Troubleshooting & repair, Test procedure, Boost power board test (continued) – Lincoln Electric LN-15 WIRE FEEDER SVM166-A User Manual
Page 50
LN-15
F-12
F-12
TROUBLESHOOTING & REPAIR
TEST PROCEDURE
1. Remove input power to the LN-15.
2. Perform the Cover and Spindle Mount removal
3. Locate the Boost Power Board. See Figure F.1.
4. Apply the correct DC voltage to the LN-15 (15-110
VDC).
5. Check for the correct input voltage to the Boost
Power Board at leads 526A (+) to 527A(-) (15-110
VDC). See Figure F.3. If the input voltage is not
present check the input rectifier bridge and associ-
iated circuits. See the wiring diagram.
6. Check for approximately 80 VDC at leads 501(+) to
7. Check for approximately 80 VDC at leads labeled
8. If the correct input voltage is present in step 5 and
either of the voltages in steps 6 or 7 are not present
the Boost Power Board is faulty. Replace.
BOOST POWER BOARD
FIGURE F.1 – BOOST POWER BOARD LOCATION
BOOST POWER BOARD TEST (continued)