TM 11-5820-890-20-1
2.2.
OPERATIONAL CHECK.
The following Operational Check for Manpack Radios, identical in both TM 20-1 and TM 20-3 (Unit
Maintenance Handbook), is used to identify what is wrong with a Manpack Radio and determine what
corrective actions needs to be taken at Unit Maintenance Level. After corrective action has been taken, this
Operational Check is used a second time to verify that the radio is fully operational*. As a minimum, perform a
communication check.
Corrective actions are either specifically stated (for example, Replace RT), or the Unit Maintainer is advised of
the most likely symptom to pursue. When the Operational Check identifies a symptom for problem that requires
further investigation, the Unit Maintainer is referred to a Troubleshooting Flowchart (TS CHART) which is used to
isolate the fault.
In short, use of the Operational Check either identifies the problem and specifies action to be taken, or cites a
symptom and refers the Unit Maintainer to a specific Troubleshooting Flowchart. Use of the Operational Check
after corrective action has been taken helps to ensure that the Manpack Radio is in fact operational, and such
use greatly reduces the possibility of false pulls at Unit Maintenance Level.
*
Operational Check procedures must be performed as shown and in the order given.
OPERATIONAL CHECK FOR MANPACK RADIOS
STEP 1. PREPARATION:
STEPS TO PERFORM
1.1
Set RT
FCTN to OFF
CHAN to MAN
MODE to SC
RF PWR to HI
VOL to Mid-Range
DIM to Full CW
COMSEC to Z
1.2
Handset, H-250: / HRCRD***
Connect to RT AUD/DATA
CHECKS TO MAKE
ACTIONS TO TAKE
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Ensure handset is operational
Install known good handset
1.3 Main Battery
Ensure good power
Install known good battery
1.4
Hold-Up Battery (HUB)
Ensure good HUB
Install known good HUB
STEP 2. POWER CHECKS:
STEPS TO PERFORM
CHECKS TO MAKE
ACTIONS TO TAKE
2.1
Set FCTN to Z-FH or
RT display lights?
YES:
Go to Step 3.1
Z for RT-1523E
NO:
Replace Battery Box **
RT display then lights?
YES:
Go to Step 3.1
NO: Replace RT
RT display reads GOOD?
YES: Continue 1
NO:
Replace RT
RT HUB lit?
NO:
Go to STEP 3
YES:
Replace HUB l *
RT HUB still lit?
NO:
Go to STEP 3
YES: Replace RT
**
After completing a corrective action, continue with next Operational Check step.
*** See TM 11-5820-890-10-8 for operator procedures. HRCRD is non reparable and should be used until
non Functional.
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