S 864-003

 (2)  
Open these circuit breakers on the overhead circuit breaker panel, P11, and attach DO-NOT-CLOSE tags:

 (a)  
11C30, LANDING GEAR POS SYS 1

 (b)  
11R33, DOOR IND

 (c)  
11R36, PROX SW TEST

 (d)  
11S23, POS SYS 2

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PROXIMITY MAIN EQUIPMENT SWITCH CENTER ELECTRONICS UNIT (M162)
SEE A
SEE B
ACCESS DOOR FOR THE
MAIN EQUIPMENT CENTER ACCESS DOOR FOR THE

119BL (REF) MAIN EQUIPMENT CENTER 119BL (REF) E3-4 SHELF (REF) BITE CARD NO. 1 (REF)
MAIN EQUIPMENT CENTER
BITE CARD NO. 2 (REF)
A
LOGIC CARD NO. 009 BITE MODULE
DRIVER CARD NO. 010 ASSEMBLY LOGIC CARD NO. 011
(008) PROXIMITY CARD NO. 012
PROXIMITY CARD NO. 014
PROXIMITY CARD NO. 002 PSEU
PROXIMITY CARD NO. 003
(REF) PROXIMITY CARD NO. 004
LOGIC CARD NO. 005
DRIVER CARD NO. 006
DRIVER CARD NO. 007
PROXIMITY CARD NO. 015
HINGE PANEL
(REF)

PROXIMITY SWITCH ELECTRONICS UNIT (M162)
B

Circuit Card Installation for the Proximity Switch Electronics Unit
Figure 401

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 S 864-021
 (3)  
Look at the P11 panel at grid location 11C19 and identify the circuit breaker name that is at this location.

 (a)  
AIRPLANES WITHOUT THE "LANDING GEAR POS SYS 2 ALTN" CIRCUIT BREAKER INSTALLED AT PANEL GRID LOCATION 11C19; GUN 001-005; Open these circuit breakers and attach a DO-NOT-CLOSE tag: 1) 11K5, THRUST REVERSER IND 2) 11K6, THRUST REVERSER CONT 3) 11K32, THRUST REVERSER IND 4) 11K33, THRUST REVERSER CONT

 (b)  
AIRPLANES WITH THE "LANDING GEAR POS SYS 2 ALTN" CIRCUIT BREAKER INSTALLED AT PANEL GRID LOCATION 11C19; GUN 006-999; Open these circuit breakers and attach a DO-NOT-CLOSE tag: 1) 11B29, ENGINES RIGHT T/R IND 2) 11B30, ENGINES RIGHT T/R CONT 3) 11C19, LANDING GEAR POS 2 ALTN 4) 11D11, ENGINES LEFT T/R IND 5) 11D12, ENGINE T/R CONT- L

 S 014-004
 (4)  
Open the access door, 119BL, to get access to the APU external power panel, P34, and the PSEU (Ref 06-41-00).

 S 864-005

 (5)  
Open this circuit breaker on the APU external power panel, P34, and attach a DO-NOT-CLOSE tag:

 (a)  
34A5, CARGO DOOR CONT

 D.
Remove the Circuit Cards

 S 914-006
 CAUTION: DO NOT TOUCH THE CIRCUIT CARD BEFORE YOU DO THE PROCEDURE FOR
_______
 DEVICES THAT ARE SENSITIVE TO ELECTROSTATIC DISCHARGE.
 ELECTROSTATIC DISCHARGE CAN CAUSE DAMAGE TO THE PSEU.

 (1)  
Do the procedure for devices that are sensitive to electrostatic discharge (Ref 20-41-01).

 S 024-007

 (2)  
Do the steps that follow to remove the circuit cards:

 (a)  
ALL THE CIRCUIT CARDS EXCEPT THE TWO BITE CARDS; Open the left or right front panel of the PSEU.

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 1) Write down the card number and location for each circuit card. 2) Operate the card extractors and pull the circuit cards out of the chassis.
 (b)  THE BITE CARDS; Loosen the captive fasteners for the BITE module assembly. 1) Remove the BITE module assembly from the chassis.
 TASK 32-09-06-404-008
 3.  Install the Circuit Card in the Proximity Switch Electronics Unit (Fig. 401)____________________________________________________________
　
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