Doc # 6.02.01 Page 103
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AMM
C. Marker Beacon Receiver Functions
% This paragraph applies to the KMA 28 and GMA 340 audio panels.
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DA 40 Series
Trouble Possible Cause Repair
Marker beacon receiver does not operate. Circuit breaker pulled. Defective wiring. Faulty audio panel. Re-set the circuit breaker. Do a continuity test of the related wires. Replace defective wires. Repair or replace audio panel.
No marker beacon reception. Faulty audio panel. Faulty marker beacon antenna. Faulty connection between marker beacon antenna and audio panel. Repair or replace audio panel. Do a test for correct impedance of the antenna. If necessary, repair or replace the antenna. Ensure proper cable connections. Do a test for correct impedance of the antenna co-axial cable. Do a test for continuity on each cable. Do a test for short circuit to ground and between cables. Replace defective cables.
No audio signal. Marker lights OK. MKR/MUTE or MKR button not pressed. Faulty head-set. Faulty head-set socket. Faulty audio panel. Press the MKR/MUTE or MKR button. Replace the head-set. Replace the head-set socket. Repair or replace audio panel.
Page 104 Doc # 6.02.01 09 Jan 2003 Rev. 4
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Communications
AMM
Maintenance Practices
1. General
% This Section tells you how to remove/install the intercom, the audio panel, and the marker beacon % receiver antenna. It also tells you how to test the intercom or the audio panel. Refer to the equipment manufacturers' manuals for more data about the audio integrating system.
2. Remove/Install the PM 1000 II Intercom
A. Remove the PM 1000 II Intercom
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Detail Steps/Work Items Key Items/References
WARNING: MAKE THE ENGINE IS SAFE BEFORE YOU DO ANY WORK ON THE AIRPLANE. IF THE ENGINE STARTS THE PROPELLER CAN CAUSE INJURY OR DEATH.
(1) Make sure that the engine is safe. Lycoming engine: S Set the ignition switch to OFF. S Set the ALT/BAT switch to OFF. S Set the throttle to IDLE. S Set the mixture control to LEAN CUT-OFF. TAE engine: S Set the ELECTRIC MASTER key switch to OFF. S Set the ENGINE MASTER switch to OFF. S Set the power lever to IDLE.
(2) Remove the engine top cowling. Refer to Section 71-10 (Lycoming version) or 71-11 (TAE version).
(3) Disconnect the airplane battery. Refer to Section 24-31 (Lycoming version) or 24-34 (TAE version).
(4) Remove the instrument panel cover. Refer to Section 25-10.
(5) Disconnect the connector from the PM 1000 II
(6) Remove the attaching screws and knobs from the PM 1000 II. Hold the PM 1000 II!
(7) Remove the unit from the instrument panel.
Doc # 6.02.01 Page 201
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AMM
B. Install the PM 1000 II Intercom
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Detail Steps/Work Items Key Items/References
(1) Put the PM 1000 II in position in the instrument panel.
(2) Install the attaching screws.
(3) Connect the connector to the PM 1000 II.
(4) Install the instrument panel cover. Refer to Section 25-10.
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