Lincoln Electric 11519 Service Manual page 74

F-28
AND TACHOMETER FEEDBACK TEST (continued)
FIGURE F.9 — PLUG J1 LOCATION ON CONTROL PC BOARD
PROCEDURE
NOTE: POLARITY MUST BE OBSERVED FOR
THESE TESTS.
Test for Correct Wire Drive Motor Armature Voltage
1. Disconnect main input power to the machine.
2. Open the side panels and remove the tool tray
using a 5/16 in. nutdriver.
3. Locate plug J1 on the control PC board. See
Figure F.9.
4. Locate the following leads on plug J1:
LEAD
B
W
5. Connect the main power to the machine.
TROUBLESHOOTING AND REPAIR
WIRE DRIVE MOTOR
W
(2J1)
#206B
(1J1)
PLUG
LOCATION
4J1
2J1
Power MIG® 255XT
J6
J5
B
(4J1)
J8
J1
J4
J3
J2
F-28
#555
(6J1)
#515B
(5J1)