TM 11-5840-281-12-1
4-32. ORGANIZATIONAL TROUBLESHOOTING. (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
9.
Intensified dot but no timebase sweep on crt of either control-indicator when NORM, 350 EL, 600 AZ, or
SIMULT mode. (Cont)
3.
Adjust R8702 - 18V VERT ADJ for multimeter indication of - 18 v.
If adjustment in 1 through 3 cannot be accomplished, replace 18V voltage
regulator card (para 4-39) and perform control-indicator power supply
adjustments (para 4-42).
Step 2.
Place BITE SELECT switch to - 18V HORIZ position and observe AZ TILT/BITE meter indication.
a. If meter indicates in green zone, proceed to step 3.
b. If no meter indication is obtained, replace 18V voltage regulator card (para
c.
If meter indicates other than green zone, adjust 18V voltage regulator card
as indicated in 1 through 3.
1.
Set up multimeter to measure - 20 v.
2.
Connect positive lead of multimeter to J616 DC RET and connect
negative lead to J615 BITE MON.
3.
Adjust R8709 - 18V HORIZ ADJ for multimeter indication of - 18 v.
If adjustment in 1 through 3 cannot be accomplished, replace 18V voltage
regulator card (para 4-39) and perform control-indicator power supply
adjustments (para 4-42).
Step 3.
Perform fixed coil amplifier adjustments (para 4-45).
If fixed coil amplifier adjustments cannot be accomplished, replace fixed coil
amplifier card (para 4-39) and perform ppi display adjustments and precision
display adjustments (para 4-28).
10.
No vertical deflection on azimuth display of either control-indicator.
Step 1.
Place ANGLE VOLTS switch on pulse generator to AZ position and rotate ART ANGLE V control
clockwise and counterclockwise.
If artificial sweep on azimuth display does not move up and down, refer to a
higher category of maintenance.
4-112
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