JVC AV28CT1EIS, Service Manual

Page 1: ... Mar 2002 AV28CT1EKS AV28CT1EKB AV28CT1EPS AV28CT1EPB AV28CT1EIS CONTENTS SPECIFICATIONS 2 SAFETY PRECAUTIONS 4 WARNING 5 FEATURES 6 MAIN DIFFERENCE LIST 6 SPECIFIC SERVICE INSTRUCTIONS 7 SERVICE ADJUSTMENTS 13 PARTS LIST 33 STANDARD CIRCUIT DIAGRAM 2 1 SERVICE MANUAL COLOUR TELEVISION BASIC CHASSIS JKⅡ Ⅱ Ⅱ Ⅱ ...

Page 2: ...nd 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 channels...

Page 3: ...FF SOUND SETTING INSTALL LANGUAGE EDIT MANUAL ENGLISH PRESET CH only The others BLANK STEREO Ⅰ Ⅱ BASS TREBLE BALANCE HYPER SOUND 8 OFF DEMO OFF SERVICE MENU SETTING 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 EHT 15 H EHT 16 E...

Page 4: ...ng 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 Se...

Page 5: ... CN009 CN008 TP E CRT SOCKET PWB SOLDER SIDE TOP FRONT MAIN PWB POWER DEF PWB FRONT CN006 AV SEL PWB TU NER CN001 IC701 IC702 MEMORY W DEG 1pin B1 TP 91 2pin NC 3pin NC 4pin NC 5pin GND 5 1 X FRONT CONTROL PWB FRONT HV SCR EEN FOCUS TP 47G TP 47B CN009 IC301 CN008 CN001 SP R PW F901 POWERSW SP L F ...

Page 6: ...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 INFOR...

Page 7: ...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 O FF 1 7 SELECT EXIT 5 VSM PRE SET VSM PRESET NORMAL 1 BRIGHT STORE EXIT OK VCO CW MHz TOOHIGH ABOVE REFERENCE JUST REF ERENCE BELOW REF ERENCE TOOLOW EXIT 6 VPS VPS VPS 0000H P...

Page 8: ...LANCE 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 INFORMATION 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 When t...

Page 9: ...ltage 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 that the ...

Page 10: ...NU 2 Select COOL with the MENU key of the remote control unit 3 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 OPERATING IN...

Page 11: ...escription 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 the 1 key 6 Gradually turn the SCREE...

Page 12: ...HT 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 CONTRAST Remote c...

Page 13: ...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 AV28CT1EPS AV28CT1EPB 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 adju...

Page 14: ...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 5V 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 with 75 white from the EXT terminal 2 Set the initial setting value of NTSC 3 5...

Page 15: ...TSC 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 DOW N key 4 Set the initial setting value o...

Page 16: ...SET SECAM Ⅱ Ⅱ Ⅱ Ⅱ Signal 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 ...

Page 17: ... side 0 0 0 0 0 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 0 123 124 0 0 0 0 13 H BLK L BLANKING POSITION of Left side 0 0 36 27 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 no...

Page 18: ...zontal 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 SUBTITLE select...

Page 19: ...d memorize the set value 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 21 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 22 Press the MENU key and memorize the set value Adjustment of EW PIN 6 EW PIN 23 Select 6 EW...

Page 20: ...initial setting value of EW COR H with the FUNCTION or key 36 Adjust EW COR H and bring the straight line at the upper corner 37 Press the MENU key and memorize the set value Adjustment Of VERTICAL S CORRECTION VERTICAL LINEARITY 10 V S CR 11 V LIN When the v ertical linearity has been deteriorated remarkably perform the following steps 38 Receive a cross hatch signal 39 Select 11 V LIN with the F...

Page 21: ...point Adjustment part Description Adjustment of HORIZONTAL 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 adjust H ...

Page 22: ...NC 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 23: ... 16 QETM1CM 228 C513 AV_LINK 5 6k R314 2 Q302 X 22k R417 32V SCL2 R418 R419 22k R509 0 01 C510 100K TXT_YS SECAM Trap SW Q308 SDA2 18k R420 100 16 C305 Q308 5 X X TU001 QAU0188 2 QAU0189 2 R690 X CN012 X X 100K R002 27 0 R010 X 0 01 C310 X Y617 0 Y618 0 R003 27 X C011 X QQL244J 151Z L501 0 R008 0 Y003 3 D624 3 D608 X C012 R011 R415 220 16 C623 C408 3 D612 0 015 0 015 5 6k 5 6k Y305 0 0 27 QQL244K ...

Page 24: ...0 1 NCB21EK 104X C877 0 01 C886 330 R882 2 7k R874 0 01 C883 0 1 NCB21EK 104X C871 CH C879 13 875MHz CE41257 001Z X871 220 R751 ET417 DATA SLICER IC871 220 R752 220 R765 220 R766 3 D702 100k R875 47k R704 1 Q701 1k R705 1 NCF21CZ 105X C701 TXT_B SDA1 SCL1 REMOCON KEY1 AA_SCL 12V VP AA_SDA AA_FRQ AA_50 60 KEY2 TXT_R TXT_G ECO SP_L SP_R OSD_VP S_COR SDA3 AFC_MAIN SCL2 AA_50 60 SCL3 SDA3 OSD_HP SCL3 ...

Page 25: ...0 16 QEHR1CM 107Z C970 X HS962 2 2 2W OMF QRT029J 2R2 R912 47 25 C973 0 0033 AC250V QCZ9079 332 C991 SE140N ERROR AMP IC951 5 6 QQL26AM 5R6Z L953 QQR0621 002Z K953 001 2KV QCZ0122 102 C910 BA17809T 9V REG IC953 BA05T 5V REG IC954 0 1 CC C968 X C978 0 01 MY C531 0 68 TF C964 2200 35 QETM1VM 228 C959 BYW95B 20 D953 BYD33M T3 D902 4 7 1 4W FR 4 7 1 2W FR QRZ9017 4R7 R524 2200 25 QTMM1EM 228 C954 ICP ...

Page 26: ...3Y LC602 68p C154 68p CH C155 X Y105 BW Y106 QQR0621 002Z K601 X X SJK 0S912A H3 BA4558F X 1 2 IC602 0 Y621 0 022 C628 33k R620 10k R622 3 3k R618 4 D101 470 16 C102 10 50 C103 4 D103 4 D102 10 50 C105 0 0047 C108 0 0015 C107 10 50 C104 75 R102 75 R113 75 R104 QNZ0463 001 J002 4 D104 75 R101 75 R103 0 0047 C106 0 0015 C109 QNZ0465 001 J001 470 16 C110 150P CH C113 75 R106 0 0047 C111 0 0047 C112 1...

Page 27: ...01 390p CH C101 QNZ0464 001 SK001 3 9k R107 CN0SC MA3082 L X D152 1k QRZ0107 102Z R127 2SC4682 T Q152 47 R113 10 50 C107 BW L102 18k OMF2 R120 1k QRZ0107 102Z R126 BW L101 X R128 1k QRZ0107 102Z R125 18k OMF2 R119 47 R114 2SC4544 LB Q104 TP 47G 10 H105 10 H106 H 15k OMF2 R116 H SK001 470k QRZ0107 474Z R135 X R303 15k OMF2 R117 15k OMF2 R118 0 R154 X K303 220 R111 100 R101 47 25 C105 X Q304 QJK002 ...

Page 28: ...F D801 6 8k R851 560 R801 QMS3004 C01 J801 100 16 C852 QSW0619 003Z S803 QSW0619 003Z S802 27 QQL244K 270Z L303 QQR0716 001Z L302 QGA2501C1 09 CN00F 0 47 MF AC275V QFZ9040 474 C901 1k R813 5 Q801 X R803 0 1 NCB21EK 104X C851 560 R802 0 01 C805 QSW0619 003Z S801 QRE121J 271Y R811 QRE121J 271Y R810 NCB21HK 102X C303 V4 A GND V GND R4 A GND C4 V GND L4 Y4 C4 Y4 V4 L4 R4 SP NC NC SP VR R4 V DOWN GND G...

Page 29: ...High Voltage Resistor MF CAP Metalized Film Capacitor MF R Metal Film Resistor MM CAP Metalized Mylar Capacitor MG R Metal Glazed Resistor MP CAP Metalized Polystyrol Capacitor MP R Metal Plate Resistor PP CAP Polypropylene Capacitor OM R Metal Oxide Film Resistor PS CAP Polystyrol Capacitor CMF R Coating Metal Film Resistor TF CAP Thin Film Capacitor UNF R Non Flammable Resistor MPP CAP Metalized...

Page 30: ...R 6 8kΩ 1 10W J R1519 NRSA02J 562X MG R 5 6kΩ 1 10W J R1520 NRSA02J 152X MG R 1 5kΩ 1 10W J R1571 NRSA02J 101X MG R 100Ω 1 10W J Symbol No Part No Part Name Description RESISTOR R1572 NRSA02J 133X MG R 13kΩ 1 10W J R1573 NRSA02J 821X MG R 820Ω 1 10W J R1608 09 NRSA02J 822X MG R 8 2kΩ 1 10W J R1610 11 NRSA02J 103X MG R 10kΩ 1 10W J R1633 NRSA02J 273X MG R 27kΩ 1 10W J R1635 NRSA02J 561X MG R 560Ω 1...

Page 31: ... C1606 QETN1EM 227Z E CAP 220µF 25V M C1622 23 QETN1CM 227Z E CAP 220µF 16V M C1624 QETN1EM 476Z E CAP 47µF 25V M C1626 QENC1EM 107Z BP E CAP 100µF 25V M C1627 QETM1EM 228 E CAP 2200µF 25V M Symbol No Part No Part Name Description CAPACITOR C1629 QENC1EM 107Z BP E CAP 100µF 25V M C1631 QETN1EM 476Z E CAP 47µF 25V M C1632 NCS21HJ 221X C CAP 220pF 50V J C1633 34 QFV71HJ 104Z MF CAP 0 1µF 50V J C1635...

Page 32: ... C R 1 0Ω 1 2W J R2461 QRE141J 331Y C R 330Ω 1 4W J R2463 QRE121J 392Y C R 3 9kΩ 1 2W J R2464 QRE121J 682Y C R 6 8kΩ 1 2W J R2465 QRE121J 103Y C R 10kΩ 1 2W J R2466 QRE121J 102Y C R 1kΩ 1 2W J R2467 QRL039J 120 OM R 12Ω 3W J R2492 QRE141J 683Y C R 68kΩ 1 4W J R2493 QRE141J 224Y C R 220kΩ 1 4W J R2494 QRZ9017 4R7 F R 4 7 Ω 1 4W J R2495 QRE141J 103Y C R 10kΩ 1 4W J R2496 QRE141J 183Y C R 18kΩ 1 4W J...

Page 33: ...03 C CAP 0 01µF 500V K C2909 QCZ0122 391 C CAP 390pF 2kV K C2910 QCZ0122 102 C CAP 1000pF 2kV K C2912 QCB31HK 471Z C CAP 470pF 50V K C2913 QETN1HM 476Z E CAP 47µF 50V M C2916 QETN1HM 107Z E CAP 100µF 50V M C2918 QCB31HK 681Z C CAP 680pF 50V K C2933 34 QETN1HM 106Z E CAP 10µF 50V M C2935 QETN1EM 227Z E CAP 220µF 25V M Symbol No Part No Part Name Description CAPACITOR C2951 QCZ0122 561 C CAP 560pF 2...

Page 34: ...ER PC2541 PC123F2 PHOTO COUPLER PC2542 PC123F2 PHOTO COUPLER PC2901 PC123FY2 PHOTO COUPLER RY2931 QSK0099 001 RERAY TH2901 QAD0120 9R0 P THERMISTOR CRT SOCKET P W BOARD ASS Y SJK 3512A H3 Symbol No Part No Part Name Description RESISTOR R3101 03 NRSA02J 101X MG R 100Ω 1 10W J R3107 NRSA02J 392X MG R 3 9kΩ 1 10W J R3108 NRSA02J 392X MG R 3 9kΩ 1 10W J R3109 NRSA02J 392X MG R 3 9kΩ 1 10W J R3110 12 ...

Page 35: ...J R0128 NRSA02J 103X MG R 10kΩ 1 10W J R0129 NRSA02J 823X MG R 82kΩ 1 10W J R0130 NRSA02J 473X MG R 47kΩ 1 10W J R0131 NRSA02J 273X MG R 27kΩ 1 10W J R0132 NRSA02J 153X MG R 15kΩ 1 10W J R0133 NRSA02J 222X MG R 2 2kΩ 1 10W J R0134 NRSA02J 333X MG R 33kΩ 1 10W J R0135 NRSA02J 222X MG R 2 2kΩ 1 10W J R0136 37 NRSA02J 333X MG R 33kΩ 1 10W J R0138 NRSA02J 473X MG R 47kΩ 1 10W J R0139 NRSA02J 823X MG R...

Page 36: ... NDC21HJ 680X C CAP 68pF 50V J C0159 NDC21HJ 561X C CAP 560pF 50V J C0160 NDC21HJ 102X C CAP 1000pF 50V J C0161 NDC21HJ 680X C CAP 68pF 50V J C0610 NDC21HJ 821X C CAP 820pF 50V J C0611 12 NDC21HJ 470X C CAP 47pF 50V J C0614 NDC21HJ 180X C CAP 18pF 50V J C0616 QETN1CM 107Z E CAP 100µF 16V M Symbol No Part No Part Name Description CAPACITOR C0617 NCB21EK 104X C CAP 0 1µF 25V K C0618 QETN1HM 106Z E C...

Page 37: ...R 4 7kΩ 1 10W J R1516 NRSA02J 222X MG R 2 2kΩ 1 10W J R1517 NRSA02J 472X MG R 4 7kΩ 1 10W J R1518 NRSA02J 682X MG R 6 8kΩ 1 10W J Symbol No Part No Part Name Description RESISTOR R1519 NRSA02J 562X MG R 5 6kΩ 1 10W J R1520 NRSA02J 152X MG R 1 5kΩ 1 10W J R1571 NRSA02J 101X MG R 100Ω 1 10W J R1572 NRSA02J 133X MG R 13kΩ 1 10W J R1573 NRSA02J 821X MG R 820Ω 1 10W J R1608 09 NRSA02J 822X MG R 8 2kΩ 1...

Page 38: ...4Z MF CAP 0 39µF 50V J C1516 NCB21HK 103X C CAP 0 01µF 50V K C1571 NCB21HK 103X C CAP 0 01µF 50V K C1605 QETN1HM 106Z E CAP 10µF 50V M C1606 QETN1EM 227Z E CAP 220µF 25V M Symbol No Part No Part Name Description CAPACITOR C1622 23 QETN1CM 227Z E CAP 220µF 16V M C1624 QETN1EM 476Z E CAP 47µF 25V M C1626 QENC1EM 107Z BP E CAP 100µF 25V M C1627 QETM1EM 228 E CAP 2200µF 25V M C1629 QENC1EM 107Z BP E C...

Page 39: ...223X MG R 22kΩ 1 10W J R0117 18 NRSA02J 823X MG R 82kΩ 1 10W J R0119 20 NRSA02J 391X MG R 390Ω 1 10W J R0123 NRSA02J 104X MG R 100kΩ 1 10W J R0124 25 NRSA02J 101X MG R 100Ω 1 10W J R0126 NRSA02J 333X MG R 33kΩ 1 10W J R0127 NRSA02J 101X MG R 100Ω 1 10W J R0128 NRSA02J 103X MG R 10kΩ 1 10W J R0129 NRSA02J 823X MG R 82kΩ 1 10W J R0130 NRSA02J 473X MG R 47kΩ 1 10W J R0131 NRSA02J 273X MG R 27kΩ 1 10W...

Page 40: ... 01µF 50V K C0150 51 QETN1HM 106Z E CAP 10µF 50V M C0152 53 QETN1HM 105Z E CAP 1 0µF 50V M C0154 55 NDC21HJ 680X C CAP 68pF 50V J C0157 58 NDC21HJ 680X C CAP 68pF 50V J C0159 NDC21HJ 561X C CAP 560pF 50V J C0160 NDC21HJ 102X C CAP 1000pF 50V J C0161 NDC21HJ 680X C CAP 68pF 50V J C0610 NDC21HJ 821X C CAP 820pF 50V J C0611 12 NDC21HJ 470X C CAP 47pF 50V J C0614 NDC21HJ 180X C CAP 18pF 50V J Symbol N...