Kaypro 2 - 07-04.TIFF

7.3 VIIEO SIQiALS, CN KAYPRO MIUNBCNID
Below is a list of the video signals on cormector Jl of the mainboard and the
voltages on the video board. Repeated removal and installation of the video
board cormector will loosen the cormection and produce poor contact.
Mal functions due to a loose cormector can be very di fficul t to trace.
Video comes from the main board as separate signals, not as a composite like a
'IV signal.
A simple check fur l2V on the video board is to turn the BRIGHINFSS pot up,
then turn the rear panel brightness control down. If l2V is present on the
board, you should be able to see the raster lines on the screen.
video signals Q'l nain board at Jl
pin 1 - fbrizontal Sync.
pin 2 - Key
Pin 3 - Video
pin 4 - Vertical Sync.
Vo1tages Q'l Video Board
Pin 1 -> 0v'
Pin 6 -> 0v
pin 7 -> l2v
Pin 8 -> 0v
Pin 9 -> 4v approx. (this voltage controls brightness)
Pin 10 -> 0v
7-4