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Panasonic TX-28MD4C Service Manual
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Panasonic TX-28MD4C Service Manual

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TX-28/25/21MD4C Service Manual
Safety
Specifications
Parts List
Service
Information
Adjustments
Self Check
Service Hints
Mechanical
View
Disassembly
Location of
Controls
Waveforms
All manuals and user guides at all-guides.com
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
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Summary of Contents for Panasonic TX-28MD4C

  • Page 1 PC to allow a Schematic Diagrams Self Check number of diagnostic and control functions to Service Hints be performed. Mechanical For more details contact View your local Panasonic Disassembly company. PCB Views Location of Controls EXIT BACK Waveforms...
  • Page 2 all-guides.
  • Page 3 All manuals and user guides at all-guides.com Audio Control Power supply Video BACK E - Schematics H - Schematic E - PCB Y - PCBs Y - Schematics BACK BACK...
  • Page 4 All manuals and user guides at all-guides.com ORDER No. SM-98009 Colour Television TX-28MD4C TX-25MD4C TX-21MD4C EURO4 Chassis SPECIFICATIONS TECHNISCHE DATEN (Information in brackets { } refer to TX-25MD4C, [ ] TX-21MD4C) (Werte in klammern gelten { } nur fur TX-25MD4C, [ ] TX-21MD4C)

  • Page 5: Table Of Contents

    All manuals and user guides at all-guides.com 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 ................
  • Page 6 NOTE : It is important to use an accurate Helligkeit auf Minimum stellen. periodically calibrated high voltage meter. Die Hochspannung messen. Die Anzeige des Set the brightness to minimum. Instrumentes sollte: Measure the high voltage. The meter should indicate: TX-28MD4C 28,5kV ± 1kV. TX-28MD4C 28,5kV ± 1kV. TX-25MD4C 28,2kV ±...

  • Page 7: Service Hints

    All manuals and user guides at all-guides.com SERVICE HINTS SERVICE HINWEISE HOW TO REMOVE THE REAR COVER ENTFERNEN DER GERÄTERÜCKWAND Remove the 9 screws as shown in Fig.2. Die 9 Schrauben entfernen, siehe Abb.2. Screws Schrauben Fig.2. Abb.2. LOCATION OF CONTROLS LAGE DER EINSTELLREGLER Focus Fokusregler...

  • Page 8: Service Mode

    All manuals and user guides at all-guides.com 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.

  • Page 9: Abgleichverfahren

    All manuals and user guides at all-guides.com 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.

  • Page 10: Self Check

    All manuals and user guides at all-guides.com 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 11: Adjustment Procedure

    All manuals and user guides at all-guides.com ADJUSTMENT PROCEDURE Item/Preparation Adjustments +B SET-UP Set the +B voltage up as follows:- Adjust R811 so that B2 shows 148V±1V [130V±1V 1. Receive a Greyscale signal. TX-21MD4C]. Set the controls:- Confirm the following voltages. Brightness Minimum ±...

  • Page 12: Waveform Pattern Table

    All manuals and user guides at all-guides.com WAVEFORM PATTERN TABLE SIGNAL TABELLE VFLB Vert Drive 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...

  • Page 13: Alignment Settings

    All manuals and user guides at all-guides.com 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.

  • Page 14: Abgleichtabelle

    All manuals and user guides at all-guides.com 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.

  • Page 15: Block Diagrams

    All manuals and user guides at all-guides.com VIDEO BLOCK DIAGRAM BILDSIGNAL BLOCKSCHEMA E - BOARD Y - BOARD TX-28MD4C TX-25MD4C Q906 Q908 COILS ONLY TX-28MD4C TX-25MD4C Q905 Q907 Q909 ONLY IC601 61 V IN 1 Q950 Q951 TUNER Q104 IC351...
  • Page 16 All manuals and user guides at all-guides.com AUDIO BLOCK DIAGRAM TONSIGNAL BLOCKSCHEMA E - BOARD TUNER IC251 IC2101 AUDIO AUDIO OUTPUT PROCESSOR DACM_R 24 Q2102 Q252 HEADPHONE DACM_L 25 L 11 Q2103 Q251 SC3_IN_L 37 SC3_IN_R 38 Q101 1 R OUT SC1_OUT_R 30 SC1_IN_R 42 2 R IN...
  • Page 17 All manuals and user guides at all-guides.com CONTROL BLOCK DIAGRAM STROMVERSORGUNGS BLOCKSCHEMA E - BOARD H - BOARD TUNER IC3401 VIDEO IC2101 SWITCHING AUDIO IC601 Q3401 SDA 1 PROCESSOR VIDEO PROCESSOR SCL 1 SERVICE / TEST SDA 1 SCL 1 SDA 2 SCL 2 VPROT...
  • Page 18 All manuals and user guides at all-guides.com POWER SUPPLY BLOCK DIAGRAM STROMVERSORGUNGS BLOCKSCHEMA Q253 E - BOARD 5V SBY Q852 D867 Q855 D868 Q853 Q854 IC251 AUDIO Y - BOARD D862 OUTPUT T802 RL801 R854 T801 IC351 D801 Line T551 Filter OUTPUT 150V...

  • Page 19: Parts Location

    All manuals and user guides at all-guides.com 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

    All manuals and user guides at all-guides.com REPLACEMENT PARTS LIST ERSATZTEILLISTE Important Safety Notice Wichtiger Sicherhitshinweis Components Identified by mark have special Teile, die mit einen Hinweis gekennzeichnet sind characteristics important for safety. wichtig für die Sicherhet. Solite ein Auswechsein When replacing any of these components, use only erfordelrich sein, sind unbdingt Originalteile manufacturers specified parts.
  • Page 21 All manuals and user guides at all-guides.com Cct Ref Parts Number Description Cct Ref Parts Number Description D856 RU4AMLF-M1 DIODE Q1107 BC847B TRANSISTOR D857 MTZJT-775.1C DIODE Q1108 BC847B TRANSISTOR D858 MA165TA5 DIODE Q2101 BC857B TRANSISTOR D859 MA165TA5 DIODE Q2102 BC857B TRANSISTOR Q2103 BC857B...
  • Page 22 All manuals and user guides at all-guides.com Cct Ref Parts Number Description Cct Ref Parts Number Description R113 ERJ6GEYJ223 S.M.CARB 0.1W RESISTORS R114 ERJ6GEYJ331 S.M.CARB 0.1W C101 ERJ6GEY0R00 S.M.CARB 0.1W R115 ERJ6GEYJ331 S.M.CARB 0.1W JA40 ERJ6GEY0R00 S.M.CARB 0.1W R116 ERJ6GEYJ562 S.M.CARB 0.1W JA28...
  • Page 23 All manuals and user guides at all-guides.com Cct Ref Parts Number Description Cct Ref Parts Number Description R463 ERD25TJ222 CARBON 0.25W R814 ERD25TJ473 CARBON 0.25W R464 ERJ6GEYJ182 S.M.CARB 0.1W R815 ERD25TJ222 CARBON 0.25W R465 ERJ6GEYJ681 S.M.CARB 0.1W R850 ERD25TJ122 CARBON 0.25W R502 ERJ6GEYJ560...
  • Page 24 All manuals and user guides at all-guides.com Cct Ref Parts Number Description Cct Ref Parts Number Description R1137 ERJ6GEY0R00 S.M.CARB 0.1W R3002 ERJ6GEYJ471 S.M.CARB 0.1W R1138 ERJ6GEYJ474 S.M.CARB 0.1W 470K R3003 ERJ6GEYJ101 S.M.CARB 0.1W R1139 ERJ6GEYJ471 S.M.CARB 0.1W R3004 ERJ6GEYJ153 S.M.CARB 0.1W R1140...
  • Page 25 All manuals and user guides at all-guides.com Cct Ref Parts Number Description Cct Ref Parts Number Description 10nF C111 ECA1HMR33GB ELECT C601 ECUV1H104KBX S.M. CAP 10nF 100µF C602 ECA1HM101GB ELECT C117 ECUV1H103ZFX S.M. CAP 100nF C118 ECJ2VF1H104Z ELECT 350V C603 ECUV1H102JCX S.M.
  • Page 26 All manuals and user guides at all-guides.com Cct Ref Parts Number Description Cct Ref Parts Number Description 100nF 10nF C862 ECJ2VF1H104Z ELECT 350V C2134 ECUV1H103ZFX S.M. CAP 100µF 100µF C863 ECA1HM101GB ELECT C2135 ECA1HM101GB ELECT 100nF 100nF C866 ECJ2VF1H104Z ELECT 350V C2136 ECJ2VF1H104Z...
  • Page 27 TLK8E05117 DEGAUSS COIL D904 MA165TA5 DIODE TNP8EE009BD E P.C.B. D905 MA165TA5 DIODE TQF8E2676 MODEL LABEL D906 RLS72TE-11 DIODE TBM153022 PANASONIC BADGE TRANSISTORS TBX8E041-1 POWER BUTTON Q905 BC847B TRANSISTOR TSX8E0028 POWER CORD Q906 BC847B TRANSISTOR TNP8EY013AA Y P.C.B. Q907 BC857B TRANSISTOR...
  • Page 28 ELECT R923 ERD25TJ393 CARBON 0.25W 10µF C916 ECA2CHG100B ELECT 160V R924 ERDS1FJ390 CARBON 0.5W R925 ERJ6GEY0R00 S.M.CARB 0.1W DIFFERENCES FOR MODEL TX-28MD4C R926 ERJ6GEY0R00 S.M.CARB 0.1W R927 ERD25TJ471 CARBON 0.25W R928 ERD25TJ5R6 CARBON 0.25W MECHANICAL PARTS R929 ERDS1FJ471 CARBON 0.5W...

  • Page 29: Schematic Diagrams

    All manuals and user guides at all-guides.com SCHEMATIC DIAGRAMS FOR MODELS ZEICHENERKLÄRUNG FÜR MODELL TX-28MD4C / TX-25MD4C / TX-21MD4C TX-28MD4C / TX-25MD4C / TX-21MD4C (EURO-4 CHASSIS) (EURO-4 CHASSIS) IMPORTANT SAFETY NOTICE WICHTIGER SICHERHEITSHINWEIS Components identified by mark have special Teile, die mit einen Hinweis...
  • Page 30 All manuals and user guides at all-guides.com...
  • Page 31 All manuals and user guides at all-guides.com...
  • Page 32 All manuals and user guides at all-guides.com...

  • Page 33: Conductor Views

    All manuals and user guides at all-guides.com...
  • Page 34 All manuals and user guides at all-guides.com...
  • Page 35 CONDUCTOR VIEWS ANSICHT DER LEITERBAHNEN All manuals and user guides at all-guides.com 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...
  • Page 36 Y - BOARD TNP8EY012 All manuals and user guides at all-guides.com 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...
  • Page 37 Y - BOARD TNP8EY013 All manuals and user guides at all-guides.com DIODES D354 D355 D356 D357 D358 D359 D360 D361 D362 D363 D364 TEST POINTS TPY1 TPY2 TPY3 TPY4 TPY5 TPY6 TRANSISTORS Q351 Q352 Q353 Q354 I.C.’S IC351...
  • Page 38 all-guides.c...

This manual is also suitable for:

Tx-25md4cTx-21md4c

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