Taking apart an MP640 - any diagrams available

[Redbrickman]

Hi Guys.

My sick MP640 will not print Pigment black all of a sudden.

Not even a hint of PG BLK on the nozzle check print

I've determined that the head is not blocked by gently pressing it on a windex soaked towel and the ink flowed easily up and out of the inlet port.

Also changed the cart for a known good one to eliminate any ink starvation problem.

So I am considering a strip down of the printer to se if there is anything else obvious.

Has anyone got a basic exploded diagram of the machine, or has anyone taken one apart and can suggest a way to get the casing off?

TIA

 

[PeterBJ]

I hope this service manual for the MP640 will be helpful: http://www.bendata.de/Downloads/Canon/mp640_e.pdf

 

[Redbrickman]

Wow!

That's why this forum is the best on the net

Many thanks for the link.

 

[turbguy]

I would suspect a purge unit problem (hose came off, or purge unit/pump plugged). It's a big-dig to get to. Good luck!

Wayne