TM 11-6625-3053-14
ITEM
MALFUNCTION
CHECKS/CORRECTIVE ACTION
13
If voltage is obtained, check R21 and C11 and replace
(cont'd)
faulty component.
If voltage is not obtained, check +40 VDC supply per T/S item 12,
checks 2 and 3.
7. Check Q1 of Main assembly.
a) Continuing with multimeter as set, measure voltage between
ground and the junction of R17 and R22.
Voltage should measure approx 23 VDC.
If voltage is obtained, go to check 8 below.
If voltage is not obtained, replace Q1 of the main assy.
8. AR4 check.
a) Continuing with multimeter as set, measure voltage between
ground and pin 1 of AR4.
Voltage should be approx 23 VDC.
If voltage is obtained, stop here.
If voltage not obtained, go to check 8b) below.
b) Continuing with multimeter as set, measure voltage between
ground and pin 8 of AR4.
Voltage should be approx 35 VDC.
If voltage obtained, go to check 8c) below.
If voltage is not obtained, check +40 V supply as in check 6
above.
c) Continuing with multimeter as set, measure voltage between
ground and pin 9 of AR4.
Voltage should be approx 25.5 VDC in steady state CW
operation, and approx 1.5 VDC in RF OFF before delay
activates.
If voltages were obtained as required in check 8.b)
and 8.c), replace AR4.
If voltages were not obtained, go to check 9 below.
9. Check Q1 of Al Assy.
a) Continuing with multimeter as set, measure voltage between
ground and pin 3 of AR3.
Voltage should be approx 0 VDC in steady state CW operation,
and approx 13.5 V in RF OFF before delay activates.
6-66
