Calibration
—
7623/R7623
Service
factor
of the
7A15A so that the markers are about two
divisions
in amplitude.
i.
CHECK-CRT
display
for one marker for each two
divisions over the center eight
divisions.
j. ADJUST-C566, C586, and
C588 (see Fig. 2-6) for
one
marker
each two divisions over the center eight
divisions (use low capacitance screwdriver).
Set C588 to
minimum
capacitance and adjust C566 and C586 equally
for
optimum timing.
If necessary readjust C588.
26.
Check
X-Y
Phase
Shift
a. Install the 7A15A plug-in units
in the left vertical
and
horizontal
compartments.
b.
Set
both 7A15A units for a deflection
factor of 10
millivolts/division with
DC input coupling.
c. Connect the low-frequency signal
generator
to the
inputs
of both 7A15A
plug-in
units with the 42-inch
50-ohm
BNC
cable, 50-ohm BNC termination, and dual
input
coupler.
d.
Set the
low-frequency generator for eight divisions of
vertical
and
horizontal
deflection at
an output frequency of
35 kilohertz.
e.
CHECK-CRT lissajous display for an
opening at
the center vertical line of 0.28 division or
less (indicates 2
degrees
or
less phase shift; see
Fig. 2-7).
f.
Disconnect all test
equipment (leave plug-in units
installed).
Fig. 2-7.
Typical CRT display when checking X-Y phase shift.
c. Set
the
7B53A for auto triggering at a sweep rate of
one millisecond/division (display will
free run).
d.
Connect
the medium-frequency
generator to the
input of
the 7A15A
in the horizontal
compartment with
the five-nanosecond GR
cable and the 50-ohm GR in-line
termination.
e. Set
the medium-frequency
generator for 8 divisions
of
horizontal deflection
at its reference frequency (50
kilohertz).
f.
Without changing
the output amplitude, increase the
output
frequency
of the generator
to 2
megahertz.
y/
27.
Check
Horizontal
Bandwidth
a.
Install
the
7B53A in the right vertical compartment.
b. Set the
VERT MODE switch to
RIGHT.
g.
CHECK—For at least 5.6 divisions of signal ampli
tude.
h.
Disconnect all test equipment and remove the plug-in
units.
2-19
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 ...