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757
MAINTENANCE MANUAL
Airplane Wiring Harness and Tank Wiring Harness for the Left Main Fuel Tank
Figure 11D
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. GUN 001-010 ú
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FQIS PROCESSOR CONNECTOR LO-Z
757
MAINTENANCE MANUAL
9
10
RECEPTACLE
LO-Z
11
12 5
6
7
8
Lo-Z and Hi-Z Wiring for the Left Main Fuel Tank
(Simplified Schematic)
Figure 11E
FQIS PROCESSOR LEFT MAIN FUEL TANK
3
1 4
2 5
3 6
4 7 8 9
10 11 12
C
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757
MAINTENANCE MANUAL
(12)
The HI-Z bussing plug connects with the HI-Z receptacle of the tank wiring harness.
(13)
The LO-Z connector plug connects with the LO-Z receptacle of the tank wiring harness.
(14)
The tank wiring harnesses are installed and sealed within their respective fuel tanks.
(15)
The FQPU sends an 18.75 kHz excitation signal to the tank units and compensators through the LO-Z wiring.
(16)
The HI-Z wiring carries the return signal from the tank units and compensators to the FQPU.
(17)
The LO-Z wiring is individually routed from the FQPU to the tank units and compensators.
(18)
The HI-Z wiring is individually routed from the tank units and compensator to the HI-Z bussing plug. The HI-Z bussing plug combines all HI-Z center conductors and HI-Z shields into one common HI-Z wire which is routed to the FQPU.
(19)
The tank wiring harness does not require and is not authorized for any on-line or field calibration.
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