Toshiba 36A50 Service Manual
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Toshiba 36A50 Service Manual

Toshiba 36A50 Service Manual

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SERVICE MANUAL
COLOR TELEVISION
36A40 is the same as 36A50 except for the parts tabled on back of this sheet.
Use this service manual together with the service manual of 36A50 (File No. 020-200005).
– SUMMARY –
FILE NO. 023-200011
N0ES Chassis
36A40
(TAC0011)
PUBLISHED IN JAPAN, May., 2000 S

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Summary of Contents for Toshiba 36A50

  • Page 1 (TAC0011) – SUMMARY – 36A40 is the same as 36A50 except for the parts tabled on back of this sheet. Use this service manual together with the service manual of 36A50 (File No. 020-200005). PUBLISHED IN JAPAN, May., 2000 S...
  • Page 2 R508 24366102 CF, 1k ohm R509 24366102 CF, 1k ohm R510 24366471 CF, 470 ohm U902 Main Board, PB9399B Y101 23563899 Owner’s Manual, English, 36A40 Y101F 23563900 Owner’s Manual, French, 36A40 TOSHIBA CORPORATION 1-1, SHIBAURA 1-CHOME, MINATO-KU, TOKYO 105-8001, JAPAN...
  • Page 3 FILE NO. 020-200005 SERVICE MANUAL COLOR TELEVISION N0ES Chassis 36A50 (TAC0010) PRINTED IN U.S.A. Apr., 2000 U...

  • Page 4: Table Of Contents

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

  • Page 5: 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 6: 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 7 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 8 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 9 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 10: Service Mode

    SERVICE MODE 1. ENTERING TO SERVICE MODE 1) Press MUTE button once 2) Press MUTE button again 3) While pressing the MUTE button, on Remote Control. 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 11 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 12 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 13: Design Mode

    DESIGN MODE 1. ENTERING TO DESIGN MODE 1) Select the Service mode. 2) While pressing RECALL button on Re- 3) Press MENU button on TV. mote and press MENU button on TV. ITEM Press DATA Press (Design mode) (Adjustment mode) When QA02 is initialized, items “OPT0”...

  • Page 14: 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 15 ITEM ADJUSTMENT PROCEDURE E-W PARABOLA 1. Call up the adjustment mode display, then select the Item DPC. (DPC) 2. Press the TV/VIDEO button on Remote until the cross-hatch pattern appears on the screen. 3. Press the VOLUME s or t button to make vertical lines straight as shown below. HORIZONTAL POSITION 1.
  • Page 16 MTS ADJUSTMENT (FOR N7S CHASSIS) ITEM INPUT SIGNAL ADJUSTMENT PROCEDURE • 1kHz 30% mod. → ANT ATTENUATOR 1. Connect rms meter to pin 12 of H002. (ATT) 2. Display item ATT on screen. terminal 3. Change data by Volume s/t buttons so that output at pin 12 of H002 becomes value as close as 142mVrms.
  • Page 17 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 18: 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 be- Check that the set returns to normal operation when pin 12 low.

  • Page 19: Chapter 2 Specific Informations

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

  • Page 20: Location Of Controls

    LOCATION OF CONTROLS Front view TV/VIDEO button VOLUME T/S button CHANNEL s/t button POWER MENU TV/VIDEO VOLUME CHANNEL POWER button T/S/t/s button Remote sensor MENU button POWER indicator COLOR VIDEO VIDEO STREAM VIDEO INPUT MONO MONO S-VIDEO AUDIO AUDIO AUDIO VIDEO-1 VIDEO-2 –...
  • Page 21 Remote MUTE button POWER RECALL MUTE RECALL button POWER buttons Channel Number buttons CH RTN CH RTN button MENU button CHANNEL s/t buttons MENU/ ENTER menu s/t buttons VOLUME T/S buttons menu T/S buttons TV/CABLE/VCR switch CABLE EXIT button Set to “TV” to control the TV. EXIT FAV CH TV/VIDEO...

  • Page 22: Programming Channel Memory

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

  • Page 23: Circuit Block Diagram

    – 21 –...

  • Page 24: 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 : 36A50 Capacitors ..... CD Ceramic Disk : Plastic Film : Electrolytic Resistors ....
  • Page 25 Location Location Part No. Description Part No. Description EL, 2.2?F, ±20%, 50V C673 24669229 CB62 24436561 CD, 560pF C676 24539104 PF, 0.1?F CB63 24591122 PF, 1200pF EL, 470?F, ±20%, 16V C677 24539104 PF, 0.1?F CB64 24763471 EL, 2.2?F, ±20%, 50V C678 24669229 CB65...
  • Page 26 Location Location Part No. Description Part No. Description EL, 0.1?F, ±20%, 50V CV31 24206108 CZ03 24092442 Chip, 0.47?F, EL, 22?F, ±20%, 16V CV36 24794220 +80%, -20%, 16V EL, 220?F, ±20%, 16V CV38 24763221 CZ05 24814103 Chip, 0.01?F, +80%, -20% Chip, 0.1?F, ±10%, 25V CV39 24232103 CD, 0.01?F, +80%, -20%...
  • Page 27 Location Location Part No. Description Part No. Description R309 24553271 OMF, 270 ohm, 1W R503 24366101 CF, 100 ohm R310 24366153 CF, 15k ohm R511 24366471 CF, 470 ohm R311 24366392 CF, 3900 ohm R612 24366103 CF, 10k ohm R313 24366104 CF, 100k ohm R613...
  • Page 28 Location Location Part No. Description Part No. Description R980 24366471 CF, 470 ohm RB61 24366244 CF, 240k ohm R981 24366821 CF, 820 ohm RB62 24366133 CF, 13k ohm R982 24366103 CF, 10k ohm RB63 24366392 CF, 3900 ohm R983 24366222 CF, 2200 ohm RB64 24366103...
  • Page 29 Location Location Part No. Description Part No. Description RV10 24366153 CF, 15k ohm RY98 24872223 Chip, 22k ohm, 1/16W RV11 24366103 CF, 10k ohm RY99 24872683 Chip, 68k ohm, 1/16W RV12 24366102 CF, 1k ohm RZ01 24872102 Chip, 1k ohm, 1/16W RV19 24366101 CF, 100 ohm...
  • Page 30 Location Location Part No. Description Part No. Description LZ04 23238714 Coil, Peaking, TRF4100AJ Q913 23114530 Transistor, 2SA933S-Q LZ05 23238714 Coil, Peaking, TRF4100AJ Q914 23114528 Transistor, 2SC1740S, Q LZ08 23238707 Coil, Peaking, TRF4390AJ QA01 23000287 IC, TMPA8700CPN-1A05 LZ11 23238710 Coil, Peaking, TRF4220AJ QA02 70129486 IC, AT24C08-10PC...
  • Page 31 Location Location Part No. Description Part No. Description D316 23316679 Diode, Zener, MTZJ6.8C F470A 23165433 Holder, Fuse D406 23118094 Diode, EU2A, LF-F10 F801 23144888 Fuse, 5.0A, 125V D408 A7580658 Diode, 3JH41 F801A 23165433 Holder, Fuse D409 23316690 Diode, Zener, MTZJ10B F802 23144511 Fuse, 4.0A, 125V...
  • Page 32 ACCESSORIES ACCESSORIES ACCESSORIES ACCESSORIES K912 23306359 Remote Hand Unit, CT-90037 AT03 23588307 Battery Cover Y101 23563890 Owner’s Manual, English, 36A50 Y101F 23563891 Owner’s Manual, French, 36A50 CABINET PARTS CABINET PARTS CABINET PARTS CABINET PARTS CABINET PARTS A201 23510497 Front Cover...

  • Page 33: Pc Boards Bottom View

    MAIN BOARD PB9399A BOTTOM (FOIL) SIDE – 31 – – 32 –...

  • Page 34: Terminal View Of Transistors

    CRT DRIVE BOARD PB8625D TERMINAL VIEW OF TRANSISTORS BOTTOM (FOIL) SIDE 2SD2253 2SC3852 2SC752GTM 2SC752 2SA1788 (old) 2SD1763A 2SC2482 2SA562TM 2SC5243 2SC1569 2SC2655 2SA1015 2SC4544 2SC4721P 2SC1815 2SA1788 2SC2878 2SA1306 2SC1740S 2SA1186A 2SC2120 2SA9335 ON4409 RN2203 2SD1554 RN2201 2SD2253 RN2004 2SD1556 RN1203 2SC5143...
  • Page 35 MEMO ..........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................– 35 –...
  • Page 36 MEMO ..........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................– 36 –...

  • Page 37: Specifications

    SPECIFICATIONS 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 POWER CONSUMPTION...
  • Page 38 TOSHIBA CORPORATION 1-1, SHIBAURA 1- CHOME, MINATO-KU, TOKYO 105-8001, JAPAN...
  • Page 39 SCHEMATIC DIAGRAM MODEL : 36A50 Chassis No. TAC0010 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 40 SCHEMATIC DIAGRAM MODEL : 36A50 Chassis No. TAC0010 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]. All resistors are 1/6W and 5% 4.

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