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ADCC1100
Appendix D: Troubleshooting
Problem
✗
No power to keyboard
✗
No response to keystrokes (power
verified)
✗
Keyboard responds to keystrokes on
some, but not all keys
✗
Cannot perform menu programming
✗
Display not visible
✗
Keyboard speaker not audible
✗
Cannot access main menus of CPU
Check List
✓
Check AC outlet
✓
Check wall transformer connections
✓
Check cable connections to keyboard and
keyboard matrix interface
✓
Measure transformer output at keyboard matrix
interface
✓
Check connection of keyboard matrix interface to
system controller's communication port
✓
Check baud rates for keyboard and system
controller
✓
Verify VCR/Monitor status
✓
Verify smart card privileges. Administrator or
supervisor privileges are required to perform
programming functions.
✓
Verify display brightness and contrast level
✓
Verify speaker enabled in keyboard menu
✓
Verify that keyboard is in program mode
✓
Verify that correct monitor is selected for menu
programming
✓
Verify CPU program monitor output is connected
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