Introduction

Teardown of an Epson Stylus Photo 820 Inkjet Printer.

This teardown is not a repair guide. To repair your Epson Stylus Photo 820, use our service manual.

Image 1/1: '''Caution:''' Along with being the most epic, this is also the messiest teardown on iFixit. If you decide to do this, make sure you do it on a surface that you will not care if it gets covered in ink.
  • This is a teardown of the Epson Stylus 820 Photo color printer.

  • Caution: Along with being the most epic, this is also the messiest teardown on iFixit. If you decide to do this, make sure you do it on a surface that you will not care if it gets covered in ink.

Add Comment

Image 1/2: Image 2/2:
  • The ink cartridges are replaceable. That is a good sign.

Add Comment

Image 1/3: After removing the screw, the three tabs on the back can be unhooked. Image 2/3: After removing the screw, the three tabs on the back can be unhooked. Image 3/3: After removing the screw, the three tabs on the back can be unhooked.
  • Only one screw on the outside. That looks like a good sign.

  • After removing the screw, the three tabs on the back can be unhooked.

Add Comment

Image 1/2: Answer: according to the existing iFixit guide, they allow access to the tabs holding the cover in place. Image 2/2: ''Opening this printer is a lot harder than it looks.''
  • What are these strange slots on the bottom of the printer?

  • Answer: according to the existing iFixit guide, they allow access to the tabs holding the cover in place.

  • Opening this printer is a lot harder than it looks.

Add Comment

Image 1/3: The case has started to separate. Image 2/3: The case has started to separate. Image 3/3: The case has started to separate.
  • Now it is time to unlatch two more tabs.

  • The case has started to separate.

Add Comment

Image 1/1:
  • It was necessary to pry this piece of plastic away from the USB port while removing the case.

Add Comment

Image 1/2: Not much more can be seen by taking off the cover. Image 2/2: Not much more can be seen by taking off the cover.
  • The cover is finally off!

  • Not much more can be seen by taking off the cover.

Add Comment

Image 1/2: The drive belt can be easily removed by pressing on a tensioner on the other side of the printer. +1 for reparability! Image 2/2: The drive belt can be easily removed by pressing on a tensioner on the other side of the printer. +1 for reparability!
  • Next step: the stepper motor.

  • The drive belt can be easily removed by pressing on a tensioner on the other side of the printer. +1 for reparability!

Add Comment

Image 1/2: Image 2/2:
  • After removing 4 screws, the stepper motor comes out.

Add Comment

Image 1/2: It eventually connects to the (hidden) logic board. Image 2/2: It eventually connects to the (hidden) logic board.
  • The stepper motor cable is routed through a series of plastic tabs that hold it down.

  • It eventually connects to the (hidden) logic board.

Add Comment

Image 1/2: ''If you know what voltage this motor runs at or its pinout, please leave a comment!'' Image 2/2: ''If you know what voltage this motor runs at or its pinout, please leave a comment!''
  • A closer look at the stepper motor.

  • If you know what voltage this motor runs at or its pinout, please leave a comment!

Add Comment

Image 1/3: One in an obvious place. Image 2/3: One in a less-obvious place. Image 3/3: And one hidden in a dark place.
  • In order to access the paper tray, 3 screws must be removed.

  • One in an obvious place.

  • One in a less-obvious place.

  • And one hidden in a dark place.

Add Comment

Image 1/3: This magnificent specimen was found deep inside the paper tray. Image 2/3: This magnificent specimen was found deep inside the paper tray. Image 3/3: This magnificent specimen was found deep inside the paper tray.
  • The paper tray has been removed.

  • This magnificent specimen was found deep inside the paper tray.

Add Comment

Image 1/1: ''While this padding at the bottom looks harmless, do not treat it that way. Skip the next step if you do not want to know what might be hiding inside your printer.''
  • A close look at what is behind the paper tray.

  • While this padding at the bottom looks harmless, do not treat it that way. Skip the next step if you do not want to know what might be hiding inside your printer.

Add Comment

Image 1/1: At least the mess wasn't as bad as [http://www.extremetech.com/computing/79524-beware-the-ink-jet-spittoon|this] or [http://www.dailymotion.com/video/x8pydk_your-printer-has-invisible-ink-it-s_tech|this].
  • The object at the bottom of the last photo was 5 layers of absorbent padding to contain all the ink that the printer has wasted while cleaning its nozzles, in this case almost 8 years of ink.

  • At least the mess wasn't as bad as this or this.

Add Comment

Image 1/2: Image 2/2:
  • The power supply is held in place by 3 screws, but it seems to be missing two on the front.

Add Comment

Image 1/2: Image 2/2:
  • The power supply is connected to the main board by 4 surprisingly thin wires.

Add Comment

Image 1/1: The large capacitor (circled in orange) can hold up to 400 volts, which will hurt if you touch it while plugged in.
  • The inside of the power supply.

  • The large capacitor (circled in orange) can hold up to 400 volts, which will hurt if you touch it while plugged in.

it will also hurt you if you didn't discharge it before touching it

dennis97519 - Reply

Image 1/2: Two cables remain connected to the logic board. Image 2/2: Two cables remain connected to the logic board.
  • The logic board's shielding is held in place with 4 screws.

  • Two cables remain connected to the logic board.

Add Comment

Image 1/3: The large dual ribbon cable for the printhead attaches to two connectors on the logic board, one on each side. Image 2/3: The large dual ribbon cable for the printhead attaches to two connectors on the logic board, one on each side. Image 3/3: The large dual ribbon cable for the printhead attaches to two connectors on the logic board, one on each side.
  • The heatsink is attached to the logic board by these screws.

  • The large dual ribbon cable for the printhead attaches to two connectors on the logic board, one on each side.

Add Comment

Image 1/1: A2037 and C5694 transistors
  • The chips on the logic board.

  • A2037 and C5694 transistors

  • A6615SED stepper motor driver

  • 219A254UN proprietary EPSON chip

  • IC41LV16256 256K x 16 bit dynamic RAM

  • M62510FP bus termination regulator

  • 29LV400TC 8 mBit CMOS flash memory

  • LVCZ161284A high speed IEEE 1284 transceiver

Add Comment

Image 1/3: Image 2/3: Image 3/3:
  • The plastic clip that holds the dual ribbon cable in a folded position.

Add Comment

Image 1/2: Image 2/2:
  • The main axle/rod/shaft/round metal thingy is held in by spring clips.

Add Comment

Image 1/3: Image 2/3: Image 3/3:
  • The other side.

Add Comment

Image 1/2: Image 2/2:
  • The rod can now be extracted from the printer.

Add Comment

Image 1/3: Image 2/3: Image 3/3:
  • Now that the rod has been removed, the print head can be unhooked from the drive belt.

Add Comment

Image 1/3: The six lines on the print head visible in the second and third pictures are actually rows of microscopic ink nozzles. Image 2/3: The six lines on the print head visible in the second and third pictures are actually rows of microscopic ink nozzles. Image 3/3: The six lines on the print head visible in the second and third pictures are actually rows of microscopic ink nozzles.
  • The print head

  • The six lines on the print head visible in the second and third pictures are actually rows of microscopic ink nozzles.

Add Comment

Image 1/3: Image 2/3: Image 3/3:
  • An unusual metal bar in the paper feed path is held in by two screws.

Add Comment

Image 1/2: ''Please comment if you know what this passive component does.'' Image 2/2: ''Please comment if you know what this passive component does.''
  • The metal strip contains many spiked wheels rotating on springs which allow them to be pushed out of the feed path.

  • Please comment if you know what this passive component does.

the spiked wheels seems to be called starwheels, but not sure what they are used for...

dennis97519 - Reply

Image 1/3: The assembly is spring loaded so the nozzles can be pushed into a pad to collect ink, which is then somehow transferred into the large absorbent ink pad. Image 2/3: The assembly is spring loaded so the nozzles can be pushed into a pad to collect ink, which is then somehow transferred into the large absorbent ink pad. Image 3/3: The assembly is spring loaded so the nozzles can be pushed into a pad to collect ink, which is then somehow transferred into the large absorbent ink pad.
  • This inky mess is the nozzle cleaner.

  • The assembly is spring loaded so the nozzles can be pushed into a pad to collect ink, which is then somehow transferred into the large absorbent ink pad.

there should be a waste ink pump and waste ink tube somewhere. The springed structure is for capping the print nozzle to slow down their drying out only, not to suck the ink.

dennis97519 - Reply

Image 1/3: Image 2/3: Image 3/3:
  • To remove the metal midframe of the printer, three screws must be removed.

yup those tube should be the waste ink tube

dennis97519 - Reply

Image 1/1:
  • The midframe can now be lifted out of the printer.

Add Comment

Image 1/2: Image 2/2:
  • After removing a gear, another metal rod can be removed.

Add Comment

Image 1/3: Image 2/3: Image 3/3:
  • After removing another screw, the second stepper motor can be removed.

Add Comment

Image 1/2: Image 2/2:
  • The tensioner wheel and drive belt can be removed by pushing it down out of the tensioner.

Add Comment

Image 1/2: Image 2/2:
  • The gearbox is going to be the next thing to be removed...

and the thing where the tube passed through is the pump. That is whats sucking out the ink. It seems to be driven by the main shaft also.

dennis97519 - Reply

there might be service manual available for those printers online somewhere, and technical details can sometimes be found.

dennis97519 - Reply

Image 1/3: Image 2/3: Image 3/3:
  • The gearbox drives the paper feed and the nozzle cleaning processes all from one motor.

Add Comment

Image 1/3: Image 2/3: Image 3/3:
  • A close look at the peristaltic pump used to move ink from the nozzle cleaner to the large absorbent pads.

Add Comment

Image 1/1:
  • This is what is left of the paper feed mechanism. The circuit board contains two microswitches to detect if there is paper present.

Add Comment

Image 1/1: This rod is coated in something that helps it grip onto the paper better.
  • Another rod is removed from the printer.

  • This rod is coated in something that helps it grip onto the paper better.

Add Comment

Image 1/1:
  • Lastly, here are the three spring-loaded rollers removed from the paper feed mechanism.

Add Comment

Image 1/1: The ink cartridges are easily replaceable.
  • The main stepper motor, the part most likely to fail, is easy to remove.

  • The ink cartridges are easily replaceable.

  • Many parts inside the printer have ink on them, making repairs messy.

  • The other stepper motor is very hard to access and requires disassembling most of the printer.

  • The midframe, which contains the gearbox and secondary stepper motor, is attached to the case with blobs of melted plastic that must be cut off to remove.

  • The case is very hard and tedious to open without breaking tabs.

Add Comment

Image 1/2: Time to see what is underneath the 'Do not remove' sticker located on the ink cartridge. Image 2/2: What is this network of labyrinthine passageways?
  • Bonus Teardown Time!

  • Time to see what is underneath the 'Do not remove' sticker located on the ink cartridge.

  • What is this network of labyrinthine passageways?

  • The answer is a capillary tunnel to reduce ink pressure. The lower row of holes leads into the cartridge itself, while the top row leads to the ink nozzles.

remove the top cover also :p saw it away

dennis97519 - Reply

jrw01

Member since: 08/22/2013

825 Reputation

23 Guides authored

0 Comments

Add Comment

View Statistics:

Past 24 Hours: 1

Past 7 Days: 8

Past 30 Days: 37

All Time: 3,380