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Toshiba 27A60 Service Manual

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27A60
Televisión a color
Tabla de contenidos
Capítulo 1: Ajustes generales
Ins trucciones de seguridad
Ajus tes iniciales
Modo de ser vicio
Modo de dise ño
Ajus tes eléctricos
R evisión de circuitos
Capítulo 2: Información específica.
F ijación y ajuste de datos
Localizaci ón de controles
Pr ogramando la memoria de canales
Diag rama a bloques del circuito
R eemplazo del gabinete y del chasis
V ista inferior de las placas de circuito impreso
V ista de terminales de transistores
Especificaciones
Diagrama esquemático
Segur idad
Pr incipal
Ex citador CRT

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Table of Contents
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  Summary of Contents for Toshiba 27A60

  • Page 1 Televisión a color Tabla de contenidos Capítulo 1: Ajustes generales Ins trucciones de seguridad 27A60 Ajus tes iniciales Modo de ser vicio Modo de dise ño Ajus tes eléctricos R evisión de circuitos Capítulo 2: Información específica. F ijación y ajuste de datos Localizaci ón de controles...
  • Page 2: Service Manual

    FILE NO. 020-200016 SERVICE MANUAL COLOR TELEVISION N0S Chassis 27A60 , 32A60 , 36A60 (TAC0020) (TAC0021) (TAC0022) PUBLISHED IN JAPAN, Jun., 2000 So...
  • Page 3: 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 4: 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 5: 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 6 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 7 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 8 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 9: 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 10 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 11 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 12: 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 13: 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 14 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 15 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 16 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 17: 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 18: 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 19: 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 20 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 21: 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 22: Circuit Block Diagram

    – 21 –...
  • Page 23: Chassis And Cabinet Replacement Parts List

    • The part number must be used when ordering parts, in order to assist in processing, be sure to include the Model number and Description. • The PC board assembly with mark is no longer available after the end of the production. Model : 27A60, 32A60, 36A60 Capacitors ..... CD Ceramic Disk : Plastic Film : Electrolytic Resistors ....
  • Page 24 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...
  • Page 25 Chip, 0.01?F, +80%, -20% R304 24366623 CF, 62k ohm (36A60) Chip, 0.1?F, ±10%, 25V CZ07 24092178 R305 24322758 MF, 0.75 ohm, 1W (27A60) CZ09 24781220 Chip, 22pF, SL R305 24322688 MF, 0.68 ohm, 1W (32A60) Chip, 10pF, ±0.5pF%, SL CZ10...
  • Page 26 24366102 CF, 1k ohm R328 24366684 CF, 680k ohm (36A60) R493 24366102 CF, 1k ohm R336 24383391 OMF, 390 ohm, 2W (27A60) R494 24366471 CF, 470 ohm R336 24383221 OMF, 220 ohm, 2W R495 24366561 CF, 560 ohm (27A60) (32A60/36A60)
  • Page 27 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) RA62 24366103 CF, 10k ohm R922 24366301 CF, 300 ohm (32A60/36A60) RA67 24366472 CF, 4700 ohm R924 24366820...
  • Page 28 Chip, 820 ohm, 1/16W TLN1098AH RZ17 24872471 Chip, 470 ohm, 1/16W * T461 23236579 Transformer, Flyback, RZ18 24872122 Chip, 1200 ohm, 1/16W TFB4151AD (27A60) RZ19 24872332 Chip, 3300 ohm, 1/16W * T461 23236540 Transformer, Flyback, RZ20 24872101 Chip, 100 ohm, 1/16W TFB4132ED (32A60/36A60)
  • Page 29 Transistor, 2CS2482 FA-1 QV60 23114528 Transistor, 2SC1740S, Q Q403 23314444 Transistor, 2SC4721P QZ01 B0410895 IC, TC90A49P Q404 A6873702 Transistor, 2SD2539 (27A60) QZ02 A6541130 Transistor, 2SA1162-Y Q404 23314955 2SD2553(FA) (32A60/36A60) QZ03 A6541130 Transistor, 2SA1162-Y Q404B 72471082 Screw, BRDT2W3X10 SZN QZ04 A6541130 Transistor, 2SA1162-Y...
  • Page 30 U901 CRT Drive Board, PB8642B F801 23144888 Fuse, 5.0A, 125V (36A60) F801A 23165433 Holder, Fuse U902 Main Board, PB9361C (27A60) F802 23144511 Fuse, 4.0A, 125V U902 Main Board, PB9361A (32A60) G060 24366470 CF, 47 ohm U902 Main Board, PB9361B (36A60)
  • Page 31 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) A411 23540106 Back Cover (27A60) A411 23549930 Back Cover (32A60)
  • Page 32: Pc Boards Bottom View

    MAIN BOARD PB9361 BOTTOM (FOIL) SIDE – 31 – – 32 –...
  • Page 33 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 34: 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 35 MEMO ..........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................– 36 –...
  • Page 36: 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 37 TOSHIBA CORPORATION 1-1, SHIBAURA 1- CHOME, MINATO-KU, TOKYO 105-8001, JAPAN...
  • Page 38: Schematic Diagram

    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 39 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].

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32a6036a60