TurboChef i3

44 TROUBLESHOOTING
NO
Troubleshooting:
No Display – Screen is Blank
YES
NO
Does the keypad beep when
a key is pressed?
Is wiring from the
control board to the
display OK?
Is pin 1 on the J7
connector receiving 5
VDC? (see schematic,
page 49)
NO
YES
YES
Replace the display.
NO
NO
YES
Is the power supply
output 24 VDC?
NO
YES
YES
Verify 5 VDC is
present on pin 1 of the
J7 connector. If not,
replace the control
board.
Is the control board
receiving correct VDC?
Verify voltage on pin 2
of the J7 connector is
24 VDC (see
schematic, page 49).
Replace the fuses or
correct wiring.
Check wiring from the
power supply to the
control board. Correct
wiring if necessary.
Replace the control
board.
Correct wiring. If ribbon
cable is damaged, replace
the keypad.
Is the power supply
receiving power?
Replace the power
supply.