(8) Transfer the test receiver lead from terminal L2 to L1 and test at switch contact B,
terminal L2, and the tip side of the line at the connecting block. Remove the block from contacts B-C.
(9) Viewed from the dial mounting end of the base place, switch contact A is the nearest
contact to the observer. Switch contact A, with its associated GY lead, serves no useful purpose in
individual line service.
c. Transmitter Circuit, (Dial).
(1) These tests differ from those outlined in b above in that a test at terminal F is necessary
before the test at the RR terminal.
(2) If a click is heard on the test at terminal F and not at RR, remove the screws that fasten
the dial protective housing and those that fasten the dial spring block to the dial. Remove the housing
and lift the spring away from the dial just enough to allow tests at the spring contacts. Test at the dial
contact terminal on which the BLU lead is connected and then at the contact terminal on which the GRN
lead is connected.
(3) Reassemble the dial components with the tip of the pawl finger in the position and with
the protective housing slot properly fitted to the dial spring block
d. Receiver Circuit, Manual and Dial.
(1) Block switch contacts B-C to prevent them from closing when the switch is in the
operated position.
(2) Remove the transmitter cap and the transmitter element from the plastic cup.
(3) Remove the receiver cap and the receiver unit from the handset. Do not disconnect the
WH leads at the receiver unit terminals.
(4) Disconnect the WH handset cord lead at the terminal R.
(5) Connect one lead of the test receiver to terminal L2; with the other lead, test at the end of
the WH wire which is disconnected from terminal R, at both terminals at the receiver unit, at terminal
GN, and at terminal RR.
(6) When continuity is lost through failure of any component in the handset cord or the
receiver unit, replace the cord or the unit as required.
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