Repair manual

2-17
THEORY OF OPERATION
Figure 2-3. Logic Controller P.C. Board Simplified Block Diagram
128K
VRAM
(Optional)
128K
VRAM
512K
DRAM
(Optional)
128K
DRAM
Address
Latches
128K
EPROM
CPU
Video
Generation
HSYNC
Generation
Luminant
D/A
Vertical
Deflection
D/A
Connector
SCSI Board
Data
Address
Buffers
Centronics
Interface
Centronics
Connector
RAM Address
Multiplexer
Monitor
P.C. Board
Camera
Back
Filter
Wheel
Photodiode
Autoluma
A/D
Stepper
Motor
Drive
Camera
Back
Control