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CSA 803C Service Manual
3
Horizontal
Sweep
Circuit
HĆSIZE Adjustment
HĆPOS Adjustment
HĆLIN Adjustment
VERT SIZE Adjustment
VERT POS Adjustment
Raster Scan CRT
High and
Grid Voltage
Generator
A7 CRT
Socket Board
(See
Figure 9Ć5)
Vertical
Sweep
Circuit
Synchronization
Grid
Bias
Red
Green
Blue
RED Adjustment
GREEN Adjustment
BLUE Adjustment
From A15
MMU
Beam
Current
Limit
16kV
SCREEN, FOCUS
Red
Green
Blue
SCREEN
FOCUS
Coils
Coils
Heater
Degauss
Figure 9Ć6:ăA8 CRT Driver Board Block Diagram
J78
GPIB Req
-GPIB Gr
RPD0-D7
RPA1-A4
-GPIB Sel
GPIB Clk
-RP Reset
GPIB
Controller
DO0-DO7
T6
Control Signal
Control
GPIB
Control
Buffer
LED A
GPIB
Control
Buffer
-Standard RS
Standard
RSĆ232ĆC
Controller
Reset
Inverter
GPIB Interface
J50
RPD0-D7
RPA1-A4
RSĆ232ĆC
Transceiver
Buffer
J51
RSĆ232ĆC
Transceiver
Buffer
Standard RSĆ232ĆC Interface
Clock
Generator
Reset
Hi
Low
-Printer Select
Printer
Controller
Data
Buffer
J111
Data
Buffer
Printer Interface
Port A
Port B
N/T
Data
Buffer
Port C
RPD0-D7
RPA1-A4
Figure 9Ć7:ăA12 Rear Panel Assembly Block Diagram