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Toshiba 28ZH46P Service Manual

Zh47 chassis
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SERVICE MANUAL
Colour Television
FILE NO. 030-200405
( T E N T AT I V E )
ZH47 Chassis
28ZH46P
32ZH46P
Published in Japan, Jun. 2004 (YC)

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  • Page 1 FILE NO. 030-200405 ( T E N T AT I V E ) SERVICE MANUAL Colour Television ZH47 Chassis 28ZH46P 32ZH46P Published in Japan, Jun. 2004 (YC)

  • Page 2: 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 3: Safety Instructions

    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: 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 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 5 (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 6: Service Mode

    SERVICE MODE 1. ENTERING TO SERVICE MODE 1) Press button once on 2) Press button again to 3) While pressing the button, Remote Control. keep pressing. press MENU button on TV set. Item Data (Service mode display) 2. DISPLAYING THE ADJUSTMENT MENU Press MENU button on TV to switch between screens.
  • Page 7 4. SELECTING THE ADJUSTING ITEMS 1) Every pressing of CHANNEL button in the service mode changes the adjustment items in the order of table-2. button for reverse order) Refer to Table-2 for preset data of adjustment mode. (See SETTING & ADJUSTING DATA on page 13) 5.
  • Page 8 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 9: Design Mode

    DESIGN MODE 1. ENTERING TO DESIGN MODE 3) Press MENU button on TV set. 1) Select the Service mode. 2) While pressing (or CALL) button on Remote and press MENU button on TV. ITEM Press DATA Press (Design mode) (Adjustment mode) When QA01 is initialized, items “OPT0”...
  • Page 10 SERVICE MODE ADJUSTMENTS ITEM ADJUSTMENT PROCEDURE * For models without internal pattern generator , use external signal generator 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.
  • Page 11 ITEM ADJUSTMENT PROCEDURE WHITE BALANCE 1. Set Contrast to 40, and brightness to +20 by picture control. ADJUSTMENT 2. Set the TV in service mode, and get the inside W/B adjusting signal with VIDEO button. • CUTOFF ADJUSTMENT 3. Select RCUT, GCUT and BCUT with CHANNEL buttons, to set individual (RCUT) values to 32, and to set GDRV and BDRV to 20 with VOLUME...

  • Page 12: 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 13 - 13 -...

  • Page 14: Location Of Controls

    LOCATION OF CONTROLS Front GREEN – On timer is set RED – Power On Power Button Back SCART1 (EXT1) SCART2 (EXT2) - 14 -...
  • Page 15 OK to confirm your selection Teletext control buttons Virtual Dolby Surround Dynamic Sub Bass To select mode To mute the sound When using a TOSHIBA VCR or DVD: When in television mode: press to PAUSE Still picture press to EJECT...

  • Page 16: 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 : 28ZH46P/32ZH46P Capacitors ..... CD Ceramic Disk : Plastic Film : Electrolytic Resistors ....
  • Page 17 Location Location Parts No. Description Parts No. Description C457 24100104 CERAMIC CHIP, 25V F 0.1UF Z C552 24797479 ELECTROLYTIC, 50V 4.7UF M C458 24109103 CERAMIC CHIP, 50V B 0.01UF K C553 24100104 CERAMIC CHIP, 25V F 0.1UF Z C459 24109103 CERAMIC CHIP, 50V B 0.01UF K C556 24100104...
  • Page 18 Location Location Parts No. Description Parts No. Description C688 24797478 ELECTROLYTIC, 50V 0.47UF M CA07 24100104 CERAMIC CHIP, 25V F 0.1UF Z C689 24590102 PLASTIC FILM, 50V 1000PF J CA08 24100104 CERAMIC CHIP, 25V F 0.1UF Z C690 24590102 PLASTIC FILM, 50V 1000PF J CA09 24108330 CERAMIC CHIP, 50V SL 33PF J...
  • Page 19 Location Location Parts No. Description Parts No. Description R209 24366103 CARBON FILM, 1/6W 10K OHM J R424 24366751 CARBON FILM, 1/6W 750 OHM J R211 24366473 CARBON FILM, 1/6W 47K OHM J R425 24552182 OXIDE METAL FILM, 1/2W 1.8K OHM J R217 24366392 CARBON FILM, 1/6W 3.9K OHM J...
  • Page 20 Location Location Parts No. Description Parts No. Description R507 24011102 CHIP, METAL FILM, 1/20W 1K OHM J R725 24366821 CARBON FILM, 1/6W 820 OHM J R511 24011102 CHIP, METAL FILM, 1/20W 1K OHM J R730 24552100 OXIDE METAL FILM, 1/2W 10 OHM J R514 24011101 CHIP, METAL FILM, 1/20W 100 OHM J...
  • Page 21 Location Location Parts No. Description Parts No. Description R942 24366392 CARBON FILM, 1/6W 3.9K OHM J RA53 24011103 CHIP, METAL FILM, 1/20W 10K OHM J R943 24366392 CARBON FILM, 1/6W 3.9K OHM J RA55 24011472 CHIP, METAL FILM, 1/20W 4.7K OHM J R944 24366392 CARBON FILM, 1/6W 3.9K OHM J...
  • Page 22 Location Location Parts No. Description Parts No. Description COIL & TRANSFORMERS LA74 23238714 COIL, PEAKING, TRF4100AJ L101 23221803 COIL, CHOKE, TLN3040D LA75 23238714 COIL, PEAKING, TRF4100AJ L102 23103828 INDUCTOR, BEAD, TEM2121M LC01 23103828 INDUCTOR, BEAD, TEM2121M L103 23238562 COIL, PEAKING, TRF4109AJ LC02 23103828 INDUCTOR, BEAD, TEM2121M...
  • Page 23 Location Location Parts No. Description Parts No. Description Q681 70114396 TRANSISTOR, 2SC3326B D336 23118529 DIODE, ZENER, RD5.6ES B2 Q682 70114396 TRANSISTOR, 2SC3326B D337 23118529 DIODE, ZENER, RD5.6ES B2 Q683 70114396 TRANSISTOR, 2SC3326B D370 23357366 DIODE, FR105-B5 Q684 70114396 TRANSISTOR, 2SC3326B D371 23357366 DIODE, FR105-B5...
  • Page 24 Location Location Parts No. Description Parts No. Description DA34 23316231 DIODE, 1SS355 P801 23372052 POWER CORD, 250V2.5A DA70 23357250 DIODE, ZV=3.01-3.22 DZ3.0 BS B 23372151 POWER CORD, AC250V3A L/FUSE13A GB13F1 FUSE13A DA71 23118627 RD3.9ESA B2 P801A 23368013 CONNECTOR, PLUG, 2P 11.88MM W VT-JST DB01 23358598 LED, LAMP RED SMALL 3.1MM SLR-343VCT32...
  • Page 25 REMOCON HAND UNIT IR, CTVPAL CT-90101 Y101A 23566305 OWNERS MANUAL, ENGLISH ZH46/47 Y101E 23566306 OWNERS MANUAL, EURO ZH46/47 CABINET PARTS A201S #1 23532697 COVER, FORNT COVER S 28ZH46P #2 23532695 COVER, FRONT COVER S 32ZH46P A231 23445817 BUTTON, POWER BUTTON 28ZH46P A241 70368125 PUSH CATCH...
  • Page 26 SIGNAL BOARD (28ZH46P:PD1752A 32ZH46P:PD1752C) (U902) BOTTOM (FOIL) SIDE RV48 RV41 R685 R676 R675 C105 R673 R682 RV40 RV47 QV11 RC06 R204 RV33 RV21 RV30 R455 R431 C433 R455 CAUTION C430 CV21 R432 Q422 R436 LIVE AREA R437 R451 R451 R439...
  • Page 27 SIGNAL BOARD (28ZH46P:PD1752A 32ZH46P:PD1752C) (U902) TOP (COMPONENT) SIDE LA75 JP004 Z896 C662 BB21A C655 LA71 D490 R667 R667 QA71 C663 JP001 R490 R690 LA70 C661 D422 DA71 D421 RA53 Q251A RA52 R428 R650 Q830A CA77 RA53 RA14 DA02 C680 R427...
  • Page 28 POW&DEF BOARD (28ZH46P:PD1245C 32ZH46P:PD1245D) (U903) BOTTOM (FOIL) SIDE - 30 - - 31 -...
  • Page 29 S801 C668 P831B RA71 RA72 RA73 LV49 RV84 RV88 C670 RB03 C667 RB04 PA01B RB02 CAUTION AREA P601A P605B C669 QB01 P515B P821B PA02B MCL-437F 23547584 CRT-D BOARD (28ZH46P:PD0491Q 32ZH46P:PD0491R) (U901) BOTTOM (FOIL) SIDE - 32 - - 33 -...

  • Page 30: Terminal View Of Transistors

    TERMINAL VIEW OF TRANSISTORS 2SD2253 2SC3852 2SC752GTM 2SC752 2SA1788 (old) 2SD1763A 2SA562TM 2SC2482 2SC5243 2SC1569 2SC2655 2SA1015 2SC5570 2SC4544 2SC4721P 2SC1815 2SA1788 2SC2878 2SA1306 2SC1740S 2SA1186A 2SC2120 2SA9335 RN2203 2SD1554 ON4409 RN2201 2SD2253 RN2004 2SD1556 2SC5143 RN1203 RN1204 2SD2553 RN2204 RN1205 RN1202 RN1201...
  • Page 31 SCHEMATIC DIAGRAM MODEL : 28ZH46P / 32ZH46P 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 32 - 36 -...
  • Page 33 28ZH46P/32ZH46P SIGNAL (SCART/VIDEO FRONT END) SHEET-1/5 (1/9)
  • Page 34 28ZH46P/32ZH46P SIGNAL (AUDIO PROCESSING AND MUTING) SHEET-2/5 (2/9)
  • Page 35 28ZH46P/32ZH46P SIGNAL (PROCESSOR AND MEMORY) SHEET-3/5 (3/9)
  • Page 36 28ZH46P/32ZH46P SIGNAL (VIDEO BACK-END PROCESSING) SHEET-4/5 (4/9)
  • Page 37 28ZH46P/32ZH46P SIGNAL (POWER SUPPLY AND REGULATION) SHEET-5/5 (5/9)
  • Page 38 28ZH46P/32ZH46P POWER/DEFLECTION (VERTICAL&HORIZONTAL DEFLECTION STAGE) SHEET-1/2 (6/9)
  • Page 39 28ZH46P/32ZH46P POWER/DEFLECTION (POWER STAGE) SHEET-2/2 (7/9)
  • Page 40 28ZH46P/32ZH46P INDICATOR/CONT/AV (8/9)
  • Page 41 2SC1815Y W66QDE991X816:28" W76QFL891X100:32" 2SC1815Y 2SC1815Y 2SC5343Y 2SC5343Y 2SC5343Y 2SC5343Y 2SC1815Y 2SA1980Y 28ZH46P/32ZH46P CRT-D (9/9)
  • Page 42 Specifications Broadcast systems/channels Programme Positions PAL-I UHF UK21-UK69 Stereo Nicam PAL-B/G UHF E21-E69 2 carrier system (IGR) VHF E2-E12, S1-S41 Visible Screen Size (approx.) 28ZH 66cm SECAM-L UHF F21-F69 32ZH 76cm VHF F1-F10, B-Q Display 16:9 SECAM-D/K UHF R21-R69 VHF R1-R12 Sound output (at 10% distortion) Main 5W + 5W Video Input...
  • Page 44 SCHEMATIC DIAGRAM MODEL : 28ZH46P / 32ZH46P 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 45 - 36 -...
  • Page 46 28ZH46P/32ZH46P SIGNAL (SCART/VIDEO FRONT END) SHEET-1/5 (1/9)
  • Page 47 28ZH46P/32ZH46P SIGNAL (AUDIO PROCESSING AND MUTING) SHEET-2/5 (2/9)
  • Page 48 28ZH46P/32ZH46P SIGNAL (PROCESSOR AND MEMORY) SHEET-3/5 (3/9)
  • Page 49 28ZH46P/32ZH46P SIGNAL (VIDEO BACK-END PROCESSING) SHEET-4/5 (4/9)
  • Page 50 28ZH46P/32ZH46P SIGNAL (POWER SUPPLY AND REGULATION) SHEET-5/5 (5/9)
  • Page 51 28ZH46P/32ZH46P POWER/DEFLECTION (VERTICAL&HORIZONTAL DEFLECTION STAGE) SHEET-1/2 (6/9)
  • Page 52 28ZH46P/32ZH46P POWER/DEFLECTION (POWER STAGE) SHEET-2/2 (7/9)
  • Page 53 28ZH46P/32ZH46P INDICATOR/CONT/AV (8/9)
  • Page 54 2SC1815Y W66QDE991X816:28" W76QFL891X100:32" 2SC1815Y 2SC1815Y 2SC5343Y 2SC5343Y 2SC5343Y 2SC5343Y 2SC1815Y 2SA1980Y 28ZH46P/32ZH46P CRT-D (9/9)

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