Lincoln Electric SVM158-A service manual Perform the Input Capacitor Discharge Procedure, Ld T

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F-38 F-38

TROUBLESHOOTING AND REPAIR

CURRENT TRANSDUCER TEST (continued)

FIGURE F.10 Metal Plate Removal & Plug J8 Location

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A

AMPS

V

VOLTS

STICK 7018

A

LD T

OUTPUT

CC-

CC-STICK

WE

ERM

TIG G

TAW

6010

IN

ALS

CV-W

IRE

CV-

HOT

SE

FLUX

CORED

START

LECT

4

5

WA

SELECT

3

ARC

2

6

RNING

1

7

-2CONTROL

0

8

-4

0

REMOTE

10

9

-6

+2

+4

-8

-10

+6

SOFT

+10

+8

CRISP

POWER

ON

OFF

Plug J8

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TEST PROCEDURE

1.Remove input power to the V350-PRO.

2.Using the 5/16” nut driver, remove the case wraparound cover.

3.Perform the Input Capacitor Discharge

Procedure.

4.Locate plug J8 on the control board. Do not remove the plug from the P.C. Board.

5.Apply the correct input power to the V350- PRO.

6.Check for the correct DC supply voltages to the current transducer at plug J8. See Figure F.11.

A.Pin 2 (lead 802+) to pin 6 (lead 806-) should read +15 VDC.

B.Pin 4 (lead 804+) to pin 6 (lead 806-) should read -15 VDC.

7.If either of the supply voltages are low or miss- ing, the control board may be faulty.

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FIGURE F.11. Plug J8 Viewed From Lead Side of Plug

802804

801

Plug J8

806

V350-PRO