Sony MZ-E800 service manual IC551, IC903 XC6383C601MR IC904 XC6368B101MR

IC551

XC111256FTAEB

WI

VMU

UO

GNDUV

VO

VMVW

WO

GNDW

CPUI

CPVI

CPWI

COM

48

47

46

45

44

43

42

41

40

39

38

37

VC

VC

VG

+

36

CPUO

–

VI

1

3PHASE

PRE

+

35

CPVO

UI

2

CONTROL

DRIVER

–

PWM

3

+

34

CPWO

–

VM1

4

VG

VC

VC

VC

VC

VG

33

VM3

RO1

5

PRE

H-BRIDGE

H-BRIDGE

PRE

32

RO3

PGND1

6

31

PGND3

DRIVER

CONTROL

CONTROL

DRIVER

FO1

7

30

FO3

VM12

8

VG

VC

VC

VC

VC

VG

VC

ROE

BIAS

29

VM34

RO2

9

PRE

H-BRIDGE

H-BRIDGE

PRE

PGND2

10

28

RO4

DRIVER

CONTROL

CONTROL

DRIVER

FO2

11

VC

VG

27

PGND4

VM2

12

26

FO4

25

PWM24

13 14

15 16 17

18

19

20

21 22

23 24

RI2 FI2

RI1

FI1

OE

VC

GND

VG

FI3

RI3

FI4

RI4

IC903

XC6383C601MR

IC904, 907

XC6368B101MR

CE

1

CHIP

PHASE

ENABLE

COMPENSATION

VDD

PWM

VREF

VLX LIMITER

5

LX

ERROR AMP

COMPARATOR

VOUT

2

FB

1

+

+

BUFFER,

BUFFER

–

–

DRIVER

VDD

2

+

2STEP PFM CONTROL

REFERENCE VOLTAGE

RAMP WAVE

–

OSC 100/180kHz

CE

3

PWM/PFM

NC

3

4

VSS

WITH SOFT START,

GENERATOR,

CONTROLLER

+

CHIP ENABLE

OSC

–

5EXT

4GND

– 39 –