Cleaning an Epson Stylus 740 printing
head (light version)
As usual, I cannot be responsible for any damage to
your machines when you will experiment the following
August 12 2004 update; another technique
So welcome, Epson printer owner! This page may help
you to solve your problem.
Like me, any Espon printer owner have to face once in the
printer's life some clogged printer heads...
-> Several solutions exist:
- software based cleaning process: rarely efficient in
case of deep problems, this process consumes a lot of
- changing the head for a new one: expensive and can
only be done by specialized technicians,
- manually cleaning the defect heads: the less
expensive and in most of the cases the most efficient
As far as the manual cleaning process is concerned, two
- filling the empty cartridges with isopropylic alcohol
and performing several printings to physically clean the
- disassembling the heads and manually clean them: my
favourite technique I will demonstrate you
First of all, will you please apologize me for the
photos' quality: at the time I wrote this note, I only had a
poor AGFA CL20 camera.
Let's go for 40 minutes of operation (including
- cruciform screwdriver
- large clear area for working
- little flat screwdriver
- isopropylic (or similar) alcohol
- soft duster pads ("kleenex" tissue or similar are
If one rule must be issued: IN ANY CIRCUMSTANCE, DO NOT
FORCE onto printer's parts!
Conventionnaly, I will use a big arrow to indicate the
part to be removed and I will use a small arrow to indicate
the screew or the pin which maintain the big part in place.
Diassemble the case: 4 cruciform screws
Two on rear...
...Two under the cover, in the front of the machine.
Reaching the axis driving the heads:
a) from the left side (sheet feeder facing you)
Remove the security pin which lock the big cogwheel.
Warning: behing the cogwheel, a spring.
Once the cogwheel removed, remove the screw (small arrow)
to detach the support axis. Mark the position of the screw
to be able to reassemble the support in the same position.
Axis is freed on the left. Now go on the other side!
b) from the right side (sheet feeder still facing
On the left, the head pressure regulation, kept in place
by a spring and fixed onto the axis support (on the right).
The latter is attached to the printer's chassis by a screw
(in my printer, an yellow mark in the plastic) and is
clamped on the plastic axis support (small piece low on the
Blue arrows point to the pieces extracted from the left
of the printer:
axis, spring, axis support, screw, metal pin.
In yellow: the dissambled lever (but still attached to
the support axis), the small yellow arrows point to the
spring and the screw.
Caution: under the plastic axis' support one can find a
Remove the axis and unlock the printer head.
Axis can be easily removed as it is no longer clamped on
the right of the printer.
Remember to push onto the small spring which keep the
belt in place.
Doing this, the head can be simultaneously unhooked on
the other side (big arrow) and the axis can be pushed out.
Once the axis removed, the head can be upturned to be
Same head head..but now clean! One can also:
- Clean (alcohol) the rubber rolls.
- Clean (alcohol) the axis and lubricate it with
adequate oil, like sewing machine oil.
To rebuilt the printer, follow the instructions above...
in reverse ordrer!
Just a small difficult step. When placing the big
cogwheel into place, this wheel must exactly draw into the
little wheel which face the big one: otherwise, no way to
put the metal pin in place to lock them.
Left: before cleaning, right: after.
If you wish to thank or forsten me...