Canon BJC-820 Service Manual page 66

BJC-8200
2. Faulty
Printing: No
<Measure>
Visually check BJ
cartridge
OK?
Yes
Cleaning operation
Print the nozzle check
pattern
Do print problems
appear?
Yes
1. Replace the relevant
ink tank(s)
2. Replace the BJ
cartridge
Do problems still
occur?
Yes
Replace the purge unit
<Symptoms>
No prints; Partial prints; No prints for specific
colors
<Cause>
The ink tank(s), BJ cartridge, or purge unit is defective;
the orange cap is affixed to the head unit.
Is the orange cap attached to the head unit?
Are ink tanks installed correctly?
No
Repair or replace
relevant parts
Repeat these steps up to 5 times
See Part 3: 1.5.2 Nozzle check pattern printing (page 3-6)
No
END
No
END
4-15
Part 4: TROUBLESHOOTING