TM 1-1520-238-T-7 10–42 Change 5 10–7. SYSTEM DESCRIPTION (cont) 10–7 FUEL  TRANSFER  AIR  VALVE 1 2 4 3 5 TO  AFT OFF TO  FWD PILOT  FUEL  PANEL OFF CR19 CR18 3 2 1 4 5 6 FWD AFT OFF 6 5 4 3 2 1 ORIDE SW 9 8 7 CPG  FUEL  PANEL CB56 FUEL TRANS TRANS  SW TRANS SW MULTI-CHANNEL DIMMING CONTROLLER FUEL  XFR  /  XFER PILOT  AND  CPG INSTRUMENT  PANELS S1 S3 BRAKE S4 AFT DIRECTION FWD DIRECTION S2 S4 S3 S3 M RELAY  K5-9 FUEL  XFR RELAY  K5 PILOT  AND  CPG CAUTION/WARNING  PANELS ADA ADB M70-207 Figure   10–16. Fuel Transfer Electrical Schematic SDC AFT  FUEL CELL  SENSOR FWD  FUEL CELL  SENSOR PILOT DIM/TEST PANEL PILOT  EXT  LT  / INTR  LT  PANEL FSC FUEL QUANTITY INDICATOR OPERATING  /  LAMP  SUPPLY  VOLTAGES FUEL  CELL  DATA FUEL  CELL  DATA DISPLAY  LAMP  TEST DIGITAL  BLANKING DISPLAY  LAMP  DIM  /  BRIGHT  AUTOMATIC  CONTROL PANEL  EDGE-LIGHTING DC DC M70-210 Figure   10–17. Fuel Quantity Indicator Functional Block Diagram