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747-400 MAINTENANCE MANUAL
 S 024-025
 (3)  Remove the source select module:
 (a)  
Remove the screws from the module.

 (b)  
Pull the module until you can get access to the electrical connectors on the rear of the unit.

 (c)  
Disconnect the electrical connectors from the module.

 (d)  
Install dust caps on the electrical connectors.

 TASK 31-61-07-424-045
 3.  Source Select Module Installation_________________________________
 A. References
 (1)  
AMM 24-22-00/201, Manual Control (Apply Power)

 (2)  
AMM 31-25-01/401, Clocks

 (3)  
AIPC 31-61-01, Fig. 5

 B. Access
 (1)  Location Zone
 221 Control Cabin, LH
 222 Control Cabin, RH

 C. Procedure
 S 864-027
 (1)  Make sure these circuit breakers are open with DO-NOT-CLOSE tags attached:
 (a)  
P7, Overhead Circuit Breaker Panel 1) 7F9, EIU L 2) 7F10, EIU C 3) 7F15, EIU R

 (b)  
P6, Main Power Distribution Panel 1) 6E19, CAPT PANEL FLT DK LIGHTS 2) 6E23, F/O PANEL FLT DK LIGHTS

 S 424-029
 (2)  Install the source select module:
 (a)  Remove the dust caps from the electrical connectors.
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 (b)  
Examine the electrical connectors for loose, bent, or broken pins.

 (c)  
Connect the electrical connectors to the module.

 (d)  
Put the module into the instrument panel.

 (e)  
Install the screws into the front of the module.

 S 864-033
 (3)  Close these circuit breakers and remove the DO-NOT-CLOSE tags:
 (a)  
P7, Overhead Circuit Breaker Panel
 1) 7F9, EIU L
 2) 7F10, EIU C
 3) 7F15, EIU R

 (b)  
P6, Main Power Distribution Panel
 1) 6E19, CAPT PANEL FLT DK LIGHTS
 2) 6E23, F/O PANEL FLT DK LIGHTS

 S 864-037
 (4)  
Supply the electrical power (AMM 24-22-00/201).

 S 714-032

 (5)  
Do a test of the source select module:

 (a)  
Set the INBD CRT and LWR CRT switches on the display transfer modules to the NORM position.

 (b)  
Set the EIU SEL switch on the EICAS control panel/FMC switch to the AUTO position.

 (c)  
Set the EIU switches on the source select modules to the AUTO position.

 (d)  
Make sure the integrated display units (IDUs) show these formats: 1) The outboard IDUs show the PFD format. 2) The inboard IDUs show the ND format. 3) The upper IDU shows the EICAS primary engine format.

 (e)  
Set the FLT DIR/PVD switches on the source select modules (P1 and P3) to the R position. 1) Make sure that the PFDs do not show the flight

 director (FD) flag.

 (f)  
Open this circuit breaker:

 1)  P7, Overhead Circuit Breaker Panel
 a) 7D15, FLT CONT CMPTR R PWR

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 (g)  
Make sure the PFDs show the FD flag.

 (h)  
Close this circuit breaker:

 1)  P7, Overhead Circuit Breaker Panel
 a) 7D15, FLT CONT CMPTR R PWR

 (i)  
Set the NAV switches on the source select modules to the CDU C position. 1) Make sure that the CDU C display is on the lower left

 corner of the NDs.

 (j)  
　
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