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9. Talk to a person at another station and
However, this type of set should be inspected and
determine if transmission and reception quality
routine tests should be performed as described in the
is satisfactory. Check that sidetone is reduced
following paragraphs.
so as not to interfere with normal conversation.
10. Ask a person at another station to call you back
following operations should be performed during a
so you can check the ringing level of the set
routine inspection of the type G (version 1) telephone
and to see that ringing stops when the handset
is removed from the handset holder.
1. Inspect the handset for broken or loose
When a preventive maintenance check reveals a
transmitter or receiver caps.
malfunction in the telephone set, some form of correc-
2. Check the handset cord for wear. Replace
tive action is required.
worn, frayed, or noisy cords. To check for a
noisy cord, roll the cord back and forth
Corrective Maintenance
between your hands while listening for a
clicking or cracking noise in the receiver.
Corrective maintenance of the type G (version 1)
telephone set includes adjustments and replacement
3. Inspect the handset holder for wear or
of failed components.
ADJUSTMENTS.-- There are three adjustments
4. Check the handset retaining mechanism for
on the type G (version 1) telephone set: the dial
positive action on release and lock functions.
illumination lamp intensity adjustment, the ringer
adjustment, and the dial speed adjustment.
5. Inspect the hookswitch lever for signs of wear.
Depress the lever and check for positive
Dial Illumination Lamp Intensity.-- The
outward movement of the lever on the release.
brightness of this lamp is controlled by the dial
illumination dimmer control. This control is accessed
PERFORMANCE TEST.-- The following
through a hole in the front panel and is adjusted with
operations should be performed when conducting
a screwdriver. You should rotate the control in a
performance tests of the type G (version 1) telephone
clockwise direction to brighten the lamp and in a
counterclockwise direction to dim the lamp.
1. Remove the handset and check for the dial
Ringer.-- This adjustment can be made while the
telephone set is on line or off line. For on-line
2. Check to see that the dial illumination lamp is
adjustment, remove the set from its enclosure and
lit, and rotate the dial dimmer control to see that
have someone call the set number from another
lamp intensity varies.
station. While the ringer is sounding, rotate the ringer
adjustment control in the appropriate direction to
3. Replace the handset in its holder to see if the
obtain the desired ringing level.
illumination lamp goes out.
For off-line adjustment, you will need two clip
4. Remove the handset and wait 30 seconds for
leads and a ringing voltage supply (75 volts at 20 Hz).
the howler tone.
Remove the telephone set from its enclosure and
5. Depress the hookswitch and release it to regain
disconnect the terminal wires. Using the clip leads,
the dial tone.
connect the ringing voltage supply leads to the
terminals of the grey and black leads. The ringer
6. Dial 0 and check to see if the dial returns to its
should sound. Rotate the ringer adjustment control in
normal position in approximately 1 second.
the appropriate direction to obtain the desired ringing
level. Disconnect the ringing voltage supply from the
7. Listen for unwanted clicking (dial pulses) in
terminals of the grey and black leads.
the receiver unit.
Dial Speed.-- The bottom hook on the dial
8. Dial a number and listen for the ringback tone
tension spring is attached to one of three tabs on the
in the receiver unit.

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