2.3TECHNINAL INFORMATION

2.3.1 MAIN MI-COM (CPU) PIN FUNCTION

Pin

Pin name

I/O

Function

Pin

Pin name

I/O

Function

No.

No.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

VssP2

-

GND

65

SVM

O

Not used

2

VssC4

-

GND

66

FbiSo

I

Flyback input/sandcastle output

3

V1.8C4

I

1.8V (Digital)

67

Hout

O

Horizontal output

4

V3.3A3

I

3.3V

68

VssComb

-

GND

5

VrefP_Sdac

I

3.3V (Positive)

69

V5Comb

I

5V

6

VrefN_Sdac

-

GND

70

Vin/R2/Pr

I

PIP R input

7

VrefP_Sdac

I

3.3V (Negative)

71

Uin/B2/Pb

I

PIP B input

8

VrefN_Sdac

-

GND

72

Yin/G2/Y

I

PIP G input

9

VrefP_Sdac

I

3.3V (Positive)

73

Ysync

I

Not used

10

XtalIn

I

24.576MHz for system clock

74

Yout

O

Not used

11

XtalOut

O

24.576MHz for system clock

75

Uout/INSSW2

I

YUV insertion input

12

VssA1

-

GND

76

NC

O

Not used

13

NECK

I

V-guard input/ I/O switch

77

INSSW3

I

YUV insertion input

14

CONT

I

1.8V regulator control

78

R3/Pr

I

Component PR input (Video-2)

15

V5P1

I

+5V

79

G3/Y

I

Component Y input (Video-2)

16

Ph2

-

Phase-2 filter

80

B3/Pb

I

Component PB input (Video-2)

17

Ph1

-

Phase-1 filter

81

Gnd3

-

GND

18

Gnd1

-

GND

82

V5P3

I

5V

19

SecPll

-

SECAM PLL decoupling

83

BCL

I

Beam current limiter input

20

Dec8G

-

Bandgap decoupling

84

BLKIN

I

Black current input

21

EW

O

East-West drive output

85

Rout

O

R output

22

VDRB-

O

Vertical drive B output

86

Gout

O

G output

23

VDRA+

O

Vertical drive A output

87

Bout

O

B output

24

Vif1

I

Video IF input 1

88

V3.3A1

I

3.3V

25

Vif2

I

Video IF input 2

89

RefAdN

-

GND

26

Vsc

-

Vertical sawtooth capacitor

90

V3.3RefAdP

I

3.3V (Positive)

27

Iref

I

Reference current input

91

RefAd

I

3.3/2V

28

GndIF

-

GND

92

GndA

-

GND

29

Sif1

I

Sound IF input 1

93

V1.8A

I

1.8V

30

Sif2

I

Sound IF input 2

94

V3.3A2

I

3.3V

31

AGC

O

Tuner AGC output

95

VssADC

-

GND

32

EHT

I

EHT/overvoltage protection input

96

V1.8ADC

I

1.8V

33

Ssif/RefIn/Avl/

O

Automatic Volume Levelling/ sound IF input / subcar-

97

REMOTE

I

Remote control

 

RefOut

 

rier reference output / external reference signal input

 

 

 

 

 

 

 

for I signalmixer for DVB operation

 

 

 

 

34

L3

I

Audio-L3 input (left signal)

98

PW_LED

I

POWER LED control

35

R3

I

Audio-R3 input (right signal)

99

PW_LED

I

POWER LED control

36

L-OUT

O

Audio L output

100

V1.8C2

I

1.8V

37

R-OUT

O

Audio R output

101

VssC2

-

GND

38

DecsDem

-

Decoupling sound demodulator

102

TIMER

-

Not used

39

QssO/AmO/

O

QSS intercarrier output / AM output / deemphasis /

103

TIMER

-

Not used

 

AudeEm

 

(front-end audio out)

 

 

 

 

40

Gnd2

-

GND

104

VER_PROTECT

O

X-ray protect

41

PllIf

-

IF-PLL loop filter

105

S_REDUCE

O

Sound control

42

SifAgc

-

AGC sound IF

106

P00/I2SDI1

O

Not used

43

IfVo/FmRo/DvbO

O

Not used

107

POWER

O

SUB POWER control

44

NC

O

Not used

108

SCL1

I

I2C bus clock

45

V8AudioSwitches

I

8V

109

SDA1

I/O

I2C bus data

46

AgcSsif

-

AGC capacitor second sound IF

110

V3.3P

I

3.3V

47

V5P2

I

5V

111

ROTATION

O

Rotation

48

V-OUT

O

Video output

112

3.58/OTHER

O

NTSC 3.58 detection

49

L1

I

Audio-L1 input

113

A_MUTE

O

Audio muting

50

R1

I

Audio-R1 input

114

4.5/OTHER

O

NTSC 4.43 detection

51

V3

I

Video V3 input

115

PROT

I

Protect

52

C4

I

Not used

116

ECO_IN

I

ECO sensor level detection

53

Audio2InL

I

Not used

117

V1.8C1

I

1.8V (Digital)

54

Audio2InR

I

Not used

118

DecV1V8

I

1.8V

55

V2/Y

I

Video V2 input

119

KEY_IN

I

Key scan data

56

L2

I

Audio L2 input (Left signal)

120

VDO-DET

I

Video DET input

57

R2

I

Audio R2 input (right signal)

121

VSSC1+P1

-

Digital GND

58

Y3/Cvbs

I

S-Video Y1 input

122

S_V_DET

I

S-Video DET input

59

C1

I

S-Video C1 input

123

P25/PWM4

O

GTVA_reset

60

AudioLsL

O

Audio L output for audio power amplifier

124

V1.8C3

I

1.8V (Digital)

61

AudioLsR

O

Audio R output for audio power amplifier

125

VssC3

-

GND

62

HP-L

O

Not used

126

P12/Int2

I

External interrupt

63

HP-R

O

Not used

127

SDA0

I/O

I2C bus data (for memory)

64

CVBSO/PIP

O

CVBS / PIP output

128

SCL0

I

I2C bus clock (for memory)

(No.YA476)1-5

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JVC AV-29MXP6/V, AV-25MXP6/V, AV-21MXP6/V service manual Techninal Information Main MI-COM CPU PIN Function, No.YA4761-5
Page 4 Page 6

AV-29MXP6/V, AV-21MXP6/V, AV-25MXP6/V specifications

The JVC AV-25MXP6/V, AV-21MXP6/V, and AV-29MXP6/V are a trio of high-performance CRT televisions that represent a combination of cutting-edge technology and practical design, catering to the diverse needs of home entertainment enthusiasts. These models are characterized by their impressive picture quality, robust build, and user-friendly features, making them a prominent choice during their production era.

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