Front Keypad Display Inoperative - ENCAD CADJET 2 Service Manual

Troubleshooting

11.20 Front Keypad Display Inoperative

If there are no characters displayed on the Keypad Display, but other
plotter functions are correct, perform the following actions until the
problem is corrected.
1. Keypad Display cable connections are bad. Check the connection
at J1 of the MPCB. See Chapter 5, Section 6.0.
2. Try reprogramming the Flash EPROM. See Appendix A.
3. The Keypad Display has failed.
Chapter 5, Section 6.0.
4. The Main Printed Circuit Board circuitry has failed. Replace the
Main Printed Circuit Board (see Chapter 5, Section 4.3), and
reprogram the EPROM.
5. EPROM or Flash EPROM failure.
Chapter 5, Section 4.3.
6. The Display Cable may have been installed backwards. Check
the orientation of the flex fingers. See Chapter 5, Section 6.2.
4-64
Replace the Display.
Replace the MPCB.
CADJET 2
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