Preliminary Checks; Precautions In Performing Work - Epson EPL-N3000 Service Manual

EPSON EPL-N3000/AcuLaser M4000N

3.1.3 Preliminary Checks

Before starting troubleshooting, be sure to verify that the following conditions are all
met:
The power supply voltage must be within the specification limits. (Measure the
voltage at the wall socket.)
The POWER CORD must be free from damage, short circuit or breakage, or
miswiring in the POWER CORD.
The printer must be grounded properly.
The printer should not be located in a place where it can be exposed to too high or
low temperature, too high or low humidity, or abrupt temperature change.
The printer should not be located near waterworks, near humidifiers, near heaters
or near flames, in a dusty atmosphere or in a place where the printer can be
exposed to blast from an air conditioner.
The printer should not be located in a place where volatile or inflammable gases
are produced.
The printer should not be located in a place where it can be exposed to direct rays
of the sun.
The printer must be located in a well-ventilated place.
The printer must be placed on a strong and steady level table.
The paper used must conform to the specification. (The standard paper is
recommended.)
There is no error in handling of the printer.
The Regular Replacement Parts must have been replaced every time their
respective specified numbers of sheets had been printed.
Check the inside of the printer, and remove foreign matters, if any, such as paper
clips, staples, bits of paper, paper dust or toner.
Clean the inside of the printer and the rubber rolls.
Troubleshooting

3.1.4 Precautions in Performing Work

Be sure to unplug the POWER CORD before starting troubleshooting work except
when turning power ON is needed.
Never touch any live parts unnecessarily when power is on.
W A R N I N G
The power switch/inlet part of the LVPS is alive even when the
power switch is turned OFF. Take care not to touch any live parts.
If you perform work with the power turned ON, covers removed and the interlock
and safety switches turned ON, be sure to disconnect the ROS ASSY connector (P/
J140), except when its connection is required.
If you perform work with the power turned ON, covers removed
W A R N I N G
and the interlock and safety switches turned ON, there is danger of
laser radiation being emitted from the ROS ASSY. Be sure to
disconnect the ROS ASSY connector (P/J140), except when its
connection is required.
Before starting work operations with the LEFT COVER removed and with power
on, be sure to disconnect the connector (P/J15) on the HVPS/MCU except when its
connection is needed.
If you perform work with the power ON and the LEFT COVER
W A R N I N G
removed, a high voltage may be output from the HVPS/MCU. Be
sure to disconnect the connector (P/J31) on the HVPS/MCU.
If any error diagnosis item requires the connector (P/J31) on the
HVPS/MCU to be connected, take great care not to touch the
HVPS/MCU or high voltage output parts.
When you touch any surface which can become hot, take care not to suffer a burn.
Wear a wrist strap to discharge static electricity from the human body, whenever
possible.
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