Wayne Dresser Vista 1 Series, Service Manual

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58
Part No. 920160 Rev A February 1997
7.1.4. Computer Assembly Replacement,
continued
12. Replace the DEM in its original position and turn the control power ON.
13. Program the dispenser as follows:
a. Set the macro and all option programming.
b. Set the unit prices (if stand-alone); or
c. Set the fueling point number.
14. Reinstall the bezel.
15. Record totals a second time and give both sets of totals to the dealer/
manager for his or her records.
7.1.5. Intrinsic Safe Barrier Assembly Replacement
The Intrinsic Safe Barrier circuit board is mounted to the bottom of the plastic
cover (see Figure 7-3. and Figure 7-4.). The circuit board is not separately
replaceable; the complete ISB assembly (the black plastic box) must be
replaced.
1. Remove both bezels and place DEMs in Service position.
2. From the dispenser junction box side, unplug the connectors from the top of
the ISB assembly.
3. Disconnect the ground wire from chassis.
4. Remove the (1) front and (1) rear mounting screws from the assembly.
5. Tilt the ISB assembly up and unplug the connectors from the bottom.
6. Replace with new ISB assembly using reverse procedure and ensure that the
ground wire is re-connected.