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Toshiba 55A10A Service Manual

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SERVICE MANUAL
COLOR TELEVISION
55A10A is the same as 55A10 except for the parts tabled on back of this sheet.
Use this service manual together with the service manual of 50A10, 55A10
(File No. 023-200024), and original service manual of 50A60, 50A50, 55A60, 61A60
(File No. 020-200012).
55A10A
– SUMMARY –
FILE NO. 023-200035
N0NSP Chassis
(TAC0056)
PUBLISHED IN JAPAN, Nov., 2000 So

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Summary of Contents for Toshiba 55A10A

  • Page 1 (TAC0056) – SUMMARY – 55A10A is the same as 55A10 except for the parts tabled on back of this sheet. Use this service manual together with the service manual of 50A10, 55A10 (File No. 023-200024), and original service manual of 50A60, 50A50, 55A60, 61A60 (File No.
  • Page 2 REPLACEMENT PARTS LIST DIFFERENCES Location Part No. Description K601 23430923 Mirror, MIRROR55K2 Y101 23563971 Owner’s Manual, English, 55A10A Y101F 23563972 Owner’s Manual, French, 55A10A TOSHIBA CORPORATION 1-1, SHIBAURA 1-CHOME, MINATO-KU, TOKYO 105-8001, JAPAN...
  • Page 3 FILE NO. 020-200012 SERVICE MANUAL COLOR TELEVISION N0NSP Chassis 50A60 , 50A50 (TAC0050) (TAC0051) 55A60 , 61A60 (TAC0052) (TAC0053) PUBLISHED IN JAPAN, May., 2000 S...

  • Page 4: Table Of Contents

    TABLE OF CONTENTS CHAPTER 1 GENERAL ADJUSTMENTS SAFETY INSTRUCTIONS ............................3 CRT ASSEMBLY REPLACEMENT AND MOUNTING ..................... 4 PICTURE TUBE COMPONENTS ADJUSTMENT ....................6 REPLACEMENT OF THE CRT ..........................8 SERVICE MODE ..............................9 ELECTRICAL ADJUSTMENT ..........................11 CONVERGENCE ADJUSTMENT .......................... 13 SCREEN AND MIRROR ALIGNMENTS ........................

  • 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 hazardous 2. This receiver is equipped with a Fail Safe (FS) circuit which X-RAY RADIATION.

  • Page 6: Crt Assembly Replacement And Mounting

    CRT ASSEMBLY REPLACEMENT AND MOUNTING CAUTION : DO NOT LOOSEN THE HEX HEAD BOLTS WITH SPRINGS (12 PCS), BECAUSE THOSE ARE FOR SEALING OF CRT COOLANT. Attention Serviceman The Hex Head Bolts with Springs. (see sketch) used on CRT assembly, 8 o’clock are “NOT”...
  • Page 7 TO REMOVE CRT (Same procedure for R, G, B) 1. Remove CRT DRIVE Board, S. V. M. COIL and DEF. YOKE from CRT. 2. Remove Lens Assembly. 3. Detach CRT Anode Cap from CRT. 4. Remove CRT Assembly from CRT Mounting. Anode Cap CRT REPLACEMENT (Same procedure for R, G, B) Reverse the removal procedures except the followings.

  • Page 8: Picture Tube Components Adjustment

    WARNING : BEFORE SERVICING THIS CHASSIS, READ THE “X-RAY RADIATION PRECAUTION”, “SAFETY PRE- CAUTION” AND “PRODUCT SAFETY NOTICE” ON PAGE 3 OF THIS MANUAL. PICTURE TUBE COMPONENTS ADJUSTMENT DESCRIPTION OF NECK COMPONENTS TILT ADJUSTMENT Rotate R, G, B deflection yoke so that picture becomes horizon, then fasten screw.
  • Page 9 LOCATION OF SCREEN AND FOCUS VR’S SCREEN VR FOCUS VR – 7 –...

  • Page 10: Replacement Of The Crt

    REPLACEMENT OF THE CRT Service parts are provided for each R, G and B. The contents of the parts are as follows. 50A50 23796001 23005397 23796003 ↑ 50A60 23005114 23005115 HITACHI ↑ ↑ 55A60 23005242 ↑ 61A60 23005249 23796486 REPLACEMENT OF HIGH VOLTAGE CABLE 1.

  • Page 11: 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 12 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 13: Electrical Adjustment

    ELECTRICAL ADJUSTMENT ITEM ADJUSTMENT PROCEDURE VERTICAL POSITION (VCEN) 1. Call up the adjustment mode display, then select item VCEN. 2. Press the VOLUME s or t button to get the voltage +30 ±10 mV. 3. Measuring method of voltage as follows. TP-V (on SIGNAL board) DIGITAL...
  • Page 14 ITEM ADJUSTMENT PROCEDURE HEIGHT 1. Call up the adjustment mode display, then select the item HIT. (HIT) 2. Press the VOLUME s or t button to get the picture so the top of raster begins to lack. 3. Press the VOLUME s button to advance the data by 10 steps. Note : Check the vertical picture position is correct.

  • Page 15: Convergence Adjustment

    CONVERGENCE ADJUSTMENT Adjust convergence from center to circumference in order. 1. Select the adjustment mode following the steps on page 9. RCUT KEY FUNCTION IN THE CONVERGENCE ADJUSTMENT: Up : 2 button Selet Green color: 3 button Left : 4 button 2.
  • Page 16 NOTES In many cases, color misconvergence may be corrected by returning HIT and WID data in main deflection side to initial adjusting values. Following cases will surely require readjustment of convergence. CRT REPLACEMENT When CRT is replaced, main deflection readjustment and color matching are required. Perform following procedures.

  • Page 17: Screen And Mirror Alignments

    SCREEN AND MIRROR ALIGNMENTS ASSEMBLING OF MOUNTING OF FRONT SCREEN FRONT SCREEN 5 screws Fresnel sheet 3 screws Protect shield FRONT 3 screws (for 50”) Lenticular sheet 3 screws Protect shield FRONT Fresnel sheet Stick cotton cloth tape Label with part Label with part number number...

  • Page 18: Circuit Checks

    CIRCUIT CHECKS HIGH VOLTAGE CHECK FS CIRCUIT CHECK CAUTION: There is no HIGH VOLTAGE ADJUSTMENT on The Fail Safe (FS) circuit check is indispensable for the final this chassis. Checking should be done following check in servicing. Checking should be done following the the steps below.

  • Page 19: Chapter 2 Specific Informations

    CHAPTER 2 SPECIFIC INFORMATIONS SETTING & ADJUSTING DATA SAFETY INSTRUCTIONS 43", 50", 55", 61" HIGH VOLTAGE AT ZERO BEAM: 31.3 kV MAX HIGH VOLTAGE: 32.4 kV Table-1 SERVICE MODE ADJUSTING ITEMS AND DATA IN THE SERVICE MODE: Item Name of adjustment Preset Date Item...

  • Page 20: Location Of Controls

    LOCATION OF CONTROLS (Representative : 50A60) TV front Behind the door MENU EXIT TV/VIDEO DEMO AUDIO S-VIDEO POWER VIDEO L/MONO Video Audio inputs POWER VOLUMET S EXIT DEMO MENU CHANNEL st TV/VIDEO TV rear ANT (75Ω) ANT-1 AUDIO CENTER CHANNEL IN S-VIDEO ANT-2 AUDIO...
  • Page 21 Remote Control RECALL LIGHT RECALL POWER LIGHT POWER TV/CABLE/VCR switch MUTE TV/VIDEO TIMER CABLE Set to “TV” to control the TV. TIMER MUTE TV/VIDEO CHANNEL s/t Channel Number VOLUME s/t CH RTN CH RTN C. CAPT ADV/ MENU PIP CH ENTER PIP CH s FAV t...

  • Page 22: Programming Channel Memory

    PROGRAMMING CHANNEL MEMORY The channel memory is the list of TV channel numbers the TV tunes in 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 23: Circuit Block Diagram

    CIRCUIT BLOCK DIAGRAM – 21 – – 22 –...

  • Page 24: Mechanical Disassembly

    MECHANICAL DISASSEMBLY 1 Speaker Grille Removal 2 Control Panel Removal 3 Front Mask Removal 4 Mask Removal A101 A201 A267 A221 A201 (A322) A213 A224 A266 A202 K502 A103 A126 A266 A265 A268 A127 K501 (K511) 4 screws A102 5 Shield Plate, Lens Removal 6 Mirror Removal 7 Back Board Removal 8 Light Box Removal...

  • Page 25: Chassis Replacement Parts List

    CHASSIS REPLACEMENT PARTS LIST WARNING: BEFORE SERVICING THIS CHASSIS, READ THE “X-RAY RADIATION PRECAUTION”, “SAFETY PRE- CAUTION” AND “PRODUCT SAFETY NOTICE” ON PAGE 3 OF THIS MANUAL. 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 26 Location Location Part No. Description Part No. Description CD, 1500pF, ±10%, 2kV EL, 10?F, ±20%, 50V C415 24092484 C628 24206100 EL, 10?F, ±20%, 50V (50A60/55A60/61A60) C629 24206100 EL, 0.1?F, ±20%, 50V C416 24828333 PF, 0.033?F, 200V C630 24206108 EL, 2.2?F, ±20%, 250V C417 24679229 C631...
  • Page 27 Location Location Part No. Description Part No. Description EL, 2.2?F, ±20%, 200V C739 24092293 Chip, 0.1?F, +80%, -20%, 25V C869 24678229 C740 24092293 Chip, 0.1?F, +80%, -20%, 25V C870 24082890 PF, 0.082?F, 800V EL, 47?F, ±20%, 16V CD, 1500pF, ±10%, 2kV C741 24794470 C871...
  • Page 28 Location Location Part No. Description Part No. Description EL, 100?F, ±20%, 25V EL, 1?F, ±20%, 50V C7755 24667101 CS04 24206010 EL, 4.7?F, ±20%, 50V C7765 24669479 CS07 24436221 CD, 220pF EL, 4.7?F, ±20%, 50V EL, 1?F, ±20%, 50V C7766 24669479 CS08 24206010 EL, 47?F, ±20%, 25V...
  • Page 29 Location Location Part No. Description Part No. Description EL, 10?F, ±20%, 50V CV64 24206100 R150 24872101 Chip, 100 ohm, 1/16W CV65 24591122 PF, 1200pF (50A60/55A60/61A60) CV66 24436561 CD, 560pF R151 24872562 Chip, 5600 ohm, 1/16W CV67 24591102 PF, 1000pF (50A60/55A60/61A60) EL, 1?F, ±20%, 50V CV68 24206010...
  • Page 30 Location Location Part No. Description Part No. Description R338 24872682 Chip, 6800 ohm, 1/16W R428 24310109 MF, 1.0 ohm, 1/2W (50A60/55A60/61A60) R431 24383102 OMF, 1k ohm, 2W R339 24872393 Chip, 39k ohm, 1/16W (50A60/55A60/61A60) (50A60/55A60/61A60) R432 24376274 CF, 270k ohm, 1/2W R340 24872824 Chip, 820k ohm, 1/16W...
  • Page 31 Location Location Part No. Description Part No. Description R512 24872101 Chip, 100 ohm, 1/16W R709 24872100 Chip, 10 ohm, 1/16W R514 24872122 Chip, 1200 ohm, 1/16W R710 24872100 Chip, 10 ohm, 1/16W R515 24872103 Chip, 10k ohm, 1/16W R711 24872100 Chip, 10 ohm, 1/16W R530 24872101...
  • Page 32 Location Location Part No. Description Part No. Description R818 24366471 CF, 470 ohm R965 24366471 CF, 470 ohm R819 24366102 CF, 1k ohm R966 24366821 CF, 820 ohm MF, 15k ohm, ±1%, 1/4W R820 24327153 R967 24366122 CF, 1200 ohm MF, 12k ohm, ±1%, 1/4W R821 24327123...
  • Page 33 Location Location Part No. Description Part No. Description R7779 24872102 Chip, 1k ohm, 1/16W RB03 24872101 Chip, 100 ohm, 1/16W R7780 24872102 Chip, 1k ohm, 1/16W RB04 24366103 CF, 10k ohm R7781 24872333 Chip, 33k ohm, 1/16W RB14 24872153 Chip, 15k ohm, 1/16W R7786 24872472 Chip, 4700 ohm, 1/16W...
  • Page 34 Location Location Part No. Description Part No. Description RS21 24366104 CF, 100k ohm RV93 24366103 CF, 10k ohm RS22 24366104 CF, 100k ohm RV94 24366392 CF, 3900 ohm RS25 24366223 CF, 22k ohm RV95 24366123 CF, 12k ohm RS26 24366223 CF, 22k ohm RV96 24366274...
  • Page 35 Location Location Part No. Description Part No. Description RZ03 24872332 Chip, 3300 ohm, 1/16W L724 23289102 Coil, Peaking, TRF4102AJ RZ04 24872122 Chip, 1200 ohm, 1/16W L725 23237805 Coil, Peaking, TRF4222 RZ05 24872471 Chip, 470 ohm, 1/16W L726 23289102 Coil, Peaking, TRF4102AJ RZ06 24872821 Chip, 820 ohm, 1/16W...
  • Page 36 Location Location Part No. Description Part No. Description LW04 23245834 Chip, Inductor, TRF4220CB Q502 A6335470 Transistor, 2SC2712-Y LW05 23103859 Coil (Ferrite Bead), TEM2011 Q503 A6541130 Transistor, 2SA1162-Y LW07 23289220 Coil, Peaking, TRF4220AF Q520 A6541130 Transistor, 2SA1162-Y LY01 23245832 Chip, Inductor, TRF4150CB Q521 A6541130 Transistor, 2SA1162-Y...
  • Page 37 Location Location Part No. Description Part No. Description Q972 A6317440 Transistor, 2SC1815-Y QY26 23114528 Transistor, 2SC1740S, Q Q973 A6317440 Transistor, 2SC1815-Y QZ01 B0410895 IC, TC90A49P Q974 A6317440 Transistor, 2SC1815-Y QZ02 A6541130 Transistor, 2SA1162-Y Q975 A6317440 Transistor, 2SC1815-Y QZ03 A6541130 Transistor, 2SA1162-Y Q976 A6317440 Transistor, 2SC1815-Y...
  • Page 38 Location Location Part No. Description Part No. Description D661 23316570 Diode, Zener, MA8056-L, TX DV01 23316686 Diode, Zener, MTZJ9.1A D701 23115537 Diode, 1SS131 DV02 23316686 Diode, Zener, MTZJ9.1A D702 23115537 Diode, 1SS131 DV03 23316686 Diode, Zener, MTZJ9.1A D703 23115537 Diode, 1SS131 DV07 23316686 Diode, Zener, MTZJ9.1A...
  • Page 39 Location Location Part No. Description Part No. Description KB11 23904946 Remote Sensor, E033Z CRT-D/B Board, PB9454A3 RPM-676CBR-S (50A60/55A60/61A60) P002 23365089 F Connector(50A50) E033Z CRT-D/B Board, PB9454B3 P701 23367724 Plug, B-B,15P (50A50) P702 23367724 Plug, B-B,15P E034Z FRONT-CON Board, PB9454A4 P708 23902655 Socket, B-B, 15P (50A60/55A60/61A60)
  • Page 40 Location Location Part No. Description Part No. Description ACCESSORIES ACCESSORIES ACCESSORIES ACCESSORIES ACCESSORIES A703 23935868 Packing, Top(61A60) A708 23935848 Packing, Bottom (50A60/50A50) K912 23306263 Remote Hand Unit, CT-9946 A708 23935866 Packing, Bottom (55A60/61A60) (50A60/55A60/61A60) A721 23943628 Cover, Poly K912 23306359 Remote Hand Unit, CT-90037 K111 23430111...
  • Page 41 SIGNAL/CON BOARD PB9450 BOTTOM (FOIL) SIDE – 41 – – 42 –...
  • Page 42 DEF/POWER BOARD PB9451 BOTTOM (FOIL) SIDE – 43 – – 44 –...
  • Page 43 BACK/AV BOARD PB9452 BOTTOM (FOIL) SIDE – 45 –...
  • Page 44 DIGI-CONV BOARD PB9453 BOTTOM (FOIL) SIDE DIGI-COMB BOARD PB9398 BOTTOM (FOIL) SIDE – 46 –...
  • Page 45 R-DRIVE BOARD PB9454-1 BOTTOM (FOIL) SIDE B-DRIVE BOARD PB9454-3 BOTTOM (FOIL) SIDE – 47 –...
  • Page 46 B-DRIVE BOARD PB9454-2 FRONT-CONT BOARD PB9454-4 BOTTOM (FOIL) SIDE BOTTOM (FOIL) SIDE – 48 –...
  • Page 47 FRONT-CONV BOARD PB9454-5 BOTTOM (FOIL) SIDE FRONT-IN BOARD PB9454-9 BOTTOM (FOIL) SIDE REM BOARD PB9454-10 BOTTOM (FOIL) SIDE – 49 –...
  • Page 48 SVM BOARD PB9454-6 FRONT-CON BOARD PB9454-8 BOTTOM (FOIL) SIDE BOTTOM (FOIL) SIDE – 50 –...

  • Page 49: 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 50 MEMO ..........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................– 52 –...

  • Page 51: Specifications

    SPECIFICATIONS (Representative: 50A60) 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 120 V AC, 60 Hz POWER CONSUMPTION...
  • Page 52 TOSHIBA CORPORATION 1-1, SHIBAURA 1- CHOME, MINATO-KU, TOKYO 105-8001, JAPAN...

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