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DISCRETE STATUS Page
The DISCRETE STATUS pages shows a matrix of all the pins on the connector. This is what shows for the status of each pin:
-G for grounded
-O for open
-V for 28V dc
-X for invalid
-for no discrete input on this pin.
You can verify the status of a discrete input for detailed fault isolation procedures.
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SOUTHWEST AIRLINES PROPRIETARY(c) All rights reserved
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737-700 MAINTENANCE TRAINING MANUAL

D EX MAINT/BITE
CSDU MAIN MENU 1/ 1 < CURRENT STATUS < INFLIGHT FAULTS < GROUND TESTS < IDENT/CONFIG
< INPUT MONITORING DISCRETE STATUS < INDEX

D EX MAINT/BITE
CSDU
DISCRETE STATUS MENU /

11 <INSERT A INSERT D>
<INSERT B INSERT E>
INSERT C INSERT F> DISCRETE STAT ES ARE DEFINED AS:
G = GROUND V= 28VDC O = OPEN X = INVALID
<INDEX

D EX MAINT/BITE
CSDU DISCRETE STATUS 1/ 2 INSERT D
A  B  CDE  F  G HJ  K 
1  - - - - - - - - - -
2  GG  - - - - G O  - -
3  - - - - - - - - - -
4  G  - G  - - - G  - - -
5  - - - - - - - - - -
6  -- O O  -- G G G G 
7  G O  -- G G G O G G 
8  G V  O G G G G V  G G 

<INDEX D EX MAINT/BITE

CSDU DISCRETE STATUS 2/ 2
INSERT D
ABCDEFGHJ K
9----GGG---10 --GGGOGG--11 OOGG --GG--12GV--G---GG 13----------14--GG------15----------
<INDEX

A31-62-00-812.fm
CDS BITE PAGES - INPUT MONITORING
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SOUTHWEST AIRLINES.
737-700 MAINTENANCE TRAINING MANUAL
CDS - SOFTWARE LOADING THIS PAGE INTENTIONALLY LEFT BLANK
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SOUTHWEST AIRLINES PROPRIETARY(c) All rights reserved
SOUTHWEST AIRLINES.
737-700 MAINTENANCE TRAINING MANUAL
A31-62-00-801.fm
CDS - SOFTWARE LOADING DEU Software You can load software in a DEU or download BITE data from a DEU. These are the types of software you can load in the DEUs: -Operational software -Operational program configuration -Display unit data base. Operational Software (OPS) The operation software is the software that operates the DEU. It takes a maximum of 90 minutes to load the OPS into each DEU. Operational Program Configuration (OPC) The OPCs replace most of the hardware program pins used in other airplanes. The OPCs define the customers configuration options. It takes approximately 5 minutes to load the OPC into each DEU. Display Unit Data Base (DUDB) There are several different types of display units for the common display system. The DUs are interchangeable. The DEU requires information about the drive signals for each type of DU. The DU data base has the information about the drive signals. You can load the DUDB into the DEU. It takes approximately 5 minutes to load the DUDB into each DEU.
Operation to Load Software
To load software into the DEU, use the data loader control panel. The engines must be off.
Select the DEU position on the lower switch on the data loader control panel. Select the left or right position on the upper switch on the data loader control panel.
Connect the portable data loader to the data transfer receptacle and put the diskette in the portable data loader.
NOTE: pull the data loader circuit breaker, located on the P18 panel, when connecting and disconnecting the data loader. See AMM Part 2 for more details.
When the data load is complete, you can verify that the new software part number shows on the CDS IDENT/CONFIG page.
Compatibility Checks
The DEU determines if these are not compatible:
　
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