Author Topic: Inkjet printing Epson L200 power boards and main board  (Read 12796 times)

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Offline Gakex

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Inkjet printing Epson L200 power boards and main board
« on: December 31, 2012, 05:55:50 PM »
Hi I have the Epson L200 all in one printer and seems that now does not work, one day suddenly just didn't wanted to turn on, everything appears to bee fine it didn't smells burned.

in the power supply

input 120v ac
output 41v dc

I wanted the schematics to find out the measures, well here the picture:

thank you


Offline amyk

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Re: Inkjet printing Epson L200 power boards and main board
« Reply #1 on: December 31, 2012, 06:19:57 PM »
"That's it?"

Amazing how integrated the electronics have become. The PCB in the older versions of the Epson printers were a lot larger and had many more ICs. A larger picture of the boards would help.

If you Google you can easily find a service manual but it's not more than "disassembly instructions"; the older manuals did have complete schematics.

The 41V is for driving the printhead piezos.
There should be another rail on the PSU that's logic-level (probably 3.3V now, it was 5V in the older models.)

I see 3 wires, my guess is ground, 42V, and 3.3/5V.

Plug in the PSU and check its output. Be careful as parts on it will be mains live.

Offline SeanB

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Re: Inkjet printing Epson L200 power boards and main board
« Reply #2 on: January 01, 2013, 12:15:32 AM »
One ram cuse ithip, one eeprom, a big asic with the rest of the logic, a pair of head drivers and a full bridge to drive a stepper, a half bridge for the paper feed, a driver for a solenoid and a few other bits and you have it all. 3 wires to the psu are 0V, 41v and power control, the 3v3 regulator is normally on the mainboard via a small SO8 switcher on the back of the board. The power control drops the main rails to about 10v during standby to reduce power consumption.

Offline G7PSK

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Re: Inkjet printing Epson L200 power boards and main board
« Reply #3 on: January 01, 2013, 05:19:15 AM »
Most likely there is nothing wrong with it other than being Epson They turn themselves off after a set period of time with some models anyway, there is a program written by a Russian that resets them. My DX4000 stopped working a short while ago due to the way it dumps ink every time its turned on or off and at the start of each print job the foam in the bottom becomes saturated and there is a sensor for this, I pulled the foam out and washed it after drying it out I put it back in blew the drain tube for the parking bay out and the machine works again.http://www.eevblog.com/forum/Smileys/default/icon_smile_thumbsup.gif

Offline SeanB

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Re: Inkjet printing Epson L200 power boards and main board
« Reply #4 on: January 01, 2013, 05:29:06 AM »
Yes, inkjets where more than 90% of the ink ends up in the pad at the bottom. I prefer a laser where at least you can get refills, and it lasts longer and does not dry up in the head.

Offline Gakex

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Re: Inkjet printing Epson L200 power boards and main board
« Reply #5 on: January 01, 2013, 01:37:38 PM »
Thank you for the coments.

I found the service manual earlier and as amyk says, here  it's not more than "disassembly instructions",  it help me just to take it apart and unmount the main board, however i can't check it because im new in the electronics and don't have the values of the schematics. the only that I can measure was the out put of the PSU  it get me

 :bullshit:
42volts
GND
41volts

everithing seems to be good at least phisicaly, check it out:











Hope that you guys can tell me if there is a trick that helps or a common problem in this model of printes that may help and casually I have the epson stylus c63 PSU and the MB here and take some pictures:
from left to right Epson Stylus Inkjet printer and the Epson L200 All in one printer.



I wis you an exelent new year and blessings for you and yours, thank you.
Regards from México.


Epson L100/L200 manual service http://www.4shared.com/office/t4PfzCXZ/l200_l100_series_a.html
« Last Edit: January 01, 2013, 01:40:59 PM by Gakex »

Offline Mechatrommer

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Re: Inkjet printing Epson L200 power boards and main board
« Reply #6 on: January 01, 2013, 04:38:52 PM »
Most likely there is nothing wrong with it other than being Epson They turn themselves off after a set period of time with some models anyway, there is a program written by a Russian that resets them.
from this link, L200 should give the warning and wont directly OFF... http://www.zimbio.com/Inkjet+Printer+Reviews/articles/S-G5OeqHY6E/Resetter+Adjustment+Program+Epson+L200 btw i have TX121 similar panel as OP posted.

Offline Psi

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Re: Inkjet printing Epson L200 power boards and main board
« Reply #7 on: January 01, 2013, 05:32:27 PM »
Does this left cap look bulging in real life?
It has a slight roundness in the picture but it might just be distortion from a wide angle lens.


Greek letter 'Psi' (not Pounds per Square Inch)

Offline PhynixViking

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Re: Inkjet printing Epson L200 power boards and main board
« Reply #8 on: January 01, 2013, 07:33:36 PM »
I see a RAM chip!!! LOL
Caps are good? If not, ram chip maybe!
I find on computers and computer equipment its like almost always Caps or RAM, lol
(it may have a "safty" that if ram is bad, it wont turn on.)
Also, like Psi said, that Left cap on the PSU looks odd.
Check UNDER caps too (just look under to see if its "flat" or bulging there. I've had MANY caps that blew from the bottom and not the "vent" on the top.
Anyway, good luck! ^_^
Check out my youtube! ^_^
http://www.youtube.com/user/PhynixViking

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Offline Gakex

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Re: Inkjet printing Epson L200 power boards and main board
« Reply #9 on: January 01, 2013, 10:20:23 PM »
the caps has good loking
it seems that i have to put together and send it back. thank you people.

Offline kripton2035

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Re: Inkjet printing Epson L200 power boards and main board
« Reply #10 on: January 01, 2013, 10:43:40 PM »
I would check the output capacitor (the black one) with an esr meter
or at least try to change it with a similar to test
even if it's not bulky, it can fail.

Offline Gakex

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Re: Inkjet printing Epson L200 power boards and main board
« Reply #11 on: January 12, 2013, 06:25:24 PM »
Guess what people...

I tink i can fixed it was a diode the "D1" in the main board i'll upload pictures ASAP....

the diode is in short, it is a sk16 smd diode and I change it for an other (M7 smd diode) now the power led blinks  but i can see if is fixed at all because I have it in parts.

Offline Skimask

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Re: Inkjet printing Epson L200 power boards and main board
« Reply #12 on: January 12, 2013, 07:34:18 PM »
Ya, that big cap next to the coil looks bulged (repeating the overstated already I know).
If it was me, I'd replace it while you've got it out.
I didn't take it apart.
I turned it on.

The only stupid question is, well, most of them...

Save a fuse...Blow an electrician.

Offline amyk

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Re: Inkjet printing Epson L200 power boards and main board
« Reply #13 on: January 12, 2013, 10:29:28 PM »
Guess what people...

I tink i can fixed it was a diode the "D1" in the main board i'll upload pictures ASAP....

the diode is in short, it is a sk16 smd diode and I change it for an other (M7 smd diode) now the power led blinks  but i can see if is fixed at all because I have it in parts.
You replaced a Schottky diode with a regular silicon diode... seeing as it looks like it's part of the buck converter that may not be a good idea.

Offline Gakex

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Re: Inkjet printing Epson L200 power boards and main board
« Reply #14 on: January 13, 2013, 08:03:13 AM »
Quote
You replaced a Schottky diode with a regular silicon diode... seeing as it looks like it's part of the buck converter that may not be a good idea.

Thanks for the info, I'll try to buy a replacement for that diode...
however now the printer turns on and also work the scaner and the printer, the only bug is that it doesn't print noting just looks like. well I go to the electronic store...


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