1EFF : ALL 1 23-43-00Page 503 1 1 Aug 01/05 1 1 1CES 1 **ON A/C ALL

 4. Procedure
_________
 **ON A/C 001-049, 051-099, 101-149, 201-299,

 Subtask 23-43-00-710-050
 A. Operational test of the cabin and flight crew interphone system is included in the Cabin Intercommunication Data System (CIDS) test (Ref. TASK 23-73-00-710-003).

R **ON A/C 151-199, 301-399, 401-499,
 Subtask 23-43-00-710-050-A
 A. Operational test of the cabin and flight crew interphone system is included in the Cabin Intercommunication Data System (CIDS) test (Ref. TASK 23-73-00-710-021).
 **ON A/C ALL
 5. Close-up
________
 Subtask 23-43-00-862-050

 A. De-energize the aircraft electrical circuit (Ref. TASK 24-41-00-862-002).
 1EFF : ALL 1 23-43-00Page 504 1 1 Aug 01/05 1 1 1CES 1

 CABIN AND SERVICE INTERPHONE - DESCRIPTION AND OPERATION
________________________________________________________
 1.
 General

_______ The service interphone system provides the telephone communication on the ground between the flight crew, the cabin crew and the ground service personnel. Eight service interphone jacks are installed at different locations on the aircraft. The service personnel use them to speak to each other, the cockpit and the attendant stations through handsets.

 2.
 Component Location

__________________

R **ON A/C 001-049, 051-099, 101-105, 151-199, 201-299,
 (Ref. Fig. 001)
 -------------------------------------------------------------------------------FIN | FUNCTIONAL DESIGNATION | PANEL|ZONE|ACCESS | ATA | | | | DOOR | REF. -------------------------------------------------------------------------------1RJ JACK-MAINTENANCE INTERPHONE, FWD 121 811 23-44-00 AVIONICS COMPT 2RJ JACK-MAINTENANCE INTERPHONE, R 126 822 23-44-00 AVIONICS COMPT 3RJ JACK-MAINTENANCE INTERPHONE, AFT 63VU 128 824 23-44-00
 AVIONICS COMPT 11RJ JACK-MAINTENANCE INTERPHONE 2025VU 141 23-44-00 13RJ JACK-MAINTENANCE INTERPHONE 312 23-44-00 14RJ JACK-MAINTENANCE INTERPHONE 312 23-44-00 15RJ P/BSW-SERVICE INTERPHONE OVRD 50VU 212 831 23-44-00
 4000RJ1 JACK-MAINTENANCE INTERPHONE ENGINE 1 410 23-44-41 4000RJ2 JACK-MAINTENANCE INTERPHONE ENGINE 2 420 23-44-41
 1EFF : ALL 1 23-44-00Page 1 1 1 May 01/05 1 1 1CES 1

 Service Interphone System - Component Location Figure 001 (SHEET 1)
R 1EFF : 001-049, 051-099, 101-105, 151-199, 1 23-44-00Page 2 1201-299, 1May 01/05 1 1 1CES 1

 Service Interphone System - Component Location Figure 001 (SHEET 2)
R 1EFF : 001-049, 051-099, 101-105, 151-199, 1 23-44-00Page 3 1201-299, 1May 01/05 1 1 1CES 1R **ON A/C 106-149, 301-399, 401-499,

 (Ref. Fig. 001A)
 -------------------------------------------------------------------------------FIN | FUNCTIONAL DESIGNATION | PANEL|ZONE|ACCESS | ATA | | | | DOOR | REF. -------------------------------------------------------------------------------1RJ JACK-MAINTENANCE INTERPHONE, FWD 121 811 23-44-00 AVIONICS COMPT 2RJ JACK-MAINTENANCE INTERPHONE, R 126 822 23-44-00 AVIONICS COMPT 3RJ JACK-MAINTENANCE INTERPHONE, AFT 63VU 128 824 23-44-00
 AVIONICS COMPT 4RJ1 ISOLATION UNIT 126 23-44-42 4RJ2 ISOLATION UNIT 87VU 127 23-44-42 4RJ3 ISOLATION UNIT 132 132PW 23-44-42 4RJ4 ISOLATION UNIT 138 132PW 23-44-42 4RJ5 ISOLATION UNIT 312 312AR 23-44-42
 11RJ JACK-MAINTENANCE INTERPHONE 2025VU 141 23-44-00 13RJ JACK-MAINTENANCE INTERPHONE 312 23-44-00 14RJ JACK-MAINTENANCE INTERPHONE 312 23-44-00 15RJ P/BSW-SERVICE INTERPHONE OVRD 50VU 212 831 23-44-00 4000RJ1 JACK-MAINTENANCE INTERPHONE ENGINE 1 410 23-44-41 4000RJ2 JACK-MAINTENANCE INTERPHONE ENGINE 2 420 23-44-41
 **ON A/C ALL
 3. Description
___________
 **ON A/C 001-049, 051-099, 101-105, 151-199, 201-299,
 (Ref. Fig. 002)
 The service interphone system has:

 -Eight maintenance interphone jacks
 -A service-interphone OVERRIDE pushbutton-switch, with an integral
 indicator light. The audio lines from the maintenance interphone jacks are routed to the amplifiers in both Cabin Intercommunication Data System (CIDS) directors. The system gets signals for the operation and the control light from:
 -
The Landing Gear Control and Interface Units (LGCIUs) 5GA1 and 5GA2

 -
The SVCE INT OVRD pushbutton switch 15RJ

 -
The annunciator-light test and interface board 1LP

 -
The CIDS directors 101RH and 102RH.

 1EFF : ALL 1 23-44-00Page 4 1 1 Aug 01/05 1 1 1CES 1R **ON A/C 106-149, 301-399, 401-499,

 (Ref. Fig. 002A)
 The service interphone system has:
 -Eight maintenance interphone jacks
 -Five isolation units
　
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