HP Integral Personal Computer User manual

Integral Personal Computer
Service Manual

r~3 HEWLETT
.:!. PACKARD
Integral Personal COftlputer
. Service Manual
OHewlett-Packard Company 1885
Printed In U ••• A.
_dillon a 1/ ••

Printing History
Edition 1 .................... December 1984 .................... Mfg. No. 00095-90086
Edition 2 ..................... January 1986 ..................... Mfg. No. 00095-90127

CUpt.r
1
1.1
1.2
1.3
1.4
2
3
3.1
3.2
4
S
5.1
5.2
5.3
5.4
5.5
5.5.1
5.5.2
5.6
5.6.1
5.6.2
5.7
5.7.1
5.7.2
5.8
5.8.1
5.8.2
5.8.3
5.9
5.9.1
5.9.2
S.10
5.11
S.12
S.13
5.14
5.15
5.16
Contents
p ...
Product Information
Introduction ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-1
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 1-3
Serial Number Information ........................................ 1-6
Sit. Preparation and ...... ir .........
Install.tion .net Conlgumion
Introduction ..................................................... 3-1
Preparation ..................................................... 3-1
Preventiv .... Int ...... c.
Function •• Description
Introduction ....................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5-1
CPU ........................................................... 5-3
Interrupts ....................................................... 5-4
RAM ........................................................... 5-4
ROM ........................................................... 5-4
The Plug-In ROM Assembly ..................................... 5-4
The ROM Bus ................................................. 5-5
MMU .......................................................... 5-5
Address Mapping .............................................. 5-5
Physical Address
Bit 23 ......................................... 5-6
Internal I/O .................................................... 5-6
Internal
I/O Addressing ......................................... 5-6
The Lo~c A to Lo~c B Bus ..................................... 5-7
External 1/0 ..................................................... 5-8
External I/O Addressing ........................................ 5-8
The External I/O Bus ........................................... 5-9
The 1/0 Backplane ............................................ 5-10
Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 5-11
The Display Controller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5-11
The Display Assembly
......................................... 5-12
Keyboard
...................................................... 5-12
Disc Drive and Controller ........................................ 5-13
Printer ........................................................ 5-14
Real-Time Clock
................................................ 5-14
Speaker
....................................................... 5-15
Hp.:.IB Interface ................................................. 5-15
Power Supp~y ................................... : .............. 5-16

Iv Contenta
•
6.1
6.2
6.3
6.4
6.5
6.6
6.1
6.8
6.9
6.9.1
6.9.2
6.10
6.11
6.12
6.12.1
6.12.2
6.12.3
6.12.4
6.13
6.14
6.15
6.15.1
6.15.2
6.16
6.16.1
6.16.2
6.16.3
7
•
8.1
8.2
8.2.1
8.2.2
8.2.3
8.2.4
8.3
8.4
8.S
8.5.1
8.5.2
8.5.3
8.5.4
8.5.5
8.6
Int ..... P ......... Computer
Removal .ncI Repla.lDent
Introcluction ..................................................... 6-1
Safety Considerations .................. . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-1
ESD Considerations .............................................. 6-1
Req,uired Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-2
Removing
the Back Case .......................................... 6-3
Removing the tid ................................................ 6-3
Rer.noving the Logic A P~ ....................................... 6-4
Removing the Logic B PCA
....................................... 6-6
The Printer Asser.nbly ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-9
Rentoving the Printer ........................................... 6-9
Servicing
the Printer ........................................... 6-12
Removing the Disc Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 6-19
Removing the Display Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-21
The Base Asse~bly .............................................. 6-26
Removing the Base Assembly
................................... 6-26
Removing the I/O Backplane PCA ............................... 6-29
Removing the HP-IB Ribbon-Cable Assembly ...................... 6-29
Removing the Power-Supply Assembly
........................... 6-29
Removing the Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 6-32
Removing the Keyboard Connector Assembly
........................ 6-32
The Keyboard .................................................. 6-32
Removing
the Keyboard Assembly ............................... 6-33
Replacing
the Keyboard Legs .................................... 6-35
The ROM Assembly ............................................. 6-36
Removing the ROM Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-36
Disassembling
the System V ROM Assembly ...................... 6-38
Replacing the ROM Connector Pins .............................. 6-40
Adjustments
Troubl •• hootlng .nd Di_gnostics
Introduction ................................................. . . .. 8-1
Description of Diagnostics ......................................... 8-1
Turn-On Self Tests ............................................. 8-2
Service ROM Diagnostic Tests .................................... 8-2
Service Diagnostic Disc Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 8-4
Error
Number Interpretation ..................................... 8-4
Safety Considerations ...... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 8-5
RequUed Toom and Equipment" ..................................... 8-5
Main Diagnostic Procedure
........................................ 8-6
Problem Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 8-8
Thrn-On Self Tests ............................................. 8-8
Service ROM Tests
............................................. 8-9
Service Diagnostic Disc Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 8-11
Functional Verification
......................................... 8-13
Troubleshooting and Repair .............................. , . . . . . . .. 8-13

Chap ...
Pale
• ....,..0 ...... Parts
9.1 Introduction ................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 9-1
9.2 Ordering Information
............................................. 9-1
9.3 nlustrated Parts Breakouts
......................................... 9-1
10 lIeference
10.1
10.2
10.3
10.4
10.4.1
10.4.2
10.4.3
10.5
11
11.1
11.2
11.2.1
11.2.2
11.2.3
11.2.4
11.2.5
11.2.6
Introduction
.................................................... 10-1
Additional Technical Information .................................. 10-1
Keyboard Identification .......................................... 10-1
Connector Pin Assignments ....................................... 10-2
The ROM Receptacle .......................................... 10-3
The Logic A to Logic B Bus Connectors .......................... 10-4
The I/O Backplane Connectors .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 10-4
Error Messages ................................................. 10-6
Product History
Introduction ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 11-1
DesigIl Changes ................................................ 11-1
Logic PCA Changes ........................................... 11-1
Display
Flex Cable Changes .................................... 11-1
Shadow PCA Elimination
...................................... 11-2
Power Supply Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 11-2
Disc Drive Assembly Changes ................................... 11-2
New Plug-In
ROM Assembly ................................... 11-2
12 ........
Illustrations
FI,.. Title
1-1 Integral Personal Computer-Front View .............................. 1-2
1-2 Integral Personal Computer-Rear View ............................... 1-2
1-3 Integral Personal
Computer-Internal View ............................ 1-3
5-1 Integral PC Block Diagram
.......................................... 5-1
5
.. 2 I/O Port Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5-9
5-3 Display Block Diagram
....... '. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5-11
5-4 Disc Drive
Block Diagram .......................................... 5-13
5-5 Printer Block Diagram
............................................. 5-14
5-6 Power Supply
Block Diagram ....................................... 5-16
6-1 Back Case Screws
..... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-3
6-2 Computer-Ud Rocker ............................................... 6-4
6-3 Logic A Shield Screws ................................. . . . . . . . . . . . .. 6-4
6-4 Logic A PCA Mounting Screws and Feed-Through Connector ............ 6-5
6-5 PCA Mounting-Panel S~ws ........................................ 6-6
6-6 Grommeted Hole in Logic B Shield ................................... 6-7
6-7 Logic B
PC~ Screws and Feed-Through Connectors ................... " 6-7
6-8 Display Cable Orientation
........................................... 6-8
6-9 RemOving the Printer Cover
......................................... 6-9
6-10 ESD Shield ...................................................... 6-10

vi Content.
• ........ ,. ...... IC ......... '
FIgure Title ,-'
6-11
6-11
6-12
6-13
6-14
6-15
6-16a
6-16b
6-17
6-18
6-19
6-20
6-21
. 6-22
6-23a
6-23b
6-23c
6-24
6-25
6-26
6-27
6-28a
6-28b
6-29a
6-29b
6-30a
6-30b
6-30c
6-31a
6-31b
6-32
6-33
6-34
6-35
6-36
6-37
6-38a
6-38b
6-39
6-40a
6-40b
6-41
6-42
6-43
6-44
6-45
8-1
8-2
8-3
8-4
8-5
8-6
Printer Switch Panel
Printer Mounting Screws
........................................... 6-11
Bail-Arm
Adjustment-Right Side ................................... 6-12
Bail-Arm Adjustment-Left Side .................................... 6-13
Grit-Wheel Installation
............................................. 6-13
Pin-Wheel Replacement-Correct Alignment .......................... 6-14
Pin-Wheel Replacement-Incorrect Alignment .... '..................... 6-14
Pin Wheel Guide Replacement
...................................... 6-15
Carriage-Screw Removal ........................................... 6-16
Bail-Arm Removal-Spring in Outward Position ....................... 6-17
Bail-Arm and Spring Identification .................................. 6-17
Right Bail-Arm and Spring ......................................... 6-18
Home Switch
and Out-Of-Paper Switch Locations ..................... 6-19
Disc-Drive Mounting
Screws-Top ................................... 6-20
Disc-Drive Mounting Screw-Bottom ................................ 6-20
Bezel Mounting Screws' . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-21
Disconnecting the Disc-Drive
Bezel .................................. 6-22
The Pivot Clamp
and Dashpot Bracket ............................... 6-22
Display-Bezel Tabs
and Panel Spring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-23
Disengaging the Display-Bezel Tabs .................................. 6-23
Display-Assembly Details-Front .................................... 6-24
Display-Assembly Details-Back . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-25
Grounding Nut ................................................... 6-26
Base Assembly Mounting Screws .................................... 6-27
Base Assembly Cover Screws and Nuts .............................. 6-27
Base Assembly With Cover Removed ................................ 6-28
Reinstalling the Base Assembly Cover ................................ 6-28
Power-Supply Assembly Showing AC Line Filter . . . . . . . . . . . . . . . . . . . . . .. 6-30
Power-Supply Assembly Showing Mounting Screws .................... 6-30
Power-Cable Harness .............................................. 6-31
Keyboard Connector Assembly ...................................... 6-32
Keyboard Bottom Screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-33
Keyboard Top Screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-33
Keyboard
Assembly-Mounting Screws ............................... 6-34
Keyboard Assembly-Cable Connector and Ground Lug ................ 6-34
Installing a Keyboard Leg .......................................... 6-35
Keyboard Leg in Cosed Position .................................... 6-35
Unlocking the ROM Door .......................................... 6-36
Unlocking System III ROM Assembly ................................ 6-37
Removing System
III ROM Assembly ................................ 6-37
Removing the System V ROM Assembly ............................. 6-38
Removing the ROM Assembly Cover ................................ 6-39
Separating the ROM PCAs
......................................... 6-39
Reinstalled peAs ................................................. 6-40
Aligrting the Pins
................................................. 6-41
Troubleshooting Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. .... 8-7
Function Key Menu ............................................... 8-10
Second Function
Key Menu ........................................ 8-10
Turn-On Analysis Flow Chart ....................................... 8-14
Power Supply Test Setup .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 8-17
Power Supply Repair Simplified Flow Chart
.......................... 8-21

Int .. , ......... n •• eomput.,
Cont ..... ,,11
.... ,. Tla.
8-7 Power Supply Repair Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 8-23
8-8 Connector Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 8-42
8-9 Printer Test Pattern ............................................... 8-49
8-10 Troubleshooting Setup ............................................. 8-63
9-1 Front Case Assembly Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 9-2
9-2 Front Disc Assembly Exploded View .................................. 9-4
9-3 Logic Shield Assembly Exploded View ................................ 9-6
9-4 Base Assembly Exploded View ....................................... 9-8
9-5 Front Printer Exploded View
......... '. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 9-10
9-6 Front Assemblies Exploded View .................................... 9-12
9-7 Keyboard Exploded View ........................................... 9-14
9-8 Printer Exploded View ............................................. 9-16
9-9 Rear Assemblies Exploded View
..................................... 9-20
9-10 System V ROM Assembly Exploded View
............................ 9-22
9-11 Logic A PCA Component-Location Diagram
.......................... 9-24
9-12 Logic B PCA Component-Location Diagram
........................... 9-26
9-13 Power Supply PCA Component-Location Diagram ..................... 9-28
9-14 Operating System ROM PCA Component-Location Diagram ............. 9-31
9-15
Option ROM PCA Compnent-Location Diagram ....................... 9-32
12-1 Logic A PCA-CPU, MMU, External I/O Schematic Diagram ........... 12-3
12-2 Logic A
PCA-RAM, ROM Schematic Diagram ....................... 12-5
12-3 Logic A PCA-IDTACK, I/O, Logic B Interface Schematic Diagram ...... 12-7
12-4 Logic A PCA-Keyboard Interface Schematic Diagram ......... ',' . . . . . .. 12-9
12-5 Logic B PCA-Display Control Schematic Diagram .................... 12-11
12-6 Logic B PCA-Disc Controller Schematic Diagram. .................... 12-13
12-7 Logic B PCA-Printer Controller Schematic Diagram .................. 12-15
12-8 Logic B PCA-Printhead Supply and Drive, and Speaker Controller ..... 12-17
Schematic Diagram
12-9 Logi~ B PCA-HP-IB Interface Schematic Diagram. . . . . . . . . . . . . . . . . . .. 12-19
12-10 Logic B PCA-RTC, System, and Power Connect Schematic Diagram .... 12-21
12-11 Power Supply Schematic Diagram .................................. 12-23
Tables
Ta.... TItle
1-1 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-3
5-1 Voltage Requirements ................................................ 5-2
5-2 Physical Address Map ................................ ,............. 5-3
5-3 Interrupt Allocations ............................................... 5-4
5-4 ROM Select Address Ranges
.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5-5
5-5 Internal I/O Physical Address Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5-6
5-6 Internal
I/O Device-Select Signals .................................... 5-7
5-7 Extem~l I/O Physical Address Map .................................. 5-8
6-1 Required Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 6-2
8-1 Required Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 8-5
8-2
Turn-On Problems ................................................ 8-14
8-3 Power-Supply Verification
.......................................... 8-16

viii COnt .....
Integr •• 11.-.1 Computer
... b ••
Title P
...
8-4 Power-Supply Repair .............................................. 8-21
8-5
RAM Troubleshooting and Repair ................................... 8-29
8-6 MMU Troubleshooting
and Repair ................... . . . . . . . . . . . . . . .. 8-30
8-7 Keyboard Troubleshooting and Repair ................................ 8-31
8-8 Display
/GPU Troubleshooting and Repair ............................ 8-33
8-9 Disc Drive Troubleshooting
and Repair ............................... 8-37
8-10 Real Time Oock Troubleshooting and Repair ... . . . . . . . . . . . . . . . . . . . . . .. 8-40
8-11 Speaker Troubleshooting and Repair ................................. 8-41
8-12 HP-IB Troubleshooting
and Repair ................................... 8-42
8-13 Printer Error Messages
.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 8-44
8-14 Printer Power-On Diagnostics
....................................... 8-46
8-15 Printer Self-Test Results
... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 8-50
8-16 Troubleshooting the Printer Control Circuitry .......................... 8-52
8-17 Troubleshooting the Printer ROM,
RAM, and CPU . . . . . . . . . . . . . . . . . . . .. 8-53
8-18 Troubleshooting the Carriage-Motor Circuitry
.......................... 8-54
8-19 Troubleshooting the Home-Switch Circuitry
........................... 8-55
8-20 Troubleshooting the Paper-Advance Circuitry ...................... . . .. 8-56
8-21 Troubleshooting the Printhead Circuitry
.............................. 8-56
8-22 Activating the Printhead
........................................... 8-57
8-23 Troubleshooting the System Clocks
........ ' .......................... 8-58
8-24 Troubleshooting
DTACK and Interrupt Problems ....................... 8-59
8-25 Troubleshooting External
I/O Problems .............................. 8-61
8-26 Troubleshooting the Plug-In ROM Assembly
.......................... 8-62
8-27 Troubleshooting Setup
............................................. 8-63
9-1 Front Case Assembly Replaceable Parts
............................... 9-3
9-2 Front Disc Assembly Replaceable Parts
................................ 9-5
9-3 Logic Shield Assembly Replaceable Parts
.............................. 9-7
9-4 . Base Assembly Replaceable Parts
............................ :........ 9-9
9-5 Front Printer Replaceable Parts
..................................... 9-11
9-6 Front Assemblies Replaceable Parts
.................................... 9-13
9-7 Keyboard Replaceable Parts
........................................ 9-15
9-8 Printer Replaceable Parts
.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 9-17
9-9 Rear Assemblies Replaceable Parts
................................... 9-21
9-10 System V ROM Assembly Replaceable Parts .......................... 9-23
9-11 Logic A PCA Replaceable Electronic Parts
............................ 9-25
9-12 Logic B PCA Replaceable Electronic Parts
............................ 9-27
9-13 Power Supply PCA Replaceable Electronic Parts
....................... 9-29
9-14 Operating System
ROM PCA Replaceable Electronic Parts .............. 9-31
10-1 Keyboard Identification Codes ...................................... 10-2
10-2 ROM Receptacle Pin Assignments
................................... 10-3
10-3 Logic A
to Logic B Bus Pin Connections ............................. 10-4
10-4
I/O Backplane Connector Pin Assignments ........................... 10-5
10-5 Self-
Test Error Messages ........................................... 10-6
10-6 Service
ROM Error Messages ....................................... 10-6
10-7 Service Diagnostic Disc Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 10-9

Chapter 1
Product Information
1.1 Introduction
This chapter provides an overview of the Integral Personal Computer.
The Integral PC is a fully integrated system that contains a built-in disc drive and printer. It is de-
signed for ease of operation and flexibility. The computer is capable of multi-tasking. It provides
extensive I/O (input/output) and interfacing capabilities.
1.2, Description
The computer is based upon a 16-bit CPU (central processing unit) and contains Sl2K-bytes of inter-
nal RAM (random-access memory). The computer reserves address space for up to 1M-byte of internal
ROM (read-only memory), all contained in a plug-in ROM assembly.
Notel Current production units are equipped with a plug-in ROM assembly that has room for
two ROM PCAs. The operating system ROM PCA is standard. It contains the HP-UX System
V operating system (address space is reserved for up to SI2K-bytes of operating system ROM).
An option ROM peA, containing up to SI2K-bytes of optional ROM (for languages and appli-
cation programs), may be added to the plug-in ROM assembly.
Early production units are equipped with a plug-in ROM assembly containing
the HP-UX
System III operating system
on two ROM peAs. This assembly cannot be expanded. It cannot
be serviced to the component level.
The follOwing devices are integral parts of the computer:
• A 31 /z-inch micro-floppy disc drive. _
• A 255 by 512 pixel electroluminescent display. (The display can be configured for up to 31 lines
with up to 85 characters per line.)
• A 90-key detachable keyboard.
• An HP-IB (IEEE-4BB) interface.
• A thermal inkjet printer.
• A real-time dock.
• A speaker.
• An external I/O bus with two I/O ports for interfaces and memory modules.

1·2 Product Info,matlon
Integ,,, Personal Compute,
The I/O capabilities of the computer can be expanded by adding up to two HP 82904A Bus Expanders
to the system. Each bus expander provides five ports,
but requires one of the computer I/O ports,
giving a maximum
of 10 I/O ports.
The computer has three major printed-circuit assemblies (PCAs): the logic A PCA, the logic B PCA,
and the power supply PCA.
The logic A PCA contains the CPU, RAM, MMU (memory-management unit), and keyboard control-
ler. The plug-in ROM assembly plugs into the ROM receptacle on the logic A PCA.
The logic B PCA contains the clock, the speaker. the HP-IB interface, the power supply for the print
head,
and the control circuitry for the disc drive, display, and printer.
The power supply provides
+5V, + 12V, -12V, +15V, and + 18V outputs.
The major system assemblies
and I/O devices are identified in figures 1-1, 1-2, and 1-3.
Prlnt.r _______ ~
DI ..... V
ROIl
Door
------- ~
Disc
.....L __ -- ..... ------ Driv.
Figur. 1·1. Integral Personal Computer-Front View
#; ....... .
~---------~-------~.-~- .. --'-~--. ~:.-.-----------,-
•
,----.- ·-------(·.1
I
.. ___ . ______ . ___ J
"P.,.-----·o-.---~------ .... T I:. ____________ :..!..J. .... ----:!!t.
Figur. 1·2. Integra. Persona. Computer-Rear View

Int.., •• Peno ... 1 eo ..... uter
DIM
Drtwa
·111·
L" • •
Product Inform .. 101I 1·3
...... APCA ........
ROM
R ... ptecle
-1/0 Porta
Figure 1·3. Inte.raa Personal C~mputer-Int.,nal View
1 .3 Specifications
Detailed equipment specifications are shown in table 1-1.
TIda •• 1-1. Specificationa
Physical Propertl ..
• Width: 425 mm (16.7 inches).
• Height: 331 mm (13.0 inches).
• Depth: 215 mm (8.5 inches),
• Weight: 11.5 kg (25.3 pounds).
CPU
• 68000 microprocessor (16 bit, 8 MHz).
RAM
• Memory mapped; four segments.
• S12K-bytes internal RAM.
• Up to 1M-bytes external RAM.
110M
• All internal ROM is contained in the plug-in ROM assembly (up to 1M-byte), This assembly
has room for two ROM peAs, each with room for up to 5I2K-bytes of ROM: 1) the operating
system ROM
peA (which is standard), and 2) an option ROM peA.

Table 1·2. HP Portabl. Plus Computer Specifications (Continued)
Ixtern •• 1/0 aus
• Two I/O ports are provided (port A and port B).
• Maximum total power to both I/O ports: 9 watts.
• lWo interfaces or memory modules may be plugged into I/O ports A and B. One can draw up
to 6 watts (either port); the other, 3 watts.
• I/O capability is expandable to 10 I/O ports using two bus expanders (each has its own power
supply).
Di.pt.,
• 255 by 512 pixel electroluminescent display.
• Up to 85 characters by 31 lines. (Default of 80 characters by 24 lines.)
• Viewing angle: greater than 120 degrees in a horizontal plane.
• Display tilt: adjustable in 2-degree steps from 5 to 17 degrees.
• 32K-byte dedicated bit-mapped display memory.
Prlnt.r
• Thermal inkjet printer.
• 80 characters per line at 12 characters per inch (normal mode).
• Peak printing speed: 150 characters per second.
• Screen copy in 26 seconds.
• Roman8 character set.
• Four character sizes.
• Normal and bold character modes.
• Recommended paper: HP 92261M (500 single 81f2-by-l1-inch sheets) or
HP 92261N (2500 fan-fold sheets).
• Plain paper is usable with lower print quality.
Print H •• d
• Life: 820,000 characters (apprOXimately 500 pages).
• Shelf life (in shipping container): 18 months at 25°C.
• Shelf life (outside shipping container): 6 months
at 25°C.

DISC DrIve
• 31!2-inch micro-floppy disc drive.
• Burst transfer rate: 62.SK-bytes per second.
• Encoding: Modified Frequency Modulation.
• Rotational speed: 600 revolutions per minute.
• Capacity:
709K-byt~.
• Bytes per sector: 512.
• Sectors per track: 9.
• Total tracks per surface: 80.
• Available tracks
per surface: 77.
• Spare tracks per surface: 2.
• Wear track per surface: 1.
• Surfaces per disc: 2.
• Interleave factor: 1.
Disc .....
• Life: 3 x 106 passes per track.
• Read errors: 1 per 109 bits read.
K.poa,..
• 90-key condensed ITF (Integrated Terminal Family) keyboard.
• Detachable, low profile (30 mm high).
• Adjustable tilt, 0 or 8 degrees.
• Modified HP-HIL (Hewlett-Packard Human Interface Unk) keyboard interface with two
HP-HIL connectors.
......
• Frequency range: 100 to 5000 Hz.
1IHI-1'IIII. Clock
• Accuracy: maximum error, 120 seconds per month; typical, 30 seconds per month.
• Battery life: minimum expected, 6 years; typical, 12 years.
HP·18 Int."'.
• Maximum transfer rate: 13SK-bytes per second (software limitations may reduce the rate).
• Conforms to IEEE-488 interface standard.

1·8 Product InfOl'lll8tlon
,.. .... 1·2. HP PorbIIale Plus Computer SpeellClltlon (Continued.
Invlronmental U ... a
• Computer: Operating temperature: 0° to 40°C (32° to 104°F).
Storage temperature: -40° to 75°C (-400 to 167°F).
Operating humidity: 5% to 95% RH
at 40°C (104°F).
Non ... operating humidity: 90% RH at 65°C (149°F).
Operating altitude: 0 to 4600 m
(0 to 15,000 feet).
Non-operating altitude: 0 to 15,300 m (0 to 50,000 feet).
• Disc media: Operating temperature: 10° to 40°C (50° to 104°F).
Long-term storage temperature: 10° to 60°C (50° to 140°F).
Transporting temperature: -40° to 60°C (- 40° to 140°F).
Humidity: Sera to SO% RH at 40°C (104°F).
• Print Head: Operating temperature: 10° to 40°C (500 to 104°F).
Storage temperature: -20
0 to 60°C
(-4° to 140°F).
Humidity: 5% to SO"o RH at 40°C (104 oF).
Power Requirements
• Volta.e, 87 to 127 Vac (115 Vac line).
195 to 264
Vac (230 Vac line).
• Frequency: 47.5 to 66 Hz.
• Power: 88W.
1.4 Serial Number Information
The serial number of the computer is used for identification and the determination of warranty status.
It is located on the safety label near the power cord receptacle. Its format is described below.
A
YYWWBXXXXX
--~ f
+ .... - ---- Sequence number.
10. ________ Location manufactured:
A: USA
B: Brazil
Q: United Kingdom
S: Singapore
'---------- Week manufactured.
'------------ Year manufactured (years since 1960).

Chapter 2
Site Preparation and Requirements
There are no special site preparation requirements for the Integral PC.

Chapter 3
Installation and Configuration
3.1 Introduction
The Integral Personal Computer is a self-contained computer system, complete with printer and dis-
play. Therefore, setting up the unit requires little time and is very simple. This chapter tells you how to
set up the computer for use or in preparation for troubleshooting.
3.2 Preparation
CAUTION
Be sure the computer is set for the line voltage that you are using. Check the selector switch on
the back panel near the power cable. Failure to do this can result in improper operation and/or
possible damage to the computer.
1. Place the computer on a table with the back panel facing toward you.
2. Make sure that the line voltage switch on the back of the computer is set to the correct voltage
(115
or 230 Vac).
3. Make sure that a good fuse of the proper rating is installed in the fuse receptacle on the back
panel. A computer operating on 115 Vac requires a 1.SA fuse. A computer operating on 230 Vac
requires an 800-mA fuse.
4. Tum the computer around, so that the front now faces you.
L Press the buttons on the two latches on the top cover and slide them toward the carrying handle.
.. Lift up on the cover. It will swing up on its hinges.
7. Push the cover away from you. It will swing down along the back of the case. Make sure the
keyboard doesn't fallout (don't open the printer lid until you remove the keyboard).
L lift the keyboard up and out of the front of the case, and place it on the table in front of the
computer.
I. Plug the keyboard cable into either of the two HP-HIL jacks.
10. Plug an ac power ,cable into the receptacle on the back of the computer and into an ac outlet.
11. Install paper in the printer as follows: Open the printer lid. Pull the paper bail forward. Push the
paper down into the slot between the printer mechanism and the case. Continue pushing the
paper until it comes out in the front of the printer mechanism. Adjust the top of the first page to a
position just above the bail arm, engage the sprocket pins in the paper holes, then lower the bail
arm.
For best results, use the recommended ThinkJet paper (refer to table 1-1).

3·2 In ................ ContI .........
12. Install the printhead in the printer carriage as follows: Press down on the latch lever to open the
printhead carrier. Position the printbead in the carrier, then raise the latch lever to lock it in
position.
CAunOM
Be sure to remove the printbead cartridge before shipping the unit. It is possible for the ink to
leak out of the cartridge while in transit, especially in an unpressurized airaaft cargo compart-
ment. A leak may result in damage to the computer.

Chapter 4
Preventive Maintenance
The Integral PC does not require any preventive maintenance. However, the following practices
should be observed to avoid damage to the unit and to obtain best results:
• Remove the printhead (ink cartridge) whenever shipping or storing the unit. This prevents possible
damage caused
by ink leaking out of the cartridge. This is particularly important when the unit is to
be shipped in an unpressurized aircraft cargo compartment.
• Always insert the shipping disc (HP part number 1535-4881) in the disc drive before shipping the
computer. This prevents possible damage to the disc drive.
• Avoid leaving the unit on continuously for an extended period while not in use. This prevents
unnecessary wear on the electroluminescent display.
• Use care when deaning the exterior of the unit, especially the display screen, to prevent scratching.
The display saeen is made of clear plastic, and it is easily scratched or damaged. Use a clean, damp,
soft cloth to dean the display screen and plastic case. You can dampen the cloth with a warm, mild
soap solution jf necessary. Do not use petroleum distillates, acetone, methyl ethyl ketone, or other strong
cleaners.
• If an I/O port is not being used for an extended period, replace the I/O port cover to protect the
unit.