GCE VECTREX HP-3000 User manual

G .. C.E. VECTREX SERVICE MANUAL
TABLE OF CONTENTS
I. SPECIFICATIONS ....................................................... 1
11. OPERATING INSTRUCTIONS ............................................ 2
II!. MAINTENANCE AND SAFETY TIPS ...................................... 7
IV. TV
AND RADIO INTERFERENCE ......................................... 7
V. CIRCUIT DESCRIPTION ................................................. 8
VI. DISASSEMBLY .................................................. , ....... 11
A. Back Cover Removal .........................................•.. ,. . .. 11
8. Power Board Removal . : ............................................. 11
C. Logic Board Removal ............................................... 11
O. Power Transformer Removal ......................................... 11
E. Speaker Removal . . . . . .. . . . . . . . .. . .. . . . . . .. . . . . . . . . . . . . . . . . . . .. .. . .. 12
VII.
LOGIC BOARD ADJUSTMENTS ......................................... 12
Logic Board Component Layout ..................................... 13
VIII. POWER
BOARD ADJUSTMENTS ........................................ 15
Power Board Component Layout ...... ,. ............................ 14
IX. CRT /YOKE REMOVAL AND SET-UP ..................................... 16
X. HAND CONTROL OISASSEMBLY ....................................... 16
Hand Control Schematic . . . . .. . .. . .. . .. . . . . . . .. . .. . . . . .. . . . . . . . . . . . . 17
XI. TEST CARTRIDGE PROCEDURE ........................................ 18
XI I. PARTS LIST ............................................................ 22
Xl!
I. BLOCK DIAGRAM ............................................ , ......... 29
POWER BOARD SCHEMATIC ........................................... 30
LOGIC BOARD SCHEMATIC ............................................ 31
PACKAGING .................................... ,, ...................... 32

t
SPECIFICATIONS
VECTREX
is a
self-contained,
microprocessor
based,
Vector
Display,
portable
home
video
game
arcade
with
external
game
cartridge
program
capability.
MPU
68A09
BK
X 8
BIT
DATA·-
16
BIT
ADDRESS
INTERNAL
ROM
2363 8K X 8
BIT
Pl
EASE
NOTE:
INTERNAL
ROM
2114 (2)
1K
X 4
BIT
(ea.)
INTERNAL
ROM
2114
should
read:
EXTERNAL
ROM
(GAME
CARTRIDGE)
8K X 8
BIT
CAPABILITY
INTERNAL
_l3f\l1
2114
CRT:
SAMSUNG
240R840
90
DEG.
DEF.
B&W
VECTOR
DEFLECTION
12
EXTERNAL
GAME
CARTRIDGES
CURRENTLY
1
RESIDENT
GAME
Second
Controller
available
as an
accessory
Game
Cartridges
include
a
screen
overlay.
120V
AC
-60Hz
DIMENSIONS:
9¾
X 11½ X
14%
WEIGHT:
15 Lbs.
-1-
(2)
(2)

11.
OPERATING INSTRUCTIONS
UNPACKING
When
you
remove
your
Vectrex
Arcade
System
from
the
box
you
should
have these items:
Vectrex Arcade System
Console with Built-in
Control Panel Attached
Owner's Manual
r
......
,,.,
I
,
)
!
I
+-•-
,
__
'
j-
i·
.
Owner's Club
Registration Card
~
...
...,...,,.;,,
..
-4
4
◄
n:-~
lnsttuc!"IO\--S
4
v
...........
Screen Overlay
&
Instructions
for
Mine StormT" Game
IMPORTANT:
To
prevent overheating. never block the ventilation openings on
the back orbottom ofthe console. These openingshave been designed to provide
proper ventilation during operation and should not
be
enclosed or covered in
any way.
Before
inserting
the
plug, make
sure
the
console
switch
is OFF.
The
unit
will
work
in any 120
Volt
AC
60
Hz
electrical
outlet.
Using
any
other
power
supply
will
damage
the
unit. As a special safety
feature,
the
plug
is
polarized
so
that
it
will
fit
into
standard
AC
outlets
in
one
direction
only.
If
the
plug
does
not
slip
easily
into
the
outlet,
turn
it
over and insert again.
It's a
good
idea
to
save
the
box
and
styrofoam
inserts
in
case
you
ever need
to
move
or
ship
your
Vectrex
Arcade
System.
-2-

SETTING UP
Vectrex
Arcade
System is designed
for
table-top
use.
For
the
mostenjoyment, select a
location
where
the
screen will be at
about
eye level when
you
are
playing
the games.
A
sturdy
table, desk
or
shelf
is suggested.
Do
not
operate
console
on
a bed, sofa. carpet, etc.
THE
CONTROLS
Control Panel Storage
To
remove
control
panel
from
the storage area
at
the
bottom
of
the
console, press
the
release
tab
and
the
panel will
drop
down.
To
return
control
panel
to
its storage area:
•
Coil
the
cord
once
around
the
joystick
and then on
top
of
the
action
buttons.
•
Slide
the panel
onto
the
tabs
at
the
bottom
of
the
console.
• Flip
up
the
panel
until
it
clicks
into
place.
-3-

l ~~JJ
Reset
Button
Press Outlet
r+/4--+--- for Built-in
to restart --1--1-.--JWi.Jl.H+ff+ilf.+.--
Control
Panel
games.
Outlet for Second Control Panel __ ....,
Second control panel (sold separately)
used in games that
offer simultaneous
two-player game play.
Note: Control panels are detachable.
The plugs fit intooutletsone way only-
do not force them.
Control Panel
Self-Centering Joystick
Directional control for those games in which
direction is a factor. For specific use, refer to
instruction manual and screen overlay for
each game.
Off/On/Volume Control
Turn clockwise to turn on and increase
volume.
---- Connecting Cord
To avoid permanently overstretching
the coi!ed cord,
it should not be pulled
out to itsextremelength for an extended
period of time.
4 Action Buttons
The functions of each button depend on the
game
cartridge being used. For specific uses,
refer to
instruction manual and screen overlay
for each game.
fl]
l\ I\ I\.
\ll'l 1 'I.
Ill . \\
~ ~ ij ij ~ ~ ij U Brightness Control {on back of console)
0
~ Turn clockwise for brighter picture. Turn
counterclockwise to reduce brightness.
For maximum performance, brightness should
!\ ~.
0
., ~ r.i i--- be adjusted so that white dot does NOT appear
II Ii ll II fl I ,n center of screen.
THE CONTROLS
-4-

INSERTING AND REMOVING
GAME
CARTRIDGES
IMPORTANT:
TO
PROLONG
THE
LIFE OF YOUR VECTREX
ARCADE
SYSTEM
AND
PROTECT
THE
ELECTRONIC
COMPONENTS,
THE
CONSOLE
SHOULD
BE
TURNED
OFF
WHEN
INSERT-
ING
ANO
REMOVING
CARTR.IDGES.
TO INSERT CARTRIDGE
• Make
sure
the
console's
power
is
turned
OFF.
•
Hold
the
cartridge
with
the
label side up.
•
Insert
cartridge
carefully
into
the
slot
on the
right
side
of
the
console.
•
Be
sure
the
cartridge
is
firmly
inserted to the
guideline
marked on
the
cartridge.
TO
REMOVE CARTRIDGE
•
Make
sure
the
console's
power
is
turned
OFF.
•
Pull
the
cartridge
straight
out
of
the
slot
•
To
protect
the
electronic
components,
the
cartridge
should
be stored in
the
original
package
or
other
suitable container.
IMPORTANT:
Unlike
a
conventional
TV
screen, the screen
built
into
the Vectrex
console
uses an
advanced
display
technology
to
achieve
brilliantly
clear
images and special visual effects like
rotation
and zooming. Due
to
this
special
display
technology,
it
may appear
that
the
images pulse
THIS
SLIGHT
PULSING
IS
NORMAL
AND
DOES
NOT
INDICATE
A PROBLEM
WITH
CONSOLE.
The
screen overlays
that
are provided
with
each
cartridge
have been
specially
to
virtually
eliminate
the
slight
pulsing.
-5-

INSERTING AND REMOVING SCREEN OVERLAYS
Tabs
TO
INSERT SCREEN OVERLAY
•
Slip
the
bottom
of
the
screen
overlay
behind
the
two
tabs at
the
bottom
of
the screen.
•
Push
the
top
of
the
overlay
down
slightly
using
the
finger
area at the
top
and press against
the
tabs
at
the
top
until
the
overlay snaps
into
place
under
the
tabs.
TO
REMOVE SCREEN OVERLAY
• Place
your
finger
In
the
curved area
at
the
top
of
the
overlay, press
down
slightly
and
pull
the
overlay
straight
out.
• Store
the
overlay in
the
original
package
or
other
suitable
container.
STARTING GAME PLAY
•
Make
sure
the
cartridge
and
screen overlay are inserted properly.
NOTE: A cartridge is
not
needed
to
play
Mine
Storm,
which
is
the
game
built
into
the
console.
•
Turn
the
OFF/ON/VOLUME
CONTROL
to
the
ON
position
(clockwise).
You
will
see
the
Vectrex
title
for
a few seconds,
then
the
name
of
the
game.
•
Adjust
the
volume
control
1o
the
desired
listening
level.
• Refer to the individual game
instructions
for
game play details.
-6-

111.
MAINTENANCE AND SAFETY TIPS
Vectrex Arcade System
will
bring
you
many years
of
fun
and excitement. In
order
to
keep
Veci:rex Arcade System in
good
working
condition,
please remember the
following:
•
Proper
ventilation
is very
important
to prevent overheating.
Never
block
the
ventilation
openings
on
the
back
of
the
console
in
any
way.
There
are alsoventilationslots
on
the
bottom
which
should
not
be
blocked
by
placing
the
console
on a bed, sofa, carpet, etc.
• Be careful
not
to
spiH
liquids
on
the
console, cartridges
or
control
panel and never expose the
unit
to
rain
or
excessive moisture.
If
this
happens,
unplug
the
console,
wipe
the
outside
dry,
and
then
let
unit
air
dry
for
at least 48
hours
before using
it
again.
• Do
not
expose the console,
cartridges
or
control
panel
to
excessive
or
extreme heat. Neverplace
the
unit
near
or
over a radiator
or
heat system.
• Never remove the back
cover
of
the console
or
drop
or
push objects
through
the slots in the
back cover.
This
could
expose
you
to
very
high
voltage.
•
If
the
console
is damaged,
shock
hazard may exist.
If
damaged
or
there is a
distinct
change
in
performance,
immediately
unplug
the console and have
it
checked
by
a
GCE
Authorized Service
Dealer.
• Care should be taken
not
to
drop
the console, cartridges
or
control
panel.
The
console
should
be lifted using
the
convenient handle at the
upper
rear
of
the
console.
• Always
turn
the
power
OFF when the
unit
is
not
in
use and before inserting
or
removing
car-
tridges.
Do
not
plug
into
a
power
source
other
than 120
Volt
AC 60 cycles electrical outlet.
• Clean the screen overlays and
the
exterior
of
the
console
with
a soft,
slightly
dampened cloth.
Before cleaning
the
console, make sure
the
unit
has been
turned
OFF and
the
power
cord
has
been disconnected. Never use a householdcleaner. cleanser
or
sprayon theoverlays
or
console.
IV.
TV
AND RADIO INTERFERENCE
The
Vectrex
console's
electronic
circuitry
generates signals
for
its
own
internal use
that
may
cause interference
to
nearby radio and television receivers.
The
Vectrex console has been
type
tested and is in
compliance
with
FCC Rules Part
15
Subpart
J
for
Class B
computing
devices.
However, interference may
occur
in certain installations.
If
interference does occur,
you
should
try
one
or
more
of
the
following
measures
to
correct
the
problem:
• Reorient the
TV
or
radio antenna.
• Move the Vectrex
console
further
from
the TV
or
radio.
•
Plug
the
Vectrex console
into
a
different
outlet
than the TV
or
radio.
• It
your
Vectrex dealer
or
an experienced
TV/radio
technician
for
additional
suggestions.
booklet
entitled
"How
to
Identify
and Resolve Radio-TV Interference Problems" is avail-
the U.S. GovernmentPrinting Office, Washington, D.C. 20402, StockNo.004-000-00345-4.
'
-7-

V.
CIRCUIT
DESCRIPTION
As a general
description,
the
HP3000
is
a
self-contained
video
game system
intended
for
home
use.
The
system
includes
its
own
9"
B&W
monitor
screen
and
3"
permanent
magnet
speaker.
Plug-in
ROM
type
cartridges
are available
offering
arcade
type
video
and
sound
game play.
No
external TV receiver
hookup
is needed
or
provided
for. A
front
panel
storable
controller
allows
control
over
the
game
via
joystick
and
push
button
action
switches.
For
two
player
operation
a
second
controller
identical
to
the
single
player
controller
is available as an accessory
product.
Both
controllers
attach
to
the
main
game
console
through
nine
wire
coiled
telephone
style
cables.
There
is
a
consumer
power
switch/volume
control
on the
front
panel as well as a gamereset
button.
A
consumer
adjustable
brightness
control
is located on
the
main
console
rear
housing.
For
the
technical
description
which
follows,
the
reader is
encouraged
to
refer
to
the
block
diagram
and schematic.
The
HP3000 is a
microprocessor
based,
vector
scan system
using
a standard
9"
black
&
white
CRT
as its
video
display
device.
The
microprocessor
(MPU) is
the
Motorola
68A09 device.
The
MPU operates at 1.6
MHz
from
a 6
MHz
external Xtal.
An
internal
divide
by
4
circuit
generates
the
MPU 1.6
MHz
"E"
clock
signal used in
the
system.
Program
memory
is stored in
the
8K
x 8
bit
2363
type
ROM.
This
ROM
contains
common
subroutines,
the
"executive"
or
assembler
instructions
plus
one
complete
game.
Two
1K x 4
bit
2114
type
static RAMS
provide
storage
locations
for
data
indicative
of
locations
of
objects,
game
status, and
various
other
information
needed
by
the
microprocessor
during
game
operation.
Peripheral
Interface
Adaptor
(PIA)
Chip,
has
two
8
bit
peripheral
ports
which
interfaces
the
MPU
with
peripheral devices and external signals.
One
of
the PIA
ports
interfaces
the
General
Instrument
AY-3-8912
sound-1.0.
chip
with
the
MPU and also
drives
the
digital
to
analog
converter
chip
MC1408.
The
other
PIA
port
is used as
control
lines
for
the
sound
chip,
selector
control
for
the
multiplex
chip
and as a means
to
read the A/O
comparator
that's used in the
joystick
successive
approximation
circuitry.
Sound
is
either
MPU generated
directly
or
by use
of
the
AY-3-8912
sound
chip.
The
AY-3-8912
sound
chip
is a
programmable
sound
generator
containing
3
tone
generators
and
wave
shaping
circuitry.
This
chip
also has a
single
8
bit
1.0.
port
used
to
read
the
status
of
each
of
the
handcontrollers
4
action
switches.
The
standard
TTL
device
types
74LS00 and 74LS32 are used as
control
line
decoders
to
allow
the
MPU
to
select
the
appropriate
circuit
element
to
be addressed at any
particular
time.
The
analog
processing
section
includes
digital
to
analog
converter
(OAC)
chip
type
MC1408,
dual
4
channel
multiplexer/demultiplexer
chip
type
CO4052, and dual channel
op-amps
types
LF353 and LF347.
OAC
chip
MC1408 receives an 8
bit
word
at
data
terminals
00-07.
DAC
output
(pin
4) is
current
source.
One
section
of
IC LF353 is used
to
change
this
current
to
a voltage representative
of
the
8
bit
digital
word
received
by
the
OAC
chip.
The
LF353
voltage
is
applied
to
an
input
of
the
dual 4
channel
multiplexer
(MUX)
chip
CO4052.
This
same voltage (designated
"OAC"
on the schematic}
is
the
X-axis
drive
signal.
The
CD4052
MUX
chip
serves
two
purposes: it selectively couples,
under
MPU
control,
the
output
of
the
DAC
current/voltage
converter
to
o:,e
of
4 places and is used
to
selectively
couple
the'inputs
from
the
joystick
pots
to
the
voltage
comparator
IC LF353.
-8-

4 places to which the "DAC" signal is coupled by the MUX are:
Y-axis sample and hold IC LF347
The "O" reference charge capacitor
The 2-axis (brightness signal) sample and hold IC LF347
MPU sound resistive matrix
Each of these 4 signals is a voltage value representative of the8 bit DAC input word for that function.
The joystick pot positions aresensed by a successive approximation process. The MUX chip selects
each joystick pot input line and applies it to the plus input of comparator IC LF353. At the same
time the MPU generates digital words that are changed to voltages by the DAC and current/voltage
converter mentioned previously. These voltages are successfully applied to the comparator's
minus input until the MPU generated voltage is equal to the joystick voltage. The MPU then recog-
nizes the digital word representative of the comparison voltage and is able to establish a location
for the joystick pot. The present position for each joystick pot is sensed in this manner. The pot
position information is updated on a regular basis by the MPU.
Returning to the X and Y axis drive signals, these signals are applied to X,Y integrator IC LF347
negative
input pins through series analog switch types 4066B. The "zero" reference signal is applied
to the positive inputs of the integrators. There are also analog switches across the integrator IC
capacitors. The series analog switches are controlled by MPU signal RAMP and the parallel capaci-
tor swrtches are controlled by MPU signal Zero 10. RAMP 10 determines when and for how long
the X and Y axis voltage levels will be applied to the integrator amps. Zero 10 is used to discharge
the X & Y axis integrator caps thus initializing them for the next signal to be integrated.
The outputs of the X,Y axis integrators are coupled through J-FET switches to IC LM379 deflection
amplifiers. The LM379 operates as a voltage to current driver, 1he current through the deflection
coils forming the electromagnetic field which deflects the CRT beam. To protect the CRT from
spot burn in the event of a loss of deflection, the Y axis drive amplifiers output is detected and a
deflection enable/disable signal generated. This signal controls the J-FET switches in series with
the X,Y deflection amp inputs to reduce the scan drive signal in the event of a software or hardware
failure plus discrete transistor type 2SC1921 operates to bias off the CRT.
Conventional full wave rectification and three terminal regulators are used in the low voltage power
supply, A special negative DC source is generated by a voltage double-circuit which is used to
supply a 13V to the DAC chip.
The high voltage is generated via an oscillator, drive transistor and flyback type transformer cir-
cuitry similar to what is commonly used in small black and white TV receivers.
Judicious use of bypass caps, RF filter chokes, ferrite beads, etc., has been used in the design to
control RFI emissions.
-9-

I
....
0
I
f,
!
!
I .
l i,___ -~
I
I~
ft
J
,
JJJ
I
I
f
I I
J I
I r
I I
J
I
I
I
I
I
I
I
I
I
I
/
I
I
I
\(
ITEM DESCRIPTION PART
NO.
BAC"'~ CASE A$SY TCIC039 'I
SCR t'N iBACK TO FRONT CASE ASSY) U0002-2
3 SCREW {BACK TO FRONT CASE ASSYI 1:'0002 3
4
5
G
KNQB CLIP
KNOB, VOUJW( ONibFF
CONTfiO L LH1 A$SY
f
f10NT CASE AiiSY
POVVf:.F-i"PC6 BKACK!:".·f ASSY
SCREW IPWR BRKT TO FRONT CASE!
CABLE ASSY AUDIO
DlGITt,l 'ANAt CC P('.8 HK"< 1 A.SSY
CARLF ASSY, 'JIDED
SCREW iD A Bf1K 1 TO eRONT C.t,,SFI
110010 I
100023-1
990007 1
100009-1
100089-1
1J000,l4
600139-2
1UU0(i9 i
GO{l{J1 31J-1
1JQ()(}4-5
VECTREX EXPLODED VIEW

VI. DISASSEMBLY
A.
Back Cover Removal
1.
Lay
the
unit
on
a mat,
CRT
down.
2.
Remove
5
screws
from
the
back
cover.
3.
Remove
the
back
cover.
B. Power Board
Removal
1.
Remove
all
connectors
{5)
and
HV
lead
from
the
CRT.
2.
Unsolder
three
leads
(2 red, 1
white)
from
the
bottom
rear
of
the
board
at
location
EP104,
105
and
106.
(Note:
Two
of
these
three
leads
go
to
the
on/off
volume
control
switch,
the
white
lead
goes
to
the
power
transformer
(secondary
C.T.}
3.
Unsolder
the
Aquadag
ground
lead
from
the
top
rear
of
the
board.
4.
Unsolder
ground
jumper
(braid)
between
the
logic
board
and
power
board.
5.
Remove
two
small
Phillips
head
screws
from
the
bottom
of
the
board
that
secures
it
to
the
frame.
6.
Slide
board
back
and
remove
it
from
the
frame.
C. Logic Board Removal
1.
Remove
all
cable
connectors
from
the
top
of
the
board
(3).
2.
Unsolder
ground
jumper
between
the
logic
board
and
power
board
at the
logic
board
(left
side).
3.
Unsolder
and
remove
the
3
power
leads
at
the
power
board,
EP104, i 05
and
106.
Unsolder
2
of
these
leads
(red)
plus
2
from
the
power
transformer
on
the
back
of
the
on/off
switch.
4.
Remove
the
logic
board
mounting
frame
which
includes
the
speaker,
power
transformer
and
reset
buHon
by
removing
retaining
screws
that
hold
the
frame
to
the
front
cover.
There
are
two
screws
located
just
above
the
power
transformer
bracket
that
must
be
removed
also.
5.
Remove
the
logic
board
mounting
frame.
6.
Unsolder
the
leads
on
the
reset
button.
7.
Remove
the
retaining
hardware
on
the
front
of
the
volume
control,
on/off
switch.
8.
Remove
4
small
Phillips
head
screws
on
the
top
of
the
logic
board
that
hold
the
board
to
the
frame.
One
of
the
screws
holds
the
plastic
game
cartridge
guide
to
the
logic
board.
Remove
the
guide.
9.
Remove
the
logic
board.
D. Power Transformer Removal
MAKE
SURE
A/C
CORD
IS
UNPLUGGED
FROM
ALL
POWER
1.
Remove
the
small
screw
holding
the
fuse
cover
and
remove
the
cover.
2.
Remove
the
screw
in
the
center
of
the
Fuse
PCB
and
remove
the
PCB.
3.
Unsolder
the
2
power
and
two
primary
leads
from
the
fuse
PCB.
4.
Unsolder
and
remove
2 red leads
from
the
on/off
switch
mounted
behind
the
volume
control.
5.
Remove
the
splice
on
tile
white
lead
(secondary
C.T.).
6.
Remove
the
two
screws
holding
the
power
transformer
to
the
frame.
Note
the
ground
lead
on
the
right
hand
screw
(as
viewed
from
the
rear)
has a
ground
lug
on
it.
(See Page
12
for
Illustration)
-11-

POWER TRANSFORMER WIRING DIAGRAM
E. Speaker Removal
Follow steps 1 thru 7 under "Logic Board Removal."
1. After the frame is out, remove 2 small screws from the top of the speaker grill on the front
of the frame. Lift up and out on the speaker grill. The speaker and gril I will come out as one.
2. Unsolder speaker leads, note colors on+ and - terminals and the position of the terminals
in relation to the speaker grill and frame. It must be replaced the same way for lead routing.
3. Loosen retaining clip holding the speaker in.
4. Gently slide the speaker out of the two plastic retaining lips and remove. Rough handling
at this point will break these two plastic retaining lips and cause problems in securing
another speaker in the assembly.
vn. LOGIC BOARD ADJUSTMENTS
{See Test Cartridge Procedure, Page 18)
After the Logic Board has been replaced and installed in the VECTREX, the following adjustments
must be made.
A. Initial Power-up -Install Test Cartridge
1. Plug the unit in and turn it on, volume as required. The CRT should display GCE title
page
and introductory tune should occur within fifteen (15) seconds of power-up. This
should be followed by the test cartridge's title page.
B. Select ;'DAG Zero Test." These words will appear on the screen followed by ablank screen,
the actual adjustment must be made during this blank screen interval. It wiil cycle back and
forth between the word display and blank screen.
-12-

'
.....
(,>
I
§
U29
R330
R207
40
I
~
l
1003
LOGIC BOARD COMPONENT LAYOUT

T512
I
: ~..,
I C>
l ""
I C
I
I I
POWER BOARD COMPONENT LAYOUT
39P876
1P6591
2

Set your scope on "DC" and the 5mv/div scale. Connect the ground lead to ground on the
board and conneci the probe to pin 1 of IC 304, adjust R302 "DAC OFFSET" POT for OVDC.
After the adjustment is completed, press the reset button.
H may now be necessary to recenter the picture as the DAC zeroing will affect it. Use the
centering magnets on the rear of the deflection yoke and the "Linearity Pattern" in the test
cartridge to set the centering. UNDER NO CIRCUMSTANCES IS R302 "DAC OFF-SET"
TO BE USED TO HELP CENTER THE PICTURE.
C. Integrator Off-Set Test
Select the "Integrator Off-Set" test Alternately adjust R333 "Y Rate Off-Set" and R335 "X Rate
Off-Set" POTs to align the cross bars for intersection at the center of the diamond patterns.
The bottom row of diamonds is the most critical and should be used to set these controls -
all patterns should be within one (1) line width.
D. Sound Test
Select the "Sound Test." The display will say "CHANNEL A." You should then hear the
sound start at a low frequency and increase in frequency. CHANNEL Band CHANNEL C
will follow with identical tones.
The next title on the CRT will be "NOISE ALL CHANNELS" and this will be noise {static)
The screen will remain blank and two (2) tones will be heard. This is the "CPU SOUND"
check. If any are missing the board must be repaired.
VIII. POWER BOARD ADJUSTMENTS
After installation of the Power Board Assembly make the following checks and, if necessary,
adjustments.
A. Install the Test Cartridge and turn the VECTREX on. The GCE title page on the CRT and the
introductory tune should occur within 15 seconds.
B. Tum the brightness to minimum (R509) and measure the high voltage; it should be 5.8KV+/-
150VDC.
C. To adjust the high voltage, connect an oscilloscope to T502 pin 7 and set the vertical at
20V /div and the horizontal at 10 usec/div.
-15-
0
0
00

O.
Adjust
R526
for
minimum
ringing
in
the
displayed
wave
form.
E.
Recheck
the
H.V. and
adjust
R525
to
get
proper
reading
(5.SKV+/-
105VDC).
F. Repeat
the
adjustments
of
these
two
controls
until
proper
high
voltage
and
minimum
ringing
are
obtained.
G. Deflection Protect Circuit Check (Beam Cut Off)
Select
the
"Beam
Cut
Off"
Test.
Observe
CRT
monitor.
The
pattern
will
shrink
in size,
then
disappear.
In
approximately
2-3
seconds,
the
pattern
will
reappear
at
about
half-size
and
continues
to
increase
in size
and
brightness
until
it is
full-size,
then
the
cycle
will
repeat.
As the
pattern
decreases,
the
circuit
time
constraints
prevent
the
protect
switches
from
activating.
When
the
circuit
allows
the
switches
to
activate,
they
will
not
turn
on
until
the
brightness
and
deflection
reach
the
design
limits.
This
is
when
the
pattern
reappears
at
about
half-size.
H. Audio Amp.
Check
Select
the
"Sound
Test"
and
with
the
volume
control
set at
mid-range,
monitor
the
audio.
Sound
chip
channels
A,
8,
C,
and
CPU
sound
test
signals
must
be
audible
with
no
notice-
able
distortion.
IX. CRT/YOKE REMOVAL AND SET-UP
CRT
removal,
replacement
and
set-up
is
the
same
as
most
B/W
TV
tubes
in
most
respects.
The
primary
difference
is in
the
centering
technique.
After
the
CRT/yoke
has been
installed,
do
a
preliminary
centering
using
the
test
cartridge
linearity
pattern
for
a
display
and
the
centering
ring
magnets
on
the
yoke.
The
next
step
is
to
set
the
"DAC
ZERO"
as
directed
in
Paragraph
11
of
the
LOGIC
BOARD
ADJUST-
MENTS.
After
that
is
completed
again
recenter,
if
necessary,
with
the
ring
magnets
on
the
yoke.
Adjust
vertical
and
horizontal
height
so
the
linear
lines
are
at
the
top
and
bottom,
left
and
right
edges
of
the
CRT
and
front
cover.
Also
see R401
and
R408.
X.
HAND CONTROL DISASSEMBLV
A.
Remove
the
Hand
Controller
cord
from
the
port
in
the
Vectrex.
8.
Remove
the top inlay
by
inserting atool
between
it and the
case (use
extreme
caution
not
to
injure
yourself)
and
pry
up
one
edge.
Discard
the
tool
and
pull
the
inlay
off.
C.
Remove
the
five
(5}
screws
and
remove
the
top
cover.
D.
The
P/C
Board
can
be
removed
by
taking
out
the
screen
in
the
center
of
the
P/C
Board.
E.
The
buttons
and
pad
will
then
be
easily
removed.
-16-

W33
31
~
r /
JS601',,.
lx
I
6 -
~
B' A B s-
A y
®
VR-Y~
-<::::>-
VR-Y
VR-X AE,03
G G
®
0 y 8 -
R601
R603
L,.7K
L,.7
K CONTROL
BOX
P.CB
.
(BO
TT
OM
SIDE)
0 +sv
®
-
5V
@ 0
GND
CONTROL CABLE ·
d
cJl
d
cJl
A
i;:zzz:.
I
JOY-STICK
CONTROL
....
-..J
r J I
I
<D
0
CD
0
@
0
©
-~CONTROL
CABLE
PLUG
PIN
NO.
CONTROL
BOX
CONNECTION
CONTROL CABLE
COLOR
TO
CONTROL
P.C.B
.
PIN
NO.
WHITE
PIN
6
'-'PL=U,,__,G
'-=
CO,::..:N-=..:N~E::..:C:c_.:T_!CIO,::..:Nc:..----1~~
~
9
~
BROWN PIN 5
GRAY
PIN 7
BLUE PIN 9
BLACK PIN 8
GREEN PIN 1
YELLOW
PIN 2
ORANGE
PIN 3
RED
PIN ,.
HAND
CONTROL
SCHEMATIC

XI. TEST CARTRIDGE PROCEDURE (REV 4)
Install Test Cartridge
Turn unit on after VECTREX announcement
Title page
then
Linearity Pattern
Check for:
1. Pin Cushion
2. Barreling
3. Keystone
4. Vertical Size
5. Horizontal Size
6, Centering
r
'I
'
'
i
:
~
The next test will have the words "Adjust DAC Offset" followed by a blank screen. This is an Oscillo-
scope Procedure and should be bypassed by pressing Button 3 or 4 twice in rapid succession.
NOTE: The DAC offset test cannot be escaped from via the controller keys unless the words
"ADJUST DAC OFFSET" are on the screen. The words reappear for a short period every
6 seconds. Reset will allow escape at any time.
Good
Bad
All lines must meet and be continuous.
-18-