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Toshiba 21ARF46 Service Manual

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FILE NO. ###-2006##

SERVICE MANUAL

COLOR TELEVISION
21ARF46
DOCUMENT CREATED IN JAPAN, Feb., 2006

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Summary of Contents for Toshiba 21ARF46

  • Page 1: Service Manual

    FILE NO. ###-2006## SERVICE MANUAL COLOR TELEVISION 21ARF46 DOCUMENT CREATED IN JAPAN, Feb., 2006...

  • Page 2: Table Of Contents

    21ARF46 SERVICE MANUAL COLOR TELEVISION Chassis No. GA-4 (1W) 21ARF46 MODELS In the interests of user-safety (Required by safety regulations in some countries ) the set should be restored to its original condition and only parts identical to those specified should be used.

  • Page 3: Important Service Safety Precaution

    21ARF46 IMPORTANT SERVICE SAFETY PRECAUTION Ë Service work should be performed only by qualified service technicians who are thoroughly familiar with all safety checks and the servicing guidelines which follow: WARNING X-RADIATION AND HIGH VOLTAGE LIMITS 1. For continued safety, no modification of any circuit 1.

  • Page 4: Safety Notice

    21ARF46 IMPORTANT SERVICE SAFETY PRECAUTION (Continued) BEFORE RETURNING THE RECEIVER • Connect the resistor connection to all exposed metal parts having a return to the chassis (antenna, metal (Fire & Shock Hazard) cabinet, screw heads, knobs and control shafts, escutcheon, etc.) and measure the AC voltage drop Before returning the receiver to the user, perform across the resistor.

  • Page 5: Location Of User's Control

    21ARF46 LOCATION OF USER'S CONTROL Front Panel POWER Press → On. Press again → Off. CHANNEL UP/DOWN (=) Selects next higher channel. ON TIMER indicator. (>) Selects next lower channel. SENSOR AREA FOR —— VOLUME UP/DOWN REMOTE CONTROL (=) Increases sound.

  • Page 6: Installation And Service Instructions

    21ARF46 INSTALLATION AND SERVICE INSTRUCTIONS Note: (1) When performing any adjustments to resistor controls and transformers use non-metallic screwdrivers or TV alignment tools. (2) Before performing adjustments, the TV set must be on at least 15 minutes. HIGH VOLTAGE CHECK...

  • Page 7: Service Mode

    21ARF46 SERVICE MODE Service Mode Overview 1. Service mode is entered by SERVICE key input or CH-UP +VOL-DOWN input during reset. 2. Service mode is cleared by entering SERVICE key or CH-UP +VOL-DOWN key command during service mode. 3. If key input port (SERVICE) input is LOW, then it is in service mode.

  • Page 8: Adjustment Method

    21ARF46 ADJUSTMENT METHOD Adjustment Mode Items Caution: to get into the service mode, one of the ways is press direct key for service items. the other ways is short the main chassis JA309 and JA402 There is three stage of Service Mode data...

  • Page 9: Self Adjustment

    21ARF46 Ë SELF ADJUSTMENT H-VCO 1. When there is H-VCO self-adjustment key input for adjustment item H-VCO, self-adjustment is performed. 2. H-FREE(1chip) is set to 1. 3. H-OUT is set by intelligent monitor output. 4. IM input is set as TIM input.
  • Page 10 21ARF46 Setting Mode Items Second Stage Item Name Register Range Default VideoTone-Gain (TV) 1chip V-TONE 0 / 1 VideoTone-Gain (AV) 1chip V-TONE 0 / 1 VideoTone-Gain(YUV) 1chip V-TONE 0 / 1 ABCL 1chip ABCL 0 / 1 1chip BS-OFF 0 / 1...
  • Page 11 21ARF46 Option Mode Items Third Stage ITEM DEFAULT DEM0 Without DEMO With DEMO O02 DOWNLOAD Without V-CHIP OP With V-CHIP OP O03 V-CHIP Without V-CHIP With V-CHIP O04 SPEAKER Without SPEAKER With SPEAKER O05 FAO Without FAO With FAO O06 P.PREF Without P.PREF...

  • Page 12: Chassis Layout

    21ARF46 MODEL 21ARF45 CHASSIS LAYOUT...

  • Page 13: Block Diagram

    21ARF46 MODEL 21ARF46 BLOCK DIAGRAM: MAIN Unit...
  • Page 14 21ARF46...
  • Page 15 21ARF46 MODEL 21ARF46 BLOCK DIAGRAM: MTS MODULE Unit...
  • Page 16 21ARF46...
  • Page 17 21ARF46 MODEL 21ARF46 BLOCK DIAGRAM: CRT Unit...

  • Page 18: Description Of Schematic Diagram

    21ARF46 DESCRIPTION OF SCHEMATIC DIAGRAM WAVEFORM MEASUREMENT CONDITIONS: NOTES: 1. Photographs taken on a standard gated color bar 1. The unit of resistance "ohm" is omitted. signal, the tint setting adjusted for proper color. The (K=k =1000 , M=M Ω...

  • Page 19: Waveforms

    21ARF46 WAVEFORMS 1 1.024 Vp-p 2 5.69 Vp-p 3 5.69 Vp-p 4 5.84 Vp-p 5 2.00 Vp-p 6 2.08 Vp-p Horiz.Rate Horiz.Rate Horiz.Rate Horiz.Rate Vert.Rate Vert.Rate 7 6.56 Vp-p 8 6.40 Vp-p 9 4.88 Vp-p 0 158 Vp-p q 1140 Vp-p w 48 Vp-p Horiz.Rate...

  • Page 20: Schematic Diagrams

    21ARF46 SCHEMATIC DIAGRAM: CRT Unit...
  • Page 21 21ARF46 SCHEMATIC DIAGRAM: MAIN-1 Unit...
  • Page 22 21ARF46...
  • Page 23 21ARF46 SCHEMATIC DIAGRAM: MTS Unit...

  • Page 24: Printed Wiring Board Assemblies

    21ARF46 PRINTED WIRING BOARD ASSEMBLIES PWB-A: MAIN Unit (Wiring Side)
  • Page 25 21ARF46 R1 0 2 7 RJ 1 6 R1 0 2 4 C1 0 1 6 R3 8 3 R1 0 0 3 R1 0 0 2 R1 0 0 7 F DC1 R1 0 8 3 Q1 0 7 2...
  • Page 26 21ARF46 PWB-B: CRT Unit (Wiring Side)
  • Page 27 21ARF46 PWB-C: MTS Unit (Wiring Side) R3 0 0 4 R3 0 0 3 C3 0 0 2 Q3 0 0 4 R3 0 0 5 R3 0 3 5 Q3 0 0 1 R3 0 2 9 R3 0 3 4...

  • Page 28: Replacement Parts List

    21ARF46 Ref.No. Part No. Description Toshiba Part No. PARTS LIST PWB-A: DUNTKC522WEA8 MAIN UNIT PARTS REPLACEMENT TUNER NOTE:THE PARTS HERE SHOWN ARE SUPPLIED AS AN Replacement parts which have these special safety characteristics identified in this manual; electrical components having such features...

  • Page 29: Main Unit

    21ARF46 Ref.No. Part No. Description Toshiba Part No. Ref.No. Part No. Description Toshiba Part No. C438 VCEA0A1CW106M+ X 10 AD500261 PWB-A: DUNTKA541WEO2 C439 VCKYCY1HF103ZY X 0.01 Ceramic AD500304 C452 VCE9GA1CW106M+ X 10 AD500533 MAIN UNIT C505 VCEA0A1HW107M+ X 100 AD500271 C508 VCFYAA2AA224J+ X 0.22...
  • Page 30 21ARF46 Ref.No. Part No. Description Toshiba Part No. Ref.No. Part No. Description Toshiba Part No. R208 VRS-CY1JF331JY X 330 1/16W M-Ox. AD100268 PWB-A: DUNTKA541WEO2 R209 VRS-CY1JF392JY X 3.9k 1/16W M-Ox. AD500404 R216 VRS-RG3LB333J+ X 33k 3.0W M-Ox. AD500612 MAIN UNIT...
  • Page 31 21ARF46 Ref.No. Part No. Description Toshiba Part No. Ref.No. Part No. Description Toshiba Part No. R1040 VRS-CY1JF273JY X 27k 1/16W M-Ox. AD500397 PWB-A: DUNTKA541WEO2 R1041 VRS-CY1JF103JY X 10k 1/16W M-Ox. AD500385 R1042 VRD-RA2BE101JY X 100 1/8W Carbon AD500335 MAIN UNIT...

  • Page 32: Crt Unit

    21ARF46 Ref.No. Part No. Description Toshiba Part No. Ref.No. Part No. Description Toshiba Part No. PWB-A: DUNTKA541WEO2 PWB-E: DUNTKC574WEA0 MAIN UNIT MTS UNIT INTEGRATED CIRCUITS MISCELLANEOUS PARTS IC3001 VHICXA2194Q-1Y X CXA2194Q AD500576 P1001 QPLGN0561CEZZA X plug 5Pin(KA) AD500488 TRANSISTORS P1002...

  • Page 33: Packing Parts

    21ARF46 Ref.No. Part No. Description Toshiba Part No. Ref.No. Part No. Description Toshiba Part No. PACKING PARTS PWB-E: DUNTKC574WEA0 (NOT REPLACEMENT ITEM) MTS UNIT RESISTORS SPAKCC641WJZZ X Packing Case AD500719 [M-Ox.··· Metal Oxide, M-Film ··· Metal Film] SPAKP0109GJZZ X Lamifoam...

  • Page 34: Packing Of The Set

    21ARF46 PACKING OF THE SET...
  • Page 35 21ARF46...
  • Page 36 HEAD OFFICE / 82 TOTOWA ROAD, WAYNE, NEW JERSEY 07470 TEL: (973) 628-8000 LATIN AMERICA DIVISION 1900 NORTH WEST 84TH AVENUE, MIAMI, FLORIDA 33126 TEL: (305) 470-9355 TOSHIBA DE MEXICO, S.A. DE C.V. SIERRA CANDELA NO. 111 6-PISO COL. LOMAS DE CHAPULTEPEC 11000 MEXICO, D.F. TEL: (5) 202-26-77...
  • Page 37 TOSHIBA CORPORATION 1-1, SHIBAURA 1-CHOME, MINATO-KU, TOKYO 105-8001, JAPAN...

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