HP 28642A User Manual

Download

HP 28642A HP-PB SCSI HP 28655A HP-PB SCSI/ Parallel

HP HP

5960-3126 El091

@Hewlett-Packard Company, 1991. AI1 rights rcservcd,

Hewlett-hckard Company makes M wsmmty of any kind with regard to this material, btcb~dittg. but not Ihttited lo. the implied warranties of merchantability and iitncsr for a panicular purpose. Hewlett-Packard shall My be liable for ertccs contained he-rein or for incidental or consequential damages iu connection with the fumishing, performan~. or use of thismamiai.

This document cowins proprietary infommticm, which is protected by copyright. No pan of this document may be photocopied, reproduced, or translated into another language witbout the prior written consent of Hewlett-PacM. inform&m umbined in thii document is subject to change without notice.

The

Print History

Edition 1, October 1991

Safety Considerations

The product and related documentadou must he reviewed for familiarization with safety markings and irtt~ctions before installation and operation.

Safety Symbois

WARNING CAUTION

lnstntclion manual symbol. If the product is marked with tbis symbol. refer to the produc1 mamtals to protect the product againsl damage.

A WARNING denotes a hazard that can cause petsonal injury. A CAUTION denotes a hazard that can damage equipment. Do not proceed beyond a WARNING or CAUTION notice until you have understood the

hazardous conditions and have taken appropriate steps.

Grounding:

Tbe computer in which thii product is installed is a safety class I product and has a protective earthing

terminal. There must be an uninterruptible safety earth ground from the main power source to Ihe product’s input wiring terminals, power cord, or supplied power cord set. Whenever il is likely that the Protection has been impaired, dionuect the power cord until the ground has been

servkblg:

Any servicing, adjustment. maintenance. or repair must be performed only by autborizcd service-trained

-1.

Hewlett-Packard Company Roseville Networks Division, Roseville, CA 95678

restored.

Installation and S&vice

HP28642A HP-PB SCSI HP 28655A HP-PB SCSI/Parallel

HP 28642A and HP 28655A at a Glance

Extractor lever.

A-

B - Retaining (captive) screw. C - Self-Test Fail LED (yellow), normally off.

D - SCSI port, SO-pin high-density connector, single-ended signals. E - SCSI bus termination resistors, single in-line packages (SIPS). F- PROM, socket location U52. G - HP-PB backplane connector. H - Switch pack of four switches, SW1 I- Termination power fuse.

Term Power LED (green), normally on.

JK - Parallel port, not supported on MPE XL systems.

Product Description The HP 2S642A/HP 2S655A HP-PB adapter is a computer interface card for use in

HewIett-Packard computers that use the HP-PB (HP Precision Bus) backplane. The HP 2S642A product is for MPE XL systems. The HP 2S655A product is for HP-UX systems.

The adapter card provides a SCSI port (Small Computer System Interface) for connecting up to seven SCSI peripherals. In addition, the adapter card provides a standard HP parallel port for connecting an output-only device. The parallel port is not supported for use on MPE XL systems.

Hardware Supplied HP 28642A’

SCSI/parallel adapter card (2865540001) m SCSI bus external terminator (1252.3920) m SCSI port cable, 1 meter (5062-3383)

This Znstallation and Service Manual (5960-3126)

*Note: The parallel port is not supported for use on MPE XL systems.

HP28655A

SCWparaIlel adapter card (2865560001)

n SCSI bus external terminator (1252-3920) m SCSI port cable, 1 meter (5062-3383) m Parallel port cable, 2 meter (51804010) m This Znstallation and Service Manual (5960-3126)

Tools and Accessories Not Supplied

Screwdriver, Torx T-10 or 3/164nch flat blade

HP-PB slot divider (5062-3336)

Loopback hood, single-ended SCSI signals (5061-6565)

In This Book

This manual contains installation and service information for the:

HP 28642A HP-PB SCSI adapter for MPE XL systems, and

HP 28655A HP-PI.3 SCSI/Parallel adapter for HP-UX systems.

Thii manual is organized as follows: Chapter 1 provides installation instructions. It describes, in detail, the steps that you

should follow to install this product.

Chapter 2 contains service information as well as technical specifications. If you have problems with your card, refer to this chapter for test procedures or general service

information.

This manual is limited to installation of the adapter card only. We assume that you have your computer system and periphera1 manuals to complete the installation.

Chapter 1. Installing the HP 2s642Al28655A Adapter

1, Prepare to Install the Adapter Card

Observe Antistatic Precautions Verify Product Contents Record Adapter Card Identification Information Gather Tools and Accessories Needed

Slot Divider SCSI Cables

2. Shut Down the System and Switch Off the Computer

3. Check the Card’s Hardware Configuration Set the Desired Parity-Checking Capability

SettheSCSIBusAddress

Verify that Resistor Packs are Properly Installed

4. Install and Connect the Card

Select an Appropriate Slot Record the Slot Number Prepare the Slot For Use

Removing Slot Covers Removing Filler Cards

Installing a Slot Divider Insert the Card into the Slot Attach the Card Cables

5. Connect Your Peripheral Device(s) Connect Your Single-Ended SCSI Device(s)

Terminate the SCSI Bus

A SCSI Cable Length Example Connect Your Parallel Device, if Applicable Reassemble Your Computer

6. Turn Power On to Peripherals, Then to the Computer

7. Set Up the Operating System HP-UXSystems MPE XL Systems

8. VerifyOperation

...................................

..............................

..................................

.................................

...................................

.........................

..........................

.............................

.....................

...................

.............................

................

.............................

............................

.............................

..............................

.............................

............................

...........................

.........................

..................

........................

..................

...........................

............................

...............

..............

1-3 l-3 l-3 14 14 l-5 l-5

l-6 l-7

l-8 l-9

l-10 l-11

l-11 l-13 1-14 1-14 l-15 l-15 1-17 1-18

l-19 1-19 l-20 1-21 1-23

l-23 l-26 l-27

1-27 1-27

l-28

Chapter 2. Service Information

Field Replaceable Units

Exchange Assembly Board Components Other FRUs

Troubleshooting Tools

Self-Test Failure LED TERMPWR LED SCSIPBA and CENTPBA Diagnostics Troubleshooting Checklist

Removal/Replacement Instructions

Removal/Replacement of the Card Removal/Replacement of Card Components

PROM and Termination SIPS

Termination Power Fuse Reshipment Guidelines Technical Specifications

Glossary Index

....................................

.................................

................................

..................................

...............................

.................................

.....................

............................

..........................

.......................

........................

............................

.................................

..................

2-3 2-3

24 24

2-5 2-6

2-6 2-7 2-7

2-9 2-10 2-11

2-11 2-12

2-14 2-15

Installing the HP 28642A/28655A Adapter

lnstalllng the HP 28642A/28655A Adapter

This chapter contains installation instructions for the HP 28642A/28655A HP-PB SCSI/Parallel adapter card. Figure l-l illustrates a

The instructions are organized into the eight primary steps listed below. Each step is described in detail in this chapter. If the adapter card has already been installed and configured at the factory, you may proceed directly to step 5.

1. Prepare to Install the Adapter Card.

2. Shut Down the System and Switch Off the Computer.

3. Check the Card’s Hardware Configuration.

4. Install and Connect the Card.

5. Connect Your Peripheral Device(s).

6. Turn Power On to Peripherals, Then to the Computer.

7. Set Up the Operating System.

8. Verify Operation.

HP PA-RISC Computer

with HP-PB Backpla

typical

installation,

SCSI Devices (such as disk drives)

Figure l-l. Typical Use of the SCSI/Parallel Adapter

1-2 Installing the Adapter

is not supported witi MPE XL)

1. Prepare to Install the Adapter Card

Before installing the SCSI/parallel adapter card, perform the following:

1. Observe antistatic precautions.

2. Verify product contents.

3. Record adapter card identification information.

4. Gather tools and accessories needed.

Observe Antlstatic Precautions

Thii product contains electronic components that can be damaged by static electricity. To

avoid damage, follow these guidelines:

Store printed circuit assemblies in their conductive plastic bags until you are ready

to install them. m If possible, work in a static-free area. m Handle printed circuit assemblies only by the edges. Do not touch electronic

components or electrical traces. We strongly recommend that you use a

grounding wrist strap that is connected to the metallic chassis of the host

computer. If you do not have a wrist strap, touch the chassis before handling

assemblies and frequently thereafter to equalize. any static charge.

Verify Product Contents

Unpack and identify a11 items supplied with the product:

SCSI/parallel adapter card

External SCSI terminator

SCSI port cable, 1 meter

m Parallel port cable, 2 meter’

Znsfaliution and Service manual

Parallel port cable is not supplied with HP XXX. The parallel port is not

supported on MPE XL systems.

28655-60001

1252-3920

5062-3383

5180-0010

5960-3126

Installing the Adapter l-3

Record Adapter Card Identification Information

Should your card require service, its part number and date code may be needed by HP service personnel. This information is provided on a labeled sticker on the card. An example of a labeled sticker is illustrated in figure 1-2.

Figure 1-2. Identification Sticker Example

The number in the upper left (28655-6xx~cx) is the adapter card assembly part number.

The 5-digit alphanumeric string (A-m) is the card version and date code.

m Other numbers (such as YYYY) are for factory use only.

Record the card’s part number and date code for future reference. Once the card is installed, this information will be more diflicult to obtain.

Gather Tools and Accessories Needed

Check the hardware installation manuals for your particular computer model for any special tools or accessories needed to access the I/O card cage. The following items may be needed for card installation:

D Screwdriver, Torx T-10 or 3/164nch flat blade.

Slot divider (5062-3336), described below.

m SCSI cables, described below.

1-4 Installing the Adapter

Note

Slot Divider

Since this adapter card is a “single-high” card, it requires a single-high slot (Eurocard standard slot size 3U). A double-high (6U) slot can be converted into two single-high slots

using a slot divider. Slot divider installation is described later in this chapter.

This product does not include a slot divider. Slot dividers are normally preinstalled in the

computer, and it is unlikely that you will need one. However, if one is necessary, you can order it through the near&t HP Sales and Support Office.

SCSI Cables SCSI cables may be purchased separately. Table l-l lists a variety of Hewlett-Packard

cables that can be used with this product, depending on the devices supported with your system. For the most recent information, refer to your system configuration guides, or consult the nearest HP Sales and Support OMice.

You should have all of your system and peripheral device manuals available for refirence. There may be special system or device dependent requirements that are not noted here.

Peripheral to 92222A Peripheral 92222B

92222C

Table l-l. SCSI Cables

Lengths

(meters)

SO-pin, high-density, male connector with thumbscrews (to host adapter), and 50-pin

low-density male connector with bail-lock.

50-pin, low-density, male connectors with bail-lock on both ends.

50-pin, low-density, female-to-male bail-lock connectors.

Description

Installing the Adapter 1-5

2. Shut Down the System and SwZtch Off the Computer

Before installing the card, ensure that the operating system is shut down. Consult

1. your computer system manuals for proper shutdown procedures to avoid corruption or loss of data.

Ensure that power to the host computer is off. Unplug the power cord from the

2. power source.

WARNING

Unless otherwise noted in your computer system manuals, failure to properly shut down the system and remove power may create a personnel hazard, or may result in hardware damage or data corruption,

l-6 Installing the Adapter

3. Check the Card’s Hardware Configuration

Hardware settings for the SCSI/parallel adapter apply to the SCSI port only. There are no hardware settings for the parallel port. Figure 1-3 shows the applicable hardware. To check the card’s hardware, perform the following:

1. Set the desired parity-checking capability.

2. Set the SCSI bus address.

3. Verify that resistor packs are properly installed.

The SCSI/parallel adapter contains switches for setting the parity-checking capability and the SCSI bus address of the card. The default switch settings are “all switches open”, rcsllting in:

parity-checking is enabled, and

= SCSI bus address is 7.

In addition, the card contains resistor packs for terminating one end of the SCSI bus.

Figure I-3. Switches and Termination Resistors

Installing the Adapter 1-7

Set the Desired Parity-Checking CapabUity

AU devices on a SCSI bus must have the same parity-checking capability. If any device on the SCSI bus does not generate parity, then all devices on the bus, including the adapter, must not check parity. (Although parity-checking is selectable, the adapter always generates parity.)

Note

If there is a SCSI device that cannot match the parity-checking capability of other devices on the bus, you must add a separate SCSI bus for that device. An additional SCSI adapter card may be needed for this purpose.

As shown in figure 1-4, the factory setting is “parity-checking enabled”, that is, with switch 4 in the “open” position. The “closed” position will deactivate parity-checking.

Parity-Checking, Default = Enabled

[Switch 4 is Open)

SCSI Bus Address, Default = 7 (Switches 3,2,1, is Open)

Figure l-4. Default Switch Settings

l-8 Installing the Adapter

Set the SCSI Bus Address

There may be up to eight devices (which includes the SCSI adapter) connected to a SCSI bus. Each device must have a unique address, from 0 to 7. The bus address determines the

device’s priority on the bus. Seven is the highest priority and zero is the lowest priority.

Switches 3,2, and 1 are used to set the adapter’s address on the SCSI bus. In binary, switch 3 represents the most significant digit. When shipped from the factory, the address is set to 7 (switches 3,2, and 1 are each set to “l”, that is, in the “open” position) as shown in figure

l-4.

For most applications, “7” is the best choice for the adapter’s SCSI bus address. Table l-2 shows switch positions for other possible addresses. Be sure all devices on the bus have a

different address.

Table 1-2. SCSI Address Switch PositIons

Switch SCSI Bus 1

2 1

Address

0 0 0 0

1 1 1 1

0 = “closed”

1 = “open”

0 0 0 1

1 0 1 1

0 0 0 1

1 0 1 1 7 (Defauh)

0 1 2 3

4 5 6

Installing the Adapter l-9

Verify that Resistor Packs are Properly Installed

A SCSI bus has two ends between which SCSL devices are attached. Each end of a SCSI bus must be terminated with a resiitor network, or “terminator”. The adapter card contains two resistor packs mounted in sockets on the card. These resistor packs act as a terminator for one end of the SCSI bus.

Note

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

The SCSI port is supported for use only on the end of a SCSI bus. The

two resistor packs must be installed.

Termination Resistors,

Figure l-5. Proper Resistor Pack Orientation

l-10 installing the Adapter

4. Install and Connect the Card

The HP-PB cardcage accommodates two sixes of cards: single-high (Eurocard standard 3U) or double-high (6U). The SCSI/parallel adapter is a single-high (3U) card and

requires a single-high slot. HP computers are normally shipped with single-high slots.

However, this section contains information on converting a double-high slot to two

single-high slots.

To install and connect the SCWparallel adapter into the host computer, read the steps described below:

1. Select an appropriate slot.

2. Record the slot number.

3. Prepare the slot for use.

4. Insert the card into the slot.

5. Attach the card cables.

Select an Appropriate Slot

Before you install the SCSI/parallel adapter into the host computer, you should understand the following information for your particular computer model:

How to gain access to your computer’s l/O card slots.

You may need to remove various covers or panels to expose the slots. computer’s I/O slots are not readily accessible, refer to your computer installation or hardware reference manuals to gain access.

m Proper orientation of an If0 card into the cardcage.

The HP-PB connectors are designed to prevent improper connections.

installing the Adapter l-l 1

If your

m Authorized or recommended slots for the SCSI/parallel adapter.

- The SCSI/parallel adapter is a standard HP-PB card. Typically, it can be installed in any stamiard HP-PB single-high (3U) slot.

However, some systems may contain special slots that do not support this card, or may contain particular slots that are reserved for thii card.

- The SCSI/parallel adapter complies with HP-PB specifications for a standard-power card. This is indicated on the card by an open circle symbol labeled on the card’s faceplate (as illustrated in figure l-6).

Check your computer installation or hardware configuration manuals for SCSI/parallel adapter slot requirements.

HP-Pa Standard Power Symbol

Figure l-6. Standard Power Symbol Location

special

l-12 Installing the Adapter

Computer hardware limitations for l/O cards, if any.

The HP-UX and MPE XL operating systems support the use of this card. However, the particular computer model into which this card is installed may require special configuration rules due to power supply or slot limitations. This may affect the number or combination of interface cards authorized for use. To

prevent card or system damage, be sure to consult your system installation and configuration manuals for authorized I/O card cage configurations.

System performance implications, if any.

All HP-PB I/O cards are guaranteed to be able to acquire the HP-PB backplane

for communication with the central processing unit (CPU) or memory. However, the I/O card in the highest numbered slot may acquire the bus more frequently. (That is, if all cards arbitrate for the bus continuously, the card in the highest slot will acquire it about 50% of the time.)

The SCSI/parallel adapter is a high-performance card. In general, if your applications require high performance through this card and you are not concerned about the performance of other I/O cards in your system, then select the highest numbered slot. Otherwise, any other allowed slot would be suitable. You should check your system installation or configuration manuals for any recommended configurations.

Record the Slot Number

The HP-PB slot number is used to calculate the card’s hardware address during system configuration. The slot number is labled on the computer and may be an even or odd digit.

Hexadecimal notation may be used. If the slot number will be difficult to obtain once the computer is reassembled, record the number now.

Installing the Adapter 1-13

Prepare the Slot For Use

To prepare a slot, you must first remove the metal slot cover. Then, if a plastic frl!er card is installed in the slot, remove it. when slots are not in use.) If a slot divider is not installed, you must install one. Figure l-7 shows the applicable hardware.

Removing Slot Covers Using a Torx T-10 or 3/164nch flat-blade screwdriver, unscrew the slot cover retaining

screws and remove the slot cover for the selected slot.

Filler Card

(Retain slot covers and filler cards- they should be installed

Slot Divider

Figure 1-7. Slot Cover, Filler Card, and Slot Divider

t-14 Installing the Adapter

Removing Filler Cards A plastic “filIer” card is normally installed when a slot is not in use. In some systems, the

filler card helps to channel airflow through the cardcage. In these systems, you must remove the filler card before you can install the SCSI/parallel adapter.

Installing a Slot Divider A slot divider is an assembly that converts a double-high (6U) slot into two single-high (3U)

slots. It provides supporting card guides for single-high adapters and filler cards. It also

provides retaining screw holes for securing slot covers and adapters.

Slot dividers are normally pre-installed when shipped from the factory. If a slot divider is already installed, skip the steps below.

If a slot divider is not installed, you must install one

as follows:

1. Insert the slot divider carefully into the empty double-high (6U) slot.

2. Align the slot divider’s alignment pin with the hole in the locator bracket on the backplane. See figure l-8.

Locator

Bracket

ignment Hole

Figure 1-8. Aligning Slot Divider For Installation

Installing the Adapter l-15

3. Press the slot divider until its retention clips clamp onto the locator bracket as illustrated in figure 1-9.

Figure 1-9. Slot Divider Mated With Backplane Bracket

l-16 Installing the Adapter

Insert the Card into the Slot

To install the adapter into its slot, proceed as follows:

Inspect the %-pin connector at the back of the slot on the backplane. Ensure that there are no bent pins.

2. With both hands, grasp the card by its edges or faceplate. Do not touch electronic components or electrical traces.

3. Insert the card into the slot. Be sure the card is properly aligned with the card guides on the slot divider and cardcage wall.

4. Ensure that the extractor levers are flush against the faceplate (in other words, not

protruding out).

5. Slide the card ail the way into the cardcage until it reaches the backplane

connector. Be sure that card components are not obstructed in any way.

6. Press firmly on the extractor levers (or on the faceplate) until you feel the card

slide fully into place.

CAUTION

7. Once the card is fully seated in its slot, use a screwdriver to engage and tighten the two retaining screws on the faceplate. These screws secure the card to the cardcage.

The use of excessive pressure may damage the card and the backplane. If you feel resistance, check for obstructions, and reverify that the connector pins are straight. Ensure that the card is correctly engaged in the card guides. If the problem persists, get help.

Installing the Adapter 1-17

Attach the Card Cables

Figure l-10 shows a typical installation with both the SCSI port and parallel port cables attached (the use of the parallel port is not supported for MPE XL systems).

CAUTION

Note

Parallel Port Cable

auupported on

MPE XL systems)

Do not connect serial cables (for example, RS-232 cables) to the parallel port. Connecting serial cables can damage the SCSI/parallel adapter.

SCSI cables with high density squeeze-latch or thumbscrew connectors can be attached to the SCSI port. However, cables with thumbscrew connectors are recommended for improved reliability. The SCSI cable supplied with this product provides a thumbscrew connector.

\ Thumbscrews

SCSI Port Cable

(not

Figure l-10. Cable Connections to SCSI and Parallel Ports

1-18 Installing the Adapter

Connect Your Peripheral Device(s)

You can connect SCSI devices (single-ended devices only) to the SCSI port, and a parallel communication device to the parallel port. (The parallel port is not supported for use on

MPE XL systems.) The following steps are described below:

1. Connect your single-ended SCSI devices.

2. Terminate the SCSI bus.

3. Connect your parallel device (ii applicable).

4. Reassemble your computer.

Connect Your Single-Ended SCSI Device(s)

When connecting SCSI devices, follow these guidelines:

Verily that the host system is shut down. There should be no data transfer activity on the SCSI bus.

m Verify that power is off to the peripheral device before connecting it to the SCSI

bus.

Verify that your peripheral devices use single-ended SCSI bus signals only.

8 Check whether your device contains internal SCSI bus terminators, or requires

special terminators. If so, refer to your device manuals for instructions on how to prevent excessive or improper SCSI bus termination.

CAUTION

Only the two ends of a SCSI bus should be terminated. Excessive or improper termination may overload the SCSI port’s termination power (“TERMPWR”) circuitry. This may result in blowing the TERMPWR fuse on the adapter, or damaging transceivers on any attached device (including the adapter). Refer to device manuals to ensure they operate properly on the SCSI bus.

Installing the Adapter l-19

Set switches or jumpers on your device(s) as appropriate. Be sure each SCSI

device has a unique SCSI address. For optimum noise immunity, any device that supplies termination power should

be enabled to do so. If at least two devices supply termination power, Locate them at each end of the SCSI bus.

Connect the device end of the SCSI port cable (50-pin, low-density SCSI connector) to the first SCSI device. If applicable, connect subsequent devices.

The connection method is often called “daisy-chaining”. Refer to your device

manuals for proper connection to a SCSI bus. Use active SCSI terminators. Use HP-supplied SCSI cables. Minimize the SCSI bus length. However, do not use device-to-device cables that

are less than 0.5 meter. Do not exceed the maximum single-ended SCSI bus length of 6 meters, which

includes the SCSI port cable a& any internal device cabling. (The SCSI/parallel adapter has an internal SCSI cable length of 0.1 meter.)

Do not exceed the maximum number of system.

devices

supported for your particular

Terminate the SCSI Bus

Unless the SCSI bus is properly terminated, the bus will not operate reliably. Terminators provide matching impedance and bias the bus signat lines.

This product includes an external SCSI bus terminator assembly, part number 1252-3920, to terminate the peripheral end of the SCSI bus. The terminator assembly contains a SO-pin, low density, male connector. Adapting connectors can be used to accommodate other types of SCSI connectors. Consult HP for availability,

As illustrated in figure l-11, install the terminator on the end of the SCSI bus (opposite the SCSI/parallel adapter).

l-20 lndalling the Adapter

CAUTION

Only the two ends of a SCSI bus should be terminated. Excessive or improper termination may overload the termination power circuitry on the SCSI port. This may result in blowing the TERMPWR fuse on the SCSI/parallel adapter, or may damage transceivers on any attached device (including the adapter). Refer to device manuals for proper device operation on the SCSI bus.

Terminator Resist0

Install External Termlnator

Figure l-l 1. Install External Terminator on Last Device

Installing the Adapter 1-21

A SCSI Cable Length Example Table l-3 and figure 1-12 demonstrate how to calculate SCSI bus cable lengths for a typical

installation. The SCSI 0.5 m cable (HP 92222A) used in the example is available through

your HP Sales and Support Office. Other lengths are also available.

Table 1-3. Example of SCSl Cable Length Calculation

Cable to next device

HP Device #4

l-22 Installing the Adapter

HPDevice13 ,

HP Device #2

Figure 1-12. SCSI Bus Example

Connect Your Parallel Device, If Applicable

Output-only parallel devices, such as common printers, can be connected to the parallel port. Figure l-13 and table l-4 show the signals definitions of the parallel port connector.

Note

The parallel port cable contains a 25pin connector for connecting to the parallel port, and

a Spin connector for the peripheral device. Figure 1-14 shows the parallel port cable and

wiring diagram.

CAUTION

For MPE XL systems, do not use the parallel port. The parallel port is not supported for use on MPE XL systems. Proceed directly to step 6, “Turn Power On to Peripherals, Then to the Computer.”

For reliable operation, do not use a parallel port cable that is longer than two meters.

Reassemble your computer

Unless there are other adapter cards to install, reassemble your computer. Be sure to reinstall protective panels or covers.

Installing the Adapter 1-23

Pin 1

Pin 14

Pin Number

1 nStrobe

2 Data1 3 4 5 6

7 8 9

10 11 12 13

Pin 13

Figure 1-13. Parallel Port Pins

Table 1-4. Signal Pin Assignments

Signal Name

Data2

Data3 Data4 Data5

Data6

Data7

Data8

nAck

Busy

PError

Select

Pin 25

In/Out

Pin Number Signal Name

out 14 nAutoFd out 15 out 16

nFault In

nReset out out 17 nSelectIn out 18 out 19 out 20 out 21 out 22

Ground Ground Ground Ground

Ground In 23 no connect In 24 In 25

Ground

Ground In

In/Out

out

l-24

Installing the Adapter

Fin 1

Pin25

II :: :: :: :: 0 .

Pin 36

Pin 1

25Pin Connector, Host End

B-Pin Connector, Peripheral End

Figure 1-14. Parallel Cable Wiring Diagram

Installing the Adapter

l-25

Turn Power On to Peripherals, Then to the Computer

Before turning power on, follow these steps:

1. Verify that a11 cables are connected and securely fastened.

2. Turn power on to your peripheral devices before your computer. Refer to your peripheral and computer installation manuals for information on

turning power on. In general, plug your power cords first into the load (your peripheral or computer), then into the power source (such as the electrical wall outlet). Then turn on your computer power switches as appropriate.

When the computer’s power is switched on, power is supplied to the SCSI/parallel adapter through the HP-PB backplane. For operation of the light emitting diodes (LEDs) on the card, refer to chapter 3, Service btfonnation.

CAUTION

1-26 Installing the Adapter

After power is switched on, termination power (“TERMPWR”) is

supplied to the SCSI bus. Do not switch power on or off any device connected to an active SCSI bus. Similarly, devices should not be added to, or removed from, an active SCSI bus. Failure to comply may result in data corruption or loss, or damage to hardware.

7. Set Up the Operating System

Before you can use your devices, the SCSI/parallel adapter card and peripheral devices must be configured into the operating system. Depending on your system, this may or may not be performed automatically during the boot process. Refer to your system administration manuals for current procedures.

HP-UX Systems

On HP-UX systems, refer to your HP-LX Installing Pefipherals Guide, B2437-90005, and HP-UXSystem Administration Tasks Guide, B2437-90006.

If you manually generate a new kernel, you may need the names of the software drivers for the SCSI/parallel adapter card. The driver names are:

SCSI module: scsil

Parallel module: cent0

MPE XL Systems

On MPE XL systems, refer to your System StartlIp, Configuration, and Shutdown Reference

Manual, 32650-90042. On MPE XL systems, you should not need the name of the SCSI

module driver.

Installing the Adapter 1-27

8. Verify Operation

To verify card operation, observe the light indicators:

The yellow self-test LED should be off.

The green termination power LED should be on.

In addition, you can check for proper operation of each port by running one of your

application programs that writes to or reads from your peripheral device(s). If proper operation cannot be verified, refer to chapter 2, Service Information, and to your system troubleshooting manuals. If operation continues to fail, call your Hewlett-Packard Sales and Support Office.

1-28 Installing the Adapter

Service Information

This chapter provides the following service and reference information:

m Field Replaceable Units 8 Troubleshooting Tools H Removal/Replacement Instructions

Reshipment Guidelines

Technical Specifications

2-2 Service Information

Field Replaceable Units

Field replaceable units (F’FWs) are assemblies or components that are authorized for field

replacement. Field replacement of faulty units must be performed by authorized service

personnel. See figure 2-l for FRUs associated with the adapter card.

TERMPWR Fuse

Flgure 2-1. Location of Board Component FRUs

Exchange Assembly

The adapter card assembly may be replaced under the HP board exchange program. Assembly part numbers are listed below:

New adapter card assembly: Exchange adapter card assembly:

2%655-6ooOl 28655-69001

Service Information 2-3

Board Components

The foIIowing board components are available for replacement (see figure 2-l for location):

PROM (location U52): 28655-81001 Fuse, termination power: 2110-0517 Onboard SCSI terminator,

(single in-line packages, SIPS): 1810-0676 (two installed)

Other FRUs

Other PRUs associated with this product include the following:

SCSI card cable, 1 meter: External SCSI bus terminator: Loopback hood: 5061-6565 (single-ended) Parallel cable,* 2 meters:

* Not applicable for the HP 28642A product on MPE XL systems. MPE XL systems do not support the use of the parallel port.

5062-3383

12523920 (active, single-ended)

51804010

(same as HP 92284A)

2-4 Service Information

Troubleshooting Tools

Troubleshooting tools are used to identify faulty FRUs. For this product, the following

tools

are described below

B Self-Test failure LED (see figure 2-2)

TERMPWR LED (see figure 2-2) 8 scsipba and centpba diagnostics H Troubleshooting checklist

CAUTION

Self-lest

LED (vellow)

Failure

In some systems, the light emitting diodes (LEDs) on the card may not be visible without exposing the I/O cardcage. Unless otherwise permitted, operating the computer system with the I/O cardcage exposed should be performed by authorized service personnel only.

Figure 2-2. Location of LEDs

Service Information 2-5

Self-Test Failure LED

The Self-Test Failure LED is yellow and will indicate card test failures when used by fhe

host system. Card self-test code contained in PROM on the card is uploaded to the host

and run under host control.

Note

When card self-test is executed, the LED will tight and subsequently turn off if self-test passes. When used by the system, the card self-test has failed if:

n the LED never turns on, or

the LED turns on and remains on.

If card self-test fails, check the TERMPWR fuse. Otherwise, replace the card.

The use of the card’s self-test code is system dependent. In some systems, for example, the self-test must be invoked by the operator. In other systems, it may be run automatically by the system, but only if a boot failure occurs.

In addition, the use of the Self-Test Failure LED is system dependent. In some cases, the LED will operate as described here. In other cases, system messages will be displayed on the system console in place of LED operation. Refer to your system reference manuals.

TERMPWR LED

The termination power (TERMPWR) LED is green and indicates that the card is supplying termination power to the SCSI bus. During proper operation, this LED should

be on.

If this LED is off, there may be a problem with the TERMPWR circuitry. Possible faults include a blown TERMPWR fuse, a faulty card, or a faulty cable connection. Instructions on how to replace the TERMPWR fuse is described later in this chapter.

2-6 Service Information

SCSIPBA and CENTPBA Diagnostics

Standard diagnostics, scsipba and centpba, are available for use by authorized service personnel. For more information on these diagnostics, refer to the system troubleshooting and diagnostic manuals for your particular system.

Troubleshooting Checklist

Table 2-l provides a troubleshooting checklist that can be used to help identify faults.

Table 2-l. Troubleshooting Checklist

Check

list item

Are all connectors (SCSI and parallel) properly and securely fastened?

Are all the external devices Run their self-tests and verify their settings. operating correctly?

Does each device on the SCSI bus have a unique address (0 through 7)?

Are SCSI bus length and cable requirements met?

Are you using HP cables? Do all devices on the SCSI If any device on the SCSI bus does not generate parity, no

bus have the same parity-checking capability?

Marginal connections can cause improper operation. Ensure that the adapter and retaining screws are completely engaged. Check all cable connections.

Usually, there will be a set of switches on the device. Conflicting addresses may cause intermittent or complete failures in transmission.

Minimize the SCSI bus length. Do not exceed 6 meters, which includes cable lengths inside each peripheral (the SCSI/parallel adapter’s internal SCSI bus length is 0.1

meter). However, do not use device-to-device cables that are shorter than 0.5 meters.

HP cables are wired to minimize noise.

device on that bus may check for it A mismatch causes

non-recoverable hardware errors because parity is both

expected and missing. (Note: Only some very early SCSI

devices do not generate parity.)

Explanation

Service Information 2-f

Table 2-I. Troubleshooting Checklist (continued)

Are the SCSI bus terminators correctly installed?

Does any device require a special SCSI terminator?

Does any peripheral device

have an internal SCSI terminator?

Are all devices that can

supply termination power configured to do so?

Both ends of the SCSI bus require termination. The terminator on the host adapter is installed at the factory. An external terminator is supplied for terminating the last device on the bus.

Some external devices may have peculiar termination requirements. The device manual should explain any special termination requirements and how to avoid problems.

Excessive termination may cause damage to the transceivers of all the devices on the bus, including the adapter card, or may cause unreliable operation. Check the device manuals to determine whether they have internal terminators and how to avoid overloading the bus.

For optimum noise immunity, we recommend that devices be configured to supply TERMPWR when possible. If at least two devices supply TERMPWR, locate them at each end of the SCSI bus, Additional devices that supply TERMPWR can be evenly distributed along the bus.

2-8 Service Information

Removal/Replacement Instructions

This section describes removal and replacement instructions for the following items:

The SCSI/parallel adapter

SCSI/parallel adapter components

WARNING

CAUTION

Unless otherwise noted in your system manuals, removal of the interface card should only be done with power removed from the host computer. Failure to comply may result in an electrical shock hazard, or in damage to the hardware.

The card contains electronic components that can be damaged by static electricity. To avoid damage, follow these guidelines:

Store printed circuit assemblies in their conductive plastic bags. If possible, work in a static-free area. Handle printed circuit assemblies only by the edges. Do not

touch electronic components or electrical traces. We strongly recommend that you use a grounding wrist strap that is connected to the metallic chassis of the host computer. If you do not have a wrist strap, touch the chassis before handling assemblies and frequently thereafter to equalize any static charge.

Service Information 2-9

Removal/Replacement of the Card

For card removal, follow the procedures below:

1. Before removing the card, ensure that the operating system is shut down and that power to the host computer is off. Consult your computer system manuals for proper shutdown procedures to avoid corruption or loss of data.

2. Access the f/O cardcage according to instructions in your system manuals.

3. Disconnect the cables from the card.

4. Unscrew the two retaining screws that secure the card to the cardcage.

5. Simultaneously lift both extractor levers on the card. This will disconnect the card from the HP-PB backplane connectors.

6. Slide the card out of its slot.

To install a replacement card, follow the procedures described in chapter 1.

2-10 Service Information

Removal/Replacement of Card Components

Replaceable card components are socketed to facilitate their removal and replacement. PROM and Termlnation SIPS

CAUTION

It may be necessary to remove Programmable Read Only Memory (PROM) devices and termination resistors for the following reasons:

The components may be faulty.

H PROMS must be replaced when upgrading to newer versions.

Note

To remove these components, proceed as follows:

1. Remove the card from the host computer as described earlier in thii chapter.

Observe antistatic precautions when handling these components. When removed from the board, these components should be placed in antistatic containers (such as conductive box 15404929 with antistatic foam insert

92112794). Minimize touching the connector pins.

The PROM firmware version is displayed during system boot and can also be determined from the,scsipba diagnostic.

2. Use a “chip extractor” or similar tool to gently pry and remove each component from its socket.

CAUTION

Excessive prying and pressure can damage the component or its socket. Use care during removal.

Service Information 2-l 1

To install replacement components, proceed as follows:

1. Identify the proper socket location for the replacement component.

2. Note the half-circle notch or identification mark located on one end of the component. When installed, the component must be oriented so that its notch or mark is in the same direction as a similar notch or mark on the socket.

3. Ensure that the component’s contact pins are aligned with the socket’s receptacles. You may need to adjust the pins (bow them inward or outward) for proper alignment.

4. Gently press the component into place to properly seat the pins.

CAUTION

Termination Power Fuse

WARNING

If the termination power (TERMPWR) fuse blows, the SCSI port will no longer supply termination power to the SCSI bus, and the green TERMPWR LED will turn off.

If pressure is not uniformly applied, the pins on one side or the other may buckle and collapse without making proper electrical contact. If this happens, remove the component, straighten the pins, and try again. If damage was extensive, you may need a new component.

For continued protection, replace only with a fuse of the same

type and rating.

2-12 Service Information

Note

Before replacing the TERMPWR fuse, identify the reason for the failure. Check for

sonrces of short circuits on the SCSI bus cables and connectors. of contact pins on the SCSI bus cables. peripheral devices when connecting SCSI bus cables to prevent inadvertent shorting.

To remove and replace the fuse, proceed as follows:

1. Remove the card from the host computer as described previously in this chapter. 2 As shown in figure 2-3, pull the fuse out of its socket. It is usually a good idea to

verify that the fuse is open by using a continuity tester.

3. To install the replacement fuse, carefully align the two contact pins with the socket holes. Then simply press the fuse in. The fuse has no polarity, so the pins can go into either socket hole.

An open fuse condition can be also be determined from the scsipba diagnostic. If another device on the SCSI bus provides termination power, the bus can continue to operate normally.

Check for proper mating

Be sure that power is off on the host computer and

Wiggle fuse ollghlly whllr pulling lt

Flgure 2-3. Replacing the TERMPWR Fuse

Service Information 2-13

Reshipment Guidelines

If any item of the product is to be returned to Hewlett-Packard for any reason, contact your HP Safes and Support Office to coordinate the return.

When returning any item, attach a tag that identifies the owner and indicates the reason for shipment. Include the part number of the item and date code if applicable.

Pack the item in the original factory packaging material if available, or a suitable substitute.

Provide antistatic protection to applicable components or assemblies.

2-14 Service Information

Technical Specifications

Table 2-2 SCSI/Parallel Adapter Technical Specifications

Supported I HP 9bOO Series 600/800 HP-PB computers (HP-UX); Systems

Standards

HP 3000 Series 900 HP-PB computers (MPE XL).

General

Transfer Rates

(supported

maximum)

Status

LEDs

;

1 Parallel Asynchronous: 330 Kbyteskecond

Self-test failure

(Yeflow)

Termination power

1 (green) -

Port

Connectors

SCSI Bus

SCSI mode I Initiator only

SCSI: High-density 50-Din female

Parallel: Subminiature D 25pin female

Signal type: Singie-Ended (SE) Data bus width: 8 bits, plus l-bit parity SCSI length on PCA: 0.1 m (SCSI port cable is 1.0 m) Supported SCSI bus length: 6 m maximum (includes

any internal lengths in ail devices)

Under host computer system control

Turns off if TERMPWR fuse

Service information 2-15

Table 2-2. SCSI/Parallel Adapter Technical Specifications (continued)

Voltage

Current (Typical)

Power ~tcal)

Electrical

Physical

Environmental

+5 Vdc

+ 12 Vdc

-12 Vdc Length

Width

Thickness

Weight

Operating

NonOperating

Eiectromagnetic

0.75 A OA OA

3.75 w ow ow

24 cm (9.4 in) 13 cm (5.1 in)

3.1 cm (1.2 in)

0.26 kg (9 oz) Temperature 0°C to 55°C Relative

Humidity Altitude

1595% @ 40°C (noncondensating)

4.6 km (15,000 ft) Temperature -40°C to 70°C Relative 90% @ 65°C

Humidity Altitude

4.6 km (15,000 ft) When operating under authorized

conditions, complies with FI’Z-1046 (VDE Level B), VCCI Class 1, CISPR-22 Class A, and FCC Class A for radiated and conducted emissions.

2-16 Service Information

Glossary

adapter, adapter card

An add-on computer interface card and circuitry that provides the physical connection and data translation between the host computer’s I/O bus and external devices or networks.

ANSI

American National Standards Institute.

backplane

For an I/O bus, the computer’s circuitry and connectors to which adapter cards

connect. The SCSI/parallel adapter card is supported on HP Precision Architecture RISC computers that use the HP-PB backplane. See also, HP-PB.

balanced signal

See differential signal.

bus

The electrical hardware and circuitry for transferring data, address and control signals between hardware modules or devices.

configuration

The arrangement of a computer system or subsystem and its elements to allow proper operation or to implement specific functionality. The term configuration may refer to both hardware and software.

console

The ASCII terminal, or personal computer emulating an ASCII terminal, that is

connected to the host computer for system administration (such as for configuration, monitoring and troubleshooting).

Glossary 1

device

In this manual, refers to the peripheral units that are attached to the SCSI/parallel adapter card.

device adapter

See adapter.

differential signal

Also referred to as “balanced signal”. During electrical transmission and reception,

signals are detemined by the difference between two lines that are both at different

voltages relative to ground. Differential SCSI signals can be used over longer

distances and at higher data rates. A differential SCSI bus is incompatible with a single-ended SCSI bus. Therefore, differential SCSI devices may not be used with the SCSI/parallel adapter card. See also, single-ended signal.

filler card

In some HP-PB computers, a removable plastic plate that is installed in HP-PB I/O slots when the slot is not in use.

FRU

Field Replaceable Unit. The lowest level of hardware supported for field replacement, such as to effect repair.

hardware path

The collection of hardware addresses that uniquely identify hardware elements (such as adapter cards and peripheral devices) to the computer system.

high-density connector

In reference to the adapter card’s SCSI port, a 50-conductor connector consisting of

two rows of 25 contacts with adjacent contacts 1.27 mm (0.05 in) apart. See also,

low-density connector.

host

In this manual, the computer in which the adapter card is installed.

2 Glossary

host adapter

See adapter.

HP-PB

Hewlett-Packard Precision Bus. The data, control, and addressing signal lines for input/output operation on Hewlett-Packard PA-RISC computer systems. the 32-bit system-architected bus through which the CPU, memory, and input/output adapter cards communicate.

HP-PB card

See adapter.

Interface card

See adapter.

Input/Output. The computer subsystem through which data communications with external devices is performed.

IODC

I/O Dependent Code. In PA-RISC computers, IODC is ROM-based firmware on an adapter card that is used for supplying card-dependent information to the host computer. Thii code may contain test routines that check operation of the card.

HP-PB is

LED

Light Emitting Diode, a semiconductor component that emits light when electrically activated to serve as an indicator of operation or state.

loopback

Generally, the process of transmitting known data, and comparing received data with expected results (normally used during troubleshooting, test, or verification procedures).

Glossary 3

loopback hood

A special connector with signal lines configured to allow loopback testing of the

adapter card.

low-density connector

In reference to the SCSI bus, a Xl-conductor connector consisting of two rows of ribbon contacts spaced 2.16 mm (O.OsS in) apart. See also, high-density connector.

parallel port

The Z-pin connector on the SCSI/parallel adapter card for S-bit parallel data

communications with an output only device, such as a printer.

PA-RISC

Hewlett-Packard’s Precision Architecture Reduced Instruction Set Computing computer systems.

A method to check that data was accurately transmitted and received. Usually, the

tranmission logic sums the transmitted data unit and, based on the summation, appends a parity bit. The receiver logic sums the received data unit and, based on its summation, compares the parity bit. The adapter card’s SCSI port can have its parity-checking ability enabled or disabled.

Precision Bus

See HP-PB.

SCSI

Small Computer System Interface, often pronounced “skuq”. Refers to both SCSI-1 and SCSI-2.

SCSI-1

Complies with the SCSI specification X3.131 - 1986.

4 Glossary

SCSI-2

Complies with the SCSI specilication X3.131 - 1990. SCSI-Z provides extensions and further standardization of SCSI-l.

SCSI address

The octal representation of the unique address (0 to 7) assigned to each

device on an

SCSI bus. For bus arbitration, higher addresses have priority over lower addresses. SCSI addresses are typically assigned during installation. The host adapter is typically assigned “7”.

SCSI bus

The collection of unbroken SCSI signal limes that interconnect SCSI devices

SCSI ID

SCSI identification. The bit-significant representation of the SCSI address referring to one of the bus signal lines DB (7 through 0). See also, SCSI address.

self-test

A diagnostic test to check hardware components and circuitry.

slot

divider

An assembly used to convert a double-high (6U) HP-PB I/O slot into two single-high (3I.l) slots. Also referred to as a “two-board adapter”.

sfnglesnded

signal

Also referred to as “unbalanced signal”. During electrical transmission and reception, signals are detemined by the voltage of a single line relative to a common ground. Because of electrical noise caused by ground loops at even short distances

(common mode noise), single-ended SCSI signals are limited to 6 meters maximum and lower data rates. A single-ended SCSI bus is incompatible with a differential SCSI bus. Therefore, use only single-ended SCSI devices with the SCSI/parallel adapter card. See also, differential signal.

Glossary 5

system administrator

The person who manages or controls the configuration and operation of a computer system.

terminator

An assembly that contains a resistive network to terminate the peripheral end of a

SCSI bus. The peripheral end of the SCSI bus may not need a terminator if the last

peripheral device on the bus already contains SCSI termination resistors.

termination

To complete the bus circuitry at each end of a SCSI bus, the electrical lines (at each end only) must be terminated with a resistive network. The HP-PB SCSI/parallel

adapter contains termination resistor packs on the card and must be located at one

end of the SCSI bus. See aIso, terminator.

two-board adapter

See slot divider.

unbalanced signal

See single-ended signal.

6 Glossary

Index

accessories...l-4 adapter

configuration...l-7 connecting...1-11 exchange assembly..23 hardware address...&l3 HP-PB specifications...l-12 HP-UX drivers...l-27 inserting into the computer...l-ll, l-17 part number...13,2-3 removaVreplacement,..2-10 storing...13

version...14 antistatic precautions...l3,2-9 attaching the cable...l-18

bus terminator...%20

HP 28642A User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

In This Book

Table of Contents

lnstalllng the HP 28642A/28655A Adapter

Observe Antlstatic Precautions

Verify Product Contents

Record Adapter Card Identification Information

Gather Tools and Accessories Needed

Set the SCSI Bus Address

Verify that Resistor Packs are Properly Installed

Select an Appropriate Slot

Record the Slot Number

Prepare the Slot For Use

Insert the Card into the Slot

Attach the Card Cables

Connect Your Peripheral Device(s)

Connect Your Single-Ended SCSI Device(s)

Terminate the SCSI Bus

Connect Your Parallel Device, If Applicable

Reassemble your computer

Turn Power On to Peripherals, Then to the Computer

HP-UX Systems

MPE XL Systems

Service Information

Field Replaceable Units

Exchange Assembly

Board Components

Other FRUs

Troubleshooting Tools

Self-Test Failure LED

TERMPWR LED

SCSIPBA and CENTPBA Diagnostics

Troubleshooting Checklist

Removal/Replacement Instructions

Removal/Replacement of the Card

Removal/Replacement of Card Components

Reshipment Guidelines

Technical Specifications

Glossary

Index