我段的机车都加装了 ZTL—1型自动停车装置,这给行车安全带来了一定的保障,同时亦给检修工作增添了新的内容。我们在检修中发现,控制盒和报警盒内的印刷电路板只要多焊修两次,上面附着的电路就会脱离基板。这个板的损坏,给检修工作带来很大的麻烦。原因在于电路与基板的附着面积太窄,焊点周围面积小,一遇热就出现脱离 I have installed a locomotive ZTL-1-type automatic parking devices, which give traffic safety has brought some protection, but also to the maintenance work has added new content. We found in the overhaul, the control box and the alarm box printed circuit board as long as more welding repair twice, the above attached circuit will be off the substrate. The damage to this board brought great trouble to the maintenance work. The reason is that the attachment area of ​​the circuit and the substrate is too narrow, the area around the solder joint is small, and the heat is released