Lincoln Electric SP-250 service manual #206 4J6 #208 16J6 #209 7J6 G1992 Code 9402 only

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F-17 TROUBLESHOOTING & REPAIR F-17

MAIN TRANSFORMER TEST

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G1992 (Code 9402 only):
FROM	TO	EXPECTED
LEAD	LEAD	VOLTAGE
#202	#203	30 VAC
(6J3)	(7J3)
#202	#204 A	15 VAC
(6J3)	(5J3)
#203	#204 A	15 VAC
(7J3)	(5J3)

8.Turn OFF the machine

9.Locate the following leads on Plug J6 on the G2252 Control PC Board or Plug J3 on the G1992 Control PC Board. See Figures F.1A & F1.B.

G2252:

LEAD	PLUG
	LOCATION
#206	4J6
#208	16J6
#209	7J6

G1992 (Code 9402 only):

LEAD	PLUG
	LOCATION
#206	3J3
#208	1J3
#209	2J3

10.

Turn ON the machine.

11.Make the following voltage tests at Plug J6 on the G2252 Control PC Board, or at Plug J3 on the G1992 Control PC Board (Code 9402 only.)

a.Turn the machine OFF between each test.

b.Carefully insert the meter probes into the back of each Molex Plug pin cavity to perform the test.

G2252:
FROM	TO	EXPECTED
LEAD	LEAD	VOLTAGE
#208	#209	60 VAC
(16J6)	(7J6)
#208	#206	30 VAC
(16J6)	(4J6)
#209	#206	30 VAC
(7J6)	(4J6)
G1992 (Code 9402 only):
FROM	TO	EXPECTED
LEAD	LEAD	VOLTAGE
#208	#209	60 VAC
(1J3)	(2J3)
#208	#206	30 VAC
(1J3)	(3J3)
#209	#206	30 VAC
(2J3)	(3J3)

c.If any of the voltages tested are incorrect, check for loose or bro- ken leads between the test points and the main transformer.

d.If ALL the voltages tested are incorrect or missing, go to Step 12.

12.Test for correct nameplate input volt- age between the H1 lead at the ON/OFF POWER SWITCH to H2 or H3 at the reconnect panel. Voltage tested will vary depending on Input Voltage Connection. See wiring dia- gram for test point locations.

a.If the voltage test is incorrect,

-check for loose or broken leads between the reconnect panel and the ON/OFF POWER SWITCH.

-test the ON/OFF POWER SWITCH for proper operation.

IDEALARC SP-250