I'm using my TB 251, 1999' model, with HF box on a big aluminum job. My TB amps outout is max or near, with no adjustment. The adjustment dial has no effect on the max output. The machine is welding fine on max output but cannot be turned down. The generator 120v works....everything works but I cannot turn down the amp output.......Any advice??
Results 1 to 4 of 4
04-14-2014, 10:17 PM #1
Cannot Adjust the output of my TB 251..Miller TrailBlazer 251NT
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Miller ft peddles and thumb wheels
Miller MM 212
Lincoln power mig180c (two of)
Miller Elite Dig
04-15-2014, 07:53 AM #2Member
- Join Date
- Mar 2014
Check position of Remote Amperage/Voltage switch S3.
Check resistance and connections of A/V control R1; R1 is 0 to 1000 ohmCheck hall device HD1, and replace if necessary.
Check Field Current Control Board PC2 and connections, and replace if necessary (see Section 8-6 or
8-8). LED2 and LED3 on PC2 light when PC2 is energized.
04-15-2014, 08:16 PM #3Senior Member
- Join Date
- Oct 2007
- Cave Creek Az
Can you adjust it if it is in regular stick mode with no 14 pin connected?
04-24-2014, 03:42 PM #4
If you still can't figure it out, I kinda need the machines serial #