IBM 6500-V5P Maintenance Manual - Page 23

Inspect Electrical Parts Inspect Electrical Parts Safety Ground Path 1. Make sure the printer power cord is unplugged. 2. Cabinet Model: Remove the paper guide assembly (page 348). Pedestal Model: Remove the top cover assembly (page 327). 3. Make sure the ground cable from the circuit breaker power leads is undamaged and firmly attached to the ground lug on the wall of the card cage, as shown in Figure 1. NOTE: Ground paths for the printer are summarized in and Figure 2. NOTE: The card cage fan and power supply board are removed here for clarity. Circuit Breaker IEC 320 AC Power Connector (J301) Ground Lug Ground Cable (To Power Supply J1) Figure 1. This figure is a detail drawing showing the ground lug for the circuit breaker of cabinet models. 4. Set a Fluke meter (P/N 8496278) or similar device to the lowest resistance scale. Measure the resistance between the power cable ground pin and the printer frame: safety ground circuits should measure 0.1 Ohm or less. 5. Cabinet Model: Install the paper guide assembly (page 348). Pedestal Model: Install the top cover assembly (page 327). 23