(a)  
6L9, HOT BAT BUS

 (b)  
6L10, BAT BUS PWR

 (c)  
6L11, INV PWR BAT

 S 864-003
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A

757
MAINTENANCE MANUAL

K106 - MAIN BATTERY TRANSFER RELAY
POWER DISTRIBUTION PANEL P6

Main Battery and Main Battery Transfer Relay Installation
Figure 401

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757 MAINTENANCE MANUAL
 S 024-005
 (4)  Do these steps to remove the main battery relay or main battery transfer relay:
 WARNING: REMOVE ALL ELECTRICAL POWER FROM THE AIRPLANE BEFORE YOU
_______ OPEN THE P6 PANEL. VOLTAGES IN THE P6 PANEL CAN CAUSE SERIOUS INJURY TO PERSONS.
 (a)  
Open the P6 panel.

 (b)  
Identify the wires on the applicable relay for installation.

 (c)  
Remove the wires from the applicable relay.

 (d)  
Remove the screws that hold the applicable relay.

 (e)  
Remove the main battery relay or main battery transfer relay.

 TASK 24-31-06-404-006
 3. Install the Main Battery Relay or Main Battery Transfer Relay (Fig. 401)
_____________________________________________________________
 A. References
 (1)  
24-22-00/201, Electrical Power - Control

 (2)  
27-61-00/201, Spoiler/Speedbrake Control System

 B. Access
 (1)  Location Zone
 211/212 Flight Compartment

 C. Install the Main Battery Relay or Main Battery Transfer Relay
 S 424-007
 (1)  Do these steps to install the applicable relay:
 (a)  
Put the applicable relay in position in the P6 panel.

 (b)  
Install the screws that hold the relay.

 CAUTION: MAKE SURE ALL WIRES ARE CORRECTLY CONNECTED TO THE RELAY.
_______ AN INCORRECT CONNECTION CAN CAUSE SERIOUS SERIOUS DAMAGE TO THE DC CIRCUIT COMPONENTS ON THE AIRPLANE.
 (c)  Connect the wires to the applicable relay.
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757 MAINTENANCE MANUAL
 (d)  Close the P6 panel.
 S 864-008
 (2)  Remove the DO-NOT-CLOSE tag and close these P6 panel circuit breakers:
 (a)  
6L9, HOT BAT BUS

 (b)  
6L10, BAT BUS PWR

 (c)  
6L11, INV PWR BAT

 D.  Do a test of the main battery relay or main battery transfer relay installation.
 S 864-009
 (1)  
Supply electrical power (Ref 24-22-00).

 S 714-010

 (2)  
Do these steps at the standby power control panel on the pilots' overhead panel, P5:

 (a)  
Turn the STBY POWER switch to the AUTO position.

 (b)  
Make sure the OFF light adjacent to the switch is off.

 (c)  
Turn the STBY POWER switch to the BAT position.

 (d)  
Make sure the OFF light adjacent to the switch is off.

 (e)  
Turn the STBY POWER switch to the OFF position.

 (f)  
Make sure the OFF light adjacent to the switch comes on.

 S 864-011
 (3)  
Do the activation procedure for the spoilers if you did the deactivation procedure (Ref 27-61-00).

 (4)
Remove electrical power if it is not necessary (Ref 24-22-00).

 S 864-012
　
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