In maintenance, the power switch on the back of the chassis is placed on the starting state, and the resistance of the power plug is measured with the use of the meter. The normal value is between 250 -300. If the resistance is infinite, is a power transformer primary open circuit. Suggested replacement for slightly larger power transformer, and in the primary circuit series a 0.5A fuse, conditions in fuse parallel connection behind a pressure-sensitive resistor for protection, avoid mains overvoltage when burned power transformer.

Fault phenomenon 2: silent, indicator light.

Analysis and maintenance of: indicator light that power supply basically normal, should first of all make sure that the computer, DVD and other audio without fault, and then check the active speaker. The sound of the sound of the sound box is: one is the input, the output socket contact is bad; the two is the volume potentiometer to adjust the minimum position; three is the internal circuit has the fault. When maintenance will be placed in the RX10 block, with one

Pen is connected to, another pen from the power amplifier circuit TDA2030A of feet, along the audio input line, the intermittent step by step touch connection point, according to whether the speaker a clicking sound, judge fault coverage.

Fault phenomenon 3: a speaker silent.

Analysis and maintenance of: the fault reasons: one is input and output socket connection is bad, or input and output wire breakage, the second is the soundless channel amplifier circuit damage, damage to the track of the speaker. In maintenance, the method can be used to determine the location of the fault. If the speaker plug, the original silent speaker sound, is the internal power amplifier circuit damage. If the plug is connected to the speaker, the silent speaker is still silent, and the speaker is damaged or the speaker wire and plug is open. If interchange input wires, the original silent channel still silent, it is internal speaker power amplifier or loudspeaker fault; if interchange input wires, the original silent channel into sound, it is computer or DVD audio fault or the sound source to the active speaker socket wire breakage.

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