A
ll
and more about Sharp PC-1500
at
http://www.PC-1500.info
• Solenoid drive circuit
Y.iw
o.
ssn
2Sl192G
10
PB!
1.SKO
._
___
4-
·
.:.r;:.64---+----0
Soleno;d(- )
t/O
pott
] 500
1500
9
PBO
1.5KO
..-
-+-
-+
-
~--i-o--
-4-
-Q
Sol
e
noid!+>
27KO
5601\
The solenoid is driven by the
PEN
UP signal
PBO
and the
PEN
DOWN
signal
PB
I that is sent
to
the
drive circuit
via the 1/0 port.
I)
TI1e
high state
of
the PB! signal, TS and T7 actuates to turn the solenoid(- ) terminal GND level.
Actuation
of
tl1e
TS
causes
T6
to
actuate to
tum
the solenoid(+) tenninal
VM
level (about +6V)
and
drive the solenoid
of
lower
the
pen to start printing.
2)
The
high state
of
the PB! signal,
T2
and
T4
actuates to turn
tl1e
solenoid(+) terminal GND level.
Actuation
of
tl1e
T2
causes
T3
to
actuate
to
tum
the solenoid(- ) terminal
VM
level (about +6V)
and drive the solenoid to lift up tile pen
to
stop rinting.
3) DI thru OS are ihe arc suppressor diodes for ihe solenoid.
•
Motor
drive
ci
r
cu
it
PC7
25
1-'-"-'--·C::»--- Y motor D
2•
PC6
>:..-- Y motor c
2;
f•C5
>:>-
- Y motor B
1
/0
port
Z2
f'C4
21
pc·
~--XmotorD
aJ
f'C2
:>o
--
X motor C
19
PCl
18
PCO
:>o
--
X motor A
Bas
ic drive pulw
D D
PhawA
Phase B
Phase C
Phase D
Motor
dock
~
•I
Mi
n
3
.
85-mS
~
10
X motor A thru X
motor
D are the signals that
drive the st
ep
motor ·the move the carriage on the
carriage
rail
. And, Y
mo
tor A thru Y motor
Dare
the paper feed step
motor
drive signals.
As the
PC-1
SOO
fetches character data from the
ROM
of
the CE-I
SO,
Il
ic mo
to
r
dr
ive action
is
cont
roUed
via
Ilic
1/0
port
of
the CE-I
SO.
D
Hold ti
me
tMH
Min 12rnSec
Do not sale this PDF
!!
!
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