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例1 [机型]厦新VCD759(三盘机) [现象]激光头不读盘。 [分析与检查]该机的伺服板装在机芯架下,加载电机、选盘电机引线直接与伺服板连接,只有拆下伺服板、激光头(连升降架)与解码板连接线(扁数码线)才能进行检修,在开启电源后,还必须同时用手闭合SW1、SW2、SW3行程开关,否则激光头无聚焦和循
Example 1 [Model] Xiamen new VCD759 (three-disc machine) [phenomenon] laser head does not read the disk. [Analysis and Inspection] The machine servo board installed in the movement under the frame, loading the motor, the disk motor leads directly connected with the servo board, only remove the servo board, the laser head (lifting frame) and decoder board connection line Digital line) can be overhaul, after turning on the power, you must also manually close SW1, SW2, SW3 limit switch, or the laser head without focusing and circulation