Maintenance-7623/R7623
Service
A.
Unsolder all of the power
transformer wires
connected
to
the top of the
board. Use
a vacuum-type
desoldering
tool
to remove the solder from the hole
in the
circuit board.
5. Remove
the screws holding each corner of the board
to
the chassis.
6.
To
replace the Rectifier board, reverse the order
of
removal. Be sure that
all
of the transformer wires are
properly
placed before
resoldering. Match the
arrows on the
multi pin connectors to the
arrows
on the board. Correct
location
of
the pin connectors
and the wire color code is
shown on
the circuit board illustration in the
Diagrams
section.
G. CALIBRATOR
BOARD
REPLACEMENT.
1.
Unsolder
power on/off indicator.
2.
Remove FOCUS,
INTENSITY, BEAM FINDER and
GRATICULE
ILLUM
knobs.
3.
Remove securing
nut
which holds INTENSITY and
GRATICULE ILLUM control
to front panel.
4.
Disengage
the power switch actuating rod from the
coupler.
Remove
the rod and plastic bushing through the
front
of
the instrument.
5.
Remove
two screws holding the VERT MODE switch
to the front sub-panel.
6.
Remove
the screw holding the calibrator board to the
support on the
CRT
shield.
7. Pull
the Calibrator board out far enough
to allow the
multi-pin
connectors and wire leads to be disconnected
from the
Calibrator board (note the wire color code).
8. Remove the board.
9.
To
replace the
circuit board, reverse the removal
procedure. Match
the arrows on the multi-pin connectors to
the
arrows on the
circuit board.
Plug-In
Interface Connectors. The individual contacts of
the
plug in interface connectors can be replaced.
However,
it
is recommended that
the entire Main Interface board be
replaced if
a
large
number of the contacts are damaged. An
alternative
solution is to
refer the maintenance of the
damaged Main Interface board to
your local TEKTRONIX
Field
Office
or
representative. Use the following procedure
to
replace
an individual contact of the plug-in interface
connector.
1.
Remove
the
Main
Interface circuit board from the
instrument
as described
previously.
2.
Snap
the connector cover (white plastic) off the side
of the
plug-in interface
connector which needs repair.
3.
Unsolder and
remove the damaged contact.
4. Install
the replacement contact. Carefully form it
to
the
required
shape to fit against the connector body.
5.
Snap the
connector cover
back onto the plug-in
interface
connector. Check that the
contact which was
replaced
is aligned with the other contacts.
6.
Replace the
Main Interface board.
Access
To
The
Fan
Motor
1.
Remove
the four screws holding the Low-Voltage
Regulator sub assembly to the main
chassis (see Fig. 4-7).
2.
Pull
the Low-Voltage regulator sub-assembly
out
through
the
rear
of the instrument as far as cables will
permit.
3. Remove
the
two screws holding
the motor to the
bracket; be
careful
not
to lose the spacers between the
motor and the bracket.
4.
To
replace the motor, reverse the order of removal.
Access
To
The Fan Motor For
The
R7623
1.
Remove the
eight
screws holding the Signals-Out rear
panel
to the chassis. Pull rear
panel out as far as cables will
permit
(see
Fig. 4 8).
2.
Remove
the four
corner bolts securing the
motor to
the
chassis.
3. To replace
the motor, reverse
the order of
removal.
Fig. 4-7.
Location of screws holding Low Voltage sub chassis.
4-13
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 ...