HP 9800 SERIES User Manual

5-12 9845B/C Diagnostics
k7 Rewind TIS
Pressing (}L) rewinds a tape cartridge installed in the right-hand cartridge drive (TIS).
k8 Read/Write Memory Troubleshooter
This test allows you to select specific memory tests. If the SHIFT LOCK key is down, the test will
not stop on an error.
More than
one test can be selected. Here is a list of the available tests and the key to press to
select each test.
The
[j=:J , CD , CD and UJ keys select different memory tests. Pressing the CD
key enters the "peek and poke" portion of the memory troubleshooter program. Peek and
poke
is described at the end of this test description.
Press
Test
Marching Pattern - A test pattern is stored in memory. The first word
is read and verified and the complement of the test pattern is stored in
the first word. This sequence is continued for every word in the block
of memory.
Once the pattern has been "walked up" memory, its
complement
is walked down. The marching pattern test walks up and
down six different patterns. This test verifies that ones and zeros can
be stored
in all memory cells, and checks for opens and shorts in data
bus lines.
Refresh - Zeros are stored
in memory. The memory is left alone for
ten seconds
and then verified. Ones are then stored in memory and
the sequence repeated. This test checks the refresh circuitry.
Byte - Zeros are stored
in memory. Ones are then stored in the
right-byte using the byte operation. Memory
is then verified. Zeros are
stored
in memory and ones are stored in the left byte. Memory is
verified. The sequence is then repeated with ones stored in memory
and zeros stored in left and right bytes. This test checks memory byte
operations.
Walking bit (ones and zeros) - Every cell
in a byte half block of
memory
is set to zero. A one is written in the first cell, and all other
cells are read to verify that
it is still one. The tested cell is then restored
to a zero
and the next cell is set to a one. All cells are again read to
verify their contents. The sequence
is continued for every cell in the
block.
Its complementary pattern walking zeros completes the test.
Each 64k block
is tested, 32k bytes at a time. This test checks for
memory cell row
and column interactions. This test takes about six
hours to test each 64k byte block of memory.
Select the tests
in the order you want them to run; then press ( CONTINUE). If no tests are speCified
all the tests will be run.
Enter the octal block address of the memory block to be tested
and press (CONTINUE). If the
specified block
is not present, BLK NOT PRESENT is displayed. Press (CONTINUE) to enter
another block address.
If no block address is entered, the default is to test all blocks of memory.
Press
C!:J to test all blocks.

HP 9800 SERIES Specifications

General

Category	Storage
Series	9800 SERIES
Type	Disk Array
Drive Types Supported	SAS, SSD
RAID Levels Supported	0, 1, 5, 6, 10
Host Connectivity	Fibre Channel, iSCSI, SAS
Redundancy	Redundant power supplies and fans

Summary

9845B/C Mainframe Product Information

9845B/C Computer Specifications

Details common specifications for the System 45B and 45C computers.

HP 9845 Computer Option Information

Describes the available HP 9845 computer configurations and features.

Field Installed Options

Lists and describes options that can be installed in the field.

Accessories Supplied

Details the items packaged with each 9845 mainframe.

9845B/C Environmental/Installation/PM

9845B/C Electrical Specifications

Provides electrical specifications for the 9845B/C mainframe.

9845B/C Physical Specifications

Details the physical dimensions and weight of the 9845B/C mainframe.

9845B/C Installation

Covers procedures for installing the mainframe, including table mounting.

Initiating Power

Steps to safely power on the computer after setup and checks.

9845B/C Mainframe Verification

Procedures to verify proper system operation using exercisers.

9845B/C Mainframe Preventive Maintenance

Information on maintaining the mainframe, focusing on air filters and heads.

9845B/C Configuration

System Configurations

Details the various system configurations available for 9845B/C.

Software Compatibility

Lists available 9845 software packs and their compatibility.

9845B/C Mainframe Troubleshooting

Troubleshooting Checklist

A list of checkpoints to identify hardware failures in the 9845.

Troubleshooting Tables

Tables identifying likely failed assemblies for specific tests or diagnostics.

Troubleshooting Flowchart

A guide to identify hardware failures using procedures and checks.

Memory Troubleshooting

Guidance on interpreting memory error messages from tests.

9845B/C Mainframe Diagnostics

Quick Checks

Basic tests performed from the keyboard to check system condition.

9845B Diagnostic Programs

Overview of diagnostic programs using ROM and cartridges.

K1 Keyboard Test

Checks all keyboard keys and features for proper operation.

K8 Read/Write Memory Troubleshooter

Allows selection of specific memory tests for troubleshooting.

K11 Automatic Rack Test

Runs diagnostic tests continuously over an extended period.

K15 Run Operating System

Returns the system to normal operation after diagnostics.

9845B/C Mainframe Adjustments

Adjustments to the Thermal Printer

Procedures for adjusting the thermal printer for optimal print quality.

9845B/C Mainframe Peripherals

Ordering Information

Lists supported peripherals with part numbers and interface requirements.

Hardware Compatibility Information

Details compatibility requirements for peripherals and ROMs.

9845B/C Mainframe Replaceable Parts

Repair Philosophy

Explains assembly exchange vs. repair guidelines for field service.

Print Mechanism Parts

Lists and illustrates parts for the printer mechanism assembly.

9845B/C Service Kits

Details service kits for mainframe and options, including failure percentages.

9845B/C Mainframe Diagrams

Processor Section

Block diagram of the processor and memory control systems.

Memory Section

Illustrates read/write and read-only memory assemblies.

Keyboard Section

Explains the keyboard assemblies and logic block diagram.

Printer Section

Details the printer assemblies and logic block diagram.

9845B/C Mainframe Reference

9845B/C Manual References

Lists manual part numbers related to the 9845B/C computer family.

Mainframe Errors

Lists common mainframe errors and their potential causes.

I/O Device Errors

Details I/O error messages and recovery procedures.

Assembly-Time Errors

Lists errors encountered during the assembly process.

IMAGE Status Errors

Explains status codes related to IMAGE and database operations.

9845B/C Mainframe Service Notes

How to Punch the Service Notes

Instructions for modifying a three-hole punch for the handbook pattern.