Sectionalization Testing

TM 11-6625-549-14-1

output of the five voltage supplies. (See test points and

NOTE

voltages in paragraph 7-5.) If voltages are abnormal,

If 1 mc output registers on scope, the oscillator

check tubes, then components, paying particular

and amplifier stages are functioning properly.

attention to the metallic rectifier in the faulty circuit.

c. Divider Check.

b. Oscillator Check.

NOTE

(1) Remove tube V262 from socket.

Be sure oscillator and amplifier circuits are

NOTE

operating properly before checking the divider

This action removes the divider stages from the

stages.

oscillator and multiplier.

(1)

Check waveforms and test points a

(2)

Place oscilloscope probe into 1

described in paragraph 7-10. Any abnormal waveforms

MICROSECOND output jack and check for 1 mc output.

indicate a defective stage. Refer t0 4 figures 6-1 and 6-2

for pin voltages.

6-3