Servicing Precaution - Kortek KTN-2001 Service Manual

KORTEK Corporation

1-2. SERVICING PRECAUTION

WARNING 1 : First, reading "safety precaution" section of this manual. If unforeseen
circumstances create conflict between the servicing precautions and safety
precaution, always follow the safety precautions.
WARNING 2 : A high voltage VR replaced in the wrong direction may cause excessive
X-RAY Emitting.
WARNING 3 : An electrolytic capacitor installed with the wrong polarity might explode.
1) Servicing precautions are printed on the label, and should be followed closely.
2) Always unplug the AC power cord from the AC power source before attempting to remove
or reinstall any component or assembly, disconnect PCB plugs or connectors, connect any test
component in parallel with an electrolytic capacitor.
3) After servicing, always check that the screw, components and wiring have been correctly
reinstalled. Make sure that the area around the serviced part has not been damaged.
4) Check the insulation between the blades of the AC plug and accessible conductive
parts(example : metal parts, input terminals)
5) Never touch any of the locked B+ voltage. Do not apply AC power to the unit (or any of its
Assemblies) unless all solid-state heatsinks are correctly installed.
6) Always connect a test instrument's ground lead to the instrument chassis ground before
connecting the positive lead; always remove the instrument's ground lead last.
KTN-2001/1401
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