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F-21

TROUBLESHOOTING & REPAIR

 

F-21

 

 

 

 

 

 

 

 

POWER BOARD RESISTANCE TEST (continued)

 

 

 

 

 

 

TABLE F.3 Power Board Resistance Test Points.

 

 

 

 

 

 

 

 

 

 

 

 

 

TEST POINT TERMINALS

ANALOG METER X10 RANGE

 

 

 

 

 

+ Probe

 

- Probe

Acceptable Meter Readings

 

 

 

 

 

 

 

 

 

 

 

 

 

 

201

 

207A

Greater than 1000 ohms

 

 

 

 

 

207A

 

201

Less than 100 ohms

 

 

 

 

 

204

 

207A

Greater than 1000 ohms

 

 

 

 

 

207A

 

204

Less than 100 ohms

 

 

 

 

 

202A

 

204

Greater than 1000 ohms

 

 

 

 

 

204

 

202A

Less than 100 ohms

 

 

 

 

 

202A

 

201

Greater than 1000 ohms

 

 

 

 

 

201

 

202A

Less than 100 ohms

 

 

 

 

 

205

 

203A

Greater than 1000 ohms

 

 

 

 

 

203A

 

205

Less than 100 ohms

 

 

 

 

 

208

 

203A

Greater than 1000 ohms

 

 

 

 

 

203A

 

208

Less than 100 ohms

 

 

 

 

 

206

 

208

Greater than 1000 ohms

 

 

 

 

 

208

 

206

Less than 100 ohms

 

 

 

 

 

206

 

205

Greater than 1000 ohms

 

 

 

 

 

205

 

206

Less than 100 ohms

 

 

 

 

 

 

 

 

 

 

 

6.If the power board does not meet the acceptable readings outlined in Table F.3. the board may be faulty. Replace. See Power Board

Removal and Replacement Procedure.

Note: Complete power board and filter capacitor replacement is recommended

.

7.If the power board “passes” the resistance test proceed to the Power Board Voltage Test.

Note: Reconnect leads #201, #204, #205 and #208 to their appropriate ter- minals.

INVERTEC V250-S

Page 53
Image 53
Lincoln Electric V250-S service manual Table F.3 Power Board Resistance Test Points