5
4
Block Diagram
LCD
M
oto
r
M
oto
r
Op
er
at
ion
S
wi
tc
h
RS
-232C
Inte
rf
ac
e
F
oc
u
s M
ot
or
P
osit
ion
S
en
sor
T
ar
get
Mot
or
P
osit
ion
S
en
sor
P
ote
ntio
m
ete
r
M
ea
sur
ement
Sta
rt
Sw
itc
h
Mai
n Con
tr
ol
C
ircui
t
U
ni
t
E
E
P
R
OM
P
rinte
r
P
ri
n
ter
Con
tr
ol
Ci
rc
u
it
U
n
it
C
M
OS
C
am
er
a
C
M
OS
C
am
er
a
R
anging
S
enso
r
Ke
ra
to
L
E
D
T
ar
ge
t
L
E
D
R
ef
L
E
D
R
anging
L
E
D
F
use
P
owe
r
S
wi
tch
P
ower
In
let
S
wi
tc
h
in
g S
u
pp
ly
B
asic
Insula
tio
n
R
ei
n
fo
rc
ed
In
su
la
ti
on
B
et
w
ee
n
Pr
im
ar
y
an
d
S
ec
on
da
ry
M
eta
ll
ic
P
or
tio
n
wi
th
P
ro
te
ctive
E
ar
th
(C
has
sis)
Rei
n
for
ced
I
n
su
la
ti
on
L
CD Rel
ay
Ci
rc
u
it
U
n
it
H
ea
dr
es
t
Ch
in
res
t
D
C 1
2V (
S
EL
V)
D
C
5V (
S
EL
V)
AC
10
0
-
240V
50
/ 6
0H
z
Summary of Contents for AKR 550
Page 1: ...Auto kerato refractometer Maintenance Manual V1 09 2016 ...
Page 7: ...6 5 Connection Diagram ...
Page 8: ...7 ...
Page 62: ...61 ...