Canon BJC-820 Service Manual page 68

BJC-8200
From
previous
page
1. Replace the relevant
ink tank(s)
2. Replace the BJ
cartridge
Faulty printing
still occur?
Yes
Check connectors
Yes
1. Replace the carriage
unit
2. Replace the logic
board
OK?
Yes
END
No
END
Are cables connected to carriage board and
logic board correctly?
No
Repair or replace
relevant parts
Carriage contact cable failure
Carriage ribbon cable failure
Carriage board failure
No
Replace the purge unit
4-17
Part 4: TROUBLESHOOTING