Document fcos/A0178-1
FCO #: A0178-1
SYNOPSIS: Audio noise from SunBlade 100 system speakers
DATE: Aug/27/2001
KEYWORDS: Audio noise from SunBlade 100 system speakers
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- Sun Proprietary/Confidential: Internal Use Only -
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FIELD CHANGE ORDER
(For Authorized Distribution by SunService)
SYNOPSIS: Audio Noise from Sunblade 100 system speakers.
Sun Alert: N
TOP FIN/FCO REPORT: No
PRODUCT_REFERENCE: Sunblade 100
PRODUCT CATEGORY: DeskTop / System Board
PRODUCT AFFECTED:
Mkt_ID Platform Model Description Serial Number
------ -------- ----- ----------- -------------
Systems Affected:
------- --------
- A36 - SunBlade 100 xT109xxxxx - xT122xxxxx
X-Options Affected
--------- -------
AFFECTED PARTS:
Part Number Description Model
----------- ----------- -----
375-0096-05(Or Less) System Board 0MB w/o UltraSPA -
(SCSI Devices)
Type Vendor Model SerialNumber(Min) SerialNumber(Max) Firmware
---- ------ ------- ------------------ ------------------ --------
N/A
REFERENCES :
BugID: 4450970
ESC: 530299
ECO: WO_21029
LEAP: 1525
LEAP: 1523
ECO: WO_21023
PROBLEM DESCRIPTION :
Sun Blade 100 systems can produce a quiet, but noticeable noise from
the internal speaker. The pitch or volume of this noise will change
depending on what is displayed. There is no operational impact to the
system.
The Sun Blade 100 ships in 8 bit mode, but if the customer uses
m64config to switch to 24 bit mode, they will experience this problem
depending on what application is displayed. There are no error
messages. The problem is more commonly seen when a Netscape screen is
opened with a white background. This may also happen with any other
application displayed in a full screen.
A limited number of Sun Blade 100 systems shipped between February
26th, 2001 and April 19th, 2001 are affected. These systems will have
serial numbers between xT109xxxxx and xT122xxxxx.
The root cause determined was that the Motherboard used in Sun Blade
100 systems did not have adequate audio ground and was not properly
isolated from SGRAM switching noise. The audio noise is caused by
graphics SGRAM activity dumping current and influencing the audio
analog ground.
Corrective action was implemented at the vendor by adding Ferrite Beads
to the system board as documented in ECO# WO_20840. Corrective action
was put in place in Manufacturing by releasing the 375-0096-07 and
375-3061-01 via ECO WO_21029 on June 6, 2001. Corrective action was
put in place in Enterprise Services via LEAP# 1523 on June 4, 2001 and
LEAP# 1525 on June 6, 2001.
IMPLEMENTATION :
---
| | MANDATORY (Fully Pro-Active)
---
---
| | CONTROLLED PRO-ACTIVE (per Sun Geo Plan)
---
---
| X | UPON FAILURE
---
REPLACEMENT TIME ESTIMATE :
0.5 hours
SPECIAL CONSIDERATION :
CORRECTIVE ACTION :
Upon Failure replace 375-0096-05 (or below) with 375-0096-07 (or above)
or 375-3061-01 (or above.
Identification of Suspect Part
------------------------------
1. Locate the System serial number. If it is between xT109xxxxx and
xT122xxxxx the system may be affected, go to step 2. If the System
serial number is outside of this range the system is not affected.
2. Locate the System Board part number. If it is 375-0096-05 (or below)
the system is affected and the board should be replaced upon failure.
For detailed System Board replacement procedures please refer to
SUN System Handbook (806-3416). Access at the following URL;
http://docs.sun.com/htmlcoll/coll.724.1/iso-8859-1/SBLADE100SVC/index.html
For Instructions on Removing the System Board;
http://docs.sun.com/htmlcoll/coll.724.1/iso-8859-1/SBLADE100SVC/chap8.htm#3431
For Instructions on Replacing the System Board;
http://docs.sun.com/htmlcoll/coll.724.1/iso-8859-1/SBLADE100SVC/chap8.htm#180684
COMMENTS :
BILLING TYPE:
Warranty: Sun will provide parts at no charge under Warranty
Service. On-Site Labor Rates are based on how the
system was initially installed.
Contract: Sun will provide parts at no charge. On-Site Labor Rates
are based on the type of service contract.
Non Contract: Sun will provide parts at no charge. Installation by
Sun is available based on the On-Site Labor Rates
defined in the Price List.
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Implementation Footnote:
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i) In case of Mandatory FCOs, Enterprise Services will attempt to contact
all known customers to recommend the part upgrade.
ii) For controlled proactive swap FCOs, Enterprise Services mission critical
support teams will initiate proactive swap efforts for their respective
accounts, as required.
iii) For Replace upon Failure FCOs, Enterprise Services partners will implement
the necessary corrective actions as and when they are required.
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