Lincoln Electric POWER MIG SVM170-A Service Manual page 52

F-12
FIGURE F.1 — G3521 CONTROL PC BOARD AND M19248 SNUBBER PC BOARD
TEST PROCEDURE
The ON/OFF POWER SWITCH will be
"hot" during these tests.
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NOTE: Secondary voltages will vary pro-
portionately with the primary input voltage.
1. Disconnect the main input power sup-
ply to the machine.
2. Remove the case top and side panels
with a 3/8 in. nutdriver.
3. Remove the tool tray with a 5/16 in. nut-
driver.
TROUBLESHOOTING AND REPAIR
MAIN TRANSFORMER TEST (continued)
MAIN TRANSFORMER TEST POINTS.
WARNING
POWER MIG 255C
X5
(6J6)
X6
J6
(5J6)
X7
X9
(4J6)
(8J5)
J5
X8
#206
(16J5)
(3J5)
#208 #208
(2J5) (2J5)
#209
(1J5)
J3
J8
J1
J4
J2
4. Locate plug J6 on the control PC board.
See Figure F.1.
NOTE: The location of plugs may vary
depending on the machine code.
5. Locate the following leads on plug J6
on the control PC board:
LEAD
PLUG
LOCATION
X5 6J6
X6 5J6
X7 4J6
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