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Toshiba 40WH08G Service Manual
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Toshiba 40WH08G Service Manual

Toshiba 40WH08G Service Manual

C00p chassis
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FILE NO. 030-200004
SERVICE MANUAL
COLOUR TELEVISION
C00P Chassis
40WH08G , 40WH08B
PRINTED IN JAPAN Jun., 1999 T

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  • Page 1 FILE NO. 030-200004 SERVICE MANUAL COLOUR TELEVISION C00P Chassis 40WH08G , 40WH08B PRINTED IN JAPAN Jun., 1999 T...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS CHAPTER 1 GENERAL ADJUSTMENTS SAFETY INSTRUCTIONS ............................3 CRT ASSEMBLY REPLACEMENT AND MOUNTING ..................... 4 PICTURE TUBE COMPONENTS ADJUSTMENT ....................6 SERVICE POSITION ..............................9 SERVICE MODE ..............................10 DESIGN MODE ..............................13 ELECTRICAL ADJUSTMENT ..........................14 CONVERGENCE ADJUSTMENT ..........................

  • 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: 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, are “NOT”...
  • Page 5 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 6: 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 ADJUSTING PROCEDURE IN REPLACING CRT RGB FOCUS ADJUSTMENT 1. Call-up the adjustment mode (see page 10) User convergence center check Cutoff 2.
  • Page 7 Note: The aim of the above-described adjustment procedure Note: Keep in mind that only the BLUE electric focus is ad- for the Green lens focus is to obtain the best lens focus justed with the black cross-hatch. after 2 - 3 hours of warming up taking into account the focus drift;...
  • Page 8 LOCATION OF SCREEN AND FOCUS VR'S To remove the Speaker grille and Front panel. SCREEN VR FOCUS VR Front panel Speaker grille REPLACEMENT OF HIGH VOLTAGE CABLE 1. When replacing Anode Lead or Anode Cap with new one, remove Lead Holder from old lead as shown in ANODE LEAD figure below, and put it on new lead.

  • Page 9: Service Position

    WARNING : BEFORE SERVICING THIS CHASSIS, READ THE "X-RAY RADIATION PRECAUTION", "SAFETY PRECAU- TION" AND "PRODUCT SAFETY NOTICE" ON PAGE 3 OF THIS MANUAL. SERVICE POSITION In order to assure the performance, processed wires shall be replaced after the repair work. Work procedures are as follows: Remove the back board.

  • Page 10: 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 or Sound 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 33) 5.
  • Page 12 SELF DIAGNOSTIC FUCTION for some model. 3) Press "9" button on Remote Control during display of selfcheck display as above, the selfcheck screen for EPG/TEXT unit as shown below is displayed. (This function is only 40WH08G (EPG model). SELFCHECK...

  • Page 13: Design Mode

    DESIGN MODE 1. ENTERING TO DESIGN MODE 1) Select the Service mode. 2) While pressing CALL button on Remote 3) Press MENU button on TV. 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 14: Electrical Adjustment

    ELECTRICAL ADJUSTMENT ITEM ADJUSTMENT PROCEDURE 1. Select picture size WIDE mode. WIDTH 2. Call up the adjustment mode display, and press the TV/VIDEO (WID) button on the remote untill the white cross dot pattern appears on the screen. 3. Press the CHANNEL s or t button to select the item WID and press the VOLUME s or t button to get the pictuer so the left and right edges of rester begin to lack.
  • Page 15 (Reference factory adjustment) Item Name Setting Input signal Measuring point Adjusting method Adjustment standard 2.4 ± 0.1 Vpp [SCNT] Sub-contrast Picture mode 1 Sub-bright signal TP46B SIGNAL unit Adjust the amplitude from the pedestal udio system: I (PAL-I signal) level to the white peak. Wide mode 4 ±...
  • Page 16 GENERAL ADJUSTMENTS Item Name Setting Input signal Measuring point Adjusting method Adjustment standard Screen Screen Factory- screen- CRT screen Make the surrounding as dark as Point where it adjustment adjustment mode possible. begins to emit light. Enter factory-screen-adjustment mode. (Y mute, DRV.CUT. = 40 H) Directly observe the CRT screen, and adjust the screen VR to the point where it begins to emit light.
  • Page 17 Focus adjustment method (1/2) Model Adjustment points Adjustment methods 40WH08G Conditions: (1) RED, BLUE: Internal Retoma signals (PAL) 40WH08B (2) GREEN: Internal crosshatch signal (white crosshatch on black background) (3) User adjustment: Dynamic mode, cinema mode (4) Carry out electrical focus and lens focus after rough adjustment.
  • Page 18 GENERAL ADJUSTMENTS Focus adjustment method (2/2) GREEN lens f o cus adjustment Model Metodo di regolazione [1] 40WH08 series (1)Receive internal crosshatch signals, use the lens cap, and concentrate on the single color of G. (2)Watch the horizon of both the left and right ends on the horizontal axis of the screen, adjust the lens focus of G to the very best, and check that the left-and-right focus balance is appropriate.
  • Page 19 Completion of adjustment Item Name Setting Input signal Measuring point Adjusting method Adjustment standard Screen Picture mode 1 Phillips pattern Screen adjustment (1)Adjust the vertical and horizontal Less than ø7mm position (PAL-I) screen positions and centering magnet adjustment so that the central + mark of the dummy screen and the + mark of the Phillips pattern can overlap in conformity.
  • Page 20 GENERAL ADJUSTMENTS Completion of adjustment Item Name Setting Input signal Measuring point Adjusting method Adjustment standard Vertical ampli- Picture mode 1 Phillips pattern Screen adjustment (1)Turn the screen size to SUB-TITLE. tude adjustment Super-live mode (PAL-I) (2)Adjust the registers on the top and (PAL SUB- bottom of the Phillips pattern as shown TITLE)
  • Page 21 Completion of adjustment Item Name Setting Input signal Measuring point Adjusting method Adjustment standard NWIDE Horizontal Picture mode 1 Monosco signals Screen adjustment (1)Turn the screen size to WIDE. amplitude WIDE mode NTSC (2)Adjust the 2nd left register to the left adjustment LEADER-435B edge of the screen.

  • Page 22: Convergence Adjustment

    CONVERGENCE ADJUSTMENT 1. Screen Adjustment The four PAL screens Wide/4:3, Super Live, Cinema and Subtitle, and the four NTSC screens Wide/4:3, Super Live, Cinema and Subtitle are adjusted. When adjusting, input an external signal for matching the sync. CAUTION: The convergence circuit eliminates screen distortion but cannot make large corrections such as changing the overall screen size.
  • Page 23 1-2. Remote Contr o l Key o key ....Push this key twice and the set con- SIZE sole menu key to enter the service mode . F key ....Push this key and 7 key to enter CALL TEXT the con vergence menu.
  • Page 24 1-3. Adjusting Screen 1) Adjusting menu Description Item Adjust PAL Wide Used for manual adjustment of the Wide/4:3 screen in the PAL mode. Returns to the original screen data screen before data conversion, explained below. PAL Wide to others Automatically saves approximate supplementary data for the other PAL screens based on the PAL Wide/4:3 screen data.
  • Page 25 Item Description Adjust NTSC S.Live Used for manual adjustment of the NTSC Super Live screen. Select this mode for Super Live screen color matching and distortion adjustment. Use the specified dimensions when adjusting. Adjust NTSC Cinema Used for manual adjustment of the NTSC Cinema screen. Select this mode for Cinema screen color matching and distortion adjustment.
  • Page 26 2. Case Study In many cases, color matching problems can be solved by returning the HIT and WID data for main deflection to the initial adjustment values. Convergence cannot be re-adjusted in the following cases. 2-1 When the CRT has been replaced Main deflection re-adjustment and color matching are necessary when the CRT has been replaced.
  • Page 27 3 Screen adjustment dimensions 3-1 WIDE/4:3 (PAL mode) 207.5 124.5 41.5 (screen center) 41.5 124.5 207.5 3-2 Super Wide (PAL mode) 249.0 220.0 130.5 (pattern center) 49.5 136.5 221.0 249.0 Caution: Do not perform the VLIN adjustment. – 27 –...
  • Page 28 3-3 Cinema (PAL mode) Note: The cursor will move outside the screen limits in the Cinema mode; therefore, be careful to consider the position of the cursor displayed on the screen when making adjustments. 262.5 227.5 157.5 52.5 52.5 157.5 227.5 262.5 3-4 Subtitle (PAL mode)
  • Page 29 3-5 WIDE/4:3 (NTSC mode) (screen center) 3-6 Super Live (NTSC mode) (pattern center) Caution: Do not perform the VLIN adjustment. – 29 –...
  • Page 30 3-7 Cinema (NTSC mode) Note: The cursor will move outside the screen limits in the Cinema mode; therefore, be careful to consider the position of the cursor displayed on the screen when making adjustments. Note: Please be aware that the Cinema screen convergence pattern center is located at the center of the screen but the image center is located approximately 13mm above that.

  • Page 31: Screen And Mirror Alignments

    SCREEN AND MIRROR ALIGNMENTS ASSEMBLING AND MOUNTING OF FRONT SCREEN * Please refer to MECHANICAL DISASSEMBLY page 37. CLEANING OF LENS AND MIRROR CAUTION : Do not hold the optical system parts (lens and mirror) with bare hand to avoid finger-prints on the surface of those parts.

  • Page 32: Circuit Checks

    CIRCUIT CHECKS 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 anode of the picture tube. 2. Turn on the receiver. Set the BRIGHTNESS and CONTRAST to minimum (zero beam current). 3.

  • Page 33: Chapter 2 Specific Informations

    SuperLive Cinema Substitle 14:9 VLIN Table-2-1 DESIGN MODE ADJUSTING ITEMS AND D ATAS IN THE DESIGN MODE: Preset Data of Preset Data of Item Name of adjustment Remarks 40WH08G 40WH08B OPT1 OPTION 1 OPT0 OPTION 0 Table-3 – 33 –...

  • Page 34: Location Of Controls

    LOCATION OF CONTROLS Front MAIN SWITCH HEAD PHONE (VIDEO-3) S-VIDEO TERMINAL POWER (RED) VIDEO-3 ON TIMER (GREEN) BILINGUAL (ORANGE) MENU STEREO (GREEN) VOLUME DOWN EXIT VOLUME UP POSITION UP POSITION DOWN Back DIGITAL AUDIO INPUT (COAXIAL) DIGITAL AUDIO INPUT (OPTICAL) EXTERNAL SPEAKER SWITCH EXTERNAL SPEAKER...
  • Page 35 ENTER ENTER MENU EXIT MENU Buttons EXIT • Stereo/Bilingual • Sound Mute V T R / D VD Volume Video Recoder/DVD Buttons to operate your Toshiba Video Recorder & DVD V T R / D V D – 35 –...

  • Page 36: Circuit Block Diagram

    – 36 –...

  • Page 37: Mechanical Disassembly

    MECHANICAL DISASSEMBLY K502 16 SCREWS A262 A264 K601 K501 LABELS A262 10 SCREWS SCREWS 8 SCREWS A420 A424 8 SCREWS A201 A213 (A214) (A223) A101 A202 A268 A103 A102 6 SCREWS K101 K102 K103 – 37 –...

  • Page 38: Chassis And Cabinet Replacement Parts List

    : Metal Film OMF : Oxide Metal Film : Variable Resistor : Fusible Resistor (All CD and PF capacitors are ±5%, 50V and all resistors, ±5%, 1/6W unless otherwise noted.) Models :40WH08G, 40WH08B Location Location Part No. Description Part No.
  • Page 39 TERMINAL VIEW OF TRANSISTORS 2SD2253 2SC3852 2SC752GTM 2SC752 2SA1788 2SD1763A (old) 2SC2482 2SA562TM 2SC5243 2SC1569 2SA1015 2SC2655 2SC4544 2SC1815 2SC4721P 2SA1788 2SC2878 2SA1306 2SC1740S 2SA1186A 2SC2120 2SA9335 RN2203 2SD1554 ON4409 2SD2253 RN2201 RN2004 2SD1556 RN1203 2SC5143 RN1204 2SD2553 2SC5144 RN2204 RN1205 RN1202 RN1201...
  • Page 40 FILE NO. 033-200205 SERVICE MANUAL COLOUR TELEVISION C00S Chassis 32ZP18Q – SUMMARY – 32ZP18Q is the same as 32ZP18P except for the parts tabled on back of this sheet. Use this service manual together with the original service manual of 36ZP18P, 32ZP18P (File No.
  • Page 41 Transistor, 2SC4081T106Q 32ZP18Q QT11 23009114 IC, BD4746G-TR Y106 23565499 Owner’s Manual, Portuguese, QT12 23314994 Transistor, 2SA1576AT106 32ZP18Q QT13 23314994 Transistor, 2SA1576AT106 Y131 23565569 QSUG QT14 23314994 Transistor, 2SA1576AT106 QT15 23314994 Transistor, 2SA1576AT106 TOSHIBA CORPORATION 1-1, SHIBAURA 1-CHOME, MINATO-KU, TOKYO 105-8001, JAPAN...
  • Page 42 SCHEMATIC DIAGRAM MODEL : 36ZP18P / 32ZP18P 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 43 SCHEMATIC DIAGRAM MODEL : 36ZP18P / 32ZP18P 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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