SOURCE: Riso Rz 220
Remove the master that is on the drum. Then check the master roll remove it cut about 18 inches off then re install master roll. hit the reset, then print bottons.
SOURCE: Error Code -534 on my Riso RZ 390. Drum is stuck
D04-534 means incorrect ink cartridge set. This could be caused either
a) it IS the incorrect ink cartridge, or b) the RF tag that is struck to
the end of the ink bottle is damaged. Try a new ink bottle.
Make
sure to use RISO ink designed and made specific for an RZ230.
SOURCE: how to solve erow code
Hi
You need to replace motherboard of your printer
the cost of it is to high
you better replace your printer
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