Maintenance
—
7623/R
7623
Service
Ordering
Parts. When ordering replacement parts from
Tektronix, Inc.,
include
the following
information:
1. Instrument type.
2. Instrument serial number.
3. A
description of the part (if electrical, include circuit
number).
4.
TEKTRONIX
part number.
Soldering
Techniques
Disconnect
the
instrument from the power source
before soldering.
The
reliability and
accuracy of this
instrument can be
maintained
only if proper soldering techniques are used
when repairing
or replacing parts. General soldering
techniques
which apply to maintenance of any precision
electronic
equipment should be
used when working on this
instrument.
Use
only 60/40 rosin-core
electronic-grade
solder. The
choice
of
soldering iron is determined by the
repair
to be made. When soldering on circuit boards, use a
35-
to 40-watt
pencil-type soldering iron with a 1/8-inch
wide, wedge-shaped
tip. Keep
the tip properly tinned for
best heat
transfer
to the
solder joint. A higher wattage
soldering iron
may separate
the wiring from the base
material.
Avoid excessive heat; apply
only enough heat to
remove
the component or
to make
a good solder joint.
Also,
apply
only
enough solder to make a firm solder joint;
do
not apply too much solder.
For
metal terminals
(e.g., switch terminals, potenti
ometers,
etc.)
a
higher wattage-rating soldering iron may be
required.
Match the
soldering iron
to the work being done.
For
example, if the component is connected to the chassis
or
other
large heat-radiating
surface, it
will require a
75-watt or
larger
soldering iron. The pencil-type soldering
iron
used
on
the circuit board can be used for soldering to
switch
terminals, potentiometers, or metal terminals
mounted
in plastic holders.
After soldering
is completed, clean the area
around the
solder connection with
a flux-remover solvent. Be
careful
not to remove any information printed in the area.
Component
Replacement
Disconnect the
instrument from the power source
before replacing
components.
General.
The
exploded view
drawings associated with
the
Mechanical Parts List (located at
rear of manual) may
be
helpful
in the removal
or disassembly of individual
components or sub-assemblies.
Circuit
Board
Replacement.
If
a
circuit board
is damaged
beyond
repair, the entire assembly including all soldered-on
components,
can be replaced. Part numbers are given in the
Mechanical Parts List.
NOTE
Even
though unwired boards are
available without
components,
use of the
completely wired replace
ment
board is
recommended due to
the large number
of
components
mounted
on most of the
boards.
Most
of the circuit boards in this instrument are
mounted
on
the chassis;
pin connectors are used for
interconnection
with other circuits.
Use the following
procedure
to remove the chassis-mounted circuit boards
(removal instructions for
the
exceptions will be given later).
A. CHASSIS-MOUNTED
BOARDS.
1.
Disconnect any
pin
connectors
on
the board or
connected
to other portions of the instrument. Note the
order of
these connectors so they can be correctly replaced.
2.
Remove
the securing screws.
3.
Remove
the board.
4.
To
replace the board, reverse the order of removal.
Match
the
arrows on the multi-pin connectors to the arrows
on
the
board. Correct location of the
pin
connectors is
shown
in the
circuit board
illustrations in the Diagrams
section.
B.
TRIGGER
SELECTOR AND VERTICAL INTERFACE
CIRCUIT
BOARD REPLACEMENT.
The
Trigger Selector
and Vertical Interface circuit
boards
plug onto the front of the Main Interface circuit
board.
Use
the
following procedure to replace either board.
4
11
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 ...