HP 28642A Verify that Resistor Packs are Properly Installed, Two resistor packsmust be installed

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Verify that Resistor Packs are Properly Installed

ASCSIbus hastwo endsbetweenwhich SCSLdevices are attached. Each end of a SCSI bus must be terminated with a resiitor network, or “terminator”. The adapter card contains two resistor packsmounted in socketson the card. These resistor packsact asa terminator for one end of the SCSIbus.

Note	The SCSIport is supported for use only on the end of a SCSIbus. The
	two resistor packsmust be installed.

Visuaily verify that the two resistor packs are installed with the proper orientation. The resistor packsare markedwith a dot on one end and should be oriented asshown in figure 1-5.

Termination Resistors,

Figure l-5. Proper Resistor Pack Orientation

l-10 installing the Adapter

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Contents HP 28642A HP-PB Scsi HP 28655A HP-PB SCSI/ Parallel 5960-3126 El091 HP HP@Hewlett-Packard Company, 1991. AI1rights rcservcd Safety ConsiderationsPrint History Installation and S&vice HP 28642A and HP 28655A at a Glance Product Description This Book Table of Contents Page Installing HP 28642A/28655AAdapter Lnstalllng the HP 28642A/28655A Adapter Observe Antlstatic Precautions Prepare to Install the Adapter CardVerify Product Contents Record Adapter Card Identification Information Gather Tools and Accessories NeededPeripheral to 92222A Dependent requirements that are not noted hereTable l-l. Scsi Cables LengthsDescription meters Create Data corruption Installing the AdapterShut Down the System and SwZtch Off the Computer RemoveCheck the Card’s Hardware Configuration Set the Desired Parity-Checking CapabUity Figure l-4. Default Switch Settings Installing the AdapterAddress = closed = open Installing the Adapter l-9Set the Scsi Bus Address Scsi BusTwo resistor packsmust be installed Verify that Resistor Packs are Properly InstalledSelect an Appropriate Slot Install and Connect the CardHP-Pa Standard Power Symbol Computer hardware limitations for l/O cards, if any Record the Slot NumberSystemperformance implications, if any Prepare the Slot For Use Ignment Hole Page Insert the Card into the Slot Card guides. If the problem persists,get helpAttach the Card Cables Supplied with this product provides a thumbscrew connectorProperly on the SCSIbus Installing the Adapter l-19Connect Your Peripheral Devices Connect Your Single-Ended Scsi DevicesTerminate the Scsi Bus Device operation on the SCSIbus Scsi Cable Length Example 12. Scsi Bus Example Installing the AdapterTwo meters TurnPowerOn to Peripherals, Then to the ComputerConnect Your Parallel Device, If Applicable Reassemble your computer24Installing the Adapter Signal NameIn/Out Pin25 Data corruption or loss,or damageto hardware Turn Power On to Peripherals, Then to the ComputerHP-UX Systems Set Up the Operating SystemMPE XL Systems Verify Operation ServiceInformation Service Information Flgure 2-1. Location of Board Component FRUs Exchange AssemblyExchange adapter card assembly Field Replaceable UnitsOther FRUs Board ComponentsShould be performed by authorized servicepersonnel only Troubleshooting ToolsSelf-lestFailure Self-Test Failure LED Boot failure occursOperation. Refer to your systemreference manuals Troubleshooting Checklist Scsipba and Centpba DiagnosticsDoes any device require a special SCSIterminator? Removal/Replacement Instructions For card removal, follow the procedures below Removal/Replacement of the CardService Information 2-l Removal/Replacement of Card ComponentsMinimize touching the connector pins Also be determined from the,scsipbadiagnosticType and rating Damagewasextensive, you may need a new componentFlgure 2-3. Replacing the Termpwr Fuse Service Information DiagnosticCan continue to operate normally Reshipment Guidelines General Technical Specifications1green IPhysical IEnvironmental IElectrical +5 VdcGlossary ConfigurationAmerican National StandardsInstitute Backplane FRU HP-PB Host adapter SeeadapterParallel port Complies with the Scsi specification X3.131 GlossaryPrecision Bus See HP-PB SCSI-2 Termination Index t IndexCard version...14 CableHP Precision Bus SeeHP-PB HP-PB Identification information...l-4 installingPart number...2-3 Field replaceable units se-eFRUS FRUs...2-3Loopback hood...2-4 Physical specifications...2-16 IndexSelf-test failure LED...2-6 shut down PowerProduct contents...13 Resistor pack...&10Ylrlbo~ Storing adapter cards...l-3 switchDuring installation/removal..J-6,1-19,2-10 Troubleshooting..2-85960-3126 El091