Toshiba 20AR33, Service Manual

Page 1: ...TOSHIBA FILE NO 050 200337 SERVICE MANUAL COLOR TELEVISION 20AR33 DOCUMENT CREATED IN JAPAN Aug 2003 MTS STEREO AUTO VOLTAGE ...

Page 2: ...ET 39 Page CONTENTS SERVICE MANUAL MODELS POWER INPUT 110 220 V AC 50 60 Hz POWER RATING 20AR33 79 W PICTURE SIZE 1 192 cm2 185sq inch CONVERGENCE Magnetic SWEEP DEFLECTION Magnetic FOCUS QPF Electrostatic INTERMEDIATE FREQUENCIES Picture IF Carrier Frequency 45 75 MHz Sound IF Carrier Frequency 41 25 MHz Color Sub Carrier Frequency 42 17 MHz Nominal AUDIO POWER OUTPUT RATING 20AR33 3 0 3 0 W at 1...

Page 3: ...exceed the specified value and that it is regulating correctly 5 Do not use a picture tube other than that specified or make unrecommended circuit modifications to the high voltage circuitry 6 When trouble shooting and taking test measurements on a receiver with excessive high voltage avoid being unnecessarily close to the receiver Do not operate the receiver longer than is necessary to locate the...

Page 4: ...hanical insulators and etc 3 To be sure that no shock hazard exists check for leakage current in the following manner Plug the AC cord directly into a 110 220 volt AC outlet Do not use an isolation transformer for this test Using two clip leads connect a 1 5k ohm 10 watt resistor paralleled by a 0 15µF capacitor in series with all exposed metal cabinet parts and a known earth ground such as electr...

Page 5: ...econds Press again Removes display Temporarily displays receiving channel when in Closed Caption mode Front Panel CHANNEL UP DOWN Selectsnext higherchannel Selectsnext lowerchannel VOLUME UP DOWN Increases sound Decreases sound Basic Remote Control Functions POWER Press On Press again Off REMOTE KEYPAD Accesses any channel from keypad RETURN Returns to previous channel VOLUME UP DOWN Increases sou...

Page 6: ... voltmeter reads 21 4 1 5 V 5 Apply external 27 9V DC at TP653 by using an external DC supply TV must be shut off 6 To reset the protector unplug the AC cord and make a short circuit between TP651 and TP652 Now make sure that normal picture appears on the screen 7 If the operation of the horizontal oscillator does not stop in step 5 the circuit must be repaired before the set is returned to the cu...

Page 7: ...to ensure customer controls are in their proper reset position 2 Service item selection Once in the service mode press the Ch up or Ch down button on the remote controller or at the set The service adjustment item will vary in increments of one Select the item you wish to adjust 3 Data number selection Press the Vol up or down button to adjust the data number To enter the service mode and exit ser...

Page 8: ...COR WHITE POINT ADJ MODE W P RED OFFSET HIGH OFFSET BLUE TONE DRI R HI W P GREEN OFFSET HIGH OFFSET BLUE TONE DRI G HI W P BLUE OFFSET HIGH OFFSET BLUE TONE DRI B HI W P RED MH STD DRI R MH W P GREEN MH STD DRI G MH W P BLUE MH STD DRI B MH W P RED OFFSET ML OFFSET RED TONE DRI R ML W P GREEN OFFSET ML OFFSET RED TONE DRI G ML W P BLUE OFFSET ML OFFSET RED TONE DRI B ML W P RED OFFSET LOW DRI R LO...

Page 9: ...WITCH OFF OSO AUTO COLOUR LIMIT ACL FORCED COLOUR ON FCO VIDEO MUTE AT IDENT LOSS VMI VIDEO MUTE AT PROGRAM SOURCE CHANGE VMC HOTEL MODE HTL GAIN FM DEMODULATOR BTSC CHARGE PUMP CP FM WINDOW SELECTION FMWS SOUND MUTE BIT 0 SM0 SOUND MUTE BIT 1 SM1 IF AGC SPEED BIT 0 AGC0 IF AGC SPEED BIT 1 AGC1 PHI 1 TIME CONSTANT FOR FE FOA FE PHI 1 TIME CONSTANT FOR FE FOB FE PHI 1 TIME CONSTANT FOR AV FOA AV PH...

Page 10: ... MAX HOTEL VOLUME 0 63 32 FIX HTL PRG HOTEL PROGRAM NO 0 125 or 125 for none 255 FIX BB CON BLUE BACK CONTRAST 0 15 10 FIX must be 5 RGB OSD GRB REFERENCE 0 15 15 FIX must be 5 CUT R BLACK LEVEL OFFSET R 0 63 32 ADJ CUT G BLACK LEVEL OFFSET G 0 63 32 ADJ CDL CATHODE DRIVE LEVEL 0 15 0 FIX must be 4 DL TV Y D TIME TV YD 0 15 12 FIX must be 2 DL AV Y D TIME AV YD 0 15 12 FIX must be 8 INIT INITIAL D...

Page 11: ... 0 disable or1 enable 0 FIX FAO FIXED AUDIO OUT 0 disable or1 enable 0 FIX VIEW TM VIEW TIMER 0 disable or1 enable 1 FIX must be 1 FRENCH FRENCH LANGUAGE 0 disable or1 enable 0 FIX must be 1 EZ SETUP EZ SETUP AUTOPRESET 0 AUTOPRESET or 1 FIX must be 0 1 EZ SETUP W TEMP WHITE TEMP OR FAVORITE COLOR 0 FC or 1 WT 0 FIX AV AV ENABLED OR DISABLED 0 without ext source or 0 FIX must be 1 1 with external ...

Page 12: ...the picture is centered 1 Call the V AMP mode 2 Increase or decrease V AMP by Volume key to set overscan of 10 0 typical Adjustment Spec 10 0 range 1 FIXED DATA NO NEED TO ADJUST 1 Call the H CENT mode 2 Increase or decrease H CENT by Volume key to center the picture horizontal 1 2 3 4 5 Focus adjustment 1 Receive the Monoscope Pattern signal 2 Press R C to set Picture NORMAL condition 3 Adjust th...

Page 13: ... line 1 2 and 3 and finally line 5 will be the brighter than line 4 2 1 2 3 are in same black level WHITE BAL ANCE SERV ICE MODE ADJ I2C BUS CONTROL 3 11 600 K X 0 273 Y 0 280 MINOLTA COLOUR ANALYZER CA 100 NOTE Above DATA can be UP DOWN by volume key LOW HIGH 20 1 8cd m2 115cd m2 11 600 K DRI GW DRI GS DATA 5 DRI BW DRI BS DATA 5 1 Receive the Monoscope Pattern signal 2 Press R C to set Picture N...

Page 14: ...color bar signal the tint setting adjusted for proper color The wave shapes at the red green and blue cathodes of the picture tube depend on the tint color level and picture control 2 indicates waveform check points See chart waveforms are measured from point indicated to chassis ground å AND SHADED COMPONENTS SAFETY RELATED PARTS MARK X RAY RELATED PARTS This circuit diagram is a standard one pri...

Page 15: ...14 6 5 4 3 2 1 A B C D E F G H BLOCK DIAGRAM 1 20AR33 ...

Page 16: ...15 6 5 4 3 2 1 A B C D E F G H SCHEMATIC DIAGRAM CRT Unit 20AR33 ...

Page 17: ...16 A B C D E F G H MODEL 20AR33 BLOCK DIAGRAM 2 20AR33 ...

Page 18: ...17 20AR33 ...

Page 19: ...18 20AR33 ...

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Page 21: ...20AR33 20 ...

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Page 23: ...22 6 5 4 3 2 1 A B C D E F G H MODEL 20AR33 CHASSIS LAYOUT 20AR33 ...

Page 24: ...23 6 5 4 3 2 1 A B C D E F G H PWB A MAIN Unit Wiring Side PRINTEDWIRING BOARD ASSEMBLIES 20AR33 ...

Page 25: ...24 6 5 4 3 2 1 A B C D E F G H PWB A MAIN Unit Chip Parts Side 20AR33 ...

Page 26: ...25 6 5 4 3 2 1 A B C D E F G H PWB B CRT Unit Wiring Side PWB B CRT Unit Chip Parts Side 20AR33 ...

Page 27: ...26 6 5 4 3 2 1 A B C D E F G H PWB E MTS MODULE Unit Chip Parts Side PWB E MTS MODULE Unit Wiring Side 20AR33 ...

Page 28: ...0 VHiKA7808AP 1 IC601 KA7808API AD100641 VHiSTRG5653 1 IC701 STRG5653 AD100722 RH iX3564CEN3 IC801 IX3564CE AD100639 VHiBR24C02F1E IC1003 BR24C02F W AD100655 VS2SC2735 1E Q201 2SC2735 AD100310 VS2SD601AR 1 Q253 2SD601A AD100310 VS2SD601AR 1 Q254 2SD601A AD100598 VS2SD601A 1 Q320 2SD601A AD100598 VS2SD601A 1 Q401 2SD601A AD100596 VS2SC3207 1 Q601 2SC3207 AD100597 VS2SD2586 1E Q602 2SD2586 AD100595 ...

Page 29: ...1 VCKYCY1HB102K C411 1000p 50V Ceramic AD100494 VCKYPA1HB102K C501 1000p 50V Ceramic AD100482 VCKYCY1HB103K C504 0 01 50V Ceramic AD100462 VCEA0A1HW107M C505 100 50V EL AD100482 VCKYCY1HB103K C507 0 01 50V Ceramic AD100475 VCFYSA1JB224J C508 0 22 63V Mylar AD100458 VCEA0A1CW477M C509 470 16V EL AD100496 VCKYPA2HB102K C510 1000p 500V Ceramic AD100476 VCFYSA1JB473J C514 0 047 63V Mylar AD100481 VCKY...

Page 30: ... AD100552 VRS CY1JF000J RJ71 00 1 16W M Ox AD100552 VRS CY1JF000J RJ73 00 1 16W M Ox AD100552 VRS CY1JF000J RJ75 00 1 16W M Ox AD100552 VRS CY1JF000J RJ76 00 1 16W M Ox AD100552 VRS CY1JF000J RJ77 00 1 16W M Ox AD100552 VRS CY1JF101J R201 00 1 16W M Ox AD100552 VRS CY1JF101J R202 00 1 16W M Ox AD100580 VRS CY1JF680J R205 00 1 16W M Ox AD100558 VRS CY1JF122J R206 00 1 16W M Ox AD100563 VRS CY1JF221...

Page 31: ...802 220 1 16W M Ox AD100563 VRS CY1JF221J R803 220 1 16W M Ox AD100563 VRS CY1JF221J R804 220 1 16W M Ox AD100583 VRS CY1JF822J R805 8 2k 1 16W M Ox Toshiba Part No Part No Ref No Description Toshiba Part No Part No Ref No Description 20AR33 AD100559 VRS CY1JF123J R806 12k 1 16W M Ox AD100555 VRS CY1JF103J R807 10k 1 16W M Ox AD100563 VRS CY1JF221J R808 220 1 16W M Ox AD100522 VRD RA2BE224J R809 2...

Page 32: ...SS119 1 D881 Diode AD100504 VHD1SS119 1 D882 Diode AD100504 VHD1SS119 1 D883 Diode AD100504 VHD1SS119 1 D884 Diode AD100504 VHD1SS119 1 D885 Diode AD100446 VCCSCY1HL471J C871 470p 50V Ceramic AD100446 VCCSCY1HL471J C872 470p 50V Ceramic AD100446 VCCSCY1HL471J C873 470p 50V Ceramic AD100496 VCKYPA2HB102K C875 1000p 500V Ceramic AD100402 RC KZ0150CEZZ C876 1000p 3kV Ceramic AD100467 VCEA0A2EW106M C8...

Page 33: ...VCEA0A1CW106M C3031 10 16V EL AD100452 VCEA0A1CW106M C3032 10 16V EL AD100491 VCKYCY1HF103Z C3033 0 01 50V Ceramic AD100463 VCEA0A1HW224M C3034 0 22 50V EL AD100455 VCEA0A1CW227M C3039 220 16V EL AD100519 VRD RA2BE221J R3001 220 1 8W Carbon AD100519 VRD RA2BE221J R3002 220 1 8W Carbon AD100557 VRS CY1JF105J R3003 1 0M 1 16W M Ox AD100556 VRS CY1JF104J R3004 100k 1 16W M Ox AD100579 VRS CY1JF623J R...

Page 34: ... TLABM0109GJZZ Model Label AD100601 XTASD40P20000 Screw AD100375 QPLGA0017CEZZ AC Plug Adapter AD100430 RRMCG1589CESA Infrared R C Unit AD100812 TINS A762WJZZ Operation Manual MISCELLANEOUS PARTS SUPPLIED ACCESORRIES CABINET PARTS PACKING PARTS NOT REPLACEMANT ITEM Toshiba Part No Part No Ref No Description Toshiba Part No Part No Ref No Description 33 20AR33 AD100815 SPAKCA904WJZZ Packing Case AD...

Page 35: ...REAR Use 12 staples fix the packing case Use tape to fix top side of pack case Packing Case FRONT Buffer Material Wrapping Paper Polyethylene Bag Operation Manual Infrared R C Unit Batteries MARK Not Replacement Items 20AR33 ...

Page 36: ...TOSHIBA CORPORATION 1 1 SHIBAURA 1 CHOME MINATO KU TOKYO 105 8001 JAPAN ...