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Test Meter PC Board Accuracy. (Metric Models Only)
1. Use a test meter with at least 3-1/2 digits and +/-
.5% accuracy.
2. Connect the + probe to lead called for in the table
below and the - probe to lead #510C.
NOTE: The coating will have to be removed from the
test points.
3. With the meter in SET M/MIN, adjust the speed con-
trol until the LN-9 meter matches the settings in the
table below. If the test meter does not match the
readings, the meter PC board may be faulty.
Replace the meter PC board.
TROUBLESHOOTING & REPAIR
F-41 F-41
LN-9 Wire Feeder
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METER CIRCUIT ACCURACY TEST (continued)
METRIC MODEL METRIC RANGE SET M/MIN READING TEST VOLTMETER
READING
LN-9 or LN-9F LO 8.89 LEAD #560
3.50 +/-.05VDC
HI 15.2 LEAD #561
6.00 +/-.07VDC
LN-9H or LN-9FH LO 8.28 LEAD #560
2.00 +/- .05VDC
HI 24.8 LEAD #561
6.00+/-.07VDC