HEIDENHAIN ND 1400 - Manual (Page 5)

WARNINGS
Disconnect the QC-330 from power before cleaning.
The QC-330 is equipped with a 3-wire power plug that includes a separate ground
connection. Always connect the power plug to a 3-wire grounded outlet. The use of
accessories that remove the third grounded connection such as a 2-wire power plug adapter create
a safety hazard and should not be permitted. If a 3-wire grounded outlet is not available, ask your
electrician to provide one.
DANGEROUS VOLTAGE
Do not open the enclosure unless you are a qualified service person approved by
Metronics, Inc., and never open the enclosure while power is connected. There are no
user-serviceable components or assemblies inside. Refer servicing to qualified service
personnel.
General Maintenance
Disconnect the QC-330 from power and seek the assistance of a qualified service technician if:
• The power cord is frayed or damaged or the power plug is damaged
• Liquid is spilled or splashed onto the enclosure
• The QC-330 has been dropped or the exterior has been damaged
• The QC-330 exhibits degraded performance or indicates a need for service some other way
Cleaning the enclosure
Use only a cloth dampened with water and a mild detergent for cleaning the exterior surfaces. Never use
abrasive cleaners, and never use strong detergents or solvents. Only dampen the cloth, do not use a cleaning
cloth that is dripping wet. Instructions for cleaning the touch screen are different and are given below.
Cleaning the touch screen
The touch screen should be cleaned as described below to prevent scratching or wearing the screen surface
and to prevent liquids from leaking into the enclosure.
Use only a soft, lint-free cloth dampened with water for cleaning the touch screen. Never use abrasive
cloths or paper towels. Never use abrasive cleaners, and never use detergents or solvents. Only dampen
the cloth, do not use a cleaning cloth that is dripping wet. Never spray the screen.
If the screen is badly soiled, the cloth can be dampened with a 50:50 mixture of isopropyl alcohol and
water. Remember, only dampen the cloth, do not use a cleaning cloth that is dripping wet, and never spray
the screen.