S 864-042

 (2)  
Open these circuit breakers and attach DO-NOT-CLOSE tags:

 (a)  
6C17 OR 31EE2, L TRU

 (b)  
6C23 OR 32EE2, R TRU

 (c)  
6D9, TIE L

 (d)  
6H9, TIE R

 D.  Remove the TRU
 S 034-002
 (1)  Do these steps to disconnect the TRU:
 (a)  
Remove the electrical connector from the TRU.

 (b)  
Remove the terminal cover from the TRU.

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MAINTENANCE MANUAL

FWD
MAIN EQUIPMENT RIGHT TRU,CENTER
T102
SEE A MAIN EQUIPMENT SEE B CENTER ACCESS,
LEFT TRU, 119BLE1-1T101
E1-2 SEE B
MAIN EQUIPMENT CENTER A
ELECTRICAL 
CONNECTOR 
WASHER 
LOCKWASHER 
NUT  WIRE 
FWD 
TERMINAL  WIRE 
BLOCK COVER 
WASHER 
NUT  LOCKWASHER 
WASHER  TRANSFORMER-RECTIFIER UNIT 
SCREW  (EXAMPLE) 
B 
Transformer-Rectifier Units 
Figure 401 

M22685
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757 MAINTENANCE MANUAL
 (c)
Identify the leads on the terminals for installation.

 (d)
Remove the leads from the terminals.

 S 024-004
 (2) Remove the TRU (AMM 20-10-01/401).
 TASK 24-32-01-424-004
 3.  Install the TRU_______________
 A. References
 (1)
AMM 20-10-01/401, E/E Rack Mounted Components

 (2)
AMM 24-22-00/201, Electrical Power - Control

 (3)
AMM 27-61-00/201, Spoiler/Speedbrake Control System

 B. Access
 (1)  
Location Zones
 119/120 Main equipment center
 211/212 Flight compartment

 (2)  
Access Panels 119BL Main equipment center access

 C. Install the TRU
 (1)  S 424-005Install the TRU (AMM 20-10-01/401).
 (2)  S 434-006Do these steps to connect the TRU:
 WARNING:_______ MAKE SURE YOU CONNECT THE POSITIVE AND NEGATIVE POWER CABLES TO THE CORRECT TERMINALS. INJURY TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR IF THE POWER CABLES ARE CROSS CONNECTED.
 (a) (b)  Install the wire, washer, lockwasher and nut on the positive terminal of the TRU.Tighten the nut on the positive terminal of the TRU to 170-190 inch-pounds (19.2-21.5 Newton meters).

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757 MAINTENANCE MANUAL
 (c)  
Install the wire, washer, lockwasher and nut on the negative terminal of the TRU.

 (d)  
Tighten the nut on the negative terminal of the TRU to 135-145 inch-pounds (15.3-16.4 Newton meters).

 (e)  
Install the terminal cover on the TRU.

 (f)  
Connect the electrical connector to the TRU.

 S 864-043
 (3)  Remove the DO-NOT-CLOSE tags and close these circuit breakers on the P11 panel:
 (a)  
6C17 OR 31EE2, L TRU

 (b)  
6C23 OR 32EE2, R TRU

 (c)  
6D9, TIE L

 (d)  
6H9, TIE R

 D. Do a Test of the TRU Installation
 S 864-044
　
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