Toshiba 27AF41 Service Manual Download

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TOSHIBA CORPORATION

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

FILE NO. 020-200103

SERVICE MANUAL

COLOR TELEVISION

N1N Chassis

27AF61

27AF41

PUBLISHED IN JAPAN,

May., 2001

(TAC0115)

(TAC0116)

Summary of Contents for 27AF41

Page 1: ...FILE NO 020 200103 SERVICE MANUAL COLOR TELEVISION N1N Chassis 27AF61 27AF41 PUBLISHED IN JAPAN May 2001 So TAC0115 TAC0116 ...

Page 2: ...ODE 8 DESIGN MODE 11 ELECTRICAL ADJUSTMENT 12 CIRCUIT CHECKS 16 CHAPTER 2 SPECIFIC INFORMATIONS SETTING ADJUSTING DATA 17 LOCATION OF CONTROLS 18 PROGRAMMING CHANNEL MEMORY 20 CIRCUIT BLOCK DIAGRAM 21 CHASSIS AND CABINET REPLACEMENT PARTS LIST 22 PC BOARDS BOTTOM VIEW 33 TERMINAL VIEW OF TRANSISTORS 39 SPECIFICATIONS 41 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 ic...

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 17 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: ...omes in the center of range for STA3 1 SAP FILTER SAPF 4 88kHz 110mVrms pin 9 of H002 Monaural signal ANT 1 Display item SAPF 2 Change data by Volume s t buttons so that the data becomes in the center of range for STA4 1 SAVC STA7 0 STA8 1 88H STRF STA3 1 16H SAPF 98H STA4 1 ATTENUATOR ATT 5 1kHz 30 mod ANT terminal 1 Connect rms meter to pin 12 of H002 2 Display item ATT on screen 3 Change data b...

Page 15: ...nnect oscilloscope to pin 34 of QG01 4 Change data by VOLUME s t button to minimize AC output level on scope 5 Resolder SL02 H001 QG01 SL02 CG44 RG44 CG07 15 734KHz 30mV rms RG43 10 7 1 STEREO 300Hz 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 R channel only A...

Page 16: ...TNESS 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 17 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 Chec...

Page 17: ...TRAL STEREO SEPARATION HORIZ POSITION VERT POSITION Item Name of adjustment Preset HIT LIN VSC VPS VCP WID DPC CNR TRAP HCP VFC PCOL PHUE DAC 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 DAC PIP PIP PIP RGB BRIGHT 1EH 06H 04H 1BH 03H 18H 0AH 07H 09H 00H 0FH 0FH 11H 0...

Page 18: ...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 27AF61 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 19: ...TILL LOCATE SWAP TV VCR REW FF STOP SOURCE FAV FAV C CAPT EXIT MENU RESET 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 20: ...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 21: ... 21 GENERAL ADJUSTMENTS SPECIFIC INFORMATIONS QZ01 DIG Comb ZY01 PIP Module CIRCUIT BLOCK DIAGRAM ...

Page 22: ... 20 35V C391 24666100 EL 10 F 20 16V C393 24666100 EL 10 F 20 16V C396 24082825 PF 1800pF 3 1800V C399 24085981 EL 10 F 20 16V Non Polar C400 24503041 PF 0 1 F 63V C403 24591103 PF 0 01 F C404 24797010 EL 1 F 20 50V C407 24503041 PF 0 1 F 63V C409 24763221 EL 220 F 20 16V 27AF61 C410 24232103 CD 0 01 F 80 20 C413 24214821 CD 820pF 10 500V C415 24567273 PF 0 027 F C416 24678010 EL 1 F 20 200V C417 ...

Page 23: ...6561 CD 560pF C726 24212102 CD 1000pF 10 C801 24503002 PF 0 22 F 20 AC275V C802 24503001 PF 0 1 F C805 24092623 CD 0 01 F 80 20 AC250V C806 24092623 CD 0 01 F 80 20 AC250V C808 24667221 EL 220 F 20 25V C810 24086057 EL 680 F 20 200V C811 24092597 CD 4700pF 20 AC250V C811A 23960136 Adhesive TSE3843 W C812 24092597 CD 4700pF 20 AC250V C813 24092597 CD 4700pF 20 AC250V C815 24092597 CD 4700pF 20 AC25...

Page 24: ...50V CS40 24797010 EL 1 F 20 50V CS42 24797010 EL 1 F 20 50V CS43 24436331 CD 330pF CS44 24436331 CD 330pF CS45 24436331 CD 330pF CS46 24436331 CD 330pF CS47 24436331 CD 330pF CS48 24436331 CD 330pF CS49 24436331 CD 330pF CS50 24436331 CD 330pF CS51 24212102 CD 1000pF 10 CS52 24212102 CD 1000pF 10 CS70 24794220 EL 22 F 20 16V CS71 24794220 EL 22 F 20 16V CS115 24206010 EL 1 F 20 50V CS116 24206010 ...

Page 25: ...MF 270 ohm 2W R353 24366621 CF 620 ohm R360 24366104 CF 100k ohm R361 24366473 CF 47k ohm R362 24366103 CF 10k ohm R363 24366105 CF 1M ohm R364 24366103 CF 10k ohm R365 24366681 CF 680 ohm R366 24366431 CF 430 ohm R367 24366103 CF 10k ohm R368 24545479 FR 4 7 ohm 1 4W R369 24366391 CF 390 ohm R370 24321109 MF 1 ohm 1 2W R371 24366103 CF 10k ohm R372 24366392 CF 3900 ohm R373 24366102 CF 1k ohm R37...

Page 26: ...0 24548569 FR 5 6 ohm 2W R831 24366561 CF 560 ohm R835 24552471 OMF 470 ohm 1 2W R850 24322759 MF 7 5 ohm 1W R851 24366561 CF 560 ohm R861 24553153 OMF 15k ohm 1W R883 24552102 OMF 1k ohm 1 2W R884 24366471 CF 470 ohm R888 24321228 MF 0 22 ohm 1 2W R891 24366102 CF 1k ohm R898 24002000 CC 3 9M ohm 10 1 2W R901 24376561 CF 560 ohm 1 2W R902 24376561 CF 560 ohm 1 2W R903 24376561 CF 560 ohm 1 2W R90...

Page 27: ...366622 CF 6200 ohm R4769 24366102 CF 1k ohm RA02 24366102 CF 1k ohm 27AF61 RA03 24366102 CF 1k ohm RA04 24366102 CF 1k ohm RA05 24366102 CF 1k ohm RA06 24366102 CF 1k ohm RA07 24366102 CF 1k ohm RA08 24366102 CF 1k ohm RA09 24366102 CF 1k ohm RA10 24366103 CF 10k ohm 27AF61 RA13 24366103 CF 10k ohm RA14 24366102 CF 1k ohm RA15 24366102 CF 1k ohm RA16 24366102 CF 1k ohm RA17 24366102 CF 1k ohm RA18...

Page 28: ...3 CF 10k ohm RS111 24366222 CF 2200 ohm RS113 24366103 CF 10k ohm RS115 24366222 CF 2200 ohm RS611 24366101 CF 100 ohm RS612 24366101 CF 100 ohm RS613 24366101 CF 100 ohm RS614 24366101 CF 100 ohm RV02 24366750 CF 75 ohm RV04 24366750 CF 75 ohm RV05 24366750 CF 75 ohm RV07 24366103 CF 10k ohm RV09 24366750 CF 75 ohm RV10 24366750 CF 75 ohm RV11 24366100 CF 10 ohm RV12 24366103 CF 10k ohm RV13 2436...

Page 29: ...5610 IC LA7846N Q301B 72471082 Screw BRDT2W3X10 SZN Q302 B0385853 IC TA1241AN Q306 23114530 Transistor 2SA933S Q Q308 23114528 Transistor 2SC1740S Q Q360 23114528 Transistor 2SC1740S Q Q361 23314445 Transistor 2SC4721 Q Q370 23114530 Transistor 2SA933S Q Q390 B0350510 IC TA75558S Q391 23314548 Transistor 2SC4256 Q402 A6330069 Transistor 2CS2482 FA 1 Q403 23314444 Transistor 2SC4721P Q404 A6873777 ...

Page 30: ...e Zener MTZJ6 8C D335 23316715 Diode Zener MTZJ11A D336 23316672 Diode Zener MTZJ5 6B D337 23316672 Diode Zener MTZJ5 6B D338 23316655 Diode Zener MTZJ3 0B D370 23316672 Diode Zener MTZJ5 6B D371 23118859 Diode 1SS133 D390 23316651 Diode Zener MTZJ2 4B D395 23316725 Diode Zener MTZJ15B D404 23316254 Diode ERC06 15L D406 23118094 Diode EU2A LF F10 D408 23118052 Diode RU4Z LF L1 D409 23316690 Diode ...

Page 31: ...1A 23902213 Socket B B 10P SA01 23145430 Switch Push 1C1P SA02 23145430 Switch Push 1C1P SA03 23145430 Switch Push 1C1P SA04 23145430 Switch Push 1C1P SA05 23145430 Switch Push 1C1P SA06 23145430 Switch Push 1C1P SA07 23145430 Switch Push 1C1P SJ01 23146958 Relay DC12V SR81 23146564 Relay DC12V SR83 23146564 Relay DC12V W661 23351088 Speaker SPK 1360 60X120mm 8 ohm W662 23351088 Speaker SPK 1360 6...

Page 32: ... 32 SPECIFIC INFORMATIONS THIS PAGE IS INTENTIONALLY LEFT BLANK ...

Page 33: ... 33 34 SIGNAL BOARD PB9966 BOTTOM FOIL SIDE ...

Page 34: ... 35 36 POWER DEF BOARD PD0154 BOTTOM FOIL SIDE ...

Page 35: ... 37 CRT DRIVE BOARD PB9973 BOTTOM FOIL SIDE ...

Page 36: ... 38 3L BOARD PB9398 BOTTOM FOIL SIDE ...

Page 37: ...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 38: ... 40 SPECIFIC INFORMATIONS MEMO ...

Page 39: ...POWER 5W 5W SPEAKER TYPE 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 ...

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