Boss Audio Systems 4100 Service Manual download pdf (Page 41)

MEX-BT4100E/BT4100P/BT4100U/BT4150U

41

– KEY Board –

IC901 PT16512-LQ

IC1300 OZ539IGN-A1-0-TR

BST 1

LX

2

FLT_USB

9

VIN

3

EN_SYS

4

USBOUT 5

ISET_USB10

RT15

VREF16

FB_USB 6

USBIN

2V

UVLS

7

SYNC

8

GNDA

14

VIC_USB

11

SS_SYS

13

EN_USB

12

HDR

+

OSCILLATOR

REFERENCE

GENERATOR

OVER CURRENT

PROTECTION

VS

SEL

Q

S

R

ADJUSTMENT

GENERATOR

CHARGE

PUMP

OVER-CURRENT

LIMIT

USB FAULT

PROTECITON

VOUT_SYS (USBIN)

FAULT PROTECTION

+

–

+

–

+

–

+

–

GP1/SEG1/PW1

1

GP2/SEG2/PW2

2

GP3/SEG3/PW3

3

GP4/SEG4

4

GP5/SEG5

5

GP6/SEG6

6

GP7/SEG7

7

GP8/SEG8

8

SEG9

9

SEG10

10

SEG11

11

SEG12

12

SEG13

13

SEG14

14

SEG15

15

SEG16

16

SEG42

42

SEG41

41

SEG40

40

SEG39

39

SEG38

38

SEG37

37

SEG48

48

SEG47

47

SEG46

46

SEG45

45

SEG44

44

SEG43

43

SEG36

36

SEG35

35

SEG34

34

SEG33

33

SEG17

17

SEG18

18

SEG19

19

SEG20

20

SEG21

21

SEG22

22

SEG23

23

SEG24

24

SEG25

25

SEG26

26

SEG27

27

SEG28

28

SEG29

29

SEG30

30

SEG31

31

SEG32

32

INHB

61

VLCD1

57

VDD

56

SEG52/OSC

60

VSS

59

VLCD2

58

SEG51

55

SEG49

49

SEG50

50

COM1

54

COM2

53

COM3

52

COM4

51

CLOCK

GENERATOR

SEGMENT DRIVER

&

LATCH

COMMON

DRIVER

CS

62

SI

64

CLK

63

SHIFT

REGISTER

ADDRESS

DETECTOR

PWM

DRIVER

1 2 ... 36 37 38 39 40 41 42 43 44 45 46 ... 75 76

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