Panasonic TX-28LD4F Service Manual

Euro4 chassis

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TX-28/25LD4F 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.

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Summary of Contents for Panasonic TX-28LD4F

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 company. Disassembly PCB Views Location of Controls EXIT BACK Waveforms...
Page 2 Audio Control Power supply Video BACK E - Schematic H - Schematic E - PCB Y - PCB N - Schematic Y - Schematic BACK BACK...
Page 3 ORDER No. SM-98007 Colour Television TX-28LD4F / TX-25LD4F EURO4 Chassis SPECIFICATIONS CARACTÉRISTIQUES (Information in brackets { } refer to TX-25LD4F) (Les informations entre parenthèses { } concernent le TX-25LD4F) Power Source: 220-240V AC, 50Hz Alimentation: 220-240V AC, 50Hz Power Consumption:...
Page 4 CONTENTS CONTENTS SAFETY PRECAUTIONS ............ 2 PRECAUTIONS DE SECURITE .......... 2 SERVICE HINTS ..............4 SUGGESTIONS DE DEPANNAGE ........4 SERVICE MODE ..............5 RÉGLAGES................. 6 SELF CHECK ..............7 AUTO-TEST ................ 7 ADJUSTMENT PROCEDURE ..........8 RÉGLAGES................. 8 WAVEFORM PATTERN TABLE .......... 9 TABLEAU DES OSCILLOGRAMMES........
Page 5 LEAKAGE CURRENT HOT CHECK VERIFICATION A CHAUD DU COURANT DE FUITE Plug the AC cord directly into the AC outlet. Do not Brancher le cordon secteur directement à une prise use an isolation transformer for this check. secteur. Ne pas utiliser de transformateur d'isolation Connect a 2kΩ...
Page 6 SERVICE HINTS SUGGESTIONS DE DEPANNAGE HOW TO REMOVE THE REAR COVER COMMENT RETIRER LE PENNEAU ARRIÈRE Remove the 12 screws (A) as shown in Fig.2. Retirer les 12 vis (A) comme sur la Fig.2. Screws A Vis A Fig.2. LOCATION OF CONTROLS EMPLACEMENT DES COMMANDES Focus Concentration...
Page 7 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 RÉGLAGES La télécommande sert à entrer et stocker les données des réglages. Sauf pour le cut-off qui doit être réalisé en priorité. Les réglages s'affichent sur l'écran, ainst qui les spécificités nominales du CCU. Régler par la télécommande le niveau de GRAVE au Appuyer sur la touche JAUNE ou BLEUE pour maximum, AIGU au minimum.
Page 9 SELF CHECK AUTO TEST Self-check is used to automatically check the bus L'auto test est utilísé pour vérifier les BUS et les lines and hexadecimal code of the TV set. codes Hexadécimaux du TV . Pour renter dans le mode Auto Test presser le To get into the Self-Check mode press the down bouton STATUS de la télécommande et...
Page 10 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 ± 0.25V ± 0.5V ± 1.5V Brightness Minimum ±...
Page 11 WAVEFORM PATTERN TABLE TABLEAU DES OSCILLOGRAMMES VFLB Vert Drive Vert Out IC451 Pin 3 IC451 Pin 2 IC601 Pin 31 20mS 20mS 20mS H - Out H - Out H - Pulse IC601 Pin 50 IC701 Pin 5 Base Q503 64µS 64µS 64µS...
Page 12 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 RÉGLAGES (Les figures ci-dessous sont fictives et utilisées uniquement à des fins représentatives) Fonctions Réglages/Points particuliers H-Pos Centrage Horizontal Optimiser les réglages. V-Pos V-Pos. Optimiser les réglages. H-Amp Amplitude Horizontal Optimiser les réglages. V. Amp Amplitude Verticale Optimiser les réglages. E/W-Amp1 Amplitude E.O.
Page 14 VIDEO BLOCK DIAGRAM SYNOPTIQUE VIDEO 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 SYNOPTIQUE AUDIO E - BOARD TUNER IC251 IC2101 AUDIO AUDIO OUTPUT PROCESSOR Q103 DACM_R 24 Q2102 Q252 X101 HEADPHONE DACM_L 25 L 11 Q2103 Q251 X102 SC3_IN_L 37 SC3_IN_R 38 Q101 44 MONO IN 1 R OUT SC1_OUT_R 30 2 R IN SC1_IN_R 42...
Page 16 CONTROL BLOCK DIAGRAM SYNOPTIQUE DE COMMANDE E - BOARD H - BOARD TUNER POS/NEG IC3401 L/L’ VIDEO IC2101 SWITCHING AUDIO IC601 Q3401 SDA 1 PROCESSOR VIDEO PROCESSOR SCL 1 SERVICE / TEST SDA 1 SCL 1 SDA 2 SCL 2 VPROT Q451 LOCAL...
Page 17 POWER SUPPLY BLOCK DIAGRAM SYNOPTIQUE ALIMENTATION E - BOARD 5V SBY Q852 D867 Q855 D868 Q853 Q854 IC251 Y - BOARD AUDIO D862 T802 RL801 OUTPUT R854 IC351 T801 D801 Line Filter T551 OUTPUT 150V 200V D850 R802 Q850 DEGAUSS COIL -14V IC451...
Page 18 PARTS LOCATION EMPLACEMENT DES PIECES NOTE: REMARQUE The numbers on the exploded view below Les numéros des pièces sur la vue éclatée refer to the mechanical section of the ci-dessous renvoient à la section mécanique Replacement Parts List. de la liste des pièces de rechange.
Page 19 DIODE EASG15S505A2 SPEAKER IC2101 MSP3410DPOB4 AUDIO PROCESSOR ENG29504G TUNER IC3401 TEA2114 AV SWITCHING EUR511200 REMOTE CONTROL FUSES TBM8E1728 PANASONIC BADGE F802 19181-3.15 FUSE TBX8E050 POWER BUTTON F8021 EYF52BC FUSE HOLDER TKP8E1222 REAR AV COVER F8022 EYF52BC FUSE HOLDER TKP8E1223 DOOR LID...
Page 20 Cct Ref Parts Number Description Cct Ref Parts Number Description D801 RBV4-08 DIODE Q552 2SC1473-RN TRANSISTOR D803 1SR124-4AT82 DIODE Q701 BC857B TRANSISTOR D804 1SR124-4AT82 DIODE Q850 2SD1273PLB TRANSISTOR D805 TLP621GR-LF2 PHOTO COUPLER Q851 BC857B TRANSISTOR D806 1SR124-4AT82 DIODE Q852 2SC1383-S TRANSISTOR D850 RU4BLF-L1...
Page 21 Cct Ref Parts Number Description Cct Ref Parts Number Description L855 EXCELSA35T COIL ERJ6GEY0R00 S.M.CARB 0.1W L856 EXCELSA39V COIL ERJ6GEY0R00 S.M.CARB 0.1W L901 EXCELSA24T COIL JSE26 ERJ8GEY0R00 S.M.CARB .125W L902 EXCELSA24T COIL JA43 ERJ8GEY0R00 S.M.CARB .125W L1103 TLTACT100K COIL ERJ8GEY0R00 S.M.CARB .125W L1104...
Page 22 Cct Ref Parts Number Description Cct Ref Parts Number Description R311 ERJ6GEYJ750 S.M.CARB 0.1W R611 ERJ6GEYJ103 S.M.CARB 0.1W R312 ERJ6GEYJ331 S.M.CARB 0.1W R612 ERJ6GEYJ101 S.M.CARB 0.1W R351 ERJ6GEYJ302 S.M.CARB 0.1W R613 ERJ6GEYJ751 S.M.CARB 0.1W R352 ERJ6GEYJ302 S.M.CARB 0.1W R622 ERJ6GEY0R00 S.M.CARB 0.1W R353...
Page 23 Cct Ref Parts Number Description Cct Ref Parts Number Description R914 ERJ6GEYJ822 S.M.CARB 0.1W R1148 ERJ6GEYJ101 S.M.CARB 0.1W R915 ERJ6GEYJ152 S.M.CARB 0.1W R1149 ERJ6GEYJ223 S.M.CARB 0.1W R916 ERJ6GEYJ391 S.M.CARB 0.1W R1151 ERJ6GEYJ101 S.M.CARB 0.1W R919 ERQ14AJW390 FUSIBLE 0.25W R1152 ERJ6GEYJ101 S.M.CARB 0.1W R920...
Page 24 Cct Ref Parts Number Description Cct Ref Parts Number Description 22pF R3010 ERJ6GEYJ750 S.M.CARB 0.1W C124 ECUV1H220JCX S.M. CAP 10pF R3011 ERJ6GEYJ101 S.M.CARB 0.1W C125 ECUV1H100DCX S.M. CAP 33µF R3012 ERJ6GEYJ750 S.M.CARB 0.1W C251 ECA1EM330B ELECT 22nF C252 ECUV1H223KBX S.M. CAP R3013 ERJ6GEYJ101 S.M.CARB...
Page 25 Cct Ref Parts Number Description Cct Ref Parts Number Description 22nF 100nF C604 ECUV1H223ZFX S.M. CAP C866 ECJ2VF1H104Z ELECT 350V 100µF 10µF C605 ECA1HM101GB ELECT C867 ECA1CM100GB ELECT 3.3µF 10µF C606 ECA1HM3R3GB ELECT C868 ECA1CM100GB ELECT 100nF 100µF C607 ECJ2VF1H104Z ELECT 350V C869...
Page 26 2.2nF C3016 ECUV1H222JCX S.M. CAP 1.5nF C551 ECKC3D152J CERAMIC 47µF C3017 ECA1CM470GB ELECT 560pF C3019 ECUV1H561JCX S.M. CAP DIFFERENCES FOR MODEL TX-28LD4F 470nF C3020 ECJ3VB1C474K ELECT 3.5KV 2.2nF C3021 ECUV1H222JCX S.M. CAP 2.2nF MECHANICAL PARTS C3022 ECUV1H222JCX S.M. CAP 2.2nF...
Page 27 NOTES...
Page 28 SCHEMATIC DIAGRAMS FOR MODELS SCHEMA TECHNIQUE POUR MODELE TX-28LD4F / TX-25LD4F TX-28LD4F / TX-25LD4F (EURO-4 CHASSIS) (EURO-4 CHASSIS) IMPORTANT SAFETY NOTICE REMARQUE IMPORTANTE POUR LA SÉCURITÉ Components identified by mark have special Les éléments portant la marque possèdent characteristics important for safety. When replacing any of caractéristiques...
Page 33 CONDUCTOR VIEWS VUE DU CIRCUIT IMPRIMÉ 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...
Page 34 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...

This manual is also suitable for:

Tx-25ld4f