重(zhong)慶直流屏輸出電壓過高

原因：電(dian)壓(ya)反饋(kui)電(dian)路故(gu)障，導(dao)致充電(dian)模(mo)塊(kuai)無法準確檢(jian)測輸(shu)出電(dian)壓(ya)；或充電(dian)模(mo)塊(kuai)的控(kong)制(zhi)芯片出現故(gu)障，不能正常調節輸(shu)出電(dian)壓(ya)。

解(jie)決方(fang)法：檢查電壓反(fan)饋電路中的電阻(zu)、電容等元(yuan)件是(shi)否損(sun)壞，如(ru)有損(sun)壞則更換(huan)(huan)相(xiang)應元(yuan)件；若(ruo)確定是(shi)控制(zhi)芯(xin)片故(gu)障(zhang)，一般(ban)需聯系專業(ye)維修人員(yuan)或廠家進(jin)行芯(xin)片更換(huan)(huan)或模(mo)塊整(zheng)體更換(huan)(huan)。

輸出電壓過(guo)低(di)

原因(yin)：輸(shu)入電(dian)(dian)(dian)壓過低(di)，低(di)于充電(dian)(dian)(dian)模塊的工作電(dian)(dian)(dian)壓范圍(wei)；模塊內(nei)部(bu)的功率器件損(sun)壞，如(ru)開關管、整流二(er)極(ji)管等，導致(zhi)輸(shu)出(chu)功率下降；充電(dian)(dian)(dian)模塊的參數設(she)置錯誤，如(ru)充電(dian)(dian)(dian)電(dian)(dian)(dian)壓設(she)定值過低(di)。

解決方法(fa)：測(ce)(ce)量(liang)輸入(ru)電(dian)(dian)(dian)(dian)壓(ya)，若輸入(ru)電(dian)(dian)(dian)(dian)壓(ya)過低，檢(jian)查(cha)前端供電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)路，恢復(fu)正(zheng)常輸入(ru)電(dian)(dian)(dian)(dian)壓(ya)；檢(jian)查(cha)功率(lv)器件，使(shi)用萬用表等(deng)工具(ju)檢(jian)測(ce)(ce)其是否損(sun)壞，如有損(sun)壞則更換；檢(jian)查(cha)充電(dian)(dian)(dian)(dian)模塊的參數設(she)(she)置(zhi)，按照說明(ming)書正(zheng)確設(she)(she)置(zhi)充電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)壓(ya)等(deng)參數。