SERVICE
LASER PRINTER
- Speed : 25ppm (Ltr) / 24ppm(A4), 600dpi
- Paper Path : MPF Type Cassette
- Emulation : SPL (ML-2510)
PCL (ML-2570/ML-2571N)
- Processor : 150MHz Jupiter4e CPU
400MHz SPGP V
- Memory : ML-2510(SDRAM, 8MB),
ML-2570/2571N(SDRAM, 32MB)
- MP Cassette : 250 pages / Face Down
(100 pages)
- Fuser Design : Lamp Type
The keynote of Product
3 CPU
ML-2571N
- I/O : ML-2510(USB1.1+IEEE 1284),
ML-2570/2571N(USB2.0+IEEE 1284)
- Machine Life : 50K(pages)
Contents
1. Precautions
1.1 Safety Warning 1-1
1.2 Safety Caution
1-2
1.3 ESD Precautions
1-4
2. Product Specification
2.1 Product Overview 2-1
2.2 Specifications
2-1
2.3 Model Comparison Table
2-5
2.4 ACCESSORY
2-5
3. System Overview
3.1 System Outline 3-1
3.2 H/W Structure and Descriptions
3-7
3.3 S/W Structure and Descriptions
3-23
3.4 Initial Product Installation
3-27
4. Alignment and Adjustments
4.1 Sample Pattern 4-1
4.2 Control Panel
4-2
4.3 Consumables and Replacement Parts
4-4
4.4 Periodic Defective Image
4-5
4.5 How to use DCU
4-6
4.6 Paper Path
4-1 1
5. Disassembly and Reassembly
5.1 General Precautions on Disassembly 5-1
5.2 Disassembly and Reassembly
5-2
6. Troubleshooting
6.1 Checking Symptoms 6-1
6.2 Bad discharge
6-4
6.3 Malfunction
6-8
6.4 Bad software environment
6-13
6.5 Bad Image
6-17
7. Exploded Views & Parts List
7.1 Exploded Views and Parts List 7-1
8. Block diagram
8.1 ML-2510 H/W Block Diagram 8-1
8.2 ML-2570/2571N H/W Block Diagram
8-2
9. Connection Diagram
9.1 ML-2510 Connection Diagram 9-1
9.2 ML-2570/2571N Connection Diagram
9-2
10. Schematic Diagram
10.1 PCL_Main Board 10-1
10.2 GDI_Main Board
10-6
10.3 Connector Circuit Diagram
10-17
10.4 SMPS Circuit Diagram
10-18
10.5 HVPS Circuit Diagram(1/3)
10-19
Continued
1 1. Reference Information
1 1 .1 T roubleshooting Tools 11-1
1 1 .2 Acronyms and Abbreviations
11-2
1 1 .3 Selecting printer locations
11-4
1 1 .4 Sample Tests Patterns
11-5
12. Circuit Description
12.1 Engine Controller 12-1
Continued
Precautions
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Service Manual
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1
1. Precautions
The cautions 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 to prevent the
machine from getting damaged.
1.1 Safety Warning
(1) Request service by qualified service person.
Service for this machine must be performed by a Qualified service person. It is dangerous if unqualified service personnel or users try to fix the machine.
(2) Do not rebuild.
Do not attach or change parts discretionary. Do not dissemble, fix of rebuilt it. If so, printer will abnormally
work and electric shock or fire may occur.
(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 normal 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.
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Service Manual
Precautions
1-2
1.2 Safety Caution
1.2.1 Noxious Material Precaution
The toner in a printer cartridge contains a chemical material, which may harm human body if it is swallowed.
Please keep children out of reach of the toner cartridge.
1.2.2 Electric Shock or fire Precaution
It is possible to get electric shock or burn by fire if you don't fallow the instructions of the manual.
(1) Use exact voltage. Please use an exact voltage and wall socket. If not, a fire or an electric leakage can be
caused.
(2) Use authorized power cord. Do use the power cord supplied with PRINTER. Afire can happen when over cur-
rent flows in the power cord.
(3) Do not insert many cords in an outlet. A fire can be occurred due to flow over current in an outlet.
(4) Do not put water or extraneous matter in the PRINTER. Please do not put water, other liquid, pin, clip, etc. It
can cause a fire, electric shock, or malfunction. If this occurs, turn off the power and remove the power plug
from outlet immediately.
(5) Do not touch the power plug with wet hand. When servicing, remove the power plug from outlet. Do not insert
or take off it with wet hand. Electric shock can be occurr.
(6) Caution when inserting or taking off the power plug. The power plug has to be inserted completely. If not, a fire
can be caused due to poor contact. When taking off the power plug, grip the plug and take it off. If grip the line
and pull over, it could be damaged. A fire or electric shock could happen.
(7) Management of power cord. Do not bend, twist, or bind it and place other materials on it. Do not fix with sta-
ples. If the power cord gets damaged, a fire or electric shock can happen. A damaged power cord must be
replaced immediately. Do not repair the damaged part and reuse it. A repaired part with plastic tape can be
cause a fire or electric shock. Do not spread chemicals on the power cord. Do not spread insecticide on the
power cord. A fire or electric shock can be happen due to thinner(weak) cover of the power cord.
(8) Check whether the power outlet and the power plug are damaged, pressed, chopped, or blazing fire or not.
When such inferiorities are found, repair it immediately. Do not make it pressed or chopped when moving the
machine.
(9) Caution when there is thundering or lightning, and being flash of lightening. It causes a fire or electric shock.
Take the power plug off there is thunder. Do not touch cable and device when thundering and flash of lighten-
ing.
(10) Avoid the place where is moisture or has dust. Do not install the printer where lots of dust or around humidifi-
er. Afire can occurred. A plug part need to clean well with dried fabric to remove dust. If water drops are
dripped on the place covered with dust, a fire can occurred.
(1 1) A void direct sunlight. Do not install the printer near window where direct contacts to the sunlight. If the
machine contacts sunlight long time, the machine cannot work properly because inner temperature of the
machine is getting hotter. Afire can occur.
(12) Turn off the power and take off the plug when smoke, strange smell, or sound from the machine. If you keep
using it, a fire can be occurred.
(13) Do not insert steel or metal piece inside/outside of the machine. Do not put steel or metal piece into a ventila-
tor. An electric shock could happened.
Precautions
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Service Manual
1-3
1.2.3 Handling Precautions
If you ignore this information, you could harm machine and could be damaged.
(1) Do not install it on different levels, or slanted floor.
Please confirm whether it is balanced or not after installation. If it is unbalanced, an accident can be hap-
pened due to the machine falling over.
(2) Be careful not to insert a finger or hair in the rotating unit.
Be careful not to insert a finger of hair in the rotating unit (motor, fan, paper feeding part, etc) while the
machine is operating. Once it happens, you could be harmed.
(3) Do not place a pot containing water/chemical or small metals. If they got caught into the inner side of
machine, a fire or electric shock can be occurred.
(4) Do not install it where lots of moisture or dust exists or where raindrop reaches. A fire or electric shock
can be caused.
(5) Do not place a candlelight, burning cigarette, and etc. on the machine. Do not install it near to heater. A
fire can be occurred.
1.2.4 Assembly/Disassembly precaution
When replacing parts, do it very carefully. Memorize the location of each cable before replace parts for reconnecting it afterwards. Memorize. Please perform the steps below before replace or disassembly the parts.
(1) Check the contents stored in the memory. All the information will be erased after replacing main board.
The information needed to keep has to be written down.
(2) Before servicing or replacing electric parts, take off plug.
(3) Take off printer cables and power cord connected to printer.
(4) Use formal parts and same standardized goods when replacing parts.Must check the product name,
part cord, rated voltage, rated current, operating temperature, etc.
(5) Do not over-force when release or tighten up the plastic parts.
(6) Be careful not to drop small parts such as screws in the printer.
(7) Be careful not to change the location of small parts such as screws when assembling and disassembling.
(8) Remove dust or foreign matters completely to prevent fire of tracking, short, or etc.
(9) After finished repair, check the assembling state whether it is same as before the repair or not.
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Service Manual
Precautions
1-4
1.3 ESD Precautions
Certain semiconductor devices can be easily damaged by static electricity . Such components are commonly called
“Electrostatically Sensitive (ES) Devices”, or ESDs. Examples of typical ESDs are: integrated circuits, some field
effect transistors, and semiconductor “chip” components.
The techniques outlined below should be followed to help reduce the incidence of component damage caused by
static electricity.
Caution >>Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
1. Immediately before handling a semiconductor component or semiconductor-equipped assembly , drain off any
electrostatic charge on your body by touching a known earth ground. Alternatively , employ a commercially available wrist strap device, which should be removed for your personal safety reasons prior to applying power to the
unit under test.
2. After removing an electrical assembly equipped with ESDs, place the assembly on a conductive surface, such
as aluminum or copper foil, or conductive foam, to prevent electrostatic charge buildup in the vicinity of the
assembly .
3. Use only a grounded tip soldering iron to solder or desolder ESDs.
4. Use only an “anti-static” solder removal device. Some solder removal devices not classified as “anti-static” can
generate electrical charges sufficient to damage ESDs.
5. Do not use Freon-propelled chemicals. When sprayed, these can generate electrical charges sufficient to dam-
age ESDs.
6. Do not remove a replacement ESD from its protective packaging until immediately before installing it. Most
replacement ESDs are packaged with all leads shorted together by conductive foam, aluminum foil, or a comparable conductive material.
7. Immediately before removing the protective shorting material from the leads of a replacement ESD, touch the
protective material to the chassis or circuit assembly into which the device will be installed.
8. Maintain continuous electrical contact between the ESD and the assembly into which it will be installed, until
completely plugged or soldered into the circuit.
9. Minimize bodily motions when handling unpackaged replacement ESDs. Normal motions, such as the brushing
together of clothing fabric and lifting one’s foot from a carpeted floor, can generate static electricity sufficient to
damage an ESD.
Product Specifications
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Service Manual
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2
2
Item Descriptions Remark
Basic Model ML-2571N
Series Model ML-2510, ML-2570
Market of Sailes Persnal user Laser printer.(Low Price for small work Group.)
Specification
24ppm(Ltr. 25ppm), Jupiter 4e 150MHz, 8Mbytes SDRAM,
SPGP V3 400MHz, 32Mbytes SDRAM
1K(initial), 3K(sailes)
USB 1.1 (Compatible with USB 2.0) + IEEE 1284 Parallel : ML-2510
USB 2.0 + IEEE 1284 Parallel : ML-2570, ML-2571N
250pages feeding, 100pages Face Down
2.2 Specifications
Product Specifications are subject to change without notice. See below for product specifications.
2.2.1 General Specifications
Item Descriptions
Print Method Electro-photographic Printing
Developing system
Non-Magnetic, Mono-Component Developing System
Print Speed 24 PPM : A4 size
25 PPM (Letter size)
Resolution True 1200 X 600 DPI, 1200 X 1200(ML-2570/2571N)
Source of Light Laser diode (LSU : Laser Scanning Unit)
Warm-Up Time Cold Warm-up : 15sec, Sleep mode : 15sec
First Print Time Less than 9 seconds (Ready to 1st page out)
Feed Method Cassette & Manual
Media Size 76 X 128mm (3 x 5”) to 216 X 356mm (8.5 X 14”)
Paper thickness Cassette : 16 ~28 lb , Manual Feeder : 16 ~ 43 lb
Size(W X D X H) 352 X 298 X 243 mm
Weight Net : 5.6Kg with out toner cartridge(W/O)
Gross : 8.7Kg(41Ib)
Acoustic Noise Stand by : Less than 35 dB
Printing : Less than 53 dB
Power save mode Yes
Toner save mode Yes
Machine Life 50,000pages
2. Product Specifications
2.1 Product Overview
Samsung Electronics
Service Manual
Product Specifications
2-2
Item Descriptions
Periodic Replacing Parts Pick Up Roller : 50,000 Pages
Same with Machine Life Transfer Roller : 50,000 Pages
Fuser Assembly : 50,000 Pages
Toner Sensor No
Toner Type Non-Magnetic Contact System
Toner Initial 1,000 sheets@ISO 19752 Standard coverage
Toner sale 3,000 sheets@ISO 19752 Standard coverage
Cassette - Paper capacity : 250sheets
- Paper weight : 60 ~ 163 g/
/ 16 ~ 43 lbs
2.2.2 Controller
Item Descriptions
Processor(CPU) Jupiter 4e 150MHz/SPGP V3 400MHz
Memory Standard/Max. : 8MB(Max. 8MB) - ML-2510/32MB(Max. 32MB) - ML-2570/2571N
Type : SDRAM
Expand Memory Slot, Type : NO
Compression Technology : MET(Memory Enhancement Technology)
(Emulation) Standard : SPL/PCL
Auto Emulation Sensing : YES
(Interface) USB 1.1 (Compatible with USB 2.0)+IEEE 1284 for ML-2510,
USB 2.0+IEEE 1284 for ML-2570/2571N
Option : NO
Auto Interface Sensing : YES
Font Type : Windows Fonts
Number : NO
Test Print Demo Mode : Press the Demo Key for 2 Seconds
Configration Mode : Press the Demo Key for 4 Seconds
Cleaning Mode : Not Support
Service Mode : Press the Demo Key when Power on(F/W Download)
ML-2510 model : I/O Support(USB 1.1 + IEEE 1284 Parallel port)
ML-2570/2571N model : I/O Support(USB 2.0 + IEEE 1284 Parallel port)
Product Specifications
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Service Manual
2-3
2.2.3 Electrical Specification
Item Descriptions Remark
Input Voltage Nominal input voltage 220~240 VAC
Input voltage range 198~255 VAC
Nominal frequency 50/60 MHz
Frequency tolerance +3Hz
Power Consumption Printing : 390W Ave(Max. 400W) - 2510 Model
400W Ave(Max. 420W) - 2570/2571N Model
Idling : 65W Ave or less-ML-2510 Model
70W Ave or less-ML-2570/2571N Model
Power Save : 6.5W Ave or less-ML-2510 Model
8.5W Ave or less-ML-2570/2571N Model
2.2.4 Environmental Range
Item Operating Storage
Temperature 10~30 oC(50-90 oF) -20~40 oC (-4~104 oF)
Humidity 20~80%RH 10~80%RH
2.2.5 T oner Cartridge
Item Descriptions Remark
Life span Starter: 1,000 Pages(initial) A4 Size, ISO 19752 Pattern
Running : 3,000 Pages(sailes) Standard Coverage SIMPLEX
Developing Method Non-magnetic Contact Developing
Charging Method Conductive Roller Charging
Toner Empty sensor No
Ozone 0.1PPM or less
Cartridge Style Single cartridge
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Service Manual
Product Specifications
2-4
2.2.6 Paper Handling Specifications
Please refer to Paper Secifications on user Guide.
2.2.6.1 Input Paper Size
2.2.6.2 Input capacity
2.2.6.3 Output capacity
Paper paper size Cassette
A4 210 X 297 mm O
Letter 216 X 279(8.5 X 11") O
US Folio(Legal13") 216 X 330(8.5 X 13") O
Legal(Legal14") 216 X 356(8.5 X14") O
Executive 184 X 267((7.25 X10.5") O
Statement 140 X 216(5.5 x8.5") O
ISO B5 176 X 250 O
JIS B5 182 X257 O
A5 148 X 210 O
A6 105 X148 O(
)
No.10 Env. 105 X 241(4.15 X 9.5") O( )
Monarch Env. 98 X191(3.87 X 7.5") O( )
DL Env. 110 X 220(4.33 X 8.66") O( )
C5 Env. 162 X 229(6.38 X 9.01") O( )
C6 Env. 114 X 162(4.49 X 6.38") O( )
Transparency(OHP) A4 or Letter O( )
Label paper A4 or Letter O( )
Item Descriptions
Cassette 250 sheets
Product Specifications
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Service Manual
2-5
2.3 Model Comparison Table
Model Name ML-2510 ML-2570 ML-2571N
Company Samsung Samsung Samsung
Printing Process
Print Method: Electrophotographic Laser Electrophotographic Laser Electrophotographic laser
Print Speed Up to 24ppm in A4, Up to 25ppm in letter Up to 24ppm in A4, Up to 25ppm in letter Up to 24ppm(A4)
FPOT 9sec 9sec 9sec
Resolusion 1200x600 1200x1200 1200x1200
Duty Cycle, Monthly up to 5000 prints per month up to 5000 prints per month up to 15,000 prints per month
Hardware Software
Processor Type Samsung Jupiter 4e 150MHz Samsung SPGP V3 400MHz Samsung SPGP V3 400MHz
Memory 8MB(8MB) 32MB SDRAM(32MB) 32MB SDRAM(32MB)
OS
Win9X/ME/2000/XP/Linux7/NT4.0/Mac OS8.6 Win9X/ME/2000/XP/Linux7/NT4.0/Mac OS8.6
Win9X/ME/2000/XP/Linux7/NT4.0/Mac OS8.6
Standard Emulations SPL PCL PCL
Interface Support
Standard Interfaces USB 1.1(Compatible with USB 2.0)+ USB 2.0 USB 2.0
IEEE 1284 Parallel IEEE 1284 Parallel IEEE 1284 Parallel
Cable Not Supply(KOR,CHINA is Supply)
Optional Interfaces N/A N/A N/A
Paper Handling
Standard Paper Input 250 Sheets Multi-purpose Tray 250 Sheets Multi-purpose Tray 250 Sheets Multi-purpose Tray
Paper Output Face down : 100 Sheet(TBD) Face down : 100 Sheet(TBD) 100 Sheet Face Down Tray
Duplexing Manual Manual Manual
Paper Weight :
- Plain paper 16 to 24 lb. Bond(60 to 90g/m2) 16 to 24 lb. Bond(60 to 90g/m2) 16 to 24 lb. Bond(60 to 90g/m2)
- Thick stock 24 - 90 lb. Index(163g/m2) 24 - 90 lb. Index(163g/m2) 24 - 90 lb. Index(163g/m2)
Physical
Type Laser Printer with Internal Controller Laser Printer with Internal Controller Laser Printer with Internal Controller
Dimensions w/output
352mm x 298mm x 243mm 352mm x 298mm x 243mm 352mm x 298mm x 243mm
tray extended(WxDxH)
Weight(without cartridge)
5.6kg 5.6kg 5.6kg
Carton Dimensions
455mm x 415mm x 325mm 455mm x 415mm x 325mm 508mm x 425mm x 265mm
(WxDxH)
Weight(as shipped) 8.7kg 8.7kg 8.7kg
Electical
Power Requirements
Power Consumption Power Consumption Power Consumption Power Consumption
390W printing, 6.5W Down Sleep Mode 400W printing, 8.5W Down Sleep Mode 400W printing, 8.5W Down Sleep Mode
Energy Star* Compliant
Yes Yes Yes
Environmental
Temprature :
- Operating 10 to 32 10 to 32 10 to 32
- Non-Operating 0 to 40 0 to 40 0 to 40
Humidity :
- Operating : 20% to 80% RH : 20% to 80% RH : 20% to 80% RH
- Non-Operating : 20% to 80% RH : 20% to 80% RH : 20% to 80% RH
Noise Level :
Operating Operating : <53dB(A), Standby : <35dB(A) Operating : <53dB(A), Standby : <35dB(A) Operating : <53dB(A), Standby : <35dB(A)
Consumables
Starter
up to 1,000 pages(A4/Letter) at ISO 5% coverage
up to 1,000 pages(A4/Letter) at ISO 5% coverage
up to 1,000 pages(A4/Letter) at ISO 5% coverage
continuous printing. continuous printing. continuous printing.
Replacement up to 3,000 pages(A4/Letter) at ISO 5% coverage up to 3,000 pages(A4/Letter) at ISO 5% coverage
up to 3,000 pages(A4/Letter) at ISO 5% coverage
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Service Manual
Product Specifications
2-6
*. These model are as yet undeveloped.
Acessory Code Quantity
INA-ACCESSORY JC99-01993J -
S/W APPLICATION-CD JC46-00287A 1
COVER-M_PAPER (PAPER COVER) JC63-01119A 1
MANUAL-(CARD)WARRANTY CARD JC68-00690A 1
Acessory Code Quantity
INA-ACCESSORY JC99-01986C -
S/W APPLICATION-CD JC46-00291A 1
COVER-M_PAPER (PAPER COVER) JC63-01119A 1
MANUAL-(CARD)WARRANTY CARD JC68-00690A 1
System Overview
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Service Manual
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3
3
3. System Overview
3.1 System Outline
Paper Path Layout
12
14
13
BIN PATH
MAIN PBA
SMPS HVPS
13
12
14
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Service Manual
System Overview
3-2
Unit Layout
HVPS
SMPS
Main PBA
Motor
LSU
Panel
System Overview
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Service Manual
3-3
3.1.1 Feeding
There are the C-path type, which loads papers, and the manual feeder, which supplies paper one by one.The
cassette has the function pad which separates paper one by one, and it has the sensor function to check the
existence of the loading paper.
1) Feeding Type : MPF Type
2) Feeding Standard : Center Loading
3) Feeding Qty : Cassette 250 sheets (75g/ , 20lb paper standard)
4) Manual 1 sheet (Paper, OHP, Envelope etc.)
5) Separating Type : Cassette - Friction Pad Type
6) Manual : None
7) Driver Type : Driving by Gearing from Main Motor
8) Pick_up Roller Driver : Solenoid
9) Paper detecting Sensor : Photo Sensor
10) Paper Size Sensor : None
11) Paper Exit Type : Face Down
3.1.2 T ransfer Ass’y
The transfer roller delivers the toner of the OPC drum to the paper.
- The life span : Print over 50,000 sheets (in 16 ~30 )
3.1.3 Driver Ass’y
It is a power delivery unit by gearing. By driving the motor, it supplies the power to the feeding unit, the fusing unit,
and the distributing unit.(Motor drive IC : A3977)
- It is a power delivery unit by gearing : Feeder/Developer Motor Fuser/Exit
3.1.4 FUSER
The fuser is consisted of the Heat Lamp,Heat Roller,Pressure Roller,Thermister and Thermostat.
It adheres the toner on the paper with pressure and heat to complete the printing job.
- Life Cycle : 50K(pages)
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Service Manual
System Overview
3-4
1) Heat Lamp
. Heat Lamp Terminal Shape : Terminal Single Type
. Voltage 120 V : 115 + /- 5 %
220 V : 230 + /- 5 %
. Capacity : 750 Watt + /- 30 W
. Life : 3000 Hr
2) Thermostat
. Thermostat Type : Non-Contact type THERMOSTAT
. Control Temperature : 150 5
3) Thermistor
. Thermistor Type : FS-50004 (SEMITEC 364Fs Type)
. Temperature Resistance : 7 (180 )
. SYSTEM Temperature SETTING
- Stand by : 160 + /- 5
- Printing : 180 + /- 5 (before 30pages)
75 + /- 5 (after 30pages)
- Overshoot : 200 or less
- Overheat : 210 or less
4) Heat roller
. Length : 254 mm
. Valid length : 222 mm
. GND Type : H/R Bearing Grounding type By SECC Fuser frame
5) Pressure roller
. Shaft
- Length : 239.5 mm
. Rubber
- Length : 222 mm
6) Paper separation method
Teflon Coating with mold Claw System
7) Safety Relevant Facts
. Protecting device when overheating
- 1st protecting device : H/W cuts off when detecting an overheating
- 2st protecting device : S/W cuts off when detecting overheating
- 3st protecting device : Thermostat cuts off the power
. Safety device
- The power of Fuser is cut-off after front cover is open.
- The overheating safety device for customer
- The surface temperature of the Fuser Cover is under 80
System Overview
Samsung Electronics
Service Manual
3-5
3.1.5 LSU (Laser Scanner Unit)
The LSU unit is controlled by video controller. It scans the video data received from video controller with laser beam
by using the rotation principle of the polygon mirror to create the latent image on the OPC drum. It is the core part of
LBP.
The OPC drum rotates as the same speed as the paper feeding speed. It creates the /HSYNC signal and sends it
to the engine when the laser beam of the LSU reaches the end of the polygon mirror, and the engine detects the
/HSYNC signal to arrange the vertical line of the image on the paper. After detecting the /HSYNC signal, the image
data is sent to the LSU to arrange the its margin on the paper. The one side of the polygon mirror is one line for
scanning..
OPC Drum
Photo Diode
LD Driver circit
Protector panel
LD(Laser Diode)
Polygon Mirror
Polygon Motor
Motor Driver
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Service Manual
System Overview
3-6
3.1.6 T oner Cartridge
By using the electronic photo process, it creates a visual image. In the toner cartridge, the OPC unit and the
developer unit are in a body. The OPC unit has OPC drum and charging roller, and the developer unit has toner,
toner cartridge, supply roller, developing roller, and blade (Doctor blade)
- Developing Method: Non magnetic 1 element contacting method
- Toner: Non magnetic 1 element shatter type toner
- The life span of toner: 3,000 sheets (ISO 19752 Pattern/A4 standard)
- Toner Cartridge : Initial(1,000), Sales(2,000)
- Toner remaining amount detecting sensor: None
- OPC Cleaning: Collect the toner by using electric static + FILM OPC
- Management of disusable toner: Collect the toner by using electric static (Clenerless Type- No disusable
toner)
- OPC Drum protecting Shutter: None
- Classifying device for toner cartridge: ID is classified by interruption of the frame channel.
System Overview
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Service Manual
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3.2 H/W Structure and Descriptions
3.2.1 H/W Overview
ML-2510/2570/2571N is roughly made up Main Control part and SMPS/HVPS part.
Main Controller uses Jupiter4E for ML-2510 and SPGP V3 for ML-2570/2571N, which is on chip micro controller
and developed for Low-end Laser Beam Printer.
Jupter4E and SPGP V3 provide provides the integrated printing functions such as Printer video controller, Laser
Scan Unit controller, PWM controller and Bi-polar Stepper Motor Controller and has USB and IEEE 1284 Parallel
Interface capacity.
3.2.1.1. Main Control
ML-2510/2570/2571N of Main Control are composed of CPU and Print and operate follows function by CPU
- Bus Control, I/o
- Handling, each Driver and PC Interface
Main Control operate its full function on the Main B'd and CPU control Controller ASIC.
3.2.1.2 CPU
ML-2510 Use 32Bit RISC Processor of Jupiter4e, which is built in Memory, while ML-2570/2571N sue
SPGP V3, They control system by operating operation block of the system.
SMPS
HVPS
Jupiter IV ASIC for 2510
SPGP V3 for 2570/2571N
V1.1 USB for 2510
V2.0 USB for 2570/2571N
Printer Engine B’D
DRAM 8M Byte for 2510
32MByte for 2570/2571N
Flash Memory for 2510
8MByte for 2570/2571N
OPE B’D
(Build-in HVPS)
Main Controller
LSU
Motor
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Service Manual
System Overview
3-8
- Main Function Block: Completely Integrated System for Embedded Applications,
32 Bit Risc Architecture for ML-2510 and ARM10 CPU for
ML-2570/2571N ARM9 CPU
LSU Interface Module for Interfacing PVC with LSU
2 Channel General Purpose DMA Controller for High Speed I/O
Dual Memory Bus Architecture
- Operation Frequency : 150MHz for ML-2510/400MHz for ML-2570/2571N
- Operation Voltage : 3.3V
- POWER ON RESET TIME : 6.6ms below
3.2.1.3 Flash Memory
Store System Program and can be down load System Program through PC Interface
- Capacity : 8M Byte for ML-2570/2571N, ML-2510 uses 0.5M Byte ASIC built flash memory
- Access Time : 70 nsec
3.2.1.4 DRAM
When Printing, use Band Buffer, System Working Memory Area .
- 8M capa : 8M Byte basic for ML-2510
8M :Printing System Working Memory Area
- 32M capa : 32M Byte basic for ML-2570/2571N
32M :Printing System Working Memory Area
- Access Time : 60 nsec
3.2.1.5 ENGINE
This recording method is electrophography method using LSU, which toner is composed of 1 component
and non magnetic.
1) Recording Method : LSU(Laser Scanning Unit)
2) Printing Speed :24ppm
(In continuing printing base A4, printing pages from 2nd to last during 1min)
3) Recording Density : 1200 x 600dpi
4) Cassette Capa. : Cassette : 250sheets(75g Base),
Manual : N/A((DRIVE Selection : Paper, OHP, Envelop - 1 sheet)
5) Paper Size : Cassette ,Manual; Width = 76 ~ 216mm, Length = 125mm ~ 356mm
6) Effective recording size
- A4 : 202 x 291 mm
- Letter : 208 x 273 mm
- Legal : 208 x 350 mm
- Folio : 208 x 325 mm
- Top Margin : 4.23 ° 3 mm
- Left, Right Margin : 4.23 ° 3 mm
7) CRU(Toner Cartridge)Life : 3,000pages Printing(A4, 5% Pattern Printing)
8) First Print Out Time : within 9sec( Standby )
9) Warming up time : within 15sec (Ambient : 25° )
System Overview
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3-9
3.2.2 Main Board
Main Board are composed of Engine and Controller on the one-Board.
Main Board control to send Current Imagedml Video Data to LSU to print and have motor Driving and Circuit for the
current driving and also include Paper Exit Sensor, Cover Open s/w, panel s/w.
< ML-2510 >
< ML-2570/2571N >
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U6(Jupiter 4E for ML-2510 and SPGP V3 for ML-2570/2571N)
- ML-2510 use Jupiter4E which has a CPU core CLK with over 150MHz and a System bus 80MHz.
- It use 3.3V for operation voltage and I/O, It uses 80MHz for system bus CLK, Built in Flash Memory.
- ML-2570/2571N use SPGP V3 which has a CPU core CLK with over 400MHz and a System bus 100MHz.
SDRAM
- Main memory. SDCLK is 75Mhz for ML-2510, SDCLIC is 100Mhz for ML-2570/2571N.
A3977
- It is an Main motor driver IC and controls the motion of main motor.
Regulator
- It Supplies the core voltage to CPU by converting 3.3V to 1.8V for ML-2510
EEPROM(U8 : 93C66 for ML-2510, 24C32 for ML-2570/2571N.
- It is an EEPROM with 12C method.
SMPS connector(CN8)
- It connects SMPS, supplies the power, and delivers the high voltage contol signal, etc. If a harness is not normally
connected to this connector, power cannot be supplied.
LSU connector(CN12)
- It connects a LSU.
DC Motor connector(CN11)
- It connects an main motor and drive a DC motor.
HVPS connector(CN10)
- It connects a HVPS.
DCU connector(CN1)
- It interface a DCU-JIG
USB connector(CN6)
- It interface the computer.
Network Connector(ML-2571N only)
- It interface the network
IEEE 1284 Parallel Connector
- It interface the computer.
DC To DC Converter
- It supplies the core sltage to CPU
by Converting 3.3V to 1.3V for ML-2570/2571N
System Overview
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Service Manual
3-11
3.2.3 Asic(Jupiter 4E) Specification
3.2.3.1 Introduction
Jupiter4E is One-Chip micro-Controller for Low cust Laser beam Printer.
1. One Chip Laser Beam Printer Controller
- GDI only
- AMBA AHB used for high speed bus transactions between masters and slaves
- AMBA APB used for low speed bus transactions between ARM core and peripherals
- 3 PLLs ( 2 Dithered PLL and 1 General PLL)
first for CPU(150MHz), AHB(75MHz), APB(75MHz),
second for USB(48MHz)
third for PVC(59MHz)
- 75MHz system operation
- 1.8V power operation
- 3.3V tolerant input and bi-directional I/Os
- SDRAM and IO Address / Data signals multiplexing
2. Integrated ARM940T 32-bit RISC embedded processor core
- 75MHz core frequency operation
- Harvard Architecture Cache : 4KByte Instruction cache, 4KByte Data cache
- Single memory bus architecture
3. Built in Flash Memory
- 4MBits (128Kx32bits)
- Serial programming mode using flash programmer tool
- Internally flash memory read / write operation support
- Programmable access timing control
4. 32MB Special function Register Area
5. Directly connected to 3 external IO banks (IOC)
- 32 MB size in each IO bank
- Programmable setup, access, hold timing
- Programmable recovery time for slow devices
- Allows to access peripheral devices such as GPIO control logic
6. Directly connected to 1 external ROM bank (ROMC)
- 32 MB size for one ROM bank
- One external flash memory attachable.
7. Directly connected to two SDRAM banks (SDRAMC)
- Extensible architecture
- Two external SDRAM attachable.
- SDRAM controller supports PC-100 and PC-133 SDRAM running at 75MHz
- Up to 32MB per bank.
- Support for SDRAM configurations including programmable column address
- Programmable refresh interval
8. Interrupt Controller (INTC)
- FIQ or IRQ mode operation selectable
- Programmable Interrupt Enable/Disable
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9. USB interface
- Version 1.1
- Four 128x8 FIFOs for Data transmission.
- Interrupt based input / output interface, no DMA based interface support
- USB wrapper for AHB interface
- AHB Bus interface
10. Serial port interface (UART)
- Programmable Baud Rate
- 2 channel Independent Full Duplex UART
- Polling, Interrupt based operation support
- Max 16 byte FIFO to handle SIR Bit Rate Speed
11. Printer video controller for LBP engines (PVC)
- 20MHz video rate (Hummingbird 2 : letter - 21 ppm, A4 : 20ppm)
- video data transmitted through LSU Controller
12. Laser Scan Unit (LSU) Controller
- Laser Scan Unit (LSU) Interface for Laser Diode turn on/off timing control
- Sample & hold period generation.
- Auto Power Control for Laser Diode with PID control method using internal 10 bits DAC.
- LSU clock generation
- Brushless DC motor control clock generation
13. ADC Interface
- 4 channels ADC interface for analog devices such as temperature sensor.
- Programmable ADC Clock Cycle.
- Automatic or Manual AD Conversion support.
- 4 Special Function Registers for monitoring the ADC results for 4 channels.
14. PWM Controller
- 4 PWM output ports - THV, BIAS, FAN control and AC ELECTRIFICATION
15. Bi-polar Stepper Motor controller (MOTORC)
- Phase generation for the purpose of paper feeding
- fixed hardware phase and current table
- programmable phase and interval time
- Interrupt based phase change operation
16. Timer
- 3 Independent Programmable Timers
- Watch Dog Timer for S/W Trap
17. Miscellaneous
- Mux controlled 24 GPI, 28 GPO & 5 GPIO ports .
- Mutual exclusive GPO/GPIO ports control by the port control enable register
- Programmable Bus Master Priority.
- Project code added.
System Overview
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Service Manual
3-13
3.2.3.2 Jupiter4E Internal Block Diagram
TMS
TCK
TDI
TDO
nTRST
ARM CORE
(
ARM 940T
I/C 4KB
D/C 4 KB
)
PPI
PDE,
BUSY,
nACK,
SELECT,
PERROR,
nFAULT
PPD[7:0]
APB
BRI DGE
AHBC
( ARB,DEC,MUX)
FLASH CO RE
( mf l130_ 128Kx32 )
SCL
SDA
PROGRAM
SDRAMC
( EXT : 2 CH)
nSRAS
nSCAS
nSCS
DQM1-0
BA1-0
SCKE
ADDR18-0
DATA15-0
nOE
ADDR /DATA
BUS MUX
IOC (3CH)
/ROMC(1CH)
nIOCS1-0
INTC
TCU
MISC
PLL
( pll 2096x, pll 2073x )
CLOCK & RESET
EXTCLK
nRESET
OM2-0
CAP2-0
MOTORC
MOTPAT5-0
LSUC
( dac1264x_ 1455)
nLREADY
nHSYNC
VDO
ADC INTERFACE
( adc1275x_ pc)
ADCIN3-0
PWM
PWM3-0
LSUCLK
SCLK
A
H
B
A
P
B
A
H
B
UART
RXD1-0
TXD1-0
SHPERIOD
nLDON
DACOUT
TEST
XI
XO
USB CORE
(
USB 1 . 1
)
D+
D-
Dpullup
VBUS
nSTROBE,
nINIT,
nSLCTIN,
nAUTOFD
nROMCS
nSWE/nWE
TIC
ENEXHV
EXHV
DC2-0
PVC
nIOCS2_WE
nIOCS2_OE
nIOCS_ALL
BLDC_CLK
GPO27-0
GPIO4-0
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3-14
3.2.3.3 Asic(SPGPv3)
CPU Core : ARM1020E
- 32KB instruction cache and 32KB data cache
Operating Frequency
- CPU Core : over 300MHz
- System Bus : 100MHz
SDRAMC
- 32Bits Only, 100MHz
- 5 Banks (Up to 128MB per Bank)
ROMC
- 4 Banks (Up to 16MB per Bank)
IOC
- 6 Banks (Up to 16MB per Bank
DMAC
- 4 Channels
HPVC
- Dual/Single Beam
- LVDS Pad(VDO, HSYNC)
UART
- 5 Channels (1 Channels Supports DMA Operation)
PCI Controller
- 32Bits, 33/66MHz
- PCI Local Bus Specification rev2.2 Complaint
- Host / Agent Mode (Support 4 Devices in Host Mode)
NAND Flash Controller
- 8/16Bits, H/W EEC Generation
- Auto Boot Mode (Using Internal SRAM, 4KB)
MAC
- 10M/100Mbps
- Full IEEE 802.3 Compatibility
Engine Controller
- LSU Interface Unit
- Step Motor : 2 Channels
- PWM : 8 Channels
- ADC : 6 Channels
I2C Controller
- I2C(S-BUS) Slave Device Support(I2C Version 2.1)
RTC
- RTC Core Voltage : 3V
PLL
- 3 PLL : MAIN, PCI, PVC
3.2.3.4 Memory
Flash Memory : It stores System Program and downloads the System Program through PC Interface, and in case of
model for export it compresses the PCL font, then stores it.
- Capacity : 8M Byte (Nor Flash)
- Random Access Time : 10 us (Max)
- Serial Page Access Time : 50ns (Min)
DRAM : It is used as Swath Buffer, System Working Memory Area, etc. when printing.
It stores Font List, compressed into Flash memory, on DRAM and uses it as PCL font in case of model for export.
- Capacity : 32M Byte(STD/MAX)
- Type : SDRAM 100MHz/133MHz, 16bit
System Overview
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3.2.3.5 SPGPv3 Internal Block Diagram
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3-16
3.2.3.6 Flash Memory
It stores the system program and downloads system program through the PC Interface.
Capacity : 8M Byte (NOR Flash)
Random Access Time : 10 us (Max)
Serial Page Access Time : 50ns (Min)
3.2.3.7 SDRAM
It is used as swath buffer, system working memory area, etc. while Printing.
Capacity : The 32M Byte is for this model (32M :Printing System Working Memory Area )
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