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.
TestConfiguration 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 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...
Apple Printer Utility for Macintosh Computers
The Apple Printer Utility for Macintosh computers works only with the LaserWriter 16 600 PS. You use this utility to set parameters that reside on the printer's I O controller board. You can use this utility to perform many functions, some of which are listed below. - Initializing SCSI hard drives - Setting default printer resolution - Setting default paper-handling options - Setting default print density - Turning off the startup test page - Setting communication protocols Note The LaserWriter...
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 1
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...
Thermosensor
Before you begin, remove the following Note The thermosensor monitors the temperature of the fuser bulb and relays the temperature back to the DC controller board. 1 Remove the screw that connects the thermosensor to the upper fuser frame and lift off the thermosensor.
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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
DC Controller Board 661-0094 Power Supply 661-0097 110 V 661-0098 220 V Transfer Block Assembly 922-0267 Fan Controller Board 922-0948 Right Corner Panel 922-0940 Cable Printer Interface 922-0139 Pickup Controller Board 922-0952 661-0123 Pickup Controller Board 922-0208 Picku pSnnoorBaard 922-0953 PikUppBlcc k Motor 076-0478 Drlee GaarsKIt 076-0674 Picku pBlcck Piece Parts Sitn 922-0289 SnnBorBolSerAnsembly 922-0276 SeftPicku pBlcc kFreme
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 .
Upper Fuser Frame
Before you begin, remove the following Note In the following steps, only the spring and the catch on the near side are shown in the drawing. 2 Release the catches at each end of the upper frame and lift the frame up and off the fuser assembly.
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.
HighVoltage 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...
Thermoprotector
Before you begin, remove the following Note The fuser thermoprotector prevents overheating of the fuser bulb. Caution When the thermoprotector has blown, replacing it does not necessarily solve the problem. You must investigate root causes of the overheating. 1 Remove the two screws that secure the cables to the thermoprotector contacts. 2 Press the flex tab that is visible just under the right cover and pop out the thermoprotector assembly.
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...
HighVoltage 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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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...