HP Model 748 - VME Workstation User manual

Service Handbook
Model 748
HP Part No. A4511-90605
Edition E1199
Special Online Edition
Printed in U.S.A.

ii
Hewlett-Packard Co. 1997, 1999
Printing History
First Printing: February 1997
Latest Printing: November 1999
UNIX is a registered trademark of The Open Group.
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10 9 8 7 6 5 4 3 2 1

Safety and Regulatory Statements
iii
Safety and Regulatory Statements
Safety
See the owner’s guide that came with your system for safety infor-
mation.
Regulatory Statements
Emissions Regulations
Federal Communications Commission (FCC) The Federal
Communications Commission of the U.S. government regulates
the radio frequency energy emanated by computing devices
through published regulations. These regulations specify the limits
of radio frequency emission to protect radio and television recep-
tion. All HP nodes and peripherals have been tested and comply
with these limits. The FCC regulations also require that computing
devices used in the U.S. display the agency’s label and that the
related documentation include the following statement:
NOTE: This equipment has been tested and found to comply with the limits
for a Class A digital device, pursuant to part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against
harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this equipment
in a residential area is likely to cause harmful interference in which
case the user will be required to correct the interference at his own
expense.
Canadian Department of Communications (CDC) This digi-
tal apparatus does not exceed the Class A limits for radio noise
emissions from digital apparatusas set out in theRadio Interference
Requirements of the Canadian Department of Communications.
Emissions Regulations Compliance Any third-party I/O device
installed in HP system(s) must be in accordance with the require-
ments set forth in the preceding Emissions Regulations statements.

Safety and Regulatory Statements
iv
In the event that a third-party noncompliant I/O device is installed,
the customer assumes all responsibility and liability arising there-
from.
Electrostatic Discharge (ESD) Precautions Electrostatic
charges can damage the integrated circuits on printed circuit
boards. To prevent such damage from occurring, observe the fol-
lowing precautions during board unpacking and installation:
• Stand on a static-free mat.
• Wear a static strap to ensure that any accumulated elec-
trostatic charge is discharged from your body to ground.
• Connect all equipment together, including the static-free
mat, static strap, routing nodes, and peripheral units.
• Keepuninstalledprintedcircuit boardsintheirprotective
antistatic bags.
• Handle printed circuit boards by their edges, once you
have removed them from their protective antistatic bags.

Contents
v
1 Product Information
Product Description 1-2
Rack Mounting Configurations 1-5
Memory 1-5
Mass Storage 1-5
System Graphics 1-6
System Board Graphics 1-6
GSC Mezzanine (Expansion Kit) Slot 1-6
PMC Expansion 1-6
Built-In Interfaces 1-6
Model 744 System Board Interfaces 1-7
Hardware Architecture 1-10
Operating Systems 1-10
HP-UX 1-10
Product Identification 1-12
Technical Information 1-13
Support 1-14
Hardware Support 1-15
Field Repair Philosophy 1-15
2 Environmental/Installation/PM
Overview 2-2
Environmental Specifications 2-3
Regulatory Requirements 2-4
Installation 2-5

Contents
vi
Preventive Maintenance 2-6
3 Configuration
Power Budgeting 3-2
Devices 3-2
Determining the Workstation’s Power Needs 3-3
4 Troubleshooting
Introduction to Troubleshooting 4-2
Diagnostic Philosophy 4-2
Analytic Troubleshooting 4-2
Diagnostic Overview 4-3
Diagnostic Documentation 4-3
Board Computer Troubleshooting 4-4
5 Field Replaceable Units
Introduction 5-2
Tools Required 5-2
Safety Precautions 5-2
New Parts 5-3
Exchange Parts 5-3
Local Hewlett-Packard Sales & Service Office 5-4
Replaceable Parts 5-4
Mass Storage Module Parts 5-5
EISA and PCI Module Parts 5-9
Chassis and Power Supply Parts 5-11

Contents
vii
VME Module 5-13
Model 743/744 VMEbus Board Computer Parts 5-14
Removing and Replacing Mass Storage Devices 5-15
Section Contents 5-15
Introduction 5-15
Preliminary Requirements 5-15
Removing Mass Storage Module 5-16
Procedure 5-16
Selecting Device Address 5-17
Procedure 5-17
CD-ROM 5-18
Floppy Disk Drive 5-20
DDS Tape Drive 5-21
Hard Disk Drive Address Selection 5-23
Device Locations in Tray 5-23
Mass Storage Device Removal 5-28
Procedure 5-28
Power & SCSI cables 5-28
Retaining screws 5-28
Device removal 5-28
EISA or PCI Module Removal 5-29
Preliminary Requirements 5-29
Procedure 5-29
EISA / PCI Converter Board and Backplane Removal 5-30
VME Module Removal 5-31
Preliminary Requirements 5-31
Procedure to remove VME Module 5-32
VME Backplane Removal 5-33
Power Supply and Chassis Parts Replacement 5-34

Contents
viii
Preliminary Requirements 5-34
Power Supply Removal 5-35
Power Switch Assembly 5-36
Power Distribution PCA 5-37
6 Diagrams
Functional Description of Model 748 Chassis 6-2
7 Reference Documentation
Service Documentation 7-2
System Installation and Getting Started
Documentation 7-4
8 ServiceNotes

Contents
ix
Figures
Model 748 Ruggedized Workstation 1-3
I/O Connector Panel 1-7
Serial Number Information 1-12
Model 744 Memory Slots 3-4
Model 748 Exploded View 5-4
SE Mass Storage Module Parts 5-5
FWD Mass Storage Module Parts 5-7
EISA and PCI Module Parts 5-9
Chassis and Power Supply Parts 5-11
VME Module Parts 5-13
Mass Storage Tray Removal 5-16
Early Model CD-ROM Disk Drive 5-18
Later Model CD-ROM Disk Drive 5-19
Floppy Disk Drive 5-20
DDS Tape Drive Address Selection 5-21
Later Model DDS Tape Drive Address Selection 5-22
Device Locations 1 of 4 5-23
Device Locations 2 of 4 5-24
Device Locations 3 of 4 5-25
Device Locations 4 of 4 5-26
FWD Device Locations 5-27
Mass Storage Device Removal 5-28
Tray Removal 5-29
EISA/PCI Converter Board and Backplane Removal 5-30
Magnified View of Power Switch Tabs 5-36
Removing Power Distribution PCA from the Wall 5-37
Center Wall Removal 5-38
Power Distribution PCA Removal from Chassis 5-39
Functional Block Diagram 6-2

Contents
x
Tables
Model 748 Ruggedized Workstation Features 1-4
Supported Monitors for Model 748 1-6
Supported PMC Graphics Upgrades 1-6
Supported AUI LAN Adapters and Devices 1-9
Supported 700/RX Family X-Terminals 1-9
HP-UX Operating Systems and Languages 1-11
Electrical Information 1-13
Physical Information 1-14
EISA, PCI, and VME Slot Power Availability 1-14
Environmental Information 2-3
Regulatory Information 2-4
Model 744/132L Memory Card Current Usage Work-
sheet 3-4
Model 744/165L Memory Card Current Usage Work-
sheet 3-5
Model 744 Current Requirements Worksheet 3-7
Model 743 Current Requirements Worksheet 3-8
Internal Device Current Requirements 3-9
Upper Power Supply Current Budgeting Worksheet 3-10
Lower Power Supply Current Budgeting Worksheet 3-11
Diagnostic Documentation 4-4
Model 748 SE Mass Storage Module Parts List 5-6
Model 748 FWD Mass Storage Module Parts List 5-8
Model 748 EISA and PCI Module Parts List 5-10
Model 748 Chassis and Power Supply Parts List 5-12
Model 748 VME Module Parts List 5-14
Default SCSI Addressing 5-17
Related Service Documentation 7-2
Diagnostic Documentation 7-3
System Installation and Getting Started Documentation
7-4

1-1
1
Product Information

Product Information
Product Description
1-2
Product Description
This chapter introduces the Model 748 workstation. The Model 748 uses the Model 744
board computer in one of the following configurations:
Model 748/132L ruggedized workstation
Model 748/165L ruggedized workstation
Figure 1-1 shows the Model 748 workstation, and Table 1-1 lists the Model 748 worksta-
tion features.

Product Information
Product Description
1-3
Figure 1-1 Model 748 Ruggedized Workstation

Product Information
Product Description
1-4
Table 1-1 Model 748 Ruggedized Workstation Features
Feature Functionality
Operating system HP-UX
CPU 132 MHz PA-RISC 7300LC in Model 748/132L
165 MHz PA-RISC 7300LC in Model 748/165L
Time sources Battery-backed Real-Time Clock Bus error timer
Memory 1 RAM stack
Maximum memory is 1GB
Built-in interfaces HP Parallel, SCSI, AUI LAN, HP-HIL, RS-232C (2 ports)
Graphics On-board
Mass storage
module Up to four devices, including:
4 or 9 GB hard disk drive
2, 4-8, or 12-24 GB DDS tape drive with data compression
3.5 in. flexible disk drive
CD-ROM drive
VME module 8 VME slots (six slots for VME add-in cards, two for SPU)
EISA module Up to four EISA accessory cards
PCI module Up to four PCI accessory cards (Replaces EISA module)
Power supply Two 300 watt power supplies

Product Information
Product Description
1-5
Rack Mounting Configurations
Rack mounting orientations, either front out or back out are supported. Power switching
has both front and back accessibility. Status and test LEDs are located on the Model 744
VMEbus Board Computers. The mass storage module can be configured for front or rear
access to removable media. A rack-mount kit is supplied with each workstation.
These features allow the workstation to be operated from either the front or back, depend-
ing on how they are mounted. EISA and VME card cages are fixed and cannot be
reversed.
Memory
Standard memory is an Error Checking and Correcting (ECC) RAM board. 32 MB is the
minimum required for the HP-UX operating system. Memory boards are designed to be
stacked in the single stack available on a Model 744. Options may add more factory
installed memory.
Memory for a 744 upgrade include:
• HP A4503A 64 MB RAM card
• HP A4449A 128 MB RAM card
• HP A6005A 256MB RAM card
Mass Storage
Up to four single-ended SCSI devices may be installed in the mass storage tray. One or
two single-ended SCSI removable media devices may be installed. Mass storage devices
are factory installed with the removable media drives accessed from the front. Users may
reconfigure devices to reverse the access. Hard disk drives are single-ended devices in the
standard tray. Hard drives are typically installed behind the removable media devices.
Mass storage devices are also available as these upgrades:
• 4 GB SE Hard Disk Drive Upgrade
• 9 GB SE Hard Disk Drive Upgrade
• DDS Tape Drive Upgrade
• CD-ROM Disk Drive Upgrade
• 3.5-in. Flexible Disk Drive Upgrade

Product Information
Product Description
1-6
System Graphics
The Model 748 supports system board (on-board) graphics.
System Board Graphics
These products have system board graphics configurations factory set. They can be
changed by users. Table 1-2 lists the monitors supported. Note that grayscale monitors are
not supported.
GSC Mezzanine (Expansion Kit) Slot
Model 748 ruggedized workstation computers support GSC upgrades.
PMC Expansion
The Model 748 accepts the PMC expansions available for the Model 744 board computer.
Table 1-3 shows the supported PMC graphics upgrades.
Depending on which HP-UX operating system you are running, you can have up to three
graphic heads connected. To support four graphics heads, you must have HP-UX 10.20
ACE or higher.
Built-In Interfaces
This section describes the built-in interfaces of the Model 748 workstation.
Table 1-2 Supported Monitors for Model 748
Type Resolution
17-inch color
19-inch color
1280 x 1024
1280 x 1024
Table 1-3 Supported PMC Graphics Upgrades
Product Number Product Name Products Included
HP A4979A Visualize-EG
Graphics One PMC Graphics Card

Product Information
Product Description
1-7
Model 744 System Board Interfaces
The Model 744 built-in interfaces have ports on the connector panel as shown in Figure 1-
2. For full descriptions including pin-I/O information consult the appropriate model
owner’s guide and service handbook.
Figure 1-2 I/O Connector Panel
Small Computer Systems Interface (SCSI). A cable from the mass storage module con-
nects to the system board’s SCSI connector and must be connected for internally mounted
SCSI drives to operate. SCSI interface circuits use high-density, shielded connectors. The
mass storage module has a separate SCSI connector for connecting external SCSI device
cables. When the external SCSI interface connector is not used, a SCSI terminator should
be plugged into the SCSI connector. The internal cable length is 1.8 meters (5.9 feet).
RS-232 Serial Interface. Two 9-pin RS-232 serial interface ports are provided, labeled A
and B. Terminals and other RS-232 devices are supported on the RS-232 interface connec-
tors. The A connector is used for the console.
HP Parallel Interface. A 25-pin HP Parallel interface port is provided for use with
devices using the CentronicsTM interface protocols.
NOTE: You can only use one of the Human Interfaces (HP-HIL or PS-2) at
a time for a keyboard or other device. Using one automatically
excludes the other interface.
HP-HIL. The HP-HIL connector (located on the EISA module, if ordered with your sys-
tem) accepts a variety of HP-HIL input devices. However, HP-HIL devices are no longer
available from HP.

Product Information
Product Description
1-8
PS/2 Ports. Two PS/2 Ports are integral parts of the 743/744 VMEbus Board Computer
which provide the primary interface for the PS/2 keyboard and mouse. The keyboard and
mouse are part of localization kit HP A4030A.
Local Area Network Interface. The IEEE 802.3 Ethernet Local Area Network (LAN)
circuit on the system board has one interface port for an AUI transceiver or media attach-
ment unit (MAU). No ThinLAN circuits or BNC connector is installed. Table 1-4 lists the
supported LAN adapters and other network devices. Table 1-5 lists supported X-terminals.

Product Information
Product Description
1-9
Audio Interface. Model 744 board computers provide compact disc-quality audio input
and output in stereo with a 16-bit coder-decoder (CODEC) over a frequency range of 25-
20,000 Hz. A conversion cable provides a stereo headphone mini-plug for output, and a
stereo line-in and mono microphone mini-plugs for input.
EISA Module. The Model 748 has a 4-slot EISA module.
Table 1-4 Supported AUI LAN Adapters and Devices
LAN Adaptor Network Devices
HP 28641A/B ThinLAN Transceiver HP 28645A Multiport Repeater, 1 AUI/f, 3
30Base2/m
HP 28648B LAN Bridge 2 AUI/f
HP 28649A IEEE 802.3 LAN to 802.5
Token Ring
Bridge
HP 28683A Fiber Optic Transceiver
HP 28685A 10BaseT EtherTwist MAU HP 28682A Fiber Optic Hub Plus
HP 30241A 10Base5 ThickLAN MAU HP 28684A EtherTwist Hub
Table 1-5 Supported 700/RX Family X-Terminals
Product
Number Product Name
HP C2701A 700/RX Mi Base Unit
HP C2702A 700/RX 19Mi X-Station
HP C2704A 700/RX Ci Base Unit
HP C2705A 700/RX 14Ci X-Station
HP C2706A 700/RX 16Ci X-Station
HP C2709A 700/RX Ca Base Unit
HP C2711A 700/RX 19Ca X-Station

Product Information
Product Description
1-10
PCI Module. The Model 748 has an optional 4-slot PCI module that accommodates stan-
dard +5V bus signalling accessory cards. The PCI module requires a minimum HP-UX
release of 10.20.
VME Module. The VME module has six slots available for add-on cards, numbered 3
through 8 (slots 1 and 2 are used by the board computer). The slots conform to the 6U
form factor. Slot numbers from top to bottom are 8 through 1. The VME backplane pro-
vides an interconnect connector for the EISA/PCI module.
Hardware Architecture
Most of the functionality is on one assembly, the Model 743/744 VMEbus board com-
puter. The Model 743/744 has the interface controllers, CPU circuits, memory controller
and graphics/video circuits. RAM boards plug into sockets on the system board. The
VMEbus board computer typically plugs into slots 1 and 2 of the VME backplane.
A split power VME backplane (slots 3 through 8 have a dedicated power supply) provides
8 slots of which 6 may be used for VME add-on cards.
The EISA and PCI card cages have their own interface converter boards and accessory
card backplanes. Test and function LED indicators are located on the Model 743/744
back panel. The mass storage module gets interface data through a cable connected to the
system board.
Operating Systems
HP-UX
HP-UX 10.20 (or later) is supported on the Model 748 Ruggedized Workstations with the
Model 744 as the board computer. HP-UX 9.05 (or later) is supported on the Model 748
Ruggedized Workstations with the Model 743 as the board computer. The Model 748 is
booted from an internal hard disk drive factory installed with Instant Ignition. HP-UX may
also be installed from external DDS or CD-ROM drives. If the workstation is a client on
LAN, HP-UX can be booted over the LAN.
Table 1-6 lists the HP-UX operating systems and languages for the ruggedized worksta-
tions.