Troubleshooting guide

Cinematronics Vector Monitor Repair Guide v.1.0

Page 25 of 53

X and Y Gain Adjustment

Adjust potentiometers R102 and R202 so that all vectors (line segments) neatly intersect.

R102 adjusts the length of all vertical lines. R202 controls horizontal line lengths.

(a) Turn the X gain trimpot R202, and adjust the X (horizontal) lines until the two outer

ends of each X line segments are ¼ inch from the edge of the TV monitor screen.

(b) Turn the Y gain trimpot R102, adjust the Y (vertical) lines until the outer ends of each Y

line segments are ¼ inch from the edge of the TV monitor screen.

of the screen, center the display.

Centering the Display. If your picture needs centering, use the 2 metal rings on the neck of the

tube with tabs on them. They control the screen position only and are used for centering. Each

controls a magnet that will “pull” the picture in the direction the tab points. To move the image to

one side, make the tab on a ring point towards that direction. The 2 rings are used in conjunction to

create varying degrees of pull in a particular direction. To pull the screen as strongly as possible to

a side, point both tabs to that side. If you then adjust 1 ring 45 degrees up and the other 45 degrees

down, you are still pulling in the same direction as before but you are now pulling with ½ the

intensity since the other ½ intensity is cancelled out by one magnet pulling up and the other magnet

pulling down. Turn the two CRT magnet rings, located on the neck of the CRT, until the point

where the X and the Y lines meet is centered on the monitor screen.

Generally speaking, do not touch the yoke adjustment unless you are a qualified TV repair

technician! The yoke should never require adjustment unless the monitor has been installed in a

different type of game or the adjustment magnets have been tampered with. In either case, if the

entire picture appears to be offset, and normal adjusting does not restore it to its proper position,

then you will have to spend some time (a lot of time actually) adjusting the yoke assembly. The

two yoke adjusters are located on neck of the monitor, and they affect the vertical and horizontal

deflection of the electron beam. If yoke adjustment is necessary, follow the instructions given in

the appropriate monitor manual.

Contrast Adjustment. There is no factory supplied contrast adjustment for the Cinematronics

monitor. If you find that the difference in intensities is too great, you can insert a variable resistor

in the intensity network.

Replace R10 (5.6K) with a 5K-ohm potentiometer. This will allow the high-intensity vectors to be

adjusted to an acceptable level.

High Voltage Adjustment

[Can this be done?]

Focus Control Adjustment

[Can this be done?]