Maintenance—
DM 5010
Message
Terminator Switch Setting
The EOI ONLY switch selects the DM5010 message
terminator. For access
to this switch,
remove the instru
ment’s
left side cover. The switch is located on the CPU
board
(A14). Refer to Fig.
7-1. Operation of the DM 5010
with
either switch
position is described in Section 3 under
Messages and Communication Protocol.
Talk Only Switch
Setting
The Talk Only
switch is one of the bank of eight switches
located
on the CPU board (A14).
Remove the instrument’s
left side cover for access
to this switch. Refer to
Fig. 7-1.
Setting
the
Talk Only switch to logic 1
selects the Talk Only
mode.
A
calibration
fixture (Tektronix Part No. 067-1052-00)
contains
a
board extractor for disengaging these boards.
It
also contains two extender boards
designed for operating
boards
outside the instrument.
To
reinstall boards, carefully align the
board edges
in the
guides
attached to the top and
bottom instrument covers.
Press
the board firmly to seat it in the Main Interconnect
board connectors.
When inserting the ADC board, slide the
board in
until the input connectors
contact the
front panel.
From
the front of the instrument, insert
a small screwdriver
into the front panel connector holes and carefully align
the
input
connectors with the holes while maintaining slight
pressure on the back edge of
the board. When properly
aligned, press
the board
in firmly.
Using the
Rear Interface Connections
For
rear
interface connector pin
assignments, see Tables
10-13,10-14,
and 10-15 in the pullout pages of this manual.
Rear-interface
pins 28B (Hi) and 28A (Lo) on the ADC
board (A17) are the input connections for measurements via
the rear
interface.
A negative-going
TTL
signal
may be used to trigger in
strument measurements
via rear
interface
connections to
the Isolation
board (A15). Use of this function requires mov
ing a jumper on
the CPU board (A14). For access to the
jumper, remove
the
instrument’s left side cover. Connect
pins
2 and 3 of J1733 using its EXTRIG jumper, P1733.
Refer
to
Fig. 10-1.
Apply the EXTRIG
signal to the Isolation
board rear interface pins 16A and 16B (Ground).
GENERAL
MAINTENANCE
Rear
Circuit Board Removal
To remove the CPU, Isolation, RMS, or ADC
boards,
turn off the
power module and remove the plug-in. Turn the
two
plastic fasteners
on each side cover and remove the
covers.
Next, remove the four screws on the instrument
back
plate and remove the plate. See Fig. 7-2. Then, re
move
the retainer bar.
Carefully
pull the selected
board to
ward the rear of the
instrument.
NOTE
Before removing
the CPU board, unplug the ribbon
cable
connector
from the Front
Panel Driver board.
Before
removing
the ADC board, remove the screw
on
the
front
pane! between the input connectors.
Fig. 7-2. Backplate and retainer bar removal.
Front-Panel Board Removal
To remove the Front Panel and Front Panel
Driver board
assembly, first remove
the instrument side covers and
back
plate.
Remove the
front panel screw between the input con
nectors
and remove the
ADC board.
Refer to Fig. 7-3. It is
necessary to disengage
the
latch before removing the front
panel boards.
To
disengage the
latch, use a small
screwdriver
to
push forward slightly on the rear
latch (1) just
in
front of the spring. Press down on the latch knob to raise
the latch
knob extension at the point where the two latch
pieces
engage.
While
holding
the
latch knob down, push
up
on the
front panel
latch piece at the point of engagement (2)
to
disengage the two
pieces.
Then,
pull the
latch knob out.
7-2
REV
JAN
1983
Summary of Contents for DM 5010
Page 14: ...DM 5010 2994 00 DM 5010 Programmable Digital Multimeter xii ADD JUL 1986...
Page 27: ...Operating Instructions DM 5010 2994 03 Fig 2 3 DM 5010 front panel controls and connectors 2 3...
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Page 251: ...Section 8 DM 5010 OPTIONS No options are available 8 1...
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Page 272: ...DM 5010 2994 37 Fig 10 2 Location of DM 5010 adjustments and test points...
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Page 337: ...63 REV JUN 1986...
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