Directed Electronics A1200/4 Specifikace stáhnout pdf (Strana 175)

TM 11-5820-670-30

2-26. TROUBLESHOOTING CHARTS.

(CONT)

CHART 2-8

Poor Audio Response Troubleshooting

(Sheet 1 of 2)

CONNECT EQUIPMENT AS

SHOWN IN AUDIO-FRE-

QUENCY RESPONSE

PERFORMANCE TEST (PARA

2-6).

CONNECT THE TS-723B/U TO

TEST POINT TP4007 ON IF.

AMPLIFIER ASSEMBLY

A4000. SEE ILLUSTRATION,

SH 2.

CHECK AUDIO RESPONSE AT

TP5513 0N ASSEMBLY A5500.

SEE ILLUSTRATION, SH 2.

CHECK AUDIO RESPONSE

AT TP5509 0N A5500. SEE

ILLUSTRATION, SH 2.

REPLACE AUDIO AND

SQUELCH PREAMPLIFIER

MODULE A4300 (PARA 2-41).

PERFORM AUDIOFRE-

QUENCY RESPONSE AND

FRONT PANEL METER

PERFORMANCE TEST

(PARA 2-6).

REPLACE AUDIO AMPLIFIER

MODULE A5400 (PARA 2-44).

ALINE (PARA 2-30).

REPLACE LOW PASS FILTER

FL5001 (PARA 2-44).

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