GE Vivid 7 Service Manual

							
GE HEALTHCARE
DIRECTION FC091194, REVISION 11    VIVID 7 SERVICE MANUAL 
Chapter 6 - Service Adjustments 6 - 1
Chapter 6
Service Adjustments
Section 6-1
Overview
6-1-1 Purpose of this Chapter
This section describes how to adjust the scanner. 
6-1-2 Contents in this Chapter
Section 6-2
Date and Time Adjustments
Please refer to:  3-7-1-3 Date and Time Adjustments on page 3-29 .
Section 6-3
Daylight Saving Time (DST) Adjustments
From the factory, the automatic  DST function has been disabled. 
Manually adjust the DST at the start and at the end of the DST period (if needed).
Section 6-4
Power Supply Adjustments
It is not possible to adjust th e power supplies on this unit.
Table 6-1    Contents in Chapter 6
SECTIONDESCRIPTION
PAGE 
NUMBER
6-1 Overview 6-1
6-2 Date and Time Adjustments 6-1
6-3 Daylight Saving Time (DST) Adjustments 6-1
6-4Power Supply Adjustments6-1
6-5LCD Monitor Adjustments6-2
6-6CRT Monitor Adjustments6-3
6-7 Front-End Alignment Procedure  (Beamformer Calibration) 6-6
6-8 Direction Lock and Brake Adjustment 6-9 
						

							
GE HEALTHCARE
DIRECTION FC091194, REVISION 11    VIVID 7 SERVICE MANUAL 
6 - 2  - 
Section 6-5
LCD Monitor Adjustments
6-5-1 Overview
This procedure describes how to adjust the LCD moni tor for use with Vivid 7, software version v6.x and 
newer. It also describes how to set up the Vivid 7 to the factory default for LCD use.
The LCD adjustment procedure contains two main tasks: 
1.) Adjust LCD monitor
2.) Select gamma curve
6-5-2 Cautions and Warnings
N/A
6-5-3 Access to Adjustments
The adjustments of the LCD monitor is done via co ntrols (buttons) on front of the LCD monitor.
On the LCD monitor: 
• Press  Menu to activate the  OnsScreenDisplay  (OSD ) menu. 
• Navigate by using the  up/down arrow buttons.
• Select by using the  Return button. 
• Back up in the menu tree using the  Menu key. 
The  AUTO  and PIP keys should not be used.
The menu system has five main icons/menus: 
• Input
•Picture
• MagicColorPro
•PIP
• Setup 
						

							
GE HEALTHCARE
DIRECTION FC091194, REVISION 11    VIVID 7 SERVICE MANUAL 
Chapter 6 - Service Adjustments 6 - 3
Section 6-6
CRT Monitor Adjustments
6-6-1 Cautions and Warnings
N/A
6-6-2 Access to Adjustments
The adjustments of the monitor is done via c ontrols (buttons) on front of the monitor.
6-6-3 Degaussing the CRT Monitor
Degaussing refers to the process of removing magnetic-field effects from the monitor. Operation of the 
monitor within a magnetic field may adversely effect co lor purity. Degaussing can be used to correct this 
problem.
To activate the manual degauss:
1.) Press either the  >  monitor adjustment button while the  brightness/contrast adjustment 
indicator is not displayed on the monitor.  To cancel the manual degauss, press the  >  
adjustment button again.
2.) Press the toggle button for brightness and contrast.
3.) Press either the  >  monitor adjustment.
NOTE: The monitor automatically degausses at power on. 
						

							
GE HEALTHCARE
DIRECTION FC091194, REVISION 11    VIVID 7 SERVICE MANUAL 
6 - 4 Section 6-6 - CRT Monitor Adjustments
6-6-4 Adjusting the CRT’s  Contrast and Brightness
The display monitor’s contrast and brightness contro ls may need periodic adjustment due to changes 
in ambient light. They are adjusted from the three buttons on the front part of the display monitor.
6-6-4-1 Adjust Contrast The factory default Contrast settings:
• BT03/04/05/06 units:  Contrast = 65% 
• BT02 units: Contrast = 100%
Follow the steps below to adjust the monitor’s contrast setting:
1.) Press Left button on the display monitor once (see  Figure 6-1 Adjust Contrast and Brightness on 
page 6-4 ).
2.) Press Right button to increase contrast.
3.) Press Center button to decrease contrast.
The amount of contrast is shown on a slider on the screen (see  Figure 6-1 Adjust Contrast and 
Brightness on page 6-4 ).
Figure 6-1   Adjust Contrast and Brightness
Left 
Button
Right 
Button
Center 
Button
CONTRAST
BRIGHTNESS 
						

							
GE HEALTHCARE
DIRECTION FC091194, REVISION 11    VIVID 7 SERVICE MANUAL 
Chapter 6 - Service Adjustments 6 - 5
6-6-4-2 Adjust Brightness The factory default Brightness settings:
• BT03/04/05/06 units: Brightness = 32% 
• BT02 units: Brightness = 40%
Follow the steps below to adjust  the monitor’s brightness setting:
1.) Press the Left button on the display monitor twice (see  Figure 6-1 Adjust Contrast and Brightness 
on page 6-4 ).
2.) Press the Right button to increase brightness.
3.) Press the Center button to decrease brightness.
The amount of brightness is shown on a slider on the screen (see  Figure 6-1 Adjust Contrast and 
Brightness on page 6-4 ). 
						

							
GE HEALTHCARE
DIRECTION FC091194, REVISION 11    VIVID 7 SERVICE MANUAL 
6 - 6 Section 6-7 - Front-End Alignm ent Procedure (Beamformer Calibration)
Section 6-7
Front-End Alignment Procedure (Beamformer Calibration)
6-7-1 Introduction
Each A/D converter on the BF boards has an offset  error (i.e. gives an output code different from 00 Hex 
with an input voltage of 0V). This offset error may  cause artifacts in some modes of operation (2D and 
TVI) due to inaccuracy in the demodulation process.  In order to deal with this problem, the software has 
support for cancelling of these offs et errors. This is done by first reading the  offset error and then 
accounting for these numbers later during the normal processing.
Beamformer Calibration is performed to calibrate each ADC channel of the two Beam Former (BF) 
board inputs. The system ca librates the Beamformer ADCs to zero output when there is no signal on 
the input.
These bias voltages are stored on  hard disk in Back-End Processor. 
The Front-End Alignment procedure can be performe d either as described below, or via the GSUI. 
See:  7-6-7 Calibration on page 7-33 .
6-7-2 When to Use this Procedure
This procedure should be performed;
• when installing a new Vivid 7
• after software has been updated or replaced
• when BF boards have been interchanged 
• when a BF board has been replaced 
• when the Back-End Processor has been replaced 
						

							
GE HEALTHCARE
DIRECTION FC091194, REVISION 11    VIVID 7 SERVICE MANUAL 
Chapter 6 - Service Adjustments 6 - 7
6-7-3 Front-End Alignment Procedure
1.) Disconnect all connected probes.
2.) Turn on the Vivid 7.
3.) Press  CONFIG
 (F2) and log on as  adm, see  4-2-4 Log On to the System as ‘ADM’ on page 4-12 .
4.) Select  System
5.) Select  DC Offs. Cal  to start the DC Offset calibration of the Beam Formers (Front-End Alignment).
6.) Wait for the calibration to take place. 
Front-End Alignment Description - Each A/D converter will get 0V inpu t (by setting ATGC to minimum). 
- One by one channel will be digitized and the re sult put in the IQ buffer on the RFT board. 
- The BEP will then read the IQ buffer and co mputes a value per channel. These computed 
values are compared to an upper/lower limit. 
- If all read values are ok, the message PASSED  will appear. If values exceeding the limits are 
read, the system will prompt yo u with FAILED and a message will tell you which BF board is 
bad. 
- The resulting offsets for each channel are stor ed in a file on the Back-End Processor’s hard 
disk.
- The values can be plotted in a diagram  Show graph). 
7.) When finished, select  Show Graph.
Wavy line signifies system has been calibrated. See  Figure 6-3 DC Calibration of the Beam Former 
AD-converters Passed on page 6-8 .
A Straight line signifies that the system has no t been calibrated and can be the cause of image 
quality issues. Figure 6-2   Calibration Dialog
Channel Control
DC Offs. Cal Cal. ResetShow graph 
						

							
GE HEALTHCARE
DIRECTION FC091194, REVISION 11    VIVID 7 SERVICE MANUAL 
6 - 8 Section 6-7 - Front-End Alignm ent Procedure (Beamformer Calibration)
6-7-3 Front-End Alignment Procedure (cont’d)
NOTE: The LEDs displayed in the below individual b oard sections are relevant when the system is in 
the default setting (2D-mode).
8.) Restart Vivid 7. 
NOTE: Always reboot the scanner after Front-End Alig nment is finished and verify proper operation.
NOTE: Do Not select “Cal Reset” af ter performing calibration. This will destroy the file located on the 
Back-End Processor, the image  quality will not be optimized and a new calibration will be 
needed. Figure 6-3   DC Calibration of the Beam Former AD-converters Passed 
						

							
GE HEALTHCARE
DIRECTION FC091194, REVISION 11    VIVID 7 SERVICE MANUAL 
Chapter 6 - Service Adjustments 6 - 9
Section 6-8
Direction Lock and Brake Adjustment
6-8-1 Front Caster Brakes  Adjustment Procedure
6-8-1-1 Manpower
2 persons
6-8-1-2 Tools • Hexagon key 3/32” inch
• Phillips screw driver size 2
6-8-1-3 Preparations 1.) Set Rear Brakes to pr event system from rolling.
2.) Remove Front Bumper , see  Front Bumper Removal Procedure on page 8-100 .
6-8-1-4 Front Caster Brakes Adjustment
1.) Use a hexagon key, and screw the adjustment  screw until the opening between brake dogs and 
tires are approximate 2 mm.
2.) Install Front Bumper , see  Front Bumper Installation Procedure on page 8-100 .
3.) Test Front Brakes. Figure 6-4   Front Brakes adjustment
2 mm opening
Brakedog bites
Adjustment screws 
						

							
GE HEALTHCARE
DIRECTION FC091194, REVISION 11    VIVID 7 SERVICE MANUAL 
6 - 10 Section 6-8 - Direction Lock and Brake Adjustment
6-8-2 Direction Lock Adjustment Procedure
6-8-2-1 Manpower 1 person, 30 minutes
6-8-2-2 Tools Open end wrench, 13 mm
6-8-2-3 Preparations 1.) Block Rear Casters.
2.) Push down Direction Lock Pedal.
3.) Turn Casters until they locks  in forward pointing position.
6-8-2-4 Direction Lock Adjustment 1.) Loosen the retaining nuts on the brake rods on both Front Casters to allow room for adjustment.
2.) Remove the lock pins that  secures the balljoints (See Figure 6-5).
3.) Pull balljoints apart.
4.) Each part of the sepa rated balljoint shall match each other wh en the brake lever on the Casters are 
in direction lock position, which is  in left position on both Casters.
Figure 6-5   Front Caster Brake Arm and Ball Joint Parts
Lock pin
Adjustment nut
Retaining nut
Brake lever