Upgrading RAM

There are two RAM SIMM slots on the LaserWriter 1 6 600 PS I O controller board, slot BA on the left and slot DC on the right. The printer comes with 8 MB of RAM installed in slot BA. You can increase the printer memory to a total of 32 MB by installing RAM SIMMs in one of the configurations shown on the next page. Caution The SIMMs are very susceptible to ESD damage. To prevent damage, wear a grounding wriststrap. Review the ESD precautions in Bulletins Safety. a No other configuration is...

Fax Card

Features When equipped with the fax card, the LaserWriter 16 600 PS Sends documents to any Group III-compatible fax machine or printer from an Apple Macintosh or IBM PC compatible computer. Receives and prints faxes at 200dpi from Group III-compatible fax machines. Receives and prints faxes at 600dpi from other printers equipped with PostScript fax capability. Send PostScript-language files to other printers that have PostScript fax capability so that documents print at the resolution of the...

Multipurpose Tray Assembly

Before you begin, remove the following 1 Push on the rounded recess at the top of the tray cover and open the multipurpose tray. 2 Bend the edge guide outward and release the left pin and then the right pin. Tilt the tray up into its normal closed position. Note The tray cover and extension guide should now be in an open position as shown in the photograph at the left. 3 Grasp the sides of the cover and bend the center with your thumbs until the cover pops loose from its pin hinges. Remove the...

Registration Adjustment

Before you begin, remove the following You must perform the registration adjustment procedure whenever you replace the DC controller board, paper pickup block, or the laser scanner assembly. The DC controller board calculates registration based on input from registration paper sensor PS602 (see Sensing System Theory in Basics) and adjustments made to varistor VR201 on the DC controller board. Optimum leading edge registration distance is 2 mm. Using a jeweler's screwdriver, reset VR201 on the...

Power Supply

Before you begin, remove the following 1 Note Three screws secure the power supply to the chassis one on the left side of the printer beneath the power inlet panel and two on the rear side. Pull off the power inlet panel that covers the main power switch and remove the three screws. 2 Note There is a receptacle on the rear face of the power supply. The receptacle mates with the high-voltage connector block and may cause slight resistance when you are pulling out the power supply. Remove...

Envelope Feeder Cable

Before you begin, remove the following 1 Remove the cabling from the entire length of its retaining channel in the right pickup block. Note If you are replacing the feeder cable without replacing the feeder cable mount, skip to step 7. 2 Note The opening guide is the rounded metallic plate with the green knob at its far end. The opening guide hinges around a ring connection at the knob end and an open grip connection at the near end. Swing the opening guide upward about 90 , free the grip...

Top Cover

Before you begin, open the multipurpose tray and remove the rear panel Note The cover liner comes off with the removal of the top cover. 1 Remove the two screws inside the fuser access door. Using a small flat-blade screwdriver, release the four flex tabs at the four locations indicated and separate the liner from the printer. 3 Remove the top cover and cover liner from the printer. When you reseat the top cover and cover liner, reach through and gently press the delivery surface until the...

Printer Diagnostic EPOST

Whereas the Power-On Self Test (POST) occurs during every printer startup, the Extended Power-On Self Test (EPOST) occurs only with intervention of the service technician. EPOST is a diagnostic built into the I O controller board that is designed to run when the printer is in a modified state of operation. To enable EPOST, turn off the printer, install a serial loopback connector into the I O controller serial port, and set the configuration switch to the up position. Turn the printer on. EPOST...

Transfer Block Assembly

Laserwriter 600

Before you begin, remove the following 1 For clearance purposes, loosen the nine silver-colored screws and the one upper black screw about 1 8 inch and shift the front wall outward. 2 Remove the screw facing out through the fuser door that secures the feeder guide to the chassis. 3 Pry under the toner-side edge of the assembly with a small flat-blade screwdriver and release the five tabs that secure the transfer block assembly to the chassis. 4 Note The underside of the transfer block assembly...

Wiring Diagram

The LaserWriter 16 600 PS wiring diagram can be found on the next page. The detail in this document is too small to read easily at 100 view. You should either zoom into the diagram using the zoom tool above, or print the diagram on a laser printer with a resolution of 300 dpi (600 dpi preferred). 4 J2 40 1 2 3 4 5 6 7 8 9 10 1112 1314 1516 171819 20 Cassette Pickup Roller Clutch Solenoid Cassette Pickup Roller Clutch Solenoid

Maintaining IO Connectivity

If you want to troubleshoot the printer while maintaining connectivity to a host computer, you must temporarily reposition the printer's I O controller board. In this reconfigured state, you will be able to print from a paper source other than the standard cassette, observe the behavior of LEDs during startup, or run the printer diagnostic, while still having the engine open for troubleshooting. To reconfigure the I O controller in this way, remove the rear panel, I O controller board, and I O...

Laser Scanner Assembly

Before you begin, remove the following Awarning Review LaserWriter Safety in Basics before working with the laser scanner assembly. Note The LaserWriter 1 6 600 PS laser scanner assembly is available only as an integral assembly. No subparts are available from Apple and no power adjustments are possible. 1 Remove the four cables from the cable clips and disconnect the cables at their connectors. Note There is no fiber-optic cable in the LaserWriter 16 600 PS. Beam detection circuitry runs...

Adding a Fax Card

There are two fax cards available for the LaserWriter 16 600 PS, one for USA and one international. Install the fax card in accordance with the instruction in the user guide. The fax card mates into connector J15 on the I O board. One screw connects the fax card to a sheet metal flange on the I O shield. The fax port aligns with a pinout opening in the I O shield. The domestic fax card has an on-board modem and an RJ-11 phone net port for direct connection into phone lines. The finished goods...

Configuration Page

Network address settings 1 Amount and allocation of RAM memory and readout of EEPROM integrity 2 HP LaserJet emulator version 4 Startup page setting on or off 5 LaserWriter serial number 6 Halftone screen settings 7 System administrator password 8 SCSI ID of printer and attached drives 10 Default paper tray and margin offsets 11 If possible, always print a configuration page before calling Apple Technical Assistance Center.

Test Configuration Pages

There are three special pages that an operational LaserWriter 16 600 PS can print. Each indicates information that can isolate problems and or identify the configuration of the printer. The printer generates a startup test page 2-3 minutes after you switch on the printer. Successful printing of this page indicates that the I O board is operational. Note The startup test page may not print due to software disabling see Printer Utilities in Basics . The printer generates a service test page when...

Ram Simm Specifications

Length 107.95 mm 0.20 mm 4.25 in. .008 Height 25.53 mm 1.005 in. maximum 4 MB SIMM 1 Mbit x 32 bit one 4 MB bank 80 ns or less 2 Mbit x 32 bit two 4 MB banks 80 ns or less Note 16 MB SIMMs must have a 2 KB row 11 bit x 11 bit refresh configuration. 16 MB SIMMs with a 4 KB row 10 bit x 12 bit refresh configuration are not compatible with this printer.

DC Controller Board

Before you begin, remove the following 1 Disconnect J103 from the power supply. 2 Remove the all cables except for the engine interface cable and power supply connector TB201. Note Do not attempt to remove connector TB201 from the DC controller board. Connector TB201 is hardwired to the board. 3 Release the two flex tabs and pull the board out of the printer. Replacement Note Set the bottom edge of the board into the two mounts and then snap the top into place. Make sure that the positioning...

Paper Sensors

Paper Sensors

Paper sensors consist of an actuator, a U-shaped photo interrupter, and circuitry. Sensors are tripped as the actuator swings against movement of paper and blocks the gap of the U. An actuator can be passive governed by gravity or spring-loaded. Note Sensor failure can be either mechanical or electrical. When troubleshooting sensors, first confirm that the arm or lever moves freely without snagging, that any springs are applying correct resistance, and that the actuator is not broken. Then...

Interrupting a Print Cycle

Interrupting a print cycle and inspecting the photosensitive drum can help isolate the cause of print quality problems. If the image on the surface of the drum exhibits the same problem as the printed page, the fault is before the drum, probably in the imaging system. If the image on the drum is OK, the fault is after the drum, probably in the fuser assembly, transfer block, or high-voltage power supply. To inspect the drum in this way, run a print and wait until the paper clears the...

Connector J Locator

Underground Cable Locator Flowchart

J743 connects the fuser assembly to the high-voltage connecting block. A measurement of continuity between pins 1 and 8 indicates that the heater bulb and thermoprotector are intact. A measurement of continuity between pins 6 and 7 indicates that the thermistor is intact. LaserWriter 16 600 PS Troubleshooting Flowchart Important As you proceed through the steps in a table, remember to retry the printer each time you change its physical state-for example, when you replace a module. If the...

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Is the sealing tape removed from the toner cartridge Have you recently installed a laser scanner unit and has this symptom existed since The laser shutter may have been installed incorrectly. The shutter should spring back and forth as you insert the toner cartridge. Does this symptom occur only with envelopes Instruct the customer to adjust margins in the software application. Run the Extended PowerOn Self Test. Does the test indicate a specific error Go to the appropriate troubleshooting...

Symptoms Associated with Iop Rom Ethernet lockups

In version 1.0 of the IOP ROM, reception of an illegally sized packet greater than 1518 bytes caused the IOP to stop responding to network traffic. Restarting the printer may temporarily resolve this problem. This problem was resolved in IOP v2.0 and later. Customers should upgrade their IOP ROM to v3.0. The following problems have been fixed with version 3.0 of The printer's EtherTalk stack stops responding during or after a broadcast storm i.e. the printer disappears from the EtherTalk...

Fuser Assembly

No preliminary steps are required before you begin this procedure. Note Refer to the following take-apart topics for further disassembly of the fuser assembly Note Unless noted otherwise, left and right are defined by viewing the printer through the fuser door opening. 2 Using needlenose pliers, squeeze the flex-tab end of the strap hinge and remove the hinge from its mount. 4 Note There is a receptacle left of center on the rear face of the fuser assembly. The receptacle mates with the...

Overall Exploded View

Laser Exploded Views

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Upper Delivery Roller Shaft

Before you begin, remove the following 1 Remove the E-ring on the right side of the shaft and slide off the bushing. 2 Push the delivery roller shaft to clear the left grip and drive belt and lift the shaft from the delivery roller assembly. four small delivery guide pins that hang freely on the upper shaft must point outward with the flow of paper .

Fuser Access Door

No preliminary steps are required before you begin this procedure. 2 Using needlenose pliers, squeeze the flex-tab end of the strap hinge and remove the hinge from its mount. Grasp the sides of the door and bend the center with your thumbs until the door pops loose from its pin hinges.

High Voltage Connector Block

Before you begin, remove the following 1 Remove the screw that secures the right cassettte guide to the fuser end of the printer. 2 Note The tab referenced in the following step is accessible from behind the rear wall of the chassis. Release the single flex tab with your finger and shimmy the cassette guide off the printer. 3 Disconnect J210 the orange cabling from the DC controller board. 4 Release the expansion posts behind the receptacle that is anchored into the chassis wall, detach the...

External hard drives

You must use an HDI-30 SCSI System cable and SCSI terminator to connect a hard drive to the printer. The terminator can be either black or gray. Each SCSI device connected to the printer must have a different number. Do Caution External hard drives must supply 5 volts DC to the SCSI bus to work properly. Check the documentation that came with the hard drive for information about SCSI voltage. The printer will not recognize any attached drive unless the drive is turned on before or at the same...

Engine

Electrophotography using single-component microfine toner Semiconductor laser and a rotating six-faced prism scanning mirror Dimensions Height 12.08 in. 307 mm Width 16.73 in. 425 mm Depth 16.89 in. 429 mm Clearance Required 50.4 x 24.25 x 19.75 high 1 282 x 61 6 x 501 mm Weight Printer with cassette 42.02 lb. 19.1 kg Operating Temperature 50-90.5 F 10-32.5 C Environment Humidity 20-80 relative humidity Power Consumption Approximately 0.79 kW at 71 F 20 C Sound Pressure Level Bystander Position...

High Voltage Power Supply

No preliminary steps are required before you begin this procedure. Note The high-voltage power supply receives power from the high-voltage connector block and transfers it into the toner cartridge through contacts TB401 to TB406. Remove the high-voltage power supply from its tray before returning the high- 2 Remove the two screws that secure the high-voltage power supply to the bottom chassis. 3 Note There are three hidden contacts and a pin connector that mate with the high-voltage connector...

IO Board

CPU AMD 29030 RISC running at 25 MHz Refer to Upgrading RAM in Upgrades for more information. ROM may be either soldered or in the form of SIMMs. If you are returning an I O controller board to Apple that uses ROM SIMMs, those SIMMs must accompany the board. Replacement I O controller boards that do not have soldered ROM will have separately-bagged ROM SIMMs that you will need to install onto the board. LocalTalk, Ethernet, and parallel connections Settings The LaserWriter 16 600 PS features...

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Laserwriter 600 Ethernet

J21 Connector for Internal Hard Drive- see Addiing Hard Drives in Upgradess Circuit Board Diagrams - 30 I O Controller Board VR201 see Registration Adjustment in Adjustments. PS702 Multipurpose Tray Paper-Present Sensor PS701 Multipurpose Tray Paper-End Sensor PS702 Multipurpose Tray Paper-Present Sensor PS701 Multipurpose Tray Paper-End Sensor

Previously used drives

The LaserWriter 16 600 PS will not recognize any disks that have been formatted for use with a different model of LaserWriter or Macintosh. If you attach such a drive to the printer, you must reinitialize the drive before you can use it and then reload any fonts from your computer. Note You must initialize hard drives with the Apple Printer Utility for Macintosh or the Font Downloader in the Printer Setup dialog box for Windows . If your computer communicates with the printer via DOS or a UNIX...