Problem with MP760 after shock

[vilrockerdefer]

Hello,

My wood desk unfortunately fell tonight on my MP760. I had just managed to find a very satisfying calibration, only by eye, and was beginning to truly enjoy it.

It was printing a borderless A4 picture, and stopped in the middle when it received the wood (with a CRT monitor on top of it).

I tried to print again, but so far, all printings have the same problem, which is clearly noticeable in this scan :

Here is the detail :

What is not noticeable is that
- even on the back of the print there are traces, but much less noticeable though
- the black traces seem to "engraved" in the paper : there are even wider "scratches" on top and on the sides of the ink lines, but transparent

I tried all cleanings methods allowed by the MP760 software several times with no luck. I tried cleaning the inside with a cloth and alcohol with no luck. I checked if the pump evacuates the ink and it does. I tried printing from both paper source : same result. What I didn't try is "roller cleaning" because my printer display is dead.

I noticed that there is a friction sound when the print head is on the left of the printer (when I face the printer). It is also on the left of the papers that I have these black lines.

What do you think, please ? Should I throw the printer away ? Any help welcome, as usual.
Fred

 

[ghwellsjr]

You might try taking the printer apart and looking for something that is out of place or damaged. Instructions are here.

Did the display quit working as a result of this accident?

 

[qwertydude]

It looks like it has something to do with the pizza wheels on the printer. The little spiked wheels that grab the paper near the front of the printer. I'd also remove the printhead and inspect and clean the bottom area as the impact may have caused some ink to leak.

 

[vilrockerdefer]

The display had quit the last time I had to disassemble because of the fog on the back of the scanner screen. When I assembled back, the display never restarted. I checked the display cable, many times tried to plug it in again, with no luck.

@qwertydude : if you mean some of these pizza wheels (on the axis inbetween the two yellow circles),

, well, they are not aligned with the black lines I have, so I suspect some other malfunction.

I just began to disassemble, will report here.

 

[vilrockerdefer]

Well I am glad to say that I have been able to correct the problem. But, as of now, only with a screwdriver stuck into the printer. Let me explain myself :

I you look at service manual page 1-25 section 3-3-5, "Carriage shaft clip location", you will see that you can adjust the height of the carriage shaft.

By manually levering it up a bit (then end of the carriage shaft) with a screwdriver, my problem disappears. The problem I have now is that, using the red screw that is supposed to allow such adjustment, I cannot set the shaft high enough to make the problem vanish.

To me, it means that the shock must have deformed the printer frame. Now I am unable to correct the problem without some sort of permanent hold that I will have to figure out.

Let me now what you think.

(I have had the nice suprise to have my display working again by disassembling/reassembling ! Thanks to ghwellsjr for the instructions).

 

[ghwellsjr]

Good to hear you got your display working. Was it a cable that came unplugged?

 

[vilrockerdefer]

I guess so, but I don't know.

Back to my main problem, I simply removed the sort of attach pad and somehow attached the clip to the other clip (the carriage clip ?) which is above.

Now it prints without the black traces ! But there is another problem : there is a lot of branding on the top half of the page, which suggests to me that maybe the carriage shaft has suffered from the shock and is not straight anymore.

Anyway, I decided to give up (for the second time) personal photo printing...

Thanks again.