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F-17

TROUBLESHOOTING & REPAIR

 

F-17

 

 

 

 

 

 

 

 

INPUT RECTIFIER TEST (continued)

 

 

 

 

 

 

TABLE F.2 Input Rectifier Test Points

 

 

 

 

 

 

 

 

 

 

 

 

 

TEST POINT TERMINALS

ANALOG METER X10 RANGE

 

 

 

 

 

+ Probe

- Probe

Acceptable Meter Readings

 

 

 

 

 

 

 

 

 

 

 

 

 

A

207

Greater than 1000 ohms

 

 

 

 

 

B

207

Greater than 1000 ohms

 

 

 

 

 

C

207

Greater than 1000 ohms

 

 

 

 

 

A

209

Less than 100 ohms

 

 

 

 

 

B

209

Less than 100 ohms

 

 

 

 

 

C

209

Less than 100 ohms

 

 

 

 

 

207

A

Less than 100 ohms

 

 

 

 

 

207

B

Less than 100 ohms

 

 

 

 

 

207

C

Less than 100 ohms

 

 

 

 

 

209

A

Greater than 1000 ohms

 

 

 

 

 

209

B

Greater than 1000 ohms

 

 

 

 

 

209

C

Greater than 1000 ohms

 

 

 

 

 

 

 

 

 

 

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6.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(D9) check the input power switch (S1) and perform the Power Board Resistance Test. Also check for leaky or faulty filter capacitors.

7.When installing a new Input Rectifier, torque the mounting nuts to 44IN-LBS. A thin coating of Dow Corning 340 Heat Sink Compound (Lincoln E1868) is recommended. Torque the lead terminals to 31IN- LBS. See Input Rectifier Bridge Removal And Replacement.

8.If the Input Rectifier is good be sure to reconnect leads #207, #207A and #209 to the correct terminals and torque to 31IN-LBS. See wiring dia- gram and Figure F.2.

INVERTEC V250-S

Page 49
Image 49
Lincoln Electric V250-S service manual Table F.2 Input Rectifier Test Points, Test Point Terminals Analog Meter X10 Range