Samsung precaution free download

File name precaution.pdf

1. Precautions 1-1 Safety Precaution 1) Before returning an instrument to the customer, always make a safety check of the entire instrument, Any measurements not within the limits specified including, but not limited to, the following items: herein indicate a potential shock hazard that must be eliminated before returning the instrument to (1) Be sure that no built-in protective devices are defective or have been defeated during servicing. (READING SHOULD (1)Protective shields are provided to protect both NOT BE ABOVE the technician and the customer. Correctly replace 0.5mA) LEAKAGE all missing protective shields, including any DEVICE CURRENT UNDER TESTER removed for servicing convenience. TEST (2)When reinstalling the chassis and/or other as- TEST ALL sembly in the cabinet, be sure to put back in place EXPOSED METER SURFACES all protective devices, including, but not limited to, nonmetallic control knobs, insulating fish papers, 2-WIRE CORD adjustment and compartment covers/shields, and ALSO TEST WITH EARTH isolation resistor/capacitor networks. Do not oper- PLUG REVERSED GROUND (USING AC ADAPTER ate this instrument or permit it to be operated with- PLUG AS REQUIRED) out all protective devices correctly installed and functioning. the customer. Fig. 1-1 AC Leakage Test (2) Be sure that there are no cabinet openings through which adults or children might be able to insert (4) Insulation Resistance Test Cold Check-(1) Unplug their fingers and contact a hazardous voltage. Such the power supply cord and connect a jumper wire openings include, but are not limited to, excessive- between the two prongs of the plug. (2) Turn on the ly wide cabinet ventilation slots, and an improper- power switch of the instrument. (3) Measure the ly fitted and/or incorrectly secured cabinet back resistance with an ohmmeter between the