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Section II. MANPACK RADIO
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TM-11-5820-890-20-3 Ground ICOM Radio Sets AN/PRC-119A AN/VRC-87A AN/VRC-88A AN/VRC-89A AN/VRC-90A AN/VRC-91A AN/VRC-92A Manual
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Step 5. TRANSMITTER CHECKS


TM 115820890203
OPERATIONAL CHECK. Continued
2.1.
Step 3. RT SELF-TEST
I  CHECKS
ACTIONS
STEPS
N/A
N/A
3.1 Set RT COMSEC to CT
YES: Go to Step 3.2
RT passes
Set RT FCTN to TST
NO:
Disconnect ANT and
self-test?
HS; rerun self-test
YES: Connect ANT and
RT then passes
HS; go to Step 3,2
self-test?
NO:
Replace RT
3.2 Set RT:
N/A
N/A
FCTN to LD
N/A
N/A
CHAN to MAN
DATA to OFF
RT display reads
YES: Continue
30000?
Replace RT
NO:
YES: Go to Step 3,3
COMSEC alarm
NO:
Replace RT
sounds?
YES: Go to STEP 4
COMSEC alarm
3.3 Press PTT twice
Replace RT
NO:
clears?
Step 4. LOAD CHECKS
ACTIONS
CHECKS
STEPS
4.1 Load RT:
SC frequencies
YES: Go to Step 4.2
NO:
Replace RT
load properly?
Chan 1: 41000
Chan 2: 54000
Chan 3: 75000
4.2 Load COMSEC and FH data*
RT accepts fill?
YES: Go to Step 4.3
NO:
Go to TS Guide 1
4.3 Load test sync time (82/09:36)
Test sync time
YES: Go to Step 4.4
loads properly?
NO:
Replace RT
4.4 Set RT to STBY
RT shuts down
YES: Go to Step 4.5
properly?
NO:
Replace RT
4.5 Remove Main Btry
RT retains data in
YES: Go to Step 4.6
Replace after 1 min.
FH and SC?
NO:
Replace RT
Set RT FCTN to SQ ON
4.6 Set RT FCTN to LD
N/A
N/A
Load Btry Life Condition
Btry Life loads?
YES: Go to STEP 5
NO:
Replace RT
*
If using an ANCD, follow ICOM Fill procedure to load COMSEC keys and FH data in all 6
channels. Otherwise, load COMSEC keys and FH data in Channels 1, 2, and 3.
22


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