Tektronix TM 515 User Manual

Maintenance-TM 515
This instrument
contains semiconductor devices that

Option 5
are susceptible to
damage from static discharge .
Most

This factory-installed
option adds 25-mil
square-pin
semiconductor devices can be
easily damaged by static

connectors
to the interconnecting
jacks at all

pin
discharge when
they are not installed in a circuit and they

rations from pins 14Aand
B through pins 28A and B .
can also be damaged in the circuit
when
a
low-impedance

These pins are installed
for convenient intermodule
path does not exist . Thefollowing
categoriesareespecial-

connections of a
specialized nature . This will keep
the
ly susceptible to
static discharge damage : MOS or CMOS

interface
flexible by making it easy and fast to
change
microcircuits or discreets, linear microcircuits
with MOS

customized wiring using prepared
wires with square-pin
inputs, ECL, Schottky
signal diodes, Schottky TTL, high

receptacles and long-nose pliers or
tweezers . It also
frequency
bipolartransistors, JFETS, linear microcircuits,

protects the circuit board
from damage by repeated
low power Schottky TTL, and TTL .
soldering and
unsoldering of jumper wires .
For more
information concerning this option
see Section 2,
The probability of damage increases
with the level of

Operating Instructions .
static discharge and with the number of times
that the
device is
subjected to a static discharge . The
accumulative
damage may not be apparent for several
months . Levels of
static discharge that can cause
damage varies with device

O
tion 7
types and may be
as low as 100 V or less . The use of
some

P
suction-type solder removers, walking across
carpeted

The
following described bus wires and keys are
added
floors, and other activities in a technical
environment can

to the connector
boards of the TM 515 Power
Module to
develop static
charges
of
thousands of volts .

provide rear interface connections
between the TM 500
Counter Plug-in containing Option
7, the TR 502, and the
SW 503 .
Some precautions against static
discharge damage are :
1 . drain body static buildup
with a wrist braceletthrough a
100
kf2 resistor to earth ground ; 2 . use a grounded
non-
metallic conductive bench top
such as special anti-static
polyethylene sheeting ; 3 . always store and ship circuit
boards and semiconductors in their
original anti-static
type shipping materials
(avoid non-conductive plastic and
styrofoam
material) ; 4 . minimize handling of static
sen-
sitive components and keep component
leads shorted
together when the device is not in the
circuit (handle by
component body, not leads) .
InterconnectingPins
To replace a pin that is
mounted on a circuit board, first
disconnect
any pin connectors . Then, unsolder the
damaged pin
and
pull
it out of the board with a
pair of
pliers . Be
careful not to damage the
wiring
on
the board
with too much heat .
Ream outthe hole in the circuit
board with a0 .031-inch
drill . Remove the ferrule
from the new interconnecting
pin
and press the
new pin into the hole in the circuit
board .
Position
the pin in the same manner as
the old pin and
resolder . If the old pin was bent at an
angle
to
mate with a
connector, bend the new
pin
to
match the associated pins .
3- 6
Bus Wires .
Six-conductor ribbon cable (Tektronix
Part No .
175-0829-00) is used to make bus
connections
between the following
points :
B14 on J10, J20,
and J30
B15 on J10, J20,
and J30
B16 on
J10, J20, and J30
B17 on J10, J20, and J30
B18 on J10, J20, and
J30
A18 on J10, J20,
and J30
Barrier Keys . Plastic barrier keys
(Tektronix Part No .
214-1593-02) are inserted between
pins 21 and 22 on J10,
between pins 23
and 24 on J20, and between pins 17
and
18
on J30 .
Once the above bus connections are made
and barrier
keys inserted, thethree
connectors are system dedicated
and the
three slots should only be used for
system-
dedicated plug-ins .
Cam Switches
Repair of cam-type
switches should be undertaken
NOTE

only by
experienced maintenance personnel
. Switch
alignment and spring tension of
the contacts must be
A pin replacement kit
including necessary tools,

carefully maintained for proper operation
of the switch .
instructions,
and replacement pins is
availablelrom

For assistance, contact your
local Tektronix Field Office
Tektronix, Inc .

or representative .
REV A NOV
1980

Tektronix TM 515 Specifications

General

Brand	Tektronix
Model	TM 515
Category	Power Supply
Language	English