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JVC AV-21D114, Service Manual

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SERVICE MANUAL

COPYRIGHT © 2005 Victor Company of Japan, Limited

No.YA153

2005/2

COLOUR TELEVISION

YA153

2005

2

AV-21D114

/B

TABLE OF CONTENTS

1

PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1-3

2

SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1-4

3

DISASSEMBLY  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1-7

4

ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1-13

5

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1-27

BASIC CHASSIS

CW

Summary of Contents for AV-21D114

Page 1: ...tor Company of Japan Limited No YA153 2005 2 COLOUR TELEVISION YA153 2005 2 AV 21D114 B TABLE OF CONTENTS 1 PRECAUTION 1 3 2 SPECIFIC SERVICE INSTRUCTIONS 1 4 3 DISASSEMBLY 1 7 4 ADJUSTMENT 1 13 5 TROUBLESHOOTING 1 27 BASIC CHASSIS CW ...

Page 2: ... 40MHz 4 25MHz SECAM Aerial Input Terminal 75Ω unbalanced coaxial Power Input AC110V AC240V 50Hz 60Hz Operating voltage AC90V AC260V Power Consumption 81W Max 57W Avg Picture Tube A51LZM10X 21 inch aspect ratio 4 3 conventional square face type tinted Screen Size Visible size 50 5cm Diagonal 42 0cm 32 0cm H V High Voltage 26 5kV 1 5kV at zero beam current Speaker 5cm 12cm Oval type 2 Audio Output ...

Page 3: ...ments or alternatives approved by the manufacturer of the complete product 7 Do not check high voltage by drawing an arc Use a high voltage meter or a high voltage probe with a VTVM Discharge the picture tube before attempting meter connection by connecting a clip lead to the ground frame and connecting the other end of the lead through a 10kΩ 2W resistor to the anode button 8 When service is requ...

Page 4: ...UTO PROGRAM the TV stations can be selected automatically and the TV channels can also be rearranged automatically Built in OFF TIMER RETURN 2 2 FUNCTIONS REMOTE CONTROL UNIT RM C1261 2H 1 2 3 4 5 6 7 8 9 10 11 SOUND SYSTEM key COLOUR SYSTEM key FAVORITE CHANNEL keys TV VIDEO key PICTURE MODE key OFF TIMER key RETURN key DISPLAY BACK key CHANNEL keys POWER key 12 13 14 15 16 17 Number keys key MEN...

Page 5: ...NEL buttons VOLUME buttons Remote control sensor TIMER lamp POWER lamp MAIN POWER button 4 5 6 7 8 9 10 3 2 1 1 HEADPHONE jack CHANNEL VOLUME POWER MENU OK TIMER VIDEO AUDIO IN VIDEO 2 VIDEO 1 INPUT VIDEO AUDIO OUTPUT 2 3 4 5 VIDEO 1 INPUT TERMINAL VIDEO AUDIO OUTPUT TERMINAL VIDEO AUDIO Aerial input terminal 1 3 1 2 4 5 ...

Page 6: ...I Audio R2 input right signal 58 Y3 Cvbs I S Video Y1 input 59 C1 I S Video C1 input 60 AudioLsL O Audio L output for audio power amplifier 61 AudioLsR O Audio R output for audio power amplifier 62 HP L O Headphone L 63 HP R O Headphone R 64 CVBSO PIP O CVBS PIP output 65 SVM O Scan velocity modulation output 66 FbiSo I Flyback input sandcastle output 67 Hout O Horizontal output 68 VssComb GND 69 ...

Page 7: ...ER 1 Remove the 4 screws C as shown in Fig 1 2 Follow the same steps when removing the other hand SPEAKER 3 1 4 CHECKING THE MAIN PW BOARD To check the back side of the MAIN PWB 1 Pull out the MAIN PWB Refer to REMOVING THE MAIN PW BOARD 2 Erect the MAIN PWB vertically so that you can easily check its back side CAUTIONS Before turning on power make sure that the CRT earth wire and other connectors...

Page 8: ...1 8 No YA153 Fig 1 PICTURE TUBE FBT MAIN PWB CRT SOCKET PWB C SPEAKER C SPEAKER MAIN PWB FRONT CABINET x4 x4 REAR COVER B A x2 x7 ...

Page 9: ...ck whether the setting values of the SYSTEM CONSTANT SET are the same as those indicated in Table 1 If the value is different select the setting item with the MENU key and set the correct value with the MENU key 4 Press the DISPLAY key twice to return to the normal screen 5 Receive channel setting Refer to the OPERATING INSTRUCTIONS and set the receive channels channels preset 6 User setting Check...

Page 10: ... BLUE BACK MUTE COLOUR AUTO ECO SENSOR SURROUND PICTURE BOOSTER COMPONENT PIP S INPUT THAI NO NO NO MONO YES NO NO NO YES NO NO NO Setting item Setting content Setting value YES NO YES NO YES NO YES NO YES NO YES NO YES NO STEREO PB MONO YES NO YES NO YES NO YES NO YES NO SINGLE NO PAT MULTI TRIPLE PAL THAI NO LANGUAGE E T NO E T ...

Page 11: ...ANCE COOL AI VOLUME ON FAVORITE CH RED PR01 FAVORITE CH GREEN PR02 FAVORITE CH YELLOW PR03 FAVORITE CH BLUE PR04 Setting item Setting value 1 IF 1 VCO 2 DELAY POINT 2 V C 1 SCREEN DATA 2 CUTOFF B G 3 WDR R G B 4 BRIGHT TV VDO 1 2 5 CONT TV VDO 1 2 6 COLOUR TV VDO1 2 7 TINT TV VDO 1 2 8 SHARP Do not adjust 9 Y DELAY Do not adjust 10 TINT DVD Do not adjust 11 AMP T SHARP 3 AUDIO Do not adjust 1 DCXO...

Page 12: ...he 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 as in...

Page 13: ...s otherwise specified in the adjustment instructions preset the following functions with the remote control unit User mode setting position 4 3 MEASURING INSTRUMENT AND FIXTURES 1 DC voltmeter or Digital voltmeter 2 Oscilloscope 3 Signal generator Pattern generator PAL SECAM NTSC 4 Remote control unit 4 4 ADJUSTMENT ITEMS B1 VOLTAGE FOCUS ADJUSTMENT IF CIRCUIT ADJUSTMENTS IF VCO adjustment DELAY P...

Page 14: ...Y2 4 X RAY1 5 GND UPPER FOCUS DEF YOKE IC702 MAIN PWB ASS Y CRT SOCKET T 6 1 4 1 FRONT HVT MAIN PWB ASS Y 1 6 1 4 1 1 4 5 X 1 6 C U LOWER SCREEN TU001 S901 S805 S803 S801 S804 S802 J807 J806 J801 J802 IC701 CN00S T PW DEG POWER CORD TP E E1 TP 47B POWER SW TP 47R CN00C 1 5V 2 SCL0 3 SDA0 4 SCL1 5 SDA1 6 GND I2 C GND 5V GND B1 ...

Page 15: ... entering adjusting the setting values adjustment values of the IF circuit 2 V C For entering adjusting the setting values adjustment values of the VIDEO circuit 3 AUDIO For entering adjusting the setting values adjustment values of the AUDIO circuit 4 DEF For entering adjusting the setting values adjustment values of the DEFLECTION circuit 5 VSM W B For setting the values of STANDARD SOFT BRIGHT ...

Page 16: ...VD 11 AMP T SHARP 3 AUDIO PAL 1 SCREEN HBC WBC BRI V C 000A 0002 0009 5 VSM W B 1 BRIGHT VSM PRESET BRIGHT 4 DEF 1 V SHIFT DEF FULL 50Hz 1 BRIGHT 2 CONT 3 COLOUR 4 SHARP 5 HUE 1 R DRIVE 2 G DRIVE 3 B DRIVE Setting item 1 V SHIFT 2 V SLOPE 3 V SIZE 4 H CENT 5 H SIZE 6 TRAPEZ 7 EW PIN 8 COR UP 9 COR LO 10 ANGLE 11 BOW 12 V S CR 13 V LIN 14 V ZOOM 15 V SCROLL Setting item 1 IF 3 AUDIO 5 VSM W B 7 PLU...

Page 17: ...3 Make sure that the picture is in focus even when the screen gets darkened Item Measuring instrument Test point Adjustment part Description IF VCO check Remote control unit 1 IF 1 VCO CW Note Under normal conditions no adjustment is required 1 Receive a broadcast signal 2 Select 1 IF from the SERVICE MENU 3 Select 1 VCO 4 Check the characters colour of the JUST REFERENCE displayed to yellow 5 Pre...

Page 18: ...8 VIDEO 0 63 48 48 48 48 9 Y DELAY RF 0 15 5 5 VIDEO 0 15 5 5 5 5 10 TINT DVD VIDEO 0 63 34 31 33 33 11 AMP T SHARP RF VIDEO 0 63 0 0 0 0 Item Measuring instrument Test point Adjustment part Description WHITE BALANCE Low light adjustment Signal generator Remote control unit 2 V C 2 CUTOFF B 2 CUTOFF G SCREEN VR In HVT Note Set PICTURE MODE VSM to BRIGHT 1 Receive a PAL black and white signal colou...

Page 19: ...Select 2 V C from the SERVICE MENU 3 Select 4 BRIGHT 4 Set the initial setting value 5 If the brightness is not best with the initial setting value make fine adjustment until you get the best brightness 6 Press the DISPLAY key twice to return to the normal screen SUB CONTRAST adjustment Remote control unit 2 V C 5 CONT Notes Proceed to the following adjustment after having completed the SUB BRIGHT...

Page 20: ...illoscope Remote control unit TP 47G TP E CRT SOCKET PWB 2 V C 6 COLOUR Method of adjustment using measuring instrument Notes Proceed to the following adjustment after having completed the SUB CONTRAST adjustment Set PICTURE MODE VSM to BRIGHT PAL COLOUR 1 Receive a PAL colour bar signal full field colour bar 75 white 2 Select 2 V C from the SERVICE MENU 3 Select 6 COLOUR 4 Set the initial setting...

Page 21: ...values are automatically set for NTSC 4 43 TINT SUB TINT 2 adjustment Signal generator Oscilloscope Remote control unit TP 47G TP E CRT SOCKET PWB 2 V C 7 TINT Method of adjustment using measuring instrument Notes Proceed to the following adjustment after having completed the SUB CONTRAST adjustment Set PICTURE MODE VSM to BRIGHT NTSC 3 58 TINT 1 Input a NTSC 3 58 colour bar signal full field colo...

Page 22: ...1 32 0 12 V S CR 0 63 32 31 32 0 13 V LIN 0 63 32 31 32 0 14 V ZOOM 0 63 32 31 30 0 15 V SCROLL 0 63 32 31 32 0 Item Measuring instrument Test point Adjustment part Description V SLOPE adjustment Signal generator Remote control unit 4 DEF 2 V SLOPE PAL V SLOPE 1 Receive a PAL circle pattern signal of vertical frequency 50Hz 2 Select 4 DEF from the SERVICE MENU 3 Select 2 V SLOPE 4 Set the initial ...

Page 23: ... 13 V LIN 5 Set the initial setting value of 13 V LIN 6 Adjust 12 V S CR and 13 V LIN so that the spaces of each line on TOP CENTRE and BOTTOM become uniform NTSC V LINEARITY 1 Input a NTSC crosshatch signal 2 Make similar adjustment of NTSC V S CR in the same way as for PAL V S CR H PARALLEL adjustment Signal generator Remote control unit 4 DEF 10 ANGLE PAL H PARALLEL 1 Receive a PAL crosshatch s...

Page 24: ... DRIVE 3 B DRIVE 1 Select 5 VSM W B from the SERVICE MENU 2 Select BRIGHT with the MENU OK key 3 Set the value of 1 BRIGHT 5 HUE to the values shown in the table 4 Respectively select the VSM PRESET mode for SOFT and STANDARD 5 Select COOL with the MENU OK key 6 Set the values of 1 R DRIVE 3 B DRIVE to the value shown in the table 7 Select the W B preset for WARM and NORMAL respectively 8 Press th...

Page 25: ...ition them horizontally Fig 2 7 Adjust the gap between two lugs so that the GREEN RASTER will come into the centre of the screen Fig 3 8 Move the deflection yoke forward and fix the position of the deflection yoke so that the whole screen will become green 9 Insert the wedge to the top side of the deflection yoke so that it will not move 10 Input a crosshatch signal 11 Verify that the screen is ho...

Page 26: ...VERGENCE ADJUSTMENT 1 Move the deflection yoke up and down and overlap the lines in the periphery Fig 2 2 Move the deflection yoke left to right and overlap the lines in the periphery Fig 3 3 Repeat 1 and 2 above and make best convergence 4 Adjust XV by XV coil Fig 4 After adjustment fix the wedge at the original position Fasten the retainer screw of the deflection yoke Fix the P C magnets with gl...

Page 27: ...Method of detection State of abnormality B1 over current protection An over current on the low B1 line is detected The main microcomputer detects the possible abnormality at 24 msec intervals and judges the results in every 16 time Of the 16 times if NG is detected more than 9 times it is judged that there is an abnormality When an abnormality has been detected the SUB POWER is turned off While th...

Page 28: ...1 28 No YA153 ...

Page 29: ... No YA153 AV MULTIMEDIA COMPANY VIDEO DISPLAY CATEGORY 12 3 chome Moriya cho kanagawa ku Yokohama kanagawa prefecture 221 8528 Japan Victor Company of Japan Limited VPT Printed in Japan ...

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