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                        FIELD INFORMATION NOTICE
                  (For Authorized Distribution by SunService)

FIN #: I0399-2

Create Date: Jul/15/98

Keywords: 

Updated FIN.-Misdiagnosed Power Supply Failures on Enterprise 450 Systems.

Top FIN/FCO Report: No

Products Reference: E450 Power Supply Memory Latch Function

Product Category: Server / Power

Product Affected: 

Systems Affected
---------------- 

Mkt_ID   Platform   Model   Description              Serial Number
------   --------   -----   -----------              -------------
   -     E450       ALL     Ultra Enterprise 450          -
   -     E450       ALL     Ultra 450                     -

Parts Affected: 

Part Number   Description   Model
-----------   -----------   -----

300-1302-0X   560W power supply    -
300-1359-0X   605W power supply    -

References: 

MANUAL:  805-0429-10  Ultra Enterprise 450 Server Owner's guide
MANUAL:  805-0430-10  Sun Ultra 450 Workstation Owner's Guide
ECO:     WO_11640
FIN:     I0399-1

Issue Description: 

Serial Number
------   --------   -----   -----------              -------------
   -     E450       ALL     Ultra Enterprise 450          -
   -     E450       ALL     Ultra 450                     -


PART NUMBERS AFFECTED: 



Part Number   Description   Model
-----------   -----------   -----

300-1302-0X   560W power supply    -
300-1359-0X   605W power supply    -


REFERENCES:

MANUAL:  805-0429-10  Ultra Enterprise 450 Server Owner's guide
MANUAL:  805-0430-10  Sun Ultra 450 Workstation Owner's Guide
ECO:     WO_11640
FIN:     I0399-1


PROBLEM DESCRIPTION

The power supply used on Ultra 450 workstations and Ultra Enterprise  
450 servers has a memory latch function that allows the power supply  
to "remember" its last power ON/OFF state in response to a power out-
age or removal of the AC power cord.  This feature allows the power  
supply to resume operation automatically once power is restored.  It 
also enables hot-swapping of power supplies.
 
Under some circumstances, this feature can be misdiagnosed as a power 
supply failure.  For Example, If you remove a power supply from a system  
that is powered off and attempt a hot-plug installation into a system  
that is powered on, the power supply will remain in the Off state. This 
should not be interpreted as a power supply failure.

*This Updated FIN has been released with the intent to provide instruc-
tions for E450 power supply maintenance in such instances where Power
Management has been configured.

Implementation: 

---
    	|   |  	MANDATORY (Fully Pro-Active)
  	 ---    
  	 
  
         ---
    	|   | 	CONTROLLED PRO-ACTIVE (per Sun Geo Plan) 
  	 --- 
  	 
  	   			
         ---
    	| X | 	REACTIVE 
  	 ---

Corrective Action: 

Customers and Field Service Representatives that encounter the above 
 mentioned E450 Power Supply Memory Latch Function are advised of the
 following:

 1. To�activate the power supply, simply turn the front panel keyswitch  
    from the Power-On position to the Diagnostics position, and then back 
    to the Power-On position.
 
 2. Alternatively, you may press the Power-On key on a Sun Type-5 keyboard 
    attached to the system if they do not have "power manager" configured.
    
 For a system that has power management configured, pressing the Power-On
 key will initiate the suspend function.  A window appears on the screen
 that lets you confirm or cancel the suspend request.  In this scenario,
 users should cancel the suspend request.  Even though the request is
 canceled, the power supply's internal memory latch still gets reset to  
 the ON state, as intended.

 *NOTE:  This scenario would only apply to the Ultra 450 workstation, as
         power management is not supported on the Enterprise 450 server 
         (by default, Power management is disabled on the E450 server).

Comments: 

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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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