Apple 12-600PS, 12 660PS Service manual

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Apple 12-600PS, 12 660PS Service manual

Color LaserWriter 12/600 PS and 12/660 PS

Service Technical Documentation

5/95

Rancourt

Steve

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K Service Source

Color LaserWriter

Color LaserWriter 12/600 PS

Color LaserWriter 12/660 PS

Color LaserWriter 12/660 PS

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Color LaserWriter 12/660 PS

3–2

 

 

 

Overview

 

The Color LaserWriter 12/660 PS is an enhanced version of the

 

original Color LaserWriter 12/600 PS. The 12/660 engine and

 

plastics are identical to the original in every respect, and all

 

finished goods and service part numbers apply equally to both

 

printers. The sole differences between the two versions are in

 

the packaging and setup, the ROM and RAM on the I/O

 

controller board, and the driver software.

Packaging and

The Color LaserWriter 12/660 PS requires two extra steps

Setup Changes

during setup, the leveling of the printer and the removal of oil

 

absorption sheets from the fuser assembly.

 

Note: The orange flag that identifies the shipping screw has

 

also been enlarged in the new version of the printer.

 

The leveling procedure helps to alleviate oil overflow problems

 

within the fuser assembly. The level and shim kit that comes

 

with the 12/660 PS is also available separately as P/N 076-0622

 

for those who would to perform the procedure on the original

 

version of the printer. After removing the packing tape from

 

the outside of the printer, performing the leveling procedure

 

below before proceeding any further.

 

1 Remove the spirit level and the round black rubber shims from

 

their package. Snap the spirit level into its base.

 

2 Open the printer’s top access cover and place the spirit level on

 

top of the fuser to level the printer, first from front-to-back, then

 

from side-to-side.

Spirit Level

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Color LaserWriter 12/660 PS

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3Place the shims under the printer’s feet (as needed) to level the printer.

Shim

The oil absorption sheets have been installed to eliminate migration of silicon oil during shipping. After leveling the printer, remove the shipping spacers and absorption sheets as described below.

1Open the fuser access door and remove the two orange spacers and the oil absorption sheet from inside.

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Color LaserWriter 12/660 PS

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2Open the fuser assembly and remove the oil absorption sheet from the inside of the fuser assembly.

I/O Controller Board

The Color LaserWriter 12/660 PS comes standard with 16 MB

Changes

of DRAM and version 2.0 of ROM. All other characteristics of

 

the board remain the same.

 

Note: Version 2.0 of ROM contains fixes for variety of system

 

and networking bugs that have been reported since the release

 

of the original printer. (I/O controllers with 2.0 ROM will also

 

output new startup and demo pages). If you want to upgrade an

 

existing printer, see “Upgrade Path” later in this chapter.

Driver Software

The new version of the Color LaserWriter printer does not

 

require a driver upgrade. However, the printer name has

 

changed in ROM. Consequently, with older drivers you must

 

manually select the “LaserWriter Color 12/600 PS” PPD when

 

setting up the new printer in the Chooser.

 

Alternately, if copy the new “LaserWriter Color 12/660 PS”

 

PPD into the Printer Descriptions folder (path: System

 

Folder:Extensions folder), Chooser setup will be automatic.

 

This PPD can be found on the Service Source CD (path:

 

Service Manuals:Clips:CLW 12/660 PPD).

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Color LaserWriter 12/660 PS

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Upgrade Path

 

 

You can upgrade a Color LaserWriter 12/600 PS to a Color

 

 

LaserWriter 12/660 PS by installing version 2.0 ROMs onto the

 

 

customer’s I/O controller board. The version 2.0 ROM upgrade

 

 

kit is available as P/N 076-0621. The contains eight ROM ICs,

 

 

a user manual addendum, a software installation CD, and

 

 

upgrade labels.

 

 

Note: Install new ROM only if the customer’s printer is exhib-

 

 

iting one of the problems described below. Install a replace-

 

 

ment I/O controller board (P/N 661-0133) only if your

 

 

troubleshooting has found the board to be defective. All service

 

 

stock for the I/O controller board will include version 2.0 of

 

 

ROM.

 

 

After installing the new ROM, affix the labels that are provided

 

 

in the kit as described in the instructions that accompany the

 

 

ROM upgrade kit.

 

 

Caution: All but one of the bug fixes contained in version 2.0

 

 

of the ROM also appeared in version 1.2. If your I/O

 

 

controller board has version 1.2 of ROM, do not upgrade

 

 

unless it is specifically for the Windows 95 feature described

 

 

immediately below. You can identify the ROM version by

 

 

inspecting the margin text on the startup page.

Feature added in

Plug and play support for Windows 95

ROM v2.0

 

Plug and play support means that the user can connect the

 

 

 

 

printer to the system, boot Windows 95, and automatically see

 

 

the printer name in the “New Hardware Found” dialog box

 

 

during the installation process. After installation is complete,

 

 

the Device ID string and related information will be returned

 

 

whenever the printer is queried for its device id.

System bugs fixes

System error at address 0x132460

in ROM v1.2

 

When printing a complex document to the Color LaserWriter

 

 

 

 

12/600 PS, a page is printed stating “printer restarted due to

 

 

system error at address 0x132460.”

 

• System error at address @0x33F844

 

 

A bug in version 1.0 ROM caused certain complex Adobe Illus-

 

 

trator files to reset the printer and to print a page stating “printer

 

 

restarted due to system error at address @0x33F844.

 

Image stitching problem

 

 

When an image has a very fine line running across its body and

 

 

the line does not seem to belong to the image, that may be a

stitching problem. If the same problem occurs when printing to another printer, for example a LaserWriter 16/600 PS, the

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problem is likely in the application and the ROM upgrade will not help.

If possible, try printing the problem file to a printer with version 2.0 ROMs. If there is no improvement, then the problem is elsewhere.

NetWare port number not set properly

When setting the NetWare port number through the Apple Printer Utility, the number did not stick.

Changing AppleTalk type fails

Changing the AppleTalk “type” on version 1.0 ROMs fails when PAPTest is run through a LocalTalk port. (Unlikely to affect normal user).

EtherTalkZone and LocalTalkType strings

EtherTalkZone strings and LocalTalkType strings did not take input longer than 31 characters. (Unlikely to affect normal user).

LocalTalk ports turns off; EtherTalk remains active

In some cases, the LocalTalk port turned off after printing a very large number of PostScript test files to a printer using both EtherTalk & LocalTalk ports, even though the EtherTalk port remained active and could be seen from any host. (Unlikely to affect normal user).

Specific PostScript Code resets printer

Sending the following PostScript code caused the printer to reset itself (unlikely to affect normal user):

[(%disk1%) <</InitializeAction 1>> setdevparams]

PowerPoint v3.0 gradients

Some PowerPoint slides containing complex gradients or patterns would freeze the printer.

TraySwitch not saved

Enabling the TraySwitch feature on a Color LaserWriter 12/600-J (Kanji version) did not survive power cycles.

One-byte PostScript filename on printer hard drive

Creating a one-byte long PostScript filename on a printer’s hard disk caused an I/O error. (Unlikely to affect normal user).

Configuration switch and image data

This issue only affects printing from PC computers using the parallel port. Once the printer’s configuration switch was used,

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Color LaserWriter 12/660 PS

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the default protocol for the parallel port (TBCP) was changed

 

 

to Normal and not returned back to TBCP, regardless of config-

 

 

uration switch position. In this scenario text documents would

 

 

print, but documents with images (binary data) would not. The

 

 

printer’s ready light would flash for a while, stop, and then

 

 

nothing would print.

Networking bugs

NetWare polling

fixes in ROM v1.2

 

If the printer was in NetWare PServer mode configuration, it

 

 

 

 

would likely stop polling its NetWare print queue after being

 

 

powered on for more than 24 hours.

 

Name lengths increased

 

 

The pserver and rprinter name length has been increased to 47

 

 

characters maximum.

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Color LaserWriter 12/660 PS

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Installation Reimbursement Program

 

Beginning October 21, 1996, Authorized Apple Resellers and

 

institutions are entitled to receive a $150 reimbursement on the

 

installation(s) of the Color Laserwriter 12/660 PS.

 

Customers who purchase the printer beginning October 21,

 

1996 are entitled to have the printer set up and installed in the

 

location of their choice at their site.

How customers will

A letter will be included with the printer informing customers

be informed

to contact their Authorized Apple reseller, or Apple directly to

 

perform the installation.

 

This letter also stipulates special tasks for the customer to

 

perform before a service technician arrives at their location.

 

These tasks include:

 

• Preparing a suitable location for the printer.

 

• Having someone available to help the service technician lift

 

the printer from the floor to the table or counter.

 

• Providing appropriate power, networking connections, and

 

cabling.

 

• Ensuring that a network administrator (or other knowledge-

 

able person) is available for consultation with the service

 

technician.

 

• Providing a computer that is configured with the appropriate

 

system software and is functioning on the network.

 

• Arranging for the storage and disposal of packing materials.

 

If everything is prepared, the service technician should be able

 

to complete the setup and installation in about 45 minutes.

Installation

The file “CLW 12/660 Setup.pdf” is the first chapter of the

procedures

Color LaserWriter 12/660 PS. Read this chapter for the special

 

considerations required when setting up and installing this

 

printer. Click on the icon below to open the file.

96.11.13.15.58

1 Basics and Theory

Color LaserWriter 12/600 PS Basics & Theory 1–2

Chapter Contents

I General Information

 

Features .........................................................................................................

1–5

Specifications ..................................................................................................

1– 6

Safety Information ..........................................................................................

1–10

Laser Safety ..............................................................................................

1–10

Toner Safety ..............................................................................................

1–10

Ozone Safety ............................................................................................

1–10

Status Panel ...................................................................................................

1–11

Outline .......................................................................................................

1–11

Configurations ...........................................................................................

1–12

Density Control Panel ....................................................................................

1–13

Panel Layout .............................................................................................

1–13

Density Adjustments .................................................................................

1–14

Test Page Pattern Selection.......................................................................

1–15

Separation Voltage Designation ................................................................

1–16

Registration Adjustments ...........................................................................

1–17

II Basic Operation

 

Paper Path Animation .....................................................................................

1–19

Functions ........................................................................................................

1–20

Outline of Electrical System ...........................................................................

1–21

Outline of Major Circuit Boards ......................................................................

1–22

DC Controller Input/Output Signals ...........................................................

1–23

Mechanical Controller Board Input/Output Signals ...................................

1–26

Outline of Drive System .................................................................................

1–28

III

Laser/Scanner System

 

 

Laser System .................................................................................................

1–32

 

Scanner System .............................................................................................

1–38

IV

Image Formation System

 

 

Outline ............................................................................................................

1–41

 

Photoconductor Cartridge ..............................................................................

1–43

 

Toner Cartridge ..............................................................................................

1–44

 

Stages of Imaging ..........................................................................................

1–47

 

Stage 1: Electrostatic Latent Image Formation ........................................

1–48

 

Stage 2: Developing .................................................................................

1–50

 

Stage 3: Photosensitive Drum Cleaning ..................................................

1–51

 

Stage 4: Transfer .....................................................................................

1–53

 

Stage 5: Transfer Drum Cleaning and Discharge ....................................

1–57

 

Stage 6: Fusing ........................................................................................

1–59

 

High-Voltage Control ......................................................................................

1–60

 

Photosensitive Drum Life Detection ...............................................................

1–68

 

Toner Carousel Control ..................................................................................

1–71

 

Toner Cartridge Installation .......................................................................

1–73

 

Carousel Rotation ......................................................................................

1–75

 

Toner Cartridge Stop..................................................................................

1–79

 

Toner Cartridge Press ...............................................................................

1–80

 

Developing Cylinder Drive ........................................................................

1–81

 

Toner Cartridge Separation .......................................................................

1–82

 

Image Quality Stability Control .......................................................................

1–84

 

Temperature/Humidity Sensing System ....................................................

1–85

 

Density Calibration System .......................................................................

1–86

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Color LaserWriter 12/600 PS Basics & Theory 1–3

V Pickup/Feed System

 

Outline ............................................................................................................

1–89

Paper Pickup ..................................................................................................

1–90

Overhead Transparency Detection ................................................................

1–96

Cassette Pickup Board ...................................................................................

1–97

Transfer Drum and Peripherals ......................................................................

1–100

Gripper Control .........................................................................................

1–102

Attraction Roller ........................................................................................

1–103

Separation .................................................................................................

1–105

Transfer Drum Cleaning Assembly ...........................................................

1–106

Discharge Roller .......................................................................................

1–107

Cleaning Brush Motor Drive Circuit ...........................................................

1–109

Fuser Assembly ..............................................................................................

1–110

Transparency Mode ..................................................................................

1–112

Fuser Assembly Errors ..............................................................................

1–115

Oil Circulation System ...............................................................................

1–122

Fuser Cleaner Assembly ...........................................................................

1–124

Main Motor Drive Circuit .................................................................................

1–125

Paper Jam Detection ......................................................................................

1–126

Pickup Delay Jam .....................................................................................

1–127

Paper Top Position Delay Jam ..................................................................

1–128

Grip Jam ...................................................................................................

1–129

Separation Delay Jam ...............................................................................

1–130

Separation Stationary Jam ........................................................................

1–131

Delivery Delay Jam ...................................................................................

1–132

Delivery Stationary Jam ............................................................................

1–133

Multi-Fed Paper Stationary Jam ...............................................................

1–134

Non-Dedicated Transparency Jam ...........................................................

1–135

Wrong Paper Length Feed Jam ................................................................

1–136

Initial Residual Jam ...................................................................................

1–137

VI System Interface

Outline ............................................................................................................

1–139

Video Interface ...............................................................................................

1–140

VII Power Supply

Outline ............................................................................................................

1–143

Remote Switch ...............................................................................................

1–145

VIIISheet Feeder

Outline of Electrical Circuit .............................................................................

1–147

Sheet Feeder Controller Board Input/Output .................................................

1–148

Pickup/Feed System ......................................................................................

1–149

Power Supply .................................................................................................

1–150

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Color LaserWriter 12/600 PS

Basics & Theory

1–4

 

 

 

I.General Information

Color LaserWriter 12/600 PS Basics & Theory 1–5

 

Features

 

Some of the main features of the Color LaserWriter 12/600 PS are as

 

follows:

Print Quality

The printer has a resolution of 600x600 dots per inch, with color Photo-

 

Grade.

Speed

The printer prints up to 12 pages per minute in black, cyan, magenta, or

 

yellow; 3 pages per minute in two or more colors; and 1 transparency

 

per minute.

Multiplatform

You can connect the printer to Macintosh, Windows, DOS, and UNIX

Support

computers.

Connectivity

The printer offers LocalTalk, Ethernet, and parallel connections.

Automatic

Without any user intervention, the printer can accept jobs simulta-

Traffic Control

neously from AppleTalk, TCP/IP, and NetWare networks and from the

 

parallel port.

Fonts

The printer supports both TrueType and PostScript fonts. The printer

 

has 39 built-in PostScript fonts.

Energy

The printer can automatically lower its power consumption when it’s

Savings

not being used.

Hard Disk

You can install an internal hard disk or attach up to six external hard

Option

disks to store downloadable fonts.

Paper Handling

You can print up to 350 sheets (250 in the standard paper cassette plus

 

100 in the multipurpose tray) without changing paper. You can also add

 

a 250-sheet feeder.

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Color LaserWriter 12/600 PS Basics & Theory 1–6

 

 

Specifications

Marking

Canon HX LBP print engine

Engine

• 3 ppm in color; 12 ppm in black, cyan, magenta, or yellow; 1 ppm

 

 

 

 

 

for transparencies

 

 

• 600x600 dpi with Color PhotoGrade

 

 

• Enhanced 600 dpi grayscale imaging (effective 200-line screen half-

 

 

 

tone, 122 gray levels)

Laser

Semiconductor laser GaAlAs

 

 

Wavelength: 780 nm

 

 

• Output power: 1 mW

Controller

The specifications for the I/O controller board are as follows:

 

 

AMD Am29030 30-MHz microprocessor

 

 

• 8 MB of ROM (including 39 Type 1 fonts)

 

 

• 12 MB of RAM (16 MB on CLW 12/660); 8 MB soldered + 4 MB

 

 

 

(or 8 MB) SIMM

 

 

 

 

 

 

 

 

(expandable to 40 MB total)

 

 

 

• 128 K parameter SRAM

 

 

 

• SCSI interface for internal/external hard disk(s)

 

 

 

LocalTalk interface

 

 

 

 

 

 

 

• High-speed parallel interface (IEEE P1284 ECP, bidirectional)

 

 

 

 

• Ethernet interface with three protocols: EtherTalk, Novell NetWare

 

 

 

IPX (PSERVER or RPRINTER), and TCP/IP (BSD lpd)

 

 

• External Ethernet transceivers available for thin coaxial, twisted pair

 

 

 

(10Base-T), and thick coaxial (IEEE 802.3 AUI)

 

 

• Two-position communication configuration switch

 

 

• All ports/protocols simultaneously active

 

 

• Color-rendering acceleration

 

 

Data compression/decompression system

 

 

• Adobe PostScript Level 2 (version 2014)

True 600 dpi

The Color LaserWriter 12/600 PS is a true 600 dpi printer because

 

 

every aspect of its architecture is designed to a 600 dpi specification. In

 

 

addition, its 8-bit per pixel capability can assign levels of color or gray

 

 

to each pixel, thereby further enhancing print quality.

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Color LaserWriter 12/600 PS

Basics & Theory

1–7

 

 

 

Printer Fonts

The following fonts are resident in the printer ROM:

 

 

• AvantGarde Book, AvantGarde BookOblique, AvantGarde Demi,

 

 

 

AvantGarde DemiOblique

 

 

• Bookman Demi, Bookman DemiItalic, Bookman Light, Bookman

 

 

 

LightItalic

 

 

• Courier, Courier Bold, Courier BoldOblique, Courier Oblique

 

 

• Helvetica, Helvetica Bold, Helvetica BoldOblique, Helvetica

 

 

 

Narrow, Helvetica Narrow Bold, Helvetica Narrow BoldOblique,

 

 

 

Helvetica Narrow Oblique, Helvetica Oblique

 

 

• Helvetica Condensed, Helvetica Condensed Bold, Helvetica

 

 

 

Condensed BoldOblique, Helvetica Condensed Oblique

 

 

• NewCentury Schoolbook Bold, NewCentury Schoolbook Bold-

 

 

 

Italic, NewCentury Schoolbook Italic, NewCentury Schoolbook

 

 

 

Roman

 

 

• Palatino Bold, Palatino BoldItalic, Palatino Italic, Palatino Roman

 

 

 

 

 

 

 

 

 

Symbol

 

 

 

• Times Bold, Times BoldItalic, Times Italic, Times Roman

 

 

 

Zapf Chancery MediumItalic

 

 

 

Zapf Dingbats

 

 

 

 

 

 

 

Minimum life expectancy for the printer is 5 years or 300,000 pages in

Life

Expectancies

black and white or 150,000 color pages, with no monthly page limit.

 

 

Recommended maintenance interval is 60,000 pages due to wear on

 

 

fuser and rollers.

Toner Cartridge: 4,000 pages per color when printing documents with average page coverage of 5%.

Photoconductor cartridge: 40,000 pages black and white or 10,000 pages color (for continuous printing); 13,000 pages black and white or 6,500 pages color (printing only single-page documents).

Fuser oil life: 10,000 pages

Fuser assembly life: 60,000 pages

Transfer drum cleaner life: 60,000 pages

Ozone filter life: 60,000 pages

Air filter life: 60,000 pages

Separation Discharge Assembly life: 60,000 pages

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Color LaserWriter 12/600 PS

Basics & Theory

1–8

 

 

 

Speed

Prints 12 pages per minute in monochrome; 3 pages per minute

 

maximum in color; and 1 page per minute for transparencies. Actual

 

speed depends on the images printed and paper size.

Printing

Uses 16to 28-pound laser-quality bond (60 to 90 g/m2). Most textured

Materials

and colored stock is accepted but discouraged, as it will adversely

 

affect color print quality.

 

The paper used should not scorch, melt, transfer material, or release

 

hazardous emissions when heated to 200° C (392° F) for 0.1 seconds.

Transparencies

Use only Apple Color LaserWriter 12/600 PS Transparencies A4 or

 

Letter.

Paper Sizes

Supports U.S. letter and A4 in the standard paper cassette. The paper

and Capacity

cassette holds 250 sheets of 20-pound (75 g/m2) paper. The multipur-

 

pose tray can hold up to 100 sheets of standard U.S. letter paper, and

 

other paper sizes up to U.S. legal. Optional 250-sheet universal

 

cassettes are available that support letter, A4, B5, and U.S. legal paper

 

sizes. Cassettes are compatible with both the printer and the optional

Suggested

sheet feeder.

 

Apple has tested the following papers and found them to be acceptable.

 

Paper Brands

• Aussydat-lay (A4, France) 100 g/m2

 

 

 

 

• Boise Cascade Laser, 20 and 24 pound

 

 

• Classic Crest, 24 pound

 

 

 

 

• Hammermill Laser Print, 24 pound

 

• Legacy Laser Paper, 24 pound

 

• Nekoosa Laser 1000, 24 pound

 

• Neusiedler (A4, Austria) 100 g/m2

 

• Xerox 4024 (LTR and A4), 20, 24, and 28 pound

 

• Nekoosa Laser 1000, 24 pound

 

Note: Recycled paper is not recommended. It tends to produce more

 

paper dust, degrading image quality and necessitating more frequent

 

replacement of the fuser assembly.

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Color LaserWriter 12/600 PS

Basics & Theory

1–9

 

 

 

Dimensions

Height: 18 in. (46 cm)

 

Width: 21 in. (54 cm)

 

Depth: 23 in. (58 cm)

Weight

Approximately 110 lb. (50 kg) for the printer body only

Environmental

During printer operation: Temperature 50° to 86° F (10° to 30° C) and

Conditions

humidity 20 to 80 percent RH noncondensing (for optimum print

 

quality, operate at 35 to 70 percent RH)

 

In storage (both toner cartridges and printer): Temperature –4° to 104°

 

F (–20° to 40° C) and humidity 10 to 95 percent RH noncondensing

Acoustic

Standby, less than 45 dB

Output

Printing, less than 55 dB

 

Wait Times

• Either 120 or 240 V, 3.5 minutes maximum

 

• Either 100 or 220 V, 4.5 minutes maximum

Voltage

 

100 to 120 V (50/60 Hz) or 220 to 240 V (50 Hz), voltage tolerance

 

Requirements

plus or minus 10%

 

Power

Energy-saving mode

 

Consumption

• Approximately 42 W (meets EPA Energy Star)

 

 

 

 

Standby average

 

 

 

 

 

• 100/120 V, approximately 215 W

 

• 220/240 V, approximately 238 W

 

Operating average

 

• 100/120 V, approximately 535 W

 

• 220/240 V, approximately 524 W

 

Maximum power consumption

 

• 100/120 V, approximately 1.1 KW

 

• 220/240 V, approximately 1.0 KW

95.08.23.11.28

Color LaserWriter 12/600 PS

Basics & Theory

1–10

 

 

 

Safety Information

Laser Safety The invisible laser beam irradiated within the laser/scanner assembly can be harmful if it comes into contact with your eyes. Consequently, never disassemble the laser/scanner assembly. A cautionary label has been affixed to the top of the laser/scanner assembly.

Note: The laser/scanner assembly cannot be adjusted in the field, nor are any of its components available from Apple.

Laser Safety Label

Toner Safety If you get toner on your skin or clothes, remove as much as possible with dry tissue and then wash with cold water. Do not let toner come into contact with vinyl material.

Ozone Safety The charging roller and separation discharge assembly generate very small amounts of ozone gas when the printer is operating. The printer meets the Underwriters Laboratory (UL) ozone emission standard.

95.08.23.11.28

Color LaserWriter 12/600 PS

Basics & Theory

1–11

 

 

 

Outline

Movie

Status Panel

The Color LaserWriter 12/600 PS status panel consists of 4 primary and 17 secondary lights. The primary lights, arranged horizontally along the bottom of the panel, are similar to those on the LED panels on many of Apple’s previous printers.

During normal operation, primary lights report general readiness states for consumables, paper supply, and paper feed. Secondary lights report on specific consumables and highlight locations of a consumable, paper jam, or paper problems. The QuickTime movie to the left shows the normal operational behavior of the status panel when the printer starts up. See Chapter 2 for information on the Power-On Self Test (POST).

Toner Lights

Access Lights

Maintenance Lights

 

Waste

Fuser

M

Toner

Assembly

C

 

Bk

Y

 

 

Oil

Photo-

 

 

conductor

!

Ready/In-Use

 

 

Paper Jam

Light

Alert

Paper-Out

Light

 

Light

Light

 

 

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Color LaserWriter 12/600 PS

Basics & Theory

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= Flashing

Status Panel Lights

These are the possible arrays that customers can see during normal printer operation.

!

Description

Printer

Stops

 

Warming Up /Processing

Printer Ready

M

C

Y

Bk

M

C

Y

Bk

Access

Lights

Low Magenta

No

 

Low Cyan

No

 

Low Yellow

No

 

Low Black

No

 

Low Fuser Assembly

500 pages later

 

 

Low Fuser Oil

50 pages later

 

Photoconductor Warning

No

 

No Magenta Cartridge

Yes

 

No Cyan Cartridge

Yes

 

 

No Yellow Cartridge

Yes

 

No Black Cartridge

Yes

 

Toner Disposal Box Full

Yes

 

No Fuser Assembly

Yes

 

No Fuser Oil

Yes

 

No Photoconductor Cartridge

Yes

 

Door Open

Yes

 

(See "POST Code Matrix" in Chapter 2)

Yes

 

 

 

1

 

 

 

 

2

 

 

 

3

9

 

 

4

 

5

Access Lights

8

7

 

6

 

95.08.23.11.29

Color LaserWriter 12/600 PS

Basics & Theory

1–13

 

 

 

Density Control Panel

The density control panel on the rear of the printer can be used to generate a service test page and to set three distinct types of adjustments. Some adjustment settings are persistent (i.e., they will remain in effect after a printer restart), and some are nonpersistent (i.e., they will default to factory setting after a printer restart).

Panel Layout In addition to the test print button, the density control panel has four toner-indicator lights along the top, an LED density gauge in the middle, and four input buttons along the bottom of the panel.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Toner

 

M

 

 

 

C

 

 

 

 

 

 

Y

 

 

 

 

 

Bk

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Lights

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Density

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TEST

 

Gauge

 

COLOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DEFAULT

 

 

 

 

 

 

ENTER

 

 

 

 

 

SELECT

 

 

 

 

 

 

 

 

 

 

 

PRINT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TEST PRINT button: Press this button to generate a service test page.

Important: If the printer is in energy-saving mode, you must print to the printer or restart the printer before you can run a service test page.

ENTER button: Engages the currently selected value.

Note: The next four items are labelled on the panel according to their density adjustment functions. During other adjustments, ignore the labels and the functions described below.

COLOR SELECT button: Selects the color whose density you want to

adjust.

Density gauge: Indicates the currently selected density value for the selected color, light density to the left, dark to the right.

Note: During printer-ready state, you can tell if the density settings are not at the factory default by looking at the center density gauge LED above the word DEFAULT. If this LED is off, then the density settings have been changed from the default.

5Plus/minus (+/-) buttons: Advance the density gauge setting.

6Toner Lights: An illuminated toner light indicates the color that is being adjusted.

95.08.23.16.19

Color LaserWriter 12/600 PS

Basics & Theory

1–14

 

 

 

Density

This feature is offered for customers who have multiple Color Laser-

Adjustments

Writer 12/600 PS printers in a single location and need to adjust one

 

printer to match the output of another.

 

Important: The range of settings is limited. Use this feature only if

 

you have prior experience in four-color density adjustments.

 

The printer needs to be switched on and in a ready state to make density

 

adjustments. Density adjustments are persistent. To adjust the density,

1Press the COLOR SELECT button as many times as necessary until the desired toner light illuminates.

Selected Color

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

M

 

 

 

 

C

 

 

 

 

 

 

Y

 

 

 

 

 

Bk

 

 

 

 

TEST

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COLOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DEFAULT

 

 

 

 

 

 

ENTER

 

 

 

 

SELECT

 

 

 

 

 

 

 

 

 

 

PRINT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2Press the plus or minus button to change the setting for that color. The density gauge LED will light whenever the selected setting differs from the previously entered setting.

3Repeat steps 1 and 2 if you want to adjust other colors.

4Press the ENTER button to engage the settings.

Note: If you want to quickly return the printer to its factory defaults, press and hold both the plus and minus buttons for at least five seconds.

95.08.23.11.29

Color LaserWriter 12/600 PS

Basics & Theory

1–15

 

 

 

Test Page

This feature allows you to select one of six test page patterns based

Pattern

upon which one would best confirm a print quality issue.

Selection

Test pattern selection is nonpersistent. After restart, the test page

 

 

reverts to the vertical line pattern. To select a pattern,

1Hold down the COLOR SELECT button and press the ENTER button eight times. The four toner lights will flash to indicate that you are in the test pattern selection mode.

M C Y Bk

 

 

 

 

 

 

 

 

 

 

 

 

 

TEST

 

 

 

 

 

 

 

 

 

 

 

 

 

COLOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DEFAULT

 

 

 

ENTER

SELECT

 

 

 

 

PRINT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2Using the plus or minus buttons, advance the density gauge to illuminate the LED corresponding to the desired pattern. The density gauge will flash when the selected setting differs from the previously entered setting. Only LEDs 4 through 9 on the density gauge correspond to available patterns.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Grid

 

Vertical

 

Horizontal

 

Gradation

Solid

 

Solid

 

 

 

 

 

 

 

 

 

 

Lines

 

 

Lines

 

 

 

 

 

 

 

 

 

 

 

White

 

Colors

3Press the ENTER button to engage the setting. If you make no further adjustments, the panel will exit from the test pattern selection mode in 30 seconds.

Usage Tips

Each pattern will inherently reveal a different type of defect. For

 

example, color registration problems are revealed best by the grid

 

pattern, while dirty rollers are revealed by printing a solid white page.

 

Note: By measuring the distance between repeating print defects, you

 

can isolate the problem to a specific roller within the printer. See

 

“Roller Diameters” in Chapter 2.

95.08.23.11.29

Color LaserWriter 12/600 PS

Basics & Theory

1–16

 

 

 

Separation

This feature allows you to override the printer sensing system and force

Voltage

the separation discharge assembly on or off. Forcing-on is intended as

Designation

a fail-safe in low temperature/low humidity conditions where paper is

 

not properly separating from the transfer drum, and as a countermea-

 

sure in some image-offset problems. Forcing-off is a countermeasure

 

against toner displacement.

 

The separation voltage designation is nonpersistent. After restart, the

 

designation will revert to automatic. To designate the separation

 

voltage,

1Hold down the COLOR SELECT button and press the ENTER button three times. The yellow and black toner lights will flash to indicate that you are in the separation voltage designation mode.

2Using the plus or minus buttons, advance the density gauge to illuminate the LED corresponding to the desired designation. The density gauge will flash whenever the selected setting differs from the previously entered setting. Only LEDs 4, 5, and 6 on the density gauge correspond to available designations.

Separation Voltage Forced OFF

Automatic (Separation Voltage

Determined by Sensing System)

Separation Voltage Forced ON

3 Press the ENTER button to engage the setting.

95.08.23.11.29

Color LaserWriter 12/600 PS

Basics & Theory

1–17

 

 

 

Registration This feature allows you to adjust the placement of the image area on the Adjustments page. Registration adjustments require that the printer be placed into a

service adjustment mode. Consequently, these adjustments are not designed to be available to end users. Registration adjustments are persistent. To adjust the registration,

1Turn off the printer. Press and hold the TEST PRINT button and switch the printer back on. The normal startup sounds will not occur. Continue to hold the TEST PRINT button down for 25 seconds, at which time you will notice a slight slowing of the controller fan.

2Press the COLOR SELECT button once. The black toner light will flash to indicate that you are in the service adjustment mode. In addition, one of the other toner lights will illuminate steadily. Keep pressing the COLOR SELECT button until you come to the setting that you want.

M

 

C

 

Y

 

Bk

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Leading Edge

Registration Adjustment

Cassette Edge Registration Adjustment

Manual Feeding Tray Edge Registration Adjustment

3Using the plus or minus buttons, advance the density gauge to illuminate the LED corresponding to the desired adjustment value. For leading edge registration adjustment, each step in the gauge is equal to

.012 inch (.3 mm). For the other two adjustments, each step in the gauge is equal to .017 inch (.425 mm).

4Press the ENTER button to engage the setting.

Note: If you want to quickly return the printer to its factory defaults, press and hold both the plus and minus buttons for at least five seconds.

95.08.23.11.29

Color LaserWriter 12/600 PS

Basics & Theory

1–18

 

 

 

II.Basic Operation

Color LaserWriter 12/600 PS

Basics & Theory

1–19

 

 

 

Animation

Paper Path Animation

The icon to the left appears at key points throughout this manual. Clicking it launches a QuickTime animation called “CLW Paper Path.” This animation shows one complete print cycle through the Color LaserWriter 12/600 PS, starting at the point where the final sheet of paper is picked up from the cassette, and ending with the delivery of the paper at the top of the printer.

Frame Number

Play

Step Back

 

Step Forward

The animation is very detailed and moves very quickly. By using the “Step Back” and “Step Forward” buttons at the bottom right of the frame, you can step frame-by-frame through the animation. Whenever applicable, specific frame numbers that best illustrate a given topic are called out.

95.08.23.11.29

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