DOWNLOAD Sharp 28JW-74H (serv.man11) Service Manual ↓ Size: 163.55 KB | Pages: 15 in PDF or view online for FREE

 Refer to Pin Circuits (chapter 6.6. on page 157)

Stresses beyond those listed in the “Absolute Maximum Ratings” may cause permanent damage to the device. This
is a stress rating only. Functional operation of the device at these or any other conditions beyond those indicated in
the “Recommended Operating Conditions/Characteristics” of this specification is not implied. Exposure to absolute
maximum ratings conditions for extended periods may affect device reliability.

T

A

Ambient Operating Temperature

−

65

°C

T

S

Storage Temperature

−40

125

°C

P

TOT

Total Power Dissipation

−

1400

mW

VSUP

x

Supply Voltage

VSUP

x

−0.3

6V

V

I

Input Voltage, all Inputs

−0.3

VSUP

x

+0.3

V

V

O

Output Voltage, all Outputs

−0.3

VSUP

x

+0.3

V

V

IO

Input/Output Voltage, all Open Drain Out-
puts

−0.3

6V

Fig. 1–2: Block diagram of the VCT 38xxA/B (shaded blocks are optional)

The block diagram does not show the additional features of VCT 38xxB.

Video 

Front-end

Comb 

Filter

Color 

Decoder

Display 

Processor

Video 

Back-end

Panorama 

Scaler

4

3

4

12

31

2

I

2

C Master

3 kB
OSD

96kB 

CPU ROM

TPU

DMA

CPU

24 IO Ports

Watchdog

2 CapCom

2 Timer

15:1 Mux
10-bit ADC

8-bit PWM

Audio

3

2

Clock 

Oscillator

1 kB 

CPU RAM

XTAL1

XTAL2

VIN

AIN

Px

y

ADB, DB, CB

RGBOUT

RGBIN

VE

R

T

PR

OT

HFLB

SE

N

S

E

I

2

C

XR

E

F

HOUT

VR

D

VR

T

SG

N

D

Color, Prio

MSync

I

2

C

VSUPAB

VS

U

PP1

GN

D

P

1

Reset 

Logic

RESQ

VS

U

P

S

TEST

GNDAB

VS

U

P

A

F

VS

U

P

D

GNDA

F

GNDD

RS

W

2

GNDM

EW

8

14-bit PWM

2

2

3

CIN

SVM

Vi

d

e

o

GNDS

CLK20

RDY

BE

24 

kB

AOUT

VSync

VOUT

24 kB ROM

3 kB 

OSD RAM

Pict.Improv

16kB 

Text 

RAM

Fig. 6–4: PMQFP128 package

48

113

AIN2

114

AIN1

115

AOUT2

116

AOUT1

117

RESQ

118

SCL

119

SDA

120

XTAL1

121

XTAL2

122

VSUPS

123

GNDS

124

WE1Q

125

WE2Q

126

OE1Q

127

OE2Q

128

ADB18

CBIN

VSUPAF

47

GNDAF

46

SGND

45

VRT

44

VOUT

43

P10/VIN5

42

P11

41

P12

40

P13

39

GNDP1

38

VSUPP1

37

P14

36

P15

35

P16

34

P17

33

VSUPADB

GNDADB

ADB16

ADB15

ADB14

ADB13

ADB12

ADB11

ADB10

ADB17

ADB9

ADB8

1

2

3

4

5

67

8

9

10 11 12 13 14 15 16

17 18 19 20 21 22 23 24

9695 94 93 92 91 90 89 88 87 8685 84 83 82 81 80 79 78 77 7675 74 73

25 2627 28 29 30 31 32

ADB7

ADB6

ADB5

VSUPADB

ADB1

ADB0

DB0

DB1

DB2

DB3

VSUPDB

GNDDB

DB4

DB5

DB6

DB7

ADB2

ADB3

ADB4

GNDADB

72 71 70 69 68 67 66 65

49

CIN1

50

CIN2/CRIN

51

VIN1

52

VIN2

53

VIN3

54

VIN4

55

DISINTROM

56

P27

57

P26

58

P25

59

P24

60

VSUPP2

61

GNDP2

62

P23

63

P22

64

P21

97

VERTQ

98

VERT

99

EW

100

SENSE

101

GNDM

102

RSW1

103

RSW2

104

SVMOUT

105

ROUT

106

GOUT

107

BOUT

108

VSUPAB

109

GNDAB

110

VRD

111

XREF

112

AIN3

SAFETY

VPROT

BIN

GIN

RIN

FBLIN

TEST

P30

P31

HFLB

P32

P33

GNDP3

VSUPP3

P34

P35

HOUT

CLK20

VB0

VB1

VB2

VB3

VB4

VB5

VB6

VB7

VBCLK

P20

VSUPD

GNDD

P37

P36

1

-V

CC

Negative supply

2

-V

CC

Negative supply

3

-V

CC

Negative supply

4

OUT

PWM Output

5

CFLY+

Flyback capacitor

6

CFLY-

Flyback capacitor

7

BOOT

Bootstrap capacitor

8

VREG

Internal voltage regulator

9

FEEDCAP

Feed-back integrating capacitor

10

FREQ

Frequency setting resistor

11

SGND

Signal Ground

12

IN-

Error amplifier inverting input

13

IN+

Error amplifier non-inverting input

14

EA out

Error amplifier output

15

+V

CC

Positive supply

16

+V

CC

POW

Positive Power supply

17

-VccPOW

Negative Power supply

18

-V

CC

Negative supply

19

-V

CC

Negative supply

20

-V

CC

Negative supply

20

19

18

17

16

15

14

13

12

11

1

2

3

4

5

6

7

8

9

10

-V

CC

-V

CC

-V

CC

-V

CC

-V

CC

-V

CC

-V

CC

POW

+ V

CC

POW

+V

CC

EAout

IN+

IN-
SGND

OUT

CFLY +

CFLY -

BOOT

VREG

FEEDCAP

FREQ

(refer to Figure 1 on page 3)

Tamb = 25

°

C unless otherwise specified, Vcc =

±

12V, f

vert

=50Hz

Note: 1

Input voltage = 0, measured after the filter (e.g. accross the 470 nF filter capacitor)

Note: 2

Supply rejection of the positive or negative power supply. Vcc ripple =1Vpp, f=100Hz, measured on the sense
resistor.

Note: 3

Power dissipated in the circuit in the case of the application from Figure 1 and the current in the deflection
yoke adjusted to 2.5App. The corresponding power dissipated in the vertical deflection yoke is 2.8W.

+Vcc

Positive supply range

+10

+18

V

-Vcc

Negative supply range

-18

-10

V

∆

Vcc

Maximum recommended difference
between +Vcc and

±

4

V

Vcc

start

Low Vcc detection

±

6.5

V

Iq

Quiescent supply current

Input voltage = 0

14

mA

Iy

Maximum recommended vertical
yoke current

±

1.25

A

I

13

, I

12

Amplifier Input bias current

-0.1

µ

A

V

OS

Output Offset voltage

Note 1

-50

+50

mV

SVR

Supply voltage rejection

Note 2

82

dB

Fly

thr

Flyback detection threshold
(positive slope)

V(14)

1.5

V

Fly

thf

Flyback detection threshold
(negative slope)

V(14)

0.5

V

Pd

Integrated circuit
Dissipated power

Note 3

1.1

W

Fsw

Switching frequency

R

freq

= 10k

Ω

120

140

160

kHz

Fsw - op

Switching frequency operative range

100

200

kHz

R

freq

Frequency controller resistor range

Pin 10

7

10

14

k

Ω

Vcc

–

Flyback

Flyback

Output

Modulator

+

_

drive

generator

detection

+VCC

+VCC power

CFLYBACK

CFLY+

100nF

VREG

IN+

IN -

1k

Ω

10k

Ω

EA out

-VCC power

-VCC

-VCC

BOOT

Cboot

470nF

10k

Ω

4.7nF

FREQ

FEEDCAP

SGND

Pins 1,2,3,18,19,20

OUT

0.5

Ω

Deflect.

Yoke*

CFLY-

+VCC

1mH

Input signal

1k

Ω

220nF

-VCC

100nF

100nF

1000

µ

F

1000

µ

F

STV9380

100

µ

F

14

11

9

17

560pF

150

Ω

200

Ω

15

16

8

5

6

7

4

13

12

150

Ω

10

Vref

-VCC

470pF

* Deflection yoke characteristics: R = 5.5

Ω

, L = 7mH

100nF

Sense

resistor

f

vert

= 50Hz