S 434-040

 (4)  
Reconnect the battery connector to the main battery, located in the electronic equipment area.

 S 734-035

 (5)
Do this task: AC Generation - System Test (AMM 24-21-00/501).

 TASK 24-21-41-004-047
 4.  Remove the MPCB from the P6-3 and P6-4 Panels (Fig. 401)_____________________________________________
 A. Access
 (1)  
Location Zones 102 Right Control Cabin - Main Power Distribution Panel P6

 B.
Prepare for the Removal

 (1)  
Remove electrical power (AMM 24-22-00/201).

 S 034-041

 (2)  
Disconnect the battery connector from the main battery, located in the electronic equipment area.

 S 014-043

 (3)  
Loosen the three screws on the top of the P6-3 and the P6-4 panels, and open the panels.

 C.
Procedure

 S 864-028
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 S 024-049
 WARNING: MAKE SURE ALL THE POWER IS OFF BEFORE YOU TOUCH A CONDUCTOR IN
_______ THE CONTROL COMPARTMENTS. ELECTRICAL SHOCKS CAN CAUSE INJURY TO PERSONS.
 (1)  Remove the MPCB:
 (a)  
Remove the electrical wires from the terminal studs. 1) Tag each wire with the correct identification to help with installation. 2) Make a note of the position of the wire terminals, plain washers, lockwashers, and nuts on each terminal stud.

 3)  Where more than one wire attaches to a stud, attach the parts together, and tag for each stud.

 (b)  
Remove the four MPCB installation screws and washers.

 (c)  
Remove the MPCB.

 TASK 24-21-41-404-050
 5.  Install the MPCB in the P6-3 and P6-4 Panels (Fig. 401)
____________________________________________
 A.  Access
 (1)  Location Zones 102 Right Control Cabin - P6 Main Power Distribution Panel
 B.  Prepare for the Installation
 S 214-052
 WARNING: MAKE SURE ALL THE POWER IS OFF BEFORE YOU TOUCH A CONDUCTOR IN
_______ THE CONTROL COMPARTMENTS. ELECTRICAL SHOCKS CAN CAUSE INJURY TO PERSONS.
 (1)  Examine the wires for damage caused by heat or corrosion.
 CAUTION:_______DO NOT USE METAL OXIDE ABRASIVES. YOU CAN CAUSE DAMAGE TO THE TERMINAL.
 (a)  
Remove the corrosion with sandpaper or a rubber eraser.

 (b)  
If the terminal or the wire is damaged, replace the terminal if the wire has sufficient length. 1) Refer to the Notes Section of the Wire Diagram Manual for

 the terminal installation instructions.

 (c)  
If the wire is too short, replace the wire.

 C.  Procedure
 S 424-037
 (1)  Install the MPCB:
 (a)  
Put the MPCB in the correct position.

 (b)  
Install the four installation screws and washers.

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737-300/400/500MAINTENANCE MANUAL
 S 434-036
 (2)  Attach the wires to the MPCB:
 (a)  
Install the wires on the terminal studs.

 1)  Use the notes you made during the removal procedure to make the correct installation.

 (b)  
Install the nuts on the studs.

 CAUTION: IMPROPERLY SEATED TERMINALS MAY LEAD THE TERMINAL TO WORK
_______ FREE AND CAUSE ELECTRICAL ARCING AND THE TERMINAL TO OVERHEAT.
 (c)  
Make sure the terminals are fully seated on the studs.

 (d)  
Tighten the nuts to the torque values in (SWPM 20-30-00).

 S 414-032
 (3)  
Close the P6-3 and P6-4 panels and tighten screws.

 S 434-045

 (4)  
　
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