This is unlikely that the pump is not working.. I have 2 RP 3700s.. The screens are probably clogged.. with old ink.. or there could be a fit problem with the ink tube to the drum.. (no vacuum). With the drum in the machine and the ink in installed.. Take handle of a hammer and lightly (LIGHTLY!) push to ensure that there is no air pocket in the ink tube.. Carefull not to push too hard and squirt ink all over inside the machine. Also ink screens can be taken off and cleaned with varsol and re-installed.. Also as a final check.. make sure you are makeing a master.. look closely to see if you have a lazer burned image on your master.
Answers & Comments
This is unlikely that the pump is not working.. I have 2 RP 3700s.. The screens are probably clogged.. with old ink.. or there could be a fit problem with the ink tube to the drum.. (no vacuum). With the drum in the machine and the ink in installed.. Take handle of a hammer and lightly (LIGHTLY!) push to ensure that there is no air pocket in the ink tube.. Carefull not to push too hard and squirt ink all over inside the machine. Also ink screens can be taken off and cleaned with varsol and re-installed.. Also as a final check.. make sure you are makeing a master.. look closely to see if you have a lazer burned image on your master.