DMTECH dmtech dm32xt lcd tv free download

File name dmtech_dm32xt_lcd_tv.pdf

SERVICE MANUAL 1.PRECAUTIONS Prior to shipment from the factory,the products are strictly inspected to conform with recognized product safety and Electrical codes of the countries in which they are to be sold.However, in order to maintain such compliance,it is equally important to implement the following precautions when a set is being serviced. 1-1.Safety Precautions 1) Before returning an instrument to the customer, always and repeat the test. make a safety check of the entire instrument, including, but not limited to, the following items: (1) Be sure that no built-in protective devices are defective or have been defeated during servicing. (1) Protective shields are provided to protect both the technician and the customer. Correctly replace all missing protective shields, including any remove for servicing convenience. (2) When reinstalling the chassis and/or other assembly in the cabinet, be sure to put back in place all protective devices, including, but not limited to, nonmetallic control knobs, insulating fish papers, AC Leakage Test adjustment and compartment covers/shields, and isolation resistor/capacitor networks. Do not operate Any measurements not within the limits specified this instrument or permit it to be operated without all herein indicate a potential shock hazard that must be protective devices correctly installed and functioning. eliminated before returning the instrument to the customer. (2) Be sure that there are no cabinet opening through which adults or children might be able to insert their fingers (4) Insulation Resistance Test Cold Check-(1) Unplug the and contact a hazardous voltage. Such openings power supply cord and connect a jumper wore include, but are not limited to, excessively wide between the two prongs of the plug. (2) Turn on the cabinet ventilation slots, and an improperly fitted power switch of the instrument. (3) Measure the and/or incorrectly secured cabinet back cover. resistance with an ohmmeter between the jumpered AC plug and all exposed metallic cabinet parts on the (3) Leakage Current Hot Check-With the instrument