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F-181

F-181

TROUBLESHOOTING & REPAIR

DISPLAY BOARD REMOVAL AND REPLACEMENT (continued)

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8.Carefully remove the key pad ribbon con- nector from the right side of the display board.

9.Carefully remove the connector to the LCD display.

CAUTION

Do not touch the sensors located on the left side of the display board when you handle it for removal or replacement. Failure to do so can result in permanent damage to the sen- sors.

10.Carefully remove the display board from the its mounting pins. Remove the display board by lifting up and out.

11.Reinstall the display board by carefully pressing it onto its mounting pins. Install the LCD display connector, the key pad connector, and the eight molex plugs that fit along the bottom portion of the display board.

12.After you have installed the display board (a new one or the old one), you must per- form the Display Board Sensor Calibration Test and necessary voltage calibration. Refer to this test in the test portion of this section of the manual.

13.After performing the Display Board Sensor Calibration Test, install the machine case sides and top.

14.Install the handle and the lift bail rubber gasket.

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POWER WAVE 450

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Lincoln Electric SVM112-B service manual 181