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3.237 bytes |
Service Hints & Tips |
Document ID: GSMH-3DXG79 |
PCServer720 - Bridge Card EMC shield causes system failure
Applicable to: World-Wide
Symptom
The PC Server 720 (8642) hangs or fails to boot.
Problem Isolation Aids
None
Fix
Inspect the EMC shield on the bridge card. Locate the metal clip (one of four) on the component side near capacitor C66. If the clip appears too close to capacitor C66, remove the EMC shield, and cut out the corner of the metal clip to increase the clearance from the capacitor (Recommended).
-OR-
Remove the EMC shield, and insulate the edge of the metal clip with electrical tape, and re-install the shield (Alternative).
Refer to the diagram below:
--------------------------------------------------------------
| C-BUS II PCI BUS BRIDGE ____ ____ ____ |
| ASSY __________ | | | | | | |
| MADE IN U.S.A. | | | | | | |
| | | | | | | |
| ---- ---- ---- |
| ____ ____ ____ |
| | | | | | | |
| | | | | | | |
| | | | | | | |
| ---- ---- ---- |
| ____ ____ ____ |
| | | | | | | |
| | | | | | | --- --- --- --- --- |
| | | | | | | | || || || || | |
| ---- ---- ---- _ _ --- --- --- --- --- __|
-------------------------_____|_|______ --- --- --- |
|||||||||||| ||||||||||| | | ||||| |||||||||||||||
------------ ----------- | | ----- --------------
C66 C67
Some bridge cards were undercut at the EMC shield attach point which could cause a short to the C66 capacitor.
SAS KEYWORDS:
PSY2 UNCLASSIFIED PSY2PART PSY2ADPT
71G0694 P/N71G0694 76H7134 P/N76H7134
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Search Keywords |
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Hint Category |
Adapter Cards, Lock-up/Hang, Retain | |
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Date Created |
03-02-97 | |
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Last Updated |
28-05-98 | |
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Revision Date |
27-05-99 | |
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Brand |
IBM PC Server | |
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Product Family |
PC Server 720 | |
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Machine Type |
8642 | |
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Model |
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TypeModel |
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Retain Tip (if applicable) |
H136268 | |
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Reverse Doclinks |