Read Sharp ER-A490 (serv.man4) Service Manual online
4) Up
-l
o
ad
in
g
mat
ri
x
fo
r t
h
e
satel
li
te
STATE
In
itia
l
Afte
r
receivin
g
ID-ENQ
an
d
sen
d
in
g
ACK.
Afte
r s
e
n
d
in
g
NAK
EVENT
0
1
2
ID-ENQ
Sa
tell
ite
c
h
e
c
k
s
the
t
e
rmi
n
a
l No.:If i
t i
s
corre
c
t,
sate
lli
te
sen
ds ACK an
d
g
o
e
s
t
o
1
.
If it i
s
n
ot corre
c
t, sate
llite
i
g
n
o
res the
ID-ENQ
.
Sate
llite
che
c
k
s
t
h
e
t
e
rm
in
a
l No
.:If it i
s
c
o
rrect, s
a
tell
it
e
s
e
n
d
s
ACK a
n
d
g
o
es to 1
.
If
i
t i
s
n
o
t
c
o
rrect,
s
a
tell
ite i
g
n
ore
s th
e
ID-ENQ.
—
ACK
—
—
—
NAK
—
—
—
EOT
—
—
Sate
lli
te g
o
e
s
to
0.
(ERROR END)
TEXT
—
Sate
llite
che
c
k
s
t
h
e
te
x
t b
lo
c
k
, if
th
e
b
lo
c
k
i
s
corre
c
t, s
a
tell
it
e
s
e
n
d
s
ACK a
n
d
g
o
es to 3
.
If it is no
t
c
o
rrect, Sate
llite
s
e
n
d
s
NAK a
n
d
g
o
es to 2
.
If
tra
nsm
is
sio
n
c
a
n
n
ot b
e
c
o
n
ti
n
u
e
d
,
sate
llite
sen
d
s
E
O
T
a
n
d g
o
e
s
to
0.
(ERRO
R END)
Sate
lli
te c
h
e
c
k
s
t
h
e
t
e
x
t b
lock
, i
f
th
e
b
lock
is c
o
rrect,
Sate
lli
te sen
ds ACK an
d
g
o
e
s
to
3.
If it is no
t
c
o
rrect, Sate
lli
te sen
ds NAK an
d
g
o
e
s
t
o
2
.
If tran
s
m
is
s
io
n
can
n
o
t
b
e
con
tinu
e
d
,
sate
lli
te s
e
n
d
s
E
O
T
a
n
d g
o
e
s
to
0.
(ERROR END)
T
IME-UP
—
Sate
llite
go
es to 0
.
(ERRO
R END)
Tim
e-u
p i
s
7
s
e
co
n
d
s
Sate
lli
te g
o
e
s
to
0.
(ERROR END)
Tim
e
-up
i
s
7
s
e
co
n
d
s
STATE
After re
c
e
iv
in
g
text an
d sen
d
in
g ACK
Afte
r
s
e
n
d
in
g
E
N
Q
Afte
r
s
e
n
d
in
g
TEXT
EVENT
3
4
5
ID-ENQ
—
—
—
ACK
—
Sate
llite
s
e
n
d
s
th
e te
x
t a
n
d
go
es
to
5
.
Sate
lli
te
sen
ds
th
e te
x
t
a
n
d g
o
e
s
to 5
, o
r
s
e
n
d
s
th
e
EOT
a
n
d
g
o
es to 0
.
(Norm
a
l END)
NAK
—
—
Resen
ds the
text an
d
t
h
e
n
g
o
es to 5
.
If sa
tel
lite
h
a
s re
se
nt th
e te
xt t
w
o
ti
m
e
s, s
e
n
d
s
EOT
a
n
d
g
o
es to 0
.
(ERROR END)
EOT
Sa
tell
ite sen
ds
ENQ
an
d
g
o
e
s
to
4.
Resen
ds
the
E
N
Q
a
n
d
the
n
g
o
e
s
to
4.
If Sa
tell
ite
h
a
s
resen
t t
h
e
ENQ
tw
o
t
im
e
s
,
s
e
n
d
s
E
O
T
a
n
d
g
o
es to 0
.
(ERRO
R END)
Sate
lli
te g
o
e
s
to
0.
(ERROR END)
TEXT
Sa
tell
ite c
h
e
c
k
s
t
h
e
text
b
lo
c
k,
if the
b
lo
c
k
i
s
corre
c
t, sate
lli
te
sen
ds ACK an
d
g
o
e
s
t
o
3
.
If it i
s
n
ot corre
c
t, sate
llite
s
e
n
d
s
NAK a
n
d
g
o
es to 2
.
If tran
sm
is
s
io
n
c
a
n
n
o
t b
e
c
o
n
tin
u
e
d, sa
tel
lite
s
e
n
d
s
E
O
T
a
n
d
g
o
es to 0
.
(ERROR END)
——
T
IM
E-UP
T
h
e
h
ost go
es to 0
.
(ERROR END)
T
im
e
-u
p
is 7 secon
d
s
Resen
ds
the
ENQ
a
n
d
t
h
e
n
g
o
e
s
t
o
4
.
If
sate
lli
te
h
a
s
r
e
s
e
n
t t
h
e
E
N
Q
two t
im
e
s
, s
e
n
d
s
EOT a
n
d
g
o
es to 0
.
(ERRO
R END)
Resen
ds the
text an
d
t
h
e
n
g
o
es to 5
.
If sa
tel
lite
h
a
s re
se
nt th
e te
xt t
w
o
ti
m
e
s, s
e
n
d
s
EOT
a
n
d
g
o
es to 0
.
(ERROR END)
T
im
e
-up
:
F
o
u
r
s
e
c
o
n
d
s
a
fter sen
d
in
g
of te
x
t.
Two secon
d
a
fter sen
d
in
g
of ENQ.
1 – 12
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