2
Wiper error when turning on the machine or after a trim and the
wiper extended caught the thread and retracted all the way
•
Upper arm cushion is cracked; missing or the screw has broken off
causing the solenoid sensor plate to be past the sensor. (See Wiper
Assembly Parts Breakdown)
•
Wiper solenoid arm setscrews on the solenoid are loose or missing. (See
Wiper Assembly Parts Breakdown)
•
Sensor needs adjustment or is no good. (See checking solenoid sensor
alignment.)
Wiper will not operate at all
•
Blown fuse on power supply circuit board. (Refer to Instruction Manual)
•
Wiper solenoid is defective. (See checking the wiper solenoid)
•
Circuit board is bad. (See checking the voltage to the wiper solenoid)
Wiper only moves a little
•
Wiper solenoid arm screws are loose or missing. (See Wiper Assembly
Parts Breakdown)
•
Nut on positioning spacer, B is either loose or missing. (See Wiper
Assembly Parts Breakdown)
•
Thread presser base misadjusted or bent. (See checking thread presser
base and cover alignment)
•
Thread guide solenoid base needs adjusting. (See checking thread guide
solenoid base)
•
A magic tape in thread presser base is either missing or damaged. (See
Wiper Assembly Parts Breakdown)
•
Upper thread guide hook is bent. (See Wiper Assembly Parts
Breakdown)
•
Wiper holder plate is bent or not adjusted correctly. (See checking thread
presser base and cover alignment)
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