Tektronix OM4006D, User Manual, Page: 201 / 205

Appendix H: Cleaning and maintenance
Cleaning
To clean the outside of the OM4000 enclosure, use a dry, soft cotton cloth. Do
not use any liquid cleaning agents or chemicals that could possibly in
fi ltrate
the enclosure, or that could damage markings or labels.
If the dust fi lter on the underside of the unit becomes clogged, use a small
vacuum or brush to clean the fi lter.
From time to time it will be necessary to clean the optical input and output
connectors on the front of the unit. Use square-ended swabs made for this
purpose to clean each connector.
Do not attempt to clean the inside of the instrument; cleaning of internal parts
is not necessary.
Maintenance
There are no user-serviceable components or subsystems within the OM4000.
Attempting any internal repairs will void your warranty. Never remove the
external lid on the unit.
WARNING.
Removing the external lid and the internal cover on the optics package
while the unit is operating will result in exposure to invisible laser radiation.
Never view directly with optical instruments.
If it becomes necessary to replace the fuse in the power input module in the
rear of the unit, use a 5X20mm “slo-blo” fuse rated at 1A, 250 VAC. Use a
small screwdriver to gently pry open the fuse drawer.
WARNING.
Disconnect the unit from the power source when changing the fuse to
ensure that line voltage is not present during the replacement.
OM4000D Series Coherent Lightwave Signal Analyzer 177