128.

 (2)
 Open the access door (Ref. TASK 52-41-00-010-002) 824.

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 Subtask 23-33-31-865-050
 B. Open, safety and tag this(these) circuit breaker(s):
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------

R 123VU BUS 2/210XP/SPLY 7XN2 AF02
 4. Procedure
_________
 (Ref. Fig. 401/TASK 23-33-31-991-001)
 Subtask 23-33-31-020-050

 A. Removal of the Main Multiplexer PES
 (1)
 Loosen the nut (3).

 (2)
 Lower the nut (3).

 (3)
 Pull the multiplexer (5) on its rack (2) to disconnect the electrical connectors (1).

 (4)
 Remove the multiplexer (5) from its rack (2).

 (5)
 Put blanking caps on the disconnected electrical connectors (1).

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 PES Main Multiplexer
 Figure 401/TASK 23-33-31-991-001
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1  1  Feb 01/98
 1  1
 1CES  1

 TASK 23-33-31-400-001
 Installation of the Passenger Entertainment System Main Multiplexer (8MK)

 1.
 Reason for the Job

__________________
 Self Explanatory

 2.
 Job Set-up Information

______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific access platform 1.6 m (5 ft. 3 in.)
 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
23-33-00-740-002 BITE-Test of the Passenger Entertainment System
 (Music) with the Programming and Test Panel (PTP) R 23-33-00-820-001 Adjustment of the DIP - Switch Positions of the Main R Multiplexer (8MK)
 52-41-00-410-002 Close the Avionics Compartment Doors after Access
 3. Job Set-up
__________
 Subtask 23-33-31-860-050

 A. Aircraft Maintenance Configuration
 (1)
 Make sure that the access platform is in position at the access door 824 in zone 128.

 (2)
 Make sure that the access door 824 is open.

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 B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
123VU BUS 2/210XP/SPLY 7XN2 AF02
 4. Procedure
_________ Subtask 23-33-31-420-050
 A. Installation of the PES Main Multiplexer
 (1)
 Clean the component interface and/or the adjacent area.

 (2)
 Do an inspection of the component interface and/or the adjacent area.

 (3)
 Remove the blanking caps from the electrical connectors (1).

 (4)
 Make sure that the electrical connectors (1) are clean and in the correct condition.

 (5)
 Install the multiplexer (5) on its rack (2).

 (6)
 Push the multiplexer (5) on its rack (2) to connect the electrical connectors (1).

 (7) Engage the nut (3) on the lug (4) and tighten. Subtask 23-33-31-865-052
 B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 7XN2
 Subtask 23-33-31-740-050
 C. Do the BITE test of the PES Main Multiplexer (Ref. TASK 23-33-00-740-002).
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 Subtask 23-33-31-820-050 
R R R  D. Do the adjustment of the Dual In-line Package (DIP) (Ref. TASK 23-33-00-820-001). If there is no DIP Switch: go to 23-33-31 PB 301 for the configuration of the Main Multiplexer.
 5. Close-up________
 Subtask 23-33-31-410-050
 A. Close Access
 (1) Make sure that the work area is clean and clear of tool(s) and other items.
 (2) Close the access door 824 (Ref. TASK 52-41-00-410-002).
　
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