Lincoln Electric 355M Manuel d'utilisateur télécharger pdf (Page 67)

207

207A

209

TROUBLESHOOTING AND REPAIR

F-21 F-21

POWER WAVE 355M/405M

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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 recon-

nect switches. Perform the Main Switch

Board 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.

11. If the input rectifier is faulty, see the

Input Rectifier Bridge Removal &

Replacement procedure.

12. Replace the case wraparound cover.

INPUT RECTIFIER TEST (CONTINUED)

Table F.2 Input Rectifier Test Points

TEST POINT TERMINALS

ANALOG METER

X10 RANGE

207

207A

209

Greater than 1000 ohms

Less than 100 ohms

Greater than 1000 ohms

+ PROBE

- PROBE

Acceptable Meter Readings

1 2 ... 62 63 64 65 66 67 68 69 70 71 72 ... 136 137

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Lincoln Electric 355M Manuel d'utilisateur Page 67