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TROUBLESHOOTING & REPAIR
QUICK VOLTAGE CALIBRATION (continued)
FIGURE F.54 - TEST AND CALIBRATION OVERLAY
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PROCEDURE
1.Before changing or disturbing the display board, power up the machine with the
2.Press the Voltage Calibration function (32). The machine should display the following:
VOLTAGE WIRE
+POLARITY (+67A)
3.Press the Enter Key (133) on the lower right side of the overlay. The machine should display the following:
ADJUST TO 30V
CALIBRATION #=XX
NOTE: Here “XX” indicates a particular cali- bration number for a given voltage sensing point.
WARNING
The machine’s output terminals will be electri- cally “HOT” when the Enter Key is pressed.
4.Record the number displayed for the +67 wire and press the Enter Key (133) again.
5.Repeat the process by pressing the Voltage Calibration function again. The next sens- ing lead may be selected by pressing the down Arrow Key (101). The above proce- dure must be repeated six times to obtain and record the calibration number for six different voltage sensing points. These points are the following:
+Polarity (+67A)
+Polarity (+67B)
-Polarity (+21A)
-Polarity (+21B)
+Polarity
-Polarity
6.Install the “new” replacement display board.
7.With the
ADJUST TO 30V
CALIBRATION #=XX
The calibration number is changed using the up/down Arrow Keys (100, 101). Press the Enter Key when the desired number is dis- played.
8.Repeat the process for all six sensing points (leads).
9.Perform the Sensor Calibration Test.
