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Audio International,
Inc.
8.0
Troubleshooting
8.1
General Troubleshooting Procedures
Many problems can be isolated with the following general techniques:
• To verify power to the unit, recheck +28 VDC power is applied to the
proper pins on the unit. Use a voltmeter to verify correct level.
• Reset by removing power from the unit for at least one minute and
reapply power. Verify the problem still exists.
• Recheck all connections to the unit for security. Check all harness
runs for possible pinching.
accuracy.
• To check data bus integrity, utilizing a voltmeter, oscilloscope, or other
voltage instrument, verify proper input voltage on the data bus pins.
• The RS-485 data bus is a bi-directional bus that does not have a 'bus
controller'. The bus uses a differential digital signal that will transmit
only when commands are entered via switch selection or other system
synchronizing commands. The "A" leg of the bus is HI and the "B" leg
LOW.
Document # 540204, Rev IR, 1/2001
RCP-201-01-x Installation & Operation Manual
Recheck all pinouts for application
Page 13 of 19
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Table of Contents
Troubleshooting
