(a) If there is a voltage:

 - replace the defective dome-light lamp (8LS) (Ref. AMM TASK 33-35-11-400-002).

 (b) If there is no voltage:

 - replace the RELAY-PWR SPLY, AVIONICS COMPT FWD R LT CTL (25LS) (Ref. IPC 333508).
 1 If the fault continues:
_
 - do a check for continuity between the pins A2 and B2 of the power supply relay (25LS).
 a If there is no continuity:
_
 - repair the wiring between the pin A2 of the power supply relay (25LS) and the first terminal block (Ref. ASM 33-35/01).
 b If there is continuity:
_
 - repair the wiring between the power supply relay (25LS) and the lateral right dome light (8LS) (Ref. ASM 33-35/01).
 (3) The lamp of the lateral left avionics-compartment dome-light does not operate correctly:
 - remove the LT-DOME, AVIONICS COMPT LAT L (22LS) (Ref. AMM TASK 33-35-11-000-002)

 - make sure that there is a voltage at the lamp socket.

 (a) If there is a voltage:

 - replace the defective dome-light lamp (22LS) (Ref. AMM TASK 33-35-11-400-002).

 (b) If there is no voltage:

 - replace the RELAY-PWR SPLY, AVIONICS COMPT AFT L LT CTL (24LS) (Ref. IPC 333508).
 1 If the fault continues:
_
 - do a check for continuity between the pins A2 and B2 of the power supply relay (24LS).
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞33-35-00∞∞∞∞∞∞∞∞∞∞Page 202
 Feb 01/98 CES b If there is continuity:

 a_ If there is no continuity:
 - repair the wiring between the pin A2 of the power supply
 relay (24LS) and the first terminal block (Ref. ASM 33-
35/01).

_
 - repair the wiring between the power supply relay (24LS) and the lateral left dome light (22LS) (Ref. ASM 33-35/01).
 B. Do the test given in Para. 3.

 TASK 33-35-00-810-802

 Failure of the Avionics Compartment Dome Lights
 1. Possible Causes
_______________
 - P/BSW-AVIONICS COMPT LT (23LS)

 - wiring

 - C/B - LIGHTING/AVNCS COMPT/DOME (1LS)

 - C/B-LIGHTING/AVNCS COMPT/DOME (1LS)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
IPC 333508 AMM 33-35-00-720-001 Functional Test of the Avionics-Compartment Lighting ASM 33-35/01
 3. Fault Confirmation
__________________
 A. Test Do the functional test of the equipment compartment lighting (Ref. AMM TASK 33-35-00-720-001).
 4. Fault Isolation
_______________
 A. If, during the functional test, when you push the avionics-compartment light pushbutton-switch (23LS), the integral lighting system is inoperative:
 - do a check of the circuit breaker (1LS) status:

 (1) If the circuit breaker is closed:
 - do a check for 28VDC at pins A/B3, C3 of the pushbutton switch (23LS) (Ref. ASM 33-35/01).
 (a) If there is 28VDC:
 - replace the P/BSW-AVIONICS COMPT LT (23LS) (Ref. IPC 333508).
 1 If the fault continues:
_
 - do a check and repair the wiring between the pins A/A2, B2 of the power supply relays (24LS) and (25LS) and the circuit breaker (1LS).
 (b) If there is no 28VDC:
 - do a check for 28VDC at pins A/A2, B2 of the power supply relays (24LS) and (25LS).
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞33-35-00∞∞∞∞∞∞∞∞∞∞Page 204
 Feb 01/98 CES 2 If there is no 28VDC:

 1_ If there is 28VDC:
 - do a check and repair the wiring between the pins A/B3, C3
 and the circuit breaker (1LS).

_
 - replace the C/B - LIGHTING/AVNCS COMPT/DOME (1LS)
 (2) If the circuit breaker is open:
 - close the circuit breaker (1LS).
 (a) If the circuit breaker trips:
 - replace the P/BSW-AVIONICS COMPT LT (23LS) (Ref. IPC 333508). 1 If the fault continues:
_
 - do a check for a short to ground at the wiring between the circuit breaker (1LS) and the avionics-compartment dome lights (Ref. ASM 33-35/01).
 a If there is a short to ground:
_
 - repair the related wiring. b If there is no short to ground:
_ - replace the C/B-LIGHTING/AVNCS COMPT/DOME (1LS).
　
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