Guardian Telecom Inc.
Installation and Operation
Model PSCU
Page 8
Installing the PSCU
Inspect the product for shipping damage.
Follow all appropriate electrical codes and use only approved electrical
fittings for the installation.
Tip: If the product is
damaged, notify the
carrier immediately.
Place the PSCU in the desired location.
Ensure that none of the electrical circuits are live.
Wire up to the Guardian System Rack.
Adjust the control console speaker volume potentiometer (R28) to the
desired volume level.
Adjust high and low frequency cut off filter potentiometers to desired levels.
The high frequency filter (potentiometer R31) can reduce any possible noise
on the PSCU monitor speaker. The low frequency filter (potentiometer R22)
can help reduce any possible distortion to the PSCU monitor speaker.
Test all input/outputs and audio according to system option configuration.
See: Figure 4 - Circuit
Board Features
Field Repairs & Adjustments
This device has no user serviceable internal components; the only maintenance
possible is replacement of the fuse.
See: Figure 4 - Circuit
Board Features
Fuse Replacement
Remove the top deck of the control console to access the fuse, which is
mounted on the PCB. Replace the blown fuse with new 0.5 amp 250V
2AG fast blow fuse. Re-assemble the top deck to the base and re-test.
WARNING!
Replace only with a 0.5 amp 250V 2AG fast blow fuse. Failure to do so will
void the warranty.
If the fuse fails again on reconnecting power, check the system wiring.
