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KODAK 1200i WIDE-FORMAT PRINTING SYSTEM
Technical Training Guide 71
CAUTION: if neutral-to-ground voltage, above 6 volts AC, is present then a serious
problem is present within the building's electrical system. Often a mis-wired connection
or imbalanced phase load can cause
voltage/current to ‘bleed’ onto the ground line
(commonly referred to as neutral-to-ground
voltage) or a serious ground fault exists within
the building. Immediately stop service on the
printer. The printer is extremely dangerous to
work on in this condition (with power applied)
and is a personnel hazard. The problem, for the
symptoms described in section A, cannot be
fully diagnosed and/or corrected until the
electrical system/receptacle is properly fixed.
Inform the customer a certified electrician will
need to be contacted to upgrade the electrical
system with a properly grounded outlet or to correct a neutral-to-ground voltage problem.
D. Power/Voltage Testers
1. In North America, basic receptacle testers are available for
testing standard 110 volt receptacle/wall outlets for proper
polarity and ground detection. These models are probably the
fastest way in detecting improper wiring or the presence of a
ground fault.
The three LEDs help the electrician or technician identify:
Correct wiring
Hot/neutral reverse
Hot/ground reverse
Missing neutral
Missing ground
Missing hot.
2. In other continents a simple voltage ‘screwdriver’ may be used,
such as the inexpensive Stanley 3MM Voltage Tester. These tools
are used to determine the presence of phase on a hot line (L),
neutral (N) or even ground (G).
3. The universal test instrument is the voltmeter or multimeter which
may be used to measure dc, ac, resistance, etc.