(2) If the fault continues:
- do a check of the wiring from F/O PFD (2WT2) pins AA/49, 50, 51 to F/O PFD potentiometer (7WT2) pins A/1, 2, 3 (Ref. ASM 31-68/01).
(a) If there is continuity:
- replace the PFD-F/O (2WT2) (Ref. AMM TASK 31-63-22-000-001) and (Ref. AMM TASK 31-63-22-400-001).
1 If the fault continues:
_
- replace the POT-PFD, F/O (7WT2) (Ref. IPC 316808).
(b) If there is no continuity:
- repair the wiring from F/O PFD (2WT2) pins AA/49, 50, 51 to F/O PFD potentiometer (7WT2) pins A/1, 2, 3.
「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 : 001-049, 051-099, 101-149, 151-199, ∞∞31-63-82∞∞∞∞∞∞∞∞∞∞Page 221
201-299, 301-399, Aug 01/05 CES
B. If the F/O PFD stays off and if the EIS DMC selector switch (18WT) on the SWITCHING panel 8VU is at F/O/3:
(1) Do a check for 28VDC at pin AA/93 of the F/O PFD (2WT2) (Ref. ASM 31-61/02).
(a) If there is 28VDC:
- replace the PFD-F/O (2WT2) (Ref. AMM TASK 31-63-22-000-001) and (Ref. AMM TASK 31-63-22-400-001).
(b) If there is no 28VDC:
- do a check for a ground signal at pin AA/106 of the F/O PFD (2WT2).
1 If there is no ground signal:
_
- repair the wiring from F/O PFD (2WT2) pin AA/106 to the ground terminal.
2 If there is a ground signal:
_
- do a check of the wiring from F/O PFD (2WT2) pin AA/93 to the circuit breaker (22WT2).
a If there is no continuity:
_ - repair the wiring.
b If there is continuity:
_ - replace the C/B-EIS/PFD/F/O/SWTG (22WT2).
(2) If the fault continues:
- do a check for 115VAC at pin AC/2 of the DMC3 (1WT3) (Ref. ASM 31-61/02).
(a) If there is 115VAC:
- replace the DMC-3 (1WT3) (Ref. AMM TASK 31-63-34-000-001) and (Ref. AMM TASK 31-63-34-400-001).
(b) If there is no 115VAC:
- do a check for a ground signal at pin AC/7 of the DMC3 (1WT3).
1 If there is no ground signal:
_
- repair the wiring from DMC3 (1WT3) pin AC/7 to the ground terminal.
2 If there is a ground signal:
_ - replace the RELAY-BUS1 TO ESS BUS SWTG, DMC3 (26WT).
a If the fault continues:
_
- replace the C/B-EIS/DMC3/SPLY (10WT3). . If the fault continues:
* do a check of the wiring from the DMC3 BUS1 TO ESS BUS SWTG relay (26WT):
- pin A2 to DMC3 (1WT3) pin AC/2
「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 : 001-049, 051-099, 101-149, 151-199, ∞∞31-63-82∞∞∞∞∞∞∞∞∞∞Page 222
201-299, 301-399, Aug 01/05 CES - pin A3 to the EIS/DMC3/SPLY circuit breaker (10WT3)
* repair the wiring which has no continuity.
(3) If the fault continues:
- do a check for 28VDC at pin AC/3 of the DMC3 (1WT3) (Ref. ASM 31-61/02).
(a) If there is 28VDC:
- replace the DMC-3 (1WT3) (Ref. AMM TASK 31-63-34-000-001) and (Ref. AMM TASK 31-63-34-400-001).
(b) If there is no 28VDC:
- do a check for a ground signal at pin AC/11 of the DMC3 (1WT3) (Ref. ASM 31-61/02).
1_ If there is no ground signal:
- repair the wiring from DMC3 (1WT3) pin AC/11 to the ground
terminal.
2 If there is a ground signal:
_
- do a check of the wiring from DMC3 (1WT3) pin AC/3 to the circuit breaker (21WT3) (Ref. ASM 31-61/02).
a If there is no continuity:
_
- repair the wiring. b If there is continuity:
_ - replace the C/B-EIS/DMC3/SWTG (21WT3).
(4) If the fault continues:
- do a check for a ground signal at pin AB/8H, 4C of the DMC2 (1WT2).
(a) If there is no ground signal:
- do a check for a ground signal at pin AA/4 of the EIS DMC selector switch (18WT) (Ref. ASM 31-68/02).
1 If there is no ground signal:
_
- replace the SEL SW-EIS DMC (18WT). 2 If there is a ground signal:
_
- do a check of the wiring from EIS DMC selector switch (18WT) pin 4 to DMC2 (1WT2) pin AB/8H, 4H.
a If there is no continuity:
_
- repair the wiring. b If there is continuity:
_
- replace the DMC-2 (1WT2) (Ref. AMM TASK 31-63-34-000-001) and (Ref. AMM TASK 31-63-34-400-001).
「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 : 001-049, 051-099, 101-149, 151-199, ∞∞31-63-82∞∞∞∞∞∞∞∞∞∞Page 223
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本文链接地址：A320 Trouble Shooting Manual 排故手册 指示和记录系统 3(106)
