Guardian Telecom Inc.
Installation and Operation
Model
Field Repairs & Adjustments
Field repairs may only be carried out by qualified technicians using OEM parts. Substitution of parts voids warranty and may pose a hazard to users of the equipment.
•Disconnect the telephone from Tip and Ring power supplied by the PABX or central office before attempting repairs.
•Loosen the five captive screws in the faceplate and swing the faceplate to the left. If the set is on a vertical surface the faceplate will stay open like a book in this position. Take care not to disturb the internal wiring.
•Perform the necessary repairs or adjustments.
•Carefully replace the front plate and install all five screws. Do not over tighten the cover screws, there is a flexible gasket between the cover and the body. Excessive tightening of the screws deforms the gasket and reduces the weather resistance of the set.
Fuse Replacement
•Remove the old fuse by pushing in the end cap of the fuse holder and turning counterclockwise to open. Insert a new 0.25 amp, 250Volt, 3AG fast blow fuse and close the fuse holder.
WARNING!
•Replace only with a 0.25 amp 250V 3AG fast blow fuse. Failure to do so will void the warranty.
•If, on reconnecting power, the fuse fails, check the telephone system wiring. The fuse protects the Tip and Ring line from the telephone system. It is usually powered at 48 volts DC and must not be connected to 120 volts AC.
See: Replacement Parts
See: Figure 4 - Fuse Replacement
Note: Ensure that connections are secure before replacing faceplate.
FUSE
0.25 AMP .3AG
FAST BLOW
GROUND CONNECTION
GROUND
TIP & RING CONNECTION
Figure 4 - Fuse Replacement
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