Corrective Maintenance

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.

TELEPHONE SET INSPECTION.-- The

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

set:

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.

chipping.

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

set:

counterclockwise direction to dim the lamp.

1. Remove the handset and check for the dial

tone.

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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