Toshiba 20AR21 Service Manual Download Page 22 | Manualshive

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MODEL 20AR31 SCHEMATIC DIAGRAM: MAIN Unit

(DUNTKA541WEA8)

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Summary of Contents for 20AR21

Page 1: ...TOSHIBA FILE NO 050 200118 SERVICE MANUAL COLOR TELEVISION 20AR21 20AR31 DOCUMENT CREATED IN JAPAN OCT 2001 AUT OVOLT AGE MT S ST EREO AUT OVOLT AGE ...

Page 2: ...0 60 Hz POWER RATING 20AR21 72 W 20AR31 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 20AR21 1 5 1 5 W at 10 distortion 20AR31 3 0 3 0 W at 10 distortion ELECTRICA...

Page 3: ...e does not 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...

Page 4: ...etworks mechanical 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 suc...

Page 5: ...play 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 sound Decreases sound In menu mod...

Page 6: ...re that the 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 returne...

Page 7: ...ment menu 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 an...

Page 8: ...RECTION S 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 LO...

Page 9: ...OVERSCAN SWITCH 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...

Page 10: ...2 FIX must be 27 HTL VOL 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 6 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 ...

Page 11: ...EAKER SPEAKER ON OFF 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 EZ SETUP EZ SETUP AUTOPRESET 0 AUTOPRESET or 1 FIX 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 1 with external source AV2...

Page 12: ...e key till 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 ...

Page 13: ...ighter than 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 se...

Page 14: ...13 6 5 4 3 2 1 A B C D E F G H 20AR21 20AR31 MODEL 20AR21 CHASSIS LAYOUT ...

Page 15: ...14 6 5 4 3 2 1 A B C D E F G H 20AR21 20AR31 MODEL 20AR31 CHASSIS LAYOUT ...

Page 16: ...15 6 5 4 3 2 1 A B C D E F G H 20AR21 20AR31 BLOCK DIAGRAM 1 ...

Page 17: ...17 20AR21 20AR31 16 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H MODEL 20AR21 BLOCK DIAGRAM 2 ...

Page 18: ...19 20AR21 20AR31 18 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H MODEL 20AR31 BLOCK DIAGRAM 2 ...

Page 19: ...tandard gated 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 st...

Page 20: ...21 6 5 4 3 2 1 A B C D E F G H 20AR21 20AR31 SCHEMATIC DIAGRAM CRT Unit DUNTKA542WEA3 ...

Page 21: ...23 20AR21 20AR31 22 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H MODEL 20AR21 SCHEMATIC DIAGRAM MAIN Unit DUNTKA541WEA7 ...

Page 22: ...25 20AR21 20AR31 24 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H MODEL 20AR31 SCHEMATIC DIAGRAM MAIN Unit DUNTKA541WEA8 ...

Page 23: ...27 20AR21 20AR31 26 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H MODEL 20AR31 SCHEMATIC DIAGRAM MTS MODULE Unit ...

Page 24: ...28 6 5 4 3 2 1 A B C D E F G H 20AR21 PWB A MAIN Unit Wiring Side PRINTEDWIRING BOARD ASSEMBLIES 20AR31 ...

Page 25: ...29 6 5 4 3 2 1 A B C D E F G H 20AR21 20AR31 PWB A MAIN Unit Chip Parts Side ...

Page 26: ...30 6 5 4 3 2 1 A B C D E F G H 20AR21 20AR31 PWB B CRT Unit Wiring Side PWB B CRT Unit Chip Parts Side ...

Page 27: ...31 6 5 4 3 2 1 A B C D E F G H 20AR21 20AR31 PWB E MTS MODULE Unit Chip Parts Side PWB E MTS MODULE Unit Wiring Side ...

Page 28: ... KA7808API å AD100641 VHiSTRG5653 1 IC701 STRG5653 AD100664 RH iX3564CEN1 IC801 IX3564CE AD100639 VHiBR24C02F1E IC1003 BR24C02F W TRANSISTORS AD100655 VS2SC2735 1E Q201 2SC2735 AD100598 VS2SD601A 1 Q253 2SD601A AD100598 VS2SD601A 1 Q254 2SD601A AD100598 VS2SD601A 1 Q304 2SD601A 20AR21 AD100598 VS2SD601A 1 Q320 2SD601A 20AR31 AD100598 VS2SD601A 1 Q321 2SD601A 20AR21 AD100598 VS2SD601A 1 Q401 2SD601...

Page 29: ...3 1000 16V EL 20AR21 å AD100391 RC EZ1086CEZZ C333 1000 16V EL 20AR31 AD100488 VCKYCY1HB472K C356 4700p 50V Ceramic 20AR21 AD100452 VCEA0A1CW106M C359 10 16V EL AD100464 VCEA0A1HW225M C360 2 2 50V EL 20AR21 AD100480 VCKYCY1EF104Z C409 0 1 25V Ceramic AD100480 VCKYCY1EF104Z C410 0 1 25V Ceramic AD100481 VCKYCY1HB102K C411 1000p 50V Ceramic AD100494 VCKYPA1HB102K C501 1000p 50V Ceramic AD100482 VCKY...

Page 30: ...F000J 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 100 1 16W M Ox AD100552 VRS CY1JF101J R202 100 1 16W M Ox AD100580 VRS CY1JF680J R205 68 1 16W M Ox AD100558 VRS CY1JF122J R206 1 2k 1 16W M Ox AD100563 VRS CY1JF221J R207 220 1 16W M Ox AD100558 VRS CY1JF122J R208 1 2k 1...

Page 31: ... Ox AD100563 VRS CY1JF221J R801 220 1 16W M Ox AD100563 VRS CY1JF221J R802 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 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 220k 1 8W Carbon AD1005...

Page 32: ... TX0124BM AD100426 RH TX0124BMZZ Q887 TX0124BM DIODES AD100504 VHD1SS119 1 D881 Diode AD100504 VHD1SS119 1 D882 Diode AD100504 VHD1SS119 1 D883 Diode AD100504 VHD1SS119 1 D884 Diode AD100504 VHD1SS119 1 D885 Diode CAPACITORS EL Electrolytic AD100446 VCCSCY1HL471J C871 470p 50V Ceramic AD100446 VCCSCY1HL471J C872 470p 50V Ceramic AD100446 VCCSCY1HL471J C873 470p 50V Ceramic AD100496 VCKYPA2HB102K C...

Page 33: ...00452 VCEA0A1CW106M C3019 10 16V EL AD100452 VCEA0A1CW106M C3020 10 16V EL AD100452 VCEA0A1CW106M C3021 10 16V EL AD100452 VCEA0A1CW106M C3022 10 16V EL AD100452 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 RESISTORS M Ox Metal Oxide AD100519 VRD RA...

Page 34: ...59 QACCZ3008PEZZ ACC701 AC Cord AD100600 VSP9050PB40YA SP301 Speaker R 20AR21 AD100600 VSP9050PB40YA SP302 Speaker L 20AR21 AD100599 VSP9050PB394A SP301 Speaker R 20AR31 AD100599 VSP9050PB394A SP302 Speaker L 20AR31 AD100331 LHLDK0012PEZZ AC Cord Holder AD100334 LHLDW1003PEZZ Holder AD100335 LHLDW1009PEZZ Holder AD100336 LHLDW1033PEZZ Holder AD100337 LHLDW1060CEZZ Holder AD100339 LHLDW1104PEZZ Hol...

Page 35: ...F THE SET 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 ...

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

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