| C4207-60001 | I/O daughter PC board - L shaped PC board that plugs into Formatter board - This board contains the parallel and C-link connectors - Not a Jet Direct board |
| C4227-60001 | Formatter PCA for HP Color LaserJet 4550 Series |
| C4227-69002 | Formatter PCA for HP Color LaserJet 4550 Series |
| J3111-69001 | JetDirect 600N EIO internal print server 10Base-T, 10BASE-2, and LocalTalk LAN interface board - Has one RJ-45, BNC, and 8-pin DIN connector;Click to order the functional equivalent: J4135-61001 |
| J4135-61001 | JetDirect connectivity card - Has one USB port, one serial (DB9) port, and one LocalTalk port |
| J4167-69001 | JetDirect 600N EIO internal print server token ring LAN interface board - Has one RJ-45 and DB-9 connector |
| RG5-3810-000CN | Paper feed PC board |
| RG5-3816-000CN | Paper size sensor board |
| RG5-5180-000CN | Developing PC board |
| RG5-5254-000CN | DC controller board |