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5. Precaution - Important
1) General
You have to take utmost care to follow the general rules and practice for safety in servicing electrical
medical equipment.
2) Power off before servicing
For electrical safety, make sure to disconnect the power cable before opening the cover.
3) Route of electrical wire
Be sure to keep the original routes of the electrical wires and the original positions of the cores.
Otherwise it may break the compatibility with the EMC regulation or may cause problems such as
lamp ignition failure. You must put the wires back to the original routes after the maintenance. You
should take photos of the wires and cores beforehand.
4) High temperature on the lamp
Just after turning off the lamp it may be hot. Be careful not to suffer heat injuries when replacing a
lamp.
5) Electrostatic Discharge
To avoid damaging PCBs, wear anti-static protection such as a wristband and discharge the
electrostatic charge before servicing.
6) Disassembling parts
The procedures of disassembling the mechanical and electrical parts are not described in detail in the
service manual. Unless otherwise mentioned, detach from the outer parts to the inner parts or from the
upper parts to the lower parts. In the case a special technique is necessary, it is described. You can
refer to the exploded view pages as well.
7) Electrical safety test
Be sure to do the following tests when you did a repair by opening the cove, after putting back all of
the disassembled parts and the cover to the original position. The procedures are described in
following pages.
a) Dielectric strength test, b) Protective earthing circuit resistance, c) Leakage current test
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