User's Manual

BSX Isolated Audio Entry System
PD-142 Issue 1 Installation and Operating Manual Page 20 of 32
Troubleshooting
Common Faults
A very high percentage of calls to our technical support number, regarding new
installations, are resolved to faulty wiring. The reasons for these are various: -
Broken cores, especially short links, sometimes broken inside the insulation!
Connectors clamped onto the insulation instead of copper.
Wire in the wrong side of a rising clamp connection, the clamps need to be unscrewed
far enough to stop the wire going “underneath”.
Shorts or opens due to cables having been stapled or nailed through.
A common fault is wiring a connector left to right instead of right to left, or one or more
twisted pairs the wrong way round.
Tip. The heads of screws on connectors are not a reliable means of making a connection
with a meter, try pushing the probe into the wire entry point.
Preliminary Checks
Before proceeding with the following sections on troubleshooting please ensure that the
controller PCB(‘s) are correctly configured for the model of BSX in use:
Model
Controller PCB
DIP SW1-5
BSX 8 (8 Way 1 Door)
BSX2 PCB (1 only)
OFF
BSX16 (16 Way 1 Door)
Door PCB (Phones 1-8)
OFF
Expansion PCB (Phones 9-16)
ON
BSX 8-2 (8 Way 2 Door)
BSX16-2 (16 Way 2 Door)
Door 1 PCB (Phones 1-8)
OFF
Door 2 PCB (Phones 9-16)
ON