Guardian Telecom
Installation and Operation
HDE-VoIP Series Telephones
Page 22
15. 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: 12 Replacement
Parts
Disconnect the telephone IP Cable and Aux Power if necessary.
Carefully remove the front cover assembly and separate from the housing by disconnecting the
harness plugs. NOTE that the handset and all electronics are attached to the front plate.
Perform the necessary repairs or adjustments.
Carefully replace the front plate and install all 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.
Tip: Torque screws to
2.5 in/lbs (0.28 Nm).
Ringer Speaker Replacement
Unplug the speaker connector from the main board.
Remove the screws that hold the speaker cap to get access to the speaker.
Install the new speaker and gasket.
Reconnect the speaker connector to the main board.
Main Circuit Board Replacement
Label any wiring attached to the circuit board. Disconnect wiring and ribbon cable.
Remove the six screws holding the circuit board in place. Carefully remove the board.
Switch Contact Block Replacement
Disconnect the two wires from the switch block that connect it to the circuit board.
Remove the retaining screw and lift off the switch block.
Position the new switch block, tighten the retaining screw and re-connect the wiring.
Pushbutton Replacement
Remove the switch block as above.
To disconnect the pushbutton assembly loosen the two retaining screws and rotate the base
while holding the metal ring.
Reassembly is the reverse of the disassembly.
