HappyJapan HCH-701-30, Maintenance Manual

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1 45
Trouble shooting(Malfunction of thread break detection)
7-2-7
Trouble Factor Cause of trouble and measure
Page
Malfunction
of Mechanical
1. Trouble in turning detection roller.
thread break 1-1 Clean roller shaft holder.
detection 1-2 Check if slit disc doesn't contacts sensor. 4-2-2
(empty 1-3 Clean sensor if dust gets stuck.
detection) 1-4 Check if cord doesn't contacts slit disc.
1-5 Check Disconnection of cable.
2. Check circuit board.
2-1 Replace of LCD-CE-U board ass'y. 4-1-1
2-2 Replace of TC 7 board.
3. Sometimes needle bar doesn’t work when start sewing.
3-1 Replace if cushion has been decrepit.
3-2 Replace of needle bar driver. 3-2-4
3-3 Adjust of jump device position. 3-2-5
3-5 Replace of Jump device.
3-6 Adjust position of Photo interrupter on Thread catcher.
Operator 1. No thread is passed through detecting roller.
1-1 Pass thread properly.
(4-7)
2. Is thread tension proper?
2-1 Observing sewing rhythm, adjust thread tension properly.
(4-5) (8-1)
3. Is proper detection sensitivity of thread cut selected? (5-1)
3-1
Select detection sensitivity according to sewing condition of thread and cloth etc.
Environment
1. Is there any device to yield lints etc. around the embroidery.
1-1 Keep it off the embroidery machine.
1-2 Move the embroidery machine to other place.
2.
Doesn't thread go beyond control by wind? (thread comes off from needle hole by loosing)
(2-6)
2-1 Keep thread off wind.
2-2 Move the embroidery machine to other place.
Thread & 1. Isn't silicone agent used on thread?
Cloth (Thread slips at detecting roller part due to adhere of silicone.)
1-1 Clean silicone agent attached to detecting roller groove.
( ) ---Reference instruction book