Identification (model and serial numbers) To identify the model number and serial number, find the label located on the rear of the printer, similar to the one shown in figure 2 (the example shown is from an HP Color LaserJet 8500 printer). (serial #) (model #) Figure 2. Example of printer model number and serial number label (110 V and 220 V) 38 Chapter 1 - Product information EN