14 — Troubleshooting
Notes
Rev 3-97
@ Crown
No: Proceed to question 3H.
Question 3H: Is an IQ-PSI the interface?
Yes: Replace the battery or use an AC adapter.
No: Proceed to question 3I.
Question 3I: Is an RS232 Switcher being used?
Yes: Try bypassing the switcher and connecting directly. Some smart switch-
ers are not compatible.
No: Reboot the processor of the component serving as system interface by
powering down the unit, waiting 30 seconds, then restoring power. If this
procedure does not take care of the problem try a different unit as system
interface. If that does not work or there is no other interface available contact
Crown.
Question 4: Does the software find all system components at Roll Call?
Yes: Proceed to question 5.
No: Proceed to question 4A.
Question 4A: Is the whole loop missing?
Yes: Proceed to question 4F.
No: Proceed to question 4B.
Question 4B: Are all components addressed properly?
Yes: Proceed to question 4C.
No: Remember that you may not have any two components of the same type
at the same address on the same loop and that addresses of 0 and 251-255
are not valid.
Question 4C: Does the software have valid OIF and DLL files for the component
that is missing?
Yes: Proceed to question 4D.
No: Load the proper files from disk or contact Crown to obtain the proper files.
Question 4D: Is power turned on at the missing component?
Yes: Proceed to question 4E.
No: Power the missing unit.
Question 4E: Is a mixer being used as system interface?
Yes: Remember that mixers should not be used as the interface in large
systems. You cannot use a mixer as an interface for IQ2 components.
No: Proceed to question 4F.
Question 4F: Is loop capacitance under 30 nF?
Yes: Proceed to question 4G.
No: Remember to add 60 pF per component to capacitance calculations. In
cases where total capacitance is marginal loop operation may be intermittent.
Question 4G: Is the loop wired properly?
Yes: Proceed to question 4H.
No: Verify all connections are properly made, no components have been
skipped, and that all connections observe proper polarity.
Question 4H: Is the system powered up?
Yes: Proceed to question 4I.
