Lincoln Electric V205-T service manual Figure F.14 Upfr Location on Main Board

Return to Section TOC

Return to Master TOC

F-32 F-32

TROUBLESHOOTING & REPAIR

MAIN INVERTER BOARD “UPFR” SECTION TEST (continued)

FIGURE F.14 UPFR LOCATION ON MAIN BOARD

MAIN BOARD

Return to Section TOC

TOC

Return to Master TOC

TOC

TEST 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 UPFR section on the main board and associated plugs. Do not remove plugs from the board. See Figure F.14.

5.Carefully apply the correct input voltage to the V205-T and check for the correct sec- ondary voltages per tables F.10 & F11. Voltage readings were taken with a Fluke RMS meter. See Figure F.15 for joint loca- tions.

Return to Section

Return to Section TOC

Return to Master

Return to Master TOC

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

Generator/Mode	Component	Ref. Joint	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. Joint	Value
OFF	F1	-------	<1 OHM
OFF	R82	-------	46 OHM

V205-T AC/DC