The Apple Computer outputs a composite video signal (composite of sync and video information) which can be applied to any standard raster-scan type video display monitor. The output level is adjustable with the potentiometer located near the video output Molex connector, J2. The additional two outside pins on the Molex connector supply +5 and +12 volts, to be used in future Apple accessories. The composite video signal can also be modulated at the proper RF frequency, with an inexpensive commercially available device , and applied to the antenna terminals of a home television receiver. Since the character format is 40 characters / line, all television receivers will have the necessary bandwidth to display the entire 40 characters. Two large manufacturers of video display monitors, which connect directly with the Apple Computer, are Motorola and Ball. The mating four-pin Molex connector is provided.
AC Power Sources:
The board, as supplied, requires no more than 1.5 amps DC from the +5V supply, while the regulator is capable of supplying 3 amps. The remaining 1.5 amps DC from the +5V supply is available for user hardware expansion (provided suitable transformer ratings are employed).
A suitable source of the raw AC voltages required, are two commercially available transformers; Stancor P/N P-8380 or equivalent (8 to 10 volts at 3 amps). and Stancor P/N P-8667 or
|equivalent ( ZSVCT at 1 amp).
Simply wire the secondaries to the mating six-pin Molex connector
supplied, and wire the primaries in parallel, as shown in the schematic
diagram (power supply section, Dwg. No. 00101, sheet 3 of 3.
Hit the RESET button to enter the system monitor. A backslash should be displayed and the cursor should drop to the next line.
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