SYSTEM SUPPORT SERVICES 11046 State Road 52, Hudson, FL 34669 ● (727) 243-3656

FIELD TECHNICAL BULLETIN # 8

SCOPE

BACKGROUND

In COMTROL I systems, the Master Reset line on the Remote Chassis is not used, except on power-up. An R/C circuit on the 30-0001 CDI board generates a pulse on power-up to reset all FIMs in the chassis.

Noise on this line can cause spurious resetting of FIMs, causing loss of data. FIMs such as the 30-0166 Serial Data Board have their own local R/C networks to reset the card on power-up. Thus, the Master Reset line on the backplane is redundant, and a source of potential problems.

SOLUTION

An Engineering change has been processed to disconnect the Master reset line from the backplane and ground the input to eliminate noise from spuriously resetting the FIM. The new hardware revision level of the board is Revision E.

RECOMMENDATIONS

It is recommended that all boards be upgraded as soon as practical. Because the change involves a hardware modification, it is recommended that the modules be returned to SYSTEM SUPPORT SERVICES for retrofit. The cost to update the hardware and fully test, align, and repair the unit as necessary is $ 370.00 per board.

ORDERING INFORMATION

To have SYSTEM SUPPORT SERVICES repair, test and update the modules as necessary, contact Customer Service for a Return Material Authorization number. Have available the part number of the module to be repaired and upgraded, and the quantity.

 E-mail: service@sysupport.com

Other ways to contact us:

TEL: (727) 379-0484

FAX: (727) 379-0831

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Revised: April 24, 2006 .