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Page Title:
CHART 2-5. No Audio Output Troubleshooting(Sheet 4 of 8) |
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|  TM 11-5820-670-30
2-26. TROUBLESHOOTING CHARTS. (CONT)
CHART 2-5
No Audio Output Troubleshooting
(Sheet 4 of 8)
REPLACE MODULES A1100
THRU A1500 (PARA 2-52).
DISCONNECT P4902 FROM
REMOVE A4200 AND INJECT
J4902 ON IF. ATTENUATOR
ALINE A1000 ASSEMBLY
0.15 VOLTS, 1000 Hz, AT
AND APPLY AN/U RM-103
TP4003. SEE ILLUSTRA-
OUTPUT TO P4902. SEE
TION, SH 7.
ILLUSTRATION, SH 8.
ADJUST AN/URM-103 FOR
100 MILLIVOLTS OUTPUT
AND CHECK FOR ABOUT
0.1 VAC AT TP4009 ON IF.
AMPLIFIER ASSEMBLY.
SEE ILLUSTRATION, SH 7.
REPLACE IF. ATTENUATOR
A4900 (PARA 2-61).
ADJUST AN/URM-103 FOR
REPEAT AUDIO POWER OUT-
CHECK A1600 FOR 110 VDC
3 MILLIVOLTS OUTPUT AND
PUT AND DISTORTION
OUTPUT AT PIN 5 ON VHF
CHECK AC VOLTAGE AT
PERFORMANCE TEST (PARA
TUNER. SEE ILLUSTRA-
TP4005. SEE ILLUSTRA-
2-5).
TION, SH 6.
TION, SH 7.
REPLACE FL4001 0N A4000
ASSEMBLY (PARA 2-41).
2-75
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