TB 1-1730-229-20-2
the DC Voltage light DS18 from the 28 vdc press-to-test signal from TB2. (See Figure D,
attached.)
- Rewiring of the DC Over Current lamp DS19 to indicate an overheat condition in the TRU. A
constant 28 VDC signal is obtained from the AC Power ON switch DS20 through wire X47E20.
Ground is established by wire X5X16 from J20 on the TRU or through wires 53E20 and 53E20A
and diode CR6X, in TB1 for the press-to-test indication. (See Figure E, attached.)
FO-5D DC POWER GENERATION AND CONTROL SYSTEM SCHEMATIC/WIRING
DIAGRAM, 83-360D
Changes in this new wiring diagram will include:
- Connecting the TRU AC input ground wire X1X16 and the DC output ground wire P1A2/0NA
to the DC ground stud. The 28 vdc output wire P2A2/0A is connected to the line side of the DC
contactor K2. (See Figure F, attached.)
- Disconnecting wires P14A20 and P38B20 from the GCU to the DC Contactor (K2) and install
a jumper wire P2E20A from B1 to X1. This allows the DC contactor to close by the DC Power
switch without regard to the conditions of the DC power. (See Figure F, attached.)
- Disconnecting ground wire P53D20N from the DC Voltage light DS18 and DC Over Current
light DS19. Re-establish the ground for the DC Power On light DS21 from DC Volt meter M11
through wire P53B20NA. (See Figure G, attached.)
FO-6D AC POWER GENERATION & CONTROL SYSTEM SCHEMATIC/WIRING
DIAGRAM, 83-360D
Changes in this new wiring diagram will include:
- Connecting the TRU input J20 to the line/generator side of the AC contactor K1 with wires
X2X12, X3X12, AND X4X12. (See Figure H, attached).
- Installation of a jumper wire X48F20 to maintain the GCU in the AC mode regardless of the
position of the CURRENT LIMIT SELECTOR switch S11. (See Figure I, attached.)
- This wiring diagram will also be changed to show the operation of the surge control valve in
all AGPUs.
FO-7D DC PNEUMATIC CONTROL SYSTEM SCHEMATIC/WIRING DIAGRAM,
83-360D
This wiring diagram will be changed to add jumper wire H1D20A allowing the surge
control valve to be controlled by the CURRENT LIMIT SELECTOR switch S11, independent of
the PNEUMATIC POWER SWITCH S8 (See Figure J, attached.)
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