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56
Part No. 920160 Rev A
February 1997
7.1.4.
Computer Assembly Replacement
Note: The computer assembly and displays contain circuitry which is sensitive to static
discharge. Keep the replacement computer assembly in the anti-static shipping bag
until ready for use. Always place the suspect computer base in the anti-static shipping
bag after replacement and return to the original packaging.
When installing a Duplex II computer in a non-blending dispenser JP2 and JP3 must
have jumpers installed on the two pins closest to the center of the computer board.
1. Record the totalizer readings if the totalizer is functional.
2. Turn OFF the control power.
3. Put the appropriate switch in the data distribution box to bypass.
4. The computer is located behind and below the consolidated display on the
junction box side of the dispenser. To access the computer (see Figure 7-1.),
or solenoid drive board, disengage the two quarter turn screws located
above the left and right corners of the display. The Dispenser Electronic
Module (DEM) will then tilt out toward you to provide access to the internal
electronic components of the dispenser.
5. Disconnect all cables before removing the computer assembly. (The
connectors have two latches which must be squeezed to disengage them
from the board.)
6. Remove the screws securing the computer base assembly to the housing.
7. Lift the computer assembly out of the chassis.
8. Remove the solenoid drive board and install on the new computer assembly.
9. Install the new computer assembly and secure with the hardware removed
in Step 6.
10. Connect all cables to the computer assembly.
11. Set the switches in the data distribution box back to auto.
Содержание Dresser Vista 1 Series
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Страница 77: ...67 February 1997 Part No 920160 Rev A FIGURE 7 9 NOZZLE BOOT ASSEMBLY PUSH TO START ...
Страница 83: ...73 February 1997 Part No 920160 Rev A APPENDIX A TROUBLESHOOTING FLOWCHARTS ...
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Страница 111: ...101 February 1997 Part No 920160 Rev A APPENDIX B SERVICE INFORMATION AND CONNECTOR PIN OUTS ...
Страница 128: ...118 Part No 920160 Rev A February 1997 FIGURE B 20 ISB ASSEMBLY CONNECTION PINOUTS FOR MGD Refer to Table B 1 ...
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