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Toshiba 21A3E Service Manual

Colour television
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FILE NO. 060-200105
SERVICE MANUAL

COLOUR TELEVISION

S1E Chassis
21A3E , 21A3TR ,
21A3M , 21A3MJ
PRINTED IN JAPAN Jun., 2001 T

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  Summary of Contents for Toshiba 21A3E

  • Page 1: Colour Television

    FILE NO. 060-200105 SERVICE MANUAL COLOUR TELEVISION S1E Chassis 21A3E , 21A3TR , 21A3M , 21A3MJ PRINTED IN JAPAN Jun., 2001 T...
  • Page 2: Table Of Contents

    TABLE OF CONTENTS CHAPTER 1 GENERAL ADJUSTMENTS SAFETY INSTRUCTIONS ............................3 SET-UP ADJUSTMENT ............................4 SERVICE MODE ..............................6 DESIGN MODE ................................ 9 ELECTRICAL ADJUSTMENTS ..........................10 CIRCUIT CHECK ..............................15 CHAPTER 2 SPECIFIC INFORMATIONS SETTING & ADJUSTING DATA ..........................16 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. The only source of X-RAY RADIATION in this TV receiver 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 I 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 I CIRCUMFERENCE CONVERGENCE ADJUSTMENT CONVERGENCE ADJUSTMENTS 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.) I CENTER CONVERGENCE ADJUSTMENT 3.
  • Page 6: Service Mode

    SERVICE MODE 1. ENTERING TO SERVICE MODE 1) Press o button once on 2) Press o button again to 3) While pressing the o button, Remote Control. keep pressing. press MENU button on TV set. Item Data (Service mode display) 2.
  • Page 7 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 16) 5.
  • Page 8 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. Indicated color of mode now selected : Green and Red Indicated color of other modes : White...
  • Page 9: Design Mode

    DESIGN MODE 1. ENTERING TO DESIGN MODE 1) Select the Service mode. 2) While pressing o (or CALL) 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”...
  • Page 10: Electrical Adjustments

    ELECTRICAL ADJUSTMENTS 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 11 ITEM ADJUSTMENT PROCEDURE WHITE BALANCE 1. Set Contrast to 40, and brightness to +20 by picture control. ADJUSTMENT 2. Set the TV in service mode, and get the inside W/B adjusting signal with VIDEO button. • CUTOFF ADJUSTMENT 3. Select RCUT, GCUT and BCUT with CHANNEL s, t buttons, to set individual (RCUT) values to Initial reference data, and to set GDRV and BDRV to Initial reference (GCUT)
  • Page 12 S1E: Series (Reference factory adjustment) 1 SUB COLOUR CONTRAST (SCNT) (Measuring point) Q501 #20 (R-OUT) (Adjusting signal) Sub Bright (NTSC) signal (Adjusting method) 1) Set user control to the standard 1. 2) Change to adjust SCNT data. * It make the point which doesn't have a change and it adjust with screen VR SPEC: 2.5 0.2Vp-p 2 SUB BRIGHT (BRTC) (Adjusting signal)
  • Page 13 5 SUB COLOUR NTSC (COLC) (Measuring point) Q501 #22 (B-OUT) (Adjusting signal) Sub Bright (NTSC) signal (Adjusting method) 1) Set BUS data of Q501 to the same value as that SUB TINT adjustment. 2) Set user control to the standard 1. 3) Change COLC data to adjust the 6th peak amplitude of rainbow color bar Value Adjust the amplitude of color bar (p-p value of the...
  • Page 14 8 SECAM BELL FILTER ADJUSTMENT (Measuring point) (Adjusting signal) NO ADJUSTMENT (Adjusting method) 9 SECAM R-Y ADJUSTMENT (Measuring point) Q501 #20 R-Y OUT (Adjusting signal) Colour bar (SECAM) signal (Adjusting method) Adjust (SRY) the level of the monochrome signal part must be a match to the level of horizontal blanking signal.
  • Page 15: Circuit Check

    CIRCUIT CHECK HIGH VOLTAGE CHECK CAUTION: There is no HIGH VOLTAGE ADJUSTMENT on this chassis. Checking should be done following the steps below. 1. Connect an accurate high voltage meter to the second anode of the picture tube. 2. Turn on the receiver. Set the BRIGHTNESS and CONTRAST controls to minimum (zero beam current). 3.
  • Page 16: Chapter 2 Specific Informations

    CHAPTER 2 SPECIFIC INFORMATIONS SETTING & ADJUSTING DATA SAFETY INSTRUCTIONS 21" HIGH VOLTAGE AT ZERO BEAM: 30.2 kV MAX HIGH VOLTAGE: 32.0 kV AV VOLTAGE 110~240 V Table-1 SERVICE MODE ADJUSTING ITEMS AND DATAS IN THE SERVICE MODE: Item Adjustment Reference data Data RCUT...
  • Page 17: Location Of Controls

    LOCATION OF CONTROLS (Representative: 21A3E) Front Main Power On/Off Head Phone Jack Channel Up Video In Channel Down Audio Input Left MENU Open Audio Input Right Power Ind. Infra-red Sensor Remote mute CALL on-screen on/off Power ON/OFF Direct Select –/--...
  • Page 18: Programming Channel Memory

    PROGRAMMING CHANNEL MEMORY First, use the ASM (Automatic Search Memory) function to preset all the active channels in your area automatically. Then, arrange the preset channels with the SEARCH (>>>), MFT (Manual Fine Tuning) and AFT (Auto Fine Tuning) functions so that you can tune into only desired channels. This section shows how to tune in channels using mainly the Remote Controller.
  • Page 19 Use the SEARCH function if desired channels could not be preset with the ASM, or if you would like to preset the desired channels to specific position numbers one by one. The adjustments below are not necessary under normal conditions. However, in areas of inferior broadcast conditions where adjustment is necessary for a better picutre, adjust the tuning with the MFT (Manual Fine Tuning).
  • Page 20: Circuit Block Diagram

    – 20 –...
  • Page 21: 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 : 21A3E, 21A3TR, 21A3M, 21A3MJ Capacitors ..... CD Ceramic Disk : Plastic Film : Electrolytic Resistors ....
  • Page 22 Location Location Part No. Description Part No. Description – 22 –...
  • Page 23 Location Location Part No. Description Part No. Description – 23 –...
  • Page 24 Location Location Part No. Description Part No. Description – 24 –...
  • Page 25 Location Location Part No. Description Part No. Description – 25 –...
  • Page 26 Location Location Part No. Description Part No. Description – 26 –...
  • Page 27 Location Location Part No. Description Part No. Description – 27 –...
  • Page 28 Location Location Part No. Description Part No. Description – 28 –...
  • Page 29: Pc Boards Bottom View

    MAIN BOARD PD0302 MAIN BOARD PD0303 MAIN BOARD PD0158 BOTTOM (FOIL) SIDE – 29 – – 30 –...
  • Page 30: Terminal View Of Transistors

    CRT-D BOARD PD0157 TERMINAL VIEW OF TRANSISTORS BOTTOM (FOIL) SIDE 2SD2253 2SC3852 2SC752GTM 2SC752 2SA1788 (old) 2SD1763A 2SC2482 2SA562TM 2SC5243 2SC1569 2SA1015 2SC2655 2SC4544 2SC4721P 2SC1815 2SA1788 2SC2878 2SA1306 2SC1740S 2SA1186A 2SC2120 2SA9335 2SD1554 ON4409 RN2203 RN2201 2SD2253 RN2004 2SD1556 RN1203 2SC5143 RN1204...
  • Page 31: Specifications

    SPECIFICATIONS (Representative: 21A3E) Rated voltage AC 110 V – 240 V, 50/60 Hz Power consumption 105 W (Approx.) (at AC 220 V, 50 Hz) Width 630 mm Height 456 mm Depth 485 mm Dimensions 24.0 kg (Approx.) Mass Picture tube...
  • Page 32 TOSHIBA CORPORATION 1-1, SHIBAURA 1-CHOME, MINATO-KU, TOKYO 105-8001, JAPAN...

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