HSDA PSU Replacement

Prerequisites

Table 4. Safety

TO PREVENT DAMAGE TO COMPONENTS WITHIN THE HSDA, OBSERVE THE FOLLOWING ESD PRECAUTIONS:
WORK ON A STATIC-FREE MAT.
WEAR A STATIC STRAP TO ENSURE THAT ANY ACCUMULATED ELECTROSTATIC CHARGE IS DISCHARGED FROM YOUR BODY TO GROUND.
CREATE A COMMON GROUND FOR THE EQUIPMENT YOU ARE WORKING ON BY CONNECTING THE STATIC-FREE MAT, STATIC STRAP AND PERIPHERAL UNITS TO THAT PIECE OF EQUIPMENT.
FOR FURTHER INFORMATION REGARDING ESD PROTECTION, REFER TO THE SAFETY CHAPTER IN THIS PUBLICATION

IN ORDER TO MEET EMC REQUIREMENTS, THE CHASSIS MODULES MUST BE PROPERLY INSTALLED AFTER SERVICING. CHECK THAT THE MODULES ARE MOUNTED FIRMLY IN PLACE AND LOCKED DOWN WHERE APPLICABLE.

FOLLOW ALL REQUIRED SAFETY AND PPE PROCEDURES CUSTOMARY FOR YOUR ORGANIZATION WHEN WORKING ON THIS PRODUCT.

Table 5. Required conditions
Condition	Reference	Effectivity
Access to both the front and rear of the Operator Console is required. Move the console away from walls and remove obstacles in room.	-	-
Only trained service personnel should service the GE CT Scanner.	-	-

Overview

This procedure describes and illustrates the steps necessary to replace the High Speed Disk Array (HSDA) Power Supply Unit (PSU) module.

Select one of the following methods to power off the Operator Console:
- If Applications are running, click the Shut Down icon and select Shut Down.
- If Applications are down, open a Unix Shell using the Toolchest. Type: {ctuser@hostname} halt. Press Enter.
The Operator Console monitor will display a ‘System Halted’ message when it is acceptable to power off the Operator Console.
Power OFF the Operator Console at the front panel switch. (See Figure 2.)

Figure 2. Console Power Switch
Perform prescribed Lockout/Tagout procedure. For added protection, disconnect the Twist-N-Lock Main Power Cable from rear of console.

Remove the front and rear Operator Console Covers per prescribed cover removal procedure.
At the rear of the Operator Console, disconnect the AC power Cord from the PSU Module being replaced.
Remove the Phillips Retention Clamp Lock Screw and pull the Retention Clamp down and away from the PSU Module to extract the module from the HSDA Assembly.

Figure 3. HSDA PSU Module Removal
Remove the PSU Module and set aside.
Remove the Cooling Module from the PSU Module by retracting the two (2) Locking Tabs on the Cooling Module then pull the module free from the PSU Module.

Figure 4. HSDA Cooling Module Removal

Install the Cooling Module removed earlier into the replacement PSU Module. Check that the Cooling Module is fully seated in the replacement PSU Module and the Locking Tabs are engaged.
Slide the replacement PSU Module into the HSDA Assembly PSU Module bay.
Make sure the PSU Module is securely inserted, the Retention Clamp is engaged and the Retention Clamp Locking Screw (Phillips) is reinstalled.

note:
IN ORDER TO MEET EMC REQUIREMENTS, THE CHASSIS MODULES MUST BE PROPERLY INSTALLED AFTER SERVICING. CHECK THAT THE MODULES ARE MOUNTED FIRMLY IN PLACE AND LOCKED DOWN WHERE APPLICABLE.
Reconnect the AC Power Cord removed earlier and check that the PSU Module Power Switch is turned ON.

Reconnect the Twist-N-Lock Main Power Cable from rear of console and remove Lockout Tagout protection applied earlier.
Power ON the Operator Console at the console front panel switch.
Visually verify the HSDA Assembly LCD Panel Power LED is illuminated.

Figure 5. HSDA LCD Panel

Verify that the HSDA with replacement PSU Module has powered up and is not displaying any Errors. The PSU Module Status LED located close to the PSU Module Power Switch should illuminate Green.

Figure 6. HSDA PSU Status LED
Visually verify the HSDA Cooling Module Status LEDs are illuminated.

Figure 7. HSDA Cooling Module Status LEDs

note:
See the HSDA Troubleshooting procedure if any errors appear.

Item	Quantity	Effectivity	Part number	Manufacturer
Standard FE Toolkit	1	-	-	-
Small Phillips Screwdriver #2	-	-	-	-