HP LaserJet 4 Service Manual - Page 399

Identification The model number is on a label placed on the outside, rear cover of the printer. The model number (C3916A, C3917A, or C3952A) is found at the top of the label. The model number is the base number for all printers. The serial number contains information about the printer. The serial number Alpha section refers to the Country of Origin, the Revision Level and the Production Code. The Numeric section refers to the production number of the printer. See the following for information about the production codes. A typical serial number would consist of: CC R P XXXXXX Code Meaning CC R P XXX-XXXX Country of Origin Revision Number - Alphanumeric, no vowels Production Code - Alphanumeric, no vowels Numeric serial number - Numeric, no alphas Figure B-1 Printer Identification Label for the HP LaserJet 5/5M/5N LaserJet 5/5M/5N Printer B-5