Power Supply Check

TB 11-6625-620-35-2

EL6625-620-35-2-TB-I

Figure 4-1. Printed circuit card assembly 1A2A15 (80047080), component locations.

4-2 and GRD (J2).

NOTE

b. Adjustments. No adjustments can be made.

The meter reads from 0 to 49.2 percent

4-3. Final Procedure. a. Reenergize and disconnect

nominal.

all equipment and reinsert boards to proper places.

b. Reinstall coverplate and cover to Test In-

(15) Adjust R15 of card 1A2A15 to halve the error

strument.

between the 25 percent 49.2 percent indications.

C. In accordance with TM 38-750, annotate and af-

NOTE

fix DA Label 80 (US Army Calibration System).

Perform the following power supply check

When the Test Instrument cannot be adjusted within

only if the preceding performance checks or

tolerance, annotate and affix red tag, DA Form 2417

adjustments could not be obtained.

(Unserviceable or Limited Use).

4-2. Power Supply Check. a. Performance Check.

Table

4-2.

Power

Supply

Measurement

(1) Turn Test Instrument POWER switch to OFF

Multimeter

and disconnect cables.

indications (dc voltage)

Test instrument

(2) Remove the Test Instrument protective cover.

Maximum

Minimum

connector (jacks)

Making sure that nothing is touching any electrical

components reconnect cables.

+14.25 . . . . .

+ 15.75

+15V (J1) . . . . . . . . . . . . . . . . . . . . . . . .

(3) Set POWER switch on Test Instrument either

-14.25 . . . . . . .

-15.75

-15V (J3) . . . . . . . . . . . . . . . . . . . . . . . . .

to 115V ON or 230V ON.

+9.50 . . . . . .

+ 10.50

-10V (J4) . . . . . . . . . . . . . . . . . . . . . . . . .

(4) Using multimeter, measure the voltage in-

-114.00 . . . . . .

-126.00

-lmV (J5) . . . . . . . . . . . . . . . . . . . . . . . .

dications at Test Instrument jacks as shown in table