Lincoln Electric SVM166-A service manual Blue Red 562

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F-22 TROUBLESHOOTING AND REPAIR F-22

HALL EFFECT MODULE TEST (Continued)

Figure F.7 - PLUG J2 LEAD LOCATION

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Blue Red (562) (563)

TEST PROCEDURE

1.Remove the input power to the LN-15.

2.Perform the Wire Drive Assembly

Removal procedure.

Black (561)

This value can also be measured using a frequency counter

50 in./min. = 120 HZ

700 in./min. = 1.6 KHZ

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3.Locate the three Hall Effect leads at Plug J2. See Figure F7.

4.Apply at least 15VDC but no more than 115VDC to the LN-15 from the electrode cable to the work sensing lead.

5.Check for the presence of 5VDC from lead 563 (Red+) to lead 561 (Black-). If the 5VDC is not present or low, the feed head control board may be faulty.

6.Activate the LN-15 trigger circuit, make sure the drive motor is running and check for the presence of approximately 2.8VDC from lead 562 (Red+) to lead 561 (Black-). The value of 2.8VDC represents the correct feedback voltage from the Hall Effect device to the control board.

7.If the above voltage reading is not correct, the Hall Effect device may be faulty.

LN-15