Apple Laserwriter Pro 810 Service Manual

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LaserWriter Pro 810

Service Technical Documentation

Table of

Contents

Section 1.

Introduction

Section 2.

Setup Menu

Section 3.

Preventive Maintenance

Section 4.

Take Apart

Section 5.

Troubleshooting

Section 6.

Interface Configurations

Appendix A.

Memory Expansion Upgrade

Appendix B.

Illustrated Parts List

All rights reserved. No part of this document may be reproduced without the express permission of Apple Computer, Inc.

The material in this document is for informational purposes and is subject to change without notice Apple Computer, Inc. assumes no responsibility for errors or omissions in this document. Nor is any liability assumed for any damages resulting from the use of the information it contains.

TRADEMARK ACKNOWLEDGEMENTS

HP Laserjet Series IIP is a trademark of Hewlett Packard, Inc. PostScript is a registered trademark of Adobe System Incorporated.

Apple and LaserWriter are a registered trademarks of Apple Computer, Inc. Macintosh is a trademark licensed to Apple Computer, Inc.

First Edition June 1993

WARNING

FCC Regulations state that any unauthorized changes or modifications to the equipment not expressly approved by the manufacturer could void the user's authority to operate this equipment.

NOTE

This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation.

If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

Reorient the receiving antenna.

Increase the separation between the equipment and receiver.

Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

Consult the dealer or an experienced radio/TV technician for help.

NOTE

In order to maintain compliance with FCC regulations, shielded data cables must be used with this equipment.

BESCHEINIGUNG DES HERSTELLERS/IMPORTEURS

Hiermit wird bescheinigt, daß der Laser Drucker Typ LaserWriter Pro 810 in Übereinstimmung mit den Bestimmungen der Vfg. 1046/1984 funk-entstört ist.

Der Deutchen Bundespost wurde das Inverkehrbringen dieses Gerätes angezeigt und die Berechtigung zur Überprüfung der Serie auf Einhaltung der Bestimmungen eingeräumt.

Apple Computer, Inc.

CERTIFICATE OF MANUFACTURER/IMPORTER

This is to certify that the Laser Printer Model LaserWriter Pro 810 is shielded against radio interference with the provisions of Vfg. 1046/1984.

The German Postal services have been advised that this device is being put on the market and are entitled to inspect the series for compliance with the regulations.

Apple Computer, Inc.

USER SAFETY

The Printer is certified as a Class 1 laser product under the U. S. Department of Health and Human Services (DHHS) Radiation Performance Standard according to the Radiation Control for Health and Safety Act of 1968. The product is safe to use during normal operation and maintenance.

Protective housing and external covers completely confine the laser light emitted inside the printer. The laser beam cannot escape from the machine during any phase of normal user operation.

CAUTION

Performance of procedures other than those specified in this manual could result in hazardous radiation exposure.

Regulations implemented on August 2, 1976, by the Center for Devices and Radiological Health (CDRH) of the U. S. Food and Drug Administration (FDA) apply to laser products manufactured from August 1, 1976. Laser products sold in the United States must comply with these regulations.

This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications.

Le present appareil numerique n'emet pas de bruits redioelectriques depassant les limites applicables aux appareils numeriques de la class A prescrites dans le Reglement sur le brouillage radioelectrique edicte par le ministetre des Communications du Canada.

LITHIUM BATTERY INFORMATION

CAUTION

Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer. Dispose of used batteries according to the manufacturer's instructions.

A "dead" lithium battery is considered hazardous waste and has some potential for explosion if improperly handled. Mark the battery "Dead". Place it in a ziplock wrapper and the packaging used to ship the replacement battery, and return the dead battery to Apple, where it will be disposed of following EPA guidelines. Exception: If the battery is physically damaged, do not return it to Apple. Dispose of the battery locally according to local ordinances.

(Instructions for replacing the battery are given in this manual.)

CAUTION

Invisible laser radiation when open and interlocks defeated. Avoid exposure to laser beam.

LaserWriter Pro 810

Section 1: Introduction

LaserWriter Pro 810

Nov 93

Introduction/1-2

GENERAL

The printer consists of two major blocks—the controller and the print engine. The controller functions as the interpreter of the source print data and creates dot pattern information. The print engine prints the data based upon the dot pattern information it receives from the controller.

The print engine includes the Laser Scanner Unit (laser/optical unit), EP cartridge (developer, drum, toner, main charger), and paper feed mechanisms. The print engine mechanisms are controlled by the DC Controller.

This section of the manual describes the overall print process, Laser Scanner Unit functions, and DC Controller functions. Locations of other major parts and assemblies are provided as well as a brief description of their functions.

NOTE: Many of the drawings in this manual show a two-tray model of the LaserWriter Pro laser printer. All pictures of the two-tray model used in this manual accurately represent the three-tray LaserWriter 810.

Apple Computer does not include a two-tray printer in the LaserWriter 810 product offering. If this manual is revised in the future the graphics will be changed to reflect the three-tray configuration.

LaserWriter Pro 810

Nov 93

Introduction/1-3

PRINTING PROCESS

MAIN

CHARGER

ERASE LAMP

LASER SCANNER

UNIT

 

DRUM

HEAT ROLLER

 

PAPER PATH

PRESSURE

ROLLER

DRUM CLEANING

DETACK

TRANSFER

BLADE

SAW

CHARGER

EP CARTRIDGE

MAGNETIC

ROLLER

TRANSPORT

CHUTE

FIRST TRAY

SECOND TRAY

THIRD TRAY

CONTROLLER

WAFER BOX

FEED

ROLLERS

Charging

The main charger places a negative charge on the drum.

Exposure

When an image signal is received, the laser emits light to the drum and

 

erases the negative charges to form an electrostatic latent image.

Developing

The magnetic roller is covered by a thin film of magnetic toner. The toner

 

(negatively charged) is attracted to the latent image on the drum and forms

 

a visible image on the drum.

T r a n s f e r

The transfer charger applies a positive charge to the bottom surface of

 

paper that transfers the toner image from the drum to the paper.

Separation

The paper is separated from the drum by a combination of the detack saw

 

bias voltage and the paper's characteristics.

Fusing

The toner image is fused to the paper by the heat and pressure applied by

 

the fuser rollers.

Cleaning

The cleaning blade scrapes off any residual toner on the drum. At the same

 

time, the erase lamp transmits light to the drum and erases any residual

 

electrical charge. Following the cleaning process the print process starts

 

again from the charging cycle.

LaserWriter Pro 810

Nov 93

Introduction/1-4

PART NAMES AND PART FUNCTIONS

 

LASER SCANNER

 

UNIT

 

HIGH VOLTAGE

DC CONTROLLER

POWER SUPPLY

MAIN MOTOR

LOW VOLTAGE

FUSER

FAN

POWER SUPPLY

ASSEMBLY

 

TABLE 1-1. PART NAMES AND FUNCTIONS

Name

Main function

Main Motor

Supplies the main mechanical drive for the printer. A fan on the

 

motor shaft cools the drive unit.

Laser Scanner Unit

Receives a signal from the user system through the DC Controller

 

board, and converts the signal into a laser beam that is transmitted to

 

the drum to form an electrostatic latent image.

Low Voltage Power

Generates the +5, +15, and +24 voltages for the various printer

Supply (LVPS)

assemblies from the AC voltage input. Includes the main power

 

switch.

High Voltage Power

Generates the high DC/AC voltage for the transfer charger, main

Supply (HVPS)

charger, and magnetic roller.

DC Controller

Controls the whole operation of the printer based on data from each

 

sensor and commands from the user system.

Fuser Fan Assembly

Serves as the exhaust fan to prevent temperature in the printer from

 

rising.

Apple Laserwriter Pro 810 Service Manual

LaserWriter Pro 810

Nov 93

 

Introduction/1-5

 

PRE-REGISTRATION

 

 

 

SENSOR

 

TONER OUT

ERASE LAMP

 

 

SENSOR

 

PAPER

EP CARTRIDGE

 

 

OUT

SENSOR

 

SENSOR

INTERLOCK

 

 

 

SWITCH

 

 

 

TRANSPORT ROLLER

 

 

 

CLUTCH

 

 

 

REGISTRATION

 

 

FUSER THERMOSTAT

CLUTCH

 

 

 

PAPER FEED

 

TEMPERATURE

 

 

SENSOR

SOLENOID

 

 

 

 

 

EXIT

 

 

 

SENSOR

 

CONTROL PANEL

 

 

ASSEMBLY

 

 

PAPER SIZE

 

 

POWER

SENSOR

 

 

 

 

 

SWITCH

 

 

TABLE 1-1. PART NAMES AND FUNCTIONS (CONTINUED)

Name

Main function

 

 

Control Panel Assembly

Displays the printer's operating status, error messages, and corrective

 

actions. The keypad is used for setting printer operating parameters.

Erase Lamp

Light Emitting Diodes (LED) used to erase any residual charge on the drum.

Power Switch

Turns AC power supply ON and OFF. The switch is part of the LVPS.

Cartridge Sensor

Determines that the EP cartridge is seated correctly.

 

Temperature Sensor

Detects the surface temperature of the heat roller and transmits a signal to

 

the DC Controller board to keep the heat roller temperature constant.

Fuser Thermostat

Shuts off AC voltage to the fuser bulb when heater roller temperature gets

 

too high because of trouble with the temperature sensor, DC Controller, etc.

Paper Size Sensor

Detects the size of a cassette installed in the printer by a combination of

 

“ON" and “OFF" signals transmitted by four independent sensors.

Paper Out Sensor

Detects the absence of paper in the paper cassette.

 

Interlock Switch

When the top cover is opened, the AC power for the fuser bulb, 24 VDC, and

 

15 VDC is interrupted and the printer stops immediately.

Exit Sensor

Detects a paper jam at the paper exit.

 

 

Toner Empty Sensor

Detects a no toner condition in the EP cartridge.

 

Pre-Registration Sensor

Detects paper movement as well as no paper conditions when using the

 

manual feed guide.

 

 

Registration Clutch

Rotates and stops the registration roller to position paper for a toner image

 

transfer from the drum.

 

 

Paper Feed Solenoid

Electrically controls the rotation/stop operation of the feed roller that

 

moves the paper from a cassette.

 

 

Transport Roller Clutch

Controls rotation/stop operation of the transport roller that moves the

 

paper from the cassette to the upper transport roller

or registration roller.

LaserWriter Pro 810

EXPOSURE PROCESS

MIRROR 2

POLYGON

MIRROR

LENS 1

Nov 93

Introduction/1-6

LENS 2

MIRROR 1

WINDOW

SOS

SENSOR

LASER DIODE

AND CYLINDER DRUM

LENS

Except for the semiconductor, diode-type laser, the printer uses the same Xerographic process as conventional copiers. When the printer receives a print start signal from the I/O Controller, the laser diode starts emitting light.

The laser beam from the laser diode is collimated by a cylinder lens before being transmitted to the polygon mirror. The six-sided polygon mirror is driven by the scanner motor that rotates at a constant speed (RPM). Each rotation of the polygon mirror causes one scan line.

The laser beam, reflected by the polygon mirror, is transmitted to the drum through lenses 1 and 2, mirrors 1 and 2, and the window. On the right side of mirror 2 is a mirror for the Start of Scan (SOS) sensor. This configuration keeps a constant scanning position for each scan line.

LaserWriter Pro 810

Nov 93

Introduction/1-7

DC CONTROLLER FUNCTIONS

The DC Controller has the following main functions.

User System/Printer Communications

Receives video data synchronized with the video clock signal from the I/O Controller and sends the video data synchronization signal and status signal to the I/O Controller.

Sensor And Switch Signal Detection

Inputs signals from the sensors and switches that detect the status of the printer before and during the print sequence.

Laser Scanner Unit Control

Monitors the scanner motor RPM and receives the SOS (Start of Scan) signal to synchronize the start of laser beam scanning. Sends the video print data to the Laser Scanner Unit in synchronization with the SOS signal.

Control Panel Display and Input

Displays error and status messages. Receives the input signals from the keypad.

Print Sequence Control

Using sensor data and timers, it controls the print sequence of paper feed, movement, and discharge.

Engine Self-Test and Diagnostics

The self-test print and diagnostic functions aid in the detection of print engine errors and malfunctions.

LASER SCANNER UNIT BOARD FUNCTIONS

The board in the Laser Scanner Unit has the following functions:

Receives video data from the DC Controller board and uses it to control the laser beam to form a latent image on the drum.

Controls the scanner motor so that it keeps rotating at a constant speed.

LaserWriter

Pro 810

 

 

 

Nov 93

 

 

Introduction/1-8

PRINTER

SPECIFICATIONS

 

 

 

 

 

 

 

 

 

 

 

 

TABLE 1-2. PRINTER SPECIFICATIONS

ITEM

 

 

 

 

DESCRIPTION

 

 

 

 

Type

 

 

 

 

Desk top type

 

 

 

 

Page description

Postscript Level 2 and HP LaserJet IIP

language/Emulation

 

 

 

 

 

 

 

Printing

system

Laser xerography system; Write black.

Print speed, maximum

20 sheets per minute

 

Resolution

 

 

300,400,600,

and

800

dots/inch.

Paper feed

 

 

Cassette paper feed

 

 

 

 

 

 

 

 

Manual paper feed

 

 

 

 

 

 

 

 

 

Multi media power feeder (Option)

Paper

cassettes,

Standard

in 115 volt printers:

standard

 

 

 

 

Letter

(8.5"

x

11")

 

 

 

 

 

 

 

Ledger (11"

x

17")

 

 

 

 

 

 

Standard

in 220/240 volt printers:

 

 

 

 

 

 

 

A3 (297 mm x 420 mm)

 

 

 

 

 

 

 

A4 (210 mm x 297 mm)

Optional cassette sizes

Letter

(8.4" x

11")

 

 

 

 

 

 

 

 

US Ledger (11" x 17")

 

 

 

 

 

 

 

Universal - all standard sizes

Paper sizes, manual feed

Paper size: A4LEF, A4SEF, Executive, Legal, Letter LEF,

 

 

 

 

 

 

Letter SEF, Folio, B4, B5 and Invoice.

 

 

 

 

 

 

Envelope Size: Com-10, Monarch, C5, and DL

Paper weight

 

Cassette feed:

52-82 g/m2 paper

 

 

 

 

 

 

Manual feed: 52-139 g/m2 paper or postcard stock 190

 

 

 

 

 

 

g / m 2

 

 

 

 

 

 

Paper capacity

 

Cassette:

250 sheets (64 g/m2 paper)

 

 

 

 

 

 

Multi media power feeder:

 

 

 

 

 

 

 

100 sheets (64 g/m2 paper)

 

 

 

 

 

 

 

15 envelopes

 

 

Exit

tray

capacity

Face up:

250 sheets (64 g/m2 letter -size paper

 

 

 

 

 

 

Face down: 250 sheets (64 g/m2 letter-size paper)

Printer

size

in

millimeters

Width

Depth

Height

 

 

 

 

 

 

 

5 1 9

4 1 0

4 8 7

 

 

Printer

size

in

inches

Width

Depth

Height

 

 

 

 

 

 

 

20.4 16.14

19.17

 

Printer

weight

 

24.6 Kg,

54.23 lbs.

 

 

Warm-up

time

 

approximately 1 minute, at room temperature (22oC to 35oC

 

 

 

 

 

 

or 72oF to 95oF).

 

 

 

Time to

first print

approximately

20

seconds

Noise level

 

 

During operation:

53 dBA or less

 

 

 

 

 

 

During standby: 40 dBA or less

Power supply

 

115 +10 VAC, 50/60 +2 Hz or

 

 

 

 

 

 

220/240 VAC, 50/60 +2 Hz (International market)

Power consumption

Maximum 0.8 kW or less

Working Temperature

10o to 35oC (50o

to 95o F)

Humidity

 

 

 

15% to 85% RH non-condensing

LaserWriter Pro 810

Nov 93

Introduction/1-9

STORING CONSUMABLES

Paper should be stored in a cool, dry place. Keep it out of direct sunlight. Avoid storing paper in an area with high humidity. When the printer isn't going to be used for a long time, remove all the paper from the cassettes and wrap it in the original wrapper.

EP Cartridges should be stored in a cool, dry place. Do not store them in direct light. Avoid storing the EP cartridges in areas with high temperature and humidity (0-35o C, 32-95o F and 10-80% relative humidity). Do not store the cartridges on their sides or on end.

Be especially careful of conditions that could cause condensation to form on the drum.

LaserWriter Pro 810

Section 2: Setup Menu

LaserWriter Pro 810

Nov 93

Setup Menu/2-2

This section tells you how to use the Setup Menu to change the printer's operating parameters. Operating parameters, such as input port, printer type, and paper source are set through the Setup Menu.

The control panel keys that are used to get around in the setup menu are illustrated and described below. See the User's Manual for more detailed instructions for using the Setup Menu.

ONLINE FORM MENU

FEED

RESET PRINT ENTER

STATUS

MENU

Press to enter the Setup Menu after the printer is off-line. Press ENTER to select a value.

ENTER

Press to select a menu item or a displayed value. Press to permanently save any changes made to the setup menu. The changes are retained even if the printer is turned off.

Press to scroll through a menu or sub-menu level.

ONLINE

Press to exit the setup menu. Press in response to a SAVE SETTING? message to temporarily save any changes made to the menu settings. These changes are lost when the printer is turned off.

FORM

FEED

The form feed key is not operational

LaserWriter Pro 810

Nov 93

Setup Menu/2-3

The messages that you may encounter while using the setup menu are listed and described in Table 2-1. Instructions for using the setup menu are in the User's Manual.

Menu Message

Description

SAVE SETTINGS?

After changes have been made to the setup

ENTER=PERMANENT

menu, the ENTER and ONLINE prompts are

ONLINE=TEMPORARY

displayed alternately until the ONLINE or

 

ENTER key is pressed.

TEMPORARY

After setup menu changes have been

 

temporarily saved by pressing the ONLINE key,

 

this message is displayed.

PERMANENT

After setup menu changes have been

 

permanently saved by pressing the ENTER key,

 

this message is displayed.

FACTORY SETUP?

When RESTORE FACTORY SETUP is selected

ENTER=RESTORE

from the Misc. menu, the ENTER and ONLINE

ONLINE=CANCEL

prompts are displayed alternately until the

 

ONLINE or ENTER key is pressed.

The Setup Menu for the printer works like many menu-driven software packages. When you select an item in one menu, another menu may be called up. You can continue to choose from each new menu until you get to the selection you need.

The Setup Menu is illustrated in the diagram on the following pages. In the diagram, the first item listed in a sub-menu is the factory default. After changes have been made, the newly selected items or values are listed first in the sub-menus. Each time you enter the Setup Menu, you are returned to the menu or sub-menu that was displayed when you left it.

NOTE: An asterisk (*) appears in the message window when an item is selected.

LaserWriter Pro 810

MENU:Level 1

POSTSCRIPT

RESOLUTION

MENU:

INPUT PORT

Level 1

Nov 93

Setup Menu/2-4

Level 2

Level 3

Level 4

Level 5

POSTSCRIPT RESOLUTION 300, 400, 600, 800

INPUT PORT

PARALLEL

INPUT PORT

RS232

Level 2

PARALLEL

ENABLE

PARALLEL PRINTER TYPE

RS232

ENABLE

RS232

BAUD

RS232

PARITY

RS232

FLOW CONTROL

RS232

STOP BITS

RS232 DATA BITS

Level 3

ENABLE

 

YES (N0)

 

PRINTER TYPE

 

POSTSCRIPT

 

(LJETIIP)

 

ENABLE

 

YES (NO)

 

BAUD

 

9600 (19200,

 

38400, 300, 600,

 

1200, 2400,

 

4800)

 

PARITY

 

NONE (EVEN, ODD,

 

MARK, SPACE)

 

FLOW CONTROL

 

XON-XOFF (DTR)

 

STOP BITS

 

1 (2)

 

DATA BITS

 

8

(7)

 

Level 4

Level 5

LaserWriter Pro 810

MENU:Level 1

INPUT PORT

MENU:

MISC

Level 1

Level 2

INPUT PORT

LOCALTALK

MISC RESTORE FACTORY SETUP

MISC EXIT JAM REPRINT

MISC

START-UP PAGE

MISC

SCSI DELAY

Level 2

Nov 93

Level 3 RS232 PRINTER TYPE

LOCALTALK

ENABLE

PRINTER TYPE POSTSCRIPT (LJET IIP)

EXIT JAM REPRINT DISABLE (ENABLE)

START-UP PAGE ENABLE (DISABLE)

SCSI DELAY: OFF

(20, 40, 60) Level 3

Setup Menu/2-5

Level 4

Level 5

PRINTER TYPE

 

POSTSCRIPT

 

(LJET IIP)

 

ENABLE

 

YES (NO)

 

Level 4

Level 5

LaserWriter Pro 810

MENU:Level 1

PAPER SOURCE

Level 1

Level 2

PAPER SOURCE TRAY 1 (TRAY 2, TRAY 3)

PAPER SOURCE AUTO CASCADE

PAPER SOURCE M-M PWR FEEDER

PAPER SOURCE MANUAL FEED

Level 2

Nov 93

Setup Menu/2-6

Level 3

Level 4

Level 5

AUTO CASCADE

 

 

TRAY 1 & 2 & 3

 

 

(TRAY 1 & 2,

 

 

TRAY 1 & 3,

 

 

TRAY 2 & 3)

 

 

M-M PWR FEEDER

 

 

LETTER(8.5X11)

 

 

[LEGAL(8.5X14),

 

 

STAT(5.5X8.5),

 

 

EXEC(7.25X10.5),

 

 

FOLIO(210X330),

 

 

A4(210X297),

 

 

A5(210X148.5),

 

 

B5(182X257),

 

 

COM-10 ENV,

 

 

MONARCH ENV,

 

 

INT'L DL ENV,

 

 

INT'L C5 ENV]

 

 

MANUAL FEED

 

 

LETTER, LEF

 

 

(LEDGER, SEF

 

 

LEGAL, SEF

 

 

STATEMENT, SEF

 

 

EXECUTIVE, SEF

 

 

LETTER, SEF

 

 

A4, SEF

 

 

A4, LEF

 

 

A5, SEF

 

 

A5, LEF

 

 

B5, LEF

 

 

B4, SEF

 

 

ENV COM-10, SEF

 

 

ENV MONARCH SEF

 

 

ENV DL SEF

 

 

ENV C5, SEF

 

 

Level 3

Level 4

Level 5

LaserWriter Pro 810

Nov 93

Setup Menu/2-7

The POSTSCRIPT RESOLUTION menu selects either 300, 400, 600 or 800 Dots-Per-Inch (DPI) resolution whenever POSTSCRIPT is the selected printer type. Changing the resolution to 400, 600 or 800 (DPI) has no effect when the printer type is LJET IIP (HP LaserJet IIP).

The printer has three Input/Output (I/O) connectors available. Since a different system can be connected to each of the I/O connectors, the printer can be shared by three user systems.

NOTE: PostScript documentation refers to the printer interfaces (I/O) as channels. Port is another word sometimes used to refer to the interface connectors and circuitry.

When the printer is shared by two or more systems, the interfacing circuitry checks or polls each interface for incoming data. When data is received on a port, that job is processed without interruption. Once the job is completed, polling for incoming data resumes.

The Input Port Menu lets you disable an interface and/or set up the required operating parameters that control communication between the computer system(s) and the printer. The two serial channels can each be set up with different protocols and baud rates.

The Input Port Menu also lets you select the PRINTER TYPE for each channel. All three ports can be setup with PostScript as the Printer Type. However, a combination of PostScript and HP LaserJet Series IIP can be implemented. The printer type factory default for all three ports is Postscript.

LaserWriter Pro 810

Nov 93

Setup Menu/2-8

The Miscellaneous Menu is a selection of several miscellaneous features and functions of the printer. It includes:

resetting the printer to the factory defaults (RESTORE FACTORY SETUP)

enabling the EXIT JAM REPRINT function

disabling the START-UP PAGE function

setting a delay time for a hard disk drive

selecting the language for the control panel messages

RESTORE FACTORY SETUP can be used whenever the printer needs to be reset to the factory defaults. This is useful if changes have been made that do not seem to be functioning as planned.

Three factory defaults, one of which is selectable from the Setup Menu, cannot be changed by the RESTORE FACTORY SETUP. The three are Display Language, printer name, and page count.

The EXIT JAM REPRINT function enables the printer to reprint a page that may be in the exit area when a jam occurs. This means that two pages, instead of one, are reprinted. Because reprinting two pages uses more of the printer memory, the function can be turned off to free more memory.

The START-UP PAGE function can be turned off after the printer is set up. However, printing the start-up page is a good way to be sure that the printer is operating correctly.

The SCSI DELAY function sets the length of time the printer will wait for a hard disk drive to come ready during the power on cycle. Some disk drives may take longer than the printer to power up. The delay avoids the possible problem of the printer not seeing the disk drive.

A DISPLAY LANGUAGE menu is displayed when this feature is supported. It lets you select the language that is used for the messages that are displayed on the control panel. English is the default.

The PAPER SOURCE Menu is used to select a paper source. If the printer model has only one cassette and the multi media power feeder is not installed, only manual feed and tray one are displayed on the Setup Menu. Manual feed and the multi-media power feeder both have sub-menus for selecting the paper and envelope sizes.

The Auto Cascade function can be enabled in this menu. For this feature to work, each cassette (tray) must contain the same paper size.

LaserWriter Pro 810

Section 3: Preventive Maintenance

LaserWriter Pro 810

Nov 93

Preventive Maintenance/3-2

GENERAL

This section describes a preventive maintenance procedure that should be carried out whenever other service is required by the user. By checking the printer on a service call, you can instruct the user about printer care and possibly prevent future problems. The procedure can be completed in 10 minutes or less.

PREVENTIVE MAINTENANCE PROCEDURE

1 . Record the total number of pages fed through the printer to date.

Turn the printer on while pressing the DOWN arrow key to enter the diagnostic mode.

Press the DOWN arrow key once again to enter the total counter display. The LED displays a cumulative count in six digits.

Estimate the life of the consumables from the counter reading.

2 . Check overall printer operation by doing the following:

• Turn off the printer.

Turn the printer on while pressing the ENTER key to enter the print test mode.

NOTE: If the multi media power feeder is installed, make several prints using it as the paper source. See Section 5 for more information about using the print test mode.

Make several prints in the test print mode.

Listen for abnormal noises as the test printout is printing.

Check the test printout for print quality problems.

3 . Check the transfer charger assembly.

CAUTION: Be careful not to break the charger and guide wires while cleaning the transfer charger.

Take out the transfer charger and clean it with a brush or a dry cloth.

Be sure to clean the transport rollers.

CAUTION: Do not expose the drum to light for more than five minutes. Print quality can deteriorate.

If the transfer charger is badly soiled, clean it with a cloth slightly moistened with water and then with a dry cloth.

4 . Check the fuser heat roller cleaner for paper dust and dirt build-up.

Remove the fuser heat roller cleaner from the fuser.

Remove deposits of paper dust and toner from the cleaning felt. A firm bristled brush may help.

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Preventive Maintenance/3-3

5 . Check the registration roller and transport chute.

Clean them with a brush and dry cloth.

If they are badly soiled, clean them with a cloth slightly moistened with water and then with a dry one.

NOTE: Do not leave any rollers dirty. Dirty rollers can cause print quality and paper handling problems.

6 . Check the fan exhaust inlet.

If the top cover is removed during maintenance, use a brush to remove the dirt, toner, and paper dust from the fan exhaust.

7 . Recheck printer operation.

Make several more test prints.

Check again for print quality, paper feed, and abnormal noises.

8 . Turn the printer off and on to enter the normal mode.

9 . Make a final print test by sending data from the users system.

1 0 . Report to the user any potential or real problems that you found.

LaserWriter Pro 810

Section 4: Take Apart Procedures

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Take Apart/4-2

GENERAL

Section 4 does not cover all printer parts. Some parts are omitted because they require neither adjustment nor special consideration in removing or installing them. If no Take Apart procedure is provided in this section, carefully check an installed part before removing it. For plug and connector locations, see the figures and table at the end of this section.

CAUTION: Turn the printer off and unplug the power cord before starting any Take Apart procedure.

Recommended Tools

The only tools needed to remove or install any assembly are:

1 . Screwdrivers, Philips head, several sizes and lengths (magnetized would be useful).

2 . Chip puller.

3 . Blade screwdriver (various sizes).

4 . Wire cutters.

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Take Apart/4-3

LIST OF TAKE APART PROCEDURES

 

 

POWER CORD COVER

4 - 5

 

TOPCOVER

4 - 7

 

FRONT COVER

4 - 8

 

LEFT COVER

4 - 9

 

RIGHT COVER

4 - 1 0

 

REAR COVER

4 - 1 1

 

ELECTRICAL BOX COVER

4 - 1 2

 

TRANSFER CHARGER/DETACK SAW ASSEMBLY

4 - 1 3

 

PAPER TRANSFER UNIT

4 - 1 4

 

REGISTRATION CLUTCH

4 - 1 5

 

PRE-REGISTRATION SENSOR

4 - 1 6

 

TRANSPORT CLUTCH (TRAY 1)

4 - 1 7

 

PAPER FEED ROLLER ASSEMBLY

4 - 1 8

 

PAPER FEED SOLENOID (TRAY 1)

4 - 1 9

 

PAPER OUT SENSOR (TRAY 1)

4 - 2 0

 

PAPER SIZE SENSOR (TRAY 1)

4 - 2 1

 

OUTER TURN-CHUTE ASSEMBLY

4 - 2 2

 

INNER TURN-CHUTE ASSEMBLY

4 - 2 3

 

TRANSPORT CHUTE ASSEMBLY

4 - 2 4

 

FUSER UNIT

4 - 2 5

 

FUSER BULB

4 - 2 7

 

FUSER THERMOSTAT

4 - 2 8

 

FUSER TEMPERATURE SENSOR

4 - 2 9

 

PAPER EXIT SENSOR

4 - 3 0

 

OUTER EXIT-CHUTE ASSEMBLY

4 - 3 1

 

DIRECTION CHUTE

4 - 3 2

 

INNER EXIT-CHUTE

4 - 3 3

 

EXIT ROLLER ASSEMBLY

4 - 3 4

 

BELT (FUSER AREA)

4 - 3 5

 

LASER SCANNER UNIT

4 - 3 6

 

ERASE ASSEMBLY

4 - 3 7

 

TONER SENSOR

4 - 3 8

 

TONER SENSOR BRACKET

4 - 3 9

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Take Apart/4-4

EP CARTRIDGE SENSOR BRACKET

4 - 4 0

EP CARTRIDGE SENSOR

4 - 4 1

FUSER FAN

4 - 4 2

DRIVE UNIT

4 - 4 3

LOW VOLTAGE POWER SUPPLY (LVPS)

4 - 4 5

CONTROL PANEL ASSEMBLY

4 - 4 6

HIGH VOLTAGE POWER SUPPLY (HVPS)

4 - 4 8

DC CONTROLLER

4 - 4 9

I/O CONTROLLER

4 - 5 0

FEEDER UNIT

4 - 5 2

LOWER CHUTE ASSEMBLY

4 - 5 3

PAPER OUT SENSOR (TRAY 2 & 3)

4 - 5 4

PAPER FEED ROLLER ASSEMBLY

4 - 5 5

PAPER FEED SOLENOID (TRAY 2 & 3)

4 - 5 6

PAPER SIZE SENSOR (TRAY 2 & 3)

4 - 5 7

OUTER TURN-CHUTE ASSEMBLY

4 - 5 8

INNER TURN-CHUTE ASSEMBLY

4 - 5 9

MULTI MEDIA POWER FEEDER

4 - 6 0

TOP COVER (MULTI MEDIA POWER FEEDER)

4 - 6 1

TRAY ASSEMBLY (MULTI MEDIA POWER FEEDER)

4 - 6 2

MULTI MEDIA FEEDER PCB

4 - 6 3

PAPER FEED SENSOR (MULTI MEDIA POWER FEEDER)

4 - 6 4

PAPER OUT SENSOR (MULTI MEDIA POWER FEEDER)

4 - 6 5

MOTOR ASSEMBLY (MULTI MEDIA POWER FEEDER)

4 - 6 6

FEED ROLLER ASSEMBLY (MULTI MEDIA POWER FEEDER)

4 - 6 7

TAKE-AWAY ROLLER ASSEMBLY(MULTI MEDIA POWER FEEDER)

4 - 6 8

RETARD ASSEMBLY (MULTI MEDIA POWER FEEDER)

4 - 6 9

FAX CARTRIDGE INSTALLATION

4 - 7 0

PLUG/CONNECTOR LOCATIONS

4 - 7 3

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Nov 93

Take Apart/4-5

POWER CORD COVER

 

 

Removal

To remove the power cord cover:

 

 

1 . Carefully pull the rear end of the power cord cover away from the side

of the printer. Use a coin, or similar object, if needed, to pry the cover loose.

2 . Slide the whole cover toward the front of the printer until it can be removed.

POWER

CORD

COVER

FIGURE 4-1. POWER CORD COVER REMOVAL

I n s t a l l a t i o n To install the power cord cover:

1 . Lay the power cord along the base of the printer. Be sure the power cord is secured by the hooks provided

POWER

CORD

HOOKS COVER

FIGURE 4-2. POWER CORD COVER INSTALLATION

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Take Apart/4-6

2 . Attach the front of the power cord cover to the printer.

3 . Carefully press on the rear end of the cover to lock it in place.

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810

Nov 93

Take Apart/4-7

TOP COVER

 

 

 

Removal

To remove the top cover:

 

 

1 . Turn off the printer and unplug the power cord from the electrical

 

 

outlet.

 

 

2 .

Open the top cover. Remove the EP cartridge and put it in a safe place.

 

3 .

Raise the top cover as far as possible.

 

 

4 . Loosen the two front screws with the silver flanges.

 

 

5 .

Push back on the top cover and then lift it upward to remove it.

TOP

COVER

COVER

SCREWS

FIGURE 4-3. TOP COVER REMOVAL

I n s t a l l a t i o n To install the top cover:

Reverse the removal procedure.

CAUTION: Be sure that the hooks on the rear of the cover are engaged with the frame.

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