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CSA 803A Service Manual
9Ć13
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 9Ć8:ăA12 Rear Panel Assembly Block Diagram