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故障现象磁带不能推入带仓(带仓不让磁带进入)。如果手摇齿轮可将磁带送进带仓,可以进行各种操作,但工作几十秒后机器自行停止工作。按出盒键可将磁带弹出,但仍无法让磁带正常进入带企。检查分析当用手摇带仓齿轮送磁带入仓后,发不论何种操作磁带均以倒转(REW)形式运行,始终不能正向运行,而显示屏指示符号正确无误。我们从末级向前级检查,依次检查电机、驱动电路、控制信号。检查结果发现,主导轴电机组件的插座控制信号不对,PG1M的脚6反转控制端子始终有1.25～3V的电压。正常情况时,此端子电压值为0V,进行倒带时反转控制信号到来时才会有约4.7V电压出现。显然,此处存在问题。松开PG1M插头,电压
Symptom Tape can not be pushed into the tape cartridge (tape cartridge does not allow tape to enter). If the crank gear can tape into the warehouse, you can carry out a variety of operations, but after tens of seconds work machine to stop working on their own. Press the eject button to eject the cartridge, but still can not make the cartridge enter the carton normally. Inspection and Analysis When a tape cassette is delivered by hand with a tape carrier, no matter what type of tape is operated in reverse (REW) mode, the tape can not be operated in the forward direction and the indicator on the screen is correct. We check from the last stage to the previous level, followed by checking the motor, drive circuit, control signal. Inspection results found that the main shaft motor components socket control signal wrong, PG1M pin 6 inversion control terminal always has a voltage of 1.25 ~ 3V. Under normal circumstances, this terminal voltage value is 0V, reversal control signal when rewinding will be about 4.7V voltage appears. Obviously there is a problem here. Release PG1M plug, voltage