- do a check and repair the wiring between the CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM (24MQ) connector B/B and the KEYPAD (25MQ) connector A/2 (Ref. ASM 52-51/01).
- do a check and repair the wiring between the CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM (24MQ) connector B/C and the KEYPAD (25MQ) connector A/3 (Ref. ASM 52-51/01).
- do a check and repair the wiring between the CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM (24MQ) connector B/D and the KEYPAD (25MQ) connector A/4 (Ref. ASM 52-51/01).
b If there is continuity:
_
- replace the CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM (24MQ) (Ref. AMM TASK 52-51-13-000-001) and (Ref. AMM TASK 52-51-13-400-001).
R **ON A/C 106-149, 215-299, 301-399, 401-499,
A. If the buzzer at the cockpit ceiling panel 211HC does not come on:
- enter the emergency entry code and make sure that the green LED at the KEYPAD (25MQ) flashes.
(1) If the green LED at the KEYPAD (25MQ) flashes:
- do a check of 28 VDC at the BUZZER (23MQ).
(a) If there is no 28 VDC:
- do a check for continuity between the BUZZER (23MQ) and the CB(1MQ) (Ref. ASM 52-51/01).
1 If there is no continuity:
_
- do a check and repair the wiring between the BUZZER (23MQ) and the CB(1MQ) (Ref. ASM 52-51/01).
2 If there is continuity:
_
- do a check for continuity between the CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM (24MQ) connector A/C and the BUZZER (23MQ) (Ref. ASM 52-51/01).
a If there is continuity:
_
- replace the CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM (24MQ) (Ref. AMM TASK 52-51-13-000-001) and (Ref. AMM TASK 52-51-13-400-001).
b If there is no continuity:
_
- do a check and repair the wiring between the BUZZER (23MQ) and the CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM (24MQ) connector A/C (Ref. ASM 52-51/01).
「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 ∞∞52-51-00∞∞∞∞∞∞∞∞∞∞Page 206
Aug 01/05 CES (b) If there is 28 VDC:
- do a check for continuity on the BUZZER (23MQ).
1 If there is no continuity:
_
- replace the BUZZER (23MQ) (Ref. AMM TASK 52-51-13-000-001) and (Ref. AMM TASK 52-51-13-400-001).
2 If there is continuity:
_
- replace the CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM (24MQ) (Ref. AMM TASK 52-51-13-000-001) and (Ref. AMM TASK 52-51-13-400-001).
(2) If the green LED at the KEYPAD (25MQ) does not flash:
- do a check of voltage between the pins G and K of the CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM (24MQ).
(a) If there is no voltage:
- replace the CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM (24MQ) (Ref. AMM TASK 52-51-14-000-001) and (Ref. AMM TASK 52-51-14-400-001).
(b) If there is voltage:
- do a check of voltage between the KEYPAD (25MQ) connectors A/15 and A/8 (Ref. ASM 52-51/01).
1 If there is no voltage:
_
- do a check and repair the wiring between: the KEYPAD (25MQ) connector A/15 and CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM (24MQ) connector B/G (Ref. ASM 52-51/01). the KEYPAD (25MQ) connector A/8 and CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM (24MQ) connector B/K (Ref. ASM 52-51/01).
2 If there is voltage:
_
- do a check for continuity between the CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM (24MQ) connector B/E and the KEYPAD (25MQ) connector A/9 (Ref. ASM 52-51/01).
- do a check for continuity between the CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM (24MQ) connector B/F and the KEYPAD (25MQ) connector A/10 (Ref. ASM 52-51/01).
a If there is no continuity:
_
- do a check and repair the wiring between the CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM (24MQ) connector B/E and the KEYPAD (25MQ) A/9 (Ref. ASM 52-51/01).
- do a check and repair the wiring between the CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM (24MQ) connector B/F and the KEYPAD (25MQ) A/10 (Ref. ASM 52-51/01).
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 106-149, 215-299, 301-399, 401-499, ∞∞52-51-00∞∞∞∞∞∞∞∞∞∞Page 207
Aug 01/05 CES b If there is continuity:
_
- replace the KEYPAD (25MQ) (Ref. AMM TASK 52-51-15-000-001) and (Ref. AMM TASK 52-51-15-400-001).
(c) If the fault continues:
- do a check for continuity between the CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM (24MQ) connector B/A and the KEYPAD (25MQ) connector A/1 (Ref. ASM 52-51/01).
- do a check for continuity between the CONTROL UNIT-COCKPIT DOOR LOCKING SYSTEM (24MQ) connector B/B and the KEYPAD (25MQ) connector A/2 (Ref. ASM 52-51/01). 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 舱门 DOORS(122)
