Troubleshooting guide

Cinematronics Vector Monitor Repair Guide v.1.0
Page 24 of 53
MONITOR ADJUSTMENTS
Cinematronics Monitor PCB
All picture adjustments for a Cinematronics game are made on the monitor itself. There are no
adjustments possible on the CCPU. The graphic above details the adjustment types and locations.
There exists a test pattern in most games that is enabled by dipswitch 7, located at position E2 of
the main CCPU board. The test pattern is for alignment purposes and should be adjusted to fill the
playfield.
Display Monitor Adjustment Procedure
This procedure adjusts the linearity and convergence of the video display.
Test Pattern Adjustment Procedure
(X and Y R/C Time Constant Adjustment or the Inner Ends of X and Y Line Segments.)
(a) Turn the “X” R/C time constant trimpot R209, and adjust the X (horizontal) lines until
the two inner ends of each line segment just meet.
(b) Turn the “Y” R/C time constant trimpot R109, and adjust the Y (vertical) lines until the
two inner ends of each line segment just meet.
(c) The X and Y lines should meet at the center of the TV monitor screen, if not, check the
related display electronics.
(d) The ends of the two “L” shaped line segments around the center of the display must
meet to form a square.