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9-1
' - ---________________ ~llcha9~~1
98760 Diagrams
.
Sweep
Tube Drive
A40
Reset
(Analog) Red
Hsync
Green
Vsync
Blue
Vblank
+75
Digital
Video
A75
+12
Alpha/Interface
A73
75R
+12
-12
+5
Data and Control
+2, +5 +12 ... _ _ _ _ _ ......
Power
+5
+12
Alpha Data
Graphics Data
and Control
Clock and Control
A75 Digital
Video Board
P1
5
6
7
9
10
98760 Block Diagram
Typical Circuit
Between P1 and P2 Pins
:::~:::
...
A~nn_rJL
...
:::
4700
P
]
:::
...
Video
Drive
A42
RGB
Power
Supply
A50
9020 Base
CRT
Motherboard
P2
H Sync
User Intensity Pot
V Blank
User Intensity Pot
V Sync
+ 12 Volt Sense
From Mainframe
Use Intensity Pot
RFI Filter Board 98760-66501
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