JVC AV24WT5EIS Service Manual Download

Page: 37 / 39

No. 51776

AV-28WT5EKS AV-24WT5EKS
AV-28WT5EPS AV-24WT5EPS

AV-28WT5EIS AV-24WT5EIS

AUDIO CIRCUIT ADJUSTMENT

Do not touch 3.AUDIO(1. CONC LIMIT, 2. A2 ID THR, 3. ALC, 4. BASS, 5. TREBLE) of the SERVICE MENU as it requires no adjustment.

3. AUDIO

Setting item

Variable range

fixed value

1. CONC LIMIT

(Do not adjust)

00H

～

FFH

0AH

2. A2 ID THR

(Do not adjust)

00H

～

FFH

19H

3. ALC

(Do not adjust)

4. BASS

(Do not adjust)

-17

～

+17

5. TREBLE

(Do not adjust)

-17

～

+17

20MSEC

2SEC

4SEC

8SEC

Summary of Contents for AV24WT5EIS

Page 1: ...EPS AV24WT5EPS AV28WT5EIS AV24WT5EIS AV28WT5EKS AV24WT5EKS CONTENTS SPECIFICATIONS 2 SAFETY PRECAUTIONS 4 WARNING 5 FEATURES 7 MAIN DIFFERENCE PARTS LIST 9 SPECIFIC SERVICE INSTRUCTIONS 10 SERVICE ADJUSTMENTS 17 PARTS LIST 39 OPERATING INSTRUCTIONS 1 1 STANDARD CIRCUIT DIAGRAM 2 1 SERVICE MANUAL COLOUR TELEVISION BASIC CHASSIS JKⅡ Ⅱ Ⅱ Ⅱ ...

Page 2: ... I 32 9MHz 6 0MHz I Colour Sub Carrier Freq PAL 4 43MHz 4 43MHz 4 43MHz SECAM 4 40625MHz 4 25MHz NTSC 3 58MHz 4 43MHz 3 58MHz 4 43MHz 3 58MHz 4 43MHz Power Input AC 220V 240V 50Hz Power Consumption 156W Max 122W Avg 122W h ITALY Aerial Input Term 75Ωunbalanced Coaxial Picture Tube Visible size 66cm Measured diagonally High Voltage 30 0kV at zero beam current Speaker 10cm 3cm Oval type 2 Audio Outp...

Page 3: ...MHz I Colour Sub Carrier Freq PAL 4 43MHz 4 43MHz SECAM 4 40625MHz 4 25MHz NTSC 3 58MHz 4 43MHz 3 58MHz 4 43MHz Power Input AC 220V 240V 50Hz 127W Max 92W Avg Power Consumption 92W h ITALY Aerial Input Term 75Ωunbalanced Coaxial Picture Tube Visible size 56cm Measured diagonally High Voltage 30 0kV at zero beam current Speaker 10cm 3cm Oval type 2 Audio Output 5W 5W EXT 1 EXT 2 EXT 3 Input Output ...

Page 4: ...ternatives 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 10k 2W resistor to the anode button 8 When service is required observe...

Page 5: ...ristics are identified in the Parts List of Service Manual Electrical components having such features are identified by shading on the schematics and by on the Parts List in the Service Manual The use of a substitute replacement which does not have the same safety characteristics as the recommended replacement part shown in the Parts List of Service Manual may cause shock fire or other hazards 4 T...

Page 6: ...L output 500mVrms Nominal Low impedance TV OUT LINE OUT NC 4 AUDIO GND 5 GND B 6 AUDIO L input 500mVrms Nominal High impedance 7 B input 700mVB W 75Ω NC NC 8 FUNCTON SW SLOW SW Low 0 3V High 8 12V High impedance 9 GND G 10 SCL3 NC NC 11 G input 700mVB W 75Ω NC NC 12 SDA3 NC NC 13 GND R 14 GND YS NC NC 15 R C input R 700mVB W 75Ω C 300mVP P 75Ω only R only C only C 16 Ys input Low 0 0 4 High 1 3V 7...

Page 7: ...and WST system Because this TV unit corresponds to multiplex broadcast users can enjoy music programs and sporting events with live realism In addition BILINGUAL programs can be heard in their original language Built in ECO ECONOMY ECOLOGY MODE 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 i...

Page 8: ...0899 001A U REMOTE CONTROL UNIT RM C54 1C RM C55 1C X RAY CARD AEM1061 001 E S DIAGRAM ONLY ITALY SERVICE 2824WT5 HSAEI REG SHEET AEM3148 001 E Model Name Part Name AV24WT5EPS AV24WT5EIS AV24WT5EKS MAIN PWB SJK 1713A U2 SJK 1913A U2 AV SEL PWB SJK0S713A U2 SJK0S913A U2 POWER CORD QMPK160 185 JC QMPN130 185 JC RATING LABEL LC20433 007A U LC20434 007A U LC20080 014A U LC20091 022A U EURO LABEL AEM10...

Page 9: ... the solder at each end 2 Shift with 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...

Page 10: ...f the AV TERMINAL BOARD slightly in the direction of arrow F F F F as shown in Fig 2 REMOVING THE SPEAKER After removing the rear cover 1 Remove the 2 screws marked G G G G as shown in Fig 1 2 Follow the same steps when removing the other hand speaker CHECKING THE PW BOARD To check the back side of the PW Board 1 Pull out the chassis Refer to REMOVING THE CHASSIS 2 Erect the chassis vertically so ...

Page 11: ...76 AV28WT5EPS AV28WT5EIS AV28WT5EKS 11 FRONT CABINET CRT SOCKET PWB FRONT CONTROL PWB POWER DEF PWB CLAW CLAW MAIN PWB CONTROL BASE CHASSIS REAR COVER Fig 1 AV TERMINAL BOARD SPEAKER AV SEL PWB B C B 28 Model ...

Page 12: ... of arrow E E E E as shown in Fig 4 REMOVING THE SPEAKER After removing the rear cover 1 Remove the 2 screws marked F F F F as shown in Fig 3 2 Follow the same steps when removing the other hand speaker CHECKING THE PW BOARD To check the back side of the PW Board 1 Pull out the chassis Refer to REMOVING THE CHASSIS 2 Erect the chassis vertically so that you can easily check the back side of the PW...

Page 13: ...No 51776 AV24WT5EPS AV24WT5EIS AV24WT5EKS 13 FRONT CABINET CRT SOCKET PWB FRONT CONTROL PWB POWER DEF PWB CLAW CLAW MAIN PWB CHASSIS REAR COVER Fig 3 AV TERMINAL BOARD SPEAKER AV SEL PWB C B 24 Model ...

Page 14: ...uence of its dismounting steps The CRT change table should preferably be smaller that the CRT surface and its height be about 35cm COATING OF SILICON GREASE FOR ELECTRICAL INSULATION ON THE CRT ANODE CAP SECTION Subsequent to replacement of the CRT and HV transformer or repair of the anode cap etc by dismounting them be sure to coat silicon grease for electrical insulation as shown in Fig 8 Wipe a...

Page 15: ...neously and the SYSTEM CONSTANT SET screen of Fig 2 will be displayed 4 Check the setting values of the SYSTEM CONSTANT SET of Table 1 If the value is different select the setting item with the FUNCTION UP DOWN key and set the correct value with the FUNCTION key 5 Press the MENU key to memorize the setting value 6 Press the INFORMATION key twice and return to the normal screen 5 Setting of receive...

Page 16: ...ID No ALL CH OFF OFF SOUND SETTING INSTALL LANGUAGE EDIT MANUAL ENGLISH PRESET CH only The others BLANK STEREO Ⅰ Ⅱ BASS TREBLE BALANCE HYPER SOUND 3 OFF DEMO OFF SERVICE MENU SETING ITEMS TABLE 3 Setting item Setting value Setting item Setting value 1 IF VCO 4 DEF 1 V SHIFT 2 V SIZE 3 SUBTITLE 4 H CENT 5 H SIZE 6 EW PIN 7 TRAPEZ 8 EW COR L 9 EW COR H 10 V S COR 11 V LIN 12 H BLK R 13 H BLK L 14 V ...

Page 17: ...ting adjustment 5 If the receive or input signal is not specified use the most appropriate signal for adjustment 6 Never touch parts such as variable resistors transformers and condensers not shown in the adjustment items of this service adjustment 7 Preparation for adjustment presetting Unless otherwise specified in the adjustment items preset the following functions with the REMOTE CONTROL UNIT ...

Page 18: ...CKET PWB SOLDER SIDE TOP FRONT MAIN PWB POWER DEF PWB FRONT CN006 AV SEL PWB TUNER CN001 IC701 IC702 MEMORY W DEG 1pin B1 TP 91 2pin NC 3pin NC 4pin NC 5pin GND 5 1 X FRONT CONTROL PWB 1 AV28WT5EPS EIS EKS FRONT HV SCREEN FOCUS TP 47G TP 47B CN009 L IC301 CN008 CN001 SP R PW F901 POWER SW SP L 28 Model ...

Page 19: ... E CRT SOCKET PWB SOLDER SIDE TOP FRONT MAIN PWB POWER DEF PWB FRONT CN006 AV SEL PWB TUNER CN001 IC701 IC702 MEMORY W DEG 1pin B1 TP 91 2pin NC 3pin NC 4pin NC 5pin GND 5 1 X FRONT CONTROL PWB 1 AV24WT5EPS EIS EKS FRONT HV SCREEN FOCUS TP 47G TP 47B CN009 L IC301 CN008 CN001 SP R PW F901 SP L POWER SW ...

Page 20: ... 5 5 VSM PRESET This mode adjusts the initial setting values of COOL NOMAL and WARM VSM Video Status Memory 6 6 VPS This mode shows the monitor of the VPS and PDC Do not adjust VPS Video Program System PDC Program Delivery Code 7 7 AUTO PROGRAM By turning the power switch on you can get the state of AUTO PROGRAM Do not adjust 3 BASIC OPERATION OF SERVICE MENU 1 How to enter SERVICE MENU Press the ...

Page 21: ...COR H 10 V S COR 11 V LIN 12 H BLK R 13 H BLK L 14 V EHT Do not adjust 15 H EHT Do not adjust 16 EHT GAIN Do not adjust Fig 3 SUB MENU SCREEN SERVICE MENU SERVICE MENU 1 IF 2 V C 3 AUDIO 4 DEF 5 VSM PRESET 6 VPS 7 AUTO PROGRAM OFF 1 7 SELECT EXIT SUB MENU 5 VSM PRESET VSM PRESET NORMAL 1 BRIGHT STORE EXIT OK VCO CW MHz TOO HIGH ABOVE REFERENCE JUST REFERENCE BELOW REFERENCE TOO LOW EXIT SUB MENU 6...

Page 22: ...HITE BALANE For the setting refer to each item concerned MENU Key Memorize the setting value Before storing the setting values in memory do not press the CH TV POWER ON OFF key if you do the values will not be stored in memory INFOMATION Key Return to the SERVICE MENU screen 3 Method of setting 6 VPS and 7 AUTO PROGRAM 6 VPS This mode displayed monitor of VPS systems Do not adjust 7 AUTO PROGRAM W...

Page 23: ...igh Voltage Signal Generator DC volunteer Remote Control unit CRT anode Chassis GND 1 Receive a any broadcast 2 Push the ZOOM key and select the FULL mode 3 Select 2 V C from the SERVICE MENU 4 Select 1 CUT OFF with Function UP DOWN key 5 Show one horizontal line with the 1 key 6 Turn the SCREEN VR the whole black screen display 7 Connect a DC voltmeter to CRT ANODE and chassis GND 8 Make sure tha...

Page 24: ...ERVICE MENU 2 Select COOL with the MENU key of the remote control unit 1 Adjust the FUNCTION UP DOWN and key to bring the set values of 1 BRIGHT 7 B DRIVE to the values shown in the table 4 Press the MENU key and memorize the set value 5 Respectively select the VSM PRESET mode for NORMAL and WARM and make similar adjustment as in 3 above 6 Press the MENU key and memorize the set value Refer to OPE...

Page 25: ...rument Test point Adjustment part Description Adjustment of WHITE BALANCE Low Light Signal generator Remote control unit 1 CUT OFF R G B SCREEN VR In FBT Set the PICTURE MODE to NORMAL 1 Receive a black and white signal colour off 2 Select 2 V C from the SERVICE MENU 3 Select 1 CUT OFF with the FUNCTION UP DOWN key 4 Push the ZOOM key and select the PANORAMIC mode 5 Show one horizontal line with t...

Page 26: ...UB BRIGHT Remote control unit 3 BRIGHT 1 Receive any broadcast 2 Select 2 V C from the SERVICE MENU 3 Select 3 BRIGHT with the FUNCTION UP DOWN key 4 Set the initial setting value with the FUNCTION key 5 If the brightness is not the best with the initial setting value make fine adjustment until you get the best brightness 6 Press the MENU key and memorize the set value Adjustment of SUB CONT Remot...

Page 27: ...r is not the best with the initial set value make fine adjustment until you get the best colour 6 Press the MENU key and memorize the set value SECAM COLOUR Only AV28WT5EPS AV24WT5EPS SECAM COLOUR 1 Receive a SECAM broadcast 2 Make fine adjustment of SECAM COLOUR in the same manner as for above NTSC 3 58 COLOUR 1 Input a NTSC 3 58MHz COMPOSITE VIDEO signal from the EXT terminal 2 Make similar fine...

Page 28: ...AM full field colour bar signal 75 white 2 Set the initial setting value of SECAM COLOUR with the FUNCTION key 3 Adjust SECAM COLOUR and bring the value of A in the illustration to the values as shown given billow Voltage difference between white W and blue B 4 Press the MENU key and memorize the setting value NTSC 3 58 COLOUR 1 Input a NTSC 3 58MHz COMPOSITE VIDEO signal full field colour bar wit...

Page 29: ... HUE NTSC 4 43 HUE 1 When NTSC 3 58 is set NTSC 4 43 will be automatically set at the respective values 6 HUE Method of adjustment using measuring instrument NTSC 3 58 HUE NTSC 3 58 HUE 1 Input a NTSC 3 58MHz COMPOSITE VIDEO signal full field colour bar with 75 white from the EXT terminal 2 Select 2 V C from the SERVICE MENU 3 Select 6 HUE with the FUNCTION UP DOWN key 4 Set the initial setting va...

Page 30: ...ignal generator Oscilloscope Remote control unit 35 PIN R Y 36 PIN B Y IC 301 ON MAIN PWB 7 BLACK OFFSET R Y B Y 1 Receive a SECAM COLOUR bar signal full field colour bar 75 white 2 Select 2 V C from SERVICE MENU 3 Select 7 BLACK OFFSET with the FUNCTION UP DOWN key 4 Connect the oscilloscope between 35 pin of IC 301 and TP E 5 By using 4 and 7 keys of the remote control adjust the BLACK OFFSET R ...

Page 31: ...0 0 0 9 EW COR H CORNER PIN correction High side 0 0 0 0 0 0 0 0 10 V S COR Vertical height correction 4 0 0 0 0 0 4 0 11 V LIN Vertical Linearity 1 0 0 0 1 0 0 0 12 H BLK R BLANKING POSITION of Right side 0 0 118 119 0 0 0 0 13 H BLK L BLANKING POSITION of Left side 0 0 28 24 0 0 0 0 14 V EHT Do not adjust V size correction level caused by EHT change 4 0 0 0 0 0 0 0 15 H EHT Do not adjust H size ...

Page 32: ...rection level caused by EHT change 4 0 0 0 0 0 0 0 15 H EHT Do not adjust Hsize correction level caused by EHT change 3 0 0 0 0 0 0 0 16 EHT GAIN Do not adjust Size correction gain caused by EHT change 0 0 0 0 0 0 0 0 Initial setting value 2 2 Initial setting value FULL REGULAR Setting item Adjustment name 50Hz 60Hz 50Hz 60Hz 1 V SHIFT Vertical center 0 0 0 0 2 V SIZE Vertical height 6 5 5 3 3 SUB...

Page 33: ...ain horizontal lines with less noise on the screen adjust V LIN instead of PANORAMIC mode Adjustment of V SIZE SUBTITLE 2 V SIZE 3 SUBTITLE 6 Receive a cross hatch signal 7 Select 2 V SIZE and set the initial setting value 8 Adjust V SIZE and make sure that the vertical screen size of the picture size is in the bellow table 9 Press the MENU key and memorize the set value 10 When adjust the SUBTITL...

Page 34: ...The numeric of the REGULAR and 14 9 ZOOM modes are shown the length of the 90 horizontal size position L as shown in the figure above 14 Input a NTSC VIDEO signal 60Hz from the EXT terminal and make sure that the horizontal screen size of the each ASPECT mode is in the below table 15 Press the MENU key and memorize the set value Adjustment of EW PIN 6 EW PIN 16 Select 6 EW PIN and set the initial ...

Page 35: ...WN key 28 Set the initial setting value of EW COR H with the FUNCTION or key 29 Adjust EW COR H and bring the straight line at the upper corner 30 Press the MENU key and memorize the set value Adjustment of V S CR V LINEARITY 10 V S CR 11 V LIN When the vertical linearity has been deteriorated remarkably perform the following steps 31 Receive a cross hatch signal 32 Select 11 V LIN with the FUNCTI...

Page 36: ...trument Test point Adjustment part Description Adjustment of H BLANKING H BLK Capacitor On MAIN PWB 1 Receive the PAL circle pattern signal 2 Select 4 DEF from the SERVICE MENU 3 Select the aspect 14 9 ZOOM mode 4 Select 12 H BLK R with the FUNCTION UP DOWN key and adjust H BLANKING so that 92 of the picture on the right side is displayed 5 Select 13 H BLK L with the FUNCTION UP DOWN key and adjus...

Page 37: ...UDIO 1 CONC LIMIT 2 A2 ID THR 3 ALC 4 BASS 5 TREBLE of the SERVICE MENU as it requires no adjustment 3 AUDIO Setting item Variable range fixed value 1 CONC LIMIT Do not adjust 00H FFH 0AH 2 A2 ID THR Do not adjust 00H FFH 19H 3 ALC Do not adjust 4 BASS Do not adjust 17 17 0 5 TREBLE Do not adjust 17 17 0 20MSEC 2SEC 4SEC 8SEC ...

Page 38: ...No 51776 AV 28WT5EKS AV 24WT5EKS AV 28WT5EPS AV 24WT5EPS AV 28WT5EIS AV 24WT5EIS 38 ...

Page 39: ...WT5EPS U 4 AV28WT5EIS U 4 AV24WT5EIS U 4 AV28WT5EKS U 3 AV24WT5EKS U 3 4 Printed in Japan VP 0101 DP2051 VICTOR COMPANY OF JAPAN LIMITED HOME AV NETWORK BUSINESS UNIT 1106 Heta Iwai city Ibaraki prefecture 306 0698 Japan ...

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