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WARNING
ELECTRIC SHOCK can kill.
With input power ON, there are high voltages inside the machine. Do not reach into the machine or
touch any internal part.
10.Turn input power ON.
11.With the volt/ohmmeter, check the follow- ing voltages between plug J16 pins at the display board (without removing plug J16 from the display board):
+5 VDC | Between J16 - pin 2 and J16 - |
| pin 3 |
+15 VDC | Between J16 - pin 10 and J16 |
| - pin 7 |
+5 VDC | Between J16 - pin 1 and J16 - |
| pin 7 |
Between J16 - pin 9 and J16 - | |
| pin 7 |
Between J16 - pin 6 and J16 - | |
| pin 7 |
13.Perform the following tests to locate the problem: Auxiliary Transformer 1 Test and Internal and Auxiliary Voltage Supply Test. If these tests show no com- ponent failures, go to step 14.
14.Make sure plug J19 is plugged into the display board securely and that none of its pins are loose or broken. If the pins are all okay, replace the LCD display.
15.If the problem persists after replacing the LCD display, replace the display board.
16.After the problem has be repaired, install the machine case sides and top. Install the handle and the lift bail rubber gasket.
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12.Turn power switch SW1 to the OFF posi- tion and disconnect input power to the machine. Connect plug J30 into the pro- tection board. Connect the five leads to the main contactor.
If the voltages checked in step 11 were cor- rect, go to step 14.
If any of the voltages in step 11 were not cor- rect, go to step 13.
