XY Pattern Generator for Arcade Game Vector Monitors Test Pattern Generator VTPG

Description

XY Pattern Generator for Vector Monitor is the updated version of the WICO pattern generator, works with all color and monochrome vector monitors. Six different patterns to adjust your screen by a simple push button.
This is not a monitor. This is a test pattern generator for vector arcade monitors.
SEPARATE RED, GREEN & BLUE BRIGHTNESS ADJUST POTS
X POSITION & SIZE POTS
Y POSITION & SIZE POTS
5VDC WALL ADAPTER INCLUDED
CABLE ADAPTERS FOR 6100, G08 & MONOCHROME MONITORS IS INCLUDED
OPTIONAL USB PORT
The X-Y Pattern Generator was designed as a test instrument to aid in the repair and
alignment of B/W and Color X-Y monitors. This unit cannot be used on Raster scan
monitors. The Pattern Generator comes equipped with pass through cable assemblies to fit
Wells Gardner and Electrohome B/W and color X-Y monitors. The unit can be used on other
X-Y monitors by building your own cables.
This cannot be used on Cinematronics monitors.
The unit is powered by the included 5VDC wall adapter or through an optional USB cable
and a socketed 500ma fuse is provided for circuit protection. +5VDC and GND test points
for scope probes is also provided. There is a single “SELECT” push button which cycles
through the six different display patterns. Adjustment pots for XSIZE, X POSITION, YSIZE,
X POSITION, RED LEVEL, GREEN LEVEL & BLUE LEVEL.
See pic above in gallery
The output connector pictured below.
Pin assignments for the 10 pin output connector is as follows:
1. Ground                                      6. YCTRL (see note)
2. XOUT                                        7. YGAIN(see note)
3. XCTRL (see note)                     8. RED
4. XGAIN (see note)                      9. BLUE
5. YOUT                                       10. GREEN
NOTE
:
When connecting Monochrome monitors X output is on pin2 with 3-4 shorted.
When connecting Monochrome monitors Y output is on pin5 with 6-7 shorted.
When connecting Color monitors X output is on pin2 with 3-4 open.
When connecting Color monitors Y output is on pin5 with 6-7 open.
TESTING YOUR X-Y MONITOR
The Pattern Generator does not provide power outputs to the monitor. The included
pass-thru cables are made so as to allow the games power supply to stay connected
while the generator controls the inputs to the monitor. When testing a monitor check
the power supply FIRST to be sure that the proper voltages are present. Only if the
power supply is verified should the tested be plugged into the monitor. To begin testing
first attach the provided cable that match your monitor type to be tested as shown.
Before powering set the GREEN & RED level pots to the counter-clockwise or minimum
level position and the BLUE to mid level position. This will prevent phosphor burn on a
monitor with defective X & Y deflection circuits. Turn on the power supply or game cabinet
and then plug in the Pattern Generator. The generator defaults to the CROSS pattern on
power up, allow about 30sec for the monitor to warm up.
See pic above in gallery
MONOCHROME XY PASS THRU CABLE SHOWN AS EXAMPLE
POWER UP ADJUSTMENTS
You should see a dim blue CROSS pattern on the monitor. Now adjust the BLUE level
control to both clockwise and counter clockwise positions to verify that the brightness
changes. Now set the BLUE level to minimum and try setting the brightness on the
GREEN & RED controls to see if they function normally.
(NOTE: On a Monochrome monitor only the BLUE level control is functional)
COLOR ADJUSTMENTS
On a color monitor if you set all three colors to the max clockwise position your
monitor should display white lines. You may still see parts of the line separate into
RED, GREEN & BLUE lines. This is due to the convergence of the monitor not being
perfectly aligned. Push the ‘SELECT’ switch to cycle to the different patterns to make
sure that they are all functional. You may notice some “bowing” of the lines especially
on larger monitors. This is because the generator does not have any pincushion correction.
YOKE ALIGNMENT
Set the generator to the horizontal or vertical lines. Test that the lines are not angled on
the monitor. If so the Yoke may have rotated on the neck. See manufacturer’s instructions
for the procedure.
CENTERING
The generator has adjustments for XSIZE, X POSITION, YSIZE and X POSITION
via the four pots. You can use these controls as indicated to center and control the size
of the image so that it fits onto the monitor with no lines going “off screen”