Service manual

ManualsBrandsClevo ManualsComputer equipment3420

1

2

3

4

5

B

C

B

B – 19

I/O PORTS

REV. 2

FIG. B  18

I/O

+12V

+5VS

+5VS

+5VS

+3V

+3V

+3VS

+5VS

EXT FDDEN#20, 22

LPT D[0..7]18

LPT ACK#18

LPT AFD#18

LPT B US Y #18

LPT SLCT #18

LP T SL CT I N#18

LPT ST ROBE#18, 22

LPTPE#18

LPT ERROR#18

LPT I NI T #18

RT S1#18

SUSB#3,5,6,9,14,15,20,23

DT R1#18

TXD118

COM _RING20

DCD1#18

RING 1#18

RXD118

CT S1#18

DSR1#18

EXT FDDPWR#15

DT R#

TXD

RT S#

RING#

CT S#

RXD

DSR#

DCD#

LPA C K#

LPPOWER

DFDD/LPT #

LPT D3

LPB U SY

LPPE

LPT D2

LPSLCT

LPT D0

LPT D6

LPT D4

LPERROR#

LPA C K#

LPD6

LPD2

LPD3

LPT D5

DFDD/LPT #

LPD1

LPINIT #

LPS L CT I N#

LPD5

LPD0

LPD4

LPD7

LPT D1

LPT D7

LPERROR#

LPINIT #

LPS L CT I N#

LPB U SY

LPA C K#

LPPE

LPSLCT

DT R#

RT S#

TXD

DCD#

RING#

RXD

CT S#

DSR#

LPD2

LPD0

LPD6

LPD7

LPD5

LPD4

LPD1

LPD3

LPA F D#

LPST ROBE#

LPST ROBE#

LPA F D#

+

-

U3A

LM358

3

2

1

84

U2

7SZ04

24

53

L35

1 2

L46

1 2

L39

1 2

L32

1 2 L45

1 2

L48

1 2

L47

1 2

L33

1 2

L37

1 2

R2

100K

R197 (BK1608l121)

R196 (BK1608l121)

R203 (BK1608l121)

R199 (BK1608l121)

R198 (BK1608l121)

R202 (BK1608l121)

R200 (BK1608l121)

R201 (BK1608l121)

R19

100K

R18

100K

R208

39K

R6

4.7 K

C26

.1UF

C7

150P

C8

150P

C9

150P

C10

150P

C11

150P

C12

150P

C13

150P

C14

150P

C38

100PF

C33

.1UF

C263

270P

C19

220PF

C257

270P

C261

270P

C259

270P

C264

270P

C255

270P

C265

270P

C254

270P

C269

270P

C258

270P

C260

270P

C266

270P

C1

270P

C268

270P

C267

270P

C256

270P

D6

1N4148

12

C24

.1UF

C15

.47UF

C25

.47UF

C16

.47UF

RN1

10P 8R-1K

10

9

8

7

6

1

2

3

4

5

T1

R3

100K

JCO M1

PAN/COM PORT

5

9

4

8

3

7

2

6

1

10

11

C262

270P

L41

1 2 L40

1 2

L43

1 2

L42

1 2

L36

1 2

L38

1 2

L44

1 2

L34

1 2

U20

MAX3243-MAX3243E

1

2

14

13

12

4

5

6

7

3

9

10

11

19

18

17

16

27

815

20

28

24

26

2522

23 21

C2+

C2-

T1IN

T2IN

T3IN

R1IN

R2IN

R3IN

R4IN

V-

T1OUT

T2OUT

T3OUT

R1OUT

R2OUT

R3OUT

R4OUT

V+

R5INR5OUT

R2OUT B

C1+

C1-

VCC

GNDFORCEOFF

FORCEO N INVALID

C251

.1UF

C252

.1UF

S1

G1

D1D1

Q2B

SI9936DY

4

5

6

3

S1

G1

D1 D1

Q2A

SI9936DY

2

7

8

1

Q1

DT D114EK

C

E

B

JPRN1

CEN/PRINT PORT

13

25

12

24

11

23

10

22

9

21

8

20

7

19

6

18

5

17

4

16

3

15

2

14

1

26

27

R17

22K

Q7

2N7002

G

DS

C250

.001UF

+

-

U3B

LM358

5

6

7

Connect to SMI

/ DSK CH G#

/RDATA#

/STEP#

/WP#

/DIR#

/TRK0#

/HDSEL#

/INDEX#

/DENSEL#

/DRV0#

/MTR0#

/MTR1#

/DRV1#/5V

/WDATA#

/WGATE#

BK1608LL121

BK1608LL121