Lincoln Electric SVM 117-A service manual Main Transformer Test

Return to Section TOC

Return to Section TOC

Return to Section TOC

Return to Section TOC

Return to Master TOC

Return to Master TOC

Return to Master TOC

Return to Master TOC

F-12

TROUBLESHOOTING & REPAIR

F-12

MAIN TRANSFORMER TEST (CONTINUED)

4. Locate the following leads on Plug

a.

Turn the machine OFF between

J3:

each test.

G2332:

b.

Carefully

insert the

meter

LEAD

PLUG

probes

into

the

back

of each

LOCATION

Molex Plug pin cavity to perform

#202

1J3

the test.

G2332:

#203

3J3

#204 A

2J3

FROM

TO

EXPECTED

LEAD

LEAD

VOLTAGE

5. Connect main input power to the

machine.

#208

#209

60 VAC

6. Turn the Wire-Matic 250 ON/OFF

(16J6)

(7J6)

POWER SWITCH to ON.

#208

#206

30 VAC

7. Make the following voltage tests at

(16J6)

(4J6)

Plug J3.

#209

#206

30 VAC

a. Turn the machine OFF between

(7J6)

(4J6)

each test.

c. If any of the voltages tested are

b. Carefully insert the meter

incorrect, check for loose or bro-

probes

into the back of each

ken leads between the test

Molex Plug pin cavity to perform

points and the main transformer.

the test.

G2332:

d.

If ALL the voltages tested are

incorrect or missing, go to Step

FROM

TO

EXPECTED

12.

LEAD

LEAD

VOLTAGE

12. Test for correct nameplate input volt-

#202

#203

30 VAC

age between the H1 lead at the

(1J3)

(3J3)

ON/OFF POWER SWITCH to H2 or

#202

#204 A

15 VAC

H3 (H5 if connected for 575 VAC) at

the reconnect panel. Voltage tested

(1J3)

(2J3)

will vary depending on Input Voltage

#203

#204 A

15 VAC

Connection. See wiring diagram for

test point locations.

(3J3)

(2J3)

a.

If the voltage test is incorrect,

8. Turn OFF the machine

9. Locate the following leads on Plug

-

check for loose

or

broken

J6 on the G2332 Control PC Board.

leads between

the

reconnect

G2332:

panel and the ON/OFF POWER

SWITCH.

LEAD

PLUG

LOCATION

- test the ON/OFF POWER

#206

4J6

SWITCH for proper operation.

#208

16J6

b. If the correct nameplate voltage

#209

7J6

is being applied to the main

10. Turn ON the machine.

transformer and one or more of

11. Make the following voltage tests at

the

secondary

voltages

are

missing

or

are

incorrect,

the

Plug J6 on the G2332 Control PC	main transformer may be faulty.
Board.
	Replace.
WIRE-MATIC 250