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Troubleshooting
11.19 LCD or LED Key(s) Inoperative
If there is no response when pressing the LCD or LED key(s):
1. For LCD keys only. Keypad cable connections are loose. Check
the connections at J1 on the Main Printed Circuit Board and J1 on
the Keypad PCB. See Chapter 5, Section 6.0.
Notes:
NOTE
2. For LCD or LED keys.
inoperative, test that key for operation.
DIAGNOSTICS menu (see your Service Menu chart) and press
the DOWN ARROW to go to:
Each of the keys will beep when pressed to test circuitry. If the
key does not beep when pressed, turn the plotter off and then turn
it on again so that the plotter resets.
KEYPAD test again.
4-62
For Step 2 below:
1. If one of the arrow keys is the key which is not responding,
use the other arrow key to scroll through the menus in order
to reach the DIAGNOSTICS KEYPAD display.
2. If the MENU key is not responding, turn off the plotter and
then turn it on again so that the display will be at the MAIN
MENU, PRINT MODE display. You will then be able to scroll
to the DIAGNOSTICS KEYPAD display.
3. If the SELECT key is not responding, you will not be able to
scroll to the DIAGNOSTICS KEYPAD display to test the
circuitry. Turn off the plotter and then turn it on again. If it
still does not respond, follow the instructions in Step 2.a.
below.
DIAGNOSTICS
KEYPAD
If a particular key appears to be
Go to the SERVICE
Try the DIAGNOSTICS
CADJET 2
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