Print With White Bands

White bands appear at a right angle to the paper path and characters are partially missing or very faint. Check the transfer charger wire for dirt, bends or kinks. Replace transfer charger detack saw assembly. Was the EP cartridge exposed to light Replace EP cartridge. Note that the EP cartridge deteriorates in a short period if exposed to direct sunlight. Do not expose it to indoor light for more than 5 minutes.

Removing The Controller Board

CAUTION Take precautions against static buildup when handling circuit boards. 1. Turn the printer power switch to off (0) and remove the AC plug from its power source. 2. Remove all cables from the printer's interface connectors. 3. Remove two screws from the wafer box. 4. Remove four screws from the interface bracket. 5. Slide the wafer box with attached controller board partially out of the printer base. 6. Disconnect the power and video cable plugs from the controller board. (Connectors J7...

Trademark Acknowledgements

HP Laserjet Series IIP is a trademark of Hewlett Packard, Inc. PostScript is a registered trademark of Adobe System Incorporated. Apple and LaserWriter are a registered trademarks of Apple Computer, Inc. Macintosh is a trademark licensed to Apple Computer, Inc. First Edition June 1993 FCC Regulations state that any unauthorized changes or modifications to the equipment not expressly approved by the manufacturer could void the user's authority to operate this equipment. This equipment has been...

Paper Feed Roller Assembly

Removal To remove the paper feed roller assembly from a feeder unit 2. Remove the lower chute assembly. 3. Lift the paper feed roller assembly out of the feeder unit. FIGURE 4-52. PAPER FEED ROLLER ASSEMBLY (FEEDER UNITS) FIGURE 4-52. PAPER FEED ROLLER ASSEMBLY (FEEDER UNITS) To install the paper feed roller assembly in a feeder unit Reverse the removal procedure. PAPER FEED SOLENOID (TRAYS 2 & 3) Removal To remove a paper feed solenoid from a feeder unit Remove the lower chute assembly....

RemovalTo remove the fuser bulb

Remove the EP cartridge and keep it in a safe plate. 3. Remove the screw with a gold flange from the right end of the roller cleaner cover, and remove it. 5. Remove the two screws with black flanges from the outer cover, and remove it. 6. Carefully pull outward on the metal clamp securing the fuser bulb. 7. Slide the fuser bulb out of the heat roller.

To install the fuser unit

Set the fuser unit down on the guides and align the inner sides. 2. Make sure the fuser is seated correctly. There should be no space between the fuser unit screws and the printer frame. CAUTION If the fuser unit is not perfectly seated inside of the guides, paper jam problems can occur. 3. Tighten the two captive screws on the fuser unit. Check to be sure the unit is secure. 4. Plug the three connectors from the fuser unit wires into the connectors under the fan. See Figure 4-21. 5. Install...

Remove the paper exit sensor

Remove the EP cartridge and keep it in a safe place. Remove the screw with a gold flange from the right end of the roller cleaner cover assembly, and remove it. Remove right and left screws with black flanges from the outer cover, and remove it. Remove the four screws with black flanges from the inner cover assembly and remove it. Remove the gold screw from the paper exit sensor to remove it.

Remove the fuser thermostat

Pic Fuser Thermostat

Remove the EP cartridge and keep it in a safe place. Remove a screw with a gold flange from the right side of roller cleaner cover assembly and remove it. Remove the right and left screws with black flanges from the outer cover, and remove it. Remove the four screws with black flanges from the inner cover assembly, and remove it. Remove the two gold screws from the fuser thermostat to remove it.

Table Localtalk Serial Connector Pin Assignments

TXD- Low true data line from the printer to user system. RXD- Low true data line from the user system to the printer. TXD High true data line from the printer to the user system. RXD High true data line from the user system to the printer. The SCSI connector on the back of the printer lets you connect a hard disk drive to the printer. Many hard disk drives made for the Macintosh can be plugged into the printer. The recommended disk drives are self-contained units that connect to the printer...

Table Scsi Connector Pin Assignments

NOTE Signals with an asterisk are low active. NOTE Signals with an asterisk are low active. ACK Indicates an acknowledgement for a REQ ACK data transfer handshake. ACK is received as a response to the REQ signal. ATN Indicates an attention condition. BSY Indicates the SCSI bus is being used. C D Indicates Control or Data information is on the data bus. I O Controls the direction of data movement on the SCSI bus. True indicates input to the initiator. Also used to distinguish between selection...

RemovalTo remove the fuser temperature sensor

Xserve Cover Sensor

Remove the EP cartridge and keep it in a safe place. 3. Remove the screw with a gold flange from the right end of the roller cleaner cover assembly, and remove it. 5. Remove the right and left screws with black flanges from the outer cover, and remove it. 7. Remove four screws with black flanges from the inner cover, and remove it. 8. Remove the gold screw from the temperature sensor, and remove it.

Exposure Process

Except for the semiconductor, diode-type laser, the printer uses the same Xerographic process as conventional copiers. When the printer receives a print start signal from the I O Controller, the laser diode starts emitting light. The laser beam from the laser diode is collimated by a cylinder lens before being transmitted to the polygon mirror. The six-sided polygon mirror is driven by the scanner motor that rotates at a constant speed RPM . Each rotation of the polygon mirror causes one scan...

Fuser Thermostat

PART NAMES AND FUNCTIONS CONTINUED TABLE 1-1. PART NAMES AND FUNCTIONS CONTINUED Displays the printer's operating status, error messages, and corrective actions. The keypad is used for setting printer operating parameters. Light Emitting Diodes LED used to erase any residual charge on the drum. Turns AC power supply ON and OFF. The switch is part of the LVPS. Determines that the EP cartridge is seated correctly. Detects the surface temperature of the heat roller and transmits a...

To remove the rear cover

Remove the manual feed tray or the multi media power feeder. Remove the top cover. Remove the front cover. Remove the left cover. Remove the right cover. Remove the remaining two screws with silver flanges that attaches the rear cover to the frame. 8. Pull the rear cover straight out and away from the frame. 8. Pull the rear cover straight out and away from the frame.

Lithium Battery Information Caution

Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer. Dispose of used batteries according to the manufacturer's instructions. A dead lithium battery is considered hazardous waste and has some potential for explosion if improperly handled. Mark the battery Dead. Place it in a zip-lock wrapper and the packaging used to ship the replacement battery, and return the dead battery to Apple, where it will be disposed of...

RemovalTo remove the exit roller assembly

Exit Roller

Remove the outer exit-chute assembly. 3. Remove the inner exit-chute. 4. Remove the fuser fan. See page 4-40 for instructions. 5. Remove the belt on the right end of the exit roller assembly. See the next procedure for instructions. 6. Remove the E-rings from each end of the roller shaft. 7. Slide the pulley and bearing off of the right end of the exit roller shaft. 8. Slide the exit roller shaft to the left and remove the exit roller assembly from the printer.

RemovalTo remove the take away roller assembly

Take Away Roller

Remove the multi media power feeder as required. 3. Remove the black screw with a hexagonal flange that secures the ground wire. 4. Remove the connector CN2 from the motor assembly, connector CN3 from the paper feed solenoid, and connector CN4 from the paper out sensor. 5. Remove the harness from the wire clamp on the bracket assembly. 6. Remove the four gold screws from the bracket assembly. 7. While pressing the JAM CLEAR button on the bottom of the bracket, move the bracket upward. 8....

RemovalTo remove the drive unit

Printer Controller Removal

Remove the electrical box cover. 7. Remove the control panel assembly. 8. Remove the following connectors see Plug Connector Locations at the end of this section P J61 on the Low Voltage Power Supply PCB P J1, P J4, P J7, P J8, P J9, and P J10 DC Controller 9. Remove the screw that secures the cables to the DC Controller connectors P J81, P J82, P J83, P J84, P J91, P J92, P J93, and P J94, and the green ground wire. 1 0. Remove the four screws with silver...

To remove the electrical box cover

Remove the top cover. Remove the front cover. Remove the left cover. Remove the fuser fan. Remove the seven screws with silver flanges from the electrical box cover. 7. Move the electrical box cover straight out and away from the printer. BEFORE REMOVING THE ELECTRICAL BOX COVER SCREWS, NOTE THE BEFORE REMOVING THE ELECTRICAL BOX COVER SCREWS, NOTE THE

Printing Process

Laser Printing Fusing Drum

DRUM CLEANING DETACK TRANSFER FEED DRUM CLEANING DETACK TRANSFER FEED The main charger places a negative charge on the drum. When an image signal is received, the laser emits light to the drum and erases the negative charges to form an electrostatic latent image. The magnetic roller is covered by a thin film of magnetic toner. The toner negatively charged is attracted to the latent image on the drum and forms a visible image on the drum. The transfer charger applies a positive charge to the...