Gantry Stationary (CFC) Fan Control Board Replacement

Prerequisites

Table 4. Safety

Follow ALL Electro-Static Discharge procedures. Always use ESD Wrist Strap and grounding cords. The use of a ground monitor is suggest.

Follow ALL required safety and PPE procedures customary for your organization, when working on this product.

Overview

This procedure defines the steps necessary to replace the stationary side Fan Control Module.

Remove the gantry right side cover and disable “Axial Drive”, “HVDC” and “120VAC” switches from the service switch panel.
Remove the gantry left side cover, the CFC module is located on the left side of the gantry.
Loosen two screws to remove the CFC housing cover.

Figure 1. CFC Module
Disconnect cable connectors from the CFC board J1, J7 and J4T.

Figure 2. CFC Board
The CFC board is secured to housing with 8 screws, remove all screws with a hex wrench.
Remove the defective CFC board and get the new one from anti-static bag.
Install the new CFC board using the 8 screws.
Reconnect all cable connectors removed, reference section above.
Turn ON “Axial Drive”, “HVDC” and “120VAC” switches.
Verify that the CFC board is operating normally.
Install the CFC housing cover, and restore the gantry to original configuration.

Monitor the operator message area until the system indicates the detector temperature has returned to normal.
Perform a Fastcal from the Daily Prep button on the Operator console.
Perform a Quality Assurance Test from the Functional Checks menu of the service manual to ensure system operation.