DENON hfe denon avr-590 790 1610 1620 1910 service en free download

File name hfe_denon_avr-590_790_1610_1620_1910_service_en.pdf

SAFETY PRECAUTIONS The following check should be performed for the continued protection of the customer and service technician. LEAKAGE CURRENT CHECK Before returning the unit to the customer, make sure you make either (1) a leakage current check or (2) a line to chassis resistance check. If the leakage current exceeds 0.5 milliamps, or if the resistance from chassis to either side of the power cord is less than 460 kohms, the unit is defective. CAUTION Please heed the points listed below during servicing and inspection. Heed the cautions! Inspect for safety after servicing! Spots requiring particular attention when servicing, such Check that all screws, parts and wires removed or discon- as the cabinet, parts, chassis, etc., have cautions indicated nected for servicing have been put back in their original po- on labels or seals. Be sure to heed these cautions and the sitions, inspect that no parts around the area that has been cautions indicated in the handling instructions. serviced have been negatively affected, conduct an insu- lation check on the external metal connectors and between Caution concerning electric shock! the blades of the power plug, and otherwise check that safety is ensured. (1) An AC voltage is impressed on this set, so touching in- ternal metal parts when the set is energized could (Insulation check procedure) cause electric shock. Take care to avoid electric shock, Unplug the power cord from the power outlet, disconnect by for example using an isolating transformer and the antenna, plugs, etc., and turn the power switch on. Us- gloves when servicing while the set is energized, un- ing a 500V insulation resistance tester, check that the in- plugging the power cord when replacing parts, etc. sulation resistance between the terminals of the power (2)There are high voltage parts inside. Handle with extra plug and the externally exposed metal parts (antenna ter- care when the set is energized. minal, headphones terminal, microphone terminal, input terminal, etc.) is 1M or greater. If it is less, the set must Caution concerning disassembly and be inspected and repaired. assembly! Though great care is taken when manufacturing parts from sheet metal, there may in some rare cases be burrs on the