(b) If there is no 115VAC
 - do a check of the related circuit breaker status (26LP) or (28LP) or (29LP).
 1 If the circuit breaker is closed
_
 - do a check of the wiring between that pin and the related circuit breaker (26LP) or (28LP) or (29LP) (Ref. ASM 33-14/03).
 a If there is no continuity
_ - repair the above wiring
 b If there is continuity
_
 - replace the related C/B-LIGHTING/ANN LT SPLY/XFMR/BUS1 (26LP) or C/B- LIGHTING/ANN LT SPLY/XFMR/STAT INV (28LP) or C/B-LIGHTING/XFMR/115V.5V/ESS BUS (29LP)
 2 If the circuit breaker is open
_ - close the circuit breaker.
 E. The defective annunciator light test and interface boards from 1LP to 11LP are isolated:
 - do a check for continuity between pins A/47 and A/48 and between A/49 and A/50 of each related annunciator-light test and interface-board (from 1LP to 11LP)(Ref. ASM 33-14/02).
 (1) If there is no continuity at one of these boards:

 - replace the related annunciator-light test and interface-board (from 1LP to 11LP) (Ref. AMM TASK 33-14-33-000-001) and (Ref. AMM TASK 33-14-33-400-001).

 (2) If there is continuity at each board

 - do a check and repair the related wiring . between each annunciator-light test and interface-board . from the pin A/48 of the annunciator light test and interface board (1LP) to the first terminal block . from the pins A/50 of the annunciator light test and interface boards (1LP and 11LP) to the ground terminal (Ref. ASM 33-14/02).
 「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 ∞∞33-14-00∞∞∞∞∞∞∞∞∞∞Page 208
 Feb 01/98 CES F. All annunciator lights are off during the test

 - do a check of the circuit breaker (30LP) status.
 (1) If the circuit breaker is closed
 - do a check for 28VDC at pin 3B of the switch 33LP (Ref. ASM 33-14/02).
 (a) If there is 28VDC

 - repair the wiring from that pin to the first terminal block (Ref. ASM 33-14/02).

 (b) If there is no 28VDC

 - replace the SW-INT LT/ANN LT (33LP) (Ref. IPC 331408).
 1_ If the fault continues
 - do a check of the wiring between the circuit breaker (30LP)
 and the switch (33LP).

 a If there is no continuity
_
 - repair the above wiring (Ref. ASM 33-14/02). b If there is continuity
_ - replace the C/B LIGHTING/TST/BOARD/SPLY (30LP).
 (2) If the circuit breaker is open
 - close the circuit breaker (30LP).
 G. Do the test given in Para. 3.

 TASK 33-14-00-810-803

 Loss of the Dimming Function of the Annunciator Lights
 1. Possible Causes
_______________
 - XFMR-ESS (31LP)

 - XFMR-ESS (35LP)

 - XFMR-SYS 2 (36LP)

 - XFMR-SYS 1 (37LP)

 - RELAY-BRT/DIM, SYS 1 CTL (38LP)

 - RELAY-BRT/DIM, SYS 2 CTL (39LP)

 - RELAY-BRT/DIM, ESS CTL (41LP)

 - RELAY-BRT/DIM, ESS CTL (42LP)

 - wiring

 - RELAY-ESS/EMERGENCY (40LP)

 - SW-INT LT/ANN LT (33LP)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
IPC 331408 AMM 33-14-00-710-001 Operational Test of the Annunciator Light Test System
 in the Cockpit
 AMM 33-14-51-000-001 Removal of the Essential Transformers (31LP, 35LP)
 AMM 33-14-51-400-001 Installation of the Essential Transformers (31LP,

 35LP)
 ASM 33-14/02
 ASM 33-14/03
 33-14-00-991-003 Fig. 203

 3. Fault Confirmation
__________________
 A. Test
 (1) Do the operational test of the annunciator light test system (Ref. AMM TASK 33-14-00-710-001). (Ref. Fig. 203/TASK 33-14-00-991-003)
 4. Fault Isolation
_______________
 A. If the dimming is not operative for all annunciator lights related to a same transformer
 - make sure that the INT LT/ANN LT switch (33LP) is in the DIM position.

 - make sure that there is 115VAC at pin A/B of the related transformer (Ref. ASM 33-14/03).

 「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 ∞∞33-14-00∞∞∞∞∞∞∞∞∞∞Page 210
 Feb 01/98 CES

 Annunciator Light Test and Dimming
 Figure 203/TASK 33-14-00-991-003
　
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