Filter
Top Products
Guardian Telecom Inc.
Installation and Operation
SCR Series
Page 7
Field Repairs
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.
See: Replacement Parts
• Disconnect the telephone from Tip and Ring power supplied by the PABX
or central office before attempting to make repairs.
• Carefully remove the front cover assembly and separate from the housing
by disconnecting the harness plugs. NOTE that the electronics are
attached to the front plate.
• Perform the necessary repairs or adjustments.
See: Figure 3 -
Installation SCR-11 &
Figure 4 - Installation
SCR-41
• Carefully replace the front plate and install all eight 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.
See: Figure 3 -
Installation SCR-11 &
Figure 4 - Installation
SCR-41
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.