Turbo Chef Technologies 2020 manual Key is pressed?, Correct wiring, Power?, Check wiring from

Models: 2020

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3 6 T RO U B L E S H O OT I N G

Troubleshooting:

No Display - Screen is Blank

YES

Does the keypad beep when a

key is pressed?

 

Replace the fuses (page A-7). NO

NO

Is the 24 VDC power supply receiving

Is wiring from the control board to the display (including the ribbon cable) OK?

YES

NO

Correct wiring.

If cable is damaged, replace it.

Replace the power supply (page A-8).

NO

power?

YES

Is the power supply output 24 VDC?

YES

Is 5 VDC present on pin 1 of the J3 connector? (page 39)

NO

Replace the I/O con- trol board (page A-8).

Is the control board receiving correct VDC (pages 37-40)?

 

YES

 

 

 

 

 

NO

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check wiring from the

 

 

 

 

 

Verify 5 VDC is present

Replace the display and

 

power supply to the control

 

 

 

 

 

on pin 1 of the J3

ribbon cable.

 

 

 

 

 

 

 

board. Correct wiring if

 

 

 

 

 

connector (page 39). If

 

 

 

 

 

 

(page A-8)

 

 

 

 

 

 

 

necessary (pages 37-40).

 

 

 

 

 

not, replace the control

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

board (page A-8).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Troubleshooting:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No Keypad Input

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Is the keypad cable properly connected

 

YES

 

 

 

to the control board?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace the keypad (page A-8).

If the problem persists, or if beeps occur when buttons are pressed but commands do not regis- ter on the display, replace the control board (page A-8).

NO

Correct wiring.

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Turbo Chef Technologies 2020 manual Key is pressed?, Correct wiring, Power?, Check wiring from, On pin 1 of the J3

2020 specifications

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