- Topic ID: id_11039060
- Version: 3.0
- Date: May 23, 2022 11:26:04 PM
Vyper DAS Power Board (DPB) Replacement
Prerequisites
This procedure defines the replacement process for the Vyper DAS power board (DPB).
1 Preparation
Procedure
- Move the table cradle to the home position, and position the table to its lowest elevation.
- Remove the gantry right side cover.
- notice
- Always turn OFF the HVDC before the 120VAC. Turning OFF 120VAC power before HVDC power can result in equipment damage.
- Turn OFF Axial Enable, HVDC, and 120VAC switches on the service switch panel.
- Remove the gantry side, top and front covers.
- Position the DAS at the 12 o'clock position.
- Lock the gantry in position using the rotational lock.
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2 Board Removal/Installation
Procedure
- Release the cable clamps holding the fan controller power cable and signal cable.
- Disconnect the cable connectors from the KFC J2 and J3A.
Figure 1. Release the Cable Clamps and Disconnect Cable Connectors
- Demount the Vyper plenum ASM by unscrewing its six M10 head
cap screws.
Figure 2. Vyper Plenum ASM Removal
- notice
- Follow ALL Electro-Static Discharge procedures. Always use ESD Wrist Strap and grounding cords. The use of a ground Monitor is suggested
- Remove nine screws from the DPB.
Figure 3. Screws Removal
- Install two board handle JIGs (6488042, shipped with system
shipping collector) onto the DPB, then pull the DPB from the DAS backplane
(DBP) by holding JIGs.
Figure 4. JIGs Position
- Get new DPB from anti-static bag.
- Let the locating pins through DPB, then insert pinouts of DPB to DBP.
- Secure all the screws. Torque M4 hex screws to 2.3N-m.
- Remount the Vyper plenum ASM by securing its six M10 head cap screws with Loctite 242. (Torque: 38.4N-m)
- Reconnect the cable connectors to the KFC J2 and J3A and tie cables with cable clamps.
- Disengage the rotational lock.
- Turn on Axial Enable, HVDC, and 120VAC switches.
- Reassemble gantry covers.
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