Sharp CE-158 Manual do Utilizador descarregar pdf (Página 6)

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ll

and more

abo

ut Sharp P

C-

1500 at http

:/

/www.PC-1500.info

5. CIRCUIT DISCRIPTION

• Power >upply

The CE·1 58

is driven

by

the PC·ISOO power (Vee) and Ni

-C

d

battery,

or through an AC

adapte

r.

The

input

is

fe

d through the DC-DC

co

nverter

to

reach VDO (+

5.0

V),

VC

+ (+9.0 V

),

and

VC-

(-

9.0

V).

Not

el

. Oat"' rlnc 1

i1

1

cr

(

ESD

-H-

1

4B

}

,__,-<>

V

C-

(- 9.

0V)

1W

100C

l

EA21Ay

1

00

1

X2

+

r--

~-

-.

l

ow

ba

tt

ery

de t

ec

tion

Circu

it.

,__,-<>

VC

+ (+ 9.

0V

)

DC

-

DC

0.1

)I

f

P.GNO

-+-

-~'----;,_;....

~

'-

--·

S.

GND

1

6V

220µF

Con

Y

OtOI'

1---0

VD

oC

+ 5.0V }

Circuit

,__,..-<)

GNO

• Low battery detection circuit

4

Battery

condition is

monito

r

ed

by

th

e cir

cuit

s

ket

c

hed

below. Signals detected are check

ed

by

the

CPU for each receivi

ng

and transmilting st

ep

through LH58 J I

's

PA5

1/0

port.

Be

sides,

SW6

reaches the GND level with

po

wer on,

ther

e

by

turning

on

2SA937R

to

keep

the

low

batte

ry

detection circuir in functi

on

.

+

SOV

11rF

2

SA93

7R

(SW6

}

3.

:lKO

560

KO

150

H438L

L01

Vee

100

KO

RV22KO 2SC2021RS

Do

not sale this PDF!!!

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