Circuit Description—
7623/R7623
Service
Fig. 3-28. Output waveforms
of Timing stage.
Fig. 3-29. Detail of outputs at pins 12, 13, 14, and 16 of U2126.
to
produce a
character. The collector of Q2138 is also
connected
to Character
Generator No. 2,
U2272 through
C2140, CR2140.
This activated
U2272 during the quiescent
period
of the Strobe pulse (collector
of Q2138 negative)
and
diverts the
output current of Row Decoder U2185 to
row 2.
The purpose of
this configuration is to prevent the
Zeros Logic and Memory
stage U2232 from storing
incorrect data
during the quiescent
period of the Strobe
pulse. When
the
Strobe pulse goes positive, CR2140 is
reverse
biased to disconnect Q2138
from U2272 and allow
the Row
Decoder
stage
to operate in the normal
manner.
The
next
signal to be produced is the Vertical/
Horizontal Channel
Switch OFF Command at pin 13. This
positive-going
signal
disconnects the plug-in signals in the
vertical
and horizontal deflection systems
so the
plug-in
units
do
not
control the position of the CRT beam during
the
readout display. The Ready signal derived from this
output
is
connected to the Decimal Point Logic and
Character
Position Counter stage and the Format Generator
stage (see diagram
10).
The
Readout
Intensity output at pin
12 is produced next. This current
is connected to the CRT
Circuit
to unblank
the
CRT to the intensity level deter
mined by
READOUT intensity control R2124. The Char
acter
Scan
ramp at pin 16 started to go
negative as this
3-37
Содержание 7623
Страница 1: ...MANUAL 7623 R7623 STORAGE OSCILLOSCOPE SERVICE MANUFACTURERS OF CATHODE RAY OSCILLOSCOPES ...
Страница 51: ...Fig 3 2 Block diagram of Logic circuit Circuit Description 7623 R 7623 Service ...
Страница 72: ...W NJ 00 Fifl 3 22 Low Voltage Power Supply detailed block diagram ...
Страница 73: ...Circuit Description 7623 R 7623 Service ...
Страница 74: ...CO NJ CD Fig 3 22 Low Voltage Power Supply detailed block diagram cont ...
Страница 75: ...Circuit Description 7623 R 7623 Service ...
Страница 82: ...Ca W G Fig 3 27 Detailed block diagram of Readout System Circuit Description 7623 R 7623 Service ...
Страница 97: ...Circuit Description 7623 R7623 Service 3 51 ...
Страница 98: ...Circuit Description 7623 R7623 Service Fig 3 39 Output Pulses for the Storage Circuits 3 52 ...
Страница 99: ...Circuit Description 7623 R7623 Service Fig 3 40 Basic Block Diagram of the Storage Timing 3 53 ...
Страница 103: ...Circuit Description 7623 R7623 Service 3 57 ...
Страница 108: ... Ç À Fig 4 2 Location of circuit boards in the 7623 ...
Страница 109: ...Fig 4 3 Location of circuit boards in the R7623 Maintenance 7623 R 7623 Service ...
Страница 111: ...Maintenance 7623 R7623 Service Fig 4 5 Electrode configuration for semiconductors used in this instrument ...
Страница 113: ...Maintenance 7623 R7623 Service Fig 4 6 Circuit Isolation Troubleshooting Chart 4 9 ...
Страница 165: ...7623 BLOCK DIAGRAM ...
Страница 166: ...7623 R7623 Service Front of Board ...
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Страница 168: ...FL ...
Страница 169: ......
Страница 173: ...7623 Logic ...
Страница 175: ...Vertical Interface A4 ...
Страница 178: ...Vertical Interface ...
Страница 180: ...Vertical Amp A5 ...
Страница 184: ...Horizontal Amp A6 ...
Страница 186: ...7623 TO P450 VERT AMP 3 HORIZONTAL AMPLIFIER ...
Страница 188: ...Output Signals A7 ...
Страница 190: ...FROM 7G23 Output Signals g ...
Страница 195: ...FROM LV POWER SUPPLY 7623 CRT CIRCUIT ...
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Страница 202: ...Storage Output A14 ...
Страница 204: ......
Страница 205: ...7623 R7623 Service Fig 6 14 A15 Cal Storage circuit board ...
Страница 208: ......
Страница 209: ...7623 R7623 Service Fig 6 15 A16 Readout System circuit board ...
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Страница 242: ...7623 R7623 OSCILLOSCOPE b ...
Страница 243: ...151 ...
Страница 246: ...20 ...
Страница 247: ...7623 R7623 OSCILLOSCOPE 112 ...