GE Vivid S5 N, Service Manual

Page: 386 / 834

GE
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ART
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UMBER
FN091065, R
EVISION
2 VS5 N
AND
VS6 N
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ANUAL
7-2 Section 7-2 - Diagnostics
P R E L I M I N A R Y
Section 7-2
Diagnostics
7-2-1 Diagnostic Tools
The diagnostic tools are provided for checking the system which includes the power supply,
temperature, fan operation, board functions, Back-end signal processing performance, keyboard
operation, peripherals, and so on.
7-2-2 Diagnostic Procedure Summary
The diagnostic tools are used to identify and correct problems, as follows:
• When the system boots up, it loads all the required drivers and establishes communication with the
front board, via the PCI bus. Check the system presets to verify that good unit performance can be
achieved.
• When the Back End is operating, you can verify proper voltages and temperatures in the Front End
and in the Power Supply. To check the Front End parts, the tests must follow a logical sequence,
in order to identify the faulty component. For example, testing communication between the Front
End and the Back End begins by testing the RFI board and the PCI bus, before testing all the other
boards,
in the following sequence (as applicable):
* RFI board, TR32 boards, Probe Interface board and Probe Select board
• Many error messages are displayed due to minor changes in calibration that may occur during normal
operation. Before performing diagnostic tests, perform calibration, as described in the subsection
7-4-2-1 "DC Offset Calibration" on page 7-27 .
If error messages are displayed after performing calibration, perform the Front End diagnostics
described in
Section 7-4 "Performing Front End (FE) Diagnostics" on page 7-26 .