Service Information
5-11
Table 5-3
Differential and common-mode isolation testing
Test
no.
Differential or
common-mode
test Channels closed
1 Row 1 None
2 Column 1 1!1!1
3 Column 2 1!1!2
4 Column 3 1!1!3
5 Column 4 1!1!4
6 Column 5 1!1!5
7 Column 6 1!1!6
8 Column 7 1!1!7
9 Column 8 1!1!8
10 Column 9 1!1!9
11 Column 10 1!1!10
12 Row 2 1!1!1 and 1!2!1
13 Row 3 1!1!1 and 1!3!1
14 Row 4 1!1!1 and 1!4!1
5.4 Special handling of static-sensitive
devices
CMOS and other high-impedance devices are subject
to possible static discharge damage because of the
high-impedance levels involved. The following pre-
cautions pertain speciÞcally to static-sensitive devices.
However, since many devices in the Model 7012 are
static-sensitive, it is recommended that they all be
treated as static-sensitive.
1. Such devices should be transported and handled
only in containers specially designed to prevent or
dissipate static build-up. Typically, these devices
will be received in anti-static containers made of
plastic or foam. Keep these parts in their original
containers until ready for installation.
2. Remove the devices from their protective contain-
ers only at a properly grounded work station. Also,
ground yourself with a suitable wrist strap while
working with these devices.
3. Handle the devices only by the body; do not touch
the pins.
4. Any printed circuit board into which the device is
to be inserted must Þrst be grounded to the bench
or table.
5. Use only anti-static type de-soldering tools and
grounded-tip soldering irons.
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