Lincoln Electric INVERTEC IM526-B Operator's Manual page 17

Step Test
4 Switch PC Board
resistance test.
No dynamic test
is possible.
Remove leads
401/403, 1/8, 9,
12, 4/5 and
402/404.
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, con-
tact your local Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
Check
Terminals on Switch >1K ohms
PC Board:
1/8 (pos) to
12 (neg) <100 ohms
1/8 (neg) to <100 ohms
12 (pos)
>1K ohms
9 (pos) to >1K ohms
4/5 (neg)
<100 ohms
9 (neg) to <100 ohms
4/5 (pos)
>1K ohms
1/8 (pos) to <100 ohms
9 (neg)
>1K ohms
1/8 (neg) to >1K ohms
9 (pos)
<100 ohms
12 (pos) to <100 ohms
4/5 (neg)
>1K ohms
12 (neg) to >1K ohms
4/5 (pos)
<100 ohms
12 (pos) to >1K ohms
401/403 (neg)
<100 ohms
12 (neg) to <100 ohms
401/403 (pos)
>1K ohms
9 (pos) to <100 ohms
402/404 (neg)
>1K ohms
9 (neg) to >1K ohms
402/404 (pos)
<100 ohms
CAUTION
Test
Conclusion
Result
OK
Short
OK
Open
OK
Short
OK
Open
OK
Open
OK
Short
OK
Open
OK
Short
OK
Short
OK
Open
OK
Open
OK
Short
– –
17
Next
Test
Step Repair Action
cont
5 Replace Switch PC Board
cont
5 Replace Switch PC Board
cont
5 Replace Switch PC Board
cont
5 Replace Switch PC Board
cont
5 Replace Switch PC Board
cont
5 Replace Switch PC Board
cont
5 Replace Switch PC Board
cont
5 Replace Switch PC Board
cont
5 Replace Switch PC Board
cont
5 Replace Switch PC Board
cont
5 Replace Switch PC Board
cont
5 Replace Switch PC Board