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二、电源板故障维修TLM3237D电源板发生故障,主要引发开机“三无”、“黑屏”故障,可通过观察待机指示灯是否点亮,测量关键的电压,解除保护的方法进行维修。图7所示是TLM3237D电源板故障维修步骤流程图(见下页)。本机电源板可以从电视上摘下独立维修,维修时只需要把开/关机控制电路晶体管V816的c-e极短接,整机就处于开机状态,各路电压均有输出。在维修不是带负载能力差的故障时,本电源可以空载维修。l.待机指示灯不亮
Second, the power board fault repair TLM3237D power supply board failure, the main boot “three no ”, “black screen ” failure, by observing the standby indicator light is on, measure the key voltage, the protection of the way to repair . Figure 7 shows the TLM3237D power board troubleshooting steps (see next page). The local power board can be removed from the TV independent maintenance, repair only need to turn on / off control circuit transistor V816 c-e very short, the whole machine is on, the voltage is output. In the maintenance is not with poor load capacity failure, the power can be no-load maintenance. l. Standby light is off