TM 11-5821-333-30
Section IV. MAINTENANCE PROCEDURES
Subject
Para
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...6-19
Operational Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...6-20
Repair Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-21
Interconnecting Device... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..6-22
Reference Rt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-23
intercommunications System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-24
Reference Ecu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...6-25
Reference Dra . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-26
Test Cables, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..6-27
Test Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-28
Test Adapter Rf Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-29
Test Adapter Wires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-30
Test Adapter Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..... 6-31
Test Adapter Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-32
Test Adapter Test Points.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..6-33
Test Adapter Lamps and Lamp Holders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-34
Test Adapter Circuit Breakers CB1 and CB2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...6-35
Test Adapter Relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .., 6-36
Test Adapter Lamp Test CCA (A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...6-37
Test Adapter Rf Section Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...6-38
Test Adapter Voltage Regulator U1 and Receptacle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-39
Test Adapter Resistors R1 and R2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...6-40
Test Adapter Capacitors C1 and C2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...6-41
Test Adapter Terminal Boards TB1 and TB2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...6-42
Test Adapter Front Panel... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-43
Rt Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-44
6-19. GENERAL
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This section includes the operational check and the repair procedures, The operational check is used to verify
the operation of a repaired maintenance group. lt will identify the troubleshooting chart to be used if anyfaultsare
still present. When a fault is identified, repair it using the procedure in this section.
6-20. OPERATIONAL CHECK
The operational check provides a step-by-step procedure for evaluating a maintenance group. lf the operational
check is passed, the maintenance group can be returned to service. If it does not, the fault will be identified or
you will be referred to a troubleshooting chart or schematic.
The troubleshooting charts and troubleshooting
schematics are in section Il.
The operational check is divided into steps. Each step verifies a particular function. Follow the instruction in the
"Action’’ column. Check the response. lf the response incorrect, proceed with the next lettered action. When a
step has been completed, proceed to the next step. A “No response
“ in the ’’Response” column means that any
response is not of interest.
WARNING
Connect the test setups only when directed, and with the power supply off. The large current capacity of the test
power supply can cause personal injury. Verify the test setup before turning the power supply on.
CAUTION
During the operational check the rt cover is removed. Whenever the cover is removed, take all proper electro-
static discharge (ESD) precautions. Static electricity can damage the rt modules.
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