KASC Fan Replacement

Prerequisites

Table 1 Personnel requirements
Required persons	Preliminary requirements	Procedure	Finalization
1	Not Applicable	30 minutes	For DV: 15 mins. For Voyager and Pioneer: 60 mins.

Table 2 Tools and test equipment
Item	Quantity	Effectivity	Part number	Manufacturer
Standard Tool	1	-	-	-

Table 3 Replacement parts
Item	Quantity	Effectivity	Part number	Manufacturer
KASC Fan	1	-	Refer to FRU Manual.	-

Table 4 Safety

ELECTROCUTION HAZARD!
DANGEROUS AND/OR FATAL VOLTAGES ARE PRESENT IN THE ENERGIZED CABINET.
Follow loto steps as given in first section of this document to disable and verify safe voltage levels.

Never turn an ICN ON/OFF from the power button on the front. The ICNs have software running on disk drives that can be corrupted if not shut down properly. Follow the procedure referenced below for removing power to the ICN chassis. Failure to properly power down an ICN can result in premature ICN failure.

From the Common Service Desktop, turn off the ICN(s) (see ICN On/Off Procedure).
Perform LOTO on the reconstruction equipment. See the MR Service Safety Manual, PN 5452735.
Open PGR cabinet.
Disconnect all connectors and cables from KASC, except for any SMB terminators on the detector boards. Leave the terminators in place.

Figure 1.
Remove 18 screws and remove the KASC fan assembly.

Figure 2. KASC Fan Assembly
Install the new module by reverse order of removal.

Remove LOTO from the reconstruction equipment. See the MR Service Safety Manual, PN 5452735.
Turn the ICNs on per the ICN On/Off Procedure.
note:
For the first 3 or 4 minutes, LEDs come on only at the rear of the ICN, next to the power cables. After 3 to 4 minutes, you will hear the ICN fans come on and then the LED at the front of the ICN starts flashing.
Perform a TPS reset, and then do a check scan to make sure the system operates correctly.