MAINTENANCE 155 



Remedy. Look for a loose connection where line connects with telephone set, 

 where line connects to protector, or at the ground. It is possible that the trouble may 

 be due to a poor or corroded splice in the line wire or to contact between the line wire 

 and trees, poles, or other lines. In the case of grounded lines be sure that the ground 

 at the telephone you are trying to call is in proper condition. Be sure that your own 

 ground is in the same condition. 



Trouble No. 5, Bell Local bell does not ring; can ring other bells all right. 



Cause. Broken wire or loose connection to ringer, ringer adjustment bad, or 

 coils open. 



Remedy. Look for a broken wire or loose connection in the wires coming from 

 the ringer. If the connection and wire are all right, see that the ringer is properly 

 adjusted. Make a test on your ringer coils to see that they have not been burned out 

 as previously described. If only a feeble ring is received from other stations or when 

 ringing your own bell, the trouble is most likely with the adjustment of the ringer 

 which has probably been tampered with. Occasionally the ringer magnet becomes 

 weakened and causes a similar result. 



Trouble No. 6, Bell Can ring other bells only feebly; receives a strong ring from 

 other stations. 



Cause. Weak magnets or bad connection in generator. 



Remedy. This may result from weakness of the permanent magnets of the 

 generator, but it is more likely due to a poor connection between the generator and the 

 line. If not in the wiring there may be faulty connection between the shaft of the 

 armature and the spring against which it presses when the generator is turned. This 

 contact must not be oiled. Oil at this point offers a high resistance that greatly 

 reduces the ringing current. 



Trouble No. 7, Bell Rings frequently with no apparent cause. 



Cause. Intermittent cross with foreign lines. 



Remedy. This trouble can only arise where the line is on the same poles as a 

 foreign telephone or telegraph line. If it makes a contact with such other wires by 

 swinging across them the bells will be rung but there will be no response. 



Trouble No. 8, Transmitter Can hear others all right but others cannot hear you. 



Cause. Loose connection or broken wire in primary circuit; carbon packed; 

 battery weak; speaker standing too far from transmitter. 



Remedy. Look for a loose connection or broken wire coming from the trans- 

 mitter battery, induction coil, or switch-hook. See if the connections to the induction 

 coil are all right. If this examination does not show anything wrong, thump the 

 underside of the transmitter lightly with the hand, as the carbon granules in the 

 transmitter may have become packed. If this fails to improve matters the trouble 

 may be due to an exhausted battery. 



If speech transmitted is indistinct with a scratching or grating noise, look for a 

 loose connection at the battery, induction coil, or in the fine wire connecting the 

 carbon of transmitter to the cord terminal. 



Trouble No. 9, Receiver Cannot hear others distinctly; others hear you all right. 

 Cause. Loose connection on receiver circuit; diaphragm bent or dirty. 



Remedy. Look for a loose connection or broken wire coming from the receiver, 

 switch-hook, or induction coil. Unscrew the ear-piece from the receiver and brush out 

 the inside and wipe off the diaphragm. Also brush off any particles that may have 

 collected on the magnets underneath the diaphragm. If the diaphragm is bent in, 

 turn it OTer.and replace the ear-piece. Screw this on firmly, but not very tightly. 



