TM 9-4910-663-34 Table 2-2.  Preliminary Control Settings Control Reference Designation Position INSTRUMENT PANEL (fig 2-4) DC AMMETER LOAD & STARTER OUTPUT CURRENT S14 LOAD X10 BATTERY CHART CURRENT RANGE switch DC AMMETER LOAD & STARTER OUTPUT CURRENT S15 Off BATTERY CHARGE CURRENT PRESS FOR BAT- TERY CHARGE RATE switch DC AMMETER FIELD CURRENT RANGE switch S30 X6 MILLIVOLT METER MILLIVOLT DROP RANGE S16 X10 switch MILLIVOLT METER MILLIVOLT DROP PRESS S34 Off TO READ switch DC VOLTMETER OUTPUT VOLTAGE RANGE S12 X5 switch DC VOLTMETER OUTPUT VOLTAGE SELECT S11 REC GEN (P/N switch 7458-2) EXT (P/N 7458-4) TACHOMETER RPM SELECT switch S36 DIRECT DRIVE TACHOMETER RPM PULLEY CALIBRATION R35 Fully ccw control AC AMMETER OUTPUT CURRENT SELECT S25 T1 switch AC AMMETER OUTPUT CURRENT RAINCE S26 X5 switch AC VOLTMETER OUTPUT VOLTAGE SELECT S28 CIRCUIT T1- switch T2 AC VOLTMETER OUTPUT VOLTAGE RANGE S27 X2 switch CONTROL PANEL (fig 2-5) EXTERNAL FIELD EXCITER AC SYSTEMS switch S31 OFF GENERATOR FIELD switch S37 INT GND POLARITY REVERSING switch S7 NEG GND FIELD CIRCUIT switch S32 OFF FINE CONTROL 0-5 AMPS (MAX) switch S29 OFF FIELD CURRENT control (fine) R27 Fully ccw FIELD CURRENT 0-20 AMPS (MAX) control R26 Fully ccw CIRCUIT BREAKERS CB2 through IN CB11 BATTERY CIRCUIT SELECTOR switch S6 OFF (fully cw) REGULATOR CHECK FIXED RESISTANCE METHOD S13 OFF switch DC VARIABLE VOLTS switch S10 OFF 2-8 Change 1 Change 1 2-8.1/(2-8.2 blank)