Honeywell International Inc. RTA-50D Manuale Utente
MAINTENANCE MANUAL
965-1696
(9)
Manufacturing and Engineering Support I/O Circuitry
(a)
The manufacturing and engineering support I/O circuitry consists of:
• Ethernet interface used for data loading and troubleshooting
• RS232 port used for test equipment support.
E.
Front Panel I/O Board (Subtask 23-20-59-870-022-A01)
(1)
The front panel I/O board performs the conditioning of the signals that drive three LED lights
and monitors a push-button switch on the front panel of the RTA-50D VDR to initiate LRU
self-test. No self-test is available for this subassembly.
and monitors a push-button switch on the front panel of the RTA-50D VDR to initiate LRU
self-test. No self-test is available for this subassembly.
F.
Power Supply (Subtask 23-20-59-870-023-A01)
(1)
The power supply subassembly is a self-contained high-efficiency power supply that converts
the 28-VDC power into the DC operating voltages required by each subassembly. The power
supply circuitry is grouped into three sections:
the 28-VDC power into the DC operating voltages required by each subassembly. The power
supply circuitry is grouped into three sections:
• Power hold circuitry
• Input voltage conditioning circuitry
• DC-to-DC voltage conversion and output voltage conditioning.
(2)
The power supply is capable of holding power up during power input interrupts lasting
up to 200 ms. Each of the power supply output voltages are monitored on either the RF
subassembly or the processor subassembly.
up to 200 ms. Each of the power supply output voltages are monitored on either the RF
subassembly or the processor subassembly.
G.
Rear Interconnect (Subtask 23-20-59-870-024-A01)
(1)
The rear interconnect subassembly consists of the ARINC 600 connector that provides the
means to interface the power supply module, the processor CCA, and the RF CCA to the
aircraft wiring, and HIRF and lightning protection circuitry for each input/output. The RF
and power supply inputs are in the bottom plug. Discrete, ARINC 429, and analog audio
inputs/outputs are in the middle plug and the top plug.
means to interface the power supply module, the processor CCA, and the RF CCA to the
aircraft wiring, and HIRF and lightning protection circuitry for each input/output. The RF
and power supply inputs are in the bottom plug. Discrete, ARINC 429, and analog audio
inputs/outputs are in the middle plug and the top plug.
(2)
There is no active circuitry on this assembly and thus it has a low failure rate. No self-test is
available for the rear interconnect.
available for the rear interconnect.
EFFECTIVITY
ALL
23-20-59
Page 45
1 Mar 2011
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