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Service Hints & Tips |
Document ID: JBAR-3SHQRX |
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This document is provided to IBM and our Business Partners to help sell and/or service IBM products. It is not to be distributed beyond that audience or used for any other purpose. |
IBM MM55 monitor noise problem
Applicable to: EMEA
TEXT:
The following Tip applies to the MM55 Monitor ( Machine Type 2116 )
PROBLEM DESCRIPTION:
When the power cord is attached to the MM55 ( type 2116) monitor with the on/off switch in the off position, it is possible that there can be a high pitch noise (whistle ) from the monitor.
Monitors affected by this problem were built before 24 September'97 and have a serial number of < 60,0000. The problem is caused by crosstalk onto r805 which causes noise in the surrounding components.
FIX:
The vendor has issued a rework instruction to their repair vendors to solder a 560pf/1kv capacitor from the joint of R805 and R809 to ground. The final fix for boxes built after 24 September was to upgrade/install a new level of PCB card (revision 2).
SAS KEYWORDS:
D/T2116 MM55 MONITOR NOISE
R805 FTSGNK
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Search Keywords |
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Hint Category |
Display/Monitor | |
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Date Created |
12-03-98 | |
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Last Updated |
20-01-99 | |
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Revision Date |
20-01-2000 | |
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Brand |
IBM Monitors | |
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Product Family |
Multimedia (MM50/MM70/etc.) | |
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Machine Type |
2116 | |
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Model |
All | |
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TypeModel |
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Retain Tip (if applicable) |
H057480 | |
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Reverse Doclinks |