(
(
(
CE
General Logic Probe
(Part
453212)
The universal logic probe provides a visual indication
of
a line level. The probe can also be used
to
detect
pulses and
as
a babysitter. (Refer
to
handbook that
comes
with
probe.)
Probe UP and DOWN lights will momentarily
flash on during power up
if
the probe is
connected
to
its machine power source.
Please ignore.
Indicator
Lights
------
UP indictes an up level
(+).
DOWN indicates a
down
level (-).
A pulsing line is indicated by
both lights being on.
Both lights are
off
if
the line
level is from
+1.0
Vdc
to
+2.0
Vdc
for
MULTI logic setting.
Safe Operating Ranges:
MULTI +60.0V
Logic
MST
2/4
+14.0V
Selector
MST
1 +14.0V
Voltages greater than the above
ranges will damage the probe.
povverLeads----
____
==~:;==============~~~~~~
CAUTION
Improper connection
of
the power lead
might
cause the
probe
to
malfunction.
Connect the black
(-)
lead
to
M2D08
(gnd). Connect the
other
(+)
lead
to
M2D03. A voltage difference
of
4V
to
12V is needed
to
power the probe,
with
the black lead
always the
most
negative. For the 5103 Printer, connect
the black
(-)
lead
to
test point G6 (gnd) and connect the
other
(+)
lead
to
test
point
V4
(+5V). For
the
5106
Auxiliary Tape Unit. connect the black
(-)
lead
to
A
1-A4D08
(gnd) and connect the other lead
to
A
1-A4D03
(+5V).
Note: Power
for
the probe can be obtained from any
of
the above devices when probing any other device.
Appendix
A
Test
Terminal
The line being probed is connected
to
this terminal. (Various probes may
be attached, other than the one
shown,
to
aid in probing.) Do
not
use
tip
longer than 3 inches (76.2 mm).
Ground
Lead
Connect this lead
to
any signal ground
near the probe point. Do
not
use
frame ground.
CAUTION
Improper indications result
if
this
lead is
not
connected
to
signal
ground. A maximum length
of
4
inches (101.6 mm) can be used.
Logic
Selector
(TECHNOLOGY)
•
51
00:
MULTI
Selects the type
of
logic
to
be
probed. Circuits probed in the
5100 Portable Computer require
the MULTI setting.
LATCH
Svvitch
• 5100: NONE
Allows the probe
to
be used as a
babysitter. The up position allows
latching the UP light on a positive
pulse. The
down
position allows
latching the DOWN light on a
negative pulse. NONE position
resets the lights and prevents any
latching action. This position is
used
for
most probing in
the
5100
Portable Computer.
GATE
REF
Volts
Svvitch
• 5100: GND
This switch affects only the gating
terminals and is
not
required
for
probing the 5100 Portable Computer.
GATING
Terminals
These terminals are
not
required
for
probing the 5100 Portable
Computer.
CE General Logic Probe (Part
453212)
A·3
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