Janome 4300QDC Service Manual page 25

Buzzer sounds after few seconds when the self-diagnostic test has been finished.
The test result has been determined.
The defective part number.
See page 23 to 25 "Steps
and items" section.
Turn the power switch off when the self-diagnostic test is finished.
to disPlay thE vErsion oF thE Program
Turn the power switch on while
simultaneously pressing needle
up/down button and thread cut-
ter button.
sElF-diagnostiC tEst
CorrECt:
Buzzer sounds and LCD displays "00"
dEFECtivE:
Caution buzzer sounds and LCD displays the defective part
number. Refer to page 19 to 21 and fix the defective part.
Press the needle up/down button within
the 1.5 seconds to enter the self-diag-
nostic mode.
The LCD will indicate "----".
23
Press the touch panel " 3"
to display the version of
the program.