Panasonic TX-28DK20D Service Manual
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Panasonic TX-28DK20D Service Manual

Panasonic TX-28DK20D Service Manual

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SPECIFICATIONS
Power Source:
220-240V a.c., 50Hz
Power Consumption:
127W
Standby Power
Consumption:
1,4W
Aerial Impedance:
75Ω unbalanced, Coaxial Type
Receiving System:
PAL-B/G, H, I, D/K, PAL-525/60
SECAM B/G, D/K, L/L'
M.NTSC
NTSC (AV only)
Receiving Channels:
VHF E2-E12
VHF H1-H2 (ITALY)
VHF A-H (ITALY)
VHF R1-R2
VHF R3-R5
VHF R6-R12
UHF E21-E69
CATV (S01-S05)
CATV S1-S10 (M1-M10)
CATV S11-S20 (U1-U10)
CATV S21-S41 (HYPERBAND)
Intermediate Frequency:
Video
38,9MHz, 34MHz
Sound
32,9MHz, 33,16MHz, 33,4MHz
40,4MHz, 32,4MHz (A2 STEREO)
33,05MHz, 34,05MHz (NICAM)
32,66MHz, 32,4MHz (CZECH STEREO)
Colour
34,47MHz (PAL)
34,5MHz, 34,65MHz (SECAM)
Video/Audio Terminals:
AUDIO MONITOR OUT
Audio (RCAx2)
AV1 IN
Video (21 pin)
Audio (21 pin)
RGB (21 pin)
AV1 OUT
Video (21 pin)
Audio (21 pin)
AV2 IN
Video (21 pin)
Audio (21 pin)
S-Video IN
(21 pin)
AV2 OUT
Video (21 pin)
Audio (21 pin)
Selectable Output (21 pin)
AV3 IN
Audio (RCAx2)
Video (RCAx1)
High Voltage:
30,5kV ± 1kV
Picture Tube:
W66EHK51X81 66cm
Audio Output:
2 x 20W (Music Power)
8Ω Impedance
Headphones
8Ω Impedance
Accessories supplied:
Remote Control
2 x R6 (UM3) Batteries
Dimensions:
Height:
514mm
Width:
796mm
Depth:
514mm
Net Weight:
36kg
Specifications are subject to change without notice.
Weights and dimensions shown are approximate.
NOTE: This Service Manual should be used in conjunction with the
EURO-4H technical guide.
500mV rms1kΩ
1V p-p 75Ω
500mV rms 10kΩ
1V p-p 75Ω
500mV rms 1kΩ
1V p-p 75Ω
500mV rms 10kΩ
Y: 1V p-p 75Ω
C: 0,3V p-p 75Ω
1V p-p 75Ω
500mV rms 1kΩ
500mV rms10kΩ
1V p-p 75Ω

Colour Television

EURO-4H Chassis
TECHNISCHE DATEN
Netzpannung:
220-240V a.c., 50Hz
Leistungsaufnahme:
127W
Standby
Leistungsaufnahme:
1,4W
Antennenimpedanz:
75Ω asymmetrisch, Koaxial-Typ
Empfangssystem:
PAL-B/G, H, I, D/K, PAL-525/60
SECAM B/G, D/K, L/L'
M.NTSC
NTSC (nur AV Eingang)
Empfangsbereiche:
VHF E2-E12
VHF H1-H2 (ITALY)
VHF A-H (ITALY)
VHF R1-R2
VHF R3-R5
VHF R6-R12
UHF E21-E69
CATV (S01-S05)
CATV S1-S10 (M1-M10)
CATV S11-S20 (U1-U10)
CATV S21-S41 (HYPERBAND)
Zwischenfrequenz:
Video
38,9MHz, 34MHz
Sound
32,9MHz, 33,16MHz, 33,4MHz
40,4MHz, 32,4MHz (A2 STEREO)
33,05MHz, 34,05MHz (NICAM)
32,66MHz, 32,4MHz (CZECH STEREO)
Colour
34,47MHz (PAL)
34,5MHz, 34,65MHz (SECAM)
Video/Audio Anschlüsse:
AUDIO MONITOR OUT
Audio (RCAx2)
AV1 EINGANG
Video (21 pin)
Audio (21 pin)
RGB (21 pin)
AV1 AUSGANG
Video (21 pin)
Audio (21 pin)
AV2 EINGANG
Video (21 pin)
Audio (21 pin)
S-Video IN
(21 pin)
AV2 AUSGANG
Video (21 pin)
Audio (21 pin)
Wählbarer Ausgang
AV3 EINGANG
Audio (RCAx2)
Video (RCAx1)
Hochspannung:
30,5kV ± 1kV
Bildrohre:
W66EHK51X81 66cm
Ton Ausgangsleistung:
2 x 20W (Musikleistung)
Lautsprecher
8Ω Impedanz
Kopfhörer:
8Ω Impedanz
Mitgel. Zubehör:
Fernbedienung
2 x R6 (UM3) Batterien
Abmessungen:
Höhe:
514mm
Breite:
796mm
Tiefe:
514mm
Gewicht:
36kg
Änderungen der Technisichen Daten vorbehalten.
Gewichte und Abmessungen sind Näherungsangaben.
Hinweis: Bitte verwende Sie das Service Manual zusammen mit dem
Technical Guide.
ORDER No. SM-00003
TX-28DK20D
TX-28DK20F
500mV rms1kΩ
1V p-p 75Ω
500mV rms 10kΩ
1V p-p 75Ω
500mV rms 1kΩ
1V p-p 75Ω
500mV rms 10kΩ
Y: 1V p-p 75Ω
C: 0,3V p-p 75Ω
1V p-p 75Ω
500mV rms 1kΩ
500mV rms10kΩ
1V p-p 75Ω

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Summary of Contents for Panasonic TX-28DK20D

  • Page 1: Colour Television

    ORDER No. SM-00003 Colour Television TX-28DK20D TX-28DK20F EURO-4H Chassis SPECIFICATIONS TECHNISCHE DATEN Power Source: 220-240V a.c., 50Hz Netzpannung: 220-240V a.c., 50Hz Power Consumption: 127W Leistungsaufnahme: 127W Standby Power Standby Consumption: 1,4W Leistungsaufnahme: 1,4W Aerial Impedance: 75Ω unbalanced, Coaxial Type Antennenimpedanz: 75Ω...

  • Page 2: Table Of Contents

    CONTENTS INHALT SAFETY PRECAUTIONS ............ 2 SICHERHEITSVORKEHRUNGEN ........2 SERVICE HINTS ..............4 SERVICE HINWEISE ............4 SERVICE POSITION ............5 SERVICEPOSITION FÜR DAS CHASSIS ......5 SELF CHECK ..............6 SELBSTDIAGNOSE ............6 ADJUSTMENT PROCEDURE ..........7 ABGLEICH ................7 WAVEFORM PATTERN TABLE ..........
  • Page 3 LEAKAGE CURRENT HOT CHECK MESSUNG DES KRIECHSTROMS IM EINGESCHALTETEN ZUSTAND Plug the a.c. cord directly into the a.c. 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 4: Service Hints

    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 SCREWS SCHRAUBEN SCHRAUBEN Fig.2. Abb.2. LOCATION OF CONTROLS LAGE DER EINSTELLREGLER Y-Board P-Board M-Board Focus...

  • Page 5: Service Position

    HOW TO MOVE THE CHASSIS SERVICEPOSITION FÜR DAS CHASSIS INTO SERVICE POSITION Remove the bead clamper from the mains lead and Entfernen Sie den Kabelbinder von der Netzleitung und affix, using back cover screw, into top right-hand befestigen Sie ihn mit einer Rückwandschraube am Gehäuse cabinet rib (A), shown in Fig.4.

  • Page 6: Self Check

    O.K. O.K. O.K. O.K. O.K. Factory use only O.K. Nur für Herstellung O.K. O.K. O.K. TX-28DK20D TX-28DK20F OPTION1 39 OPTION1 39 OPTION2 1D OPTION2 1D OPTION3 2F OPTION3 2F OPTION4 00 OPTION4 00 OPTION5 FF OPTION5 FD OPTION6 A5 OPTION6 A5 If the CCU ports have been checked and found to be incorrect or not located then "...

  • Page 7: Adjustment Procedure

    ADJUSTMENT PROCEDURE Item/Preparation Adjustments Set the +B voltage up as follows:- +B SET-UP Adjust R811 so that B2 shows 148V ± 2V Receive a Greyscale signal. Confirm the following voltages. Set the controls:- ± 0,25V ± 0,25V Brightness Minimum ± 0,5V ±...

  • Page 8: Waveform Pattern Table

    WAVEFORM PATTERN TABLE SIGNAL TABELLE 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 Video Out...

  • Page 9: Alignment Settings

    ALIGNMENT SETTINGS (The figures below are nominal and used for representative purposes only.) Set the Bass to maximum position, set the Treble to minimum position, press the volume down button (-/v) on the customer controls at the front of the TV and at the same time press the INDEX button on the remote control, this will place the TV into the Service Mode.

  • Page 10: Abgleichtabelle

    ABGLEICHTABELLE (Die angegebenen Werte sind Mittelwerte und Können individuell nach oben oder unten nach dem korrekten Abgleich abweichen.) Um in den Service-Mode zu gelangen, gehen sie bitte wie folgt vor. Stellen sie im Toneinstellungs-Menü die Bässe auf Maximun und die Höhen auf Minimum. Halten sie die INDEX-Taste auf der Fernbedienung gedrückt und drücken zusätzlich die Taste -/v im Bedienteil des TV- Gerätes.

  • Page 11: Block Diagrams

    VIDEO BLOCK DIAGRAM BILDSIGNAL BLOCKSCHEMA F - BOARD E - BOARD IC1502 TUNER Q104 C.I.P. IC1501 Q105 VIDEO Wvqr‚ÃPˆ‡Ã ( PROCESSOR 7yˆrÃÃ& B…rrÃ Srqà $ CVBS 68 Q1501 Wvqr‚ÃDÃ! R 37 IC1101 IC1504 DEFLECTION MICRO G 38 PROCESSOR PROCESSOR B 39 Wvqr‚ÃDÃ! Q1511 Q1512...
  • Page 12 AUDIO BLOCK DIAGRAM TONSIGNAL BLOCKSCHEMA M - BOARD IC2101 AUDIO E - BOARD PROCESSOR E16A IC251 DACM_R 24 Q2102 AUDIO Q252 TUNER OUTPUT Q2103 DACM_L 25 L 11 Q251 HEADPHONE Q103 X101 SC3_IN_L 37 44 MONO IN SC3_IN_R 38 X102 Q101 49 ANA_IN2+ 1 R OUT...
  • Page 13 CONTROL BLOCK DIAGRAM STROMVERSORGUNGS BLOCKSCHEMA E - BOARD To Y2 F - BOARD SENSE TUNER IC1503 IC1504 L/L’ POS/NEG CONVERTER DEFLECTION IC601 PROCESSOR IC601 AV VIDEO IC2101 SCL 1 SWITCH VIDEO AUDIO D_CTR_OUT0 PROCESSOR SDA 1 PROCESSOR Q601 SDA 1 IC1501 IC1502 SERVICE /...
  • Page 14 POWER SUPPLY BLOCK DIAGRAM STROMVERSORGUNGS BLOCKSCHEMA E - BOARD M - BOARD Q852 5V SBY E16A IC1061 REMOTE D867 Q855 CONTROL D868 Q853 Q854 RECEIVER IC251 AUDIO D862 T802 RL801 R854 OUTPUT T801 D801 Line Filter Y - BOARD 150V 150V D850 Line...

  • Page 15: 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 16: Replacement Parts List

    SPEAKER IC850 SE140N ERROR AMPLIFIER ENG29505GR TUNER IC851 AN7812LB1 12V REGULATOR EUR511211 REMOTE CONTROL IC852 L78M09MRB 9V REGULATOR TBM8E1928 PANASONIC BADGE IC853 AN78L08TA 8V REGULATOR TBX8E078 POWER BUTTON IC855 BA033T-M3 REGULATOR TKP8E1301 REAR AV PANEL IC856 AN7805LB 5V REGULATOR TKP8E1308...
  • Page 17 Cct Ref Parts Number Description Cct Ref Parts Number Description D557 TVSRU2AMLFA5 DIODE D2105 MTZJT-778.2C DIODE D558 EU02 DIODE D2303 MA723TA5 DIODE D560 RH3GLF102 DIODE D2304 MA723TA5 DIODE D580 FMV-3GULF730 DIODE D3201 MTZJT-778.2C DIODE D601 MA165TA5 DIODE D3202 MTZJT-778.2C DIODE D602 MA165TA5 DIODE...
  • Page 18 Cct Ref Parts Number Description Cct Ref Parts Number Description Q2102 BC857B TRANSISTOR L1505 ELESN100KA COIL Q2103 BC857B TRANSISTOR L1506 ELESN100KA COIL Q2301 BC847B TRANSISTOR L1507 ELESNR22KA COIL Q2302 BC857B TRANSISTOR L1508 ELESNR22KA COIL Q2303 BC847B TRANSISTOR L1509 ELESN100KA COIL Q2304 BC857B TRANSISTOR...
  • Page 19 Cct Ref Parts Number Description Cct Ref Parts Number Description JA103 ERJ8GEY0R00 S.M.CARB .125W R260 ERJ6GEYJ103 S.M.CARB 0.1W JA104 ERJ8GEY0R00 S.M.CARB .125W R261 ERJ6GEYJ471 S.M.CARB 0.1W JA105 ERJ8GEY0R00 S.M.CARB .125W R262 ERJ6GEYJ103 S.M.CARB 0.1W JA106 ERJ8GEY0R00 S.M.CARB .125W R263 ERJ6GEYJ473 S.M.CARB 0.1W JA107...
  • Page 20 Cct Ref Parts Number Description Cct Ref Parts Number Description R581 ERQ2CJP821 METAL R873 ERG1SJ223 METAL R583 ERG3FJ331 METAL R874 ERDS2TJ104T CARBON 100K R603 2-640463-3 METAL R876 ERJ6GEYJ103 S.M.CARB 0.1W R604 ERJ6GEYJ101 S.M.CARB 0.1W R877 ERW2PKR47 WOUND 2W 10% R605 ERJ6GEYJ101 S.M.CARB 0.1W...
  • Page 21 Cct Ref Parts Number Description Cct Ref Parts Number Description R1137 ERJ6GEY0R00 S.M.CARB 0.1W R1532 ERJ6GEYJ391 S.M.CARB 0.1W R1138 ERJ6GEYJ105 S.M.CARB 0.1W R1533 ERJ6GEYJ122 S.M.CARB 0.1W R1139 ERJ6GEYJ471 S.M.CARB 0.1W R1534 ERJ6GEYJ102 S.M.CARB 0.1W R1140 ERJ6GEYJ471 S.M.CARB 0.1W R1535 ERJ6GEYJ750 S.M.CARB 0.1W R1141...
  • Page 22 Cct Ref Parts Number Description Cct Ref Parts Number Description R2117 ERJ6GEYJ101 S.M.CARB 0.1W R3230 ERJ6GEYJ302 S.M.CARB 0.1W R2118 ERJ6GEYJ822 S.M.CARB 0.1W R3231 ERJ6GEYJ122 S.M.CARB 0.1W R2119 ERJ6GEYJ101 S.M.CARB 0.1W R3232 ERJ6GEYJ242 S.M.CARB 0.1W R2120 ERJ6GEYJ222 S.M.CARB 0.1W R3233 ERJ6GEYJ391 S.M.CARB 0.1W R2302...
  • Page 23 Cct Ref Parts Number Description Cct Ref Parts Number Description 100nF 470pF C374 ECQM2104KZ FILM 250V C855 ECKC2H471J CERAMIC 500V 3.3nF C375 ECKC2H102J CERAMIC 500V C856 ECA1AHG332B ELECT 2.2nF 470pF C378 ECUV1H222JCX S.M. CAP C857 ECKC2H471J CERAMIC 500V 100µF 1000µF C381 ECEA1HU101 ELECT...
  • Page 24 Cct Ref Parts Number Description Cct Ref Parts Number Description 10µF 270pF C1518 ECEA1CKA100 ELECT C1592 ECUV1H271JCX S.M. CAP 50pF 270pF C1519 ECUV1H050CCX S.M. CAP C1594 ECUV1H271JCX S.M. CAP 50pF 270pF C1520 ECUV1H050CCX S.M. CAP C1596 ECUV1H271JCX S.M. CAP 10nF 270pF C1521 ECJ2VB1H103K...
  • Page 25 Cct Ref Parts Number Description Cct Ref Parts Number Description 270pF C3032 ECUV1H271JCX S.M. CAP 2.2nF C3111 ECUV1H222KBX S.M. CAP 10nF C3201 ECUV1H103KBX S.M. CAP 10nF C3202 ECUV1H103KBX S.M. CAP 560pF C3203 ECUV1H561JCX S.M. CAP 560pF C3204 ECUV1H561JCX S.M. CAP 560pF C3206 ECUV1H561JCX...

  • Page 26: Schematic Diagrams

    SCHEMATIC DIAGRAMS FOR MODELS ZEICHENERKLÄRUNG FÜR MODELL TX-28DK20D TX-28DK20D TX-28DK20F TX-28DK20F (EURO-4H CHASSIS) (EURO-4H 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...

  • Page 32: Ansicht Der Leiterbahnen

    CONDUCTOR VIEWS ANSICHT DER LEITERBAHNEN E-BOARD TNP8EE013 TRAN’S DIODES Q101 D251 D869 Q103 D253 D870 Q104 D254 D871 Q105 D453 D873 Q182 D454 D875 Q251 D456 D890 Q252 D457 D891 Q253 D458 D1051 Q254 D501 D1101 Q451 D502 D1103 Q503 D511 D1104 Q551...
  • Page 33 F - BOARD TNP8EF007 TRAN’S Q1502 C3 Q1503 C3 Q1504 C2 Q1505 D3 Q1506 C3 Q1507 C3 Q1514 C2 Q1515 C2 I.C.’S IC1501 B1 IC1502 A2 IC1503 A3 IC1504 B3...
  • Page 34 F - BOARD TNP8EF007 TRAN’S Q1501 C3 Q1508 C1 Q1509 C2 Q1510 C2 Q1511 C1 Q1512 D1 Q1513 C1...
  • Page 35 M - BOARD TNP8EM021 TRANSISTORS Q1061 Q1062 Q3201 Q3202 Q3203 Q3204 Q3205 Q3206 Q3207 Q3208 Q3209 Q1900 DIODES D1061 D3201 D3202 D3203 D1900 IC’S IC1061 IC1900 IC1901...
  • Page 36 P - BOARD TNP8EP017 DIODES D580 D581...
  • Page 37 Y - BOARD TNP8EY018 TRAN’S Q351 Q361 Q371 Q905 Q906 Q907 Q908 Q909 Q3351 A2 Q3352 A2 DIODES D351 D352 D361 D362 D371 D372 D373 D374 D375 D376 D377 D378 D387 D901 D902 D903 D910 D911 D912 D3351 A2 D3352 A3 D3353 A1 D3354 C3 T.P.’S...

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