Specifications

TM 11-5820-670-30
2-26. TROUBLESHOOTING CHARTS. (CONT)
CHART 2-5
No Audio Output Troubleshooting
(Sheet 4 of 8)
REMOVE A4200 AND INJECT
DISCONNECT P4902 FROM
0.15 VOLTS, 1000 Hz, AT
J4902 ON IF. ATTENUATOR
TP4003. SEE ILLUSTRA-
AND APPLY AN/U RM-103
TION, SH 7.
OUTPUT TO P4902. SEE
ILLUSTRATION, SH 8.
REPLACE IF. ATTENUATOR
A4900 (PARA 2-61).
CHECK A1600 FOR 110 VDC
REPEAT AUDIO POWER OUT-
OUTPUT AT PIN 5 ON VHF
PUT AND DISTORTION
TUNER. SEE ILLUSTRA-
PERFORMANCE TEST (PARA
TION, SH 6.
2-5).
REPLACE FL4001 0N A4000
ASSEMBLY (PARA 2-41).
REPLACE MODULES A1100
THRU A1500 (PARA 2-52).
ALINE A1000 ASSEMBLY
(PARA 2-35).
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.
ADJUST AN/URM-103 FOR
3 MILLIVOLTS OUTPUT AND
CHECK AC VOLTAGE AT
TP4005. SEE ILLUSTRA-
TION, SH 7.
2-75