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- Sun Proprietary/Confidential: Internal Use Only -
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                            FIELD INFORMATION NOTICE
                  (For Authorized Distribution by SunService)

FIN #: I0843-1

Create Date: Jun/25/02

Keywords: 

New Motherboard FRU for Sun Blade 100 systems requires modified installation procedure

SunAlert: No

Top FIN/FCO Report: No

Products Reference: Sun Blade 100 Motherboard

Product Category: Desktop / Service

Product Affected: 

Systems Affected:
-----------------  
Mkt_ID   Platform   Model   Description          Serial Number
------   --------   -----   -----------          -------------
  -        A36        -     Sun Blade 100              -


X-Options Affected:
-------------------
Mkt_ID   Platform   Model   Description   Serial Number
------   --------   -----   -----------   -------------
  -         -         -          -              -

Parts Affected: 

Part Number       Description                         Model
-----------       -----------                         -----
F375-3123-01      FRU ASSY OEM MB SB 100 W/O TRAY       -

References: 

ECO:  WO_24112

DOC:  806-3416-10: Sun Blade 100 Service Manual.

Issue Description: 

The Sun Blade 100 is supported by 4 different versions of Motherboards
(see TABLE 1).  The latest version of the Motherboard, P/N 375-3123-01,
has just been released.  Service personnel need to be aware of the
compatibilities among these different board versions, and should be
aware of the special installation procedure for the 375-3123 board.

For quick installation/removal, the Sun Blade 100 Motherboard FRU has
been assembled to the Motherboard tray.  The primary difference between
the Motherboards is EMI compliance and physical fit of the associated
Motherboard tray. 
	
Due to a shortage of trays to support the Class A systems, a new FRU
has been created.  The new FRU (P/N 375-3123) is the Motherboard
without the tray.  The repair strategy for P/N 375-3123 requires the
tray in the system to be re-used.  
	
The Sun Blade Motherboard chronology is as follows:
	
   375-0096: Original Sun Blade 100 Motherboard.  It was used on the 
             first 15000 systems and is Class A Compliant.
	
   375-3061: This Motherboard incorporates several fixes including the 
             new tray which makes the system class B compliant.  The tray 
             used on 375-3061 is "NOT" compatible with and will not fit 
             in the 15000 Class A chassis currently in the Field.  This 
             is the Motherboard that is used on current production systems. 
	
   375-3092: The tray used on 375-3092 "IS" compatible with the 15000  
             Class A chassis currently in the field.  

   375-3123 This Motherboard FRU contains the Motherboard without the tray.  
            The replacement strategy is to mount the Motherboard to the tray 
            contained in the system to be repaired.
         
NOTE: The Motherboards contained in the 375-3123, 375-3092, and 375-3061
      FRUs are identical.  The only difference is the tray.
	  
         		       TABLE 1
                               =======
        -------------------------------------------------------
       |          |               |      |    Compatibility    |
       | Part #	  | Where Used	  | EMI	 | Backward / Foreward |
       |==========+===============+======+=====================|              
       | 375-0096 | 1st ~15K sys  | A	 | N/A	    No         |
       | 375-3061 | All systems	  | B	 | No	    Yes        |
       | 375-3092 | 1st ~15K sys  | A	 | Yes	    No         |
       | 375-3123 | 1st ~15K sys  | A**  | Yes	    Yes        |
        -------------------------------------------------------
	
**375-3123 is the same board used in 375-3061 and can be installed in
any Sun Blade 100 system (re-uses tray already in system).  For ease of
installation we are only recommending this FRU be used to support Class
A systems (identified by the presence of 375-0096 or 375-0092).
	
Field personnel can identify Sun Blade 100 systems compliance levels by
referring to the EZ label on the left corner of the system (next to the
smart card reader).  Class B compliant systems are identified by the
letter "A" on the EZ label.  Class A compliant systems will not have
have an alpha character on the EZ label.  
	
Field personnel can also identify Sun Blade 100 system compliance levels 
by referring to the part number of the Motherboard to be removed.
  
        -------------------------------------------------	
       | Item  |  P/N       | EMI Class  |  Replace with |
       |=======+============+============+===============|
       |  1    | 375-0096   |	 A	 |  1, 3, or 4   |
       |  2    | 375-3061   |	 B	 |  2            |
       |  3    | 375-3092   |	 A	 |  1, 3, or 4   |
       |  4    | 375-3123   |	 A	 |  1, 3, or 4   |
        -------------------------------------------------

Implementation: 

---
        |   |   MANDATORY (Fully Proactive)
         ---    
         
  
         ---
        |   |   CONTROLLED PROACTIVE (per Sun Geo Plan) 
         --- 
         
                                
         ---
        | X |   REACTIVE (As Required)
         ---

Corrective Action: 

The following recommendation is provided as a guideline for authorized
Enterprise Services Field Representatives who may encounter the above
mentioned problem.

1. Use FRU 375-3123 as a replacement in Class A Sun Blade 100 systems only.

2. When using P/N 375-3123 as a Sun Blade Motherboard replacement,
   field personnel should install the new Motherboard into the existing
   Motherboard tray.  This process involves the removal and replacement
   of five (5) Phillips screws and two (2) 3/16th hex nuts.
  
   See Section 8.5 in the Sun Blade 100 Service Manual, 806-3416-10, for 
   detailed Motherboard installation/removal procedures.

Comments: 

None

============================================================================

Implementation Footnote: 

i)   In case of MANDATORY FINs, Enterprise Services will attempt to    
     contact all affected customers to recommend implementation of 
     the FIN. 
   
ii)  For CONTROLLED PROACTIVE FINs, Enterprise Services mission critical    
     support teams will recommend implementation of the FIN  (to their  
     respective accounts), at the convenience of the customer. 

iii) For REACTIVE FINs, Enterprise Services will implement the FIN as the   
     need arises.
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