
Page 4-36 Z4M/Z6M Maintenance Manual 77259L Rev. 4 12/16/03
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19. Refer to Figure 4-29. Set your VOM (voltage ohm meter) to the lowest ohm range
and connect the meter between the main frame and the main AC input ground. The
reading must be less than one ohm.
Figure 4-29. Test the Power Supply
20. Leave the AC power cord disconnected and turn the power switch On (l).
21. Set the VOM to the highest ohm range and measure between ground and both the
return and hot terminals in the AC power module. Both readings must be in the
Mega ohm to infinite range.
22. Place the printer in the upright position and open the media door. Install the media
and ribbon and close the media door.
23. Refer to Refer to Figure 4-15. Install the electronics cover by tightening the two
screws that secure it.
24. Reinstall the media and ribbon, and close the media door.
25. Reconnect the AC power cord and restore power.
26. Turn the printer On (l).
VOM
Ground Probe
Positive Probe
Main Frame
To Chassis Ground
Caution • Stop. If the VOM readings are not as indicated, do not apply power to the
printer until the source of the problem has been corrected.
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