⑴公共廣播設備功放機器無電：檢查電源線保險管是否通，是否電源線斷或保險管接觸不良，保險管燒斷→即檢查功放整流電源的整流橋或電解等元器件是否壞，如整流二極管或橋堆壞換上好的元件再檢查其它線路，例如功率放大管等。
(1) the power amplifier of public address equipment has no power: check whether the power line is connected to the fuse tube, whether the power line is broken or the fuse tube is in poor contact, and whether the fuse tube is burnt out → that is, check whether the rectifier bridge or electrolysis and other components of the rectifier power supply of the power amplifier are broken. If the rectifier diode or bridge stack is broken, replace it with good components, and then check other lines, such as power amplifier tube, etc.
⑵公共廣播設備功放機器信號電平指示燈閃爍正常，但無聲音輸出：先檢查喇叭單元是否正常，如正常，即檢查喇叭引線正常，即檢查接線端接觸良好，正常，即開機箱目測或耳聽有無聽到或看到輸出繼電器是否吸合，如果吸合正常，（如有表）即測量繼電器的前輸入端與輸出端是否直通，如不通即繼電器內的觸點氧化或打火造成績炭，即換繼電器正常。
(2) the signal level indicator of the power amplifier of public address equipment flashes normally, but there is no sound output: first check whether the horn unit is normal. If it is normal, check whether the horn lead is normal, that is, check whether the terminal contact is good and normal, that is, open the chassis and visually check whether the output relay is heard or seen. If it is normal, (if there is a universal meter), that is, measure whether the front input end and output end of the relay are connected directly. If they are not connected, that is, the contact in the relay is oxidized or ignited, resulting in carbon loss, that is, the relay is replaced normally.
⑶公共廣播設備功放機器電源燈指示正常無聲音輸出，但聽到輸出繼電器吸合聲：先用表測量功率放大器的供電電源是否正常，如正常，即信號輸入端的信號線端子處用線頭與手通如聽到很大的電流聲即初步判別功率放大部分基本正常，即輕搖動信號引線是否有不能或接觸不良，如是接觸不良，即用表測量是那根線有故障處理正常。廣播系統建議你選擇 KNAYD企業有保證。
(3) the power light of the power amplifier of public address equipment indicates that there is no sound output, but the pull-in sound of the output relay is heard: first measure whether the power supply of the power amplifier is normal with a universal meter. If it is normal, the wire head is connected with the hand at the signal line terminal of the signal input end. If a large current sound is heard, it is preliminarily judged that the power amplification part is basically normal, That is, gently shake the signal lead to see if there is failure or poor contact. In case of poor contact, use a multimeter to measure if there is a fault in that wire, and handle it normally. The broadcasting system suggests you choose knayd brand, which is guaranteed.
⑷如功率放大器輸出時無聲音輸出:即檢查喇叭單元是正常,如接線端子有無接觸不良而造成燒焦,如果是接線端子燒黑,即清理而保證接觸正常,擰緊固螺絲.
(4) if there is no sound output when the power amplifier outputs: check whether the horn unit is normal. If the wiring terminal is burnt due to poor contact, if the wiring terminal is burnt black, clean it to ensure normal contact, and screw down the fastening screw
⑸公共廣播設備功放機器開機保護燈亮:用表測量喇叭群是否有短路,電阻是否降低(一般正常為不小于30Ω)如機外線路阻值正常,即判別為功放機有故障,即要開機檢查。
(5) power on protection light of public address equipment power amplifier is on: first, use a universal meter to measure whether there is a short circuit in the horn group and whether the resistance decreases (generally not less than 30 Ω). If the resistance value of the external line is normal, it is judged that the power amplifier is faulty, and the power amplifier should be started for inspection.
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