Toshiba 20N7XE Service Manual Download Page 23

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SPECIFIC INFORMATIONS

 Location

No.

Part No.

Description

 Location

No.

Part No.

Description

C622

24797479

EL, 4.7?F, 

±

20%, 50V

C661

24591102

PF, 1000pF

C662

24591102

PF, 1000pF

C663

24794100

EL, 10?F, 

±

20%, 16V

C664

24591563

PF, 0.056?F

C665

24591563

PF, 0.056?F

C673

24669229

EL, 2.2?F, 

±

20%, 50V

C678

24669229

EL, 2.2?F, 

±

20%, 50V

C681

24668102

EL, 1000?F, 

±

20%, 35V

C682

24668101

EL, 100?F, 

±

20%, 35V

C683

24668102

EL, 1000?F, 

±

20%, 35V

C688

24232103

CD, 0.01?F, +80%, -20%

C690

24668101

EL, 100?F, 

±

20%, 35V

C691

24232103

CD, 0.01?F, +80%, -20%

* C801

24082374

PF, 0.22?F, 

±

20%, AC250V

C805

24092281

CD, 4700pF, 

±

20%, AC250V

C806

24092281

CD, 4700pF, 

±

20%, AC250V

C810

24086857

EL, 560?F, 

±

20%, 400V

* C813

24092567

CD, 1000pF, 

±

20%, AC250V

* C814

24092567

CD, 1000pF, 

±

20%, AC250V

C831

24794470

EL, 47?F, 

±

20%, 16V

C841

24796100

EL, 10?F, 

±

20%, 35V

C842

24794100

EL, 10?F, 

±

20%, 16V

C843

24591104

PF, 0.1?F

C846

24539224

PF, 0.22?F

C860

24214103

CD, 0.01?F, 

±

10%, 500V

C861

24214471

CD, 470pF, 

±

10%, 500V

C862

24082857

PF, 680pF, 

±

2%

C863

24591104

PF, 0.1?F

C864

24092337

CD, 220pF, 

±

10%, 2kV

C866

24539474

PF, 0.47?F

C867

24591272

PF, 2700pF

C868

24676470

EL, 47?F, 

±

20%, 100V

C869

24678229

EL, 2.2?F, 

±

20%, 200V

C870

24820823

PF, 0.082?F, 630V

C871

24092346

CD, 1200pF, 

±

10%, 2kV

C873

24539224

PF, 0.22?F

C876

24539474

PF, 0.47?F

C877

24667470

EL, 47?F, 

±

20%, 25V

C883

24539474

PF, 0.47?F

C884

24640019

EL, 220?F, 

±

20%, 160V

C885

24214471

CD, 470pF, 

±

10%, 500V

C886

24214471

CD, 470pF, 

±

10%, 500V

C889

24668222

EL, 2200?F, 

±

20%, 35V

C891

24082229

PF, 0.1?F, 

±

10%, 250V

C892

24763221

EL, 220?F, 

±

20%, 16V

C893

24092338

CD, 270pF, 

±

10%, 2kV

C894

24092338

CD, 270pF, 

±

10%, 2kV

C898

24212102

CD, 1000pF, 

±

10%

C902

24092345

CD, 1000pF, 

±

10%, 2kV

C904

24436561

CD, 560pF

C905

24436471

CD, 470pF

C907

24436681

CD, 680pF

C910

24669478

EL, 0.47?F, 

±

20%, 50V

C912

24763471

EL, 470?F, 

±

20%, 16V

C913

24794100

EL, 10?F, 

±

20%, 16V

C931

24436101

CD, 100pF

C932

24679479

EL, 4.7?F, 

±

20%, 250V

C971

24794221

EL, 220?F, 

±

20%, 16V

CA02

24436271

CD, 270pF

CA33

24232103

CD, 0.01?F, +80%, -20%

CA36

24436470

CD, 47pF

CA37

24436101

CD, 100pF

CA38

24436101

CD, 100pF

CA68

24794100

EL, 10?F, 

±

20%, 16V

CA69

24232103

CD, 0.01?F, +80%, -20%

CA98

24794100

EL, 10?F, 

±

20%, 16V

CA99

24232103

CD, 0.01?F, +80%, -20%

CB01

24794470

EL, 47?F, 

±

20%, 16V

CB20

24591182

PF, 1800pF

CB21

24212101

CD, 100pF, 

±

10%

CB99

24212681

CD, 680pF, 

±

10%

CS02

24206010

EL, 1?F, 

±

20%, 50V

CS03

24206010

EL, 1?F, 

±

20%, 50V

CS06

24206010

EL, 1?F, 

±

20%, 50V

CS07

24206010

EL, 1?F, 

±

20%, 50V

CS10

24203100

EL, 10?F, 

±

20%, 16V

CS11

24203100

EL, 10?F, 

±

20%, 16V

CS29

24203220

EL, 22?F, 

±

20%, 16V

CV01

24203101

EL, 100?F, 

±

20%, 16V

CV02

24203100

EL, 10?F, 

±

20%, 16V

CV03

24206010

EL, 1?F, 

±

20%, 50V

CV04

24206100

EL, 10?F, 

±

20%, 50V

CV05

24206010

EL, 1?F, 

±

20%, 50V

CV06

24203100

EL, 10?F, 

±

20%, 16V

CV07

24232103

CD, 0.01?F, +80%, -20%

CV08

24203100

EL, 10?F, 

±

20%, 16V

CV09

24232103

CD, 0.01?F, +80%, -20%

CV10

24203100

EL, 10?F, 

±

20%, 16V

CV11

24232103

CD, 0.01?F, +80%, -20%

CV22

24203100

EL, 10?F, 

±

20%, 16V

CV33

24232103

CD, 0.01?F, +80%, -20%

CV34

24762471

EL, 470?F, 

±

20%, 10V

CV36

24763221

EL, 220?F, 

±

20%, 16V

CV39

24203100

EL, 10?F, 

±

20%, 16V

RESISTORS

RESISTORS

RESISTORS

RESISTORS

RESISTORS

R108

24000245

MF, 33k ohm, 

±

1%, 1/4W

R109

24000245

MF, 33k ohm, 

±

1%, 1/4W

R110

24366221

CF, 220 ohm

R111

24366223

CF, 22k ohm

R113

24366333

CF, 33k ohm

R114

24366333

CF, 33k ohm

R115

24366225

CF, 2.2M ohm

R116

24942226

CC, 22M ohm, 1/2W

R156

24382153

OMF, 15k ohm, 1W

R210

24366271

CF, 270 ohm

R211

24366271

CF, 270 ohm

R212

24366271

CF, 270 ohm

R213

24366223

CF, 22k ohm

R214

24366824

CF, 820k ohm

R217

24367183

CF, 18k ohm, 

±

2%

R228

24367362

CF, 3600 ohm, 

±

2%

R301

24366332

CF, 3300 ohm

R303

24321109

MF, 1 ohm, 1/2W

R304

24366393

CF, 39k ohm

R305

24322189

MF, 1.8 ohm, 1W

R306

24366683

CF, 68k ohm

R307

24366823

CF, 82k ohm

R308

24366102

CF, 1k ohm

R313

24366393

CF, 39k ohm

R336

24383271

OMF, 270 ohm, 2W

R370

24321189

MF, 1.8 ohm, 1/2W

R371

24366562

CF, 5600 ohm

R372

24366392

CF, 3900 ohm

R373

24366102

CF, 1k ohm

R374

24366163

CF, 16k ohm

R401

24366104

CF, 100k ohm

Summary of Contents for 20N7XE

Page 1: ...TOSHIBA CORPORATION 1 1 SHIBAURA 1 CHOME MINATO KU TOKYO 105 8001 JAPAN PRINTED IN JAPAN Jan 2001 T SERVICE MANUAL COLOUR TELEVISION S9S Chassis FILE NO 060 200101 20N7XE To CTV ...

Page 2: ...ODE 6 DESIGN MODE 9 ELECTRICAL ADJUSTMENT 10 CIRCUIT CHECK 17 CHAPTER 2 SPECIFIC INFORMATIONS SETTING ADJUSTING DATA 18 LOCATION OF CONTROLS 19 PROGRAMMING CHANNEL MEMORY 20 CIRCUIT BLOCK DIAGRAM 21 CHASSIS AND CABINET REPLACEMENT PARTS LIST 22 PC BOARDS BOTTOM VIEW 29 TERMINAL VIEW OF TRANSISTORS 33 SPECIFICATIONS 37 APPENDIX CIRCUIT DIAGRAMS ...

Page 3: ...assis have special safety related characteristics These characteristics are often passed unnoticed by a visual inspection and the protection afforded by them cannot necessarily be obtained by using replacement components rated for higher voltage wattage etc Replacement parts which have these special safety charac teristics are identified in this manual and its supplements electrical components hav...

Page 4: ...ON YOKE TEMPORARY MOUNTING RUBBER WEDGE ADHESIVE DEFLECTION YOKE PURITY CONVERGENCE MAGNET ASS Y 29 1mm 28 29 25mm 25 19mm 19 20 21 14mm 13 14 Figure 1 COLOR PURITY ADJUSTMENT NOTE Before attempting any purity adjustments the receiver should be operated for at least fifteen minutes 1 Demagnetize the picture tube and cabinet using a degauss ing coil 2 Set the brightness and contrast to maximum 3 Us...

Page 5: ...1 Do not remove cover paper on adhesive part of the wedge 3 Tilt front of the deflection yoke up or down to obtain better convergence in circumference See figure 3 Push the mounted wedge into the space between picture tube and the yoke to fix the yoke temporarily 4 Put other wedge into bottom space and remove the cover paper to stick 5 Tilt front of the yoke right or left to obtain better conver g...

Page 6: ...Service mode display Item Data 3 KEY FUNCTION IN THE SERVICE MODE The following key entry during display of adjustment menu provides special functions A single horizontal line ON OFF button on Remote or a button on TV Test signal selection a button on Remote Selection of the adjustment items CHANNEL s t on TV or Remote Change of the data value VOLUME on TV or Remote Adjustment menu mode ON OFF MEN...

Page 7: ...r item 2 Press and hold the CALL button on the Remote then press the CHANNEL s button on the TV The initialization of QA02 has been complated 3 Check the picture carefully If necessary adjust any adjustment item above Perform Auto search Memory on the owner s manual CAUTION Never attempt to initialize the data unless QA02 has been replaced 7 TEST SIGNAL SELECTION Every pressing of a button on the ...

Page 8: ...r of other modes White Green Normal Red The microcomputer operates to provide judgement of no video signal The red color is still indicated though the signal is input failure may exist in input signal line including QV01 QV01 In case of indication green Normal In case of indication red with input signal Failure may exist in output line including QV01 NOTE Component which controls character display...

Page 9: ...on in the design mode changes the adjustment items in the order of table 3 Refer to table 3 for data of design mode See SETTING ADJUSTING DATA on page 18 3 ADJUSTING THE DATA Pressing of VOLUME s or t button will change the value of data When QA02 is initialized items OPT0 and OPT1 of DESIGN MODE are set to the data of the representative model of this chassis family Therefore because ON SCREEN spe...

Page 10: ...he difference between the belt of vertical re trace and the border of black portion of inside pattern is visible After that return vertical height and con trast ITEM ADJUSTMENT PROCEDURE Belt of vertical retrace HORIZONTAL POSITION ADJUSTMENT HPOS VERTICAL POSITION ADJUSTMENT VPOS 1 Set the TV in service mode and get black or white cross bar signal with VIDEO button on remote hand unit 2 Select ei...

Page 11: ... button provides Horizontal line picture and Normal picture alternately 5 Press VIDEO button to release horizontal line picture and select the two other colors which did not light in the above step with CHANNEL s t buttons Then tap VOLUME buttons so that three colors slightly light in the same level X To correct white balance in light area select GDRV and BDRV with CHANNEL s t buttons to adjust X ...

Page 12: ...ser control to the standard 1 3 Change to adjust SCNT data Q501 SUB ADDR 05 D4 D0 X It makes the point which doesn t have a change and it adjust with screen VR 4 After adjustment return the data which are set in steps 1 2 above to original data 2 SUB COLOR PAL THIS ADJUSTMENT AFTER SUB COLOR NTSC Measuring point Q501 12 B OUT Adjusting signal Sub Bright PAL signal Adjusting method 1 Set BUS data o...

Page 13: ...SECAM color bar signal Adjusting method 1 Set BUS data of Q501 to the same value as that of SUB TINT adjustment 2 Set user control to the standard 1 3 Change COLS data COLC Difference data to adjust the peak amplitude of SECAM color bar 4 After adjustment return the data set in steps 1 2 above to the original data A V B V V p p Adjust the amplitude of color bar ...

Page 14: ...NTC data Q501 SUB ADDR 03 D6D0 so that difference between 6th peak and 5th and 7th peaks of rainbow color bar becomes 2 1 4 After adjustment return the data which are set in steps 1 2 above to original data 5 SUB COLOR NTSC Measuring point Q501 12 B OUT Adjusting signal Sub Bright NTSC signal Adjusting method 1 Set BUS data of Q501 to the same value as that of Sub TINT adjustment 2 Set user contro...

Page 15: ...hat one of lines R G and B will light slightly 5 Change CUTOFF data to adjust so that each one of R G and B will light slightly for about white 6 Release the H Line mode 7 Change B G drive data and R G B CUTOFF data to adjust white balance in bright area and dark area NO ADJUSTMENT 8 SECAM BELL FILTER ADJUSTMENT Measuring point Q501 36 B Y OUT Adjusting signal Color bar SECAM signal Adjusting meth...

Page 16: ...rt 10 CHROMA TRAP ADJUSTMENT NO ADJUSTMENT 11 H CENT ADJUSTMENT Point Receiving adjustment Adjusting signal WG PHILIPS pattern Do not use France SECAM pattern Adjusting method CONT Maximum BRIGHT Center COLOR Center Vary SUB Address HPOS to adjust picture center to screen center Set D C to minimum by CRT adjusting magnetic field 12 V HEIGHT ADJUSTMENT Point Receiving adjustment Adjusting signal WG...

Page 17: ...5 µT 5 µT 50 µT perpendicular field CIRCUIT CHECKS HIGH VOLTAGE CHECK CAUTION There is no HIGH VOLTAGE ADJUSTMENT on this chassis Checking should be done following the steps below 1 Connect an accurate high voltage meter to the second anode of the picture tube 2 Turn on the receiver Set the BRIGHTNESS and CONTRAST controls to minimum zero beam current 3 High voltage must be measured below B kV Ref...

Page 18: ... SUB COLOUR SECAM BELL FILTER RCUT GCUT BCUT GDRV BDRV SCNT BRTC COLC COLP COLS BELL Preset Data 20H 20H 20H 80H 80H 07H 80H 80H F6H F6H 01H Item Name of adjustment Preset Data Table 1 SBY SRY TNTC HPOS VPOS HIT VLIN WID PARA CNR TRAP SECAM B Y SECAM R Y SUB TINT HORIZ POSITION VERT POSITION HEIGHT V LINEARITY PICTURE WIDTH E W PARABOLA DPC E W CORNER TRAPEZIUM 08H 08H 40H 0AH 03H 30H 0CH 28H 1FH ...

Page 19: ...NE JACK TV VIDEO MENU CALL On screen call Direct select Power on Digit select MENU Menu open close Level down in each function t s Menu select o Sound Mute f Power on standby Volume down up Channel select Position down up a TV VIDEO select h Picture control 8 Sound control INFRARED RECEIVING WINDOW POWER SWITCH POWER INDICATOR CHANNEL UP DOWN VOLUME UP DOWN Level up in each function LOCATION OF CO...

Page 20: ... 12 is set press MENU several times to display the SET UP menu screen Press t s to select the item POSITION And press repeatedly to set the position number P12 Pressing displays a smaller number pressing displays a larger number 3 When Position 12 is set press t s to select the item Press to complete the presetting To turn off the menu function display instantly Press the CALL button Skip function...

Page 21: ... AV SW VIDEO S VIDEO SW AV IN 1 MEMORY QT01 TEXT µ COM I 2 C BUS OSD HYBRID CONVERTER TRANS B VOLTAGE Y C RGB CHROMA VIDEO DEF Q501 VIDEO OUT Q901 Q903 Q905 V OUT H OUT ERROR AMP REGULATOR RESET Q840 F B T H V D Y V H CRT Q301 Q401 AUDIO OUT HEAD PHONE L R BUS CONTROL BLOCK SV V L R R AV IN 2 V L R MONITOR OUTPUT V L ...

Page 22: ...0 50V C214 24232103 CD 0 01 F 80 20 C215 24794470 EL 47 F 20 16V C216 24797010 EL 1 F 20 50V C217 24797479 EL 4 7 F 20 50V C218 24591104 PF 0 1 F C302 24617912 EL 2 2 F 10 50V C304 24214471 CD 470pF 10 500V C305 24617912 EL 2 2 F 10 50V C306 24795102 EL 1000 F 20 25V C307 24082049 PF 0 047 F 100V C308 24668101 EL 100 F 20 35V C309 24591102 PF 1000pF C310 24796102 EL 1000 F 20 35V C311 24214391 CD ...

Page 23: ...79 EL 4 7 F 20 250V C971 24794221 EL 220 F 20 16V CA02 24436271 CD 270pF CA33 24232103 CD 0 01 F 80 20 CA36 24436470 CD 47pF CA37 24436101 CD 100pF CA38 24436101 CD 100pF CA68 24794100 EL 10 F 20 16V CA69 24232103 CD 0 01 F 80 20 CA98 24794100 EL 10 F 20 16V CA99 24232103 CD 0 01 F 80 20 CB01 24794470 EL 47 F 20 16V CB20 24591182 PF 1800pF CB21 24212101 CD 100pF 10 CB99 24212681 CD 680pF 10 CS02 2...

Page 24: ...F 47 ohm 1 2W R867 24366134 CF 130k ohm R868 24552103 OMF 10k ohm 1 2W R870 24381151 OMF 150 ohm 1 2W R871 24988011 MF 1 ohm 1 2W R872 24377224 CF 220k ohm 1W R874 24366104 CF 100k ohm R883 24552752 OMF 7500 ohm 1 2W R884 24552752 OMF 7500 ohm 1 2W R890 24381333 OMF 33k ohm 1 2W R891 24366102 CF 1k ohm R899 24005015 Metal Glazed Resistor 8 2M ohm 1W R901 24552122 OMF 1200 ohm 1 2W R902 24552122 OM...

Page 25: ... ohm RV30 24366750 CF 75 ohm RV31 24366820 CF 82 ohm RV37 24366820 CF 82 ohm RV87 24366332 CF 3300 ohm RV88 24366102 CF 1k ohm RV89 24366122 CF 1200 ohm RV90 24366101 CF 100 ohm RV91 24366101 CF 100 ohm RV93 24366103 CF 10k ohm RV95 24366103 CF 10k ohm COILS TRANSFORMERS COILS TRANSFORMERS COILS TRANSFORMERS COILS TRANSFORMERS COILS TRANSFORMERS L301 23103938 Coil Ferrite Bead TEM2003 L302 2328968...

Page 26: ... B2 D430 23118859 Diode 1SS133 D431 23118521 Diode Zener RD8 2ESA B1 D441 23118516 Diode Zener RD9 1ESA B3 D610 23118859 Diode 1SS133 D611 23118859 Diode 1SS133 D612 23118859 Diode 1SS133 D615 23118859 Diode 1SS133 D616 23118859 Diode 1SS133 D617 23118859 Diode 1SS133 D618 23118859 Diode 1SS133 D619 23118859 Diode 1SS133 D801 23316275 Diode RBV 606 LFA D830 23118528 Diode Zener RD5 6ESA B3 D842 23...

Page 27: ...EMBLIES PC BOARD ASSEMBLIES PC BOARD ASSEMBLIES U901 23783989 CRT Drive Board PB9165 U902 23785954 Main Board PD0007 U903 23783501 B AV Board PB8980 PICTURE TUBE PICTURE TUBE PICTURE TUBE PICTURE TUBE PICTURE TUBE V901 23312830 Picture Tube A48LRH94X W TUNER TUNER TUNER TUNER TUNER H001 23321351 Tuner ECA14X9 ACCESSORIES ACCESSORIES ACCESSORIES ACCESSORIES ACCESSORIES K902 23306191 Remote Hand Uni...

Page 28: ... 28 SPECIFIC INFORMATIONS THIS PAGE IS INTENTIONALLY LEFT BLANK ...

Page 29: ... 29 30 MAIN BOARD PD0007 BOTTOM FOIL SIDE ...

Page 30: ... 31 32 BACK TERM AV BOARD PB8980 BOTTOM FOIL SIDE CRT DRIVE BOARD PB9165 BOTTOM FOIL SIDE ...

Page 31: ...69 2SC4544 2SA1788 2SA1306 2SA1186A 2SC752GTM 2SC2482 2SC2655 2SC4721P 2SC752 2SA562TM 2SA1015 2SC1815 2SC2878 2SC1740S 2SC2120 2SA9335 2SA1788 RN2203 RN2201 RN2004 RN1203 RN1204 RN2204 RN1205 RN1202 RN1201 2SD1554 2SD2253 2SD2553 2SD1556 2SC5143 E C B B C E BCE B CE E C B E C B B C E B C E ON4409 ...

Page 32: ... 34 SPECIFIC INFORMATIONS MEMO ...

Page 33: ... 35 SPECIFIC INFORMATIONS MEMO ...

Page 34: ... 36 SPECIFIC INFORMATIONS MEMO ...

Page 35: ...l 1 Aerial Adaptor 1 Please refer to owner s manual in detail Television system and channel coverage Aerial input CHANNEL SYSTEM PAL B G CCIR VHF 2 12 UHF 21 69 CATV 1 PAL D K CHINA VHF 1 12 UHF 13 57 CATV 2 PAL I UK UHF 21 69 SECAM B G CCIR VHF 2 12 UHF 21 69 CATV 1 SECAM D K OIRT VHF 1 12 UHF 21 69 CATV 3 NTSC M US VHF 2 13 UHF 14 69 CATV 4 NTSC 4 43 5 5 6 0 6 5MHz NTSC 3 58 5 5 6 0 6 5MHz PAL 6...

Page 36: ...TOSHIBA CORPORATION 1 1 SHIBAURA 1 CHOME MINATO KU TOKYO 105 8001 JAPAN PRINTED IN JAPAN Jan 2001 T SERVICE MANUAL COLOUR TELEVISION S9S Chassis FILE NO 060 200101 20N7XE next page ...

Page 37: ...tors are 1 6W and 5 tolerance carbon resistor unless otherwise noted as the following marks 1 2R Metal or Metal oxide of 1 2 watt 1 2S Carbon compsistion of 1 2 watt 1RF Fuse resistor of 1 watt 10W Cement of 10 watt K 10 G 2 F 1 2 CAPACITOR Unless otherwise noted in schematic all capacitor values less than 1 are expressed in F and the values more than 1 in pF All capacitors are ceramic 50V unless ...

Page 38: ...GITAL MULTI METER from point indicated to chassing ground using a color bar signal with all controls at normal line voltage 220 volts 5 Waveforms are taken receiving color bar signal with enough sensitivity 6 Voltage reading shown are nominal values and may vary 20 except H V NOTE 1 RESISTOR Resistance is shown in ohm K 1 000 M 1 000 000 All resistors are 1 6W and 5 tolerance carbon resistor unles...

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