家电维修口诀（Appliance repair formula）.docVIP

家电维修口诀（Appliance repair formula） This paper consists of 807376983 contributions DOC documents may experience poor browsing on the WAP side. It is recommended that you first select TXT, or download the source file to the local view. = Appliance repair formula = Click: 134 Release time: 2008-8-14 12:03:57 The maintenance of colour TV sets is not difficult. Operate carefully, be careful, pay attention to man-machine safety. City electricity and confidential isolation, iron grounding properly. Turn the machine board to power off, the lower conductor to move side. Work conditions, electric headed, the first to test the power supply side. Based on the phenomenon of range, from the simple to the individual can push. Please review the following items from start to finish. 2. power supply overhaul Line sweeping, power failure complex, with the three noes are common. Disconnect the load and connect the bulb. The fault range is clear. If the fault is in the power supply, the rectified output terminal shall be measured first, If there is no three hundred (V) check the insurance, the insurance has been broken dont change A rectifier circuit, filter capacitor or breakdown; The degaussing circuit must be checked for switching tubes or breakdown. As long as careful arrangement, so the technology is smart, not general. If three hundred (volts) has an output, the protection is first measured and the control is broken The protection circuit is not operating, the starting circuit is checked first; Feedback circuit also need to check, pulse width modulation carefully. The output voltage is high and low, and the fault is in the voltage stabilized zone. The trimming resistor is replaced first, and the error amplification must be checked. Constant pressure system, carefully check, will be able to row, so happy hee hee. 3. line scanning part of the overhaul Line sweeping fault is not common, you need to be patient and look carefully. The capacitor has no blowout, and the resistance is not v