Diamond Aircraft DV 20 E 2022, Airplane Maintenance Manual

Page: 246 / 903

AIRCRAFT
Communications
DV 20 E AMM
Page 202
15 Mar 2022
23-50-00
Doc # 4.02.25
Rev. 2
B. Install the GMA 340 Audio Panel
Detail Steps/Work Items Key Items/References
(1) Remove the protective covers from the
connectors on the replacement unit.
(2) Slide the unit into the rack. Engage the locking
screw so that the latch front lobe touches the
rack.
(3) Turn the locking screw clockwise so that the
rear lobe engages the mounting rack.
Until the unit locks.
CAUTION: DO NOT OVER-TIGHTEN THE LOCKING SCREW. YOU CAN
DAMAGE THE LOCKING MECHANISM.
(4) Continue to turn the screw until the unit is fully
installed in the mounting rack.
(5) Close the ICS circuit-breaker.
(6) Do a functional test.
C. Adjustment/Test of the GMA 340 Audio Panel
Detail Steps/Work Items Key Items/References
(1) Do the lamp test as follows:
S
Apply power to the unit by rotating the pilot
intercom knob clockwise.
S
Press the TEST button to confirm the
operation of the LEDs.
S
Cover the photocell with a finger and
observe that the LED annunciators dim
automatically.
S
Check the front panel backlighting and
dimming function.
Refer to item 5 in Figure 1.
Refer to item 17 in Figure 1.
Refer to item 19 in Figure 1.
Make sure that each annunciation is
illuminated.