NAVELEX EE 181-AA-OMI-120/E121 C-7359-60-1
Table 5-1. Troubleshooting Procedures - Continued
(4) If fuse F2 is blown, replace fuse
and reconnect wires to TB7-S5
(5) If fuse blows, replace Data Trans-
b. If voltage on TB7-S5 and S6 is good,
connect positive meter lead to
Data Transmitter PC board A1-E21
and negative meter lead to CU
TB7-S6. Meter should indicate
20 ±1 vdc.
c. Connect positive meter lead to Data
Transmitter PC board A2-E7 and
negative meter lead to CU TB7-S6.
Meter should indicate 20 ±1 vdc.
d. If either of these indications is in-
correct, replace Data Transmitter.
e. If these indications are correct, con-
nect positive meter lead to Data
Transmitter PC board A2-E14
and negative meter lead to TB7-S6.
Meter should indicate 6.2 ±0.4 vdc
f. If this indication is not correct, re-
place Data Transmitter.
(1) To remove Data Transmitter,
tag, identify, and disconnect
wires from TB6 and TB7. Re-
move screws that secure Data
Transmitter to standoffs in
CU. Be careful not to drop
Transmitter inside CU. Remove
screws that secure cover and
remove cover. Remove code
plug from its socket on PC
(2) To replace Data Transmitter, re-
move screws that secure cover
and remove cover from new
Transmitter. Position code plug
from old Transmitter over soc-
ket X1 on PC board A2. Turn