Essilor Instruments APH 550, Руководство по обслуживанию

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6
2 Block Diagram
E
ncl
osu
re
C
ontrol uni
t
O
pe
ra
ti
on
unit
C
ontrol
circu
it
P
rinte
r
P
rinte
r
dr
ive
circ
uit
R
einf
or
ce
d
insula
tio
n
He
ad
r
est
E
ncl
osu
re
Po
si
tio
n
de
te
ctin
g
se
ns
or
R
ight
chart
L
E
D
L
ef
t
chart
L
E
D
Mo
to
r co
ntr
ol
ci
rc
ui
t
Po
si
tio
n
de
te
ctin
g
se
ns
or
H
ead
unit
Inte
rfa
ce
E
ncl
osu
re
P
owe
r
sup
ply
bo
x
unit
F
use
P
owe
r
swi
tch
C
om
m
unic
atio
n
co
ntr
ol
circ
uit
Bas
ic
i
ns
ul
atio
n
S
wi
tch
ing
sup
ply
Re
info
rc
ed
ins
ul
atio
n
be
tw
ee
n
pr
im
ar
y
and
se
co
nda
ry
Le
ft m
oto
r drive
ci
rc
ui
t
Ill
u
min
at
io
n
LE
D
P
ositi
on
de
te
cting
se
nso
r
R
ight
m
oto
r
dr
ive
c
irc
uit
Ill
u
min
at
io
n
LE
D
P
ositi
on
de
te
cting
se
nso
r
L
ens
disk
m
oto
r
×
9
L
ens
disk
m
oto
r
×
9