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5-2-1 Troubleshooting - Control Panel
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Pressing the select switch does not give beep sound and the indicator does not turn on.
YES
YES
NO
NO
Unselected indicator turns on.
※
When in an ERROR mode, that is, when "E" shows in the display, pressing any key is not valid.
Turn POWER OFF and start again.
Power S/W ON?
Turn Power S/W ON.
(All select switches are
valid only when the Power
S/W is ON.)
S/W contacts
in good
condition?
Defective contacts of
TACT S/W. Replace
PCB ASS`Y.
Replace detective
PCB ASS`Y
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