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Page Title:
Table 6-1. Meter Test Circuit Troubleshooting (cont) |
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 C1, TM 11-6625-646-15
Trouble
Probable cause
Remedy
Function meter M1 does not indi-
Defective meter rectifier stage or
Replace component card
cate in the green area; FUNC-
multiplier resistor R402.
A02V3068. If this does not
TION switch at YAW FEED-
correct the trouble, reinstall the
BACK POT. EXCITATION
original card.
and a 2.5 vac test voltage is
connected between MAIN CON-
NECTOR TEST POINTS M
and P.
Faulty wiring or defective switch
Check continuity through the
S5 or S7.
circuit. (fig. 1-4). Repair wiring,
clean, or replace switches as
required.
YAW AXIS meter M2 does not
Defective actuator-simulator card
Replace the yaw channel actuator-
indicate when yaw channel
in J63.
simulator card. If this does not
voltages are being simulated by
correct the trouble, reinstall the
external test signals.
original card
Defective internal dc power supply
Replace component card
A02V3060. If this does not
correct the trouble, reinstall the
original card.
Defective signal input or power
Check signal input and power
wiring.
wiring to J63.
Defective wiring to metering
Check the wiring between the
circuit.
meter and pins 20 and 23 of J63.
Repair the wiring as required.
Defective meter M2
Replace defective meter.
ROLL AXIS meter M3 does not
Defective circuits on the actuator-
Replace the roll channel actuator-
indicate when roll channel
simulator card in J64.
simulator card. If this does not
voltages are being simulated by
correct the trouble, reinstall the
external test signals.
original card.
Defective internal power supply
Replace component card
A02V3060. If this does not
correct the trouble, reinstall the
original card.
Defective signal input or power
Check signal input and power
wiring.
wiring to J64.
Defective wiring to metering
Check the roll axis meter circuit
circuit.
from the meter through adapter
switch S5 to pins 20 and 23 of
J64. Repair wiring as required.
Defective meter M3
Replace defective meter.
PITCH AXIS meter M4 does not
Defective circuits on the actuator-
Replace the pitch channel
indicate when pitch channel volt-
simulator card in J65.
actuator-simulator card. If this
ages are being simulated by ex-
does not correct the trouble,
ternal test signals.
reinstall the original card.
Defective internal power supply
Replace component card
A02V3060. If this does not
correct the trouble, reinstall the
original card.
Defective signal input or power
Check signal input and power
wiring.
wiring to J65.
Defective wiring to metering
Check the pitch axis meter circuit
circuit.
from the meter through adapter
switch S5 to pins 20 and 23 of
J65. Repair wiring as required.
Defective meter M4
Replace defective meter.
48
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