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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.
SHZ 009-999
Put the diskette in the airborne data loader.
SHZ 001-003
Put the diskette in the portable data loader and connect the
portable data loader to the data transfer unit receptacle.
SHZ ALL
CDS - TRAINING INFORMATION POINT - SOFTWARE LOADING
EFFECTIVITY
SHZ ALL 31-62-00
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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:
* OPS and DEU hardware
* Program pins in DEU 1 and DEU 2
* OPS to airplane type
* OPS to OPC
* DEU 1 to DEU 2 software.
If the OPS is not compatible with the DEU, the OPS will not load
into the DEU. The other compatibility checks are done
automatically at initialization. If the DEU finds anything that is
not compatible, you see a CDS FAULT maintenance message.
Operation to Download BITE Data
The DEU can download BITE data to a diskette. The diskette
must be preformatted to accept the download of the data.
SHZ 009-999
To download the BITE data, put the formatted diskette in the
airborne data loader. Select the DEU position on the lower
switch on the data loader control panel. Select the L or R
position on the upper switch on the data loader control panel.
The DEU automatically downloads the data to the diskette. The
airborne data loader shows that the load is done.
SHZ 001-003
To download the BITE data, put the formatted diskette in the
portable data loader. Select the DEU position on the lower
switch on the data loader control panel. Select the L or R
position on the upper switch on the data loader control panel.
The DEU automatically downloads the data to the diskette. The
portable data loader shows that the load is done.
SHZ ALL
Training Information Point
When you select a DEU on the data Loader control panel by
positioning both switches, that DEU does not drive any display
units. The other DEU provides the data for all 6 DUs, and CDS
FAULT shows.
CDS - TRAINING INFORMATION POINT - SOFTWARE LOADING
EFFECTIVITY
SHZ ALL 31-62-00
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CDS - TRAINING INFORMATION POINT - SOFTWARE LOADING
CDS - TRAINING INFORMATION POINT - SOFTWARE LOADING
EFFECTIVITY
SHZ ALL 31-62-00
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
31-62-00-801
General
The CDS has maintenance information that you can see on the
flight management systems control display unit (CDU).
To get access to the maintenance information, select CDS on
line select key (LSK) 5L from the MAINT BITE INDEX. This
shows the CDS BITE page.
On the CDS BITE INDEX page, select either DEU 1 on LSK 1L or
DEU 2 on LSK 2L. This shows the CDS MAINT/BITE main menu
for the DEU 1 or DEU 2.
CDS BITE Main Menu
There are five maintenance procedures that you do through the
CDS MAINT/BITE Main Menu. These are the procedures:
* Check of the current status
* Check of the inflight faults
* Ground tests
* Check of the identification and configuration information
* Check of the input monitoring discrete status.
To do a check of the current status, select LSK 1L.
To do a check of the inflight faults, select LSK 2L.
To operate a ground test, select LSK 3L. You can not operate a
ground test if the engines are on because there is no carrot for
LSK 3L.
To do a check of the identification and configuration information,
select LSK 4L.
To do a check of the input monitoring discrete status, select LSK
5L.
CDS - TRAINING INFORMATION POINT - CDU CDS BITE PAGES - CDS BITE MAIN MENU
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