Inspect Electrical Parts
23
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.
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).
Ground Lug
NOTE: The card cage fan
and power supply board are
removed here for clarity.
Ground Cable
(To Power
Supply J1)
IEC 320 AC Power
Connector (J301)
Circuit
Breaker
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