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Toshiba 32HF72 Service Manual

N2ps chassis
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SERVICE MANUAL

COLOR TELEVISION
32HF72 , 32HFX72
(TAC0233)
32HF72, 32HFX72 are the same as 36HFX72 except for the parts tabled on back of this sheet.
Use this service manual together with the service manual of 36HFX72, 36HF72 (File No. 020-
200206).
– SUMMARY –
FILE NO. 023-200213
N2PS Chassis
(TAC0232)
PUBLISHED IN JAPAN, Jul., 2002 So

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Summary of Contents for Toshiba 32HF72

  • Page 1: Service Manual

    (TAC0233) (TAC0232) – SUMMARY – 32HF72, 32HFX72 are the same as 36HFX72 except for the parts tabled on back of this sheet. Use this service manual together with the service manual of 36HFX72, 36HF72 (File No. 020- 200206). PUBLISHED IN JAPAN, Jul., 2002 So...
  • Page 2 R664 24011822 Chip, 8200 ohm, 1/20W A701 23064254 Carton (32HFX72) (32HF72) A703 23946056 Packing, Top R674 24011683 Chip, 68k ohm, 1/20W (32HF72) A708 23946057 Packing, Bottom R675 24011683 Chip, 68k ohm, 1/20W (32HF72) C312 24591103 PF, 0.01?F R690 24011392 Chip, 3900 ohm, 1/20W...
  • Page 3 FILE NO. 020-200206 SERVICE MANUAL COLOR TELEVISION N2PS Chassis 36HFX72 , 36HF72 (TAC0230) (TAC0231) PUBLISHED IN JAPAN. Jun. 2002 So...

  • Page 4: Table Of Contents

    TABLE OF CONTENTS CHAPTER 1 GENERAL ADJUSTMENTS SAFETY INSTRUCTIONS ............................3 SET-UP ADJUSTMENT ............................4 SERVICE MODE ..............................8 ELECTRICAL ADJUSTMENTS ..........................11 CIRCUIT CHECKS ..............................13 CHAPTER 2 SPECIFIC INFORMATIONS SETTING & ADJUSTING DATA ..........................14 LOCATION OF CONTROLS ........................... 15 PROGRAMMING CHANNEL MEMORY .........................

  • 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 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 WARNING: BEFORE SERVICING THIS CHASSIS, READ THE “X-RAY RADIATION PRECAUTION”, “SAFETY PRECAU- TION” AND “PRODUCT SAFETY NOTICE” ON PAGE 3 OF SERVICE MANUAL. (SET-UP ADJUSTMENT FOR FLAT TUBE) 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 (5)Adjust the sub-4-pole magnets only in case there is any deviation of Xv bow-shaped convergence. (To be usually set at the initial position) Align both sides with the sub-4-pole magnets and minimize the deviation of blue and red with the main 4-pole magnets. Xv bow-shaped deviation of convergence red/blue blue...

  • Page 10: Service Mode

    SERVICE MODE 1. ENTERING TO SERVICE MODE 1) Press MUTE button twice 2) Press MUTE button 3) While pressing the MUTE button, on Remote Control. again to keep pressing. press MENU button on TV set. 1/2 MUTE MUTE (Service mode display) 2.
  • 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 14) 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: 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 14 ITEM ADJUSTMENT PROCEDURE E-W PARABOLA (DPC) 1. Call up the adjustment mode display, then select the item PARA. (PARA) 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 15: 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 below. Check that the set returns to normal operation when pin 12 1.

  • Page 16: Chapter 2 Specific Informations

    CHAPTER 2 SPECIFIC INFORMATIONS SETTING & ADJUSTING DATA SAFETY INSTRUCTIONS 36" HIGH VOLTAGE AT ZERO BEAM: 32.7 kV MAX HIGH VOLTAGE: 34.1 kV Table-1 SERVICE MODE ADJUSTING ITEMS AND DATAS IN THE SERVICE MODE: Item Name of adjustment Preset Data Item Name of adjustment Preset...

  • Page 17: Location Of Controls

    LOCATION OF CONTROLS (Representatives: 36HFX72) TV Front MENU Video/Audio inputs VOLUME T S (Video 3) CHANNEL ts DEMO MENU TV/VIDEO VOLUME CHANNEL VIDEO-3 IN S-VIDEO VIDEO L/MONO-AUDIO-R POWER MENU TV/VIDEO T Sts Remote sensor DEMO Power indicator TV Rear ANT(75 ANT-1 ANT-2 S-VIDEO...

  • Page 18: Remote Control

    Remote Control Power turns the TV on or off SLEEP sets the TV to turn at a specific time LIGHT The initial press of the LIGHT button causes two actions: Channel Numbers (0–9, 100) allow direct access to channels MODE cycles through the 6 device modes FAVOURITE allows access to Multi-Window function PIC SIZE cycles through the three picure formats...

  • Page 19: 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 20: 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 21 Location Location Parts No. Description Parts No. Description C476 24214471 CERAMIC DISC, 500V B 470PF K C684 24668102 ELECTROLYTIC, 35V 1000UF M 3A (36HFX72) C477 24666220 ELECTROLYTIC, 16V 22UF M 3A C686 24503041 PLASTIC FILM , 63V 0.1UF J (36HFX72) C480 24794100 ELECTROLYTIC, 16V 10UF M...
  • Page 22 Location Location Parts No. Description Parts No. Description C884 24086049 ELECTROLYTIC, 160V 330UF M 3D CA06 24109392 CERAMIC CHIP, 50V B 3900PF K C885 24214471 CERAMIC DISC, 500V B 470PF K CA07 24109392 CERAMIC CHIP, 50V B 3900PF K C886 24214471 CERAMIC DISC, 500V B 470PF K CA23...
  • Page 23 Location Location Parts No. Description Parts No. Description CD19 24590183 PLASTIC FILM, 50V 0.018UF J (36HFX72) CS12 24105221 CERAMIC CHIP, 50V CH 220PF J CD19 24567333 PLASTIC FILM, 50V 33000PF J (36HF72) CS13 24797010 ELECTROLYTIC, 50V 1UF M CD20 24503038 MT PLA CAP 63V 0.056UF J (36HFX72) CS14 24105221...
  • Page 24 Location Location Parts No. Description Parts No. Description CV266 24794470 ELECTORLYTIC, 16V 47UF M R379 24382103 OXIDE METAL FILM, 1W 10K OHM J CV269 24794470 ELECTORLYTIC, 16V 47UF M R380 24946226 CARBON CONPOSITI0N, 1/2W 22M OHM K CV272 24794470 ELECTORLYTIC, 16V 47UF M R381 24366822 CARBON FILM, 1/6W 8.2K OHM J...
  • Page 25 Location Location Parts No. Description Parts No. Description R514 24011103 CHIP, METAL FILM, 1/20W 10K OHM J R718 24366222 CARBON FILM, 1/6W 2.2K OHM J R515 24011103 CHIP, METAL FILM, 1/20W 10K OHM J R719 24366101 CARBON FILM, 1/6W 100 OHM J R525 24011752 CHIP, METAL FILM, 1/20W 7.5K OHM J...
  • Page 26 Location Location Parts No. Description Parts No. Description R926 24366102 CARBON FILM, 1/6W 1K OHM J R2107 24011101 CHIP, METAL FILM, 1/20W 100 OHM J R928 24366151 CARBON FILM, 1/6W 150 OHM J R2108 24011103 CHIP, METAL FILM, 1/20W 10K OHM J R929 24366470 CARBON FILM, 1/6W 47 OHM J...
  • Page 27 Location Location Parts No. Description Parts No. Description R4819 24366102 CARBON FILM, 1/6W 1K OHM J RA161 24011103 CHIP, METAL FILM, 1/20W 10K OHM J R4820 24011103 CHIP, METAL FILM, 1/20W 10K OHM J RA191 24011101 CHIP, METAL FILM, 1/20W 100 OHM J R5020 24011101 CHIP, METAL FILM, 1/20W 100 OHM J...
  • Page 28 Location Location Parts No. Description Parts No. Description RD02 24366105 CARBON FILM, 1/6W 1M OHM J (36HFX72) RD86 24366223 CARBON FILM, 1/6W 22K OHM J (36HFX72) RD02 24366223 CARBON FILM, 1/6W 22K OHM J (36HF72) RD87 24366223 CARBON FILM, 1/6W 22K OHM J (36HFX72) RD03 24366101 CARBON FILM, 1/6W 100 OHM J...
  • Page 29 Location Location Parts No. Description Parts No. Description RS109 24011392 CHIP, METAL FILM, 1/20W 3.9K OHM J RV111 24011100 CHIP, METAL FILM, 1/20W 10 OHM J RS110 24011471 CHIP, METAL FILM, 1/20W 470 OHM J RV117 24011750 CHIP, METAL FILM, 1/20W 75 OHM J RS112 24011223 CHIP, METAL FILM, 1/20W 22K OHM J RV118 24011750...
  • Page 30 Location Location Parts No. Description Parts No. Description L836 23248235 COIL, CHOKE 12X18H 22MMH 4.2A, Q308 23114528 TRANSISTOR, 2SC1740S TLN3462AF Q340 23205057 TRANSISTOR, KTC3875Y L837 23280018 COIL, PEAKING, TRF4220AZ Q360 23205057 TRANSISTOR, KTC3875Y L861 23103941 COIL, CHOKE, TEM2011 Q370 23314962 TRANSISTOR, KTA1266 Y L862 23103880...
  • Page 31 Location Location Parts No. Description Parts No. Description Q836 23114458 TRANSISTOR, RN1206 QB93 23205045 TRANSISTOR, 2SA1037AKQ Q836 23319202 IC, MC7809CT QB94 23205045 TRANSISTOR, 2SA1037AKQ Q836B 70391355 SCREW, 3X8MM QB95 23205045 TRANSISTOR, 2SA1037AKQ Q837 23319202 IC, MC7809CT QB96 23205045 TRANSISTOR, 2SA1037AKQ Q837B 70391355 SCREW, 3X8MM QD01...
  • Page 32 Location Location Parts No. Description Parts No. Description D408 23316472 DIODE, RGP10J D886 23316819 DIODE, RU4YX D410 23118094 DIODE, EU2A D892 23316184 DIODE, FML-G12S D412 23118094 DIODE, EU2A D892B 70391355 SCREW, 3X8MM D413 23118859 DIODE, 1SS133 D893 23316184 DIODE, FML-G12S D414 23316688 DIODE, ZENER, MTZJ9.1C...
  • Page 33 Location Location Parts No. Description Parts No. Description DV11 23316587 DIODE, ZENER CHIP VZ8.58-9.02V MA8091-L GJ664 24000445 CHIP JUMPER, 1608TYPE (36HFX72) DV13 23316587 DIODE, ZENER CHIP VZ8.58-9.02V MA8091-L GJA33 24000445 CHIP JUMPER, 1608TYPE DV17 23316587 DIODE, ZENER CHIP VZ8.58-9.02V MA8091-L GR07 24000445 CHIP JUMPER, 1608TYPE...
  • Page 34 Location Location Parts No. Description Parts No. Description UA01 23787490 CONTROL-1 BOARD, PD0651A UA02 23787491 CONTROL-2 BOARD, PD0652A UD01 23787466 WOW BOARD, PD0645A (36HFX72) UD01 23787893 SRS-3D BOARD, PD0644B (36HF72) PICTURE TUBE * V901 23312929 PICTURE TUBE, ITC36VPF LH0.22, A90AJZ90X30 TUNER * H001 23321411...

  • Page 35: Pc Boards Bottom View

    SIGNAL BOARD PD0650 BOTTOM (FOIL) SIDE – 33 – – 34 –...
  • Page 36 POWER/DEF BOARD PD0159 BOTTOM (FOIL) SIDE – 35 – – 36 –...
  • Page 37 CRT-D/VM BOARD PD0164 BOTTOM (FOIL) SIDE – 37 –...
  • Page 38 AC IN BOARD PD0161 BOTTOM (FOIL) SIDE LOW B BOARD PB9567 BOTTOM (FOIL) SIDE – 38 –...
  • Page 39 CONTROL-1 BOARD PD0651 BOTTOM (FOIL) SIDE – 39 –...
  • Page 40 CONTROL-2 BOARD PD0652 BOTTOM (FOIL) SIDE – 40 –...
  • Page 41 WOW BOARD PD0645 BOTTOM (FOIL) SIDE – 41 –...

  • Page 42: 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 2SC5143 RN1204 2SC5570 RN2204 2SD2553 RN1205 RN1202 RN1201...

  • Page 43: Schematic Diagram

    SCHEMATIC DIAGRAM MODEL : 36HFX72 36HF72 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 44 – 44 –...

  • Page 45: Specifications

    SPECIFICATIONS(Represenlative: 36HFX72) 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 46: Circuit Block Diagram

    TOSHIBA CORPORATION 1-1, SHIBAURA 1- CHOME, MINATO-KU, TOKYO 105-8001, JAPAN...
  • Page 47 SCHEMATIC DIAGRAM MODEL : 36HFX72 36HF72 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 48 – 44 –...

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