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实例1:一台Canon(佳能)FAX-410型传真机,接通电源开机后,整机面板上的LCD无显示,按“START键,机器也不进行切纸动作。故障分析与检修:由故障表现分析判断,该传真机主控板上无+5V直流电压是因电源电路出了故障,应重点检查其电源电路。有关电路如图1所示(图见下期)。关断电源,拔下电源线,检查后面板上的保险丝没
Example 1: A Canon FAX-410 fax machine, the power is turned on, the whole LCD panel no display, press the ”START button, the machine does not cut the paper. Failure Analysis and Overhaul: According to the analysis of the fault performance, no + 5V DC voltage on the main control board of the facsimile machine is due to the fault of the power supply circuit, and the power supply circuit should be emphatically inspected. The related circuit is shown in Fig. 1. (Turning off the power supply, Unplug the power cord and check the fuse on the rear panel