Sharp SF-1120, SF-1020 service manual Main circuit, Block diagram

8

7

6

5

4

3

2

1

2. Main circuit

(1) Block diagram

D

DC PWB

RTH

MM

AE

DMS

BL

LM

ORS

CFMPWM

D

PROCON

PWB

LED

FW

RTH

MM

PDA

PCG

MCS

VREF

BL-DATA

MCG

FET1

PR

PR

Q5

PR

IC20

IC14

IC21

IC17

IC2

LED0,LED1,CFMPWM

TM0,TM1

IC5

TMa,TMb

TM

OFF

Q8

LM-A,/LM-A

LM-B,/LM-B

13

16

TC

15

IC9

H3

TRC

14

PR-OFF

FWS, RTH

Q2

AEG0, AEG1

AES

PCG MCG

MCS

PROCON

VREF

BL-DATA

RRC

ULN2004

10

MPFC

16

IC15

MMPWM

PSPS

AEG0,AEG1

15

CPFC1

DATA0

15

VFM

14

VFMPWM

C

DL

IC19

C

13

IC10

SFM

MHPS,LHPS

ULN2004

TC,TRC,RRC,PR,MPFC

AEG0,AEG1

MHPS

VMF2

11

PSPS,CPFC1,DL,SFM,DC-OFF

LHPS

OP-CLK

OP-CLK

D-RES

SRES

IC10

IC22

IC18

D-RES

OP

TD82504

A-RES,S-RES

I/O

OP-CLK

IC3

ADF

SEL

OP-LATCH,OP-DATA,PFMCLK

PWB

12 –

D-D TR ,A-D TR,S-D TR

IC12

/RESET

SORTER

A-TXD

D-TXD

A-TXD

S-TXD

TXD,DTR

KI0,KI1,KI2,KI3

ADU

S-TXD

IC11

D-TXD

IC18

A-RXD

RXD

3

S-RXD

TD82504

TFD,MMRE

D-R XD

A0-A2

D0-D7 /RESET

/CS2

IC3

TFD, MMRE

A-DSR

S-DSR

12

5

CS2M

RXD

CS2M

11

6

CS3M

DATA1

CS3M

10

IC16

7

CS4M

DATA1,DATA2,S0,S1,S2

DATA2

CS4M

IC21

15

ULN2004

2

CPFC2

S0

CPFC2

14

3

CPFC3

S1

CPFC3

CPFC4

13

4

C PFC4

A0- A16

S2

B

/RESET

B

D0-D7

IC13

SELA

12

5

D VBIAS

ROM

/RD

CPU

SELA,SELB,SELC

SELB

11

IC9

ULN2004

6

THV/MHV

/CS1

SELC

DVBIAS

OP-LATCH

IC20

THV/MHV

8

SHV

12

IC19

SHV

10

7

GBPWM

MIR-A,/MIR-A,MIR-B,/MIR-B

IC1

MIR

GBPWM

ULN2004

SCL

2

EEPROM

SDA

Q9

DFM

13

OCSW

11

SELA

IC15

1

10

SELB

MPS

14

LS151

9

SELC

SWDS

PPD

IC18

9

PPD

12

8

DATA0

3

15

ADFD

ADFD,SORTD

10 11

SORTD

A

GND

+5V1

+5V2

+VCL

+24V

+VH

A

DC PWB

8

7

6

5

4

3

2

1