Precautions

11. Precautions

In order to prevent accidents and to prevent damage to the equipment please read the precautions listed below carefully before servicing the printer and follow them closely .

1.1 Safety Warning

(1)Only to be serviced by appropriately qualified service engineers.

High voltages and lasers inside this product are dangerous. This printer should only be serviced by a suitably trained and qualified service engineer.

(2)Use only Dell replacement parts

There are no user serviceable parts inside the printer . Do not make any unauthorized changes or

additions to the printer, these could cause the printer to malfunction and create electric shock or fire haz-ards.

(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, it is certified as a Class I laser product

con-forming 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 pre-cautions 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 STRAHL AUSSETZEN.

ATTENTION - RAYONNEMENT LASER INVISIBLE EN CAS

D OUVERTURE. EXPOSITION DANGEREUSE

AU FAISCEAU.

ATTENZIONE - RADIAZIONE LASER INVISIBILE IN CASO DI

APERTURA. EVITARE L ESPOSIZIONE AL

FASCIO.

PRECAUCION - RADIACION LASER IVISIBLE CUANDO SE ABRE.

EVITAR EXPONERSE AL RAYO.

ADVARSEL. - USYNLIG LASERSTR LNING VED BNING, N R

SIKKERHEDSBRYDERE ER UDE AF 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 DENNA DEL

R PPNAD OCH SP RREN R URKOPPLAD.

BETRAKTA EJ STR LEN. STR LEN R FARLIG.

VARO! - AVATTAESSA JA SUOJALUKITUS OHITETTAESSA

OLET ALTTIINA N KYM TT M LLE LASER-

S TEILYLLE L KATSO S TEESEEN.

Precautions

1.2 Caution for safety

1.2.1 Toxic material

This product contains toxic materials that could cause illness if ingested.

(1)If the LCD control panel is damaged it is possible for the liquid inside to leak. This liquid is toxic. Contact with the sk in should be avoided, wash any splashes from eyes or skin immediately and contact your doctor . If the liquid gets into the mouth or is swallowed see a doctor immediately.

(2)Please keep toner cartridges away from children. The toner powder contained in the toner cartridge may be harmful and if swallowed you should contact a doctor.

1.2.2 Electric Shock and Fire Safety Precautions

Failure to follow the following instructions could cause electric shock or potentially cause a fire.

(1)Use only the correct voltage, failure to do so could damage the printer and potentially cause a fire or electric shock.

(2)Use only the power cable supplied with the printer . Use of an incorrectly specified cable could cause the cable to overheat and potentially cause a fire.

(3)Do not overload the power socket, this could lead to overheating of the cables inside the wall and could lead to a fire.

(4)Do not allow water or other liquids to spill into the printer , this can cause electric shock. Do not allow paper clips, pins or other foreign objects to fall into the printer these could cause a short circuit leading to an electric shock or fire hazard..

(5)Never touch the plugs on either end of the power cable with wet hands, this can cause electric shock. When servicing the printer remove the power plug from the wall socket.

(6)Use caution when inserting or removing the power connector . The power connector must be inserted com - pletely otherwise a poor contact could cause overheating possibly leading to a fire. When removing the power connector grip it firmly and pull.

(7)Take care of the power cable. Do not allow it to become twisted, bent sharply round corners or other wise damaged. Do not place objects on top of the power cable. If the power cable is damaged it could overheat and cause a fire or exposed cables could cause an electric shock. Replace a damaged power cable immediately , do not reuse or repair the damaged cable. Some chemicals can attack the coating on the power cable, weakening the cover or exposing cables causing fire and shock risks.

(8)Ensure that the power sockets and plugs are not cracked or broken in any way . Any such defects should be repaired immediately. Take care not to cut or damage the power cable or plugs when moving the machine.

(9)Use caution during thunder or lightening storms. Dell recommends that this machine be disconnected from the power source when such weather conditions are expected. Do not touch the machine or the power cord if it is still connected to the wall socket in these weather conditions.

(10)Avoid damp or dusty areas, install the printer in a clean well ventilated location. Do not position the machine near a humidifier. Damp and dust build up inside the machine can lead to overheating and cause a fire.

(11)Do not position the printer in direct sunlight. This will cause the temperature inside the printer to rise possibly leading to the printer failing to work properly and in extreme conditions could lead to a fire.

(12)Do not insert any metal objects into the machine through the ventilator fan or other part of the casing, it could make contact with a high voltage conductor inside the machine and cause an electric shock.

1-2 Service Manual

Precautions

1.2.3 Handling Precautions

The following instructions are for your own personal safety, to avoid injury and so as not to damage the printer

(1)Ensure the printer is installed on a level surface, capable of supporting its weight. Failure to do so could cause the printer to tip or fall.

(2)The printer contains many rollers, gears and fans. Take great care to ensure that you do not catch your fingers, hair or clothing in any of these rotating devices.

(3)Do not place any small metal objects, containers of water , chemicals or other liquids close to the printer which if spilled could get into the machine and cause damage or a shock or fire hazard.

(4)Do not install the machine in areas with high dust or moisture levels, beside on open window or close to a humidifier or heater. Damage could be caused to the printer in such areas.

(5)Do not place candles, burning cigarettes, etc on the printer , These could cause a fire.

1.2.4 Assembly / Disassembly Precautions

Replace parts carefully, always use Dell parts. Take care to note the exact location of parts and also

cable routing before dismantling any part of the machine. Ensure all parts and cables are replaced correctly . Please carry out the following procedures before dismantling the printer or replacing any parts.

(1)Check the contents of the machine memory and make a note of any user settings. These will be erased if the mainboard or network card is replaced.

(2)Ensure that power is disconnected before servicing or replacing any electrical parts.

(3)Disconnect printer interface cables and power cables.

(4)Only use approved spare parts. Ensure that part number , product name, any voltage, current or temperature rating are correct.

(5)When removing or re-fitting any parts do not use excessive force, especially when fitting screws into plastic.

(6)Take care not to drop any small parts into the machine.

(7)Handling of the OPC Drum

-The OPC Drum can be irreparably damaged if it exposed to light.

Take care not to expose the OPC Drum either to direct sunlight or to fluorescent or incandescent room lighting. Exposure for as little as 5 mins can damage the surface??? s photoconductive properties and will result in print quality degradation. Take extra care when servicing the printer. Remove the OPC Drum and store it in a black bag or other lightproof container. Take care when working with the covers(especially the top cover) open as light is admitted to the OPC area and can damage the OPC Drum.

-Take care not to scratch the green surface of OPC Drum Unit.

If the green surface of the Drum Cartridge is scratched or touched the print quality will be compromised.

Precautions

1.2.5 Disregarding this warning may cause bodily injury

(1)Be careful with the high temperature part.

The fuser unit works at a high temperature. Use caution when working on the printer . Wait for the fuser to cool down before disassembly.

(2)Do not put finger or hair into the rotating parts.

When operating a printer, do not put hand or hair into the rotating parts (Paper feeding entrance, motor , fan, etc.). If do, you can get harm.

(3)When you move the printer.

This printer weighs 17.5kg including toner cartridge and cassette. Use safe lifting and handling techniques. Use the lifting handles located on each side of the machine. Back injury could be caused if you do not lift carefully .

(4)Ensure the printer is installed safely.

The printer weighs 17.5Kg, ensure the printer is installed on a level surface, capable of supporting its weight. Failure to do so could cause the printer to tip or fall possibly causing personal injury or damaging the printer .

(5)Do not install the printer on a sloping or unstable surface. After installation, double check that the printer is stable.

1-4 Service Manual

Precautions

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 of f any electrostatic charge on your body by touching a known earth ground. Alternatively, employ a commercially avail - able 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 assem - bly.

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 compa - rable conductive material.

7.Immediately before removing the protective shorting material from the leads of a replacement ESD, touch the pro- tective 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 com- pletely 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 suf ficient to damage an ESD.

1.4 Super Capacitor or Lithium Battery Precautions

1.Exercise caution when replacing a super capacitor or Lithium battery . There could be a danger of explosion and subsequent operator injury and/or equipment damage if incorrectly installed.

2.Be sure to replace the battery with the same or equivalent type recommended by the manufacturer.

3.Super capacitor or Lithium batteries contain toxic substances and should not be opened, crushed, or burned for disposal.

4.Dispose of used batteries according to the manufacture??? s instructions.

Reference Information

22. Reference Information

This chapter contains the tools list, list of abbreviations used in this manual, and a guide to the location space required when installing the printer. A definition of tests pages and Wireless Network information definition is also included.

2.1 Tool for Troubleshooting

The following tools are recommended safe and easy troubleshooting as described in this service manual.

Reference Information

2.2 Acronyms and Abbreviations

The table in the below explains abbreviations used in this service manual.

The contents of this service manual are declared with abbreviations in many parts. Please refer to the table.

2-2 Service Manual

Reference Information

2.3 The Sample Pattern for the Test

The sample pattern shown in below is the standard pattern used in the factory .

The life of the toner cartridge and the printing speed are measured using the pattern shown below . (The image is 70% of the actual A4 size).

2.3.1 A4 ISO 19752 Standard Pattern

This test page is reproduced at 70% of the normal A4 size

Product Specifications

33. Product Specifications

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

3.1 Product Overview

Concept: MFP of high speed

Target User : Small & Medium Business

Customer Benefits (Sales Points)

-Fast Printing Speed

(25ppm in A4 / 27ppm in Letter)

-Multifunction Network Solution (Scan-to-Email, Scan-to-SMB, Scan-to-FTP)

-Duplex Capability

-Direct USB Connectivity 2nd Version (PDF Direct Printing)

-Small Foot Print

Key Features

-25 ppm Print speed/14 cpm Copy Speed

-1200 dpi Print Resolution (Addressable)

-PCL6, PS3(SCX-5530FN)

-64MB System Memory/32MB DIMM(5530FN)

-50 ADF

-250 sh Paper Input / 150 sh Paper Output

-33.6 Kbps Fax Modem (5530FN only)

-Duplex Print (5530FN only)

Product Specifications

3.2 Product General Specifications

3-2 Service Manual

Product Specifications

Product Specifications

3-4 Service Manual

Product Specifications

Product Specifications

3-6 Service Manual

Product Specifications

Product Specifications

3-8 Service Manual

System Outline

44. System Outline

This document is the product specification for Dell 1815dn. Dell 1815dn is a Multi-Function Peripheral (MFP) integrating a plain fax, a B/W laser printer, a color flatbed scanner, and a B/W copier. Dell 1815dn is devel- oped for small workgroup and personal of fice customers. The main product concept is ?? ??? High Speed and High Quality.???? This model has 27ppm print-speed, 3 sec transmission-speed for fax, 33.6kbps fax-transfer rate, optical 600 dpi color scanner, and 1200 dpi printer.

Dell 1815dn is developed to meet standard approvals of FCC Part 15 Class B, FCC Part 68, IC 60950, and cUL for the US and Canada. Other markets covered are Europe, Latin America and Emerging Markets. Agency Certifications will be attained to enable launch in all target markets

4.1 System Configurations

Dell 1815dn is made up of the Main Control part, Operation Panel part, Scanner part, Line interface part and Power part. Each Part is a separate Module which focuses on common and standard design of

different kind of products. Main control part adopting Fax & LBP Printer exclusive Controller is composed of 1 CPU and 1 Board. Scanner part is composed of ADF and Platen and is connected with Main by Harness. Line Interface part is designed to apply TBR21 standard (Domestic, Europe, etc.)

4.1.1 CPU Part

1) CPU : ARM920T , which is exclusive controller to execute Printer & F AX Function and to execute opera- tion block by flash memory within system program, and to control whole system.

Main function block

Completely Integrated System for Embedded Applications

PVC

- Dual / Single Beam, - LVDS Pad (VDO, HSYNC), - Support A3 1200dpi, multi-pass color.

HPVC

- Dual / Single Beam, - LVDS Pad (VDO, HSYNC), - Support A4 600dpi, multi-pass color.

DMA

-6 Channels (if not use CIP4e, 4ch is available for external DMA.

if CIP4E used (a4 DMA channel use), 2ch available for external DMA)

Operation Frequency : CPU Core -> over 300MHz, System Bus -> 100MHz

Operation Voltage : Core Voltage -> 1.2V, I/O Pad Voltage -> 3.3V, RTC Voltage -> 3V

2) Flash Memory : Record System Program, and download System Program by PC INTERF ACE. FAX for Journal List, and Memory for One Touch Dial, Speed Dial List.

-size : 16M Byte (NOR Flash)

-Access Time: 90ns (Max)

-Page Access Time: 25ns (Max)

System Outline

3) SDRAM : is used as Swath Buffer in Printing, Scan Buffer in Scanning, ECM Buffer in FAX receiving, and System Working Memory Area

- size : 64Mbyte(Basic) , 96Mbyte(Duplex)

4MB : System Working Memory Area and Scan Buffer

4MB : FAX Memory Receive Area

16MB : Printing System Working Memory Area

-Max Frequency : 166MHz

-store Fax Receive Memory Data by using Battery

4.1.2 FAX Section

Modem Part

BLOCK DIAGRAM

Implemented by based on Conexant DAA (Data Access Arrangement) Solution, and is roughly composed of two kinds Chip Solution

-CX86710 (SFX336): Existing Modem Chip which adds SSD (System Side Device) for interfacing between LSD and DIB of FM336Plus Core

-CX20493 (LSD) : LIU (Line Interface Unit) Chip which is controlled by SSD and satisfies each PSTN Requirements by modulating internal Configuration with connecting Tel Line.

4-2 Service Manual

System Outline

Modem (SFX336) specification.

2-wire half-duplex fax modem modes with send and receive data rates up to 33,600 bps

V.17, V.34, V.29, V.27 ter, and V.21 Channel 2

Short train option in V.17 and V.27 ter

PSTN session starting

V.8 and V.8bis signaling

HDLC support at all speeds

Flag generation, 0-bit stuffing, ITU CRC-16 or CRC-32 calculation and generation

Flag detection, 0-bit deletion, ITU CRC-16 or CRC-32 check sum error detection

FSK flag pattern detection during high-speed receiving

Tone modes and features

Programmable single or dual tone generation

DTMF receiver

Tone detection with three programmable tone detectors

Receive dynamic range:

0 dBm to 43 dBm for V.17, V.29, V.27 ter and V.21 Channel 2

9dBm to -43 dBm for V.34 half-duplex

Digital speaker output to monitor received signal

Two16-byte FIFO data buffers for burst data transfer with extension up to 255 bytes

V.21 Channel 1Flag detect

V.21 Channel 1Flag detect

+3.3V only operation

Typical power consumption Normal mode: 264 mW

System Outline

Signal Transition of DAA Solution

Line Interface Signal of Tel Line and LSD is Analog Signal.

2)there is A/D, D/A Converter in LSD, so Analog Signal from Tel Line is converted in Digital through A/D Converter in DAA and transfer to SSD by DIB Capacitor

Digital Signal from SSD is converted to Analog by D/A Converter in DAA and transfer to Tel Line

Transformer transfer Clock from SSD to LSD and Clock Frequency is 4.032MHz.

LSD full wave rectifies Clock to use as inner Power supply and also use as Main Clock for DIB Protocol Sync between LSD and SSD. Transformer transfer Clock by separating Primary and Secondary, and amplifies Clock Level to LSD by Coil Turns Ratio 1:1.16.

Clock

-Clock is supplied by transformer from SSD to LSD, and there is PWROUT to adjust output impedance of Clock

Out Driver is inside SSD and CLKSHIGH Resistor to adjust duty of HLPWR Resistor and Clock. Clock from SSD to LSD has Dif ferential structure of 180 phase difference for Noise Robustness

DIB Data transfer Data from SSD to LSD by Transformer, and also transfer specific data from LSD to SSD.

After transferring data from SSD, RSP is transferred and LSD recognizes RSP and change LSD to output Driver transfer Data to SSD.

DIB Data form SSD to LSD by Transformer has Differential structure of 180 phase difference between DIBP and DIBN for Noise Robustness

4-4 Service Manual

System Outline

4.1.3 Line Interface Part

This is Connection Part between system and PSTN(Public Switched Telephone Network), and primary circuit is usually located. Main functions are Line Interface, Telephone Connection and Line Condition Monitoring.

1 Telephone Line Connection

Modular Plug : RJ-11C

LIU PBA Modular Type : 623 PCB4-4

Line Code Length : 2500 50mm

Line Code Color : Black

ON HOOK state Characteristic 1) DC Resistance

DP Dial Mode (Direct Current 30mA) : 50 ~ 300ohm DTMF Dial Mode (Direct Current 20mA) : 50 ~ 540ohm

2) Ring Sensitivity

Ring detection Voltage : 40Vrms 150Vrms (condition :Current=25mA,Frequency=15Hz) product Margin : 30Vrms 150Vrms

Ring detection Frequency : 15.3Hz 68Hz (condition : Voltage=45Vrms,Current=25mA ) product Margin : 15Hz 70Hz

Ring detection Current : 20mA 100mA (condition : Voltage=40Vrms,Frequency=20Hz) product Margin : over 15mA

3) False Ring Sound

Ring Frequency : 750 Hz + 1020 Hz

Ring interrupt Cycle : On/Off depending on input Ring Signal Cycle.

System Outline

4.1.4 Scan Part

Pictorial signal input part: output signal of CCD passes through Bypass Cap change to ADC at HT82V26, and defined signal between HT82V26 and CHORUSm processes the Image signal. When AFE accept each pixel, CDS(Correlated Double Sampling ) technique which samples arm-level twice is used on each pixel by using CIP4e signal.

2) Pictorial image processing part: read CCD Pixel data in terms of 600dpi Line and process Error Diffusion Algorithm on Text mode and Photo mode, and then store Data at Scan Buf fer on PC Scan mode without algo - rithm.

On every mode Shading Correction and Gamma Correction are executed ahead, then processing is executed later.

* Scan Image Control Specification

Minimum Scan Line Time: 0.75ms

main function

-Internal 12bit ADC

-White Shading Correction

-Gamma Correction

-CCD Interface

-256 Gray Scale

3)CCD Operating Part : CCD Image sensor use +5V and Inverter uses +24V

- CCD Maximum Operating Frequency : 10MHz

- White Data output Voltage : 0.7V 0.5V (Mono Copy, 0.75ms/line)

- Maximum Inverter Current : 600 mA Max.( +24V)

4.1.5 OPE Pannel Section

(1) Configuration

Operations Panel uses Main Control and separated OPE Chip Micom and work as inner program,

systemic operation is serial system which exchange Date with SIO Port of Main Control. OPE Panel is approxi - mately composed of Micom part, Matrix part and LCD.

(2) Micom controller

Micom has ROM, RAM, I/O Port built-in and displays and lights LCD by CPU command of Main Control Part and report Key recognition Data to Main Control Board.

4-6 Service Manual

System Outline

4.1.6 Printer Section

Printer is consisted of the Engine parts and F/W , and engine parts is consisted of the mechanical parts comprising Frame, Feeding, Developing, Driving, Transferring, Fusing, Cabinet and H/W comprising the main control board, power board, operation panel, PC Interface.

The main controller is consisted of ASIC (CHORUSm) parts, Memory parts, Engine Interface parts and it functions as Bus Control, I/O Handling, drivers & PC Interface by CPU.

The Engine Board and the Controller Board are in one united board, and it is consisted of CPU part and print part in functional aspect. The CPU is functioned as the bus control, I/O handling, drivers, and PC interface. The main board sends the Current Image, Video data to the LSU and manages the conduct of Electro photography for print - ing. It is consisted of the circuits of the motor (paper feed, pass) driving, clutch driving, pre-transfer lamp driving, current driving, and fan driving.

The signals from the paper feed jam sensor and paper empty sensor are directly inputted to the main board.

Service Manual 4-7

System Outline

ASIC

4-8 Service Manual

System Outline

System Outline

4-10 Service Manual

System Outline

4.1.7 Copier Section

Service Manual 4-11

System Outline

4.1.8 Telephone Section

4.1.9 SMPS & HVPS SECTION

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 ADF board. The HVPS board creates the high voltage of THV/MHV/Supply/Dev and supplies it to the developer part for making best condition to dis - play the image. The HVPS part takes the 24V and outputs the high voltage for THV/MHV/BIAS, and the outputted high voltage is supplied to the toner, OPC cartridge, and transfer roller.

HVPS (High Voltage Power Supply)

Transfer High Voltage (THV+)

Input Voltage: 24 V DC 15%

Output Voltage: MAX +5.0KV Duty Variable,) -1.2KV 15% ()

Output Voltage Trigger: 6.5

Line Regulation : under3% (fluctuation input 21.6V ~ 27.6V)

Output Voltage Rising Time 50ms Max

Output Voltage Falling Time : 100 ms Max

Fluctuating transfer voltage with environmental various : +650 V(Duty 10%) ~ 5 KV (Duty 90%)

Environment Recognition Control Method : The THV-PWM ACTIVE is transfer active signal. It detects the resistance by recognizing the voltage value, F/B, while permits the environmental recognition voltage.

Output Voltage Control Method : Transfer Output Voltage is outputted and controlled by changing Duty of THVPWM

Signal. 10% Duty : +650V, 90% Duty : +5KV

4-12 Service Manual

System Outline

Charge Voltage (MHV)

Input Voltage : 24 V DC 15%

Output Voltage : -1.2KV ~ -1.8KV DC 3%

Output Voltage Rising Time : 50 ms Max

Output Voltage Falling Time : 50 ms Max

Output Control Signal(MHV-PWM) : CPU is HV output when PWM is Low

Cleaning Voltage (THV-)

The (+) Transfer Voltage is not outputted because the THV PWM is controlled with high.

The (-) Transfer Voltage is outputted because the THV-Enable Signal is controlled with low The output fluctuation range is big because there is no Feedback control.

Output Voltage Rising Time : 50 ms Max

Output Voltage Falling Time : 50 ms Max

Output Control Signal (BIAS-PWM) : the CPU output is HV output when PWM is low .

Supply

Output Voltage : -300V ~ -800V DC 5% (ZENER using, DEV )

Output Voltage Rising Time : 50 ms Max

Output Voltage Falling Time : 50 ms Max

Output Control Signal (BIAS-PWM) : the CPU is HV output when PWM is low .

Service Manual 4-13

System Outline

SMPS (Switching Mode Power Supply)

It is the power source of entire system. It is assembled by an independent module, so it is possible to use for common use. It is mounted at the bottom of the set.

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 3.3V and +24V .

AC Input

Input Rated Voltage: AC 115V ~ 127V / AC 220V ~ 240V AC 120V / AC 220V(EXP version)

Input Voltage fluctuating range : AC 198V ~ 264V AC 90V ~ 135V / AC 198V ~ 264V (EXP version)

Rated Frequency : 50/60 Hz

Frequency Fluctuating range : 47 ~ 63 Hz

Input Current : Under 5.0Arms / 2.5Arms (But, the status when lamp is of f or rated voltage is inputted/ outputted )

Rated Output Power

4-14 Service Manual

System Outline

Length of Power Cord : 1830 50mm

Power Switch : Use

Feature

Insulating Resistance : 100 or more (at DC 500V)

Withstanding Voltage : Must be no problem within 1 min. (at 1000V -LV model / 1500Vac-HV model,10mA)

Leaking Current : under 3.5mA

Running Current : under 40A PEAK (AT 25 , COLD START) under 60A PEAK (In other conditions)

Rising Time : within 2Sec

Falling Time : over 20ms

Surge : Bi-Wave 3kV ? Normal, 6KV - Common

Environment Condition

Operating temperature range : 0 40

Maintaining temperature range : -25 85

Preserving Humidity Condition : 30% 90% RH

Operating atmospheric pressure range : 1atm

EMI Requirement : CISPR ,FCC, CE, MIC

Safety Requrement :IEC950 UL1950, CSA950, C-UL,NOM,TUV,Semko,EK,CB, GOST, EPA, Power save

FUSER AC POWER CONTROL

Fuser(HEAT LAMP) gets heat from AC power. The AV power controls the switch with the Triac, a semiconductor switch. TheON/OFF control is operated when the gate of the Triac is turned on/off by Phototriac (insulting part).

In other words, the AC control part is passive circuit, so it turns the heater on/of f with taking signal from engine control part.

When the HEATER ON signal is turned on at engine, the LED of PC501 (Photo Triac) takes the voltage and flashes. From the flashing light, the Triac part (light receiving part) takes the voltage, and the voltage is supplied to the gate of Triac and flows into the Triac. As a result, the AC current flows in the heat lamp, and heat is occurred.

On the other hand, when the signal is of f, the PC501 is off, the voltage is cut off at the gate of Triac, the Triac becomes off, and then the heat lamp is turned of f.

Triac (Q501) feature : 24A-LV model / 16A-HV model, 600V SWITCHING

Phototriac Coupler (PC501)

Turn On If Current : 15mA 50mA(Design: 16mA)

High Repetive Peak Off State Voltage : Min 600V

Service Manual 4-15

System Outline

4.1.10 Toner Cartridge

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, devel- oping roller, and the blade.

4.1.11 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 sig - nal 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.

4.1.12 Fixing Part (FUSER)

The fuser is consisted of the Heat Lamp, Heat Roller, Pressure Roller, Thermistor and Thermostat. It adheres the toner to the paper with pressure and a heat to complete the printing job.

4.1.13 TRANSFER Ass???y

It is consisted of PTL (pre-transfer lamp) and Transfer Roller. The PTL sends a light to the OPC drum, makes the current on the drum surface to low, and improve the transfer efficiency.

The transfer roller delivers the toner of the OPC drum to the paper .

4.1.14 Driver Ass???y

It is a power delivery unit by gearing: BLDC Motor(P62) -> Pickup/Feeder/Developer

4-16 Service Manual

System Outline

4.1.15 Feeding Part

Feeding Type: Universal Cassette Type

Feeding Standard: Center Loading

Feeding Qty: Cassette 250 sheets (75g/ , 20lb paper standard)

Bypass 50 sheet (Paper, OHP, Envelope etc.)

Separating Type: Cassette - Friction Pad Type

Bypass - Friction Pad Type

Driver Type: Driving by Gearing from Main Motor

Pick_up Roller Driver: Solenoid

4.1.16 Duty Cycle

(except where noted otherwise, all toner usage references are for Letter size paper at 5% coverage)

Product Life Time : 200,000 images or 5 years, whichever comes first

Toner CRU: Initial CRU to be 3,000 pages (In-Box): 85 grams

After-market CRU will be 5,000 pages: 140grams

Recommended Duty Cycle: 1,500 pages/month (A4 size ,ISO 19752 5% coverage)

AMPV: Printing: 2,500 pages

Flat-bed: 150 pages

ADF: 150 pages

Max. Monthly Volume: Printing: 25,000 pages

Flat-bed: 1,000 pages

ADF: 1,000 pages

Periodic replace parts are recommended as follows:

Service Manual 4-17

Precautions

55. Disassembly and Reassembly

5.1 General Precautions on Disassembly

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.

Precautions

5.2 Front Cover

5-2 Service Manual

Precautions

5.3 MP Tray Ass'y

Precautions

5.4 Rear Cover

5-4 Service Manual

Precautions

5.Unlatch the Face Up Cover from the Rear Cover and then release the Face Up Cover, as shown below.

Precautions

5.5 Fuser Ass'y

5-6 Service Manual

Precautions

Precautions

5-8 Service Manual

Precautions

5.6 Side Cover (Left, Right)

Precautions

6.To remove the DIMM Cover, first open the DIMM Cover (refer to 5.4.1) and then release the DIMM Cover, as shown below.

Notice : Be careful not to damage the hooks when remove the Side Cover (Left, Right).

5-10 Service Manual

Precautions

5.7 Scanner Ass'y

Service Manual 5-11

Precautions

Precautions

Service Manual 5-13

Precautions

Precautions

5.8 ADF Ass'y

Service Manual 5-15

Precautions

5-16 Service Manual

Precautions

5.9 OPE Unit

3. Remove the Contact Rubber from the OPE Cover.

Service Manual 5-17

Precautions

5.10 Shield Controller Ass'y

5-18 Service Manual

Precautions

Service Manual 5-19

Precautions

5.11 Drive Ass'y

Notice : The six screws have numbers stamped into the Drive Ass'y base plate. When refitting the Drive Ass'y tighten the screws the order they are numbered. Only screws numbered 1 to 5 are fitted at this stage. Screw 6 is fitted when the Shield Controller Ass'y is refitted.

5-20 Service Manual

Precautions

5.12 Duplex Drive Ass'y

Duplex Drive Ass'y

Service Manual 5-21

Precautions

5.13 Shield SMPS Ass'y

3.Remove the three screws securing the Shield SMPS Ass'y and remove it.

5-22 Service Manual

Precautions

5.14 Connection PCB

2. Unplug the all connectors.

3.Remove the two screws securing the Connection PCB and remove it.

Service Manual 5-23

Precautions

5.15 Fuser Drive Ass'y

3.Remove the three screws securing the Fuser Drive Ass'y and remove it.

5-24 Service Manual

Precautions

Service Manual 5-25

Precautions

5.17 Pick Up Roller Ass'y

5-26 Service Manual

Precautions

5.18 Duplex Guide Housing (With Feed Roller)

3.Unplug the one connector (Photo Interrupter) and remove the Duplex Guide Housing (with Feed Roller), as shown below.

Service Manual 5-27

Precautions

5.19 HVPS Housing

3.Unplug the connector for connection PBA & SMPS first. Unplug the other connectors.

Duplex Motor

5-28 Service Manual

Precautions

5.20 Middle Cover Ass'y

5.21 Cover Mid Front

Precautions

5.22 MPF Housing

5-30 Service Manual

Precautions

5.23 Feed Roller Parts

Service Manual 5-31

Precautions

5-32 Service Manual

Precautions

5.24 Pick Up Gear Ass'y & Solenoids

5.25 Exit Roller

Precautions

5.26 LSU

5.27 Terminal PBA

Notice : Be aware of the Terminals to ensure they are not lost.

5-34 Service Manual

Precautions

5.28Transfer Roller Parts

1.To remove the Transfer Roller, first push the TR Holder and then take out the Transfer Roller, as shown below.

Notice : Do not grab the rubber part of the Transfer Roller, it may cause a malfunction due to a foreigen object. Hole the both side of the Transfer Roller when replacing it.

Service Manual 5-35

Alignment & Adjustments

66. 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 Paper path

Alignment & Adjustments

6.2 Clearing Paper Jams

Occasionally, paper can be jammed during a print job. Some of the causes include:

???The tray is loaded improperly or overfilled.

???The tray has been pulled out during a print job.

???The front cover has been opened during a print job.

???Paper was used that does not meet paper specifications.

???Paper that is outside of the supported size range was used.

If a paper jam occurs, LCD window will show it??? s speeds. Find and remove the jammed paper. If you don???t see the paper, open the covers.

Do not use a pinset or a sharp metal tool when removing a jam.

The covering of a metal part can be removed which can cause an electric leakage.

6-2 Service Manual

Alignment & Adjustments

6.2.1 Clearing Document Jams

When a document jams while it passes through the ADF, Document Jam appears on the display.

NOTE: To prevent document jams, use the document glass for thick, thin or mixed documents.

b. Remove the document by gently pulling it out.

Alignment & Adjustments

6-4 Service Manual

Alignment & Adjustments

6.2.2 Clearing Jams in the Paper Paths

When a paper jam occurs, Paper Jam appears on the display . Refer to the table below to locate and clear the paper jam.

To avoid tearing the paper, pull the jammed paper out gently and slowly. Follow the steps below to clear the jam.

If you cannot see the paper or the paper does not move when pulled, check the fuser area. For more information, see "Fuser Area Jam".

4.Insert the paper tray into the printer until it snaps into place.

Printing automatically resumes.

Alignment & Adjustments

6-6 Service Manual

Alignment & Adjustments

Alignment & Adjustments

Alignment & Adjustments

Alignment & Adjustments

6.2.9 Duplex Jam 1

6-10 Service Manual

Alignment & Adjustments

6.3 User Mode(Dell Laser MFP1815dn)

The table in the bellow explains the possible setting functions by user . The details about the ways to use are explained in the user manual.

In the service manual, the items are about the possible set-up by user .

Service Manual 6-11

Alignment & Adjustments

6.4 Tech Mode

6.4.1 How to Enter Tech Mode

In service (tech) mode, the technician can check the machine and perform various test to isolate the cause of a malfunction.

While in Tech mode, the machine still performs all normal operations.

To enter the Tech mode

To enter the Tech mode, press in sequence, and the LCD briefly displays ???TECH???, the machine has entered service (tech) mode.

6.4.2 Setting-up System in Tech Mode

MFP1815dn

6-12 Service Manual

Alignment & Adjustments

FLASH UPGRADE

The Firmware Upgrade function and has two methods, Local and Remote.

(1) Local Machine

??? RCP(Remote Control Panel) mode

This method is for Parallel Port.or USB Port Connect to PC and activate RCP(Remote Control Panel) to upgrade the Firmware.

< Method >

How to Update Firmware using RCP

1.Connect PC and Printer with Parallel Cable or USB Cable.

2.Execute RCP and select Firmware Update.

3.Search Firmware file to update with Browse Icon.

4.Click Update icon, firmware file is transmitted to Printer automatically and printer is initialized when it fin - ished.

5.Click Refresh icon and check what is updated.

???DOS Command mode

This method is just for Parallel Port. Connect to PC with Parallel cable and enter DOS Command to upgrade the Firmware.

< Method >

1.The first of all, need the files : down.bat, down_com.bin, fprt.exe, and Rom File: file name for upgrade.Save the files in the same folder.

2.In the DOS, input as below and push the enter key . Then, it will be automatically upgraded.

3.There are two commands for the conditions of product. * When the product is in idle condition down "rom file"

* When the product is in Ready condition (TECH MODE ??? DATA SETUP ??? FLASH UPGRADE??? LOCAL)

fprt "rom file"

4.Do not turn off the power while upgrading process.

(2)Remote FAX

This is a function that a fax with the latest firmware sends files to a fax in long distance through telephone line.

< Method >

1. Operate a fax with the latest firmware to prepare it being upgrade.

(TECH MODE ??? DATA SETUP??? FLASH UPGRADE??? REMOTE) 2. Input the fax number, which needs to be upgraded.

(Several faxes can be upgrade at the same time. In this case, enter the each fax number .) 3. After push the enter button, send the firmware file by calling to the appointed number .

(Around 10~15 minutes needs to send the file.)

< Caution >

1.sending and receiving fax must be the same model.

2.A sending fax must be set up as ECM mode, and a receiving memory must be set up as 100%. If not, the function operates abnormally.

6-14 Service Manual

Alignment & Adjustments

6.4.4 Machine Test

SWITCH TEST

Use this feature to test all keys on the operation control panel. The result is displayed on the LCD window each time you press a key.

MODEM TEST

Use this feature to hear various transmission signals to the telephone line from the modem and to check the modem. If no transmission signal sound is heard, it means the modem part of the main board malfunctioned.

DRAM TEST

Use this feature to test the machine's DRAM. The result appears in the LCD display. If all memory is working normally, the LCD shows << O K >>

ROM TEST

Use this feature to test the machine'S ROM. The result and the software version appear in the LCD display.

???FLASH VER : 1.00 V

???ENGINE VER :1.00V

PATTERN TEST

Using this pattern printout, you can check if the printer mechanism is functioning properly . It is needed in the production progress. Service person doesn't need to use it.

SHADING TEST

The function is to get the optimum scan quality by the specific character of the CCD(Charge Coupled Device). If the copy image quality is poor , perform this function to check the condition CCD unit.

< Method >

1. Select the [ADJUST SHADING] at the

TECH MODE.

2. Push the SET UP button then an image will be scanned.

3.After the scan, CCD SHADING PRO- FILE will be print out.

4. If the printed image is dif ferent to the image, the CCD is defect.

NOTICE : When you test CCD, make sure that the cover is closed.

Service Manual 6-15

Alignment & Adjustments

6.4.5 Report

PROTOCOL LIST

This list shows the sequence of the CCITT group 3 T.30 protocol during the most recent sending or receiving operation. Use this list to check for send and receive errors. If a communication error occurs while the machine is in TECH mode, the protocol list will print automatically.

SYSTEM DATA

This list provides a list of the user system data settings and tech mode settings.

6-16 Service Manual

Alignment & Adjustments

6.5 Engine Test Mode

The Engine Tests Mode supplies useful functions to check the condition of the engine. It tests the condition of each device and displays the result of the test on the LCD. It is classified into 5 functions (0~4), and are shown below .

Outline

-In order to enter ???Engine Test ??? mode,,the method should be especial because this mode is developed for related engineers, not for users

-After Entering the mode,the message,???Engine Test Mode ??? is displayed..

-On the mode,an engineer should press the ???Menu Key=>#=>1=>9=>3=>1 ??? to search each function he would like to test..

-Turn the power off,after the test is entirely end.

6.5.1 To enter the Engine Test Mode

To enter the Engine Test mode

Press in sequence, and the LCD briefly displays ???Engine Test???, the machine has entered Engine Test Mode.

6.5.2 Diagnostic

Service Manual 6-17

Alignment & Adjustments

6.5.3 Detail Description(Engine Test Mode)

6-18 Service Manual

Alignment & Adjustments

6.6 Identify Sale Date

This function confirms the date that consumer bought product and used the product for the first time. When the consumer first operate the machine, it will start a scan and page count.

The time the machine was first used is remembered.

These settings are are remembered after memory delete (Clear All Memory).

< Method >

Press MENU, #, 1, 9, 3, # in sequence.Firmware version is displayed on LCD.

Press 1( in the number keypad) : The LCD display shows "Updated date"

Press 2( in the number keypad) : The LCD display shows "Product first use date"

Service Manual 6-19

Alignment & Adjustments

6.7 Consumables and Replacement Parts

The cycle period outlined below is a general guideline for maintenance.

The example list is for an average usage of 50 transmitted and received documents per day. Environmental conditions and actual use will may vary.

The cycle period given below is for reference only.

6-20 Service Manual

Alignment & Adjustments

6.8 Abnormal Image Printing and Defective Roller

If abnormal image prints periodically, check the parts shown below.

Service Manual 6-21

Alignment & Adjustments

6.9 Error Messages

6-22 Service Manual

Alignment & Adjustments

Service Manual 6-23

Troubleshooting

77. Troubleshooting

7.1 Paper Feeding Problems

7.1.1 Wrong Print Position

??? Description Printing begins when the paper is in the wrong position.

7.1.2 JAM 0

5.If the paper feeds into the printer rand Jam 0 occurs, cheek diagnostic mode to check feed-sensor of the engine board.

Troubleshooting

7.1.3 JAM 1

1.Recording paper is jammed in front of or inside the fuser .

???Description 2. Recording paper is stuck in the discharge roller and in the fuser just after passing through the

Actuator-Feed.

7.1.4 JAM 2

1.Recording paper is jammed in front of or inside the fuser .

???Description 2. Recording paper is stuck in the discharge roller and in the fuser just after passing through the

Actuator-Feed.

7-2 Service Manual

Troubleshooting

7.1.5 Multi-Feeding

7.1.6 Paper rolled in the fuser

??? Description If contaminated at intervals of 57mm on the back of a paper .

Troubleshooting

7.1.7 Paper rolled in the OPC

7.1.8 Defective ADF

??? Description ADF (Automatic document Feeder) is not properly operated.

7-4 Service Manual

Troubleshooting

7.2. Printing Problems (malfunction)

Troubleshooting

7.2.3 Not functioning of the fuser gear due to melting away

7.2.4 Paper Empty

7.2.5 Paper Empty without indication

7-6 Service Manual

Troubleshooting

7.2.6 Door Open

7.2.7 No Beep on when the Door is open

Troubleshooting

7.2.8 Defective Motor operation

7.2.9 No Power

7-8 Service Manual

Troubleshooting

7.2.10 Vertical Line Getting Curved

Troubleshooting

7.3 Printing Quality Problems

7.3.1 Vertical Black Line and Band

7.3.2 Vertical White Line

7-10 Service Manual

Troubleshooting

7.3.3 Horizontal Black Band

7.3.4 Black/White Spot

Service Manual 7-11

Troubleshooting

7.3.5 Light Image

7.3.6 Dark Image or a Black

7-12 Service Manual

Troubleshooting

7.3.7 Uneven Density

??? Description Print density is uneven between left and right.

3.The toner level is not even on the devel - oper roller due to the bad blade.

7.3.8 Background

Service Manual 7-13

Troubleshooting

7.3.9 Ghost (1)

??? Description Ghost occurs at 75.5 mm intervals of the OPC drum in the whole printing.

7.3.10 Ghost (2)

7-14 Service Manual

Troubleshooting

7.3.11 Ghost (3)

7.3.12 Ghost (4)

??? Description Ghost occurs at 77.8 mm intervals.

7.3.13 Stains on the front of the page

Service Manual 7-15

Troubleshooting

7.3.14 Stains on back of the page

7.3.15 Blank Page Print out (1)

7.3.16 Blank Page Print out (2)

1. Blank page is printed.

??? Description 2. One or several blank pages are printed.

3. When the printer turns on, several blank pages print.

7-16 Service Manual

Troubleshooting

7.4 Fax & Phone Problems

7.4.1 No Dial Tone

??? Description While on-hook button is pressed, there is no dial tone.

7.4.2 Defective MF DIAL

??? Description The MF DIAL is not functioning.

Notes:

Product supports the MF DIAL type only.

Service Manual 7-17

Troubleshooting

7.4.3 Defective FAX FORWARD/RECEIVE

??? Description The FAX FORWARD/RECEIVE is not functioning.

7.4.4 Defective FAX FORWARD

??? Description RECEIVE is functioning, but FORWARD is not functioning or the received data are broken.

2.Check the RECEIVE condition by trying to forward a FAX to another fax machine from the forwarding side FAX.

3.Check if the telephone line connected to the Product is contaminated or gets stripped off or down.

7-18 Service Manual

Troubleshooting

7.4.5 Defective FAX RECEIVE (1)

??? Description FORWARD is functioning, but RECEIVE is not functioning or the received data are broken.

7.4.6 Defective FAX RECEIVE (2)

7.4.7 Defective FAX RECEIVE (3)

??? Description The phone is ringing continuously, but it cannot receive.

Service Manual 7-19

Troubleshooting

7.4.8 Defective FAX RECEIVE (4)

??? Description The received data is reduced by more than 50% in the printing.

7.4.9 Defective Automatic Receiving

??? Description The automatic receiving function is not working.

7-20 Service Manual

Troubleshooting

7.5 Copy Problems

7.5.1 White Copy

7.5.2 Black Copy

Service Manual 7-21

Troubleshooting

7.5.3 Abnormal noise

7.5.4 Defective Image Quality

7-22 Service Manual

Troubleshooting

7.6 Scanning Problems

7.6.1 Defective PC Scan

7.6.2 Defective Image Quality of PC Scan

??? Description The image PC scanned is not clear or bad.

Service Manual 7-23

Troubleshooting

7.7 Toner Cartridge Service

It is not guaranteed for the default caused by using other toner cartridge other than the cartridge supplied by the or caused by non-licensed refill production.

7.7.1 Precautions on Safe-keeping of Toner Cartridge

Excessive exposure to direct light more than a few minutes may cause damage to the cartridge.

7.7.2 Service for the Life of Toner Cartridge

If the printed image is light due to the life of the toner , you can temporarily improve the print quality by redistributing the toner(Shake the toner cartridge), however, you should replace the toner cartridge to solve the problem thoroughly .

7.7.2. 1 Redistributing Toner

When the toner cartridge is near the end of its life, white streaks or light print occurs. The LCD displays the warning mes- sage, ???Toner Low.??? You can temporarily reestablish the print quality by redistributing the remaining toner in the cartridge.

7.7.3 Service for Judgement of Inferior Expendables and the Standard of Guarantee

Please refer to User's Manual or Instructions on Fax/Printer Expendables SVC for the judgement of inferior expend - ables and the standard of guarantee besides this service manual.

7-24 Service Manual

Troubleshooting

7.7.4 Signs and Measures at Poor toner cartridge

Service Manual 7-25

Troubleshooting

7-26 Service Manual

Troubleshooting

Service Manual 7-27

Troubleshooting

7.8 Network Problems Troubleshooting

7.8.1 General Problems

7-28 Service Manual

Troubleshooting

7.8.2 Macintosh Problems

7.8.3 Windows Problems

Service Manual 7-29

Troubleshooting

7.8.4 SyncThru Installation Problems

7-30 Service Manual

Exploded View & Parts List

8.3 Middle Cover Ass'y

5

4

6

2

8-4 Service Manual

Exploded View & Parts List

8.7 Fuser Drive Ass'y

0

53

5 8

7 6

1

2

4

9

8-8 Service Manual

Exploded View & Parts List

8.11 Cover Platen Ass'y

8-12 Service Manual

Exploded View & Parts List

8.12 OPE Unit

0

2

1

3

5

4

6

7

8

Service Manual 8-13

Exploded View & Parts List

8.13 Scanner Ass'y

1

1-2

1-5

1-5

1-4

1-3

2

2-1

8-14 Service Manual

??

??

??

??

??

??

??

??

Block Diagram

99. Block Diagram

Connection Diagram

1010. Connection Diagram

Service Manual 10-1