Question about Brother MFC 420CN All-In-One InkJet Printer
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Posted on Jan 02, 2017
SOURCE: brother 420
error 51 =
The purge cam switch does not come ON or OFF even after the purge cam has been driven by the specified number of pulses.
Switching arm assembly not engaged correctly If the switching arm does not move smoothly, clean it.
Ink cartridge/purge switch harness not connected correctly
Correct the connection.
Purge cam switch broken Replace the purge cam switch.
Gear(s) on the maintenance unit broken Replace the maintenance unit.
Paper feed motor broken Replace the paper feed motor.
Main PCB defective. Replace the main PCB.
Cleaning of these print heads rarely if ever is successfull, they are electronic devices unlike other brands of printers
Posted on Dec 04, 2007
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