Spectravideo MKI, Сервисное – Техническое руководство

Страница: 133 / 134

* 1
Du r i ng T i , the INIT IAL l i ne i s " LOW" and the p r i n t e r
i s
he l d in a re s e t s t a t e . The
in i t i a l i z a t ion
se quenc e
s t a r t s exec u t ion a f te r the l i ne goe s "H IGH" .
*2 Af te r the
Pr i n t e r
f i n i shes exec u t ion of the
i n i t i a l i z a t i o n se quence th e BUSY l ine goes "L1)W" .
( 3 )
CLK s igna l
( 5 )
S e l f-Te st P r i n t ing
500 - 600
ns
�
I-- 2.5 J.LS
f = 400 KHz
Bring ing the TEST l i ne "LOW" s t a r t s the se l f- t e s t p r int ing wh i c h
cont inues unt i l i t i s r etu rne d "HIGH" .
( 6 )
Cha s i s Ground
As s t a t e d in
[ 6 ] - 3 - ( 3 ) ,
al l o f the s i gna l l ine s shou l d be twi s t e d
p a i rs w i th t he s ignal g round l i nes , b u t it i s furthe r recommended
that the ca b l e be sh i e lded and tha t one t e rm ina l be conne c t e d to
t he CONTROLLER CHASSIS GND and t he other c onnec te d to the FRAME
GND
on the con t ro l l e r side .
4 . 1 00