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 12/600 PS
Color LaserWriter 12/660 PS
Color LaserWriter 12/660 PS
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Color LaserWriter 12/660 PS |
3–2 |
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Overview |
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The Color LaserWriter 12/660 PS is an enhanced version of the |
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original Color LaserWriter 12/600 PS. The 12/660 engine and |
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plastics are identical to the original in every respect, and all |
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finished goods and service part numbers apply equally to both |
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printers. The sole differences between the two versions are in |
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the packaging and setup, the ROM and RAM on the I/O |
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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 |
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absorption sheets from the fuser assembly. |
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Note: The orange flag that identifies the shipping screw has |
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also been enlarged in the new version of the printer. |
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The leveling procedure helps to alleviate oil overflow problems |
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within the fuser assembly. The level and shim kit that comes |
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with the 12/660 PS is also available separately as P/N 076-0622 |
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for those who would to perform the procedure on the original |
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version of the printer. After removing the packing tape from |
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the outside of the printer, performing the leveling procedure |
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below before proceeding any further. |
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1 Remove the spirit level and the round black rubber shims from |
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their package. Snap the spirit level into its base. |
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2 Open the printer’s top access cover and place the spirit level on |
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top of the fuser to level the printer, first from front-to-back, then |
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from side-to-side. |
Spirit Level
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Color LaserWriter 12/660 PS |
3–3 |
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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 |
3–4 |
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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 |
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the board remain the same. |
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Note: Version 2.0 of ROM contains fixes for variety of system |
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and networking bugs that have been reported since the release |
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of the original printer. (I/O controllers with 2.0 ROM will also |
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output new startup and demo pages). If you want to upgrade an |
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existing printer, see “Upgrade Path” later in this chapter. |
Driver Software |
The new version of the Color LaserWriter printer does not |
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require a driver upgrade. However, the printer name has |
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changed in ROM. Consequently, with older drivers you must |
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manually select the “LaserWriter Color 12/600 PS” PPD when |
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setting up the new printer in the Chooser. |
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Alternately, if copy the new “LaserWriter Color 12/660 PS” |
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PPD into the Printer Descriptions folder (path: System |
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Folder:Extensions folder), Chooser setup will be automatic. |
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This PPD can be found on the Service Source CD (path: |
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Service Manuals:Clips:CLW 12/660 PPD). |
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Color LaserWriter 12/660 PS |
3–5 |
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Upgrade Path |
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You can upgrade a Color LaserWriter 12/600 PS to a Color |
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LaserWriter 12/660 PS by installing version 2.0 ROMs onto the |
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customer’s I/O controller board. The version 2.0 ROM upgrade |
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kit is available as P/N 076-0621. The contains eight ROM ICs, |
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a user manual addendum, a software installation CD, and |
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upgrade labels. |
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Note: Install new ROM only if the customer’s printer is exhib- |
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iting one of the problems described below. Install a replace- |
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ment I/O controller board (P/N 661-0133) only if your |
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troubleshooting has found the board to be defective. All service |
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stock for the I/O controller board will include version 2.0 of |
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ROM. |
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After installing the new ROM, affix the labels that are provided |
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in the kit as described in the instructions that accompany the |
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ROM upgrade kit. |
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Caution: All but one of the bug fixes contained in version 2.0 |
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of the ROM also appeared in version 1.2. If your I/O |
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controller board has version 1.2 of ROM, do not upgrade |
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unless it is specifically for the Windows 95 feature described |
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immediately below. You can identify the ROM version by |
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inspecting the margin text on the startup page. |
Feature added in |
• |
Plug and play support for Windows 95 |
ROM v2.0 |
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Plug and play support means that the user can connect the |
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printer to the system, boot Windows 95, and automatically see |
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the printer name in the “New Hardware Found” dialog box |
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during the installation process. After installation is complete, |
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the Device ID string and related information will be returned |
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whenever the printer is queried for its device id. |
System bugs fixes |
• |
System error at address 0x132460 |
in ROM v1.2 |
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When printing a complex document to the Color LaserWriter |
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12/600 PS, a page is printed stating “printer restarted due to |
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system error at address 0x132460.” |
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• System error at address @0x33F844 |
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A bug in version 1.0 ROM caused certain complex Adobe Illus- |
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trator files to reset the printer and to print a page stating “printer |
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restarted due to system error at address @0x33F844. |
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• |
Image stitching problem |
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When an image has a very fine line running across its body and |
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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 |
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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,
96.11.13.15.58
Color LaserWriter 12/660 PS |
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the default protocol for the parallel port (TBCP) was changed |
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to Normal and not returned back to TBCP, regardless of config- |
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uration switch position. In this scenario text documents would |
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print, but documents with images (binary data) would not. The |
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printer’s ready light would flash for a while, stop, and then |
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nothing would print. |
Networking bugs |
• |
NetWare polling |
fixes in ROM v1.2 |
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If the printer was in NetWare PServer mode configuration, it |
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would likely stop polling its NetWare print queue after being |
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powered on for more than 24 hours. |
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Name lengths increased |
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The pserver and rprinter name length has been increased to 47 |
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characters maximum. |
96.11.13.15.58
Color LaserWriter 12/660 PS |
3–8 |
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Installation Reimbursement Program |
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Beginning October 21, 1996, Authorized Apple Resellers and |
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institutions are entitled to receive a $150 reimbursement on the |
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installation(s) of the Color Laserwriter 12/660 PS. |
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Customers who purchase the printer beginning October 21, |
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1996 are entitled to have the printer set up and installed in the |
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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 |
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perform the installation. |
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This letter also stipulates special tasks for the customer to |
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perform before a service technician arrives at their location. |
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These tasks include: |
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• Preparing a suitable location for the printer. |
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• Having someone available to help the service technician lift |
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the printer from the floor to the table or counter. |
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• Providing appropriate power, networking connections, and |
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cabling. |
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• Ensuring that a network administrator (or other knowledge- |
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able person) is available for consultation with the service |
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technician. |
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• Providing a computer that is configured with the appropriate |
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system software and is functioning on the network. |
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• Arranging for the storage and disposal of packing materials. |
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If everything is prepared, the service technician should be able |
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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 |
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considerations required when setting up and installing this |
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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
I General Information |
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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 |
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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 |
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Laser System ................................................................................................. |
1–32 |
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Scanner System ............................................................................................. |
1–38 |
IV |
Image Formation System |
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Outline ............................................................................................................ |
1–41 |
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Photoconductor Cartridge .............................................................................. |
1–43 |
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Toner Cartridge .............................................................................................. |
1–44 |
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Stages of Imaging .......................................................................................... |
1–47 |
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Stage 1: Electrostatic Latent Image Formation ........................................ |
1–48 |
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Stage 2: Developing ................................................................................. |
1–50 |
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Stage 3: Photosensitive Drum Cleaning .................................................. |
1–51 |
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Stage 4: Transfer ..................................................................................... |
1–53 |
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Stage 5: Transfer Drum Cleaning and Discharge .................................... |
1–57 |
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Stage 6: Fusing ........................................................................................ |
1–59 |
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High-Voltage Control ...................................................................................... |
1–60 |
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Photosensitive Drum Life Detection ............................................................... |
1–68 |
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Toner Carousel Control .................................................................................. |
1–71 |
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Toner Cartridge Installation ....................................................................... |
1–73 |
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Carousel Rotation ...................................................................................... |
1–75 |
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Toner Cartridge Stop.................................................................................. |
1–79 |
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Toner Cartridge Press ............................................................................... |
1–80 |
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Developing Cylinder Drive ........................................................................ |
1–81 |
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Toner Cartridge Separation ....................................................................... |
1–82 |
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Image Quality Stability Control ....................................................................... |
1–84 |
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Temperature/Humidity Sensing System .................................................... |
1–85 |
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Density Calibration System ....................................................................... |
1–86 |
95.08.23.11.28
Color LaserWriter 12/600 PS Basics & Theory 1–3
V Pickup/Feed System |
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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 |
95.08.23.11.28
Color LaserWriter 12/600 PS |
Basics & Theory |
1–4 |
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I.General Information
Color LaserWriter 12/600 PS Basics & Theory 1–5
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Features |
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Some of the main features of the Color LaserWriter 12/600 PS are as |
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follows: |
Print Quality |
The printer has a resolution of 600x600 dots per inch, with color Photo- |
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Grade. |
Speed |
The printer prints up to 12 pages per minute in black, cyan, magenta, or |
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yellow; 3 pages per minute in two or more colors; and 1 transparency |
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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 |
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parallel port. |
Fonts |
The printer supports both TrueType and PostScript fonts. The printer |
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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 |
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100 in the multipurpose tray) without changing paper. You can also add |
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a 250-sheet feeder. |
95.08.23.11.28
Color LaserWriter 12/600 PS Basics & Theory 1–6
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Specifications |
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Marking |
Canon HX LBP print engine |
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Engine |
• 3 ppm in color; 12 ppm in black, cyan, magenta, or yellow; 1 ppm |
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for transparencies |
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• 600x600 dpi with Color PhotoGrade |
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• Enhanced 600 dpi grayscale imaging (effective 200-line screen half- |
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tone, 122 gray levels) |
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Laser |
Semiconductor laser GaAlAs |
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• |
Wavelength: 780 nm |
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• Output power: 1 mW |
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Controller |
The specifications for the I/O controller board are as follows: |
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AMD Am29030 30-MHz microprocessor |
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• 8 MB of ROM (including 39 Type 1 fonts) |
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• 12 MB of RAM (16 MB on CLW 12/660); 8 MB soldered + 4 MB |
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(or 8 MB) SIMM |
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(expandable to 40 MB total) |
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• 128 K parameter SRAM |
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• SCSI interface for internal/external hard disk(s) |
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LocalTalk interface |
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• High-speed parallel interface (IEEE P1284 ECP, bidirectional) |
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• Ethernet interface with three protocols: EtherTalk, Novell NetWare |
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IPX (PSERVER or RPRINTER), and TCP/IP (BSD lpd) |
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• External Ethernet transceivers available for thin coaxial, twisted pair |
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(10Base-T), and thick coaxial (IEEE 802.3 AUI) |
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• Two-position communication configuration switch |
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• All ports/protocols simultaneously active |
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• Color-rendering acceleration |
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Data compression/decompression system |
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• Adobe PostScript Level 2 (version 2014) |
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True 600 dpi |
The Color LaserWriter 12/600 PS is a true 600 dpi printer because |
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every aspect of its architecture is designed to a 600 dpi specification. In |
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addition, its 8-bit per pixel capability can assign levels of color or gray |
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to each pixel, thereby further enhancing print quality. |
96.09.11.09.27
Color LaserWriter 12/600 PS |
Basics & Theory |
1–7 |
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Printer Fonts |
The following fonts are resident in the printer ROM: |
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• AvantGarde Book, AvantGarde BookOblique, AvantGarde Demi, |
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AvantGarde DemiOblique |
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• Bookman Demi, Bookman DemiItalic, Bookman Light, Bookman |
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LightItalic |
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• Courier, Courier Bold, Courier BoldOblique, Courier Oblique |
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• Helvetica, Helvetica Bold, Helvetica BoldOblique, Helvetica |
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Narrow, Helvetica Narrow Bold, Helvetica Narrow BoldOblique, |
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Helvetica Narrow Oblique, Helvetica Oblique |
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• Helvetica Condensed, Helvetica Condensed Bold, Helvetica |
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Condensed BoldOblique, Helvetica Condensed Oblique |
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• NewCentury Schoolbook Bold, NewCentury Schoolbook Bold- |
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Italic, NewCentury Schoolbook Italic, NewCentury Schoolbook |
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Roman |
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• Palatino Bold, Palatino BoldItalic, Palatino Italic, Palatino Roman |
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Symbol |
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• Times Bold, Times BoldItalic, Times Italic, Times Roman |
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Zapf Chancery MediumItalic |
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Zapf Dingbats |
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Minimum life expectancy for the printer is 5 years or 300,000 pages in |
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Life |
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Expectancies |
black and white or 150,000 color pages, with no monthly page limit. |
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Recommended maintenance interval is 60,000 pages due to wear on |
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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
95.08.23.11.28
Color LaserWriter 12/600 PS |
Basics & Theory |
1–8 |
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Speed |
Prints 12 pages per minute in monochrome; 3 pages per minute |
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maximum in color; and 1 page per minute for transparencies. Actual |
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speed depends on the images printed and paper size. |
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Printing |
Uses 16to 28-pound laser-quality bond (60 to 90 g/m2). Most textured |
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Materials |
and colored stock is accepted but discouraged, as it will adversely |
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affect color print quality. |
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The paper used should not scorch, melt, transfer material, or release |
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hazardous emissions when heated to 200° C (392° F) for 0.1 seconds. |
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Transparencies |
Use only Apple Color LaserWriter 12/600 PS Transparencies A4 or |
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Letter. |
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Paper Sizes |
Supports U.S. letter and A4 in the standard paper cassette. The paper |
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and Capacity |
cassette holds 250 sheets of 20-pound (75 g/m2) paper. The multipur- |
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pose tray can hold up to 100 sheets of standard U.S. letter paper, and |
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other paper sizes up to U.S. legal. Optional 250-sheet universal |
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cassettes are available that support letter, A4, B5, and U.S. legal paper |
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sizes. Cassettes are compatible with both the printer and the optional |
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Suggested |
sheet feeder. |
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Apple has tested the following papers and found them to be acceptable. |
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Paper Brands |
• Aussydat-lay (A4, France) 100 g/m2 |
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• Boise Cascade Laser, 20 and 24 pound |
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• Classic Crest, 24 pound |
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• Hammermill Laser Print, 24 pound |
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• Legacy Laser Paper, 24 pound |
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• Nekoosa Laser 1000, 24 pound |
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• Neusiedler (A4, Austria) 100 g/m2 |
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• Xerox 4024 (LTR and A4), 20, 24, and 28 pound |
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• Nekoosa Laser 1000, 24 pound |
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Note: Recycled paper is not recommended. It tends to produce more |
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paper dust, degrading image quality and necessitating more frequent |
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replacement of the fuser assembly. |
95.08.23.11.28
Color LaserWriter 12/600 PS |
Basics & Theory |
1–9 |
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Dimensions |
Height: 18 in. (46 cm) |
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Width: 21 in. (54 cm) |
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Depth: 23 in. (58 cm) |
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Weight |
Approximately 110 lb. (50 kg) for the printer body only |
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Environmental |
During printer operation: Temperature 50° to 86° F (10° to 30° C) and |
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Conditions |
humidity 20 to 80 percent RH noncondensing (for optimum print |
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quality, operate at 35 to 70 percent RH) |
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In storage (both toner cartridges and printer): Temperature –4° to 104° |
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F (–20° to 40° C) and humidity 10 to 95 percent RH noncondensing |
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Acoustic |
Standby, less than 45 dB |
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Output |
Printing, less than 55 dB |
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Wait Times |
• Either 120 or 240 V, 3.5 minutes maximum |
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• Either 100 or 220 V, 4.5 minutes maximum |
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Voltage |
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100 to 120 V (50/60 Hz) or 220 to 240 V (50 Hz), voltage tolerance |
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Requirements |
plus or minus 10% |
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Power |
Energy-saving mode |
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Consumption |
• Approximately 42 W (meets EPA Energy Star) |
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Standby average |
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• 100/120 V, approximately 215 W |
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• 220/240 V, approximately 238 W |
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Operating average |
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• 100/120 V, approximately 535 W |
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• 220/240 V, approximately 524 W |
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Maximum power consumption |
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• 100/120 V, approximately 1.1 KW |
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• 220/240 V, approximately 1.0 KW |
95.08.23.11.28
Color LaserWriter 12/600 PS |
Basics & Theory |
1–10 |
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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 |
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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).
Toner Lights |
Access Lights |
Maintenance Lights |
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Waste |
Fuser |
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Toner |
Assembly |
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Bk |
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Oil |
Photo- |
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conductor |
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Ready/In-Use |
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Paper Jam |
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Light |
Alert |
Paper-Out |
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Light |
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Light |
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95.08.23.11.28
Color LaserWriter 12/600 PS |
Basics & Theory |
1–12 |
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= Flashing
Status Panel Lights
These are the possible arrays that customers can see during normal printer operation.
! |
Description |
Printer |
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Stops |
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Warming Up /Processing
Printer Ready
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Bk
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Bk
Access
Lights
Low Magenta |
No |
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Low Cyan |
No |
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Low Yellow |
No |
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Low Black |
No |
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Low Fuser Assembly |
500 pages later |
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Low Fuser Oil |
50 pages later |
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Photoconductor Warning |
No |
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No Magenta Cartridge |
Yes |
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No Cyan Cartridge |
Yes |
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No Yellow Cartridge |
Yes |
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No Black Cartridge |
Yes |
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Toner Disposal Box Full |
Yes |
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No Fuser Assembly |
Yes |
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No Fuser Oil |
Yes |
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No Photoconductor Cartridge |
Yes |
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Door Open |
Yes |
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(See "POST Code Matrix" in Chapter 2) |
Yes |
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Access Lights |
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95.08.23.11.29
Color LaserWriter 12/600 PS |
Basics & Theory |
1–13 |
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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.
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Density |
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TEST |
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Gauge |
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COLOR |
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DEFAULT |
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ENTER |
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SELECT |
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•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 |
|
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|
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 |
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printer to match the output of another. |
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Important: The range of settings is limited. Use this feature only if |
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you have prior experience in four-color density adjustments. |
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The printer needs to be switched on and in a ready state to make density |
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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 |
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TEST |
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COLOR |
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DEFAULT |
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ENTER |
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SELECT |
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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 |
|
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|
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 |
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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
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TEST |
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COLOR |
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DEFAULT |
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ENTER |
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SELECT |
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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.
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Grid |
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Vertical |
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Horizontal |
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Gradation |
Solid |
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Solid |
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Lines |
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Lines |
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White |
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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 |
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example, color registration problems are revealed best by the grid |
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pattern, while dirty rollers are revealed by printing a solid white page. |
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Note: By measuring the distance between repeating print defects, you |
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can isolate the problem to a specific roller within the printer. See |
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“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 |
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not properly separating from the transfer drum, and as a countermea- |
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sure in some image-offset problems. Forcing-off is a countermeasure |
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against toner displacement. |
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The separation voltage designation is nonpersistent. After restart, the |
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designation will revert to automatic. To designate the separation |
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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 |
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Y |
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Bk |
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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 |
|
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|
II.Basic Operation
Color LaserWriter 12/600 PS |
Basics & Theory |
1–19 |
|
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|
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 |
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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