Lincoln Electric SVM161-A service manual Main Inverter Board Power Factor Section Test

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F-32 TROUBLESHOOTING AND REPAIR F-32

MAIN INVERTER BOARD POWER FACTOR SECTION TEST (continued)

FIGURE F.14 – LOCATION ON MAIN BOARD

MAIN BOARD

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PROCEDURE

1.Remove input power to the V205-T machine.

2.Using a phillips head screwdriver, remove the case wraparound cover.

3.Perform the Capacitor Discharge Procedure detailed earlier in this section.

4.Locate the power factor section on the main board and associated plugs. Do not remove plugs from the board. See Figure F.15.

5.Carefully apply the correct input voltage to the V205-T and check for the correct secondary voltages per tables F.10 & F11. Voltage read- ings were taken with a Fluke RMS meter. See Figure F.15 for joint locations.

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TABLE F.10 – VOLTAGE CHECKS WITH 115 VAC APPLIED TO MACHINE

Generator/Mode	Component	Ref. Point	Value
ON/STICK	DD1	A[-],K[+]	250-260 VDC
ON/STICK	MF8	S[-],D[+]	125 VDC
ON/STICK	MF8	S[-],G[+]	2.2 VDC
ON/STICK	MF9	S[-],D[+]	120 VDC
ON/STICK	MF9	S[-],G[+]	2.2 VDC
ON/STICK	-------	L10 (LED)	ON
ON/STICK	TP20-TP9	-------	385 VDC +/-5V
	TABLE F.11 – RESISTANCE CHECKS
Generator/Mode	Component	Ref. Point	Value
OFF	F1	-------	<1 OHM
OFF	R82	-------	46 OHM

INVERTEC® V205-T AC/DC™