Zenith Z-100 Series, Руководство пользователя

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Page 4-6
and connectors on the rear of the chassis, Then
set it aside.
• Li f t th e p o w e r s up p ly p a rt w ay o ut of t he chas-
sis. Then refer to inset drawing 4 1 on the Picto-
r ial and un p lu g cables P101 and P102 from th e
main circuit board.
NOTES:
1 . If 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
ROM and PAL ICs and/or modify the main
c ircuit b o a r d , p r o c ee d w i t h t he f o l l o w i n g
steps.
• R efer t o i n s e t d r a w i n g P2 o n t h e P i c t o r i al a nd
r emove the l arge orange and l arge black w i r e s
from the Signal/Power connector J101.
2 . If y ou d o n o t h a v e t o r e p l ace th e RO M a n d
P AL IC s o r m o d i f y t h e m a i n c i r c u i t b o a r d ,
proceed directly to "Reinstall ing the Base,"
T his com p l etes th e r e m o va l o f t h e p o w e r s u p p l y .
You w i l l r e i n s t al l t h e p o w e r s u p p l y l a t er . Pr oceed
to "Disassembly Conti n u e d ."
D ISASSE M B L Y C O N T I N U E D
R efer to I l l u s t r ation B o ok , Page 8, P i c t or ial 4- 7 f o r
the follow in g steps.
• Car ef u l l y s et t he keyboard in f r o nt of t he c has-
s is as sho wn . T h e n c a r e f u ll y u n p l u g t h e f l a t
c ables from P105 and P107 on the main c i r c u i t
b oard. Set the keyboard aside temporari l y .
NOTES:
1 . If 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 an d PA L I C s , m o d i f y t h e m a i n c i r c u i t
board, and/or replace the center base, proceed
with the foll o w i n g steps.
• R em ov e t h e t h r e e 4 - 40 x '/4 " s c r e ws a t l o c a -
tions BA, BB, and BC in the video circuit board.
• S w i n g th e v i d e o c i r c u i t b o a rd u p a n d t o w a r d
2 . If y o u d o n o t h a v e t o r e p l ace th e RO M a n d
P AL ICs, m o d i f y t h e m a i n c i r c u i t b o a rd , o r
r eplace th e c e n ter b a se, p r o ceed d i r e c tl y t o
"Replacing the Disk Drive."
the rear as shown.
• U n p l u g th e ca b l e s f r o m v i d e o c i r c u i t b o a r d
R efer to I l l u s t r ation B o ok , Page 7, Pi c torial 4- 6 f o r
the follow in g steps.
• R em ov e t h e t w o 4 8 x 3/~" self-tapping screws
plugs P301, P302, and P303.
• U n p l u g th e t w o f l a t c a b l es f r om m a i n c i r c u i t
board plugs P104 and P106.
f rom locations AL and A N .
• Rem o v e t h e v i d eo circuit board and set it aside,
• L i f t th e b a s e u p w a r d a n d t o w a r d t h e b a ck o f
t he chassis un ti l t h e b ase clears th e c o n t r o l s ,