Probe

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F-31

TROUBLESHOOTING & REPAIR

OUTPUT DIODE MODULES TEST (continued)

Figure F.6 Terminal Probes

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-	PROBE

+ PROBE

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5.If 200 ohms is measured then the output diodes are not “shorted”.

NOTE: There is a 250 ohm resistor across the welding output terminals.

6.If less than 200 ohms is measured, one or more diodes or the snubber board may be faulty.

7.Perform the Filter Capacitor Discharge Procedure detailed earlier in this section.

8.Locate the output diode modules and snub- ber board. See Figure F.7.

9.Test all output diode modules individually.

NOTE: This may require the disassembly of the leads and the snubber board from the diode modules. Refer to the Output Diode

Modules Removal and Replacement Procedure for detailed instructions.