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Mafntenance
-
494[l4g4Ap
Servtce
Vot.
1
SERvIcING
TooLs
FoR
BoARD'Tffi3.i*,o"=
MouNTED
coMPoNENTs
Replacing
Surface-Mounted
Components
A
Hot Air
Machine,
such
as
Hart
Model
200A
manufactured
by Nu-Concept
Computer
Systems
lncor_
porated
of
Colmar,
pennsylvania,
is
recommended
for
unsoldering
and
soldering
surface-mounted
com-
ponents.
Table
6-5
lists
tools
that are
suitable
for
servicing
circuit
boards
with
surfac€-mouni€d
components.
.
Do
not
apply
too
much
heat,
as
th€
pad/s
on
which
the
device
is
soldered
may
be lifted
fiom
the
circuit
board.
1.
Unsolder
the
component.
2.
Clean
the
board
with
isopropyl
alcohot.
3.
Solder
in
the
replacement.
Surface-mountecl
components
are
pretinned,
and
shoutd
be soldered
onto
the
board
with
solderpaste
rather
than
solder.
lf you
use a soldering
iron,
use one
with
a
small
tip. After
applying
th€ sotderpaste,
touch
the corner
of the
pad
with
the iron
to
fasten
the component.
Avoid
touching
the
component
with
the
hot soldering
iron.
Thermal
shock
causes
hairline
cracks
that
are
not visible
to
the
eye.
Transistor
and Integrated
Circuit
Confi
gurations
Lead identification
for
transistors and integrated
cir-
cuits,
is
readily
available
from
manufacture's
data
books. Integrat€d
circuit
pin-outs
for
Vcc
and
ground
are shown
with a
box
on
the
schematic
diagram. Refer
to Soldering
Technique
in Corrective
Maintenance
part
for
unsoldering
and
soldering instructions.
Model
Type
Tektronix
Part
No.
Hor
Alr
Hepair
Terminal
Tempilaq
Tempilaq
Thinner
Flux
Dispenser
Soldering
lron
Nu-Concepts
Systems
HART2OOA
Nu-Concepts
Systems
Nu-Concepts
Systems
TLTH
Nu-Concepts
systems
FD2
N/A
N/A
N/A
N/A
Hexacon
Model
SMD1O
003-1401-00
uordertng
tron
SMD
Tips
Semi-Chisel,
1/16'
Conical,
1132'
Sharp
Contcat"
Bevel,
1/32"
Chisel,
1/16'
Bevel,
l/16'
0.062"
Stot"
0.195"
Slot
0.195"
Slot
0.195'Slot
0.195"
Stot
Hexacon
Modet
ZTAOX
Hexacon
Modet
ZTB}X
Hsxacon
Modet
ZI&4X
Hexacon
Model
ZZ$6X
H€xacon
Model
ZZ|TX
Hexacon
Modet
ZT$BX
Hexacon
Model
5303
Hexacon
Model
S30g
Hexacon
Model
S314
Hexacon
Model
3316
Hexacon
Modified
3302
003-1402{0
003-1403-00
@3-1404-00
003-1405-00
003-140&00
003-1407-00
003-1408-00
003-1409-00
003-1410-00
003-141
1-00
003-1412-00
titainbss
Steel,
Non-Magnetic
Tweezers
Straight
Tip
Curved
Tip
Tektronix
Part
No.
003464-00
Tektronix
Part
No.
003-046$.00
Tektronix
Part
No.251
-051
4-00
6-17