48
elna 9900
Replacing the Timing Belt
1. Remove the spool stand, static head right cover, right
cover and left cover (see pages 4 – 6).
2. Remove the 2 setscrews (A) and the pointer.
3. Remove the 3 setscrews (B) and CPU board.
4. Remove the motor belt (see page 50).
5. Loosen the 2 setscrews (C) and remove the idler.
6. Replace the timing belt.
7. Attach the parts removed in steps and 5.
8. Adjust the timing belt tension (see the previous
page).
9. Check the following items and adjust them if
necessary.
• Needle bar lowest position
• Hook timing
• Thread cutter timing
10.Attach the parts removed in steps 1 – 3.
Setscrews (A)
Pointer
CPU board
Setscrews (B)
Timing belt
Idler
Setscrews (C)
Summary of Contents for 9900 - LEAFLET
Page 1: ...SERVICE MANUAL 9900 ...
