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TM 55-4920-383-13&P
Table 4-4. Troubleshooting Chart - Continued
Malfunction
6. Resistance measure-
ments incorrect.
7. Underrange blinking
(resistance measure-
ments) not functioning.
8. Unable to simulate
specific PROBE
capacitance.
Probable cause
Defective RESISTANCE
FUNCTION switch A2S4,
RESISTANCE RANGE
switch A2S5, or A2Z11,
Z12, Z14 and associated
circuitry.
Defective integrated circuits
A2Z1-10, A2Z13 and
associated circuitry.
a. Defective SIMULATORS-
—
PROBE 0-7000 pF
switch A3S1, 0-800 pF
switch A3S2, or
capacitors A3C1 through
C7.
b. Defective SIMULATORS-
PROBE A4C1.
Corrective action
Check and replace analog
board A2 as required.
Check and replace analog
board A2 as required.
a. Check and replace
simulator board A3
as required.
b. Check and replace air
capacitor board A4
as required.
4-18
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