Toshiba 27AF42 Service Manual Download Page 1

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TOSHIBA CORPORATION

1-1, SHIBAURA 1- CHOME, MINATO-KU, TOKYO 105-8001, JAPAN

FILE NO. 020-200202

SERVICE MANUAL

COLOR TELEVISION

N2F Chassis

27AF62

27AF42

PUBLISHED IN JAPAN,

Apr. 2002

(TAC0201)

(TAC0202)

Summary of Contents for 27AF42

Page 1: ...TOSHIBA CORPORATION 1 1 SHIBAURA 1 CHOME MINATO KU TOKYO 105 8001 JAPAN FILE NO 020 200202 SERVICE MANUAL COLOR TELEVISION N2F Chassis 27AF62 27AF42 PUBLISHED IN JAPAN Apr 2002 So TAC0201 TAC0202 ...

Page 2: ...DE 8 DESIGN MODE 11 ELECTRICAL ADJUSTMENT 12 CIRCUIT CHECKS 15 CHAPTER 2 SPECIFIC INFORMATIONS SETTING ADJUSTING DATA 16 LOCATION OF CONTROLS 17 PROGRAMMING CHANNEL MEMORY 19 CHASSIS AND CABINET REPLACEMENT PARTS LIST 20 PC BOARDS BOTTOM VIEW 29 TERMINAL VIEW OF TRANSISTORS 35 CIRCUIT BLOCK DIAGRAM 38 SPECIFICATIONS END APPENDIX CIRCUIT DIAGRAM ...

Page 3: ...limit consti tutes a potential shock hazard and must be corrected im mediately WARNING Service should not be attempted by anyone unfa miliar with the necessary precautions on this receiver The fol lowing are the necessary precautions to be observed before servicing this chassis 1 An isolation Transformer should be connected in the power line between the receiver and the AC line before any serv ice...

Page 4: ...ASS CLOTH TAPES DEFLECTION YOKE TEMPORARY MOUNTING RUBBER WEDGE ADHESIVE DEFLECTION YOKE PURITY CONVERGENCE MAGNET ASS Y 14mm 13 14 19mm 19 20 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: ...RAST and BRIGHTNESS Controls to the maximum 3 Display built in green raster using the TEST SIGNAL SELECTION function 4 Loosen the clamp screw holding the deflection yoke and remove the Rubber Wedges 5 Slide the yoke forward or backward to provide vertical green belt zone in the picture screen 6 Rotate and spread the tabs of the purity magnet See figure 3 around the neck of the picture tube until t...

Page 7: ...ing the CENTER CONVERGENCE AD JUSTMENT tighten the tightening ring to fix the mag nets Figure 4 Xv COIL ADJUSTMENT Adjust the Xv coil on the deflection yoke to correct misconvergence at both sides on screen Use a hexagonal tip stick plastic to adjust the core of coil BLU BLU RED RED 6 POLE MAGNETS MOVEMENT 4 POLE MAGNETS MOVEMENT RED BLUE RED BLUE GRN GRN Center Convergence by Convergence Magnets ...

Page 8: ...splay of adjustment menu provides special functions A single horizontal line ON OFF TV ANT VIDEO button on TV Test signal selection TV ANT VIDEO button on Remote Selection of the adjustment items Channel s t on TV or Remote Change of the data value Volume s t on TV or Remote Adjustment menu mode ON OFF MENU button on TV Initialization of the memory QA02 RECALL Channel button on TV s Initialization...

Page 9: ...ture carefully If necessary adjust any adjustment item above Perform Programming Channel Memory on the owner s manual CAUTION Never attempt to initialize the data unless QA02 has been replaced 7 TEST SIGNAL SELECTION 1 Every pressing of TV VIDEO button on the Remote Control in the Service mode changes the built in test patterns on screen in the following order Normal picture Black cross bar on gre...

Page 10: ...ion circuit current limiter 000 is normal BUS line check OK Normal NG SCL GND or SAD GND short circuit BUS line ACK acknowledge check OK Normal Display of Location Number NG Display example QA02 NG H001 NG Q501 NG etc Note The indication of failure place is only one place though failure places are plural When repair of a failure place finishes the next failure place is indicated The order of prior...

Page 11: ...hanges the adjustment items in the order of table 3 s button for reverse order Refer to table 3 for data of design mode See SETTING ADJUSTING DATA on page 16 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 and OPT2 of DESIGN MODE are set to the data of the representative model of this chassis family Therefore because ...

Page 12: ... the RESET button 3 Connect oscilloscope to base of Q906 on CRT D board 4 Enter the service mode then select COLC 5 Adjust the SUB COLOR by pressing the VOLUME s or t button to achieve about 1V0 p of blue bar 6 Select TNTC register 7 Adjust the data value to obtain the blue bar to magenta bar ratio of 3 2 as shown 8 Select COLC register 9 Adjust the data value to achieve 1 8V0 p of blue bar on sco...

Page 13: ...imum 2 Call up the adjustment mode display and press the TV VIDEO button on Remote until the white and black pattern appears on the screen 3 Adjust the following item with the CHANNEL s t and VOLUME s t buttons 4 Press the TV VIDEO button on TV to display a single horizontal line on the screen 5 Turn the SCREEN control FBT fully counterclockwise and gradually rotate clockwise until the first horiz...

Page 14: ... pin 34 of QG01 4 Change data by VOLUME s t button to minimize AC output level on scope 5 Resolder SL02 STEREO 300Hz 30 mod R channel only ANT 1 Display item WBAN on screen 2 Connect oscilloscope to pin 35 of QG01 3 Change data by VOLUME s t buttons so that 300Hz element on scope becomes minimum STEREO 3kHz 30 mod R channel only ANT 1 Display item SPEC on screen 2 Connect oscilloscope to pin 35 of...

Page 15: ...HTNESS and CON TRAST controls to minimum zero beam current 3 High voltage must be measured below B kV Refer to table 1 for high voltage B See SETTING ADJUSTING DATA on page 16 4 Vary the BRIGHTNESS control to both extremes to be sure the high voltage does not exceed the limit under any con ditions FS CIRCUIT CHECK The Fail Safe FS circuit check is indispensable for the final check in servicing Che...

Page 16: ...STEREO SEPARATION HORIZ POSITION VERT POSITION Item Name of adjustment Preset HIT LIN VSC VPS VCP WID DPC CNR TRAP HCP VFC PCOL PHUE PGOF PROF PBOF RGBB HEIGHT V LINEARITY V S CORRECTION V SHIFT V COMPENSATION PICTURE WIDTH E W PARABOLA DPC E W CORNER TRAPEZIUM H COMPENSATION V F CORRECTION PIP COLOR PIP TINT PIP PIP PIP RGB BRIGHT 20H 08H 04H 01H 03H 17H 0CH 02H 06H 00H 0FH 0FH 11H 36H 17H 17H 0B...

Page 17: ...O S VIDEO COLOR STREAM INPUT VIDEO Y PB PM VIDEO1 AUDIO VIDEO2 R L MONO VIDEO ANT1 AUDIO R L AUDIO OUT DVD IN ANT 75Ω IN OUT ANT2 LOCATION OF CONTROLS Representative 27AF62 Front view Rear view VIDEO AUDIO terminals TV VIDEO CHANNEL t s VOLUME T S MENU POWER Remote sensor POWER indicator Antenna Cable terminals VIDEO 3 IN Rear Term ...

Page 18: ...CATE SWAP TV VCR REW FF STOP SOURCE FAV FAV C C A P T E X I T M E N U R E S E T 1 4 7 2 5 8 3 6 9 0 100 ENTER Remote Control LIGHT TV CABLE VCR switch Set to TV to control the TV MUTE Channel Number C CAPT ENTER FAV t RESET PIP CH t RECALL POWER TIMER TV VIDEO CHANNEL s t VOLUME s t CH RTN PIP CH s FAV s EXIT MENU PIP functions For TV and CABLE modes s t T S ...

Page 19: ...nnel you want to erase using the CHAN NEL s or t button or select the channel you want to add using the Channel Number buttons 2 Press MENU then press S or T until the SET UP menu appears 3 Press t or s until ADD ERASE is highlighted 4 Press S or T To erase the channel Press the button until ERASE is highlighted To add the channel Press the button until ADD is highlighted 5 Repeat steps 1 to 4 for...

Page 20: ... 2UF M C360 24793221 ELECTROLYTIC 10V 220UF M C361 24794101 ELECTROLYTIC 16V 100UF M C366 24693104 PLASTIC FILM 100V 0 1UF J C370 24668101 ELECTROLYTIC 35V 100UF M 3A C371 24668100 ELECTROLYTIC 35V 10UF M 3A C400 24503041 PLASTIC FILM 63V 0 1UF J C403 24591103 PLASTIC FILM 50V 0 01MF J C404 24797010 ELECTROLYTIC 50V 1UF M C407 24503041 PLASTIC FILM 63V 0 1UF J C408 24591273 PLASTIC FILM 50V 0 027U...

Page 21: ...C 200V 470UF M 3F C811 24092583 CERAMIC DISC AC250V E 2200PF M C812 24092583 CERAMIC DISC AC250V E 2200PF M C813 24092581 CERAMIC DISC AC250V E 1000PF M C817 24092339 CERAMIC DISC 2KV 330PF K C818 24082402 PLASTIC FILM 1250VH 2200PF H C821 24214221 CERAMIC DISC 500V B 220PF K C823 24212471 CERAMIC DISC 50V B 470PF K C829 24591152 PLASTIC FILM 50V 1500PF J C830 24503047 PLASTIC FILM 63V 0 33UF J C8...

Page 22: ...7MF J CV25 24794220 ELECTROLYTIC 16V 22UF M CV27 24206108 ELECTROLYTIC 50V 0 1UF M 7L 3A CV29 24232103 CERAMIC DISC 50V F 10000PF Z CV31 24503041 PLASTIC FILM 63V 0 1UF J CV38 24763471 ELECTROLYTIC 16V 470UF M CV39 24232103 CERAMIC DISC 50V F 10000PF Z CV41 24591223 PLASTIC FILM 50V 0 022MF J CV45 24232103 CERAMIC DISC 50V F 10000PF Z 27AF62 CV46 24794101 ELECTROLYTIC 16V 100UF M 27AF62 CV47 24794...

Page 23: ...27562 METAL FILM 1 4W 5 6K OHM F R483 24366103 CARBON FILM 1 6W 10K OHM J R485 24338568 OXIDE METAL FILM 1W 0 56 OHM J R486 24552820 OXIDE METAL FILM 1 2W 82 OHM J R487 24552301 OXIDE METAL FILM 1 2W 300 OHM J R488 24327183 METAL FILM 1 4W 18K OHM F R489 24327183 METAL FILM 1 4W 18K OHM F R490 24366102 CARBON FILM 1 6W 1K OHM J R493 24366102 CARBON FILM 1 6W 1K OHM J R494 24366471 CARBON FILM 1 6W...

Page 24: ...ON FILM 1 6W 1 2K OHM J R978 24366102 CARBON FILM 1 6W 1K OHM J R979 24366102 CARBON FILM 1 6W 1K OHM J R980 24366471 CARBON FILM 1 6W 470 OHM J R981 24366821 CARBON FILM 1 6W 820 OHM J R982 24366103 CARBON FILM 1 6W 10K OHM J R983 24366222 CARBON FILM 1 6W 2 2K OHM J R984 24367152 CARBON FILM 1 6W 1 5K OHM G R985 24367471 CARBON FILM 1 6W 470 OHM G R986 24367681 CARBON FILM 1 6W 680 OHM G R987 24...

Page 25: ...66102 CARBON FILM 1 6W 1K OHM J 27AF62 RR04 24366472 CARBON FILM 1 6W 4 7K OHM J 27AF62 RR05 24366102 CARBON FILM 1 6W 1K OHM J 27AF62 RR06 24366472 CARBON FILM 1 6W 4 7K OHM J 27AF62 RR07 24366681 CARBON FILM 1 6W 680 OHM J RR08 24366682 CARBON FILM 1 6W 6 8K OHM J RR93 24366472 CARBON FILM 1 6W 4 7K OHM J RS02 24366562 CARBON FILM 1 6W 5 6K OHM J RS04 24366562 CARBON FILM 1 6W 5 6K OHM J RS08 24...

Page 26: ...J LZ02 23238714 COIL PEAKING TRF4100AJ LZ03 23238714 COIL PEAKING TRF4100AJ LZ04 23238714 COIL PEAKING TRF4100AJ LZ05 23238714 COIL PEAKING TRF4100AJ LZ08 23238707 COIL PEAKING TRF4390AJ LZ11 23238710 COIL PEAKING TRF4220AJ LZ12 23238710 COIL PEAKING TRF4220AJ T400 23224364 TRANSFORMER FOCUS TLN2168AH T401 23224367 TRANSFORMER HORIZ DRIVER TLN1098AH T461Z 23236741 TRANSFORMER FBT TFB4191ZD T801 23...

Page 27: ...S120 7 D224 23316817 DIODE 1SS120 7 D252 23118518 DIODE ZENER RD9 1ES D253 23118518 DIODE ZENER RD9 1ES D301 23118095 DIODE ERB44 06 D302 23118095 DIODE ERB44 06 D310 23118859 DIODE 1SS133 D316 23316679 DIODE ZENER MTZJ6 8C D319 23316719 DIODE ZENER MTZJ12B D370 23316672 DIODE ZENER MTZJ5 6B D371 23118859 DIODE 1SS133 D404 23316254 DIODE ERC06 15 D406 23118094 DIODE EU2A D408 23357353 DIODE FML G2...

Page 28: ...C 125V10A HSV 1 CMC 02P P910 23164725 PLUG 2P PV011 23365863 JACK PIN JACK 2S6P JXT1140 01008 PV02 23365949 JACK 5P 1E OFF 2R OFF 2L OFF JALC PV03 23365821 PIN JACK 1E OFF 1R OFF 1L OFF JACK 3P PV04 23365763 JACK PIN 3P PZ01 23368130 CONNECTOR 10P PZ01A 23902213 CONNECTOR 10P SA01 23145430 SWITCH PUSH SKHHLMA010 SA02 23145430 SWITCH PUSH SKHHLMA010 SA03 23145430 SWITCH PUSH SKHHLMA010 SA04 2314543...

Page 29: ... 29 30 SIGNAL BOARD PD0654A BOTTOM FOIL SIDE ...

Page 30: ... 31 32 POWER DEF BOARD PD0653A BOTTOM FOIL SIDE ...

Page 31: ... 33 CRT DRIVE BOARD PB9973H2 BOTTOM FOIL SIDE ...

Page 32: ... 34 3L BOARD PB9398A BOTTOM FOIL SIDE ...

Page 33: ...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 2SD1556 2SD2553 2SC5143 E C B B C E BCE B CE B C E E C B E C B ON4409 B C E ...

Page 34: ... 36 SPECIFIC INFORMATIONS THIS PAGE IS INTENTIONALLY LEFT BLANK ...

Page 35: ...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 otherwise noted as the following marks Electolytic capacitor Mylar capacitor 3 The parts indicated with have special characteristics and should be replaced with identical parts only 4 ...

Page 36: ... 38 SPECIFIC INFORMATIONS QG01 DIG Comb ZY01 PIP Module CIRCUIT BLOCK DIAGRAM ...

Page 37: ...PE 2 3 8 x 4 3 4 inches 60 x 120 mm VIDEO AUDIO TERMINALS S VIDEO INPUT Y 1V p p 75 ohm negative sync C 0 286V p p burst signal 75 ohm VIDEO AUDIO INPUT VIDEO 1V p p 75 ohm negative sync AUDIO 150mV rms 30 modulation equivalent 47k ohm ColorStream Color Difference VIDEO AUDIO INPUT Y 1V p p 75 ohm Cr 0 7V p p 75 ohm Cb 0 7V p p 75 ohm AUDIO 2V p p 1 kohm DIMENSIONS Width 785 mm Height 584 mm Depth...

Page 38: ...TOSHIBA CORPORATION 1 1 SHIBAURA 1 CHOME MINATO KU TOKYO 105 8001 JAPAN FILE NO 020 200202 SERVICE MANUAL COLOR TELEVISION N2F Chassis 27AF62 27AF42 PUBLISHED IN JAPAN Apr 2002 So TAC0201 TAC0202 ...

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