ADJUSTMENT OF +5 V POWER SUPPLY 1A3/1 A4 PS1

TM 11-6625-2884-30/NAVAIR 16-35TS3615-2

ADJUSTMENT OF +5 V POWER SUPPLY 1A3/1 A4 PS1

To adjust +5 V Power Supply 1A3/1A4 PS1, perform the following:

Remove RF modulation assembly from bench test set in accordance with

paragraph 3-32a. Set the RF modulation assembly upside down on the test

bench. Connect power cord to an energized 115 V ac 60 Hz source.

Check that front pane? POWER lamp illuminates.

If lamp does not light, check that front

panel circuit breaker on the RF modulation

assembly has not been tripped.

c. Connect the V lead of the DMM to the +5 V test point (1) and the COM

lead to chassis ground.

Adjust CR1 (2) control fully clockwise.

e. Using screwdriver, rotate the PS1 +5 V ADJ control (3) until DMM indicates

+5.0 v.

Adjust CR1 control (2) counterclockwise while observing DMM. When DMM

reading drops to less than 2 volts, stop adjustment.

Adjust CR1 control (2) 1/2 turn clockwise.

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