HP 98770 CE User manual

HP 9800 Computers
98770 CE Handbook
Part No. 98770-90039
E1083
Requires Binder No. 9282-0683
Flin- HEWLETT
~~ PACKARD
Printed in [J SA
Second Edition, October 1983

98770 CE Handbook
f: Copyright t 982, 1983, Hewle1t-Packard Company
Thisdocumen1 contains proprietaryinformationwhich isprotected by copyright. All rights are reserved. Nopartof this
document may be photocopied, reproduced
or translated to another language without the prior wri1ten consent of
Hewle1t-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 restrictions 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

( hilplpr 1
98770 Product Informdllllll
( hilptpr l
')'611U LIIUHillllH'lltdllllstdlldtlOII 1';\1
( hdpl"1 ,~
Q",77() ( IH11Jq11ldlH1l1
( h,'!'1<'r I
')S770 1 }(,1I1Jl, ~l)(H)tlll~
( IIdpl!'1 1
q~/ffl I), H",,, ... Tl,
( hil(lt!'f h
()8770 \dJlI~tlll!'llh
( h,'1)(( 17
'1'6770 i'l'lIph"r,lb
Chdplel S
l}S770 Hepldl PIII('111 Prlft<,
( hrlptPI 9
98770 Dld~lfdm.,
Chdptl'f 10
IJI'!770 Hl'tefPIH P
( In!", 1 11
98770 ~'Wn I( P Notl''>

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 barin the margin indicates the changes on each page. Note that pages
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 numberchanges when extensive technical changes
are incorporated.
First Edition...October
1982
Second Edition...October 1983
Warranty Statement
Hewlett-Packard products are warranted against defects in materials and workmanship. For Hewlett-Packard Fort Collins
Systems Division productssold
in the USA. and Canada, this warranty applies for ninety (90) days from the dateof delivery.'
Hewlett-Packard will. at its option, repair or replace equipment which proves to be defective during 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-PacKara are not coverea by
tnlS 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
HEWLETT-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 APARTICULAR 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
. For other coun~nes cor.tact your loca! Sales ard SUPPo~ Office to de!er'T',re wana":y terrT'S

98770 Product Information 1-1
Chapter 1
Product Information
98770A Specifications
Environmental Range
Operating Temperature:
Storage Temperature:
Ambient Humidity:
Size/Weight
Height:
Width:
Depth:
Net Weight:
Power Requirements
AC Line Voltage:
Line Frequency:
Power Consumption
Display Features
Cathode Ray Tube:
Scan:
Refresh Rate:
Vertical
Scan Rate:
Vertical Retrace Time:
Horizontal Scan Rate:
Horizontal Retrace Time:
Dot Scan Rate:
+5°C to +40°C ambient
-40°C to +65°C
<80%
32 cm
46cm
45cm
29.45 kg (65 lbs. )
110 volts ac (88 to 127 Vac)
220 volts ac (198 to 250 Vac)
48 to
66 Hz (inclusive)
500 watts maximum (typical)
14 inch diagonal, delta-gun, black matrix
Non-interlaced raster scan
60 Hz
60 Hz
1. 03 milliseconds
29.1 kHz
10.2 microseconds
29.7984 MHz
I

1-2 98770 Product Information
Alphanumeric Display
Alpha Raster Size
Screen Capacity:
Character Font:
Character Size:
Character Colors:
Standard Character Set:
Additional Character Sets:
Cursor:
Highlighting:
Graphics Display
Graphics Raster Size:
Matrix Size:
Bits
Per Point
Graphics Colors:
Graphics Cursor:
Resolution:
Vector Drawing Speed:
247 mm x
154 mm (720 dots x 455 dots)l
2400 characters (30 lines of 80 characters)2
7 dot x 9 dot in a 9 x 15 matrix
2.40 mm wide x 3.09 mm high (7 x 9 character)
Black, white, red, green, blue, cyan, magenta, yellow
128 ASCII characters
European, Katakana
White blinking underline
Inverse video, blinking
and underline
192 mm x
154 mm (560 dots x 455 dots)
560 dots x 455 dots (254,800 addressable pOints)
3 (one for each electron gun)
Black, white, red, green, blue, cyan, magenta, yellow
Full-screen
and small crosshair, blinking underline
Dots are spaced .343 mm center to center
Approximately 10,000 inches per second
Modifications for 9000 Series 500 Model 20
The 98770A 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
underside of the display housing. This board forms the interface between the 98770A
and the
9000 computer. The service information is contained in the Service Manual for the 9000
computers. (HP part number 09020-90038)
1 The 98770A is capable of displaying a 247 mm x 154mm raster (720 dots x 455 dots). This raster is displayed when using the A13 test switch.
the self test fixture and the binary test cartridge. The 9845C does not use all of this area. During normal alpha operation. the alpha raster size
is 247 mm x 144 mm (720 dots x 420 dots).
2
The 9845C only uses 28 of the 30 lines.

98770 Product Information 1-3
Options and Configurations
The 98770A is available as either a part of the 9845C or as part of the 98771A Upgrade Kit.
Available accessories are:
98775A
98776A
98777A
Light
Pen (Also available as 9845C #775 or 98771A #775)
RGB Interface (Also available as 9845C #776 or 98771A #776)
Camera Attachment
Available character sets are:
9845C ASCII/European
9845C
#840 Katakana (Also 98771A standard) (Also 98771A #772)
Related Documentation
98770-90032 Service Manual
09845-92051 Color Graphics Programming Manual
09845-93005 Installation, Operating, and Test Manual
98770-90039 CE Handbook Section
Product Support Package
98770-66527 Test Fixture
98770-90031 Service Manual
09845-91031 Test Cartridge
(TBIN)
09845-92041 System Exerciser Cartridge (B/C)
09845-93005 Installation, Operation and Test Manual
Safety
LETHAL VOLTAGES ARE PRESENT INSIDE THE 98770A. RE-
FER TO THE 98770A SERVICE MANUAL FOR GENERAL SAFE-
TY GUIDELINES.
I

1-4 98770 Product Information

98770 Environmental/Installation/PM 2-1
Chapter 2
Environmental/Installation/
Preventive Maintenance
Installation
The display assembly fits into place over the mainframe support legs. Early units did not have
locking hardware
on the feet; current units do. If the hardware is there, lock it.
I CAUTION I
THE 98770A RELIES ON THE MAINFRAME TOP COVER FOR
WEIGHT SUPPORT. THE MAINFRAME TOP COVER MUST BE
INSTALLED BEFORE INSTALLING THE 98770A.
THE 98770A IS HEAVY (29.45 KILOGRAMS OR 65 POUNDS).
TO AVOID INJURY, ENLIST THE AID OF A SECOND PERSON
WHEN LIFTING THE 98770A. IF HELP IS NOTAVAILABLE, LIFT
FROM REAR OF THE UNIT.
Initial Tum-On
I CAUTION I
THE 98770A HAS NO POWER SWITCH. IT IS SWITCHED ON
VIA A RELAY WHICH IS ACTIVATED WHEN THE 9845C MAIN-
FRAME
IS SWITCHED ON. ALWAYS SWITCH THE 9845C POW-
ER SWITCH TO THE OFF POSITION BEFORE CONNECTING
THE 98770A POWER CORD.
Before applying power to the computer, check the following items:
• 98770A is properly installed.
• Voltage selector switches set properly on both display and mainframe.
• Proper fuse installed in both display and mainframe.
• Power switch set to off.
• Power cords connected to both display and mainframe.
Switch the
power switch on. After a 20-second (approximate) warmup time, the message
"9845 READY FOR USE" will appear on the CRT display, followed by the blinking cursor.
Adjust the intensity control located
beneath the lower left corner of the CRT bezel for the
desired display intensity. Ifthe turn-on memory test
fails, "PART OF MEMORY FAILED SELF-
TEST" is displayed.
I

2-2 98770 Environmental/Installation/PM
Preventive Maintenance
Clean the case parts and tube face occasionally with mild soap and water or alcohol. Do not use
harsh, abraSive,
or other general purpose cleaners. Use care to assure that no liquid gets inside
of case.
A6
Test
Switch
Figure 2-1. 98770A Back Panel
AC Power
Connector
Voltage
Selector
Switches

98770 Configuration 3-1
Chapter 3
Configuration
Base Configuration
The following assemblies must be installed in the 9845C base to support the 98770A. (These
parts are included in the 98771A Upgrade
Kit.)
98770-65501 Color graphics ROM
1818-1208 Mainframe ROM
1818-1209 Mainframe ROM
98780-65501 Enhanced graphics ROM
1818-1591 Mainframe ROM
or for either
98770-66534 Alpha control assembly
(replaces
09845-66503 in Mainframe)
1818-1592 Mainframe
ROM
See the 98458 CE Handbook Chapter for locations of these parts.
Interfacing
The 98770A interfaces to the 9845C 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:
(requires I/O
ROM installed in mainframe)
STATUS 13;A
DISPA
15 14 13 12 11
10101001
10 9
o 0 8 7 6 5 4 3
o I 011 I 0 0 o 0
1= Interrupts enabled
o= Interrupts disabled
0= ID Bits
1
=ID Bits
2 1 0
o I Oil II 0[, ~ Soft Key
Interrupt
1 = Light Pen
Interrupt
I

3-2 98770 Configuration

Check
[s the base operating?
(Try PR[NTER [S 0
PR[NT "HELLO")
[s there any display?
Adjust intensity control.
Press control-stop
[s there a cursor?
Check voltage select switches,
fuse, and line power.
Still no display?
98770 Troubleshooting 4-1
Chapter 4
Troubleshooting
Initial Checks
Action
Yes -Proceed with [nitial Checks.
No - Fix base.
Yes -Proceed to Raster Checks
No -Proceed with [nitial Checks.
Yes -Proceed to Raster Checks.
No -Proceed with [nitial Checks.
Correct any fault.
Proceed to Inoperative Unit Checks.
Inoperative Unit Problem Chart
(Remove top cover.)
Symptom
Fuse keeps blowing.
Neither back panel fan runs.
Fan above voltage selector switches doesn't run.
Probable Cause
Fault in: Power Supply
Rear Panel Assembly
Transformer
Spark Gap
Fault in: Rear Panel Assy
Turn-On Relay
Transformer
Fuse located below power
supply (early units only).
Fault in: Power Supply or other
area of unit. (See Power
Supply Indicators)
Fan
Proceed to Inoperative Unit Problem Chart -
Power Supply Indicators.
I

4-2 98770 Troubleshooting
Inoperative Unit Problem Chart
Power Supply Indicators
Located on top left side of 98770 as you face front of display. See Page 9-8 this handbook.
Left
1
2
3
4
S
6
7
8
RIGHT
2
3
4
Left
Group Right Group
o
3 4
Normally all off
Indication
8 4
Normally 1, 2, 3 off, 4 on
Cause
-80V overcurrent.
High Voltage, A44,
AS, A6
-80V overvoltage.
A44,
AS, A6, High Voltage
+/- lSV or +/- 2SV overvoltage.
AS,A44,A3,A2,A6
+12V overvoltage.
A44,AS
AS Heat Sink over-temperature.
AS, defective fan, blocked air inlet.
Switching transformer primary overcurrent.
-S.2V overvoltage.
AS, A6, A32, A13 (A33,AS3,AS4), Light Pen
A2
+ SV overvoltage.
A32, A11, A13 (A33, AS3, AS4), A6, A2
Linear 2 Switching Regulator inhibited.
AS, Power Supply
Linear 1 Switching Regulator inhibited.
Power Supply
Logic Switching Regulator inhibited.
Normally
on to indicate +i - lSV INT is pre-
sent.
If off, power supply is inhibited.

Inoperative Unit
(Remove top cover)
I CAUTION I
98770 Troubleshooting 4-3
BEFORE REMOVING OR INSTALLING ANY tl,SSEMBLY DIS-
CONNECT UNIT FROM POWER SOURCE
BY REMOVING POW-
ER CORD FROM BACK OF UNIT.
Note
As viewed from rear of unit the left-hand fan is ac powered, the
right-hand fan
is de powered.
Turn Unit ON
If no display, then observe Power Supply Indicators. See page 4-2.
Observe the fans.
If the ac fan (left-hand) is not turning, check:
a. Fuse
b. Power source (wall connector, power cord, etc.)
c. Computer (use the turn-on fixture)
d. Primary wiring
Note
If the ac fan starts turning as soon as the power cord is connected.
the
power-on relay controlling it may be stuck closed.
If the ac fan is turning but the dc fan (right-hand) is not, check:
1. Number 4 LED in the right indicator group. If lit (brite), power supply is functional. Skip
to
Step 2.
2.
If off (dark), Power supply is not powered or inoperative. Replace power supply and AS
assembly and do this section again. (see AS and power supply procedure See Page 4-S. )
Check Which LED's Are Lit
The following list is for Left indicator group of LED's unless otherwise stated.
LED #1 Lit
- SO Volt supply overcurrent.
1. Unplug power cord.
2. Disconnect high voltage assembly.
3. Plug
in and turn on (no display will be visible).
a.
All LED's dark, unplug power cord and replace H.V. assembly.
b. LED #1 still ON, unplug and remove A6 board.
4. Plug
in and turn on.
a. All LED's dark, unplug power cord and replace A6 board.
b. If LED #1 still lit. go to minimum configuration tests See Page 4-S.
LED #2 Lit
- SO Volt supply overvoltage.
1. Unplug power cord
2. Replace AS and Power supply.
(See
AS and Power Supply procedure See Page 4-S.)
3. Plug in and turn ON. (no display will be visible). If LED #2 still lit, go to minimum
configuration tests
See Page 4-S.

4-4 98770 Troubleshooting
LED #3 Lit
± IS or ± 2S Volt Supply overvoltage.
1. Unplug power cord.
2. Do
AS and Power Supply procedure See Page 4-8.
3. Plug in
and turn ON. If LED #3 still lit. go to minimum configuration tests.
LED #4 Lit
+ 12 Volt Supply overvoltage.
1. Unplug power cord.
2. Do
AS and power supply procedure See Page 4-8.
3. Plug in
and turn ON. If LED #4 still lit, go to minimum configuration tests.
LED #5 Lit
AS heatsink temperature higher than 100° C.
1. Check air flow of internal fan (near bottom of heatsink) by holding hand above AS heat
sink.
2. No air flow. Unplug
power cord.
3.
Remove AS and try to rotate fan by hand.
a.
If frozen (will not rotate), replace fan.
b. If it spins, disconnect the fan and check the voltage at the connector (2S Vdc). Check
the wiring to fan. See Page 9-3, 9-4, 9-S.
4. Do AS and power supply procedure See Page 4-8.
S. Plug in and turn ON. If LED #S still lit, go to minimum configuration tests.
LED #6 Lit
Switching transformer primary overcurrent.
1. Unplug power cord.
2. Replace
power supply.
LED #7 Lit
-S.2 supply overvoltage.
1. Do AS and power supply procedure. See Page 4-8.
2. Go to minimum configuration tests, Page 4-S.
LED #8 Lit
+S Volt supply overvoltage.
1. Replace AS board. See Page 4-8.
2.
Go to minimum configuration tests. See Page 4-S.
Right Indicator Group
LED #1 or #2 or #3 lit.
1. Replace Power Supply.
a. Do AS and Power Supply procedure See Page 4-8.

98770 Troubleshooting 4-5
Minimum Configuration Tests
Use this procedure when the unit has an inoperative power supply or will not indicate the
presence of ± 15 Volts dc, or when primary wiring defects are suspected.
Minimum Configuration
Minimum configuration consists of:
1. Base assembly and mother board.
2. Power supply and primary wiring.
3.
A5 board (98770-66505).
4. A44 board (98770-66544).
5. Turn on fixture or installed on Computer.
I CAUTION
DO NOT RUN UNIT IN MINIMUM CONFIGURATION FOR MORE
THAN 30 SECONDS AT A TIME. (MINIMUM PLUS A33 BOARD
CAN
BE RUN INDEFINITELY)
To achieve minimum configuration, remove:
1. The A6 board (98770-66506).
2. The All board (98770-66511).
3. The A32 board (98770-66532).
4. The A33 board (98770-66533/13/53/54).
5. The 98775-66501166504
board if present.
6. Three
503 boards (98770-66503). Note the order of removal to avoid reconvergence.
7. The 502 board (98770-66502).
8. Remove the CRT assembly (be careful to disconnect YOKE wiring
under the CRT).
Preliminary Procedure
Plug unit into power source and listen to "wake-up" sounds as you turn unit on (ignore LEOS
when base is turned OFF):
a. Relay closure click in top.
b. All fans turning.
c. Steady beep from base is normal. There is no handshake.
d. Watch LED's. If any LED lit, do A5 and Power Supply Procedure. #4 LED in right
indicator group normally
lit (brite).
e. Retest. If LED still lit. replace A44 or Mother board (Rare).
f. Unplug unit.
Unit must pass the minimum configuration tests before proceeding to next page.
I

4-6 98770 Troubleshooting
Unit Rebuild
Do minimum configuration tests before proceeding with unit rebuild.
I CAUTION I
BEFORE REMOVING OR INSTALLING ANY ASSEMBLY DIS-
CONNECT UNIT FROM POWER SOURCE BY REMOVING POW-
ER CORD FROM BACK OF UNIT.
1. Install the A33 Board and test run.
a. Pass - Power supply comes up. #4 LED lit. all other LED's dark. no beep from
mainframe.
b. Fail - If any LED lit, except #4, replace A33 board.
c. Test run (repeat Step 1).
2. Install the CRT
and Yoke assembly. Make all connections to Yoke. but do not connect
high voltage.
a. Pass -
Power supply comes up, #4 LED lit, all other LED's dark.
b. Fail- If any LED lit, except #4, replace CRT and Yoke assembly.
c. Test run (repeat Step 2).
3.
Connect high voltage.
a.
Pass - Power supply comes up. #4 LED lit. other LED's dark. listen for HV crackle.
b. Fail -If any LED lit. except #4. replace high voltage assembly.
c. Test run (repeat Step 3).
4. Install the A6 assembly. Install
all mounting screws.
a. Pass -Power supply up. display visible but no horizontal sync. (Retrace lines visible,
convergence close but colors separated. no alpha, no graphics).
#4 LED lit, other LED's
dark.
b. Fail -Replace A6 assembly
c. Test run (repeat Step 4).
5.
Connect Video cable from A33 to A6. Assure that the cable keys mate correctly.
a. Pass -Power supply up. Alpha display. convergence close but colors separated. no
retrace lines. (If retrace visible. recheck cable for proper key.)
b. Fail -Double check cable key. Replace A33 board.
c. Test run (repeat Step 5).
6. Install the
three 503 boards. one at a time (remember the order they were removed in)
a. Pass -Turn on after installing each board.
Pov,;er suppl>-' up. Alpha. convergence close
but colors separated. no retrace.
b. Fail -Replace the 503 board just installed.
c. Test run after each 503 is installed (repeat Step 6).

98770 Troubleshooting 4-7
7. Install the 502 board. Do not connect the cable.
a. Pass -Power supply up. Alpha present. convergence close but colors separated. no
b. Fail -Replace the 502 board.
c. Test run (repeat Step 7).
8.
Connect the cable on the 502 board.
a. Pass -Power supply up. Normal display. convergence close to normal.
b. Fail -Double check the cable. Replace the 502 board.
c. Test run (repeat Step 8).
9. Install the 511 board.
a. Pass -Power supply up. No change in display.
b. Fail -Replace the 511 board.
c. Test run (repeat Step 9).
10. Install the A32 board.
a. Pass -Power supply up. No change in display.
b. Fail -Replace the A32 board.
c. Test run (repeat Step 10).
11. Install the 98775-66501 board (if present).
a. Pass -Power supply up. No change in display.
b. Fail -Replace the 98775-66501 board.
c. Test run (repeat Step 11).
12.
Connect the video cable. Assure that the cable keys mate (if 98775-66501 present).
a. Pass -Power supply up. No change in display.
b. Fail -Replace the cable or the 98775-66501 board.
c. Test run (repeat Step 12).
13. Do complete diagnostics
and alignment.
Return to preliminary checks.

4-8 98770 Troubleshooting
A5 and Power Supply Replacement Procedure
I CAUTION I
BEFORE REMOVING OR INSTALLING ANY ASSEMBLY DIS-
CONNECT UNIT FROM POWER SOURCE BY REMOVING POW-
ER CORD FROM BACK OF UNIT.
Turn OFF and unplug unit.
Replace
both AS and power supply with known good, new assemblies. If unit does not function
properly,
AS or power supply is not the problem. Turn OFF. unplug and reinstall original AS
and power supply. Check out the primary wiring and the mother board assembly. Return to
Inoperative Unit
procedure or Minimum Configuration procedure.
If unit does function. do the following steps:
1. Remove new supply and reinstall original supply leaving new AS installed. Plug in and
turn ON.
a. If unit operates, AS is the problem. Leave new AS in unit.
b. If unit still
does not operate, supply is the problem. Reinstall the new supply. Leave
new AS in unit.
2. Return to Minimum Configuration Procedure.