Lincoln Electric SVM153-A service manual Troubleshooting & Repair

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F-33	F-33
	TROUBLESHOOTING & REPAIR

FLASHING AND ROTOR VOLTAGE TEST(CONTINUED)

FIGURE F.12 - FIELD DIODE RECTIFIER BRIDGE AND FILTER CAPACITOR

	FIELD
	DIODE
FILTER	RECTIFIER
CAPACITOR	BRIDGE

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7.If the voltage reading is low or not present, the generator field is not functioning proper- ly. Perform the Rotor Resistance Test. Also check the field diode rectifier bridge, fil- ter capacitor, and associated leads and con- nections. See Figure F.12 for location. See the Wiring Diagram.

NOTE: The normal flashing voltage is approxi- mately 9VDC. This is battery voltage, which is processed through the Battery board. This volt- age must be present during start-up to "flash" the rotor field.

8.If the rotor voltage readings are normal, the field circuit is functioning properly. Replace any cable ties cut during the test. Install the right case side.

COMMANDER 500