Circuit
Description—
7623/R7623
Service
Fig.
3-6.
(A) Logic
diagram for Vertical Chopped Blanking stage, (B) Table of input/output combinations for Vertical Chopped Blanking stage.
pulse
produced by the Clock Generator stage
provides the
timing
signal for this stage. A logic diagram of the Chop
Counter,
identifying the
inputs and outputs, is shown in
Fig. 3-7.
The
Chop
Counter stage consists
of integrated
circuit
U123,
a
dual
D-type flip-flop with direct-set, direct-clear
inputs
(see
Table
3-1 for operation of D-type flip-flop). As
connected
in this circuit,
these D-type flip-flops operate as
triggered
(toggle) flip-flops.
The
two-megahertz clock pulses from the Clock
Gen
erator stage
are connected to the trigger (T) input
of
U123B. As
connected,
U123B changes output states with
each
positive-going Clock pulse, and the signal at its
"1"
output
is
a square wave which switches between the HI and
LO
levels
at a one-megahertz rate.
This signal is connected
to
the
Vertical Mode Control stage to provide the Vertical
Mainframe
Chop Signal. It is also connected to the trigger
input
of U123A. U123A also changes output
states with
each
positive-going
pulse at its trigger input to produce a
500
kilohertz
square wave at its "1" output. The output
from
U123A provides the Vertical Plug-In Chop Signal to
3-12
Summary of Contents for 7623
Page 1: ...MANUAL 7623 R7623 STORAGE OSCILLOSCOPE SERVICE MANUFACTURERS OF CATHODE RAY OSCILLOSCOPES ...
Page 51: ...Fig 3 2 Block diagram of Logic circuit Circuit Description 7623 R 7623 Service ...
Page 72: ...W NJ 00 Fifl 3 22 Low Voltage Power Supply detailed block diagram ...
Page 73: ...Circuit Description 7623 R 7623 Service ...
Page 74: ...CO NJ CD Fig 3 22 Low Voltage Power Supply detailed block diagram cont ...
Page 75: ...Circuit Description 7623 R 7623 Service ...
Page 97: ...Circuit Description 7623 R7623 Service 3 51 ...
Page 98: ...Circuit Description 7623 R7623 Service Fig 3 39 Output Pulses for the Storage Circuits 3 52 ...
Page 103: ...Circuit Description 7623 R7623 Service 3 57 ...
Page 108: ... Ç À Fig 4 2 Location of circuit boards in the 7623 ...
Page 109: ...Fig 4 3 Location of circuit boards in the R7623 Maintenance 7623 R 7623 Service ...
Page 113: ...Maintenance 7623 R7623 Service Fig 4 6 Circuit Isolation Troubleshooting Chart 4 9 ...
Page 165: ...7623 BLOCK DIAGRAM ...
Page 166: ...7623 R7623 Service Front of Board ...
Page 167: ......
Page 168: ...FL ...
Page 169: ......
Page 173: ...7623 Logic ...
Page 175: ...Vertical Interface A4 ...
Page 178: ...Vertical Interface ...
Page 180: ...Vertical Amp A5 ...
Page 184: ...Horizontal Amp A6 ...
Page 186: ...7623 TO P450 VERT AMP 3 HORIZONTAL AMPLIFIER ...
Page 188: ...Output Signals A7 ...
Page 190: ...FROM 7G23 Output Signals g ...
Page 195: ...FROM LV POWER SUPPLY 7623 CRT CIRCUIT ...
Page 197: ......
Page 200: ......
Page 202: ...Storage Output A14 ...
Page 204: ......
Page 205: ...7623 R7623 Service Fig 6 14 A15 Cal Storage circuit board ...
Page 208: ......
Page 209: ...7623 R7623 Service Fig 6 15 A16 Readout System circuit board ...
Page 213: ......
Page 242: ...7623 R7623 OSCILLOSCOPE b ...
Page 243: ...151 ...
Page 246: ...20 ...
Page 247: ...7623 R7623 OSCILLOSCOPE 112 ...