Flowchart A-17. Unit Will Not Respond To Any Function Switches - Wayne Vista Series Service

YES
YES

FLOWCHART A-17. UNIT WILL NOT RESPOND TO ANY FUNCTION SWITCHES

November 1992
Sale display on unit
will not respond to
any function switches.
Defective switches
check with VOM
for continuity
when switch is
Do switches
check good?
YES
Blown fuse on
Is the cash/credit
problem interface board.
corrected? Replace as
necessary.
NO
Defective wiring to
Is the
switches; check all
problem
wires; repair or
corrected?
replace as needed.
NO
Defective cash/credit
interface board.
Replace as
necessary.
Is the
problem
corrected?
Replace the
computer.
END
on.
Replace the switches.
NO
YES
NO
Part No. 917543 Rev. A
89