MaintenanceReplacing the PrintheadUse the following procedure to replace the print head in the printer module assembly.1. Hold the new print head so the longer ribbon cable is on the right, as shownin the following photograph.2. With the front of the printer module assembly facing you, gently thread theprinter ribbon cables through the printer module assembly and snap the printhead into the metallic print head holder, as shown in the following photograph.NOTE:Make sure the longer printer ribbon cable is on the side of the printer moduleassembly with the lever and not the printer motor. When facing the front ofthe printer module assembly, this would be on the right.3. With the rear of the printer module assembly facing you, secure the print headto the printer module assembly using the two M3x4 fasteners, as identifiedin the following photograph.4. Reattach the printer module assembly to the bottom cover.See “Replacing the Printer Module Assembly” on page 95 for instructions.5. Continue with the appropriate functional checkout procedure for this FRU.See “Functional Checkout” on page 129 for more information.102 MAC™ 2000 ECG Analysis System 2053535-003C