Component Replacement; Electronic Component Replacement; Removing The Bezel From Vista Dispensers - Wayne Vista Series Service

This section describes the procedures necessary to replace the major components in Wayne
dispensers.
7.1.

ELECTRONIC COMPONENT REPLACEMENT

Caution: Before replacing any components, power should be removed from the system.
Additionally, totals should be read and recorded in case of memory alteration.
When removing or installing one of the electronic components within the computer
housing, take care not to contact one component with another. Contact between compo-
nents might cause damage to the circuit board coating, circuit board tracks, or circuit
components.
Before replacing any components, servicing personnel must wear a static guard wrist
strap (Dresser part number 916962 or equivalent) securely attached to an earth grounding
point in order to prevent damage to electronic components due to static electricity.
Always keep replacement components in their anti-static shipping bags until they are
installed. Put replaced suspect components in the anti-static bags for return to the factory
in original packaging and fill out a return parts tag.
After having replaced a component, make a thorough visual inspection of your work to
ensure that:
1. All connections are secure.
2. All mounting hardware is secure.
3. There are no loose washers, screws, tools, etc., lying around which might cause a
failure.
7.1.1.

Removing the Bezel From Vista Dispensers

In order to access any of the electronic components the bezel must be re-
moved; to remove the bezel perform the following steps:
1. Lower the ad panel holder frame by pulling the holder frame out and down
2. Lowering the ad panel down toward you, exposes the function switch
3. Unscrew the thumbscrews, or unlock the bezel locks.
November 1992

7. COMPONENT REPLACEMENT

from the top (see Figure 2-1).
access door and the thumbscrews or bezel locks which secure the bezel to
the dispenser.
Part No. 917543 Rev. A
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