GE Logiq 9 Service Manual

GE MEDICAL SYSTEMS PROPRIETARY TO GE
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IRECTION 2294854-100, REVISION 3  LOGIQ™ 9 PROPRIETARYMANUAL 
Chapter 7 Diagnostics/Troubleshooting 7-23
7-7-4-1Board-Level SCB Diagnostics (cont’d)
•SCB PCI Interface Diag: Tests the Host’s ability to communicate with the SCB via the secondary 
PCI bus.
NOTE: A preferred test strategy for the PCI 9054 Interface is detailed in Section 7-8.
•SCB Memory Diag: Tests all of the on-board memory, including registers. Some on-board RAM 
requires other functionality (DSP...

GE MEDICAL SYSTEMSPROPRIETARY TO GE
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IRECTION 2294854-100, REVISION 3  LOGIQ™ 9 PROPRIETARYMANUAL   
7-24 Section 7-7 - Acquisition Diagnostics
7-7-4-2 Board-Level BMP Diagnostics
•All Board-Level BMP Diags: Tests vector generation and Scan Bus emulation on the BMP. This 
configuration further tests the SCBs Clock Generation and PCI bridge, but does not rely on the 
Scan Sequencer or Image Port functions of the SCB.
Not tested on the BMP, with this diagnostic, are its abilities to receive and correctly...

GE MEDICAL SYSTEMS PROPRIETARY TO GE
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IRECTION 2294854-100, REVISION 3  LOGIQ™ 9 PROPRIETARYMANUAL 
Chapter 7 Diagnostics/Troubleshooting 7-25
7-7-4-3 Board-Level EQ Diagnostics
•All Board-Level EQ Diags: More of the SCB is utilized. Specifically, this diagnostic tests the 
following SCB functions:
- PCI Bridge
- Clock generation
- Scan Bus generation 
- TxSync generation
- RxSync generation
- Image Port
In terms of EQ functionality, what are not tested with this configuration, are any abilities to...

GE MEDICAL SYSTEMSPROPRIETARY TO GE
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IRECTION 2294854-100, REVISION 3  LOGIQ™ 9 PROPRIETARYMANUAL   
7-26 Section 7-7 - Acquisition Diagnostics
7-7-4-3Board-Level EQ Diagnostics (cont’d)
•EQ Signal Path Diag: Tests the entire EQ data path, in all its modes and available options. This 
diagnostic will utilize the TGC RAM in conjunction with a constant value loaded into the Input Barrel 
Shifter. Scans will then be run, under the control of the SCB. In this way, the TGC section of the 
board can both be...

GE MEDICAL SYSTEMS PROPRIETARY TO GE
D
IRECTION 2294854-100, REVISION 3  LOGIQ™ 9 PROPRIETARYMANUAL 
Chapter 7 Diagnostics/Troubleshooting 7-27
7-7-4-5 Board-Level TD Diagnostics
•All Board-Level TD Diags: This configuration, again, tests the SCBs Clock Generation and PCI 
Bridge. Additionally, the TD access functionality is more fully tested, building on the SCBs board-
level tests.
The following subsections outline the Board-Level TD Diagnostics.
•TD Memory Diag: This diagnostic shall test all of the...

GE MEDICAL SYSTEMSPROPRIETARY TO GE
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IRECTION 2294854-100, REVISION 3  LOGIQ™ 9 PROPRIETARYMANUAL   
7-28 Section 7-7 - Acquisition Diagnostics
7-7-4-7 System-Level Digital Diagnostics
•All System-Level Digital Diags: Targets system communications and digital system functions 
(those functions which rely on multiple boards for performance, but do not target analog circuitry).
•TD Access Diag: Tests all of the Access Modes utilized for Host/TD communication, as well as 
Channel RAM to Rigel transfers....

GE MEDICAL SYSTEMS PROPRIETARY TO GE
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IRECTION 2294854-100, REVISION 3  LOGIQ™ 9 PROPRIETARYMANUAL 
Chapter 7 Diagnostics/Troubleshooting 7-29
7-7-4-8 System-Level Analog Diagnostics
•All System-Level Analog Diags: These tests may involve the entire system or, in some cases, 
only a few circuit boards.
Diagnostics which may utilize the entire system are those which test various analog aspects of the 
system, such as noise floor tests, loopback tests, etc.
Diagnostics which may only utilize a few circuit...

GE MEDICAL SYSTEMSPROPRIETARY TO GE
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IRECTION 2294854-100, REVISION 3  LOGIQ™ 9 PROPRIETARYMANUAL   
7-30 Section 7-7 - Acquisition Diagnostics
7-7-4-8System-Level Analog Diagnostics (cont’d)
•Power Supply Diag: Tests the System voltages available on the EQ. This diagnostic tests the 
following:
- Power supply voltage rail generation.
- Voltage rail loading by installed circuit boards (insomuch as there are no faults on these)
- Pulser HV Level Select functionality, base on the Scan Bus tag
- IIC...

GE MEDICAL SYSTEMS PROPRIETARY TO GE
D
IRECTION 2294854-100, REVISION 3  LOGIQ™ 9 PROPRIETARYMANUAL 
Chapter 7 Diagnostics/Troubleshooting 7-31
7-7-4-8System-Level Analog Diagnostics (cont’d)
•Loopback Diag: Tests the analog front end of the System.
This test utilizes the transmitter of one or more channels to generate a looped-back analog input 
signal for the receiver of each channel. The entire system is required for this diagnostic. With this 
setup (given a known-good digital signal path), analog...

GE MEDICAL SYSTEMSPROPRIETARY TO GE
D
IRECTION 2294854-100, REVISION 3  LOGIQ™ 9 PROPRIETARYMANUAL   
7-32 Section 7-7 - Acquisition Diagnostics
7-7-4-8System-Level Analog Diagnostics (cont’d)
Figure 7-34  Example: Loopback Troubleshooting Hints
Figure 7-35  Example Loopback Test with Probe Attached