直观检查法是断开电源后立即进行。不用仪器、仪表，凭直观的感觉，调动视觉、听觉、嗅觉、触觉等4种感觉特性，进行判断。这种检查方法虽然准确性较差些，但速度快，直观检查法尤其对济南音响电源故障检查很有用。
Visual inspection method is immediately disconnect the power supply. No instrument, instrument, intuitive feeling, visual, auditory, olfactory, arouse tactile 4 sensory characteristics, judge. This inspection method, although accuracy is less, but the speed is quick, visual inspection method especially for Ji'nan audio power failure inspection is very useful.
一看 观察济南音响或部件及其外部结构。看按键开关、接口、指示灯有无松动，线路板接绪有无脱落，有无虚焊、变色、裂痕、爆裂等现象，保险丝有无烧断、打火、冒烟、变形、未卡住等问题，采用眼睛，直接识别和判断。
A look at the observation of Ji'nan sound or component and its external structure. Look at the key switch, interface, indicator light is not loose, circuit board connecting thread off, there is no weld, discoloration, cracks, spalling, fuse with and without burning, fire, smoke, deformation, not sticking problem, use eyes, direct identification and judgment.
二听 轻轻翻动济南音响或部件，摇摆摇摆，听听有无零件散落或螺丝钉脱落情况，是否有碰击声。作连续翻转有无不正常的“吱吱”声或“啪啪”的打火声(通电时)。如果有这些现象，故障可能出现在这些地方。
Two hear gently toss Ji'nan audio or components, swaying, listen to have no loose parts or screw off, whether a rattle. As the flame sound continuous turnover are all normal "squeak" sound or "pops" (electricity). If any of these phenomena, the possible faults in these places.
三闻 用鼻子闻闻有无烧焦气味，找到气味来源，故障可能出一放出异味的地方。
Three smell smell with the nose have no burnt smell, find the odor source, failure may be a release the smell of the place.
四摸 用手摸摸济南音响 http://www.jnzqyx.com/ 变压器外壳(断电后进行)，不要触及接线端子，因为有时因充电电容存在，电压甚高，危及安全。感觉一下，是否超过正常温度、发烫，无法触摸。功率管有无过热或冰凉现象。调整管有无过热或冰凉不热现象。如果有这些现象，问题可能出现在这些地方。
Four touch touched Ji'nan audio transformer shell (power of), don't touch the wiring terminal, because sometimes for charging the capacitor, voltage is very high, endangering the safety. Feel, is more than the normal temperature, hot, can not touch. The power tube without overheating or cold phenomenon. Adjust the tube without overheating or cold not hot phenomenon. If any of these phenomena, problems may appear in these places.