Apple 12-600PS, 12 660PS Service manual

Color LaserWriter 12/600 PS and 12/660 PS Service Technical Documentation

Steve Rancourt 5/95

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About Printing

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Always use these numbers when printing

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 Setup Changes

The Color LaserWriter 12/660 PS requires two extra steps 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 alle viate oil o v erﬂow 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 3–3

3 Place 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.

1 Open 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 3–4

2 Open the fuser assembly and remove the oil absorption sheet

from the inside of the fuser assembly.

I/O Controller Board Changes

Driver Software

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

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 3–5

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 R OM 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 exhibiting one of the problems described below. Install a replacement 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 R OM, afﬁx the labels that are provided in the kit as described in the instructions that accompany the ROM upgrade kit.

Feature added in ROM v2.0

System bugs ﬁxes in ROM v1.2

Caution:

of the ROM also appeared in version 1.2.

All but one of the bug ﬁxes contained in version 2.0

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.

• Plug and play support for Windows 95 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 error at address 0x132460 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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Color LaserWriter 12/660 PS 3–6

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 w as used,

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Color LaserWriter 12/660 PS 3–7

the default protocol for the parallel port (TBCP) was changed to Normal and not returned back to TBCP, regardless of conﬁguration 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 ﬁxes in ROM v1.2

• NetWare polling 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 3–8

Installation Reimbursement Program

Beginning October 21, 1996, Authorized Apple Resellers and institutions are entitled to receive a $150 reimb ursement 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 be informed

A letter will be included with the printer informing customers 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.

Installation procedures

If everything is prepared, the service technician should be able to complete the setup and installation in about 45 minutes.

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

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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

Speed

Multiplatform Support

Connectivity Automatic

Trafﬁc Control

Fonts

Energy Savings

Hard Disk Option

The printer has a resolution of 600x600 dots per inch, with color PhotoGrade.

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.

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

The printer offers LocalTalk, Ethernet, and parallel connections. Without any user intervention, the printer can accept jobs simulta-

neously from AppleTalk, TCP/IP, and NetWare networks and from the parallel port.

The printer supports both TrueType and PostScript fonts. The printer has 39 built-in PostScript fonts.

The printer can automatically lower its power consumption when it’s not being used.

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

Laser

Controller

Canon HX LBP print 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)

Semiconductor laser GaAlAs

• Wavelength: 780 nm

• Output power: 1 mW 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

True 600 dpi

• 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 a vailable 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) 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

Life Expectancies

• Zapf Chancery MediumItalic

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

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

Printing Materials

Transparencies

Paper Sizes and Capacity

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.

Toner Safety

Ozone Safety

Laser Safety Label

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.

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.

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Color LaserWriter 12/600 PS Basics & Theory 1–11

Status Panel

Outline

Movie

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).

Access Lights Maintenance LightsToner Lights

Waste

Toner

Fuser

Assembly

Ready/In-Use

Light

Oil Photo-

conductor

Alert Light

Paper-Out

Light

Paper Jam

Light

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

= Flashing

Status Panel Lights

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

Description

Warming Up /Processing

Printer Ready

Low Magenta

Low Cyan

Low Yellow

Low Black

Low Fuser Assembly

Low Fuser Oil

Printer

Stops

500 pages later

50 pages later

Access

Lights

Photoconductor Warning

No Magenta Cartridge

No Cyan Cartridge

No Yellow Cartridge

No Black Cartridge

Toner Disposal Box Full

No Fuser Assembly

No Fuser Oil

No Photoconductor Cartridge

Door Open

(See "POST Code Matrix" in Chapter 2)

Yes

2 3

Access Lights

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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 Lights

Density Gauge

TEST PRINT

•

Important

M C Y Bk

COLOR

SELECT

DEFAULT ENTER

TEST

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

: 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

Note

button: Engages the currently selected value.

: 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.

5 Plus/minus (+/-) buttons: Advance the density gauge setting. 6 Toner Lights: An illuminated toner light indicates the color that is

being adjusted.

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Color LaserWriter 12/600 PS Basics & Theory 1–14

Density Adjustments

This feature is offered for customers who have multiple Color LaserWriter 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,

1 Press the

COLOR SELECT

button as many times as necessary until the

desired toner light illuminates.

Selected Color

M C Y Bk

COLOR

SELECT

DEFAULT ENTER

TEST

2 Press 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.

3 Repeat steps 1 and 2 if you want to adjust other colors. 4 Press the

Note

: If you want to quickly return the printer to its factory defaults,

ENTER

button to engage the settings.

press and hold both the plus and minus buttons for at least ﬁve seconds.

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Color LaserWriter 12/600 PS Basics & Theory 1–15

Test Page Pattern Selection

This feature allows you to select one of six test page patterns based upon which one would best conﬁrm a print quality issue.

Test pattern selection is nonpersistent. After restart, the test page reverts to the vertical line pattern. To select a pattern,

1 Hold 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

COLOR

SELECT

DEFAULT ENTER

TEST

2 Using the plus or minus buttons, advance the density gauge to illumi-

nate 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.

Usage Tips

Grid

3 Press the

Vertical

ENTER

Lines

GradationHorizontal

Solid

White

button to engage the setting. If you make no further

Solid

Colors

adjustments, the panel will exit from the test pattern selection mode in 30 seconds.

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.

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Color LaserWriter 12/600 PS Basics & Theory 1–16

Separation Voltage Designation

This feature allows you to override the printer sensing system and force the separation discharge assembly on or off. Forcing-on is intended as a fail-safe in low temperature/low humidity conditions where paper is not properly separating from the transfer drum, and as a countermeasure 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,

1 Hold 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.

2 Using the plus or minus buttons, advance the density gauge to illumi-

nate 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.

3 Press the

Separation Voltage Forced OFF Automatic (Separation Voltage

Determined by Sensing System) Separation Voltage Forced ON

ENTER button to engage the setting.

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Color LaserWriter 12/600 PS Basics & Theory 1–17

Registration Adjustments

This feature allows you to adjust the placement of the image area on the 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,

1 Turn 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.

2 Press 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

3 Using the plus or minus buttons, advance the density gauge to illumi-

nate 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).

4 Press 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.

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Color LaserWriter 12/600 PS Basics & Theory 1–18

II. Basic Operation

Color LaserWriter 12/600 PS Basics & Theory 1–19

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.”

Animation

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

Step BackPlay 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.

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+ 346 hidden pages

Apple 12-600PS, 12 660PS Service manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Color LaserWriter

Overview

Packaging and Setup Changes

I/O Controller Board Changes

Driver Software

Upgrade Path

Feature added in ROM v2.0

Installation Reimbursement Program

How customers will be informed

Installation procedures

Chapter Contents

Features

Safety Information

Status Panel