1 Improper adjustment (adjust FM three passengers)
2 Needle bent (with hook)
3 Needle tip is too long (adjust the handle grip)
4 Frequency is too low (adjust FM gong wire)
5 The voltage is too low (adjust the power supply)
1 Defective contacts
2 Improper adjustment
3 Machine is overheating (rest for a few minutes)
4 Power cord contacts are dirty
5 Voltage is too low
