Lincoln Electric SVM194-A service manual BATTERY, STARTER, Engine Alternator & Protection Circuits

TOC TOC

E-4	THEORY OF OPERATION	E-4
	FIGURE E.4 - BATTERY, STARTER, ENGINE, ALTERNATOR & PROTECTION CIRCUITS
	(Classic® 300G, Zenith Fuel System/GM Engine)

Return to Section Return to Master

Return to Section TOC Return to Master TOC

	IDLE
	SWITCH
	ENGINE
	RPM CONTROL	FUEL PUMP
ZENITH	HOUR METER
E.C.U.	ENGINE FAILURE LAMP
	IGNITION
	SWITCH	ENGINE
		ALTERNATOR
	AMMETER	START

BATTERY

ENGINE

CONTROL

COMPONENTS

AND

SENSORS

GASOLINE

ENGINE

STARTER

MOTOR

			SELECTOR
				SWITCH					NEGATIVE
								CURRENT	OUTPUT
									TERMINAL
								SENSOR
								P.C. BOARD
					115 & 230VAC
					RECEPTACLES
		GENERATOR
	SERIES	FRAME
	COILS
	GENERATORBRUSHES			COMMUTATOR		ALTERNATOR STATOR
MECHANICALCOUPLING					SHAFT	ROTATOR	RINGSSLIP
	ARMATURE				ARMATURE
			&			-
	INTERPOLE	RESIDUAL			FLASHING			+
	COILS	MAGNETISM
	FIELD
	SHUNT
	WINDINGS					FIELD
						RECTIFIER
				GENERATOR
				FIELD CONTROL					POSITIVE
				RHEOSTAT
									OUTPUT
									TERMINAL

Return to Section TOC Return to Master TOC

Return to Section TOC Return to Master TOC

BATTERY, STARTER, ENGINE,

ALTERNATOR & PROTECTION

CIRCUITS

The 12VDC battery powers the starter motor and, through the ignition switch, the engine protection cir- cuitry. In the event of a low oil pressure or a high coolant temperature condition, the engine protection system shuts the engine off.

The idle / engine protection PC board or, the engine control unit (ECU) monitors the oil pressure sensor, and the coolant temperature sensor. If either sensor “ faults,” the engine is shut down.

The engine alternator supplies “charging” current for the battery circuit. If the alternator would cease to func- tion correctly, due to a broken fan belt or other mal- function, the engine protection system would shut the engine down.

NOTE: Unshaded areas of Block Logic

Diagram are the subject of discussion

CLASSIC® 300D & 300G