My HP750 plotter just displayed the message, "Switch Power Off; Check Cartridge Path" after the last print job. I see nothing blocking the printer cartridges and can't get the message to clear. Am I...
I've seen this error on the Designjet 750 plotters.
Basically the plotter puts out this error if the carriage assembley cannot move along the Y-Axis (back and forth)
The carriage moves along the Y-Axis driven by a motor with a metal gear, pushing and pulling a rubber belt.
Over time the interaction between the metal and rubber causes the teeth to wear off the belt and often times the worn rubber gets stuck in the teeth of the motor gear.
So, open the cover, and look behind/below the carriage itself and find the belt which runs the width of the printer. Run your fingers along the tooth side of the belt and check for degraded teeth, aslo examine the metal base below for any debris
If you find debris, this is your root cause of the error you are getting.
Unfortunately, changing the belts on these machines is quite a process; on average it takes me 3 hours to replace a belt (and I've done dozens of them)
It would be best to find an experienced tech since there can be some difficulties when replacing the belt (specifically proper belt alignment, and the removal of the side covers can be tricky as well.)
If you do not have any debris, and the belt is degraded, it could be that the motor which propels the carriage could be bad or something is obstructing the movement of the carriage head (the ink supply lines, the pen path, or media could be the issue).
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