B. The defective annunciator-light test and interface-board is isolated:
- replace the related annunciator-light test and interface-board (Ref. AMM TASK 33-14-33-000-001) and (Ref. AMM TASK 33-14-33-400-001).
(1) If the fault continues:
- do a check and repair the related wiring (Ref. ASM 33-14/02).
C. The defective transformer 36LP is 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 18LP to 20LP) (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 (18LP) or (19LP) or (20LP) (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/47 of the annunciator light test and interface board (18LP) to the first terminal block . from the pin A/49 (18LP) and the pin A/50 (20LP) of the annunciator-light test and interface-boards to the ground terminal (Ref. ASM 33-14/02).
(3) If the fault continues
- replace the XFMR-SYS 2 (36LP) (Ref. AMM TASK 33-14-51-000-001) and (Ref. AMM TASK 33-14-51-400-001).
(4) If the fault continues
- do a check for 115VAC at pin A/A2 of the control relay (39LP) (Ref. ASM 33-14/03).
(a) If there is 115VAC
- replace the CTL-RELAY (39LP) (Ref. IPC 331408).
1 If the fault continues
_
- do a check of the wiring between the relay (39LP) pin A/A3 and the pin A/A of the transformer (36LP) (Ref. ASM 33-14/03).
a If there is no continuity
_ - repair the above wiring.
b If there is continuity
_
- repair the wiring between the related transformer pin A/C and the ground terminal (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 206
Feb 01/98 CES (b) If there is no 115VAC
- do a check of the related circuit breaker status (27LP).
1 If the circuit breaker is closed
_
- do a check of the wiring between pin A/A2 of the control relay (39LP) and the circuit breaker (27LP) (Ref. ASM 33-14/03).
a If there is no continuity
_ - repair the above wiring.
b If there is continuity
_ - replace the C/B-LIGHTING/ANN LT SPLY/XFMR/BUS 2 (27LP).
2 If the circuit breaker is open
_ - close the circuit breaker.
D. The defective transformer 31LP or 35LP or 37LP is isolated:
- replace the related XFMR-ESS (31LP) or XFMR-ESS (35LP) or XFMR-SYS 1 (37LP) (Ref. AMM TASK 33-14-51-000-001) and (Ref. AMM TASK 33-14-51-400-001).
(1) If the fault continues:
- do a check for 115VAC at pin A/A2 of the related control relay (Ref. ASM 33-14/03).
(a) If there is 115VAC
- replace the related CTL-RELAY (38LP, 41LP or 42LP) (Ref. IPC 331408).
1 If the fault continues:
_
- do a check of the wiring between the related relay (38LP, 41LP or 42LP) pin A/A3 and the related transformer (37LP, 31LP or 35LP) pin A/A (Ref. ASM 33-14/03).
a If there is no continuity
_ - repair the above wiring.
b If there is continuity
_
- repair the wiring between the related transformer pin A/C and the ground terminal (Ref. ASM 33-14/03).
2 If the fault continues:
_
- do a check for 115VAC at pin A/A3 of the relay (40LP) (Ref. ASM 33-14/03)
a If there is 115VAC:
_
- replace the RELAY-ESS/EMERGENCY (40LP). . If the fault continues:
- do a check of the wiring between the relay (40LP) pin A/A2 and the relay (42LP) pin A/A2. .. If there is no continuity:
「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 207
Feb 01/98 CES
- repair the above wiring.
b If there is no 115VAC:
_
- do a check of the circuit breaker status (28LP). . If the circuit breaker is closed:
- do a check of the wiring between the relay (40LP) pin A/A3 and the circuit breaker (28LP). .. If there is no continuity:
- repair the above wiring. .. If there is continuity:
- replace the C/B-LIGHTING/ANN LT SPLY/XFMR/STAT INV (28LP) . If the circuit breaker is open:
- close the circuit breaker. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320 Trouble Shooting Manual 排故手册 LIGHTS 灯光(32)
