Figure 2-2. Power Supply PP-3940-A/G, Front Panel Controls an Indicators.

TM 11-4120-247-14-1

c. See that all terminal board screws are present and

port the damage on DD Form 6 (para 1-3).

links are tightly connected between terminals 1 and 2,

b. See that the equipment is complete as listed on

3 and 4, 5 and 6, 8 and 9, and 10 and 11 on rear

the packing slip. If- a packing slip is not available,

terminal board (fig. 2-3).

check the equipment against the components data

d. The power supply is a bench-type unit and needs

given in paragraph 1-6. Report all discrepancies in ac-

no installation.

cordance with TM 38-750. Shortage of a minor

assembly or part that does not affect proper function-

2-4. Preparation for Use

ing of the equipment should not prevent use of the

a. Set POWER switch S1 to off (fig. 2-2).

equipment.

c. If the equipment has been used or reconditioned,

WARNING

The input power is applied by a line cord with

see whether it has been changed by a modification

an ac three-prong plug. Connection of the line

work order (MWO). If the equipment has been modi-

fied, the MWO number will appear. on the front panel

cord to a 3-wire ac power source grounds the

equipment. If 3-wire ac power is not avail-

near the nomenclature plate. If modified, see that any

operational instruction changes resulting from the

able, an adapter can be used. The user should

modification have been entered in the equipment

make sure that the extra wire (coded green)

coming out from the adapter is solidly

manual.

NOTE

grounded to the ac power source wiring

system, preferably soldered.

Current MWO's applicable to the equipment

b. Plug the power cord connector into a 115-volt ac,

are listed in DA Pam 310-7.

60-Hertz (Hz) power source.

2-3. Installation

c. Make the necessary load connections to the bind-

ing posts as specified by-the local requirement.

a. All semiconductors, the fuse, terminal board

links, and indicator lamps are installed in the power

2-5. Terminal Board Links

supply when the equipment is shipped.

b. See that a 5.0-ampere fuse is installed in the fuse

Terminal board links connect portions of the interior

holder at the rear of power supply (fig, 2-3).

power supply circuitry. When the power supply is used

Figure 2-2. Power Supply PP-3940-A/G, Front Panel Controls an Indicators.

2-2

Change 1