Lincoln Electric INVERTEC V275-S Service Manual page 53

F-23
TEST POINT TERMINALS
+ PROBE
A
B
C
A
B
C
A
B
C
Front Terminal 207A
Front Terminal 207A
Front Terminal 207A
Center Terminal 207
Center Terminal 207
Center Terminal 207
Rear Terminal 209
Rear Terminal 209
Rear Terminal 209
9. If the input rectifier does not meet the
acceptable readings outlined in Table F.2
the component may be faulty. Replace
Note: Before replacing the input rectifier,
check the input power switch and per-
form the Main Switch Board IGBT
Resistance Test. Also check for leaky or
faulty filter capacitors.
10. If the input rectifier is good, be sure to
reconnect leads 207, 207A, and 209 to
the correct terminals and torque to 31
inch lbs. Apply silicone sealant.
TROUBLESHOOTING & REPAIR
INPUT RECTIFIER TEST (CONTINUED)
Table F.2 - Input Rectifier Test Points
- PROBE
Front Terminal 207A
Front Terminal 207A
Front Terminal 207A
Center Terminal 207
Center Terminal 207
Center Terminal 207
Rear Terminal 209
Rear Terminal 209
Rear Terminal 209
V275-S
ANALOG METER
Acceptable Meter Readings
Greater than 1000 ohms
Greater than 1000 ohms
Greater than 1000 ohms
Greater than 1000 ohms
Greater than 1000 ohms
Greater than 1000 ohms
A
B
C
A
B
C
A Greater than 1000 ohms
B Greater than 1000 ohms
C Greater than 1000 ohms
11. If the input rectifier is faulty, see the
Input Rectifier Bridge Removal &
Replacement procedure.
12. Replace the case wraparound cover.
X10 RANGE
Less than 100 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
Less than 100 ohms
Less than 100 ohms
F-23