JVC AV-29JS25, AV-29MS25, AV-29MX7 Service Manual Download Page 9 | Manualshive

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(No.YA281)1-9

Fig.3

CRT
SOCKET PWB

FRONT CONTROL
PWB (1/2)

FRONT CONTROL PWB (2/2)

MAIN PWB

FBT

CHASSIS
BASE

CONTROL BASE

(

X

4)

(

X

16)

A

PICTURE TUBE

D

C

AV TERMINAL
BOARD

FRONT CABINET

CHASSIS
BASE

CONTROL BASE

[FRONT SIDE]

E

F

(X2)

G

SPEAKER

(X2)

G

SPEAKER

Fig.2

Fig.4

CLAW B

CLAW B
(under side)

(under side)

REAR COVER

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...
7
8
9
10
11
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Summary of Contents for AV-29JS25, AV-29MS25, AV-29MX7

Page 1: ...Japan Limited No YA281 2005 8 FLAT COLOUR TELEVISION YA281 2005 8 AV 29JS25 AV 29WX25 G TABLE OF CONTENTS 1 PRECAUTION 1 3 2 SPECIFIC SERVICE INSTRUCTIONS 1 4 3 DISASSEMBLY 1 6 4 ADJUSTMENT 1 14 5 TROUBLESHOOTING 1 34 BASIC CHASSIS CW2 EXIT RM C1286 ...

Page 2: ...B G 32 5MHz 5 5MHz M 33 5MHz 4 5MHz Colour Sub Carrier Frequency 4 43MHz PAL 4 40MHz 4 25MHz SECAM 3 58MHz 4 43MHz NTSC Aerial Input Terminal 75Ω unbalanced coaxial Power Input AC110V AC240V 50Hz 60Hz Power Consumption 167W Max 109W Avg Picture Tube 29 inch aspect ratio 4 3 flat square face type tinted Screen Size Visible size 67 6cm Diagonal 55 4cm 41 4cm H V High Voltage 32 5kV Max 31 5kV Typ 30...

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: ...I2C bus control utilizes single chip ICs By means of AUTO PROGRAM the TV stations can be selected automatically and the TV channels can also be rearranged automatically Built in DIGITAL ECO MODE ECONOMY ECOLOGY In accordance with the brightness in a room the brightness and or contrast of the picture can be adjusted automatically to make the optimum picture which is easy on the eye Built in OFF TIM...

Page 5: ...2 input Left signal 57 R2 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 Not used 63 HP R O Not used 64 CVBSO PIP O CVBS PIP output 65 SVM O Not used 66 FbiSo I Flyback input sandcastle output 67 Hout O Horizontal output 68 VssComb GND 69 V5C...

Page 6: ...CONTROL BASE in the direction of arrow F as shown in Fig 2 the control base can be removed If necessary take off the wire connectors etc 3 1 5 REMOVING THE SPEAKER Remove the REAR COVER 1 Remove the 2 screws G and remove the SPEAKER HOLDER 2 Remove the 4 screws H as shown in Fig 1 3 Withdraw the SPEAKER backward 4 Follow the same steps when removing the other hand SPEAKER 3 1 6 CHECKING THE MAIN P...

Page 7: ...KER H SPEAKER HOLDER G AV TERMINAL BOARD C SPEAKER H FRONT PWB CONTROL BASE G SPEAKER HOLDER CHASSIS BASE MAIN PWB D FBT CLAW B CLAW B under side under side CHASSIS BASE CONTROL BASE FRONT SIDE E F Fig 2 Fig 2 4 2 2 2 2 16 CRT SOCKET PWB ...

Page 8: ...and pull out the CONTROL BASE in the direction of arrow F as shown in Fig 4 the control base can be removed If necessary take off the wire connectors etc 3 2 5 REMOVING THE SPEAKER Remove the REAR COVER 1 Remove the 2 screws G as shown in Fig 3 2 Withdraw the SPEAKER backward 3 Follow the same steps when removing the other hand SPEAKER 3 2 6 CHECKING THE MAIN PW BOARD To check the back side of the...

Page 9: ...WB 1 2 FRONT CONTROL PWB 2 2 MAIN PWB FBT CHASSIS BASE CONTROL BASE X4 X16 A PICTURE TUBE D C AV TERMINAL BOARD FRONT CABINET CHASSIS BASE CONTROL BASE FRONT SIDE E F X2 G SPEAKER X2 G SPEAKER Fig 2 Fig 4 CLAW B CLAW B under side under side REAR COVER ...

Page 10: ...hether 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 the...

Page 11: ... ECO SENSOR SURROUND PICTURE BOOSTER COMPONENT PIP S INPUT Setting item Setting content Setting value MULTI YES YES NO PAT E R C M I STEREO NO NO NO YES YES NO YES NO YES E R A P F PB YES AV 29JS25 AV 29WX25 G MULTI TRIPLE PAL THAI YES NO YES NO YES NO SINGLE NO PAT STEREO PB MONO E R A P F E R C M I E C YES NO YES NO YES NO YES NO YES NO YES NO YES NO YES NO YES NO ...

Page 12: ...LOW PR03 FAVORITE CH BLUE PR04 AI ECO SENSOR OFF AUTO SIGNAL DETECT ON DVD PICTURE MODE OFF TINT COLOR Centre WHITE BALANCE DVD COOL SOUND MODE DVD MUSIC CINEMA SURROUND DVD OFF Setting item Setting value 1 IF 1 VCO 2 DELAY POINT 2 V C 1 SCREEN 2 CUTOFF B G 3 WDR R G B 4 BRIGHT TV VDO 1 2 3 5 CONT TV VDO 1 2 3 TV 16 9 VDO 16 9 6 COLOUR TV VDO1 2 3 DVD 7 TINT TV VDO 1 2 3 8 SHARP Do not adjust 9 Y ...

Page 13: ...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 as i...

Page 14: ... 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 POINT AGC TAKE OVER adjustment VIDEO CIRCUIT ADJUSTMENTS WHI...

Page 15: ...ORD SPEAKER L DEG COIL HVT MAIN PWB ASS Y FRONT CONTROL PWB ASS Y 1 2 FRONT CONTROL PWB ASS Y 2 2 J804 J803 J802 S804 S805 S806 S802 S803 S801 J801 CN00S CN002 R CN001 CNDEG PW W S901 1 8 1 6 LOWER SCREEN 6 1 1 6 U TU001 J804 J801 J805 J802 J803 IC701 CN001 CN00W CN002 T TP E SPEAKER R ROTATION COIL DEF YOKE CN00X 1 B1 2 NC 3 X RAY2 4 X RAY1 5 GND CN00C 1 5V 2 SCL0 3 SDA0 4 SCL1 5 SDA1 6 GND GND 5...

Page 16: ...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 a...

Page 17: ...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 4 3 16 9 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 PLUG PLAY ON 2 V C 4 DEF 6 STATUS...

Page 18: ... 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 PAL 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 Press the DISPL...

Page 19: ... 42 32 37 1 VIDEO 32 31 2 1 4 1 3 5 7 TINT RF 0 63 32 31 27 3 VIDEO 32 31 2 4 8 SHARP RF 0 63 23 23 23 23 VIDEO 0 63 35 35 35 35 15 15 9 Y DELAY RF 0 15 12 9 12 4 VIDEO 0 15 11 7 9 8 S VIDEO 0 15 7 7 7 7 10 TINT DVD RF 0 63 32 31 34 7 0 0 VIDEO 32 31 1 7 0 0 3 2 11 AMP T SHARP RF VIDEO 0 63 0 0 0 0 0 0 12 TWIN CONT TWIN RF 15 15 15 15 TWIN VIDEO Adjustment item Variable range Initial setting value...

Page 20: ...elect VIDEO 2 SET from the MENU and set VIDEO 2 SET to COMPONENT 3 Adjust COMPONENT WHITE BALANCE in the same way as COMPOSITE WHITE BALANCE WHITE BALANCE High light adjustment Signal generator Remote control unit 2 V C 3 WDR R 3 WDR G 3 WDR B Notes Proceed to the following adjustment after having completed the WHITE BALANCE Low light adjustment Set PICTURE MODE VSM to BRIGHT 1 Receive a PAL black...

Page 21: ...ntrast 6 Press the DISPLAY key twice to return to the normal screen SUB COLOUR 1 adjustment Remote control unit 2 V C 6 COLOUR Method of adjustment without 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 broadcast 2 Select 2 V C from the SERVICE MENU 3 Select 6 COLOUR 4 Set t...

Page 22: ...CAM COLOUR 1 Receive a SECAM colour bar signal colour bar 75 white 2 Press the COLOUR SYSTEM key to select the SECAM colour system 3 Set the initial setting value of SECAM COLOUR 4 Adjust SECAM COLOUR to set the value A in the figure to 5V AV 29JS25 or 10V AV 29WX25 G NTSC 3 58 COLOUR 1 Receive a NTSC 3 58 colour bar signal full field colour bar 75 white 2 Press the COLOUR SYSTEM key to select the...

Page 23: ...ng value make fine adjustment until you get the best tint 7 Press the DISPLAY key twice to return to the normal screen NTSC 4 43 TINT When adjustment is done for NTSC 3 58 TINT appropriate values are automatically set for NTSC 4 43 TINT SUB TINT 2 adjustment Signal generator Oscilloscope Remote control unit TP 47B TP E CRT SOCKET PWB 2 V C 7 TINT Method of adjustment using measuring instrument Not...

Page 24: ...6 4 9 NEWS 5 4 0 2 5 USER 0 0 0 0 0 VIDEO SOUND TURBO 9 6 4 8 11 THEATER 4 2 10 5 7 MUSIC 5 1 6 4 10 NEWS 5 4 0 2 5 USER 0 0 0 0 0 DVD SOUND TURBO 9 6 4 8 11 THEATER 4 2 10 5 7 MUSIC 5 1 6 4 10 NEWS 5 4 0 2 5 USER 0 0 0 0 0 Function MODE Item 100Hz 300Hz 1kHz 3kHz 8kHz MENU EQUALIZER RF SOUND TURBO 12 5 3 8 9 THEATER 5 3 9 6 8 MUSIC 4 2 1 3 7 NEWS 5 4 0 2 5 USER 0 0 0 0 0 VIDEO SOUND TURBO 12 6 5 ...

Page 25: ...URE 4 DEF NOTE The value with an asterisk is variable for adjustment The values in parenthesis are fixed values V ZOOM DATA can adjust follow data range in case measurement line power on is appeared Adjustment item Variable range Initial setting value 4 3 COMPRESS 16 9 4 3 50Hz Others 50Hz 60Hz 50Hz 60Hz 1 V SHIFT 0 63 32 31 0 0 0 0 2 V SLOPE 0 63 32 31 0 0 0 0 3 V SIZE 0 63 32 31 15 0 4 2 4 H CEN...

Page 26: ...f 1 V SHIFT 4 Adjust 1 V SHIFT to make A B NTSC V POSITION 1 Receive a NTSC circle pattern signal of vertical frequency 60Hz 2 Make similar adjustment of NTSC V POSITION in the same way as for PAL V POSITION V HEIGHT adjustment Signal generator Remote control unit 4 DEF 3 V SIZE PAL V HEIGHT 1 Receive a PAL crosshatch signal 2 Select 3 V SIZE 3 Set the initial setting value of 3 V SIZE 4 Adjust 3 ...

Page 27: ... EW PIN 4 Adjust 7 EW PIN so that the first vertical lines at the left and right edges on the screen are straight NTSC SIDE PIN 1 Receive a NTSC crosshatch signal 2 Make similar adjustment of NTSC SIDE PIN in the same way as for PAL SIDE PIN TRAPEZIUM adjustment Signal generator Remote control unit 4 DEF 6 TRAPEZ PAL TRAPEZIUM 1 Receive a PAL crosshatch signal 2 Select 6 TRAPEZ 3 Set the initial s...

Page 28: ... 8 COR UP 3 Set the initial setting value of 8 COR UP 4 Select 9 COR LO 5 Set the initial setting value of 9 COR LO 6 Adjust 8 COR UP and 9 COR LO so that the vertical lines at the four corners on the screen are straight NTSC CORNER PIN 1 Receive a NTSC crosshatch signal 2 Make similar adjustment of NTSC CORNER in the same way as for PAL CORNER H PARALLEL adjustment Signal generator Remote control...

Page 29: ...ICTURE FEATURES 4 Select COMPRESS 16 9 and set COMPRESS to ON 5 Select 4 DEF from the SERVICE MENU 6 Set the initial setting value of 14 V ZOOM 7 Select 3 V SIZE 8 Set the initial setting value of 3 V SIZE 9 Adjust 3 V SIZE to set the vertical amplitude of the image to 305mm NTSC V HEIGHT 1 Receive a NTSC crosshatch signal of vertical frequency 60Hz 2 Make similar adjustment of NTSC V HEIGHT in th...

Page 30: ... vertical lines at the left and right edges on the screen are in parallel NTSC TRAPEZIUM PIN 1 Receive a NTSC crosshatch signal 2 Make similar adjustment of NTSC TRAPEZIUM in the same way as for PAL TRAPEZIUM CORNER PIN adjustment Signal generator Remote control unit 4 DEF 8 COR UP 9 COR LO PAL CORNER PIN 1 Receive a PAL crosshatch signal 2 Select 8 COR UP 3 Set the initial setting value of 8 COR ...

Page 31: ... control unit 5 VSM W B 1 BRIGHT 2 CONT 3 COLOUR 4 SHARP 5 HUE 1 R DRIVE 2 G 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 t...

Page 32: ...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 33: ...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 34: ...ethod 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 the...

Page 35: ... No YA281 1 35 ...

Page 36: ... No YA281 AV MULTIMEDIA COMPANY DISPLAY CATEGORY 12 3 chome Moriya cho Kanagawa ku Yokohama city Kanagawa prefecture 221 8528 Japan Victor Company of Japan Limited VPT Printed in Japan ...

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