Toshiba TAC0020 Service Manual
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Toshiba TAC0020 Service Manual

Toshiba TAC0020 Service Manual

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FILE NO. 020-200016
SERVICE MANUAL
COLOR TELEVISION
N0S Chassis
27A60 , 32A60 , 36A60
(TAC0020)
(TAC0021)
(TAC0022)
PUBLISHED IN JAPAN, Jun., 2000 So

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Summary of Contents for Toshiba TAC0020

  • Page 1 FILE NO. 020-200016 SERVICE MANUAL COLOR TELEVISION N0S Chassis 27A60 , 32A60 , 36A60 (TAC0020) (TAC0021) (TAC0022) PUBLISHED IN JAPAN, Jun., 2000 So...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS CHAPTER 1 GENERAL ADJUSTMENTS SAFETY INSTRUCTIONS ............................3 SET-UP ADJUSTMENT ............................4 SERVICE MODE ..............................8 DESIGN MODE ..............................11 ELECTRICAL ADJUSTMENT ..........................12 CIRCUIT CHECKS ..............................16 CHAPTER 2 SPECIFIC INFORMATIONS SETTING & ADJUSTING DATA ..........................17 LOCATION OF CONTROLS ...........................

  • Page 3: Chapter 1 General Adjustments

    CHAPTER 1 GENERAL ADJUSTMENTS SAFETY INSTRUCTIONS WARNING: BEFORE SERVICING THIS CHASSIS, READ THE “X-RAY RADIATION PRECAUTION”, “SAFETY PRECAU- TION” AND “PRODUCT SAFETY NOTICE” INSTRUCTIONS BELOW. X-RAY RADIATION PRECAUTION 1. Excessive high voltage can produce potentially hazard- 2. This receiver is equipped with a Fail Safe (FS) circuit which ous X-RAY RADIATION.

  • Page 4: Set-Up Adjustment

    WARNING: BEFORE SERVICING THIS CHASSIS, READ THE “X-RAY RADIATION PRECAUTION”, “SAFETY PRECAU- TION” AND “PRODUCT SAFETY NOTICE” ON PAGE 3 OF THIS MANUAL. SET-UP ADJUSTMENT (FOR 13”, 14”, 19”, 20”) The following adjustments should be made when a complete realignment is required or a new picture tube is installed. Perform the adjustments in order as follows : 1.
  • Page 5 CONVERGENCE ADJUSTMENTS CIRCUMFERENCE CONVERGENCE ADJUSTMENT NOTE: Before attempting any convergence adjustments, the 1. Loosen the clamping screw of deflection yoke slightly to receiver should be operated for at least fifteen min- allow the yoke to tilt. utes. 2. Temporarily put a wedge as shown in figure 1. (Do not remove cover paper on adhesive part of the wedge.) CENTER CONVERGENCE ADJUSTMENT 3.
  • Page 6 WARNING: BEFORE SERVICING THIS CHASSIS, READ THE “X-RAY RADIATION PRECAUTION”, “SAFETY PRECAU- TION” AND “PRODUCT SAFETY NOTICE” ON PAGE 3 OF THIS MANUAL. (FOR 35”, 36”) The following adjustments should be made when a complete realignment is required or a new picture tube is installed. Perform the adjustments in order as follows : 1.
  • Page 7 CONVERGENCE ADJUSTMENTS 4-POLE NOTE: Before attempting any convergence adjustments, MAGNETS the receiver should be operated for at least fifteen 6-POLE minutes. MAGNETS CENTER CONVERGENCE ADJUSTMENT 1. Display built-in cross-dot pattern using the TEST SIG- NAL SELECTION function. 2. Adjust the BRIGHTNESS and CONTRAST Controls for well defined pattern.

  • Page 8: Service Mode

    SERVICE MODE 1. ENTERING TO SERVICE MODE 1) Press MUTE button once 2) Press MUTE button 3) While pressing the MUTE button, on Remote Control. again to keep pressing. press MENU button on TV set. MUTE (Service mode display) 2. DISPLAYING THE ADJUSTMENT MENU 1) Press MENU button on TV.
  • Page 9 4. SELECTING THE ADJUSTING ITEMS 1) Every pressing of CHANNEL s button in the service mode changes the adjustment items in the order of table-2. (t button for reverse order) Refer to table-2 for preset data of adjustment mode. (See SETTING & ADJUSTING DATA on page 17) 5.
  • Page 10 8. SELF DIAGNOSTIC FUNCTION 1) Press “9” button on Remote Control during display of adjustment menu in the service mode. The diagnosis will begin to check if interface among IC’s are executed properly. 2) During diagnosis, the following displays are shown. SELF CHECK NO.

  • Page 11: Design Mode

    DESIGN MODE 1. ENTERING TO DESIGN MODE 1) Select the Service mode. 2) While pressing RECALL button on 3) Press MENU button on TV. Remote and press MENU button on TV. Item Press Data Press (Design mode) (Adjustment mode) When QA02 is initialized, items “OPT0” and “OPT1” of DESIGN MODE are set to the data of the representative model of this chassis family.

  • Page 12: Electrical Adjustment

    ELECTRICAL ADJUSTMENT ITEM ADJUSTMENT PROCEDURE FOCUS VR ADJ 1. Enter the service mode, then select any register item. 2. Press the TV/VIDEO button on the Remote until the black cross-bar pattern ap- pears on the screen. 3. Adjust the FOCUS control (on T461) for well defined scanning lines on the picture screen.
  • Page 13 ITEM ADJUSTMENT PROCEDURE HORIZONTAL POSITION 1. Call up the adjustment mode display, then select the item HPOS or VPOS. (HPOS) 2. Press the TV/VIDEO button on Remote until the VERTICAL POSITION white cross-bar or black cross-bar pattern appears (VPOS) on the screen. 3.
  • Page 14 MTS ADJUSTMENT (FOR N0S CHASSIS) ITEM INPUT SIGNAL ADJUSTMENT PROCEDURE STEREO VCO • No signal 1. Display item STVC, and connect pin 9 of (STVC) H002 to ground. 2. Connect frequency counter to pin 12 of H002. 3. Change data by Volume s/t buttons so that the reading of counter becomes value as close as 4fH (62.936kHz).
  • Page 15 MTS ADJUSTMENT (FOR N0ES CHASSIS) ITEM INPUT SIGNAL ADJUSTMENT PROCEDURE • 1kHz 30% mod. → ANT ATTENUATOR 1. Connect rms meter to pin 34 of QG01. (ATT) terminal 2. Display item ATT on screen. 3. Change data by VOLUME s/t buttons so that the reading of meter becomes value as close as 137mVrms.

  • Page 16: Circuit Checks

    CIRCUIT CHECKS HIGH VOLTAGE CHECK Troubleshooting Guide for Fail Safe Circuit CAUTION: There is no HIGH VOLTAGE ADJUSTMENT on this chassis. Checking should be done following the steps Check that the set returns to normal operation when pin 12 below. of Z801(or emitter of Q472) is grounded with jumper wire.

  • Page 17: Chapter 2 Specific Informations

    CHAPTER 2 SPECIFIC INFORMATIONS SETTING & ADJUSTING DATA SAFETY INSTRUCTIONS 32" 36" 27" HIGH VOLTAGE AT ZERO BEAM: 31.0kV 31.9kV 28.3kV MAX HIGH VOLTAGE: 32.4 kV 33.3kV 29.7kV Table-1 SERVICE MODE ADJUSTING ITEMS AND DATAS IN THE SERVICE MODE: 36" Item Name of adjustment Preset...

  • Page 18: Location Of Controls

    LOCATION OF CONTROLS (Representative: 36A60) Front view Rear view VIDEO/AUDIO terminals Antenna/Cable terminals TV/VIDEO VOLUME T / S CHANNEL t/ s POWER MENU TV/VIDEO VOLUME CHANNEL POWER Remote sensor MENU POWER indicator – 18 –...
  • Page 19 Remote Control MUTE POWER RECALL MUTE RECALL POWER Channel Number CH RTN CH RTN MENU MENU/ CHANNEL s/t ENTER Menu s/t VOLUME T/S Menu T/S TV/CABLE/VCR switch CABLE EXIT Set to “TV” to control the TV. EXIT FAV CH TV/VIDEO TV/VIDEO FAV CH s button TV/VCR...

  • Page 20: Programming Channel Memory

    PROGRAMMING CHANNEL MEMORY The channel memory is the list of TV channel numbers your TV will stop on when you press the CHANNEL s or t button. First, use the TV/CABLE and CH PROGRAM functions to preset all active channels in your area automatically. If necessary, arrange the preset channels with the ADD/ERASE functions so that you can tune into only desired channels.

  • Page 21: Circuit Block Diagram

    – 21 –...

  • Page 22: Chassis And Cabinet Replacement Parts List

    CHASSIS AND CABINET REPLACEMENT PARTS LIST WARNING: BEFORE SERVICING THIS CHASSIS, READ THE “X-RAY RADIATION PRECAUTION”, “SAFETY PRECAUTION” AND “PRODUCT SAFETY NOTICE” ON PAGE 3 OF THIS MANUAL. CAUTION: The international hazard symbols “ ” in the schematic diagram and the parts list designate com- ponents which have special characteristics important for safety and should be replaced only with types identical to those in the original circuit or specified in the parts list.
  • Page 23 Location Location Part No. Description Part No. Description PF, 7200pF, ±3%, 1500V CD, 4700pF, ±20%, AC250V * C444 24082956 C813 24092597 CD, 4700pF, ±20%, AC250V (27A60) C815 24092597 PF, 6200pF, ±3%, 1800V CD, 4700pF, ±20%, AC250V * C444 24082611 C816 24092597 CD, 330pF, ±10%, 2kV (32A60)
  • Page 24 Location Location Part No. Description Part No. Description EL, 10?F, ±20%, 16V CM73 24794100 CZ29 24814103 Chip, 0.01?F, +80%, -20% EL, 10?F, ±20%, 16V CR01 24539104 PF, 0.1?F CZ30 24203100 Chip, 0.1?F, ±10%, 25V CR02 24539104 PF, 0.1?F CZ31 24092178 CR03 24539104 PF, 0.1?F...
  • Page 25 Location Location Part No. Description Part No. Description MF, 5600 ohm, ±1%, 1/4W R313 24366243 CF, 24k ohm (27A60) * R482 24327562 R313 24366104 CF, 100k ohm (32A60/36A60) (27A60) MF, 4700 ohm, ±1%, 1/4W R314 24366105 CF, 1M ohm * R482 24327472 R315 24366824...
  • Page 26 Location Location Part No. Description Part No. Description R920 24000880 FR, 5.1 ohm, 1W (32A60) RA40 24366101 CF, 100 ohm R920 24000961 FR, 2.2 ohm, 2W (36A60) RA41 24366101 CF, 100 ohm R921 24366561 CF, 560 ohm RA61 24366103 CF, 10k ohm R922 24366221 CF, 220 ohm (27A60)
  • Page 27 Location Location Part No. Description Part No. Description RS10 24366682 CF, 6800 ohm * L441 23233072 Coil, Linearity, TLN2115G RS14 24366682 CF, 6800 ohm (27A60) RS16 24366682 CF, 6800 ohm * L441 23233941 Coil, Linearity, TLN2157G RS28 24366472 CF, 4700 ohm (32A60) RS40 24366101...
  • Page 28 Location Location Part No. Description Part No. Description Q301 B0378560 IC, TA8427K QS63 A6342200 Transistor, 2CS2878-A Q301B 72471082 Screw, BRDT2W3X10 SZN QS64 A6342200 Transistor, 2CS2878-A Q360 23114528 Transistor, 2SC1740S, Q QV01 23906364 IC, MM1313BD (36A60) QV02 23904943 IC, MM1111XS Q361 23314445 Transistor, 2SC4721, Q QV14...
  • Page 29 Location Location Part No. Description Part No. Description D885 23118052 Diode, RU4Z LF-L1 KB01 23906805 Remote Sensor, PIC-TB17 D899 24019471 Varistor, TNR10V271K2 P801 23372112 Power Cord D901 23118859 Diode, 1SS133 P900 23164724 Plug, 3P (36A60) D902 23118859 Diode, 1SS133 P910 23164725 Plug, 2P D903...
  • Page 30 Location Location Part No. Description Part No. Description Y101 23563915 Owner’s Manual, English, 27A60/32A60/36A60 Y101F 23563916 Owner’s Manual, French, 27A60/32A60/36A60 CABINET PARTS CABINET PARTS CABINET PARTS CABINET PARTS CABINET PARTS A201 23549714 Front Cover (27A60) A201 23549928 Front Cover (32A60) A201 23510497 Front Cover (36A60)

  • Page 31: Pc Boards Bottom View

    MAIN BOARD PB9361 BOTTOM (FOIL) SIDE – 31 – – 32 –...
  • Page 32 PIP/TIF DRIVE BOARD PB9362 CRT DRIVE BOARD PB8642 BOTTOM (FOIL) SIDE BOTTOM (FOIL) SIDE V-CHIP BOARD PB8688 BOTTOM (FOIL) SIDE – 33 – – 34 –...

  • Page 33: Terminal View Of Transistors

    TERMINAL VIEW OF TRANSISTORS 2SD2253 2SC3852 2SC752GTM 2SC752 2SA1788 (old) 2SD1763A 2SA562TM 2SC2482 2SC5243 2SC1569 2SA1015 2SC2655 2SC4544 2SC4721P 2SC1815 2SA1788 2SC2878 2SA1306 2SC1740S 2SA1186A 2SC2120 2SA9335 2SD1554 ON4409 RN2203 RN2201 2SD2253 RN2004 2SD1556 RN1203 2SD2553 RN1204 2SC5143 RN2204 RN1205 RN1202 RN1201 –...
  • Page 34 MEMO ..........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................– 36 –...

  • Page 35: Specifications

    SPECIFICATIONS (Representative : 36A60) TELEVISION SYSTEM NTSC standard CHANNEL COVERAGE VHF: 2 through 13 UHF: 14 through 69 Cable TV: mid band (A-8 through A-1, A through I) super band (J through W) hyper band (AA through ZZ, AAA, BBB) ultra band (65 through 94, 100 through 125) POWER SOURCE 120V AC, 60Hz...
  • Page 36 TOSHIBA CORPORATION 1-1, SHIBAURA 1- CHOME, MINATO-KU, TOKYO 105-8001, JAPAN...
  • Page 37 SCHEMATIC DIAGRAM MODEL : 27A60 Chassis No. TAC0020 32A60 Chassis No. TAC0021 36A60 Chassis No. TAC0022 WARNING: BEFORE SERVICING THIS CHASSIS, READ THE "X-RAY RADIATION PRECAUTION", "SAFETY PRECAUTION" AND "PRODUCT SAFETY NOTICE" ON THE MANUAL FOR THIS MODEL. CAUTION: The international hazard symbols "*" in the schematic diagram and the parts list designate components which have special characteristics important for safety and should be replaced only with types identical to those in the original circuit or specified in the parts list.
  • Page 38 SCHEMATIC DIAGRAM MODEL : 27A60 Chassis No. TAC0020 32A60 Chassis No. TAC0021 36A60 Chassis No. TAC0022 NOTE: WARNING: BEFORE SERVICING THIS CHASSIS, READ THE "X-RAY RADIATION PRECAUTION", "SAFETY PRECAUTION" AND "PRODUCT SAFETY NOTICE" ON THE MANUAL FOR THIS MODEL. 1. RESISTOR Resistance is shown in ohm [K = 1.000, M = 1.000.000].

This manual is also suitable for:

32a6036a6027a60Tac0021Tac0022

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