GE MEDICAL SYSTEMS
D
IRECTION 2392751-100, REVISION 3VIVID™ 4 SERVICE MANUAL
Chapter 8 - Replacement Procedures 8-37
8-4-2 TR4 Boards Replacement Procedure
NOTE: The procedure below provides the instructions for replacing any of the TR4 boards ( P/N 2253036).
8-4-2-1 Tools
Use the appropriate flat and Phillips-type screw drivers and an ESD wrist band strap as indicated in the
TR4 Boards replacement procedure.
CAUTION:
DO NOT TOUCH ANY BOARDS WITH INTEGRATED CIRCUITS PRIOR TO
TAKING THE NECESSARY ESD PRECAUTIONS:
1.ALWAYS CONNECT YOURSELF, VIA AN ARM-WRIST STRAP, TO THE ADVISED ESD
CONNECTION POINT LOCATED ON THE REAR OF THE SCANNER (TO THE RIGHT OF
THE POWER CONNECTOR).
2.FOLLOW GENERAL GUIDELINES FOR HANDLING OF ELECTROSTATIC SENSITIVE
EQUIPMENT.
8-4-2-2 Preparation
Shut down the Vivid™ 4 ultrasound unit, as described in Chapter 3 - Installation.
8-4-2-3 TR4 Boards Removal Procedure
1) Remove the FE Board, as described in the Front End Boards Removal Procedure on page 8 - 35.
CAUTION: FRONT END BOARDS ARE HEAVY!
FAILURE TO TAKE PRECAUTIONS WHEN LIFTING , COULD RESULT IN PERSONAL INJURY AND/
OR DAMAGE TO THE SYSTEM.
2.) Place the FE Board on a desk or a stable surface, on top of an ESD mat.
3.) Remove each of the four screws (two from each side) that hold the two brackets that secure the
TR4 boards to the FE Board main plate, as shown in Figure 8-32 below.
Figure 8-32 Location of Screws on Securing Brackets
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