Chapter 6 Maintenance Warning: Do not repair the instrument arbitrarily; it should be maintained and repaired by professional personnel. Keep the instrument away from liquid; do not leave articles especially conductive objects in the instrument.
6.1 Service If the equipment fails and cannot be switched on, you should first check the battery and external power supply, power jack, etc.; check whether the key is invalid; If the test result is abnormal, first check if the test accessories have problems, and if there is damage of the spring in the test notch; at the same time review the specification to confirm if the operation is correct; Do not arbitrarily replace the components and specific parts, please contact the relevant dealer or service company for problems which cannot be confirmed. 6.2 Clean Before cleaning, user should remove the battery and external power supply and shut down the instrument.
Prevent water or other liquids to enter the instrument through the test slot, keys, or other joints. If it happens by accident, you should immediately stop using it and remove the power supply and battery. Please clean with a soft cloth and diluted neutral detergent, and carefully wipe the dirty parts to prevent scratches on the surface. After cleaning, the instrument should be completely dry before used. 28