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Avaya Inc.
Installation and Operation
Model EA401
Page 9
Fuse Replacement
• Disconnect the telephone from tip and ring power supplied by the PABX or
central office before attempting to replace the fuse.
See: Figure 5 - Fuse
Replacement
• Remove the 1/2” NPT close up plug (item A) with a 1/4” Allen key.
• Remove fuse holder cap (item B) with a flat blade screwdriver. Rotate fuse
holder cap 1/4 turn counterclockwise (to the left) to remove.
• Remove fuse (item C) from the cap and insert replacement fuse.
WARNING!
• Replace only with a 0.25 amp 2AG fuse. Failure to do so will void safety
approval and warranties and may create an explosion hazard.
• With fuse mounted in the cap, re-install in the fuse holder with a flat blade
screwdriver and rotate 1/4 turn clockwise (to the right) to lock in position.
• Screw the 1/2” NPT close-up plug into housing with a minimum of five full
threads of engagement.
ATTENTION!
• CSA & UL standards require five full threads of engagement for the close-up
plug.
NOTES
• A field replaceable fuse is available on EA401 models manufactured after
Jan. 1, 1997.
• 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 should not be connected to 120 volts AC.
Figure 5 - Fuse Replacement
A
B
C
1012 4339 A
Industry Canada
Industrie C anada
WARNING
FIELD REPAIR NOT POSSIBLE. FO R SERVICE RETURN T O FACTORY. TO PREVENT
IGNITION OF HAZARDOUS ATMOSPHERE, DISCONNECT FROM THE SUPPLY CIRCUIT
BEFORE OPENING OR REPLACING FUSE. KEEP TIGHTLY CLOSED WHEN CIRCUITS
ARE ALIVE. ALL CO NDUIT RUNS MUST BE SEA LED WITHIN 18 INCHES (450 mm) OF
THIS ENCLOSU RE. BREAKING OF REAR BOLT SEALS VOID S MANUFACTURER'S
WARRANTY. SUBST ITUTION OF COMPONENTS MAY IMPA IR INTRINSIC SAFETY.
ATTENTION
CET APPAREI L NE PEUT ETRE RE PARE A PIED D'OEU VRE. NE PAS L'OUVRIR.
LES BOULONS DOI VENT ETRE BIEN SERRES DEBRANCHE LE TELEPHONE
AVANT LE REMPLACEM ENT DU FUSIBLE. RETOURNER L'APP AREIL A L'USINE
POUR LE DEPANNA GE. LE FAIT DE BRISER LE SCEAU DU FABRICANT A
L'ARRIERE DE L'AP PAREIL ANNUELE LA GUARANTIE DU FABRI CANT.