Tandy 6000 HD, Руководство по обслуживанию

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DUST COVER
T h e design o f an enclosure should in c o rp o ra te a
means to p re ve n t c o n ta m in a tio n fro m loose item s,
e.g., d u st, lin t, and paper chad since the d riv e does
n o t have a dust cover.
FREE AIR FLOW
W h e n th e d riv e is m o u n te d so the com ponen ts
have access to th e free flo w o f a ir, n o rm a l convec­
tio n c o o lin g a llo w s o p e ra tio n over the specified
te m p e ra tu re range (see T able 2-3, page 2-7).
CONFINED ENVIRONMENT
W h e n the d riv e is m o u n te d in a c o n fin e d e n v iro n ­
m e n t, a ir flo w m u st be p ro v id e d to m a in ta in
specified a ir tem peratures in th e v ic in ity o f the
m o to rs and the c irc u it boards.
3.4
INTERFACE CONNECTORS
T h e e le ctrica l in te rfa c e between th e d rive an d the
host system is v ia three connectors. J l p ro vid e s
c o n tro l signals f o r the d riv e (see F ig u re 3-2). J2
p ro vid e s fo r the ra d ia l co n n e ctio n o f re a d /w rite
data signals (see F igure 3-3). J3 provides fo r D .C .
pow er (see F igure 3-4).
T able 3-1 contains in te rfa ce lines. T he in te rfa ce
d e scrip tio n o f th e connectors, and the lo c a tio n o f
each, is containe d in th is section.
J1/P1 CONNECTOR
C o n n e ctio n to J 1 is th ro u g h a th irty -fo u r-p in c ir ­
c u it b o a rd co n n e cto r. F igure 3-2 contains the
dim ensions o f th is co nnecto r. The pins are
num bered 1 th ro u g h 34. T he even pins are located
o n the co m p o n e n t side o f th e c irc u it b o a rd . P in 2
is located on the end o f the c irc u it b o a rd connec­
to r closest to the D . C . pow er connecto r J 3 /P 3 ,
and is labeled. A key slot is p ro v id e d between Pins
4 and 6. T he recom m ended m a tin g connecto r fo r
P I is 3 M rib b o n connecto r P / N 3463-0001,
w ith o u t ears.
J2/P2 CONNECTOR
C o n n e ctio n to J2 is th ro u g h a 20-pin c irc u it b o a rd
edge co n n e cto r. F igure 3-3 contains the d im e n ­
sions o f th is co n n e cto r. The pins are num bered 1
th ro u g h 20. T he even pins are located o n the co m ­
ponen t side o f the c irc u it b o a rd . The recom m end­
ed m a tin g c o n n e cto r fo r P2 is 3 M rib b o n connec­
to r P / N 3461-0001, w ith o u t ears. A key slot is p r o ­
vided between P ins 4 and 6.
3-3