Janome J30 Service Manual And Parts List page 24

STEP AND
PROCEDURE
ITEMS TO
CHECK
LCD displays "OK" or "NG",
13)
EEPROM depending on the EEPROM
condition.
If the result is correct condition,
press the start/stop button to
proceed the next step.
If the result is defective condition,
press the reverse stitch button to
proceed the next step.
SELF-DIAGNOSTIC TEST
CORRECT CONDITION
LCD displays "OK" when the
EEPROM is correct condition.
LCD displays "NG" when the
EEPROM is defective condition.
22
DEFECTIVE CONDITION
LCD displays "NG".
–REMEDY–
Replace the circuit board A.
"OK"
"NG"