Unable to start

 Probable causes

Actions

 Belt is loose or broken
 Tighten or replace belt
 Fuse for power or circuit blown out
 Check ampere capacity and replace fuse
 Needle position signal or one-rotation signal is not detected
 Adjust needle position with wrench so that needle position LED come on
 Frame limit switch is actuated
 Move frame to appropriate position
 Abnormality warning lamp in drive unit is on
 Clean air filter
 Incomplete contact of connectors in control box
 Securely couple connectors
 Incomplete contact of connectors in main shaft drive motor control box
 Securely couple connectors
Color change incorrect

Probable causes

Actions
 Incorrect stop position

 Manually set main shaft to fixed position
 Needle position and one-rotation signals are not detected
 Adjust needle position with wrench so that stop position indicating lamp comes on
 Incorrect needle bar position
 Set position correctly
 Incorrect take-up lever position
Adjust take-up lever so that it coincides with others in position at fixed position
Relay or fuse for color change defective
Replace relay or fuse
　　Upper thread defective incomplete

 Probable causes

Actions
Thread take-up spring incomplete contact
 Securely couple connectors
Tension base connector incomplete contact
Securely couple connectors
Upper thread breakage timing contact incomplete
Clean and adjust the upper thread breakage timing contact
　　Jump incomplete

Probable causes

Actions

Connector incomplete contact Securely couple connectors
Fuse for jump circuit defective Replace fuse
Jump solenoid defective Replace solenoid
Needle bar driving block wear Replace needle bar driving block
　　Deformed design

Probable causes

Actions

Frame drive belt is too tight Loosen
Frame guide rails are clogged with foreign materials Clean the rails
Frame drive circuit defective Replace
Memory plate defective Replace
Overall weight of the frame is excessive Decrease R, P. M