Spectravideo MKI, Service – Technical Manual

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ELECTRICAL/FUNCTIONAL
Co nnec t t h e powe r supp l y and modu l a t or to the compu t e r and the TV rece ive r
( se l ec t the r i gh t channel and the TV-Sy s t em ) . Turn on the lowe r swi t c h , the
"POWER ON"
LED
shou ld l i gh t up and "SPECTRAVI DEOtt logo p rompt on the screen and
chang ing c o l our t h ree t imes .
Basic
Funct i ona l Check
1.
T ype t he fol low ing p rog ramme :
10
FOR X
=
1 to
254
20 ?
CHR $ ( X ) ; : NEXT : GOTO 1 0
( P re s s tENTER' in each s t a t ement )
2.
P ress
"F5"
( To run t he p rog ramme )
3.
Obse rve that
all
cha rac t e rs and grap h ic s ymb o l s wi l l be disp l a ye d
repea t e d l y . P e r f o rm shock t e s t du ring t he p rog ramme .is runni ng and
make s u re the p rog ramme w�l l no t be in terrup t e d or t e rmina t e d by the
s hock in t he te s t .
4,
P re s s, " STOP" , ob s erve that p rog ramme is temporary s topped by th is .
P re s s " STOP" aga in and no te that t he prograinme w i l l cont i nue .
5.
Pre s s
"CRTL
STOP" , the p rog ramme should te rmin a t e d by th is command
and t he "OK" p rompt reappe a r .
6.
Pre s s
"F4"
( L i s t t h e p rogramme ) and ob s e rve the p rog ramme con t e n t i s
l i s te d out w i t hout e r r o r .
7 . Move t h e cursor w i t h i n a l i ne and then p re s s " I N S / PASTE" , t ype i n
seve r a l characte rs a n d obs e rve t h a t t he cha rac t e rs a re inse r t e d .
8.
Pre s s
"DEL/CUT"
to d e l e t e t h e cha rac t e r und-er the cu rsor .
9 . P re s s
"CLS /HM''
and obse rve that t he scre en shou ld be c l e ar and the cur sor
appe a r a t the l e f t-top pos i t ion .
3. 7