Happy HCS-1201-30, Maintenance Manual

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Trouble shooting(Off-registration of pattern)
7-2-4
Trouble Factor Cause of trouble and measure Page
Off-registration Operator 2. Is cloth properly stretched. (6-2) (7-5)
of pattern 2-1 Stretch properly.
3. Is thread tension proper? (4-5) (8-1)
3-1 Observing sewing rhythm, set thread tension properly.
4. Was the machine left for a long time in middle of sewing?
4-1 Try to finish sewing as soon as possible.
Environment
1. Is strength of table and floor enough? (2-4)
1-1 Check where to place the machine again.
1-2 Move to where floor is strong enough.
1-3 Use strong table to be able to endure vibration.
2. No problem in pulse motor driver by low power and voltage (variation)?
2-1 Supply rated voltage.
2-2 Use transformer.
2-3 Use stabilizer.
3. Is there no place where noise is generated near the machine?
3-1 Don't use the machine near where noise is generated.
4. Doesn't drive frame hit obstacle? (2-4)
4-1 Remove obstacle.
4-2 When useing cap frame, see not to hit table. (2-5)
Thread & 1. Not using shrinkable cloth? (4-3)
cloth 1-1 Use backing paper (consider number of sheets to use).
2. Isn't breakable cloth is used by thread tightening? (4-3)
2-1 Use backing paper (consider number of sheets to use).
3. Is proper backing paper used? (4-3)
3-1 Use backing paper to match cloth.
4. Isn't cloth (embroidery) too heavy?
4-1 Don't use extremely heavy cloth.
Pattern 1. Pattern data may be destroyed. (5-4) (5-6)
1-1 Read again.
1-2 Let new pattern read.
2. Memory pattern was destroyed. (5-4) (5-6)
2-1 Let new pattern read.
3. No problem in floppy disc or memory card?
3-1 Initialize and read again.
3-2 Prepare new floppy disc or memory card.
( ) ----- Reference instruction book