Zenith Z-100 Series, User Manual

Page: 125 / 150

Page 5-7
Refer to Pictorial 5- 8 ( I l l u s t ration B o o k l et, Page 26)
for the follow i n g steps. Make sure that the pi n 1 en d of th e IC is po si t i o n ed
over the in dex m ark on th e c i r c ui t b o ard (see Detail
5-8B). Also make sure that all of the p in s are started
into the socket. NO TE: A n I C p i n c a n b e c ome bent
under the IC and it will appear as though it is cor-
rectly installed in the socket.
NOTES:
1, I f y o u d e t e r m i n e d t h a t y o u m u s t r e p l ace th e
R OM and PA L I C s , p r o ceed w i t h t h e f o l l o w -
ing steps.
SMR11
INDEN'ATION
NOTCH
DDT
2 . I f y o u d o n o t h a v e t o r e p l ac e th e RO M a n d
P AL ICs, but do n eed to m o d i f y t h e m ai n c i r -
c uit board, ski p t h e f o l l o w i n g s t eps and p r o -
c eed directly t o " M o d i f y i n g th e M a i n C i r c u i t
Board."
PIN 1
PIN I
PIN I
NDTCN
RIDGE
R efer to Detail 5-8A and 5-8B as you read the foll o w -
i ng informati on .
CAUTION: Th is comp u t er conta ins ESD (Electrosta-
tic Sensitive) devices. Exercise extreme care in han -
dling these devices to prevent damage.
T he pins o n t h e I C ' s m a y b e b en t o u t a t a n a n g l e ,
so they do not line up w i t h th e holes in the IC socket.
D o not try t o i n s t al l a n I C w i t h o u t f i r s t ben d in g th e
p ins as foll o w s . T o d o s o m a y d a m age th e I C p i n s
or the socket and cause interm i t t ent contact.
B efore you i n s t al l a n I C , l a y i t d o w n o n i t s s i d e as
s hown in D e t ai l 5 - 8 A a n d v e r y c a r e f u ll y r o l l i t t o -
wards the pins to bend the lower p ins into li ne. Then
turn the IC over and bend th e p in s on th e other side
in the same manner.
PIN I
S OC KET
'''i:,::,"
:i"
I fqPEIT
' I 'I
PIN 1
'i
i A 11 K
-itp
Detail 5-8B
Pin 1 identifications
IC LEADS
Detail 5-8A
IC pins