Tektronix TM 503 User Manual

System Maintenance—TM 503
c.f os
acre
S38
SSS
i I
ML 5 SU
Plastic-Cased Transistors
See manufacturer's “A Pint
specifications sheet (toput) Pin 2
{Gutput)
Ir = &
hs ¥ / Pin
— (Ground)
Power
Transistors
FET’s
Regulator
(C's
Heat dissipator
{may be applied
to some metal-
cased transistors)
Metal-Cased Transistors
Integrated Circuits
Figure 2. Semiconductor device lead configurations found in the TM 500 family.
Replacement semiconductors should be of the original
type or a direct replacement. Figure 2 shows the lead
configuration of the semiconductors used in this instrument
system. When removing soldered-in transistors, use a
suction-type de-soldering tool to remove the solder from
the holes in the circuit board.
An extracting too! should be used to remove the 14- and
16-pin integrated circuits to prevent damage to the pins.
This tool is available from Tektronix, Inc. Order TEK-
TRONIX Part No. 003-0619-00. If an extracting tool is not
REV.C, MAY, 1975
available, use care to avoid damaging the pins. Pull slowly
and evenly on both ends of the IC. Try to avoid having one
end of the IC disengage from the socket before the other
end.
To replace one of the power transistors mounted on the
Power Module chassis adjacent to the interface circuit
board, first unsolder the leads, Then, loosen the nuts which
clamp the transistor to the chassis. Remove the defective
transistor. When replacing the transistor, use a mica washer
on the metal tab to increase heat transfer from the
transistor to the chassis.
12

Tektronix TM 503 Specifications

General

Brand	Tektronix
Model	TM 503
Category	Control Unit
Language	English