TM 11-6625-2638-30
Table 2-3. Test Set Troubleshooting - Continued
STEP
PROCEDURE
NORMAL INDICATION
ABNORMAL INDICATION
CORRECTIVE ACTION
42
Verify that the following pulse occurs when the TRACKING FILTER RESET switch is depressed.
Pulse missing.
Check wiring (para 2-12).
Wrong voltage levels.
Replace circuit card (para 2-16).
Wrong pulse width. Replace circuit card (para 2-16).
43
a. Remove jumper wires (do not disconnect signal generator).
b. Connect DVM negative lead to GRD jack.
44
Use DVM to verify logic levels for TRACKING FILTER switch positions as follows:
a. Set TRACKING FILTER switch to ELEV A.
b. Depress and release TRACKING FILTER RESET switch.
TFT
lamp goes off, then comes back on.
J5-d
is 3.5 to 5.5 vdc.
J5-Z
is 3.5 to 5.5 vdc.
J5-c
is 0.0 0.5 vdc.
J5-a
is 0.0 to 0.5 vdc.
Other than above.
Check wiring (para 2-12).
Replace circuit card (para 2-16).
2-16
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