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Page Title:
Synthesizer Test Tray A3, Trouble Localization Chart (cont) |
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|  TM 11-6625-847-12
Step
Control setting and
Performance standard and
No.
Operation of test
operation of equipment
references
equipment
Module 1A3, RT-662/
GRC.
c. 10 and 1 kc synthesizer
Module 1A4, RT-622/
GRC.
Module 1A6, RT-662/
GRC.
e. Translator Module 1A8,
RT-662/GRC.
f. Mc synthesizer Module
1A9, RT-/GRC.
9
Set test set SERV SEL switch
Tray A3 POWER indicator il-
to STBY, and tray AS POWER
luminates.
switch to ON.
10
If operating from a cold start,
allow 15-minute warmup time
for equipment stability. If
equipment has been warmed up
within the last hour, 5-minute
warmup time is sufficient.
11
Connect AM/PSM-across
Adjust tray AS POWER ADJ
AN/PSM-indicates voltage
tray AS POWER IN-
control from fully counter-
varying from minimum 0 volt
PUTS VAR test connector
clockwise to fully clockwise.
dc to maximum +26 volts dc;
and POWER INPUTS
set to +20 volts dc (para
(ground) test connector.
12
Disconnect AN/PSM-6.
13
Connect AN/URM-145
Set 10&1KC SYNTH OUTPUT
Observe that output increases
to tray A2 10&1KC
AMPL switch to ON, and ad-
as adjustment is made clock-
SYNTH OUTPUT 7.1
just 10&1KC SYNTH OUT-
wise (para 4-21, item No. 5).
MC connector.
PUT VOLT ADJ control from
fully counterclockwise to fully
Caution: Adjust AN/
clockwise. Return 10&1KC
URM-145 to scale above
SYNTH OUTPUT VOLT ADJ
1 volt, and readjust ac-
control from fully counterclock-
cordingly to avoid damage
wise to fully clockwise. Return
to instrument.
10&1KC SYNTH OUTPUT
VOLT ADJ control to mid-
range.
14
Disconnect AN/URM-145
from 10&1KC SYNTH
OUTPUT 7.1 MC con-
nector.
15
Connect AN/URM-145 to
Set tray A3 10&1KC SYNTH
Observe that the output increases
tray AS 10&1KC SYNTH
SYNTH OUTPUTS AMPL
as the adjustment is made
OUTPUTS connector.
switch to ON, and adjust
clockwise (para 421, item
Caution: Adjust AN/
10&1KC SYNTH SYNTH
No. 6).
URM-145 to scale above
OUTPUTS VOLT ADJ con-
1 volt, and readjust ac-
trol from fully counterclock-
cordingly to avoid damage
wise to fully clockwise. Return
to instrument.
10&1KC SYNTH SYNTH
OUTPUTS VOLT ADJ control
to midrange.
16
Disconnect AN/URM-145
from 10&1KC SYNTH
SYNTH OUTPUTS
connector.
4-13
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