THE CONTROL SYSTEM | 47 |
Troubleshooting:
No Display – Screen is Blank
YES
Does the Control beep when
a key is pressed?
NO
Is wiring from the
I/O Control Board to
Display OK?
YES
Is J3 Connector
receiving 5 VDC?
(Figure 62, page 64)
YES
Replace Display.
(page 34)
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| Replace Fuses. |
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| Correct wiring. |
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NO |
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| If ribbon cable is |
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| damaged, replace |
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| with P/N 103024. |
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| NO |
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| Replace Power Supply. |
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| Replace I/O Control |
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NO |
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| Board. (page 39) |
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| NO |
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| Check wiring from |
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| Power Supply to I/O |
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| Control Board. Correct |
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| wiring if necessary. |
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Is the Power Supply
receiving power?
YES
Is the Power Supply output correct VDC? (see page 2 for electrical specifications.)
YES
Is I/O Control Board receiving correct VDC?
Check voltage on D6 Diode on striped end (Figure 62, page 64 for schematic of the I/O Control Board)
YES
Verify 5 VDC is
present on J3
Connector. If not, replace I/O Control Board (page 39)
