ETS2228 Maintenance Manual
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Page 32, Total 43
3
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Key-press fault maintenance procedure
Figure 13 Key-press fault maintenance procedure
YES
YES
YES
YES
power-on and startup
Does LCD respond after
the key is pressed?
Check if keys are reliably connected with
the keypad and remove faults.
End
NO
Doed LCD show value of
the key pressed?
Does the keypad respond to
data corrrectly?
Replace the keypad or the mechenical part
upper-lid on the fixed station.
NO
NO
Check inter-board connection power
and replace the fault cable.
YES
YES
