Panasonic TX-28LDP4F Service Manual
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Panasonic TX-28LDP4F Service Manual

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TX-28LDP4F Service Manual
Safety
Specifications
Parts List
Service
Information
Adjustments
Self Check
Service Hints
Mechanical
View
Disassembly
Location of
Controls
Waveforms
Block Diagrams
Schematic Diagrams
PCB Views
Service Support
Service and repair of
this product is
supported by
Panasonic's LUCI
interface.
This interface provides a
link between the TV and
a standard PC to allow a
number of diagnostic
and control functions to
be performed.
For more details contact
your local Panasonic
company.
EXIT
BACK

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Summary of Contents for Panasonic TX-28LDP4F

  • Page 1 TX-28LDP4F Service Manual Safety Service Support Specifications Service and repair of Block Diagrams this product is Parts List supported by Panasonic's LUCI Service interface. Information This interface provides a Adjustments link between the TV and a standard PC to allow a...
  • Page 2 Audio Control Dolby Power supply Video BACK E - Schematic H - Schematic E - PCB K - PCB K - Schematic N - Schematic Y - PCB Y - Schematic BACK BACK...
  • Page 3 ORDER No. SM-98036 Colour Television TX-28LDP4F EURO4 Chassis SPECIFICATIONS TECHNISCHE DATEN Power Source: 220-240V AC, 50Hz Netzpannung: 220-240V AC, 50Hz Power Consumption: Leistungsaufnahme: Aerial Impedance: 75Ω unbalanced, Coaxial Type Antennenimpedanz: 75Ω asymmetrisch, Koaxial-Typ Standby Power Consumption: 1,8W Standby Leistungsaufnahme: 1,8W...

  • Page 4: Table Of Contents

    CONTENTS INHALT SAFETY PRECAUTIONS ............ 2 SICHERHEITSVORKEHRUNGEN ........2 SERVICE HINTS ..............4 SERVICE HINWEISE ............4 SERVICE MODE ..............5 ABGLEICHVERFAHREN............. 6 SELF CHECK ..............7 SELBSTDIAGNOSE ............7 ADJUSTMENT PROCEDURE ..........8 ABGLEICH ................8 WAVEFORM PATTERN TABLE .......... 9 SIGNAL TABELLE...............
  • Page 5 LEAKAGE CURRENT HOT CHECK MESSUNG DES KRIECHSTROMS IM EINGESCHALTETEN ZUSTAND Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check. Den Netzstecker direkt in eine Netsteckdose stecken. Connect a 2kΩ 10W resistor in series with an Für diese Messung keinen Trenntransformator exposed metallic part on the receiver and an earth, verwenden.

  • Page 6: Service Hints

    SERVICE HINTS SERVICE HINWEISE HOW TO REMOVE THE REAR COVER ENTFERNEN DER GERÄTERÜCKWAND Remove the 16 screws as shown in Fig.2. Die 16 Schrauben entfernen, siehe Abb.2. Screws Schrauben Fig.2. Abb.2. LOCATION OF CONTROLS LAGE DER EINSTELLREGLER Y - Board K - Board Focus Fokusregler...

  • Page 7: Service Mode

    SERVICE MODE The remote control is used for entering and storing adjustments, with the exception of Cut-off adjustments, which must always be done prior to service adjustment. Perform adjustments in accordance with screen display. The display on the screen also specifies the CCU variants as well as the approx. setting values. The adjustment sequence for the service mode is indicated below.

  • Page 8: Abgleichverfahren

    ABGLEICHVERFAHREN Die Fernbedienung dient zum Eingeben und Abspeichern der Einstellwerte, mit Ausnahme der Sperrpunkteinstellung, die grundsätzlich vor den hier beschriebenen Einstellungen vorgenommen werden muss. Die Einstellungen erfolgen entsprechend dem Bildschirm-Display. Auf dem Bildschirm-Display erscheinen die ungefähren Einstellwerte. Die Einstellfolge für den Service-Modus ist nachstehend beschrieben. Um in den Service-Mode zu gelangen, gehen sie Die einzelnen Funktionen mit Hilfe der ROTEN und GRÜNEN Taste anwählen.

  • Page 9: Self Check

    SELF CHECK SELBSTDIAGNOSE Self-check is used to automatically check the bus Die Selbstdiagnose dient zum automatischen Prüfen lines and hexadecimal code of the TV set. der Bus-Leitungen sowie des Hexadezimalcodes des FS-Geräts. Zum Umschalten auf Selbstdiagnose To get into the Self-Check mode press the down zunächst die Taste "STATUS"...

  • Page 10: Adjustment Procedure

    ADJUSTMENT PROCEDURE Item/Preparation Adjustments +B SET-UP Set the +B voltage up as follows:- Adjust R811 so that B2 shows 148V±1V Receive a Greyscale signal. Confirm the following voltages. Set the controls:- ± 0,25V B10 5 ± 0,25V Brightness Minimum ± 0,5V B11 33 ±...

  • Page 11: Waveform Pattern Table

    WAVEFORM PATTERN TABLE SIGNAL TABELLE Vert Drive VFLB Vert Out IC451 Pin 2 IC451 Pin 3 IC601 Pin 31 20mS 20mS 20mS H - Out H - Out H - Pulse IC601 Pin 50 IC701 Pin 5 Base Q503 64µS 64µS 64µS HFLB...

  • Page 12: Alignment Settings

    ALIGNMENT SETTINGS (The figures below are nominal and used for representative purposes only.) Alignment Function Settings / Special features H-Pos Horizontal Position Optimum setting. V-Pos Vertical Position Optimum setting. H-Amp Horizontal Amplitude Optimum setting. V-Amp Vert. Amplitude Optimum setting. E/W-Amp1 EW-amplitude Optimum setting.

  • Page 13: Abgleichtabelle

    ABGLEICHTABELLE (Die angegebenen Werte sind Mittelwerte und Können individuell nach oben oder unten nach dem korrekten Abgleich abweichen.) Abgleichfunktion Einstellung / Besondere Merkmale H-Pos Horizontale position Optimale Einstellung. V-Pos Vertikale Position Optimale Einstellung. H-Amp Horizontale Amplitude Optimale Einstellung. V-Amp Vertikale Amplitude Optimale Einstellung.

  • Page 14: Block Diagrams

    VIDEO BLOCK DIAGRAM BILDSIGNAL BLOCKSCHEMA Y - BOARD E - BOARD Q906 Q908 COILS Q905 Q907 Q909 IC601 61 V IN 1 Q950 Q951 TUNER Q104 IC351 SVM OUT 34 VIDEO PROCESSOR B OUT 39 Q353 Q305 Q306 43 B IN Q105 OUTPUT 42 G IN...
  • Page 15 AUDIO BLOCK DIAGRAM TONSIGNAL BLOCKSCHEMA E - BOARD IC2101 AUDIO To K3 PROCESSOR I2S_DA_IN_2 18 I2S_DA_IN_2 I2S_DA_IN_1 12 I2S_DA_IN_1 I2S_DA_OUT 11 I2S_DA_OUT I2S_WS 10 I2S_WS I2S_CL 9 I2S_CL TUNER 44 MONO IN DACM_R 24 Q2102 IC251 Q252 AUDIO OUTPUT Q103 DACM_L 25 L 11 Q2103...
  • Page 16 DOLBY BLOCK DIAGRAM DOLBY BLOCKSCHEMA K - BOARD To E12 I2S_DA_OUT_2 JK2401 IC2401 Q2405 Q2406 Q2403 Surround R I2S_DA_OUT_1 DOLBY Q2404 Q2419 PROCESSOR Q2401 Q2402 I2S_DA_IN Surround L Q2418 I2S_WS Centre Out Q2409 I2S_CL Q2417 Right Front Q2410 IC2402 Q2421 Left Front OPERATIONAL AMPLIFIER...
  • Page 17 CONTROL BLOCK DIAGRAM STROMVERSORGUNGS BLOCKSCHEMA E - BOARD H - BOARD TUNER IC3401 L/L’ POS/NEG VIDEO IC2101 SWITCHING AUDIO Q3401 IC601 SDA 1 PROCESSOR VIDEO PROCESSOR SCL 1 SERVICE / TEST K - BOARD SDA 1 IC2401 SCL 1 DOLBY PROCESSOR SDA 2 SCL 2...
  • Page 18 POWER SUPPLY BLOCK DIAGRAM STROMVERSORGUNGS BLOCKSCHEMA E - BOARD 5V SBY Q852 D867 Q855 D868 Q853 Q854 IC251 AUDIO D862 T802 RL801 OUTPUT R854 T801 D801 Line Y - BOARD Filter 150V D850 IC351 R802 T551 Q850 DEGAUSS COIL OUTPUT TUNER 200V IC801...

  • Page 19: Parts Location

    PARTS LOCATION EXPLOSIONSZEICHNUNG NOTE: Anmerking: The numbers on the exploded view below Die Nummer auf den mechanischen Teilen refer to the mechanical section of the Zeigt die Bezugsnummer der Ersatzteilliste Replacement Parts List.

  • Page 20: Replacement Parts List

    SPEAKER IC851 L78M12MRB 12V REGULATOR ENG29505G TUNER IC852 L78M09MRB 9V REGULATOR EUR511200 REMOTE CONTROL IC853 AN78L08TA 8V REGULATOR TBM8E1728 PANASONIC BADGE IC1071 RPM6937-V4 LED RECEIVER TBX8E050 POWER BUTTON IC1101 SDA5450C48 MICRO PROCESSOR TKP8E1223 DOOR LID IC1102 27C2001-F17 EPROM * TKP8E1233...
  • Page 21 Cct Ref Parts Number Description Cct Ref Parts Number Description Q102 BC847B TRANSISTOR D603 DAN217T146 DIODE D605 DAN212KT146 DIODE Q104 BC847B TRANSISTOR D606 MA165TA5 DIODE Q105 BC847B TRANSISTOR D607 MA4051 DIODE Q251 2SD1328STX TRANSISTOR D609 1SR124-4AT82 DIODE Q252 2SD1328STX TRANSISTOR D615 STZ6.2NT146 DIODE...
  • Page 22 Cct Ref Parts Number Description Cct Ref Parts Number Description Q2422 BC847B TRANSISTOR FILTERS Q2423 BC857B TRANSISTOR L804 ELF18N010A LINE FILTER Q2424 BC847B TRANSISTOR CRYSTALS Q2425 BC857B TRANSISTOR X601 4730007267 CRYSTAL Q2429 BC857B TRANSISTOR X1101 TAF10020 CRYSTAL Q2430 BC847B TRANSISTOR X1101 TSSA121 CRYSTAL...
  • Page 23 Cct Ref Parts Number Description Cct Ref Parts Number Description JA59 ERJ8GEY0R00 S.M.CARB .125W R351 ERJ6GEYJ302 S.M.CARB 0.1W ERJ8GEY0R00 S.M.CARB .125W R352 ERJ6GEYJ302 S.M.CARB 0.1W JA56 ERJ8GEY0R00 S.M.CARB .125W R353 ERJ6GEYJ302 S.M.CARB 0.1W ERJ8GEY0R00 S.M.CARB .125W R354 ERJ6GEYJ102 S.M.CARB 0.1W JA43 ERJ8GEY0R00 S.M.CARB...
  • Page 24 Cct Ref Parts Number Description Cct Ref Parts Number Description R613 ERJ6GEYJ152 S.M.CARB 0.1W R916 ERJ6GEYJ391 S.M.CARB 0.1W R622 ERJ6GEY0R00 S.M.CARB 0.1W R919 ERQ14AJW390 FUSIBLE 0.25W R636 ERJ6GEYJ750 S.M.CARB 0.1W R920 ERQ14AJW390 FUSIBLE 0.25W R645 ERJ6GEYJ103 S.M.CARB 0.1W R921 ERD25TJ471 CARBON 0.25W R647...
  • Page 25 Cct Ref Parts Number Description Cct Ref Parts Number Description R1157 ERJ6GEYJ103 S.M.CARB 0.1W R2416 ERJ6GEYJ472 S.M.CARB 0.1W R1158 ERJ6GEYJ101 S.M.CARB 0.1W R2417 ERJ6GEYJ821 S.M.CARB 0.1W R1159 ERJ6GEY0R00 S.M.CARB 0.1W R2418 ERJ6GEY0R00 S.M.CARB 0.1W R1160 ERJ6GEYJ223 S.M.CARB 0.1W R2419 ERJ6GEYJ470 S.M.CARB 0.1W R1161...
  • Page 26 Cct Ref Parts Number Description Cct Ref Parts Number Description R2517 ERJ6GEYJ273 S.M.CARB 0.1W R3408 ERJ6GEYJ472 S.M.CARB 0.1W R2518 ERJ6GEYJ183 S.M.CARB 0.1W R3409 ERJ6GEYJ750 S.M.CARB 0.1W R2519 ERJ6GEYJ103 S.M.CARB 0.1W R3601 ERJ6GEYJ101 S.M.CARB 0.1W R2523 ERJ6GEYJ681 S.M.CARB 0.1W R3602 ERJ6GEYJ101 S.M.CARB 0.1W R2524...
  • Page 27 Cct Ref Parts Number Description Cct Ref Parts Number Description 2.2nF 10µF C458 ECQB1222JF3 FILM 100V C703 ECEA1HGE100 ELECT 2.2nF 22nF C459 222236516154 FILM 160V C704 ECQB1H223K FILM 27pF 2.2nF C461 ECCR2H270J CERAMIC 500V C705 ECQB1H222J FILM 1µF 470nF C508 ECQV1H105JZ FILM C804...
  • Page 28 Cct Ref Parts Number Description Cct Ref Parts Number Description 100nF 10µF C1117 ECJ2VF1H104Z ELECT 350V C2411 ECUV1H221JX S.M. CAP 10nF 470pF C1118 ECUV1H103KBX S.M. CAP C2412 ECUV1H471KBX S.M. CAP 220pF C1119 ECUV1H221JCX S.M. CAP C2413 ECUV1H102KBX S.M. CAP 100nF C1120 ECJ2VF1H104Z ELECT...
  • Page 29 Cct Ref Parts Number Description Cct Ref Parts Number Description 2.2nF C3009 ECUV1H222JCX S.M. CAP 47µF C3010 ECA1CM470GB ELECT 560pF C3012 ECUV1H561JCX S.M. CAP 470nF C3013 ECJ3VB1C474K ELECT 3.5KV 2.2nF C3014 ECUV1H222JCX S.M. CAP 2.2nF C3015 ECUV1H222JCX S.M. CAP 2.2nF C3016 ECUV1H222JCX S.M.

  • Page 30: Schematic Diagrams

    SCHEMATIC DIAGRAMS FOR MODEL ZEICHENERKLÄRUNG FÜR MODELL TX-28LDP4F TX-28LDP4F (EURO-4 CHASSIS) (EURO-4 CHASSIS) IMPORTANT SAFETY NOTICE WICHTIGER SICHERHEITSHINWEIS Components identified by mark have special Teile, die mit einen Hinweis gekennzeichnet sind, characteristics important for safety. When replacing any of sind wichtig für die Sicherheit, Sollte ein Auswechsein these components, use only manufacturer's specified parts.
  • Page 36 CONDUCTOR VIEWS ANSICHT DER LEITERBAHNEN E - BOARD TNP8EE009 TRAN’S DIODES D558 Q3601 L8 D3103 B7 D557 Q3007 M9 D3101 B7 D556 Q3001 N8 D3102 B7 D555 Q3006 N10 D2161 G9 D554 Q2304 I7 D2105 G10 D553 Q2303 M6 D2104 F9 D552 Q2301 I7 D2103 G10...
  • Page 37 Y - BOARD TNP8EY012 TRANSISTORS Q909 Q908 Q907 Q906 Q905 Q354 Q353 Q352 Q351 DIODES D906 D905 D904 D902 D901 D364 D363 D362 D361 D360 D359 D358 D357 D356 D355 D354 TEST POINTS TPY6 B8 TPY5 D5 TPY4 E5 TPY3 F6 TPY2 E7 TPY1 G6 IC’S...
  • Page 38 K - BOARD TNP8EK005 TRAN’S Q2432 Q2431 Q2430 Q2429 Q2428 Q2427 Q2426 Q2425 Q2424 Q2423 Q2422 Q2421 Q2420 Q2419 Q2418 Q2417 Q2416 Q2410 Q2409 Q2407 Q2406 Q2405 Q2404 Q2403 Q2402 Q2401 IC’S IC2404 IC2403 IC2402 IC2401 DIODES D2409 D2408 D2406 D2405 D2402 D2401...
  • Page 39 NOTES...

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