Janome NH40 Service Manual page 26

Step and items
to check
08) Attach the foot control to the sewing
machine.
Foot control
Depress the foot control as far as it
goes, then release it.
If the result is correct condition, press
the reverse button to proceed the next
step.
If the result is defective condition,
press the needle up/down button to
proceed the next step.
09)
Not applicable
for this model
10)
Press the ring button (up) mark.
DC motor
If the result is correct condition, press
the reverse button to proceed the next
step.
If the result is defective condition,
press the needle up/down button to
proceed the next step.
11)
Not applicable
for this model
12)
Not applicable
for this model
Procedure
LCD displays "SC 08".
The foot control symbol appears when
the foot control is attached.
Buzzer sounds when the foot control is
deeply depressed.
Buzzer sounds when the foot control is
released.
LCD displays "SC 10".
Machine runs slow, then fast, and the
needle bar stops at its highest position.
Correct Condition
24
Defective Condition
The foot control symbol does
not appear.
Buzzer does not sound.
–REMEDY–
Replace the foot control.
Replace the machine socket.
Replace the circuit board A.
The machine motor does not
start.
The motor stops immediately.
The motor runs unstable.
–REMEDY–
Replace the DC motor.
Replace the circuit board A.