Sharp MZ-80SFD Manual de usuario descargar pdf (Pagina 16)

•

Trouble

Shooting Chart

Problem 1: No voltage appears

at

any

output

terminal.

~

Check

AC

cord

I

AC

socket,

F101,

F102

AC

switch

and

C10t.

Is

there AC

220V

(240V

for U.K.I pntsent across

C101?

Y~

Check T101

Problem 2: +12V

is

not

developed.

11

Check IC201

and

its

peripheral

parts

.

.--

Is

there AC

20V

present across

the

V;:

Check

output

switching

red lead

of

T101 7

circuit.

Leave R203

be

open;

~

NM

N~

does

there

appear

f--

Check T101.

Check

0201

1Vp-p pulse

at

pin

No.

11

of

IC201.

I.-

Y~

Is

there

DC

20V

present across

C2027

t--

Does waveform

of

the

Y~

chart

appear

in

~y~

collector

of

Q2027

Check L201

and

C205, C209.

Problem 4: +5V is

not

developed.

No

Check

IC301

and

its

r

peripheral

parts.

r-

Is

there AC

14V

present across

the

Check

output

yellow lead

of

T101 7

Yes

switching circuit.

Leave

R303

be

open;

~

n

No

does

there

appear

f--

Check

T101.

rt

Check

0301.

1Vp-p pulse

at

pin

No.

11

of

IC301.

L-

Is

there

DC

14V

Y~

I---

present

across

C302?

Does waveform

of

the

Y~

chart

appear

in

collector

t---

of

03027

Check L301, C305,

Yes

and

C309, C310.

-14-

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Comentarios a estos manuales

Sin comentarios