HP 98780 CE User manual

HP 9800 Series Computers
98780 CE Handbook
Part No. 98780-90039
E 1283
Requires Binder No. 9282-0683
Fli;- HEWLETT
~~ PACKARD
Printed in U.S.A
Second Edition, December 1983

98780 CE Handbook
ct; Copyright 1982, 1983, Hewlett-Packard Company
Thisdocumentcontains proprietary informationwhich is protected by copyright
All rights are reserved, No part of this
document may be photocopied, reproduced or translated to another language without the prior written consent of
Hewlett-Packard Company, The information contained
in this document is subject to change without notice
Restricted Rights Legend
Use, duplication,
or disclosure by the Government is subject to reslrictions as set forth in paragraph (b)(3)(B) of the
Rights in Technical Data and Software clause in DAR 7-104,9(a)
Hewlett-Packard Company
3404 East Harmony Road, Fort Collins, Colorado 80525

(hdpter 1
4H7HO Prndll(1 Intonndtlon
l hdpt('r "-
n.,-;/-'o I 1I\l1"'IIIWllldi III~ldtidll"'1 t \1
l hdpll'l \
"K7KO ( Jlillqdldtl,,,,
(hdptl>l I
Q"7kO I" Id""~h(")l'l1c;
l alt1ph~1 .J
'is, SO I lld'lIH ,~II' ~
( hdjll(,l (,
9H7HO ,\dJlIstIlWllh
( hapll'r 7
YH7HO PI'T1plH'r<tI~
l hdpter H
YH7S0 Rl'pld( Pllwnt Pdrts
( hdptpr 9
woso Dld~1r<1IlI;o,
ChdPll'1 10
YHiHO Hetl'H'tl( l'
( h.'ll't"y 11
9H7HO Sl:'n Ill' Nolt's

ii
Printing History
New editions of this manual will incorporate all material updated since the previous edition. Update
packages may be issued between editions and contain replacement and additional pages to be
merged into the manual by the user. Each updated page will be indicated by a revision date at the
bottom of the page. A vertical bar in the margin indicates the changes on each page. Note thatpages
which are rearranged
due to changes on a previous page are not considered revised.
The manual printing date and part number indicate its current edition. The printing date changes
when a new edition is printed. (Minor corrections and updates which are incorporated at reprint do
not cause the date to change.) The manual part number changes when extensive technical changes
are incorporated.
October 1982 ...First Edition
December 1983 ... Second Edition. Updated pages: ii, 1-2, 8-3, 9-1.
Warranty Statement
Hewlett-Packard products are warranted against defects in materials and workmanship. For Hewlett-Packard Fort Collins
Systems Division productssold in the U.SA andCanada, thiswarranty applies for ninety (90) daysfrom the date ofdelivery.'
Hewlett-Packard will, at its option, repair or replace equipment which provesto be defectiveduring the warranty period. This
warranty includes labor, parts, and surface travel costs,
if any. Equipment returned to Hewlett-Packard for repair must be
shipped freight prepaid. Repairs necessitated by misuse of the equipment. or by hardware, software, or interfacing not
provided by Hewlett-Packard are not covered bythis warranty
HP warrants that its software and firmware designated by HP for use with a CPU will execute its programming instructions
when properly installed on that
CPU. HP does not warrant that the operation of the CPU. software. or firmware will be uninter-
rupted or error free
HEWLETI-PACKARD MAKES NO WARRANTY OF ANY KIND WITH REGARD TO THIS MATERIAL. INCLUDING. BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE Hewlett-
Packard shall not
be liable for errors contained herein or for incidental or consequential damages in connection with the
furnishing, performance or use of this material
98780-90039. rev 1283

98780 Product Information 1-1
Chapter 1
Product Information
98780A Specifications
Environmental Range
Operating Temperature:
Storage Temperature:
Ambient Humidity:
Size/Weight
Height:
Width:
Depth:
Net Weight:
Display Features
Cathode Ray Tube:
Scan:
Refresh Rate:
Vertical
Scan Rate:
Alphanumeric Display
Alpha Raster Size:
Screen Capacity:
Character Font:
Character Size:
Standard Character Set:
Additional Character Sets:
Cursor:
Highlighting:
Graphics Display
Graphics Raster Size:
Matrix Size:
Graphics Memory:
Graphics Cursor:
Resolution:
Vector Drawing Speed:
+5°C to +40°C ambient
-40°C to +65°C
<80%
26.5 cm
41cm
38 cm
14 kg
30.5 cm (12 inch) diagonal
Non-interlaced raster scan
60 Hz
60 Hz
236 mm x 149 mm (720 dots x 455 dots)
2400 characters (30 lines of 80 characters)
7 dot x 9 dot
in a 9 x 15 matrix
2.3 mm wide x
3.0 mm high (7 x 9 character)
128 ASCII characters
European, Katakana
Blinking underline, bliflking back arrow
Inverse video, blinking, underline
184 mm x 149 mm (560 dots x 455 dots)
560 dots x 455 dots
16 k-words of read/write memory
Full-screen
and small crosshair, blinking underline
Dots are spaced .33 mm center to center
254 metres per second
I

1-2 98780 Product Information
Options and Configurations
The 98780A is available as either a part of the 98458 #2XX or as part of the 98404A Upgrade
Kit.
(Upgrades 9845B to High Performance CRT)98404A
98405A
98775A
Upgrade Kit
Upgrade Kit
Light Pen (Upgrades 9845B to High Performance CRT and
fast processor)
(Also available
as 9845B #775 or 98404A #775)
Available character sets are:
9845B ASCII/European (Also 98404A standard)
9845B
#840 Katakana (Also 98404A #041)
Related Documentation
98780-90030 Service Manual
09845-93050 Monochromatic Graphics Programming Manual
09845-92005 Owner's and System Exerciser Manual
09845-90039 98780 CE Handbook
Product Support Package
The 98780A requires no special tools to service other than those which are provided for
servicing
the 98458.
Safety
LETHAL VOLTAGES ARE PRESENT INSIDE THE 98780A. RE-
FER TO THE GENERAL SAFETY GUIDELINES IN THE 98780A
SERVICE MANUAL.
Modifications for 9000 Series 500 Model 20
The 98780A display unit is used with the 9000 computers and must be modified by the addition
of a printed circuit board. This board
is installed inside its own housing that is attached to the
under side of the display housing. This board forms the interface between the 98780A and the
9000 computer. The service information is contained in the Service Manual for the 9000
computers. (HP part number 09020-90038)
98780-90039. rev: 12/83

98780 Environmental/Installation/PM 2-1
Chapter 2
Environmental/Installation!
Preventive Maintenance
Installation
The display assembly fits into place over the mainframe support legs.
I CAUTION I
THE 98780A RELIES ON THE MAINFRAME TOP COVER FOR
WEIGHT SUPPORT. THE MAINFRAME TOP COVER MUST BE
INSTALLED BEFORE INSTALLING THE 98780A.
Pull out the locking rods (one on the back of each support leg) and place the 98780A over the
mainframe support legs as shown in Figure 1-1. Push in on the locking rods to lock the 98780A
to the mainframe.
98780A Installation
Locking rod
pulled out
I

2-2 98780 Environmental/Installation/PM

Base Configuration
98780 Configuration 3-1
Chapter 3
Configuration
The following assemblies must be installed in the 9845B base to support the 98780A. (These
parts are included
in the 98404A Upgrade Kit.)
98780-65501
1818-1591
and 1818-1592
98770-66534
Enhanced Graphics ROM
Mainframe ROM for Enhanced Graphics ROM
Mainframe ROM for Enhanced Graphics ROM
Alpha Control Assembly (Replaces 09845-66503 in base.)
Refer to the 9845B Base CE Handbook Chapter for the locations of these parts.
Interfacing
The 98780A interfaces to the 9845B base via the Alpha Control Assembly (98770-66534) and
the Graphics Interface Assembly (09845-66504). Alpha information is stored in block 0 read-
write memory,
and is refreshed to the display via the IDA bus. Graphics information is transfer-
red via the I/O
bus to the display, where it is interpreted and entered into the display memory.
Status Word
The Status Word may be obtained by executing the following instructions:
STATUS 13;A
DISPA
The result is a decimal integer which may be converted to binary and interpreted as shown
below.
Bit
Bit Description
13 Graphics status
11,9 Identification bits
7 Interrupt enable
6 DMA enable
3 Option service request
2 Graphics service request
1 Softkey service request
o Light pen service request
I

3-2 98780 Configuration

Check
Is the base operating?
(Try PRINTER
IS 0
PRINT
"HELLO")
Is there any display?
Still no display?
Adjust intensity control.
Press control-stop.
Is there a cursor?
Initial Checks
Action
98780 Troubleshooting 4-1
Chapter 4
Troubleshooting
Yes -Proceed with Initial Checks.
No -
Fix base.
Yes -Proceed to Problem Charts.
No -Proceed with Initial Checks.
Proceed to Problem Charts.

4-2 98780 Troubleshooting
Problem Charts
The following charts attempt to list some of the more common problems and identify the most
probable assemblies associated with that problem. The numbers
in the charts indicate the
probability; i.e., a
"I" is the most probable cause and a "4" is the least probable cause.
Raster Problem Chart
No display
Improper focus
Improper intensity
No high voltage
Symptom
No raster deflection
Distorted raster
shapes
Alpha Problem Chart
Symptom
No alpha display
Improper or incorrect characters
Characters missing (every
other line) or incorrect
Incorrect highlighting
Alpha cursors missing
or incorrect
No
alpha blanking
Graphics Problem Chart
Symptom
No graphics display
Extra or missing vectors
Extra or missing arcs
Improper or no
area fill
Improper line type or no line type control
Random or repetitive dC)ts either !Tl!ss!ng or
always on display
Intermittent display dots
Can't read or write into graphics memory
Graphics cursors missing or incorrect
Probable Cause
A12/ CRT/
HV
All
A14 Yoke XFMR
2
4
A21
2
2
2
4
2
2 3
3
3
2
Probable Cause
A3liA32
3
3
A34
2
2
Probable Cause
A3liA32
2
2
2
2
2
2
A5liA52
2
1
2
3
3
4
2
All
4
Heat
sink
1
2
3

98780 Troubleshooting 4-3
Voltage Checks
The mainframe power supply voltages can be checked in the 98780A. Figure 4-1 shows the test
points and the corresponding voltages.
+5
-18
-60
GND
+800 V
-12
+12
+5R
-18
+18 +5 V
Figure 4-1. Voltage Test Points
Table 4-1 shows the distribution of the various voltages in the 98780A.
Table 4-1. Voltage Distribution
Voltage Comes from Used
+ 18 volts Mainframe 98780-66513 Heatsink, A12/A14 Deflection
Power Supply A21 Display Logic. 98775-66504 light Pen,
All CRT Drive
-18 volts Mainframe 98780-66513 Heatsink,
All CRT Drive
Power Supply A12/A14 Deflection, A21 Display Logic
98775-66504 light Pen
+12 volts Mainframe
A31 I/O, All CRT Drive, A12/A14 Deflection,
Power Supply
A511A52 Graphics
-12 volts Mainframe A31 I/O, A12 Deflection, A51/A52 Graphics
Power Supply
+5 volts Mainframe
All PC assemblies except 98780-66513 Heatsink
Power Supply
+5R
Regulator A12/A14 Deflection
on A12/A14
+ -15 volts Regulator A12/A14 Deflection
on A121A14
I

4-4 98780 Troubleshooting

Display Tests
Display tests for the 98780A are found on the following cartridges:
• 9845B/C System Exerciser Cartridge - 09845-92041, Rev. C
• Test Binary Cartridge - 09845-91031, Rev. C
98780 Diagnostics 5-1
Chapter 5
Diagnostics
The tests on the Test Binary Cartridge are essentially the same as the tests for the 98770A color
display with
some additions. Procedures can be found in the 98770A CE Handbook Chapter.
The tests on the 9845B/C System Exerciser Cartridge specifically test the features on the
98780A. These tests
are described here.
To load the tests from the 9845B/C System Exerciser Cartridge, latch the AUTOST key
and
switch the power on or press LOAD "A UT05T : T 1 5" E){ ECUT E. Answer the questions that
appear and select ENHGR when the test choices appear.
ENHGR runs the complete
sequence of tests automatically.
Selecting ENHGR, MENU
will give you the following test menu.
The display tests are listed
and described in the order they are performed in the Auto Cycle
mode.
Here
is a summary of the re-defined keys and the tests they initiate.
Key
Test
Page
A Alphanumerics
5-4
B Full Line Buffer 5-2
E Exit, return to main program
F Focus 5-2
G Grid
5-4
I Video Intensity 5-3
K Soft Keys 5-2
L Linearity 5-2
M Graphics memory test 5-8
P Light
pen test 5-8
R Raster 5-7
S
"B" Pattern 5-7
T Change cursor type 5-7
V Vectors 5-5
X Auto cycle 5-8
I

5-2 98780 Diagnostics
F Focus Alignment Pattern
Press F; "%" characters appear on the display. Check the characters to ensure they are clear
and readable. If necessary, remove the top covers and adjust the focus control to achieve the
best overall
character focus (refer to Chapter 4 for adjustment procedures). It may not be
possible to achieve perfect focus in all areas of the display.
L Linearity
Press L; various" +" characters appear in a pattern. This test is used to check linearity at the
factory. It
is not intended for field use.
B Full Line Buffer
Press B; the CRT displays:
This test checks the 80-character line buffers on the A34 assembly
(left leg)'plus the ability to display
information.
K Soft Keys
Press K then press each soft key on the lower CRT bezel. A display appears above the key
when
it is pressed to indicate the operation of the key.

98780 Diagnostics 5-3
Video Intensity
Press I; the following display appears to show all the various display intensities (video mixer
test).
Press continue, the large square of the previous display becomes bright (light pen bit test).
Press continue to select another test.

5-4 98780 Diagnostics
A Alpha Test
Press A; the alphanumeric display is on.
Press continue; the alphanumeric display is off (blank display).
Press continue; the alphanumeric display is on and the alternate cursor (back arrow) is displayed.
Press continue; the character set is displayed. The standard ASCII character set is shown below.
~~.t,~E .. £,.r.,.1.E:LV·,.lr;,~,~~,··tt~[1t::.t::[~f~·-',Ii:··;.f.:t~f::li.r:::'J;: 1·' • .f".8 .. '.'-++ .• -. 0123456789:; = ,:.
~~:~~, ~~;E~::,:~~~:~:~i~~:E~:~:i~;E~~~r 1 i~H: ~ ~~:~iq;~f-~~~;
~,'i.~.E .. £,.~>::f:Lt~:MTIf ~fF'~~":I[~[i.t~t:[~t~::::,.fi.;.~ ... -it:f:::Ii.~~'~ I"#J'.~~~~.:·':: "'*+, -. 01~~:45678'?:; = .::.
~:~~,n;~:~,:!:~~~:t~i~~',~~~~~i~~~~~~rli~H:~'~~:~i~'~~~~~;
i tn-1t 1+~iII1t-.L.Lf-I1L""'''''''Tj ltn-1t l+hTl1"".L.Lf-I~ l ........... T;
[tk, Hl,~hl1'~htl
1 tn-1i I+r ill' t-.L.Lf-I~ j ........... T~ltn-1t l+rITl1 ..... L.Lf-Illr.l. ...... T'
[B 1 1 nk 1 ng C ... "I'" ::.01'"']
1 tn-1t I+r !,-dt-. L.Lf-I~l""'''''''Tltn-1t l+rill1t-.L.Lf-I~ j ........... T
[E:link;rlg Chat-.:t.o:t,E"r)
.u~d Itr cr=JH:lLl.f-JJ j ..... "'tIT"t hr,t Itr =:drlLl.f-JJ j ..... "'tITl
(Unde-r::core]
Press continue to select another test.
G Grid
Press G; the grid shown below is displayed.
Press continue to select another test.

98780 Diagnostics 5-5
V Vector Test
Press V; the various linetypes are displayed. See the following photo.
[---------------------------------------
,
11lJiiifi5iiiiiiiiii-=-
---
1=1 9
I I ~
C:::::
1
I
Press continue; the following display appears. This demonstrates the vector drawing ability.
- --- -- ------ - --------------------- -------------------1
Press continue; the vectors drawn in the previous display are erased.

5-6 98780 Diagnostics
Press continue; arcs are drawn in the next display shown below.
-------------
Press continue; the arcs shown in the previous display are erased.
Press continue; the various area fill patterns are displayed.
15
14
1 .3
L2
11
1 [1
'j
+. +~+'!'!t+-!-ft+ +~'!"+++~ .• +.'!".'!".it.
''"''*:
:] [1111[[[ ,< ]JJl
jl.:rBII;IJF1"·111
-, .. _fIIItII,,~·;~aJj;_n._
5 j;;!i~W~~j~1~};;i;l*iji:,(!;;Cii;~2;';<;)2{h;W~~~;
':5
4
.3
Press continue to select another test.