非遥控彩色电视机是我国早期彩电,使用至今已有十余年,目前大部分此类彩电已进入了维修或淘汰期。其故障多为频道不稳、逃台(非电子调谐器故障)、节目预选困难等。引起此故障的原因是频道按键和预选器内部的铜片、触点和碳膜电阻片等因长时间使用被腐蚀或氧化,造成接触不良。随着电视机的更新换代,早期彩 Non-remote color TV is China’s early color TV, use has been more than ten years, most of these TV has entered the maintenance or phase-out period. Most of its failure to channel instability, escape Taiwan (non-electronic tuner failure), the program pre-selection difficulties. The reason for this failure is that the copper buttons, contacts, and carbon film resistors inside the channel buttons and preselector are corroded or oxidized due to long-term use, resulting in poor contact. With the replacement of the TV, early color