HP Color LaserJet 5550 Printer series - Manual (Page 159)

When to clean the static discharge comb
Clean the static discharge comb when you replace the black print cartridge, when you
replace the image transfer kit, or when print quality defects occur.
Note If you are replacing the black print cartridge, clean the static discharge comb first and then
replace the black print cartridge. (Toner might fall onto the black print cartridge during
cleaning.) Be careful not to get toner on your clothes
If you are replacing the image transfer kit, clean the static discharge comb with the new
cleaning brush included with the replacement image transfer kit.
ENWW When to clean the static discharge comb 145