Tektronix 2213 - Page 96

Any
re p lacement component s
h ould be of t h e original
typ
e or α d irect re p lacement . B
en d tra n sisto r lea d s to fit
t h eir circuit b oard h oles a
nd cut t h e lea d s to t he same
le n gt h as t he
original component . See F ig u re 9-2 for typ
ical
lea d -configuration
illust r ations .
REV
N
O
V
1981
TR A N SISTO
R
S
A N D
I N T E G R AT E
D
CI
R
C U
ITS
Transistors and integrate d circuits s hould not be
replace d u nless t hey are act u ally d efective . If u nsol d ere d
from t he circuit boa r d during routi ne maintenance, return
t h em to th eir o r igi n al b oar d locations . U
nnecessary replace-
ment or trans posing
of semicon d uctor devices may affect
t he ad j ustme n t of t
he
instrume
n t
. Wh
en α semicon d uctor is
re p lace d , c
h
ec
k
t
h e p erformance of any instrume n t ci r cuit
t h at may be
affecte d .
Ta b le 6-4
M ainte n ance Aids
M aintenance-2213
Se
r vice
To r emove α sol d ere d du al-in-li n e pac kaged (DI P ) IC, do
n
ot
h eat ad j acent cond u ctors co n secutively . Apply
h
eat to
p ins at alternate si d es and en d s of t
he
IC
as sol d er is
remove d . Allow α
moment for t h e circuit boar d to cool
before p
roceeding to t h e next pin .
T h e h eat-si nk
-mounte d power su pp ly transistors are
i n sulate d
from t h e h eat sin k . In add ition, α h eat-sin k
compoun
d is use d to increase heat transfer cap abilities .
R ei n stall t
h
e
insulators and re p lace t he h eat-sin k compoun
d
w hen re p lacing
t hese transistors . T he com p oun d sh oul d b e
applie d to bot
h si d es of t he i n s u lators and s hould be
applied to t
h e bottom si de of t he transistor w h ere it comes
i n contact wit
h
t
h e insulator .
ΝΟΤΕ
After replacing α power transistor,
check
t
hat the
collector
is not shorted to the h eat sink
before
applying
power to the instrument .
6-1
1
Description
Specificatio n s
Usage E xam p
le
1 . Sol d ering Iron
15 to 25 W .
Ge n eral soldering a nd Antex P recision M odel C .
unsolderi ng .
2 . Torx Screw
d rivers Tom ti p s #Τ 7,
# Τ
8,
# Τ 9,
Assembly an
d disassem b ly .
Te k tronix P art N umbers
# Τ 15 and
# Τ 20 .
# Τ 7) 003-1293-00
# Τ 8) 003-0964-00
# Τ 9) 003-0965-00
#T1 5) 003-0966-00
# Τ 20) 003-0866-00
3 .
Nutd rivers 1/4
inc h , 9/32 inc h , 5/16 Assembly an
d d isassem b ly . Xcelite #8, #9, #10,#16,
inc h , 1/2 inc h , and 9/16 inc
h . and #18 .
4 . O p
en-en d W rench es 1/4 inc h , 7/16 i nch , 1/2 inc
h , Assem b ly and disassembly .
9/16 inc h , and 5/8
inc h .
5 . Allen W rench es 0 .050
inc h and 1/16 inc h ., Assem
b ly a n d disassembly .
6 . L ong-nose
P liers
Com p onent removal and
re p laceme n t .
7 . Diagonal Cutters
Component
removal and
re p lacement .
8 . V acuum Solder Νο
static c harge retention . U nsoldering
com p onents . Pace M od el P C-10 .
E xtractor
9 .
Lubricant
Νο - N oise . Switc
h lu b rication . Te ktron ix P art N um ber
006-0442-02 .
10 .
P i n -re p lacement K it
R eplace circuit boar
d Tek tron ix P art N umber
co n nector p ins .
040-0542-00 .