TM 11-6720-242-35
Figure 3-2.
Sean sink assembly, test setup.
(2) Troubleshooting camera control.
Malfunction
Probable Cause
Corrective Action
Item
1
No dc voltage outputs from
Transformer T2
Perform test procedure (para 3 5)
power supply
to isolate trouble.
Bridge rectifier
Same as above.
2
No ac voltage outputs from
Transformer T1 i
Perform test procedure (para 3 5)
power supply
to isolate trouble.
3
Dc circuit breaker 2CB1
Defective magnetic circuit
Replace circuit breaker (para 3 27).
cannot be reset.
4
Ac circuit breaker 2CB2
Defective magnetic circuit
Replace circuit breaker (para 3 27).
cannot be reset.
5
AEI network on interconnect
Resistors RI through R7 on inter
a. Check circuit wiring on inter
ing board
connecting board
connection board assembly
(fig. 6 18). Connect an ohmmeter
across terminal contacts and
check continuity.
b. Check each resistor to isolate the
trouble and replace where
needed.
6
Output of AEC feedback
Operation of AEC servomotor in
Check resistor R8 on interconnection
potentiometer oscillates
camera body unstable
board. Replace, if necessary. Refer
to higher category of maintenance
if resistor is good.
7
AEC servomotor mal-
Output of 0 A and , B control
Check capacitor C1 on interconnection
functioning
voltage on aec board assembly
board. replace if necessary. Refer
to higher category of maintenance
if capacitor is good.
Change 1 3-4
