TM 11-6625-2575-14
Corrective
action
Symptom
Probable
cause
Isolate defect and repair as necessary.
Q101, Q102, Q103, Q104.
9. No SCOPE HORIZ output.
Isolate defect and repair as necessary.
10. No blanking video mode.
Q109, S102.
Isolate defect and repair as necessary.
Q203, Q204, S102.
11. No blanking RF mode.
a. Isolate defect and repair as neces-
a. +200v dc Supply.
12. Insufficient SWEEP WIDTH.
sary.
b. Q106, Q107.
assembly.)
Isolate defect and repair as necessary.
a. VR3, CR7 (+30v dc Supply).
13. Power supply will not adjust properly.
b. VR6, CR9 (-30v dc Supply).
c. 12.(+ 200v dc Supply) .
Isolate defect and repair as necessary.
VR3, CR7, Q1, Q4.
14. +30v dc will not regulate.
Isolate defect and repair as necessary.
VR6, CR9, Q5, Q8.
15. -30v dc will not regulate.
Isolate defect and repair as necessary.
12, Q9, Q11.
16. +200v de will not regulate.
Isolate defect and repair as necessary.
a. CR2, CR6, C1D, C6.
17. +30v dc not present or ripple is excessive.
b. Q1, Q2, Q3, Q4.
Isolate defect and repair as necessary.
a. CR3, CR5, C7, C10.
18. -30v dc not present or ripple is excessive.
b. Q5, Q6, Q7, Q8.
Isolate defect and repair as necessary.
a. CR1, CR4, C1A, C1B.
19. +200v dc not present or ripple is ex-
b. C16, C14, Q9, Q10, Q11.
cessive.
a. Isolate defect and repair as neces-
a. R210 (RF LEVEL SET
20. RF OUT (output) has excessive voltage
sary.
MAX) .
variation in both bands.
b. Q202, Q203, Q206, Q207.
c. Monitor/mixer;
assembly.)
a. Isolate defect and repair as neces-
a. +200v dc Supply.
21. RF OUT (output) frequency does not
sary.
b. Q106, Q107.
track dial.
c. Loose dial setscrews.
defective rf assembly.)
e. Fixed oscillator.
Isolate defect and repair as necessary.
CR1, CR6, R1, C1C, C2.
22. +50v dc not present.
Isolate defect and repair as necessary.
23. No internal or external frequency mark-
Q307
ers.
a. Isolate defect and repair as neces-
a. Q306
sary.
ternal frequency markers.
b. Monitor/mixer
assembly.)
Isolate defect and repair as necessary.
a. Q301, Q302, Q303, or Q304.
25. Individual marker produces no displayed
frequency marker.
b. Individual plug-in marker.
c. R301 through R308 require
adjustment.
Isolate defect and repair as necessary.
Q305.
nal plug-in marker display.
7-6