_ DEC-O-LOG for PB22H

_ DOL, PB22H-O001, NMI errors reading floppy disk

OCT 93 

PROBLEM:   System intermittently exhibits NMI errors 
when reading from floppy.  The error is flagged by aparity 
error, and can result in system crash, and/or data 
corruption. 

FIELD EFFECTIVITY:   This "O" coded FCO affects all 
revenue PB22H-CX/KB systems, of product family DEC 
2000 AXP (DECpc-150 AXP) with serial numbers within 
AY325xxxxx and AY312xxxxx, containing CPU  module 
part number 54-20764-01 at revision "E03"  and below.
This FCO incorporates ECO 5420674-TWO002.

SOLUTION:  Board  swap  CPU  Board,  Part  No. 
54-20674-01, Revision "E03" or below, with  Revision 
"E04" on all revenue systems, with serial numbers 
within AY325xxxxx and AY312xxxxx.
Manufacturing began shipping Revision E04 as of 
June 11, 1993.

QUICK CHECK:   Check that the system serial number is 
within  AY325xxxxx  and  AY312xxxxx,  and  that 
motherboard components E125 and E163, are labeled 
with manufacturer's Part No. 74FCT374AT.  Refer to 
instructions to locate parts.  Test to ensure data can be 
read from floppy under NT Beta2 and later.

FCO KIT ORDERING
EQ-01687-01	54-20674-01 CPU Module at   
                Revision "E04"

FA-05023-01	FCO Document


_ DOL, PB22H-O002, Firmware not OSF/1 compatible

APR 94

APPLICABILITY: 
This "O" coded FCO affects all revenue PB22H-CX/KB 
systems, of product family DECpc-150 AXP with serial 
number  within  the  range  AY325XXXXX  and  
AY312XXXXX,  containing  ADAPTEC  1742A  SCSI 
controller  module  part  number  30-40383-01  at  Rev. 
"A03".  This FCO should be ordered or implemented only 
upon customer  request.  This  FCO  incorporates ECO 
3040383-DSG001. 		                       

PROBLEM & SYMPTOM:                                                           
The current  firmware  of  the  ADAPTEC  1742A  SCSI 
controller is not compatible with OSF/1 operating system.  
Customers with revenue systems within the above serial 
number  range,  currently  running  NT  or  OpenVMS 
Operating  Systems  and  want  to  run  OSF/1  on  their 
system  will  experience  disk  access  problems  and/or 
erratic  system  behavior  if  OSF/1  is  loaded  into  the 
system.      	       

SOLUTION:                                                                    
On  customer  request  only,  replace  EPROM  on 
ADAPTEC 1742 SCSI controller with new EPROM chip 
containing the latest microcode Rev.  "G.2" (part of EQ 
kit)  

QUICK CHECK:                                                              
Check that the ADAPTEC 1742 SCSI controller module is 
at Rev. "A04 Locate component location U10, (socketed 
EPROM located near red LED "DS1") has the inscription 
"BCE3" which denotes the checksum for microcode Rev. 
"G.2".					
			      
ALTERNATE QUICK CHECK: Use the VMS/OSF 
console and use SHOW DEVICE and note under the 
Rev. column what the host device 1742A lists as the Rev.  
In this manner the revision of the ADAPTEC 1742 SCSI 
controller module can be determined without opening the 
system enclosure.		               

FCO KIT ORDERING:

EQ-01697-01      1  23-681E6-00 EPROM chip containing G.2 firmware
                 1  QC-008AA-HC.1.5 Firmware upgrade and ECU Diskette Kit      
        	    Kit Includes: 
	            1 - NT ECU diskette, Part# AK-PYCJC-CA      
	            1 - Firmware Upgrade Diskette Part# AK-Q19XB-CA      
	            1 - OVMS/OSF-1 ECU  Diskette V 1.2  Part# AK-Q2CRB-CA      
	            1 - User License Part# AV-PRRRA-TH)     
FA-05034-01         1   PB22H-O002 FCO Field  Application Document