TM 11-6625-2638-30
Section IV. MAINTENANCE PROCEDURES
2-12. Checking Continuity General Instructions
Ensure that the test set power cords (115 vac and 28 vdc) are disconnected
from power source. Contact with 115 vac or the internal 300 vdc may cause
injury or death.
a. Place test set POWER switch to OFF.
b. Remove test set from the case (para 2-15).
NOTE
Refer to schematic diagram (FO-3) and wire lists (tables 2-4 and 2-5) when
continuity checking.
c. Check the continuity of each wire, switch, or component as applicable to the circuit.
d. Replace components as required (para 2-17 through para 2-24).
2-13. R196 Adjustment Procedure (fig. 2-3)
Perform adjustment of R196 as follows:
a. Remove test set from case (para 2-15).
High voltage is present. When power is applied to test set, voltages as high
as 115 vac and 300 vdc are present. Contact with high voltages may cause
injury or death.
b. Manually activate interlock switch S9.
c. Reconnect ac and dc POWER cords.
d. Connect DVM (AC mode) between J3-z and J3-q.
e. Place POWER switch to ON.
f. Adjust RI 96 on circuit board to 8.99 vac 0.05 vat.
9. Place POWER switch to OFF.
h. Disconnect ac and dc POWER cords.
2-29
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