Lincoln Electric INVERTEC V300-PRO SVM105-B Service Manual page 64

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TEST PROCEDURE
1. Perform Input Filter
Procedure as detailed in this section.
2. Locate Input Rectifier (Component D-13).
3. Locate leads needed to perform tests shown in
Figure F.11.
4. Use ohmmeter to perform tests shown in Table F.5.
Replace the Inpit Rectiferif readings are not as indi-
cated
NOTE: When installing a new Input Rectifier, torque
mounting nuts (in a cross tightening pattern) to 6
inch-pounds (.7 Nm). Torque terminals to 26 inch-
pounds (3 Nm). ALWAYS GO TO STEP 6 TO
CHECK RELATED COMPONENTS.
Steps
A
B
C
D
E
F
G
H
I
J
K
L
TROUBLESHOOTING & REPAIR
INPUT RECTIFIER TEST
FIGURE F.11 - INPUT RECTIFIER LOCATION
Capacitor Discharge
TABLE F.5
Test Points
+ Probe – Probe
9 H1
9 A
9 H5
H1 9
A 9
H5 9
12 H1
12 A
12 H5
H1 12
A 12
H5 12
V300-PRO
6. Inspect Main Power Switch S1 and replace if faulty.
Go to step 7.
7. Test Capacitors C1 and C2 and replace both
Capacitors if either is faulty.
NOTE: Faulty Capacitors could be the reason for a
defective Input Rectifier.
Visually inspect Capacitors for leakage, damage, etc.,
and use appropriate test equipment to determine com-
ponent integrity (also check/test Switch Boards for
damage).
Acceptable Meter Reading
Greater than 1K ohms
Greater than 1K ohms
Greater than 1K ohms
Less than 100 ohms
Less than 100 ohms
Less than 100 ohms
Less than 100 ohms
Less than 100 ohms
Less than 100 ohms
Greater than 1K ohms
Greater than 1K ohms
Greater than 1K ohms
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