The tubes. The R 300 printer has been out of use for a while and as a result the ink in the supply lines has flowed back to the pots. This has happened before and several 'Powerful Head Clean' cycles in the SSC utility has got them going again. This time however it is being most reluctant to flow. Any other ideas any one.
The way to get the ink flow in to remove the breather cap on the end of a tank and fit over it one of the refill syringes with the plunder pulled up. A quick puff and all start slowing again. But Beware sometime you can get a flooding from one or more nozzle so a few test prints would be advisable and tissue hand to mop up the pads.
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