Zenith Z-100 Series, User Manual

Page: 101 / 150

Page 4-9
•
S older on e en d o f t h e 8 ( /ze wire t o t h e U 1 3 0
Refer to Illu stration Bo ok, Page 10, Pictorial 4-11 for
the follow in g steps.
• C ar ef u l l y l i f t t h e m a in c i r c u it b o a rd up and o ut
of the chassis and p o s i t io n i t c o m p o n e n t-side-
down as shown in Pi c t o r ial 4-11.
pin 10.
• Si m i l ar l y , s o l d er t he remaini ng end of t he 8'/
2"
wire to U225 pin 3.
•
P osition t h e t h r e e w i r e s a g a i ns t t h e c i r c u i t
board as shown in the Pictorial ,
• Refer t o t h e i n s et d r a w i n g on t he P i c t o ri al a nd
carefully c u t t h e f o i l t r a c e a t U 1 6 8 p i n 11
e xactly as shown. Use an X-acto~ knife or simi -
l ar tool. Be careful not to cut any other foi l .
e P rep a r e t he f o l l o w i n g t h r ee wi r e s. First cut the
w ire to the p r o per l e n gth and r e m ove appr o x i -
m ately '/8" of i n s u l a t io n f r o m e ac h e n d . T h e n
t wist t ogether th e s m al l s t r a nd s a t e ach w i r e
end and melt a small am o un t of solder on each
wire end to hold the strands together.
C arefully i n s p ect the ci r c ui t bo ard for th e f o l l o w i n g
most commonly m ade errors.
® Un so l d e r ed connections.
• Poo r s o l d e r connections.
• Sol d e r b r i d g es between foil patterns.
• Prot r u d i n g l e ads whi ch could touch together.
6(/2" wire
8(/2" wire
2 I/~
8
wire
• L o ok ca r e f u l l y a t t h e P i c t o r i al a nd s o l d er o n e
e nd of th e 6 ' /2" w i r e t o U 1 5 2 p i n 1 . U s e o n l y
as much solder and heat as necessary to ensure
a good connection, Cut off any excess bare wire
end.
Refer to Illu stration Bo ok, Page 11, Pictorial 4-12 for
the follow in g steps.
• I f th e p o w e r s u p p l y i s s t i l l i n t h e C o m p u t e r ,
connect power sup pl y l e ads P1 and P2 to P101
a nd P102 on t h e m a i n b o ar d b e f ore i n s t al l i n g
the board,
• S ol d e r t h e r e m a i n i n g e nd o f t h e 6 ' / 2" w i r e t o
U130 pin 8.
U130 pin 9.
• S ol d e r t h e r e m a i n i n g e n d o f t h e 2 V z" w i r e t o
• S im i l a r l y , s o l d e r o n e e n d o f t h e 2 ' / 2 " w i r e t o
• Posi t i o n t h e m a in c i r c u it board ins ide the chas-
s is and l i n e u p t h e s t u d s o n t h e c h a ssis w i t h
the mounting holes in the circuit board. Be sure
t he connectors along th e back edge of th e c i r -
cuit board p r o t r ud e t h r o ugh t h ei r c o r r espond-
ing holes in the rear of the chassis.
the indicated foil at R104.
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