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在濟南汽車音響改裝電路中，各部分電路出現異常所表現的故障現象，一般都有其規律性。從大量納檢修實例來看，故障發生的原因及部位均有相似之處，一般有以下幾種情況。
In Jinan, car audio conversion circuit, the various parts of the circuit fails demonstrated abnormal phenomenon, generally has its regularity. From a large number of satisfied overhaul instance, the causes and the site of failure are similarities, generally have the following situation.

1.機芯系統故障。需經常維護、清洗的部位主要有磁頭、壓帶輪等，由于這類機構不便于清洗，也是導致走帶不暢、變調及絞帶的主要原因。機芯滑板及活動部件缺油是造成按鍵及磁帶進、出不暢的主要原因。
1. Movement system failure. Need regular maintenance, cleaning the site of the main heads, pinch roller, etc., since these institutions are not easy to clean, but also lead to poor tape, pitch and twist the main reason for the belt. Movement skateboards and moving parts caused by lack of oil is the key and tape into and out of the main reason for the poor.

2.收音部分故障。一般來說，收音部分出現故障的機會較小，特別是高頻頭組件，如果此部分出現故障，多數為硬損傷， 例如線圈開焊、斷裂造成的接觸不良以及元件損壞等。如果不能收音，應先檢查這些部位，然后再檢查外圍元器件。
2. The radio part of the fault. In general, the chance of failure is small radio part, especially the high-frequency head assembly, if this part fails, the majority of hard-injury, such as a coil open welding, poor contact and component damage caused by breakage, etc. If you can not radio, you should first check these parts, and then check the external components.
 　
3.功率放大器故障。功率放大器是汽車收放機故障率最高的部分(占檢修故障的80%以上)，很多故障都是因為功放集成塊被擊穿引起的。究其原因不外乎兩種情況：一是汽車發電機電壓調節器不良，引起電源電壓上升過高，發生過壓或過載而損壞；二是汽車電機產生的瞬態峰值電壓將集成塊擊穿。
3. The power amplifier failure. PA is the highest part of the car cassette players failure rate (more than 80% of maintenance failure), because a lot of failures are caused by the breakdown of the power amplifier manifold. The reason for no more than two situations: First, bad car generator voltage regulator, causing the power supply voltage rises too high, the pressure or overload damage occurred; the second is the transient peak voltage generated by the motor car will be manifold breakdown .

4.磁帶放音電路故。磁帶放音電路出現異常時，出現放音無聲或音量小、失真等現象。若長期不清洗磁頭太臟，就會導致音 量小、高音衰減甚至無聲。放均衡放大電路故障率不是太高，尤其是均衡放大電路中使用的集成電路不太容易損壞，但其外圍的元件，尤其是小型瓷片電容有時會出 現失效或漏電現象，檢修中應注意。
4.The tape playback circuit so. When tape playback circuit is abnormal, appeared playback silent or small volume, distortion, and so on. If long periods of cleaning head dirty, it will lead to a small volume, treble attenuation or even silent. Put a balanced amplifier circuit failure rate is not too high, especially balanced amplifier integrated circuits used in the circuit is not easy to damage, but its peripheral components, especially small ceramic capacitors sometimes failure or leakage, maintenance should pay attention to.

5.其它易損件故障。汽車收音機中的電位器也是較容易損壞的元件之一，電位器的損壞主要是帶開關的音量及音調電位器， 主要表現為接觸不良、轉軸斷裂等。若電位器轉軸斷裂應更換；若電位器內部接觸不良，可先滴入少量機油并轉動幾次，如果仍接觸不良，就是膜片與觸點磨損太 多，應更換新件。
5. Other wearing parts failure. One element of the potentiometer car radio is also relatively easy to damage, potential damage to the main volume and tone with switch potentiometer, mainly for poor contact, the shaft fracture. If the potentiometer shaft fracture should be replaced; if the internal potentiometer is bad, can be dropped into a small number of oil and turn a few times, if still bad, is the diaphragm and contact wear too much, should be replaced with new parts.

濟南汽車音響改裝：http://www.szanyuda.com/