Введение

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.

This is a teardown of the Epson Stylus 820 Photo color printer.
  • 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.

Добавить комментарий

The ink cartridges are replaceable. That is a good sign. The ink cartridges are replaceable. That is a good sign.
  • The ink cartridges are replaceable. That is a good sign.

Добавить комментарий

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. 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.

Добавить комментарий

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.
  • 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.

Добавить комментарий

Now it is time to unlatch two more tabs. The case has started to separate. The case has started to separate.
  • Now it is time to unlatch two more tabs.

  • The case has started to separate.

Добавить комментарий

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

Добавить комментарий

The cover is finally off! 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.

Добавить комментарий

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!
  • 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!

Добавить комментарий

After removing 4 screws, the stepper motor comes out. After removing 4 screws, the stepper motor comes out.
  • After removing 4 screws, the stepper motor comes out.

Добавить комментарий

The stepper motor cable is routed through a series of plastic tabs that hold it down. 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.

Добавить комментарий

A closer look at the stepper motor. 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!

Can I know how i can run this motor?

이재헌 - Ответить

In order to access the paper tray, 3 screws must be removed. One in an obvious place. One in a less-obvious 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.

Добавить комментарий

The paper tray has been removed. This magnificent specimen was found deep inside the paper tray. 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.

Добавить комментарий

A close look at what is behind the paper tray.
  • 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.

Добавить комментарий

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.
  • 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.

Добавить комментарий

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

Добавить комментарий

The power supply is connected to the main board by 4 surprisingly thin wires. The power supply is connected to the main board by 4 surprisingly thin wires.
  • The power supply is connected to the main board by 4 surprisingly thin wires.

Добавить комментарий

The inside of the power supply.
  • 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 - Ответить

The logic board's shielding is held in place with 4 screws. 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.

Добавить комментарий

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. 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.

Добавить комментарий

The chips on the logic board.
  • 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

Добавить комментарий

The plastic clip that holds the dual ribbon cable in a folded position. The plastic clip that holds the dual ribbon cable in a folded position. The plastic clip that holds the dual ribbon cable in a folded position.
  • The plastic clip that holds the dual ribbon cable in a folded position.

Добавить комментарий

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

Добавить комментарий

The other side. The other side. The other side.
  • The other side.

Добавить комментарий

The rod can now be extracted from the printer. The rod can now be extracted from the printer.
  • The rod can now be extracted from the printer.

Добавить комментарий

Now that the rod has been removed, the print head can be unhooked from the drive belt. Now that the rod has been removed, the print head can be unhooked from the drive belt. Now that the rod has been removed, the print head can be unhooked from the drive belt.
  • Now that the rod has been removed, the print head can be unhooked from the drive belt.

Добавить комментарий

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

Добавить комментарий

An unusual metal bar in the paper feed path is held in by two screws. An unusual metal bar in the paper feed path is held in by two screws. An unusual metal bar in the paper feed path is held in by two screws.
  • An unusual metal bar in the paper feed path is held in by two screws.

Добавить комментарий

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 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 - Ответить

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. 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 - Ответить

To remove the metal midframe of the printer, three screws must be removed. To remove the metal midframe of the printer, three screws must be removed. To remove the metal midframe of the printer, three screws must be removed.
  • To remove the metal midframe of the printer, three screws must be removed.

yup those tube should be the waste ink tube

dennis97519 - Ответить

The midframe can now be lifted out of the printer.
  • The midframe can now be lifted out of the printer.

Добавить комментарий

After removing a gear, another metal rod can be removed. After removing a gear, another metal rod can be removed.
  • After removing a gear, another metal rod can be removed.

Добавить комментарий

After removing another screw, the second stepper motor can be removed. After removing another screw, the second stepper motor can be removed. After removing another screw, the second stepper motor can be removed.
  • After removing another screw, the second stepper motor can be removed.

Добавить комментарий

The tensioner wheel and drive belt can be removed by pushing it down out of the tensioner. The tensioner wheel and drive belt can be removed by pushing it down out of the tensioner.
  • The tensioner wheel and drive belt can be removed by pushing it down out of the tensioner.

Добавить комментарий

The gearbox is going to be the next thing to be removed... The gearbox is going to be the next thing to be removed...
  • 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 - Ответить

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

dennis97519 - Ответить

The gearbox drives the paper feed and the nozzle cleaning processes all from one motor. The gearbox drives the paper feed and the nozzle cleaning processes all from one motor. The gearbox drives the paper feed and the nozzle cleaning processes all from one motor.
  • The gearbox drives the paper feed and the nozzle cleaning processes all from one motor.

Добавить комментарий

A close look at the peristaltic pump used to move ink from the nozzle cleaner to the large absorbent pads. A close look at the peristaltic pump used to move ink from the nozzle cleaner to the large absorbent pads. A close look at the peristaltic pump used to move ink from the nozzle cleaner to the large absorbent pads.
  • A close look at the peristaltic pump used to move ink from the nozzle cleaner to the large absorbent pads.

Добавить комментарий

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

Добавить комментарий

Another rod is removed from the printer.
  • Another rod is removed from the printer.

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

Добавить комментарий

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

Добавить комментарий

The main stepper motor, the part most likely to fail, is easy to remove.
  • 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.

Добавить комментарий

Bonus Teardown Time! Time to see what is underneath the 'Do not remove' sticker located on the ink cartridge.
  • 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 - Ответить

jrw01

Member since: 22.08.2013

1 105 Репутация

Автор 23 руководств

Один комментарий

THANK YOU

WHILE I BUSTED UP CASE A BIT

FOUND STUFF IN PAPER FEED AND THOUGH IT LOOKS LIKE S+&T IT WORKS

ALSO YOUR TEARDOWNS ON OLD MAC LAPTOPS HELPED ME years ago when i got a ‘lot’ salvage and canibalised them for profit (not much but some) you folks are GGGRRRRRR8

mike - Ответить

Добавить комментарий

Просмотр статистики:

За 24 часа: 2

За 7 дней: 5

За 30 дней: 30

За всё время: 3,673