Installation Manual

10-48 Parts Replacement
Replacing the XY Servo Interface PWA
CAUTION! This procedure should only be performed by a trained service technician.
Tools and Materials Needed
• 3-mm Hex Key • 1.0 k-ohm Bleeder Resistor (P/N 50-5190)
• ESD Grounding Strap • Removable Thread Locker (P/N 40-0019)
• Small A-frame Ladder • Torque Wrench
• Small Flat Head Screwdriver
To remove the XY Servo Interface PWA:
? NOTE All components and fasteners removed during this procedure should be retained in an
orderly manner and in a safe location for reinstallation or shipment back to Asymtek.
1. Perform a Service Shutdown as specified in the Safety section of this manual.
WARNING! The Capacitors on the XY Servo Interface PWA present an extreme shock
hazard. Before removing the Servo Shelf Cover, wait at least one minute after
system shutdown to allow the Capacitors to discharge to safe levels.
2. Loosen the two captive, slotted thumbscrews holding the Servo Shelf Cover in place.
Carefully remove the Servo Shelf Cover by pulling it outward and upward. See Figure 10-22.
CAUTION! When removing the Servo Shelf Cover, avoid contacting the electrical and
pneumatic components on the Servo Shelf or they may be damaged.
3. Position the ladder at the back of the dispensing system to facilitate access to the Servo Shelf.
4. Locate the XY Servo Interface PWA and verify that the Power Indicator LEDs are no longer
illuminated. See Figure 10-23.
> Lighted LEDs indicate that electrical power is still present in the system. Wait until all
LEDs go out before proceeding.
5. After verifying all of the cables on the XY Servo Interface PWA are clearly labeled,
disconnect all of the cables attached to the XY Servo Interface PWA.
> Label the cables if necessary.