Use and Care Guide

5
Maintenance
To locate a short circuit: Open one side of the
telephone line and place the test set in the loop — one
lead to each side of the opened line. On the CO side of
the fault, a loud click will be heard. On the field side of
the fault, no click will be heard.
To locate an open circuit: Bridge the test set across the
circuit line — one test lead on tip, the other on ring.
Moving away from the CO, the fault is at the point
where the loud click disappears.
To verify continuity: Place one of the line leads on a
local ground and the other on the conductor in
question. On a good Ring conductor, a click will be
heard. On a good Tip conductor, an inductive hum will
be heard (due to the difference in ground potential
between the CO ground and the local ground).
WWarning
When testing circuits close to the battery
source, the clicks may be loud enough to
hurt your ear if the receiver is held too
tightly against the ear. The TS19 is designed
to rest comfortably on the shoulder with the
receiver away from the ear. It should be
used in this position when listening for
clicks.
Maintenance
WXWarning
Disconnect clips from any metallic
connections before performing any
maintenance. Read all instructions
completely and understand possible hazards
to end user if not performed by authorized
service personnel.
WCaution
Do not use CRC Cable Clean
®
or any similar
chlorinated solvent on the TS19. Doing so
will damage the TS19 Test Telephone.
Belt Clip Replacement
The ordering number for the replacement belt clip is
P3218249. To replace the belt clip assembly:
1 Place the TS19 on a firm and level working surface
with the keypad up.
2 Remove the two screws which secure the belt clip
to the TS19’s plastic grip (one screw also secures
the strain relief cord). Remove and discard the old
belt clip.
3 Position the new belt clip so that its screw
mounting holes line up with the mounting holes
in the TS19. Insert the screws and tighten. Make
sure the strain relief for the cord is properly
reinstalled.
Line Cord Replacement
To replace the line cord:
WXWarning
Disconnect from telephone network when
replacing line cord.
1 Place the TS19 on a firm and level working surface
with the keypad up.
2 Remove the screw and the strain relief cord.
3 Depress the plastic tang on the modular plug of
the line cord where it enters the TS19’s modular
jack and gently pull the plug and cord free from
the jack. Discard the cord.
4 Insert the modular plug of the replacement cord
into the TS19’s modular jack and listen for a click.
The click indicates that the plug has “locked” into
position with its tang properly engaged to prevent
accidental removal.
5 Reinstall the screw for the strain relief cord.