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The first laser printer teardown on iFixit.

Bu teardown bir tamir kılavuzu değildir. HP LaserJet 1160 or 1320 cihazınızı onarmak için, servis kılavuzumuzu kullanın.

  1. HP LaserJet 1320 Teardown, The Printer: adım 1, 3 resimden 1. HP LaserJet 1320 Teardown, The Printer: adım 1, 3 resimden 2. HP LaserJet 1320 Teardown, The Printer: adım 1, 3 resimden 3.
    • This teardown of the HP LaserJet 1320 is officially the first laser printer teardown on iFixit.

    • It took almost 7 hours to take apart this amazingly complex printer.

    • Spoiler alert: It's really nice to see something this repairable.

    • Also, check out the complete repair guide for this printer!

  2. HP LaserJet 1320 Teardown, Left Side Cover: adım 2, 3 resimden 1. HP LaserJet 1320 Teardown, Left Side Cover: adım 2, 3 resimden 2. HP LaserJet 1320 Teardown, Left Side Cover: adım 2, 3 resimden 3.
    • According to the service manual (there is a link in the documents section), the left cover of the printer can be opened without any tools by pulling on 2 tabs.

    • The service manual was right. For the record, this is actually easier than it sounds.

  3. HP LaserJet 1320 Teardown, Formatter Assembly: adım 3, 3 resimden 1. HP LaserJet 1320 Teardown, Formatter Assembly: adım 3, 3 resimden 2. HP LaserJet 1320 Teardown, Formatter Assembly: adım 3, 3 resimden 3.
    • Now on to the formatter.

    • Remove 2 screws on the I/O port cover.

    • Remove 6 screws on the formatter cover.

    • Disconnect 3 connectors to the laser assembly, the cartridge connector, and the control panel.

    • Disconnect 2 flat flexible cables to the laser assembly and the control board.

    • While the service manual says not to use a PoziDriv screwdriver, I found that using a normal Phillips screwdriver on the screws in this printer would require excess force and damage the screws, but a PoziDriv screwdriver removed the screws without causing any damage.

  4. HP LaserJet 1320 Teardown: adım 4, 2 resimden 1. HP LaserJet 1320 Teardown: adım 4, 2 resimden 2.
  5. HP LaserJet 1320 Teardown: adım 5, 1 resimden 1.
  6. HP LaserJet 1320 Teardown, Right Side Cover: adım 6, 3 resimden 1. HP LaserJet 1320 Teardown, Right Side Cover: adım 6, 3 resimden 2. HP LaserJet 1320 Teardown, Right Side Cover: adım 6, 3 resimden 3.
    • Removing the right cover is as easy as disengaging 3 tabs with the printer turned on its side.

  7. HP LaserJet 1320 Teardown, Back Cover: adım 7, 3 resimden 1. HP LaserJet 1320 Teardown, Back Cover: adım 7, 3 resimden 2. HP LaserJet 1320 Teardown, Back Cover: adım 7, 3 resimden 3.
    • The back cover can be removed by removing 4 screws on the back of the printer.

  8. HP LaserJet 1320 Teardown, Duplexer Tray: adım 8, 2 resimden 1. HP LaserJet 1320 Teardown, Duplexer Tray: adım 8, 2 resimden 2.
    • The duplexer tray can be removed by pulling outwards on the blue green blue-green tab, which releases the magnets that hold the tray in place.

  9. HP LaserJet 1320 Teardown, Top Cover: adım 9, 3 resimden 1. HP LaserJet 1320 Teardown, Top Cover: adım 9, 3 resimden 2. HP LaserJet 1320 Teardown, Top Cover: adım 9, 3 resimden 3.
    • Remove 2 screws on the back of the printer, one on the left side, and one on the front.

  10. HP LaserJet 1320 Teardown, Top Cover: adım 10, 1 resimden 1.
    • After disconnecting the control panel cable, the top cover can be removed.

  11. HP LaserJet 1320 Teardown, Control Panel: adım 11, 3 resimden 1. HP LaserJet 1320 Teardown, Control Panel: adım 11, 3 resimden 2. HP LaserJet 1320 Teardown, Control Panel: adım 11, 3 resimden 3.
    • The control panel and its circuit board can easily be removed with a metal spudger.

  12. HP LaserJet 1320 Teardown, Laser Assembly: adım 12, 3 resimden 1. HP LaserJet 1320 Teardown, Laser Assembly: adım 12, 3 resimden 2. HP LaserJet 1320 Teardown, Laser Assembly: adım 12, 3 resimden 3.
    • Remove one cable from the laser assembly.

    • Remove 4 screws from the laser assembly.

  13. HP LaserJet 1320 Teardown: adım 13, 3 resimden 1. HP LaserJet 1320 Teardown: adım 13, 3 resimden 2. HP LaserJet 1320 Teardown: adım 13, 3 resimden 3.
    • After removing the cover and the clips holding in the lenses, the inside of the laser assembly can be seen.

    • The chip on the motor board is an AN44010A, most likely some sort of brushless motor driver, although no datasheet could be found.

  14. HP LaserJet 1320 Teardown: adım 14, 2 resimden 1. HP LaserJet 1320 Teardown: adım 14, 2 resimden 2.
    • The board mounted on the side of the laser assembly contains the infrared laser diode and a photodiode to sense the beam direction. It has a chip marked as RH4-5444, for which no datasheet could be found.

  15. HP LaserJet 1320 Teardown, Fan: adım 15, 2 resimden 1. HP LaserJet 1320 Teardown, Fan: adım 15, 2 resimden 2.
    • Disconnect the fan cable from the control board on the back of the printer.

    • Remove the retaining clip from the fan.

    • Remove 2 screws holding in the fan.

    • While the fan can not be completely removed yet, this will make it easier to take apart other parts of the printer.

  16. HP LaserJet 1320 Teardown, Cartridge Connector: adım 16, 3 resimden 1. HP LaserJet 1320 Teardown, Cartridge Connector: adım 16, 3 resimden 2. HP LaserJet 1320 Teardown, Cartridge Connector: adım 16, 3 resimden 3.
    • Remove 1 screw from the top of the cartridge connector.

    • Remove 1 screw on the front of the cartridge connector.

    • The cartridge connector can be removed from the printer.

  17. HP LaserJet 1320 Teardown, Cable Clip: adım 17, 2 resimden 1. HP LaserJet 1320 Teardown, Cable Clip: adım 17, 2 resimden 2.
    • The cable clip for the laser assembly cable can be removed from the chassis.

  18. HP LaserJet 1320 Teardown, Duplexer PCB: adım 18, 2 resimden 1. HP LaserJet 1320 Teardown, Duplexer PCB: adım 18, 2 resimden 2.
    • Disconnect the duplexer cable from the control board.

    • Disconnect the duplexer solenoid cable from the duplexer PCB.

    • Remove one screw from the PCB and remove the PCB from the printer.

    • This tiny board contains 2 NPN transistors marked C2120 and C1815, which are used to drive the duplexer solenoid.

  19. HP LaserJet 1320 Teardown, Duplexer Gears: adım 19, 3 resimden 1. HP LaserJet 1320 Teardown, Duplexer Gears: adım 19, 3 resimden 2. HP LaserJet 1320 Teardown, Duplexer Gears: adım 19, 3 resimden 3.
    • Remove 3 screws on the duplexer gear assembly.

    • The duplexer gearbox can now be removed.

    • Remove one screw holding down the duplexer solenoid.

    • This appears to be a standard 24V open-frame solenoid, although no markings were found on it.

  20. HP LaserJet 1320 Teardown, Safety Interlock: adım 20, 3 resimden 1. HP LaserJet 1320 Teardown, Safety Interlock: adım 20, 3 resimden 2. HP LaserJet 1320 Teardown, Safety Interlock: adım 20, 3 resimden 3.
    • Remove 3 screws to remove the safety interlock assembly.

    • Disconnect 2 spade connectors from the microswitch.

    • The safety interlock prevents the lasers or high-voltage power supply from being turned on when the cartridge door is open.

  21. HP LaserJet 1320 Teardown, Fan Cable: adım 21, 3 resimden 1. HP LaserJet 1320 Teardown, Fan Cable: adım 21, 3 resimden 2. HP LaserJet 1320 Teardown, Fan Cable: adım 21, 3 resimden 3.
    • The fan cable can now be derouted from the cable guide and the fan can be removed.

  22. HP LaserJet 1320 Teardown: adım 22, 1 resimden 1.
    • The fan is a standard 24V brushless fan with a speed sensor manufactured by Nidec.

  23. HP LaserJet 1320 Teardown, Main Gear Assembly: adım 23, 3 resimden 1. HP LaserJet 1320 Teardown, Main Gear Assembly: adım 23, 3 resimden 2. HP LaserJet 1320 Teardown, Main Gear Assembly: adım 23, 3 resimden 3.
    • Disconnect 2 cables from the control board.

    • Remove the gear from the fuser shaft.

    • Deroute the remaining cables in the cable guide.

  24. HP LaserJet 1320 Teardown, Main Gear Assembly: adım 24, 3 resimden 1. HP LaserJet 1320 Teardown, Main Gear Assembly: adım 24, 3 resimden 2. HP LaserJet 1320 Teardown, Main Gear Assembly: adım 24, 3 resimden 3.
    • Remove 4 screws to remove the main gear assembly.

    • Remove 1 screw to remove the third solenoid.

  25. HP LaserJet 1320 Teardown, Cartridge Door: adım 25, 2 resimden 1. HP LaserJet 1320 Teardown, Cartridge Door: adım 25, 2 resimden 2.
    • The cartridge door can be removed by removing 2 screws on the front of the printer.

  26. HP LaserJet 1320 Teardown, Pickup Roller: adım 26, 3 resimden 1. HP LaserJet 1320 Teardown, Pickup Roller: adım 26, 3 resimden 2. HP LaserJet 1320 Teardown, Pickup Roller: adım 26, 3 resimden 3.
    • The pickup roller can now be removed by rotating the white tabs upwards and pulling them out.

  27. HP LaserJet 1320 Teardown, Registration Assembly: adım 27, 3 resimden 1. HP LaserJet 1320 Teardown, Registration Assembly: adım 27, 3 resimden 2. HP LaserJet 1320 Teardown, Registration Assembly: adım 27, 3 resimden 3.
    • Remove 2 screws to remove the paper feed bar.

    • Remove 2 (hidden) screws to remove the registration assembly.

  28. HP LaserJet 1320 Teardown, Fuser Gears: adım 28, 2 resimden 1. HP LaserJet 1320 Teardown, Fuser Gears: adım 28, 2 resimden 2.
    • Remove one gear on the output shaft of the fuser.

  29. HP LaserJet 1320 Teardown, Tray Connector: adım 29, 3 resimden 1. HP LaserJet 1320 Teardown, Tray Connector: adım 29, 3 resimden 2. HP LaserJet 1320 Teardown, Tray Connector: adım 29, 3 resimden 3.
    • Disconnect the cable to the tray connector and route it through the hole in the chassis.

    • You are now halfway through the teardown.

  30. HP LaserJet 1320 Teardown, Fuser Cables: adım 30, 3 resimden 1. HP LaserJet 1320 Teardown, Fuser Cables: adım 30, 3 resimden 2. HP LaserJet 1320 Teardown, Fuser Cables: adım 30, 3 resimden 3.
    • Disconnect 2 cables from the control board and remove them from the cable guide.

  31. HP LaserJet 1320 Teardown, Fuser Cables: adım 31, 2 resimden 1. HP LaserJet 1320 Teardown, Fuser Cables: adım 31, 2 resimden 2.
    • Remove the cable guide from the chassis.

  32. HP LaserJet 1320 Teardown, Fuser Cables: adım 32, 3 resimden 1. HP LaserJet 1320 Teardown, Fuser Cables: adım 32, 3 resimden 2. HP LaserJet 1320 Teardown, Fuser Cables: adım 32, 3 resimden 3.
    • Remove the cable guide on the other side of the chassis.

    • Disconnect 2 connectors from the control board.

  33. HP LaserJet 1320 Teardown, Fuser Cables: adım 33, 2 resimden 1. HP LaserJet 1320 Teardown, Fuser Cables: adım 33, 2 resimden 2.
    • Disconnect the high voltage wire from the fuser.

  34. HP LaserJet 1320 Teardown, Fuser Cables: adım 34, 3 resimden 1. HP LaserJet 1320 Teardown, Fuser Cables: adım 34, 3 resimden 2. HP LaserJet 1320 Teardown, Fuser Cables: adım 34, 3 resimden 3.
    • Deroute the tray connector cable through the cable guide.

    • Disconnect the main motor cable.

  35. HP LaserJet 1320 Teardown, Fuser: adım 35, 2 resimden 1. HP LaserJet 1320 Teardown, Fuser: adım 35, 2 resimden 2.
    • Remove 3 screws from the right side of the printer.

    • Remove 3 screws from the left side of the printer.

  36. HP LaserJet 1320 Teardown: adım 36, 1 resimden 1.
    • The fuser can now be removed from the printer.

  37. HP LaserJet 1320 Teardown: adım 37, 3 resimden 1. HP LaserJet 1320 Teardown: adım 37, 3 resimden 2. HP LaserJet 1320 Teardown: adım 37, 3 resimden 3.
    • Remove one screw on the front of the fuser.

    • Remove one screw on the top of the fuser.

    • The paper output assembly can now be removed.

  38. HP LaserJet 1320 Teardown: adım 38, 2 resimden 1. HP LaserJet 1320 Teardown: adım 38, 2 resimden 2.
    • Remove one spring and one screw from each side of the fuser.

  39. HP LaserJet 1320 Teardown: adım 39, 2 resimden 1. HP LaserJet 1320 Teardown: adım 39, 2 resimden 2.
    • Remove the large springs at each side of the fuser by pushing in on the plastic inserts.

    • The springs will fly out violently if you do not hold them with pliers.

    • Remove one screw on the fuser.

  40. HP LaserJet 1320 Teardown: adım 40, 2 resimden 1. HP LaserJet 1320 Teardown: adım 40, 2 resimden 2.
    • Remove the metal piece held down by the spring on each side of the fuser.

  41. HP LaserJet 1320 Teardown: adım 41, 1 resimden 1.
    • The fuser roller can be removed from the printer.

    • The white wires on the left connect to a temperature sensor.

    • The large connector on the right connects to the heating element and a thermal fuse.

  42. HP LaserJet 1320 Teardown: adım 42, 3 resimden 1. HP LaserJet 1320 Teardown: adım 42, 3 resimden 2. HP LaserJet 1320 Teardown: adım 42, 3 resimden 3.
    • Disconnect the snap-on connector from the right side of the fuser roller.

    • The heating element can be removed from its channel in the roller.

    • The heating element is a 576-watt thick film ceramic heater.

  43. HP LaserJet 1320 Teardown: adım 43, 3 resimden 1. HP LaserJet 1320 Teardown: adım 43, 3 resimden 2. HP LaserJet 1320 Teardown: adım 43, 3 resimden 3.
    • Remove the plastic clip from both sides of the roller.

    • The fusing film can be slid off of the roller without the clips in the way.

  44. HP LaserJet 1320 Teardown: adım 44, 3 resimden 1. HP LaserJet 1320 Teardown: adım 44, 3 resimden 2. HP LaserJet 1320 Teardown: adım 44, 3 resimden 3.
    • After removing the metal cover, the temperature sensor (red) and the thermal fuse (orange) can be removed.

    • The wires on both of these components have very thick silicone insulation to protect from heat.

  45. HP LaserJet 1320 Teardown: adım 45, 2 resimden 1. HP LaserJet 1320 Teardown: adım 45, 2 resimden 2.
    • After removing the plastic clip, the soft foam pressure roller can be removed.

    • The metal rod in the roller allows the roller to be negatively charged, which prevents toner from sticking to the fusing film. Each end of the rod is coated in a conductive black liquid which helps it make contact with the high-voltage connector.

  46. HP LaserJet 1320 Teardown: adım 46, 3 resimden 1. HP LaserJet 1320 Teardown: adım 46, 3 resimden 2. HP LaserJet 1320 Teardown: adım 46, 3 resimden 3.
    • Remove 2 screws to remove the metal bar from the fuser.

    • After removing one screw, this small circuit board can be removed.

    • The board contains a beam interrupt sensor, which contains an infrared LED pointing at an infrared phototransistor. When an object enters the slot and breaks the beam, the phototransistor detects it as a drop in infrared light.

  47. HP LaserJet 1320 Teardown, Midframe: adım 47, 3 resimden 1. HP LaserJet 1320 Teardown, Midframe: adım 47, 3 resimden 2. HP LaserJet 1320 Teardown, Midframe: adım 47, 3 resimden 3.
    • Remove 4 screws on each side of the printer to remove the metal midframe piece that holds the chassis together.

    • The massive control board can now be seen.

  48. HP LaserJet 1320 Teardown, Feed Plate: adım 48, 2 resimden 1. HP LaserJet 1320 Teardown, Feed Plate: adım 48, 2 resimden 2.
    • Remove the metal feed plate from the paper feed mechanism.

  49. HP LaserJet 1320 Teardown, Control Board Cables: adım 49, 2 resimden 1. HP LaserJet 1320 Teardown, Control Board Cables: adım 49, 2 resimden 2.
    • Remove the tray connector and motor cables from the cable guide.

    • The high voltage corona wire used to apply a charge to the paper is visible in the right of these pictures (the spiked metal strip attached to the paper feed assembly)

  50. HP LaserJet 1320 Teardown, Control Board: adım 50, 3 resimden 1. HP LaserJet 1320 Teardown, Control Board: adım 50, 3 resimden 2. HP LaserJet 1320 Teardown, Control Board: adım 50, 3 resimden 3.
    • Remove one screw holding down the tray connector cable guide and then remove the cable guide.

    • Remove one screw on the printer chassis.

  51. HP LaserJet 1320 Teardown, Control Board: adım 51, 3 resimden 1. HP LaserJet 1320 Teardown, Control Board: adım 51, 3 resimden 2. HP LaserJet 1320 Teardown, Control Board: adım 51, 3 resimden 3.
    • Remove 2 screws from the left side of the chassis.

    • Push the safety interlock and formatter cables through the hole in the chassis.

  52. HP LaserJet 1320 Teardown, Control Board: adım 52, 3 resimden 1. HP LaserJet 1320 Teardown, Control Board: adım 52, 3 resimden 2. HP LaserJet 1320 Teardown, Control Board: adım 52, 3 resimden 3.
    • Bend the chassis to allow the control board to come loose, and disconnect the 2 cables to the paper feed assembly to remove the control board.

  53. HP LaserJet 1320 Teardown, Control Board: adım 53, 1 resimden 1.
    • Remove 4 screws on the control board to remove it from the metal plate.

  54. HP LaserJet 1320 Teardown: adım 54, 1 resimden 1.
  55. HP LaserJet 1320 Teardown: adım 55, 1 resimden 1.
    • Chips on the back of the board:

    • STMicroelectronics 324 E9SU518 - Possibly an LM324 Quad Op Amp?

    • STMicroelectronics 339 E9W2513 - Possibly an LM339 Quad Comparator?

    • Unidentified Texas Instruments chip with the part number sanded off.

    • A2714 Power MOSFET

    • Large QFP chip with the part number sanded off and a red and a blue mark on top.

    • Interestingly, all the chips were covered in a clear coating that made it hard to read the part numbers.

    • It appears that whoever designed this board was trying to prevent reverse engineering by making it hard to read the part numbers on the chips.

  56. HP LaserJet 1320 Teardown, Main Motor: adım 56, 2 resimden 1. HP LaserJet 1320 Teardown, Main Motor: adım 56, 2 resimden 2.
    • The main motor can be removed after unclipping the cable guide and removing 3 screws.

  57. HP LaserJet 1320 Teardown: adım 57, 2 resimden 1. HP LaserJet 1320 Teardown: adım 57, 2 resimden 2.
    • The motor is a Nidec RK2-0419, which appears to be appears to be a fairly powerful "outrunner" style brushless motor rated for 1.3A at 24V. The rotor (the round metal part) is about 3 inches in diameter and the entire motor weighs about 15 ounces.

    • This motor might be a special motor designed for use in this printer, as it and many other components have a number with the format RK2-0xxx on them.

    • The single chip on the motor is a BD6761FS Brushless Motor Driver.

    • At this point, all that is left of the printer is the metal chassis and the paper feed assembly, a large chunk of plastic containing 2 more beam interrupt sensors.

  58. HP LaserJet 1320 Teardown: adım 58, 1 resimden 1.
    • This printer receives a perfect repairability score of 10/10.

    • No adhesives, thermoplastic staking, spot welding, or rivets are used.

    • Service manuals for this and most HP printers are easy to find and free.

    • Replacement parts are easy to find.

    • Printer is designed to be repaired.

Ekli Belgeler

jdp23

Üyelik tarihi: 22-08-2013

1.275 İtibar

23 adet Kılavuz yazıldı

5 Comments

Looks like someone got a much longer teardown already :)

Monroe KA Teardown

masterX244 - Yanıt

Excellent. I needed to see the polygon mirror of the LSU. It proved it’s too thin for my DIY project so you save me $12 for buying such unit from China

net_xplorer - Yanıt

Hi Sir.

Sir, im facing both sides paper jam problem in hp 1320n printer.

Actually when the paper goes in the printer for printing the second side, at that time it blocks.

Kindly guide me.

Thanking you

abbas khan - Yanıt

The first thing I would do is strip it down to the level of the “duplex tray” as shown above, and inspect that, clean it and clean all the rollers with isopropyl alcohol. See if that helps!

Chris Kear -

Thanks for this teardown. It saved me hours resurrecting a printer I received as a gift. I’m impressed by the build quality of this printer. It’s like a brick outhouse, heaps of steel, and everything modular, with servicing in mind. Should last forever, since I can always fix it, thanks to you!!

Chris Kear - Yanıt

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