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8. ELECTRICAL MECHANISM
131
BAS-311G, BAS-326G
Problem #12 Work clamp does not drop.
Cause Inspection/Remedy/Adjustment Replacement if a malfunction
1. Incorrect work clamp home
position adjustment
1) Adjust the home position while referring to
“7-20. Adjusting the home position”.
2) Check if the thread wiper or work clamp are
touching something else.
2. Incorrect mechanism adjustment Check if the movement of the work clamp arm is
stiff.
Work clamp arm assembly
Problem #13 TEST indicator does not illuminate when the TEST key is pressed.
Cause Inspection/Remedy/Adjustment Replacement if a malfunction
1. Malfunction of panel P.C. board
Check that connector P1 (PANEL) is inserted
into the main P.C. board, and that connector
CN2 (MAIN) is inserted into the panel P.C.
board.
Panel P.C. board
Panel harness
2. Malfunction of main P.C. board Replace the main P.C. board. Main P.C. board
Problem #14 The feed mechanism does not move one stitch at a time during test feed.
Cause Inspection/Remedy/Adjustment Replacement if a malfunction
1. Malfunction of foot switch or
cord
Refer to inspection #5.
2. Incorrect memory switch setting 1) Set memory switch No. 200 to OFF.
2) Set memory switch No. 252 to OFF.
Problem #15 Feed mechanism does not move fast during test feed.
Cause Inspection/Remedy/Adjustment Replacement if a malfunction
Malfunction of foot switch or cord Refer to inspection #5.
Problem #16 Feed mechanism does not follow program during test feed.
Cause Inspection/Remedy/Adjustment Replacement if a malfunction
Malfunction of foot switch or cord Refer to inspection #5.
Problem #17 Intermittent presser foot does not drop during sewing.
Cause Inspection/Remedy/Adjustment Replacement if a malfunction
1. If the presser foot does not
operate and [E300] is displayed,
there is a blown fuse.
Remove fuse F2 from the power supply motor
P.C. board and check the continuity.
OK if continuity
(If there is no continuity, carry out the inspections
in 2.)
Fuse
6A-250V