Lincoln Electric SVM188-A service manual Figure F.9 Transformer Secondaries

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F-23 TROUBLESHOOTING AND REPAIR F-23

MAIN TRANSFORMER VOLTAGE TEST (continued)

FIGURE F.9 – TRANSFORMER SECONDARIES

A

A

A

SECONDARY LEADS	COMMON BUSS
(6 PLACES)
PROCEDURE
9. Test with an AC voltmeter for approximately 55 VAC		NOTE: All of the secondary voltages will vary if the
from each of the six main transformer secondary		input line voltages vary. If any one or more of the volt-
leads to the common bus connected to the output		age checks are incorrect, check for loose or faulty con-
choke. See Figure F.9.		nections. See the Wiring Diagram. If the leads and
		connections are OK, the main transformer may be

faulty.

FIGURE F.10 – AUXILIARY VOLTAGES

	5	6
	4
		7
	3
RECEPTACLE		8
	2
		9
	1	10
TS 2		DC-600

21+ 21- 41 4 2 31 32

PROCEDURE

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10.Test for 120 VAC between leads #31 and #32 on terminal strip TS-2. See Figure F.10. 120 VAC should also be present at the receptacle. If the cor- rect voltage is not present, make sure the 20 amp circuit breaker is not tripped or faulty. Also check the wiring between the main transformer, the termi- nal strip, the circuit breaker and the receptacle. See the Wiring Diagram.

12.Test for 42 VAC between leads #41 and #2 on the terminal strip. See Figure F.10. If the correct volt- age is not present, make sure the 10 amp circuit breaker is not tripped or faulty. Also check the wiring between the main transformer, the terminal strip, and the circuit breaker. See the Wiring Diagram.

DC-600