3. Fault Confirmation
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A. At the COCKPIT overhead panel 56VU, push the SWITCH/INDICATOR (54HP) switch.
4. Fault Isolation
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A. If the ON legend in the SWITCH/INDICATOR (54HP) switch does not come on, do the procedure that follows (Ref. TSM 25-21-00 P.Block 301).
(1) Use the MULTIMETER - STANDARD to do a check for continuity of each ON legend lamp.
(a) If the lamp(s) is unserviceable:
- replace the defectice lamp.
(b) If the lamp(s) is serviceable, do a check of the A/C wiring (Ref. ASM 25-21/00):
- disconnect the connector A from the connector 2793VC
- disconnect the connector F from the MCU 55HP
- use the MULTIMETER - STANDARD to do a check of the aircraft wiring:
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 R EFF : 301-399, 401-499, ∞∞25-21-00∞∞∞∞∞∞∞∞∞∞Page 205
Aug 01/05 CES .between the connector 2793VC-A and the MCU 55HP .between the connector 2793VC-A and the related terminals of the switch .between the MCU 55HP and the related terminals of the circuit breaker 50HP
- repair and replace as necessary.
(c) If there is no fault in the aircraft wiring:
- replace the CB/50HP.
(d) If the fault continues, do the trouble shooting of the CIDS (Ref. TSM 23730002).
B. Do the test given in Para. 3.
No Electrical Power from FWD Master Control Unit (MCU)
1. Possible Causes
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- MASTER CONTROL UNIT- SEAT POWER SUPPLY (55HP)
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
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REFERENCE QTY DESIGNATION
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No specific 1 MULTIMETER - STANDARD
B. Referenced Information
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REFERENCE DESIGNATION
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AMM 25-21-34-000-001 Removal of the Master Control Unit (MCU)
AMM 25-21-34-400-001 Installation of the Master Control Unit (MCU)
TSM 25-21-00 P.Block 301 PASSENGER COMPARTMENT SEATS
3. Fault Confirmation
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A. Make sure that the PED POWER switch 56HP at the purser station (VCC or near FAP) is in the ON position.
4. Fault Isolation
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A. If there is no electrical power from the MCU 55HP, do the procedure as follows (Ref. TSM 25-21-00 P.Block 301):
(1) At the MCU 55HP:
- Disconnect the applicable connector.
- Use the MULTIMETER - STANDARD and do the check to make sure that 115V AC is available at the applicable power outlet of the MCU 55HP.
(2) If there is no 115V AC available, replace the MASTER CONTROL UNIT-SEAT POWER SUPPLY (55HP) (Ref. AMM TASK 25-21-34-000-001) and (Ref. AMM TASK 25-21-34-400-001).
B. Do the test as given in Para. 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 R EFF : 301-399, 401-499, ∞∞25-21-00∞∞∞∞∞∞∞∞∞∞Page 207
Aug 01/05 CES PED Supply is not available at one Seat Assembly
1. Possible Causes
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- power converter
- seat to seat harness
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
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REFERENCE QTY DESIGNATION
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No specific 2 MULTIMETER - STANDARD
B. Referenced Information
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REFERENCE DESIGNATION
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AMM 25-21-42-000-001 Removal of the In-Seat Power-Supply (ISPS) Unit AMM 25-21-42-400-001 Installation of the In-Seat Power-Supply (ISPS) Unit TSM 25-21-00 P.Block 301 PASSENGER COMPARTMENT SEATS
3. Fault Confirmation
__________________
A. Use the MULTIMETER - STANDARD and check for PED power supply at the related seat group (Ref. TSM 25-21-00 P.Block 301). 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 EQUIPMENT/FURNISHINGS(13)
