Removal/Replacement of Card Components

Replaceable card components are socketedto facilitate their removal and replacement.

PROM and Termlnation SIPS

CAUTION

Observe antistatic precautions when handling thesecomponents. When

 

removed from the board, thesecomponentsshould be placed in antistatic

 

containers (such asconductive box 15404929 with antistatic foam insert

 

92112794). Minimize touching the connector pins.

It maybe necessaryto remove ProgrammableRead Only Memory (PROM) devicesand termination resistors for the following reasons:

nThe components may be faulty.

H PROMS must be replaced when upgrading to newerversions.

Note

The PROM firmware version is displayed during systemboot and can

 

also be determined from the,scsipbadiagnostic.

To remove these components, proceed asfollows:

1.Remove the card from the hostcomputer asdescribed earlier in thii chapter.

2.Use a “chipextractor” or similar tool to gently pry and remove eachcomponent from its socket.

CAUTION

Excessiveprying and pressure can damagethe component or its socket.

 

Use care during removal.

Service Information 2-l 1

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Image 48
HP 28642A manual Removal/Replacement of Card Components, Minimize touching the connector pins, Use care during removal