Toshiba 32Z23B Service Manual
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Toshiba 32Z23B Service Manual

Toshiba 32Z23B Service Manual

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FILE NO. 033-200222
SERVICE MANUAL
COLOUR TELEVISION
Z23B Chassis
32Z23B , 28Z23B
– SUMMARY –
32Z23B, 28Z23B are the same as 32Z23G except for the parts tabled on back of this sheet.
Use this service manual together with the original service manual of 32Z23G, 28Z23G (File
No. 030-200216).
PUBLISHED IN JAPAN, Jul., 2002 So

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  • Page 1 Z23B Chassis 32Z23B , 28Z23B – SUMMARY – 32Z23B, 28Z23B are the same as 32Z23G except for the parts tabled on back of this sheet. Use this service manual together with the original service manual of 32Z23G, 28Z23G (File No. 030-200216).
  • Page 2 CF, 560 ohm U902 23787678 SIGNAL Board, PD0720A (32Z23B) U902 23787680 SIGNAL Board, PD0720C (28Z23B) U903 23787674 POWER & DEF Board, PD0721A (32Z23B) U903 23787677 POWER & DEF Board, PD0721D (28Z23B) * Y101 23565660 Owner’s Manual, English, 32Z23B/28Z23B Y131 23589236 QSUG...
  • Page 3 FILE NO. 030-200216 SERVICE MANUAL COLOUR TELEVISION Z23B Chassis 32Z23G , 28Z23G 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 ..............................6 DESIGN MODE ................................ 9 ELECTRICAL ADJUSTMENTS ..........................10 CIRCUIT CHECK ..............................12 CHAPTER 2 SPECIFIC INFORMATIONS SETTING & ADJUSTING DATA ..........................13 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 PRE- CAUTION” 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 ous X-RAY RADIATION.

  • Page 6: Set-Up 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. 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 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: Service Mode

    SERVICE MODE 1. ENTERING TO SERVICE MODE 3) While pressing the o button, 2) Press o button again to 1) Press o button once on keep pressing. press MENU button on TV set. Remote Control. Item Data Mute or (Service mode display) 2.
  • Page 9 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 13) 5.
  • Page 10 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 11: 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”, “OPT1”...

  • Page 12: 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 13 ITEM ADJUSTMENT PROCEDURE WHITE BALANCE 1. Set Contrast to 40, and brightness to +20 by picture control. ADJUSTMENT 2. Receive the Black and White pattern. 3. Select RCUT, GCUT and BCUT with CHANNEL s, t buttons, to set individual • CUTOFF ADJUSTMENT values to Initial reference data, and to set GDRV and BDRV to Initial reference (RCUT)

  • Page 14: 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 15: Chapter 2 Specific Informations

    CHAPTER 2 SPECIFIC INFORMATIONS SETTING & ADJUSTING DATA SAFETY INSTRUCTIONS 32”, 28” HIGH VOLTAGE AT ZERO BEAM: 31.9 kV MAX HIGH VOLTAGE: 34.0 kV AC VOLTAGE 220~240 V Table-1 SERVICE MODE ADJUSTING ITEMS AND DATAS IN THE SERVICE MODE: Item Item Adjustment Reference data...

  • Page 16: Location Of Controls

    LOCATION OF CONTROLS Front REMOTE SENSOR ON-TIMER INDICATOR (GREEN) POWER INDICATOR (RED) MAIN SWITCH POSITION UP VIDEO-3 POSITION DOWN VOLUME UP HEAD PHONE VOLUME DOWN MENU Rear terminals AERIAL TERMINAL VIDEO-2 (21PIN S-VIDEO/AV) AUDIO OUT (FIXED) VIDEO-1 (21PIN S-VIDEO/AV) – 14 –...
  • Page 17 Remote Controller DISPLAY CALL/INDEX (TEXT) MUTE F/VTR CALL VCR CONTROL SELECTION ON/STAND-BY POSITION NUMBER KEYS TEN KEYS -/-- POSITION SELECT VIDEO INPUT SINGLE DIGIT/DOUBLE DIGIT FLOF KEYS TEXT TEXT MODE PICTURE MENU SELECT OPTION ENTER – VOLUME/ADJUST LEVEL POSITION UP/DOWN SELECT MENU OPTION MENU EXIT...

  • Page 18: 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 19 Location Location Parts No. Description Parts No. Description * C440 24503275 MT PLA CAP T 1500VH 802H C639 24796102 ELECTROLYTIC, 35V 1000UF M C442 24082913 PLASTIC FILM, 315V 0.20UF J C641 24795470 ELECTROLYTIC, 25V 47UF M * C444 24503349 MT PLA CAP T 1800VH 432H C642 24797100 ELECTROLYTIC, 50V 10UF M...
  • Page 20 Location Location Parts No. Description Parts No. Description C912 24763102 ELECTROLYTIC, 16V 1000UF M CR07 24797010 ELECTROLYTIC, 50V 1UF M C913 24794100 ELECTROLYTIC, 16V 10UF M CR08 24353270 CERAMIC DISC, 50V CH 27PF J C930 24214101 CERAMIC DISC, 500V B 100PF K CV02 24797010 ELECTROLYTIC, 50V 1UF M...
  • Page 21 Location Location Parts No. Description Parts No. Description R229 24366271 CARBON FILM, 1/6W 270 OHM J R435 24366184 CARBON FILM, 1/6W 18OK OHM J R230 24366271 CARBON FILM, 1/6W 270 OHM J R436 24366153 CARBON FILM, 1/6W 15K OHM J R303 24321109 OXIDE METAL FILM, 1/2W 1 OHM J...
  • Page 22 Location Location Parts No. Description Parts No. Description R603 24366103 CARBON FILM, 1/6W 10K OHM J R829 24321159 OXIDE METAL FILM, 1/2W 1.5 OHM J R612 24366681 CARBON FILM, 1/6W 680 OHM J R841 24531120 FUSIBLE, 1/2W 12 OHM J R613 24366681 CARBON FILM, 1/6W 680 OHM J...
  • Page 23 Location Location Parts No. Description Parts No. Description RA13 24366102 CARBON FILM, 1/6W 1K OHM J RR03 24366103 CARBON FILM, 1/6W 10K OHM J RA14 24366331 CARBON FILM, 1/6W 330 OHM J RR04 24366333 CARBON FILM, 1/6W 33K OHM J RA16 24366331 CARBON FILM, 1/6W 330 OHM J...
  • Page 24 TRANSFORMER, FOCUS, TLN2168AH Q602 23114623 TRANSISTOR, 2SC2878-A(TEM * T401 23224373 TRANSFORMER, HORIZ DRVE, TLN1100AM Q603 23114478 TRANSISTOR, RN2004 * T461 23236761 FBT 30KV 32Z23B BODY HF, TFB4164CH Q604 23314791 TRANSISTOR, 2PA1015Y T461A 23192941 ANODECAP ASSEMBLY, TCCP5158 Q608 23318814 IC, TA8211AH T461B 23501175...
  • Page 25 Location Location Parts No. Description Parts No. Description Q613 23314794 TRANSISTOR, VCEO=50V TO-92, 2PC1815Y D110 23357354 DIODE, MA2C858 Q618 23114623 TRANSISTOR, 2SC2878-A(TEM D190 23316755 DIODE, ZENER, MTZJ33C Q619 23114623 TRANSISTOR, 2SC2878-A(TEM D224 23115599 DIODE, 1N4148 Q671 23114623 TRANSISTOR, 2SC2878-A(TEM D240 23115599 DIODE, 1N4148 Q673...
  • Page 26 Location Location Parts No. Description Parts No. Description D818 23316738 DIODE, ZENER, MTZJ22B KB01 23000852 IC, REMOCON RECEIVER, PIC-37043TE2 D828 23115599 DIODE, 1N4148 P661 23363607 JACK, HEAD PHONE, 3.5MM D842 23316724 DIODE, ZENER, MTZJ15A * P801 23372052 POWER CORD, 250V2.5A D844 23316715 DIODE, ZENER, MTZJ11A...
  • Page 27 Location Location Parts No. Description Parts No. Description Y101F 23565692 OWNER’S MANUAL, PORTUGUES, 32Z23G/28Z23G Y101G 23565693 OWNER’S MANUAL, SWEDISH, 32Z23G/28Z23G Y101H 23565694 OWNER’S MANUAL, FINNISH, 32Z23G/28Z23G Y101J 23565695 OWNER’S MANUAL, DUTCH, 32Z23G/28Z23G Y101K 23565696 OWNER’S MANUAL, POLISH, 32Z23G/28Z23G Y101L 23565697 OWNER’S MANUAL, HUNGARIAN, 32Z23G/28Z23G Y101M 23565698...
  • Page 28 THIS PAGE IS INTENTIONALLY LEFT BLANK. – 26 –...

  • Page 29: Pc Boards Bottom View

    SIGNAL BOARD PD0720D BOTTOM (FOIL) SIDE – 27 – – 28 –...
  • Page 30 POWER/DEF BOARD PD0721C BOTTOM (FOIL) SIDE – 29 – – 30 –...
  • Page 31 CRT-D/DSM BOARD PD0014D BOTTOM (FOIL) SIDE – 31 –...
  • Page 32 AV BOARD PD0723B-2 BOTTOM (FOIL) SIDE INDICATOR BOARD PD0723B-1 BOTTOM (FOIL) SIDE CONT-1 BOARD PD0515C (32") CONT-1 BOARD PD0722A (28") BOTTOM (FOIL) SIDE – 32 –...

  • Page 33: Terminal View Of Transistors

    TERMINAL VIEW OF TRANSISTORS 2SD2253 2SC3852 2SC752GTM 2SC752 2SA1788 (old) 2SD1763A 2SA562TM 2SC2482 2SC1569 2SC5243 2SC2655 2SA1015 2SC5570 2SC4544 2SC4721P 2SC1815 2SA1788 2SC2878 2SA1306 2SC1740S 2SA1186A 2SC2120 2SA9335 ON4409 RN2203 2SD1554 RN2201 2SD2253 2SD1556 RN2004 RN1203 2SC5143 RN1204 2SD2553 RN2204 RN1205 RN1202 RN1201...
  • Page 34 THIS PAGE IS INTENTIONALLY LEFT BLANK. – 34 –...
  • Page 35 SCHEMATIC DIAGRAM MODEL : 32Z23G / 28Z23G 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 36 – 36 –...

  • Page 37: Circuit Block Diagram

    SPECIFICATIONS (Representative: 32Z23G) Input Power Rating: AC 220 ~ 240 Volts Aerial Input Impedance: 75 ohm unbalanced type for VHF, UHF and CATV Receiving Channels: System Channel CATV PAL I 21 ~ 69 PAL, /60 Hz (For Video Disk play back) 4.43 NTSC (For VCR playback), 3.58 NTSC (For VCR playback) Intermediate Frequencies: Picture I-F carrier frequency ....
  • Page 38 SCHEMATIC DIAGRAM MODEL : 32Z23G / 28Z23G 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 39 – 36 –...
  • Page 46 ZP83 23144536 PROTECTOR PRF 1000...
  • Page 47 TOSHIBA CORPORATION 1-1, SHIBAURA 1- CHOME, MINATO-KU, TOKYO 105-8001, JAPAN...

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