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TM200 Service Manual
- 23 -
T
he cov
e
r
open sen
s
o
r
i
s
lo
cat
e
d
next
to
the
ther
m
a
l p
r
i
n
ter
mechanism, and
it
i
s
connect
ed
v
i
a
Door Sensor board
asse
m
b
ly
t
o
t
h
e m
a
i
n
ci
rc
u
i
t bo
a
r
d
un
i
t
.
D
e
te
c
t
o
r
sig
n
a
l
INPUT_4
is i
n
pu
t t
o
t
he CPU
.
Control Pan
el Control Circuit
T
h
is co
ntr
o
l
panel
i
s
loc
a
ted
on
the mainboard
. I
t
ha
s thr
ee L
E
Ds (
PO
WE
R
,
ERROR,
PAPER
)
an
d
on
e
bu
tt
o
n
(
F
EED
). The
POWER
L
E
D d
r
i
v
e
s
when +5V i
s
supp
li
ed
b
y
t
he
po
wer c
i
rc
uit
.
T
he
ERROR
and
PAPE
R
L
E
Ds ar
e con
tro
ll
ed
b
y
the CPU
.
Drawer Kick
Control Circuit
When si
gna
l
s KICK_OUT_X1
and
KICK_OUT_X2
from CPU
g
o
a
c
ti
v
e
,
i
t
cau
s
e
s
tr
ansi
stor
a
rra
y
and
ou
tp
utt
i
ng
the
d
r
awer
d
riv
e sig
n
al
. The OPEN_CLOSE sig
n
al,
whi
ch ind
i
cate
s
whet
her or
not th
e
d
r
a
w
er is op
en, is inp
u
t
t
o
the CPU, an
d
thi
s
st
at
us
ca
n b
e
obtained
from t
he host
int
e
rfac
e.
Power Supp
ly Circuit
T
he ta
b
l
e as below
shows sup
ply
v
o
lt
age
v
a
l
u
es a
n
d
t
heir ap
pl
ica
t
i
o
ns.
Po
w
e
r s
u
pp
ly v
o
lta
g
e
v
a
lu
es
a
n
d
a
pp
lic
ati
o
ns
Voltage Value Main Applications
1.8V Power supply for the CPU core
3.3V Power supply for the CPU I/O pins
Logic circuit power supply
Interface board power supply
Detector power supply
+5V (VCC)
Thermal head logic circuit power supply
Printer mechanism power supply
Paper feed motor
Thermal head
Autocutter
+24V
Drawer kick driver power supply
+24V Co
ntr
o
l Cir
c
uit
T
he +24V p
o
wer
supp
ly
i
s
s
p
li
t
b
e
t
w
een t
he pr
int
e
r
power
sup
p
l
y
and +5V
.
Then
split into 3.3V and 1.8V.
+5V Cont
rol Circuit
A +5
V r
e
gu
lat
o
r
cir
c
ui
t swi
t
c
hes the
inp
u
t +2
4V po
wer sup
p
l
y
an
d
co
nv
er
ts i
t
t
o
+5
V
.
The
swi
t
chi
ng
regu
lat
o
r
IC
swit
ches t
he i
n
put
+24V,
a
nd
+
5
V
vo
lt
ag
e
is o
u
t
pu
t.
T
he RS
-
2
32 p
o
wer
supp
ly
is g
enera
t
ed
by
a ch
arg
e
up
cir
c
ui
t b
u
il
t
int
o
t
he R
S
-232
i
n
t
e
rface’
s
on
boa
r
d
dr
iv
e
r
.