(3)
Do the Maintenance Message Erase Procedure (AMM 31-41-00/201).

 S 864-011

 (4)  
Make sure the STBY POWER switch, on the pilots' overhead panel P5, is set to the AUTO position.

 S 714-020

 (5)  
Do a test of the main battery as follows:

 (a)  
Push the ECS MSG switch on the EICAS maintenance panel on the right side panel, P61.

 (b)  
Make sure the EICAS message, MAIN BAT CHGR, does not show on the bottom display.

 (c)  
Make sure the BAT switch on the P5 panel is ON.

 (d)  
Turn the STBY POWER switch on the P5 panel to the BAT position.

 (e)  
Push the ELEC HYD switch on the EICAS maintenance panel.

 (f)  
Make sure this value shows below STBY/BAT on the bottom EICAS display: 1) DC-V = 24 |4

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757 MAINTENANCE MANUAL
 (g) (h)  Set the Captain's and First Officer's clocks to the correct time and date (AMM 31-25-00/506).Turn the STBY POWER switch to the AUTO position
 (6)  S 494-016Put the battery hoist in the airplane, or send the hoist to supply, as applicable.
 (7)  S 864-017Remove electrical power if it is not necessary (AMM 24-22-00/201).

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757 MAINTENANCE MANUAL
 MAIN BATTERY CHARGER - REMOVAL/INSTALLATION
___________________________________________
 1.  General
_______
 A.  The main battery charger, M218, (referred to as the battery charger) is on the left side of the forward equipment center.
 TASK 24-31-02-004-001
 2.  Remove the Main Battery Charger (Fig. 401)
_______________________________
 A.  References
 (1)  AMM 20-10-01/401, E/E Rack Mounted Components
 B.  Access
 (1)  
Location Zone
 113/114 Area forward of NLG wheel well

 (2)  
Access Panel
 113AL Forward equipment center access

 C.  Prepare for Removal
 S 864-002
 CAUTION: OPEN THESE CIRCUIT BREAKERS IN THE SEQUENCE SHOWN TO PREVENT
_______
 DAMAGE TO THE MAIN BATTERY CHARGER.

 (1)  Open this circuit breaker on the right miscellaneous electrical equipment panel (referred to as the P37 panel) and attach a DO-NOT-CLOSE tag:
 (a)  37B2, MAIN BATTERY CHARGER
 S 864-003
 (2)  Open this circuit breaker on the main power distribution panel (referred to as the P6 panel) and attach a DO-NOT-CLOSE tag:
 (a)  6L8, MAIN BAT CHGR
 D.  Remove the Battery Charger
 S 034-004
 (1)  Do these steps to disconnect the battery charger:
 (a)  
Disconnect the electrical connector from the battery charger.

 (b)  
Remove the terminal cover from the battery charger.

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757
MAINTENANCE MANUAL

SEE A EQUIPMENT FORWARD CENTER 
FORWARD EQUIPMENT CENTER LOCATION 
CHARGER, M218 MAIN BATTERY  INVERTER STATIC 

1 
WASHER LOCKWASHER NUT  FWD ELECTRICAL CONNECTOR 
WASHER LOCKWASHER WIRES  NUT  BLOCK COVER TERMINAL SCREW WASHER 
1  CHARGER AND BATTERY LEDs BATTERY CHARGER WITH THE  A FORWARD EQUIPMENT CENTER 
Main Battery Charger Installation Figure 401 
　
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