论文部分内容阅读
故障现象:开机后,机内有齿轮“喀喀”打滑声,显示屏显示“00”。分析与检修:开盖检查,发现光头向内一直不停地移动,同时伴有齿轮“喀喀”的打滑声。据此怀疑微处理器HC3(CXP50116—702Q)未能检测到限位开关的闭合低电平信号所致。图1为该部分电路原理图,微处理器HC3的(53)脚为限位开关信号检测端,开关K为光头滑行位置开关。IC001(CXA1782)的(16)脚为滑行伺服电机控制信号输出端。该电路的工作原理是:开机后,微
Symptom: After power on, the machine has a gear “Titicaca” slipping sound, the display shows “00”. Analysis and Maintenance: Open lid inspection and found bald inward has been kept moving, accompanied by gear “Titicaca” slipping sound. Accordingly, it is suspected that the microprocessor HC3 (CXP50116-702Q) failed to detect the closed low signal of the limit switch. Figure 1 is the circuit diagram of the part, the microprocessor (53) pin HC3 is the limit switch signal detection terminal, the switch K is the bald slide position switch. IC001 (CXA1782) (16) feet for gliding servo motor control signal output. The working principle of the circuit is: after power on, micro