Gasboy CFN Series Diagnostic Manual - Manual (Page 427)

CFN Islander
12/26/02 13-59
KEY READ/RECEPTACLE PROBLEMS
Islander does not respond correctly to keys. Terminal communication is fine. When idle,
system displays shows idle message or broadcast messages (when messages are
loaded).
Possible Cause Checks Corrective Action
Bad key. Run several keys to see if
problem is consistent.
Perform Preventive
Maintenance below.
Replace key if problem
follows key. If possible, re-
encode key and retry.
Incorrect switch setting on
reader terminal CPU board. Check switch S2-6 on reader
terminal CPU board. Switch
S2-6 must be closed for keys
to be read. Correct switch settings if
needed.
Islander is not configured to
match key. Check the system
configuration to the key layout
information supplied with
system. Make configuration changes if
necessary.
Defective key receptacle
Defective Key I/F PCB
Defective reader terminal
CPU The DC signals between the
key receptacle, Key I/F PCB,
and reader terminal CPU
occur quickly and are best
viewed with an oscilloscope.
To eliminate lengthy
oscilloscope procedures,
follow the corrective actions. Replace key receptacle and
retest.
Replace Key I/F PCB and
retest.
Replace reader terminal CPU
and retest.
Preventive Maintenance
To prevent key read errors, perform the following preventive maintenance on the keys as needed:
clean the key's contacts using isopropyl alcohol and a toothbrush. Dip the toothbrush in the
alcohol and brush the contacts of the key until they are clean.