Genicom 3600 - Manual (Page 85)

Troubleshooting
4-15
4
AC Power Problems (Surges, Sags, Spikes, Noise, and Outages)
Most environmental problems involve the AC power line. In the 3600 printer,
115V supply voltages can range from 90 to 132 VAC. Outside the U.S., 230V
supply voltages can range from 180 to 264 VAC. Voltage overages or
underages can result from poor utility regulation to in-plant loading of the
power service. Use a power line monitor, such as the BMI 4800, to look for
power service problems. To eliminate the effects of voltage overages and
underages, install an uninterruptible power supply (UPS) or install a dedicated
circuit for the printer and the host computer.
Intermittent power outages can be caused by a combination of vibration and
loose connections between the service panel and the AC receptacle. Check the
wiring to ensure that all connections are solid and secure. Use a power line
monitor to test for outages. To eliminate the effects of power outages, install a
UPS.
Impulse noise on the power line can also cause the printer to lockup or reset.
All Intermec products, including the 3600 printer, meet IEC 801, Surge and
Burst specifications. Impulses can range from 200 to 5000V and are caused by
lightning, switching operations, firing of SCRs, triacs, static discharge, and arc
welders. Use a power line monitor to verify the presence of impulse noise, and
use a spike suppressor to eliminate its effect.
Irregular sine waveforms on the AC power line can also affect printer
performance. They are caused by switching power supplies. Use a power line
monitor to verify the presence of irregular sine waveforms and use a power
line conditioner to eliminate their effects.
High frequency noise and hash riding on the AC waveform can affect printer
performance. They are caused by transmitters and ignition systems. Use an
oscilloscope to verify the presence of noise and hash. Install EMI/RFI filters to
eliminate their effects.
To troubleshoot environmental problems
1. Correlate an environmental event with the failure.
2. Check for static discharges.
3. Check for adequate grounding.
4. Check the AC power for proper level and purity.
5. Check for inductive motors, relays, or other spike inducing equipment on
the power line.
6. Exercise good judgment and common sense.