Repair manual

2-4
THEORY OF OPERATION
3. Logic Controller P.C. Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-82
o Microprocessor Control Network/DRAM Memory Sheet 1 2-82
o VRAM Memory Sheet 2 2-83
o Horizontal Timing Down Counter Sheet 3 2-84
o Video Generation and Pixel Clock Sheet 4 2-85
Frequency Synthesizer
o Hardware Control/SCSI Interface Sheet 5 2-86
o Centronics Parallel Port Interface Network Sheet 6 2-87
o Vertical Deflection/Auto Luminance Control Sheet 7 2-88
4. Monitor P.C. Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-89
5. Small Computer System Interface (SCSI) P. C. Board. . . . . . . . . . . . . 2-90