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TROUBLESHOOTING & REPAIR
F-28 F-28
POWER MIG 300
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ENCODER PC BOARD TEST (continued)
FROM LEAD TO LEAD EXPECTED VOLTAGE
855 3243 15 VDC
5J85 3J82
8511 3243 0 OR 15 VDC
11J85 3J82
858 3243 0 OR 15 VDC
8J85 3J82
VOLT/TRIM ENCODER #1
ACTION
If you do not read 15VDC on the first reading of encoder
#1 or #2 then check lead connections. If lead connec-
tions check OK, then Feeder Board may be faulty,
replace Feeder Board.
As you turn the encoder #1 or #2 slowly you should see
your meter go from 0 to 15, 0 to 15 as you turn the
encoder. If not, check the lead connections. If the lead
connection check OK then, change the encoder.
FROM LEAD TO LEAD EXPECTED VOLTAGE
859 3243 15 VDC
9J85 3J82
857 3243 0 OR 15 VDC
7J85 3J82
WMF/AMPS ENCODER #2
ACTION
If you do not read 15VDC on the first reading of encoder
#1 or #2 then check lead connections. If lead connec-
tions check OK, then Feeder Board may be faulty,
replace Feeder Board.
As you turn the encoder #1 or #2 slowly you should see
your meter go from 0 to 15, 0 to 15 as you turn the
encoder. If not, check the lead connections. If the lead
connection check OK then, change the encoder.