4. Fault Isolation _______________ A. If the test gives a different maintenance message, do the trouble shooting procedure related to the maintenance message. B. If the related NS/FSB info signs do not come on: - do a check for 28 VDC at the related LIGHT PNL pins 1 and 3 (Ref. ASM 23-73/13) (Ref. ASM 23-73/14), (Ref. ASM 23-73/15) and (Ref. ASM 2373/16). (1) If there is approx. 28 VDC and the related NS/FSB sign has lamps: - replace the related lamps. (a) If the fault continues: - replace the LIGHT PNL (Ref. AMM TASK 23-73-63-000-001) and (Ref. AMM TASK 23-73-63-400-001). (2) If there is no 28 VDC: - replace the related DEU-A (Ref. AMM TASK 23-73-46-000-001) and (Ref. AMM TASK 23-73-46-400-001). (a) If the fault continues: - do a check and repair the wiring between the related: LIGHT PNL pin 1 and DEU-A connector C/22,C/24 or C/26, LIGHT PNL pin 2 and DEU-A connector C/18,C/19 or C/20, LIGHT PNL pin 3 and DEU-A connector C/21,C/23 or C/25 (Ref. ASM 23-73/13) (Ref. ASM 23-73/14), (Ref. ASM 23-73/15) and (Ref. ASM 23-73/16). C. Do the test given in Para. 3.A.
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EFF : 001-049, 051-099, 101-105, 151-199, 201-299, CES
∞ 23-73-00∞∞ ∞ ∞ ∞ Aug 01/05 ∞ Page 266
飞行翻译公司 www.aviation.cn 本文链接地址：A319 A320 A321 排故手册 TSM Trouble Shooting Manual 06_部分3.pdf
R
EFF : 001-049, 051-099, 101-105, 151-199, 201-299, CES
∞ 23-73-00∞∞ ∞ ∞ ∞ Aug 01/05 ∞ Page 266
飞行翻译公司 www.aviation.cn 本文链接地址：A319 A320 A321 排故手册 TSM Trouble Shooting Manual 06_部分3.pdf
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