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| TROUBLESHOOTING & REPAIR |
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| CONTROL INPUT TEST (continued) |
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| FIGURE F.31 – Plug J3 |
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| Pin 5 | Pin 7 | Pin 8 | ||||||||||
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Plug J3
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24.Using a remote control hooked up to the machine amphenol, set the Local/Remote switch in the “Remote” position, and the remote control dial to the minimum position. Repeat steps
25.Disconnect the remote control.
26.Using an ohmmeter, measure the resistance from J3 pin 5 to J3 pin 14. See Figure F.31. The resistance should decrease from 50K to 0 ohms uniformly as the arc force dial is turned clockwise from minimum to maximum.
27.If the resistance check in step 26 fails, check for continuity and poor connections on leads 277, 278, and 278A from the potentiometer back to the control board. See the Wiring Diagram. Look closely for broken molex pins.
Pin 14 Pin 16
28.If all leads check ok, the Arc Force poten- tiometer is bad. Replace.
29.Plug J3 back into the control PC board.
30.If all continuity checks in this section are ok but the voltage checks from the previous sec- tion are off, replace the control board.
31.Using the Case Cover Removal and Replacement Procedure, install the control panel and side panels on the machine.
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