- Hewlett-Packard LaserJet Printer Service Manual

Identification
Model and Serial
The model number and serial numbers are listed on identification labels located on
the bottom of the printer. The model number is alphanumeric, such as C3941A for
the HP LaserJet 5L printer, and C3990A for the HP LaserJet 6L printer.
The serial number contains information about the Country of Origin, the Revision
Level, the Production Code, and production number of the printer.
The labels also contain power rating and regulatory information.
HP LaserJet 5L Model and Serial Numbers
Figure 1-1
1-4 Product Information