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1-8 (No.YA655<Rev.001>)

2.3.2 MAIN CPU PIN FUNCTION  [

IC7001

 : DIGITAL PWB]

Pin Pin name 

I/O  Function 

1

DGND

-

GND

2

NC

-

Not  used

3

NC

-

Not  used

4

VDD33

-

3.3V power supply

5

VSS33

-

GND

6

VDD18

-

1.8V power supply

7

VSS18

-

GND

8

V1_Y_SYNC

I

V sync for Input-1

9

PC_VD

I

V sync for PC

10

MOUT_CV

O Video for Monitor out

11

V1_CV

I

Video for Input-1

12

ADCVSSA

-

GND

13

V1_Y

I

Y for Input-1

14

ADCVDDA

-

3.3V power supply

15

PC_G

I

G for PC

16

VREFA

I

Reference voltage setting

17

VIN4A

I

Not used

18

VRPA

I

Reference voltage setting

19

V2_CV

I

Video for Input-2

20

VRMA

I

Reference voltage setting

21

TV_CVBS

I

Video for VHF/UHF tuner

22

ADCVSSB

-

GND

23

VIN1B

I

Not used

24

ADCVDDB

-

3.3V power supply

25

V1_PB

I

Pb for Input-1

26

VREFB

I

Reference voltage setting

27

PC_B

I

B for PC

28

VRPB

I

Reference voltage setting

29

VIN4B

I

Not used

30

VRMB

I

Reference voltage setting

31

VINFB

I

Not used

32

DVSSABC

-

GND

33

DVDDABC

-

3.3V power supply

34

VINMX

I

Not used

35

ADCVSSC

-

GND

36

VIN1C

I

Not used

37

ADCVDDC

-

3.3V power supply

38

V1_PR

I

Pr for Input-1

39

VREFC

I

Reference voltage setting

40

PC_R

I

R for PC

41

VRPC

I

Reference voltage setting

42

VRMC

I

Reference voltage setting

43

PLL1VDD33A

-

3.3V power supply

44

LPF1

I

LPF setting for PLL

45

PLL1VSS33A

-

GND

46

PLL1VDDD

-

3.3V power supply

47

PLL1VSSD

-

GND

48

VDD18

-

1.8V power supply

49

VSS18

-

GND

50

VDD33

-

3.3V power supply

51

VSS33

-

GND

52

NC

-

Not used

53

NC

-

Not used

54

DGND

-

GND

55

VCCQ10

-

1.0V power supply

56

MCLK

O Not used

57

SDITDO

O Data for SDI

58

SDITDI

I

Data for SDI

59

SDITCK

I

Clock for SDI

60

SDITRST

I

Reset for SDI

61

IISSD

O Not used

62

IISWS

O Not used

63

IISSCK

O Not used

64

VCCQ33

-

3.3V power supply

65

VREF1

I

Reference voltage setting

66

VREF2

I

Reference voltage setting

67

SIF

I

SIF for VHF/UHF tuner

68

SAVDD

-

3.3V power supply

69

SXIN

I

36.864MHz oscillation for sampling clock 

70

SXOUT

O 36.864MHz oscillation for sampling clock 

71

TEST0

I

Test mode setting [L fixed]

72

TEST1

I

Test mode setting [L fixed]

73

VCCQ10

-

1.0V power supply

74

SDITMS

I

Mode select for SDI

75

ROUT1

O Audio (Right) for Monitor out

76

VCOM

I

Reference voltage setting

77

LOUT1

O Audio (Left) for Monitor out

78

AVDDPLL

-

3.3V power supply

79

PLLXFCA

I

Filter setting for HDMI

80

AVSSPLL

-

GND

81

PLLXFCP

I

Filter setting for HDMI

82

AVSSPLL

-

GND

83

PLLXFCX

I

Filter setting for HDMI

84

AVSSPLL

-

GND

85

HDMI_PWR1

I

Power status detect for HDMI

86

HDMI_SCL

O Clock for I

2

C bus (for HDMI)

87

HDMI_SDA

I/O Data for I

2

C bus (for HDMI)

88

VSSE

-

GND

89

VDDE

-

3.3V power supply

90

AVDDHDMI

-

3.3V power supply

91

RXCN

I

TMDS clock for HDMI

92

RXCP

I

TMDS clock for HDMI

93

AVSSHDMI

-

GND

94

RX0N

I

TMDS data for HDMI

95

RX0P

I

TMDS data for HDMI

96

AVSSHDMI

-

GND

97

AVDDHDMI

-

3.3V power supply

98

AVSSHDMI

-

GND

99

RX1N

I

TMDS data for HDMI

100 RX1P

I

TMDS data for HDMI

101 AVDDHDMI

-

3.3V power supply

102 AVDDHDMI

-

3.3V power supply

103 RX2N

I

TMDS data for HDMI

104 RX2P

I

TMDS data for HDMI

105 AVSSHDMI

-

GND

106 EXTRES

I

For external resistor

107 PVDD

-

3.3V power supply

108 PVSS

-

GND

109 VCCQ10

-

1.0V power supply

110 MPSEL

I

Mode select for external operation [External = L]

Pin Pin name 

I/O  Function 

Summary of Contents for LT-26KM18/NSK

Page 1: ...SK COPYRIGHT 2008 Victor Company of Japan Limited FU2 CHASSIS LINEUP TABLE OF CONTENTS 1 PRECAUTION 1 3 2 SPECIFIC SERVICE INSTRUCTIONS 1 6 3 DISASSEMBLY 1 10 4 ADJUSTMENT 1 15 5 TROUBLESHOOTING 1 18 No YA587 LT 32EX18 SERIES No YA645 LT 32BX18 SERIES No YA649 LT 32BX38 SERIES No YA644 LT 32FX38 SERIES No YA645 LT 32BX38 SERIES No YA588 LT 42EX18 SERIES BASIC CHASSIS FU2 ...

Page 2: ...ls Horizontal 1366 pixels Vertical 768 pixels W XGA Audio Power Output 6 W 6 W Speaker 5 0 cm 12 0 cm oval type 2 Aerial terminal VHF UHF 75 Ω unbalanced coaxial Video Audio Input 1 2 Component Video 750p 1125i 625p 525p 625i 525i RCA pin jack 3 Y 1V p p Sync signal 0 35V p p 3 value sync 75 Ω Pb Pr 0 35V p p 75 Ω Y 1V p p Positive Negative sync provided 75 Ω Pb Pr 0 7V p p 75 Ω Video 1V p p Posit...

Page 3: ...onents that indicate evidence of overheating should be replaced Always use the manufacturer s replacement components 6 Isolation Check Safety for Electrical Shock Hazard After re assembling the product always perform an isolation check on the exposed metal parts of the cabinet antenna terminals video audio input and output terminals Control knobs metal cabinet screw heads earphone jack control sha...

Page 4: ...mages even when the unit is carefully packed To prevent accidents from occurring during transportation pay careful attention before delivery such as through explaining the handling instructions to transporters Ensure that the following requirements are met during transportation as the LCD panel of this unit is made of glass and therefore fragile 1 USE A SPECIAL PACKING CASE FOR THE LCD PANEL When ...

Page 5: ... TIME This model has a function to count and record the LCD panel operating time The operating time can be checked in the following procedure Maximum count time 131072 hours 1 Press the RETURN key and MUTING key simultaneous ly then enter the SERVICE MODE 2 When the Main Menu is displayed press 2 key to enter the self check mode 3 The operating time of the LCD panel is displayed in 6 digit decimal...

Page 6: ...is function ensures dull colours are compensated to produce natural hues AI VOLUME You can adjust the volume of all the channels and video inputs to the same level automatically depends on the strength of signal of the sources PULL DOWN This function displays a cinema film picture more smoothly and naturally on the screen 2 2 MAIN DIFFERENCE LIST Item LT 26KM18 NSK LT 26KM28 NSK Cabinet Colour Bla...

Page 7: ...ightness twice as brighter as originally lighting For checking this pixel fault input 100 of each R G B colour and find out the cell that is not lighting FLICKER FAULT In the pixel fault a cell that should light originally or not light originally is flashing on and off For checking this pixel fault input ALL BLACK SCREEN signal or 100 of each RGB colour and find out the cell that is flashing on an...

Page 8: ... used 57 SDITDO O Data for SDI 58 SDITDI I Data for SDI 59 SDITCK I Clock for SDI 60 SDITRST I Reset for SDI 61 IISSD O Not used 62 IISWS O Not used 63 IISSCK O Not used 64 VCCQ33 3 3V power supply 65 VREF1 I Reference voltage setting 66 VREF2 I Reference voltage setting 67 SIF I SIF for VHF UHF tuner 68 SAVDD 3 3V power supply 69 SXIN I 36 864MHz oscillation for sampling clock 70 SXOUT O 36 864MH...

Page 9: ...3 3V power supply 163 SDA1 I O Data for I2 C bus for tuner audio 164 VCCQ33 3 3V power supply 165 SCL1 O Clock for I2C bus for tuner audio 166 SDA0 I O Data for I2 C bus for EEPROM Pin Pin name I O Function 167 SCL0 O Clock for I2 C bus for E2PROM 168 VCCQ33 3 3V power supply 169 AUDIO_MUTE O Speaker monitor output muting Muting H 170 REMOTE I Remote control sensor input 171 MAIN_POW O Power on of...

Page 10: ...INAL COVER 3 Remove the 4 screws J 4 Remove the DIGITAL PWB 3 1 6 REMOVING THE SW PWB CONTROL ASSY Fig 3 1 Remove the REAR COVER 1 Remove the 2 screws K 2 Remove the SW PWB 3 Remove the 2 screws L 4 Remove the CONTROL ASSY 3 1 7 REMOVING THE INVERTER PWB Fig 3 1 Remove the REAR COVER 1 Remove the 6 screws M 2 Remove the INVERTER PWB COVER 3 Remove the INVERTER PWB 3 1 8 REMOVING THE SPEAKER Fig 3 ...

Page 11: ...N N N N X X X X STAND FRONT PANEL CONTROL ASSY SW PWB SPEAKER HOLDER SPEAKER HOLDER SPACER SPEAKER SPEAKER LCD PANEL UNIT TOP FRAME LCD CONTOROL PWB LCD CONTOROL PWB COVER INVERTER PWB COVER BOTTOM FRAME IR LED PWB MAIN BASE TERMINAL BASE STAND BASE COVER POWER CORD COVER POWER CORD ANALOG PWB DIGITAL PWB POWER PWB REAR COVER CHOKE COIL INVERTER PWB ...

Page 12: ...G INSTRUCTIONS and set the items as described 7 SERVICE MODE SETTING ADJUST MODE SETTING Verify what to set in the SERVICE MODE and set whatever is necessary Fig 3 3 Refer to the SERVICE ADJUSTMENT for setting Input PAL White Raster signal 75 Y 525 mV and SYNC 0 3 V at VDO 2 for adjustment SERVICE MODE SCREEN Fig 3 3 SYSTEM CONSTANT SETTING Symbol Number of pins Mounting PWB Main content of data I...

Page 13: ...Depends on PR CH EXT Auto Zoom Auto Panoramic Setting item Setting position STEREO I II Stereo sound Bass Centre Treble Centre Balance Centre Cinema Surround Off Setting item Setting position On Timer Off Sleep Timer Off Channel Guard Off ID 0000 Blue Back On Child Lock Off Auto Shutoff Off Favourite Setting Blank Power Lamp On Eco Mode Off Setting item Setting position Auto Program TV channel aut...

Page 14: ...th the tweezers and remove the chip part Transistors diodes variable resistors etc 1 Apply extra solder to each lead 2 As shown in the figure push the part with tweezers and alternately melt the solder at each lead Shift and remove the chip part NOTE After removing the part remove remaining solder from the pattern 2 How to install Chip parts Resistors capacitors etc 1 Apply solder to the pattern a...

Page 15: ...in the adjustment items preset the following functions with the REMOTE CONTROL UNIT 4 3 MEASURING INSTRUMENT AND FIXTURES Signal generator Pattern generator PAL Remote control unit 4 4 BASIC OPERATION OF SERVICE MODE 4 4 1 HOW TO ENTER THE SERVICE MODE 1 Press RETURN key and MUTING key on the remote control unit simultaneously to enter the SERVICE MODE SCREEN 4 4 2 HOW TO EXIT THE SERVICE MODE Pre...

Page 16: ...0Hz SECAM SECAM NTSC3 NTSC3 58 NTSC4 NTSC4 43 525I 525i 525P 525p 625I 625i 625P 625p 750P5 750p 50Hz 750P6 750p 60Hz 1125I5 1125i 50Hz 1125I6 1125i 60Hz 1125P5 1125P 50Hz 1125P6 1125P 60Hz Others HXGA HDMI XGA SERVICE MODE SCREEN Press 1 key 1 SIGNAL SYSTEM 2 ZOOM MODE 7 SETTING VALUE DATA 5 SETTING ITEM No 6 SETTING ITEM 4 WHITE BALANCE 3 PICTURE MODE S001 R DRIVE MID 128 NTSC3 FULL STD M ADJUST...

Page 17: ...024 Do not adjust S005 G DRIVE COOL 0000 0255 009 Do not adjust S006 B DRIVE COOL 0000 0255 000 Do not adjust S007 R DRIVE WARM 0000 0255 000 Do not adjust S008 G DRIVE WARM 0000 0255 006 Do not adjust S009 B DRIVE WARM 0000 0255 019 Do not adjust Item Measuring instrument Test point Adjustment part Description WHITE BALANCE HIGHLIGHT Remote control unit Signal generator 1 ADJUST S001 R DRIVE MID ...

Page 18: ...eck display mode To Clear Reset Failure History Turn off the power by pressing the POWER key on the remote control unit when in the Self check display mode 5 1 4 FAILURE HISTORY Failure history can be counted up to 9 times for each item When the number exceeds 9 display will remain as 9 Failure history will be stored in the memory unless it has been deleted NOTE Only SYNC with without sync signals...

Page 19: ...on starts 3 seconds after the power is turned on If it checks whenever I2C communication is performed and no reply of ACK signal an error will be counted AUDIO AIO Confirmation of reply of ACK signal which uses I2C communication IC6002 DIGITAL PWB SDA Detection starts 3 seconds after the power is turned on If it checks whenever I2 C communication is performed and no reply of ACK signal an error wi...

Page 20: ... No YA655 Rev 001 VPT Printed in Japan Victor Company of Japan Limited Display Division 12 3 chome Moriya cho Kanagawa ku Yokohama city Kanagawa prefecture 221 8528 Japan ...

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