Samsung ML-1610, ML-1615 Service Manual. Parts List

LASER PRINTER

ML-1600 Series

ML-1615/XEV

LASER PRINTER

ML-1610

LASER PRINTER

ML-1610

LASER PRINTER

ML-1610

LASER PRINTER

ML-1610

The keynote of Product

- Speed : 17ppm (Ltr) / 16ppm(A4), 600dpi

- Paper Path : MPF Type Cassette

- Emulation : SPL (ML-1610 / ML-1615P)

- Processor : 150MHz Jupiter4e CPU

- Memory : ML-1610(SDRAM,2MB),
ML-1615P(SDRAM,8MB)

- MP Cassette : 150 pages / Face Down
(50 pages)

- Fuser Design : Lamp Type

- I/O : ML-1610(USB1.1), ML-1615P
(USB1.1+IEEE 1284)

- Machine Life : 50K(pages)

Basic Model :ML-1610

Manual

SERVICE

Samsung Electronics Co.,Ltd. May. 2005
Printed in Korea.
VERSION NO. : 1.00 CODE : JC-0137C

* This service manual is a property of Samsung Electronics Co., Ltd.

Any unauthorized use of Manual can be punished under applicable
international and/or domestic law.

* This service manual is also provided on the web, the ITSELF

system Samsung Electronics Co., Ltd.

http://itself.sec.samsung.co.kr

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

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 3-19

3.4 Initial Product Installation 3-24

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 LED Status Error Messages 4-4

4.5 Periodic Defective Image 4-5

4.6 How to use DCU 4-6

4.7 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 System Block Diagram 8-1

8.2 System Timing Chart 8-2

9. Connection Diagram

9.1 Connection Diagram 9-1

10. Schematic Diagram

10.1 Main Board 10-1

10.2 Connector Circuit Diagram 10-5

10.3 SMPS Circuit Diagram 10-6

10.4 HVPS Circuit Diagram 10-7

Continued

1 1. Reference Information

1 1.1 T roubleshooting Tools 1 1-1
1 1.2 Acronyms and Abbreviations 1 1-2
1 1.3 Selecting printer locations 1 1-4
1 1.4 Sample Tests Patterns 1 1-5

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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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-1610
Series Model ML-1615P
Market of Sailes Persnal user Laser printer.(Low Price for small work Group.)
Specification

16ppm(Ltr. 17ppm), Jupiter 4e 150MHz, 2Mbytes SDRAM
1K(initial), 2K(sailes)
USB 1.1 Model(Compatible with USB 2.0), IEEE 1284 Parallel(ML-1615P)
150pages feeding, 50pages 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 16 PPM : A4 size

17 PPM (Letter size)
Resolution True 600 X 600 DPI
Source of Light Laser diode (LSU : Laser Scanning Unit)
Warm-Up Time Cold Warm-up : 30sec, Sleep mode : 30 sec
First Print Time Less than 10 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) 358*299*217 mm
Weight Net : 4.8Kg(30.6Ib) with toner cartridge

Gross : 7.65Kg(37.7Ib)
Acoustic Noise Stand by : Less than 35 dB

Printing : Less than 50 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 2,000 sheets@ISO 19752 Standard coverage

Cassette - Paper capacity : 150sheets

- Paper weight : 60 ~ 163 g/

/ 16 ~ 43 lbs

2.2.2 Controller

Item Descriptions

Processor(CPU) Jupiter 4e 150MHz
Memory Standard/Max. : 2MB(Max. 2 MB)

Type : SDRAM
Expand Memory Slot, Type : NO
Compression Technology : MET(Memory Enhancement Technology)

(Emulation) Standard : SPL

Auto Emulation Sensing : YES

(Interface) Standard : USB 1.1 Only(Compatible with USB 2.0)

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 2 Seconds
Cleaning Mode : Not Support
Service Mode : Press the Demo Key when Power on(F/W Download)

ML-1615P model : I/O Support(USB 1.1 + 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 : 300W Avg(Max. 500W)

Idling : 100W Avg or less
Power Save : 10W Avg or less

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 : 2,000 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")
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(1 sheet)
Monarch Env. 98 X191(3.87 X 7.5") O(1 sheet)
DL Env. 110 X 220(4.33 X 8.66") O(1 sheet)
C5 Env. 162 X 229(6.38 X 9.01") O(1 sheet)
C6 Env. 114 X 162(4.49 X 6.38") O(1 sheet)
Transparency(OHP) A4 or Letter O(1 sheet)
Label paper A4 or Letter O(1 sheet)

Item Descriptions

Cassette 150 sheets

Product Specifications

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Service Manual

2-5

2.3 Model Comparison Table

Model Name ML-1610 ML-1615P ML-1750

General

Company Samsung Samsung Samsung
Printing Process

Print Method: Electrophotographic Laser Electrophotographic Laser Electrophotographic laser
Print Speed Up to 16ppm in A4, Up to 17ppm in letter Up to 16ppm in A4, Up to 17ppm in letter Up to 16ppm(A4) (ML-1510 : 14ppm)
FPOT 10sec 10sec 12sec
Resolusion 600*600 600*600 600*600
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 150MHz Samsung 150MHz 66MHz RISC(Jupiter3)
Memory 2MB(2MB) 8MB SDRAM(8MB) 8MB SDRAM(2MB)
OS Win9X/ME/2000/XP/Linux7/Mac OS8.6

Win9X/ME/2000/XP/Linux7/Mac OS8.6

Win9X/ME/2000/XP/Linux7/Mac OS8.6

Standard Emulations SPL SPL GDI(SPL)

Interface Support

Standard Interfaces USB 1.1(Compatible with USB 2.0) USB 1.1 USB 1.1

Cable Not Supply(KOR,CHINA is Supply)

IEEE 1284 Parallel

Cable Not Supply

Optional Interfaces N/A N/A N/A

Paper Handling

Standard Paper Input 150 Sheets Multi-purpose Tray 150 Sheets Multi-purpose Tray 250 Sheets Multi-Purpose Cassette,

Single Sheets Adjustable Manual Feed
Paper Output Face down : 50 Sheet(TBD) Face down : 50 Sheet(TBD) 50 Sheet Face Down Tray
Duplexing 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

358mm x 299mm x 217mm 358mm x 299mm x 217mm 352mm x 372mm x 196mm

tray extended(WxDxH)
Weight(without shipping)

5.75kg 5.5kg 7.05kg(manual book : 7kg)

Carton Dimensions

455mm x 415mm x 325mm 455mm x 415mm x 325mm 508mm x 425mm x 265mm

(WxDxH)
Weight(as shipped) 7.65kg 7.65kg 9kg

Electical

Power Requirements
Power Consumption Power Consumption Power Consumption Power Consumption

300W printing, 10W Down Sleep Mode 300W printing, 10W Down Sleep Mode 330W printing, 10W 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 : <50dB(A), Standby :<35 dB(A) Operating : <50dB(A), Standby :<35 dB(A) Operating : <52dB(A), Standby :<35 dB(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 2,000 pages(A4/Letter) at ISO 5% coverage up to 2,000 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

AN3977

, THV(-)

*. These model are as yet undeveloped.

System Overview

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Service Manual

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3

3

3. System Overview

3.1 System Outline

Paper Path Layout

BIN PATH

❶ SMPS ❷ Fuser
❸ Toner Cartridge ❹ LSU
❺ Exit Roller ❻ OPC
❼ Pick-Up Roller ❽ KNOCK-UP PLATE
❾ KNOCK-UP PLA TE DOWN ❿ ASS’Y HOLDER P AD
󱆌 Feed Sensor 󱆍 MAIN PBA
󱆎 SMPS 󱆏 HVPS

󱆏

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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 150 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 : 600 Watt + /- 30 W
. Life : 3000 Hr

2) Thermostat
. Thermostat Type : Non-Contact type THERMOSTAT
. Control Temperature : 150 5

3) Thermistor
. Thermistor Type : HF-R0060 (SEMITEC 364FL Type)
. Temperature Resistance : 7 (180 )
. SYSTEM Temperature SETTING

- Stand by : 165 + /- 5

- Printing : 175 + /- 5 (5 minutes before)
170 + /- 5 (5 minutes after)

- 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 SUS Plate 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

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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

Cleaning Roller

Cleaning Blade

-720V

-350V

-550V

0.20mW

Max -1.4KV

-100V

1

2

3 4

5

6

7

8

+5KV

-150V↓

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: 2,000 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-1610 is roughly made up Main Control part and SMPS/HVPS part.
Main Controller uses Jupiter4E for its ASIC, which is on chip micro controller and developed for Low-end Laser
Beam Printer.
Jupter4E 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 interface and built-in Flash memory with 4Mbits
capacity.

3.2.1.1. Main Control

ML-1610 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 and build-in
Memory.

3.2.1.2 CPU

Use 32Bit RISC Processor of Jupiter4e, and control system by operating Operation Block of the System
Program inside Flash Memory.

SMPS

HVPS

Jupiter IV ASIC V1.1 USB

Printer
Engine

B’D

DRAM 2M Byte

Flash Memory

0.5M Byte

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, Efficient and Powerful 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

- 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 : 0.5M Byte

- Access Time : 70 nsec

3.2.1.4 DRAM

When Printing, use Band Buffer, System Working Memory Area .

- 2M capa : 2M Byte basic.
2M :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 :16ppm
(In continuing printing base A4, printing pages from 2nd to last during 1min)

3) Recording Density : 600 dpi

4) Cassette Capa. : Cassette ; 150sheets(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 : 2,000pages Printing(A4, 5% Pattern Printing)

8) First Print Out Time : within 11sec( Standby )

9) Warming up time : within 30sec (Ambient : 25° )

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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.

U1

U3

12.0MHz

U8

U9

U12

U10

U7

U5

(IC-DRAM/

512K x 16Bit)

(IC-POSI, ADSUST REG)

(IC-CMOS LOGIC, INVER TER)

(IC-MOTOR DRIVER)

(IC-VOLTAGE COMP)

(IC-CLOCK GENERATOR)

(IC-EEPROM/256x12Bit)

(IC-POSI, FLXED REG)

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U6(Jupiter 4E)

- It is a main CPU and an Asic of Jupiter4E which has a CPU core CLK with over 150MHz and a System bus 45MHz.

- It use 3.3V for operation voltage and I/O, It uses 80MHz for system bus CLK, Built in Flash Memory.

SDRAM

- Main memory. SDCLK is 80Mhz.

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 1.3V.

EEPROM(U8 : 93C66)

- 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 a the printer.

System Overview

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3-11

3.2.3 Asic(SPGPm) 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

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8. Interrupt Controller (INTC)

- FIQ or IRQ mode operation selectable

- Programmable Interrupt Enable/Disable

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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3-13

3.2.3.2 Jupiter4E Internal Block Diagram

TMS

TCK

TDI

TDO

nTRST

ARM CORE

(

ARM940T

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 CORE

( m fl 130_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 2073 x)

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

3.2.4 Sensor Controller

3.2.4.1 Paper Feeding/Width

When a paper passes an actuator of a feed sensor unit after feeding a paper into a set,it detects a signal of
the photo interrupter and informs the paper feeding status to CPU. After sensing the signal and certain time
later, it strews an image data.(Related in Paper Front Edge Adjustment)
If it could not detect the feed sensor within 1 second after feeding a paper, a paper jam0 (CPU#_) occurs.
ML-1610 differs from other general printers because it doesn’t have a paper empty sensor. It recognizes
the paper existing status by using a firmware. If a paper is not fed, it recognizes the state as no paper (Red
and Yellow lights turn on among other LEDs). With the same principle, it senses the OPC unit. After OPC
unit is mounted,the actuator operates. When it passes the actuator of sensor unit, it detects the signal of
the photo interrupter, informs the existing OPC unit to CPU, and then stays at the status.

3.2.4.2 Paper Empty Sensing

The paper empty is detected by the empty sensor mounted to an engine board and the actuator mounted
to a frame. Paper senses the on/off time of the empty sensor by using CPU and informs the normal
operation status and the jam occurrence status to CPU.

3.2.4.3 Jam Cover/Cover Open Sensing

ML-1610 uses two M/S:one senses the cover open and the other senses the jam cover open.
The cover open sensor is located on the left bottom of HVPS.When the front cover is open, +24V supplied
to each unit (DC fan,Solenoid,Main Motor,Polygon Motor Unit of LSU in Fusing Unit,and HVPS)is
interrupted.
The jam cover open sensor is located on the left bottom of SMPS. When the jam cover is open, +24V
supplied to each unit (DC fan, Solenoid, Main Motor, Polygon Motor Unit of LSU in Fusing Unit, and HVPS)
is interrupted.
D0 bit of CPU detects the jam cover open/cover open, and D7 bit of CPU detects the existence of OPC.
In this case, it informs the status to user by turning on the red LED among OP panel LEDs.

3.2.4.4 Solenoid Driving Circuit

The solenoid consists of two used for paper pick-up and MP signal. D4 bit of CPU turns it on/off, and its
driving time is 300ms. The diode protects the drive TR from the pulse (noise)generated by de-energizing
operation of solenoid.

System Overview

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3-15

3.2.5 SMPS board (Switching Module Power Supply)

The SMPS supplies DC Power to the System.
It takes 110V/220V and outputs the +5V, +24V to supply the power to the main board and other board. It is
consisted of the AMPS part, which supplies the DC power for driving the system, and the AC heater control part,
which supplies the power to fuser. SMPS has two output channels. Which are 5V and +24V

Pin No Pin Name

1 +24VS2
2 +24V
3 +24VS1
4 +24VS1
5 +5V
6 DGND
7 DGND
8 P_REGI
9 FUSER ON

<CON2>

Pin Signal

CON1(Inlet)

Micro Switch

CON2
(Output)

Exit Sensor

F1(Fuse/250V, 5A)

Power Switch