HappyJapan HCR3-1502, Maintenance Manual

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Trouble Factor Cause of trouble and measure Page
Upper thread
Mechanical
10.Check the needle bar moves when start sewing.
comes off 12-1 Adjust position to fix jump solenoid.
from needle 12-2 Replace needle bar driver. 4-1-1
hole 11. Is number of revolution proper when sewing started?
13-1 Make automatic speed setting. E4-3
12.Is height of pressure foot proper?
14-1 Adjust as specified. 4-1-4
Operator 1. Isn't thread tension too strong?
1-1 Weaken tension not to cause trouble in sewing rhythm. 2-9
2. Keen in cleaning thread cut device?
2-1 Clean bobbin thread holder regularly. ( 23-2 )
3. Is setting of bobbin thread proper? *
3-1 Pass thread on bobbin thread guide surely. 2-9
4. Is bobbin thread properly wound? *
4-1 Adjust tensile strength of bobbin winder and check holding plate. ( 4-4 )
4-2 Pull out bobbin thread to check if it comes out smoothly. 2-9
5. Is upper thread properly passed? ( 4-6, 4-7 )
5-1 Pass properly again. 2-9
6. Does thread cone stand properly? ( 4-6 )
6-1 Keep thread from hitting felt.
6-2 Stand vertically.
7. Is [Machine settings] properly set? ( 15-1 )
7-1 Select setting of length of TRD. Cut [Long].
7-2 Select setting of Quick start mode [No].
7-3 Select setting of STR. Lock stitch [Yes].
Thread & 1. Is thread used to suit embroidery? (thread twist, tender thread). 3-3
Cloth 1-1 Don't use too strongly twisted thread.
1-2 Twist of thread is to be left-wise.
1-3 Use tender thread.
1-4 Don't use thread with knot or uneven size.
Environment
1. Does wind let thread go beyond control? (outside wind, heater, and fan etc.)
1-1 Keep the embroidery machine off from wind.
Pattern 1. Is there stop sewing stitch for start sewing?
1-1 Modify pattern.
( ) ----- Reference instruction book