How to solve error B300 on Canon printers


Error code B300 concerns these Canon printers: MP7600, IX7000, MX7600...
Sometimes there is a message like "cancel printing, shut down the power and try again. If it doesn't work, call Canon service".

Alarm and power leds blink 8 times. Error B300 is a reactor error: a hardware error in supply of the ractor liquid


Solutions 1:
  • Power off the printer.
  • Disconnect the power cord from the electrical outlet.
  • Hold down the power button and Wait one minute.
  • Reconnect the power cord to the electrical outlet.
  • Switch on the printer.


Solution 2:
  • Power off the printer.
  • Disconnect the power cord from the electrical outlet
  • Wait for ten minutes.
  • Reconnect the power cord to the electrical outlet.
  • Switch on the printer.


Solution 3:
  • Clean the ink cartridges contacts.

Solution 4:
  • Open the printer and wait for the carriage to slide over.
  • Remove the ink cartridges.
  • Clean the print head with cotton swabs dipped in hot water.
  • Once finished, allow to dry the printhead.
  • Replace the cartridges



Solution 5:
  • Replace the valve unit

Solution 6:
  • Replace the sheet feed unit


Links:
  • QY6-0066: Printhead Canon for  IX7000, MX7600, MP7600
  • QM3-5358: Sheet feed unit IX7000
  • QM3-1948: Sheet feed unit MX7600
  • QM3-5339: RCT Pump Valve

3 comments:

TOM MCANA said...

One thing for sure with Canon printers, alternating orange/green flashes indicate a service code, as opposed to a consumer code.96

Unknown said...

Thank you... solution 1 worked for me. Appreciate the post.

George said...

Thank you... solution 1 worked for me. Appreciate the post.