Greetings,
Our Canon S750 purge unit makes a gear-slipping noise, is unable to move the (released) print head, and causes the purge-unit fault via alternating green/orange LED. After removing both top & bottom printer-case halves and powering the printer up, it still wasn't obvious why the purge unit wasn't moving. Manually rotating the large gear counter-clockwise caused the purge unit to complete the entire cycle, but is VERY STIFF. I can see why the motor is unable to move it. Thinking I might be able to see more with the purge unit removed, I unfastened it from the chassis. However if I then try to manually run the unit through one cycle, the plastic bottom of the "gear box" directly to the left of the motor pops loose (photo link below). Since that gearbox bottom cover wasn't fully seated when the purge unit was removed, that could very well allow enough looseness for the (apparently undamaged) gears to slip. Since that same snap-on bottom no longer has the chassis to push against, I suppose it could be clamped, but I don't want to abuse the plastic housing. Have any of you folks encountered this particular purge-unit troubleshooting obstacle? I'd really like to see the problem happening, to determine whether the purge unit can be salvaged.
As an aside, this purge unit appears to deliberately pump excess ink into the base of the printer via a couple short pieces of tubing at its bottom front. The whole bottom of the chassis has a coating of ink.
S. Lee
Our Canon S750 purge unit makes a gear-slipping noise, is unable to move the (released) print head, and causes the purge-unit fault via alternating green/orange LED. After removing both top & bottom printer-case halves and powering the printer up, it still wasn't obvious why the purge unit wasn't moving. Manually rotating the large gear counter-clockwise caused the purge unit to complete the entire cycle, but is VERY STIFF. I can see why the motor is unable to move it. Thinking I might be able to see more with the purge unit removed, I unfastened it from the chassis. However if I then try to manually run the unit through one cycle, the plastic bottom of the "gear box" directly to the left of the motor pops loose (photo link below). Since that gearbox bottom cover wasn't fully seated when the purge unit was removed, that could very well allow enough looseness for the (apparently undamaged) gears to slip. Since that same snap-on bottom no longer has the chassis to push against, I suppose it could be clamped, but I don't want to abuse the plastic housing. Have any of you folks encountered this particular purge-unit troubleshooting obstacle? I'd really like to see the problem happening, to determine whether the purge unit can be salvaged.
As an aside, this purge unit appears to deliberately pump excess ink into the base of the printer via a couple short pieces of tubing at its bottom front. The whole bottom of the chassis has a coating of ink.
S. Lee
