Circuit
Description—7623/R
7623 Service
Readout
Shut
Down Circuit
The
readout
intensity is controlled by R120B
(READOUT).
The readout intensity control is in the
collector circuit
of Q1724; when Q1724 is on, the control
will
affect
the
readout display intensity. The readout is not
turned
on until GT time or after the sweep. The readout
display is
turned
off when an erase cycle is started by pulse
QF.
If
the SAVE, INTEG, or MULTI-TRACE
button is
pressed,
the collector
circuit of
Q1724 is interrupted,
and
no current goes
to the
readout circuit. See Fig. 3-41 Basic
block diagram
of the
Readout Shut Down circuit.
Persistence
Pulse
and Pump
Pulse
Generator
Circuits
The oscillator
is Q1552, a programmable unijunction
transistor.
The timing components are
resistor R1551 and
capacitor
C1551.
The pulses are connected to the
base of
transistor
Q1555 and Q1557 to form a comparator circuit.
The setting
of
the
pump pulse-width adjustment determines
when
Q1555
will turn
on with an incoming
pulse. At QT
time,
transistor
Q1554
is
turned on, shorting the
pump
pulses
to ground.
Fig. 3-41. Basic Block Diagram of the Readout Shut Down Circuit.
3-54
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 ...