Ross Synergy 1, Руководство по обслуживанию

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Synergy 1 and Synergy 100 Maintenance Guide (v16-S1) Synergy 1 Panel Maintenance • 11–5
Replacing a Button
Use the following procedure to replace the failed button:
1. Turn control panel power off.
2. Remove the keycap to reveal the sleeve and bulb within. Refer to the diagram below.
Location of Sleeve and Bulb
3. Remove the bulb as follows:
• Carefully push down the sleeve with your fingers.
• While holding down the sleeve, use needle-nose pliers to carefully grab the plastic
body of the bulb and pull it out.
• Note that the bulb has a two-wire connection in which polarity is not important.
4. In order to gain access to the Synergy 1 panel boards and locate the button that has
failed, you must be able to lift the cover of the control panel off the base.
• Gently flip the control panel onto its side on a clean, flat, static free surface.
• Locate the eleven screws on the underside of the tub.
• Loosen and remove the eleven screws, and set them aside in a safe place.
• Gently place the panel back down on its base.
5. For this next step, ensure you have telephone books, or a similar thick, sturdy object
available with which to support the control panel cover.
• Raise the cover and slide the telephone books under the rear area of the side panels
to keep it raised and secure while you work.
• Ensure you have enough workspace to access the failed button.
• Position a work light in the control panel tub, if necessary.
6. There are two types of buttons used in the panel — a large tall button used for the
crosspoint buses, and a smaller, short button used for all other functions.
The figure below shows the underside of each button and the arrangement of solder
pads. Each type of button has six solder pads.
Button Types — Solder Pads
Operating
Tip
If you have trouble removing a control panel button, use a pair of
wide-tipped pliers (1/2 inch) with masking tape wrapped around the
ends. For best results, wiggle the button back and forth as you extract
it. This helps to remove the button easily and also avoids scratching the
surface paint.
Keycap
Sleeve
Bulb
Large
Button
Keyhole
Small
Button