Panasonic TX-28PK20F Service Manual
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Panasonic TX-28PK20F Service Manual

Panasonic TX-28PK20F Service Manual

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SPECIFICATIONS
Power Source:
220-240V a.c., 50Hz
Power Consumption:
133W
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:
W66EKT10X71 66cm
Audio Output:
2 x 15W (Music Power)
8Ω Impedance
Headphones
8Ω Impedance
Accessories supplied:
Remote Control
2 x R6 (UM3) Batteries
Dimensions:
Height:
503mm
Width:
720mm
Depth:
527mm
Net Weight:
43kg
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:
133W
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:
W66EKT10X71 66cm
Ton Ausgangsleistung:
2 x 15W (Musikleistung)
Lautsprecher
8Ω Impedanz
Kopfhörer:
8Ω Impedanz
Mitgel. Zubehör:
Fernbedienung
2 x R6 (UM3) Batterien
Abmessungen:
Höhe:
503mm
Breite:
720mm
Tiefe:
527mm
Gewicht:
43kg
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-00037
TX-28PK20F
TX-28PK20D
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-28PK20F

  • Page 1 ORDER No. SM-00037 Colour Television TX-28PK20F TX-28PK20D EURO-4H Chassis SPECIFICATIONS TECHNISCHE DATEN Power Source: 220-240V a.c., 50Hz Netzpannung: 220-240V a.c., 50Hz Power Consumption: 133W Leistungsaufnahme: 133W 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 10 screws as shown in Fig.2. Die 10 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-28PK20F TX-28PK20D OPTION1 39 OPTION1 39 OPTION2 7F OPTION2 7F OPTION3 0F OPTION3 0F OPTION4 40 OPTION4 40 OPTION5 FD OPTION5 FF 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 +B SET-UP Set the +B voltage up as follows:- 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 Vert Drive VFLB 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 HFLB...

  • 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 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

    THERMISTOR EABG12505A2 SPEAKER I.C.s ENG29505GR TUNER IC251 LA4282 AUDIO OUTPUT EUR511211 REMOTE CONTROL IC351 TDA6111Q-N4 RGB OUTPUT TBMA060 PANASONIC BADGE IC361 TDA6111Q-N4 RGB OUTPUT TBX8E068 POWER BUTTON IC371 TDA6111Q-N4 RGB OUTPUT TKK8E026 SPEAKER REFLECTOR IC381 TL431CLPM REGULATOR TKP8E1284 SPEAKER NET...
  • Page 17 Cct Ref Parts Number Description Cct Ref Parts Number Description D377 MA165TA5 DIODE D902 1SS254T-77 DIODE D378 MA165TA5 DIODE D903 1SS254T-77 DIODE D387 MA2160LFS DIODE D907 MA165TA5 DIODE D453 MA165TA5 DIODE D910 R2KNLFA1 DIODE D454 EU02 DIODE D1061 LN81RPHCF3 D456 MTZJT-777.5B DIODE D1101...
  • Page 18 Cct Ref Parts Number Description Cct Ref Parts Number Description Q1504 BC847B TRANSISTOR L704 ELC10D332E COIL Q1505 BC857B TRANSISTOR L705 EXCELDR35V COIL Q1506 BC847B TRANSISTOR L850 EXCELSA35T COIL Q1507 BC847B TRANSISTOR L851 EXCELSA35T COIL Q1508 BC857B TRANSISTOR L852 ELEIE470KA COIL Q1509 BC847B TRANSISTOR...
  • Page 19 Cct Ref Parts Number Description Cct Ref Parts Number Description C510 ERJ6GEY0R00 S.M.CARB 0.1W JSM10 ERJ6GEY0R00 S.M.CARB 0.1W C2214 ERJ6GEY0R00 S.M.CARB 0.1W JSY04 ERJ6GEY0R00 S.M.CARB 0.1W C2234 ERJ6GEY0R00 S.M.CARB 0.1W R101 ERJ6GEYJ331 S.M.CARB 0.1W ERJ6GEY0R00 S.M.CARB 0.1W R102 ERJ6GEYJ103 S.M.CARB 0.1W ERJ6GEY0R00 S.M.CARB...
  • Page 20 Cct Ref Parts Number Description Cct Ref Parts Number Description R454 ERJ6GEYJ393 S.M.CARB 0.1W R806 ERD25TJ100 CARBON 0.25W R455 ERJ6GEYJ223 S.M.CARB 0.1W R807 ERD25TJ332 CARBON 0.25W R456 ERJ6GEYJ104 S.M.CARB 0.1W 100K R809 ERD25TJ681 CARBON 0.25W R457 ERJ6GEYJ223 S.M.CARB 0.1W R810 ERW2PKR22 WOUND R458...
  • Page 21 Cct Ref Parts Number Description Cct Ref Parts Number Description R1104 ERJ6GEYJ331 S.M.CARB 0.1W R1252 ERJ6GEYJ222 S.M.CARB 0.1W R1105 ERJ6GEYJ101 S.M.CARB 0.1W R1253 ERJ6GEYJ332 S.M.CARB 0.1W R1106 ERJ6GEYJ104 S.M.CARB 0.1W 100K R1254 ERJ6GEYJ512 S.M.CARB 0.1W R1107 ERJ6GEYJ104 S.M.CARB 0.1W 100K R1255 ERJ6GEYJ912 S.M.CARB...
  • Page 22 Cct Ref Parts Number Description Cct Ref Parts Number Description R1568 ERJ6GEYJ101 S.M.CARB 0.1W R2219 ERJ6GEYJ222 S.M.CARB 0.1W R1569 ERJ6GEYJ101 S.M.CARB 0.1W R2220 ERJ6GEYJ183 S.M.CARB 0.1W R1570 ERJ6GEYJ101 S.M.CARB 0.1W R2221 ERJ6GEYJ393 S.M.CARB 0.1W R1571 ERJ6GEYJ101 S.M.CARB 0.1W R2222 ERJ6GEYJ103 S.M.CARB 0.1W R1572...
  • Page 23 Cct Ref Parts Number Description Cct Ref Parts Number Description 100nF R3212 ERJ6GEYJ223 S.M.CARB 0.1W C268 ECJ2VB1H104K ELECT 350V 100nF R3213 ERJ6GEYJ102 S.M.CARB 0.1W C270 ECJ2VB1H104K ELECT 350V R3214 ERJ6GEYJ683 S.M.CARB 0.1W C350 ECUV1H102JCX S.M. CAP 220nF R3215 ERJ6GEYJ302 S.M.CARB 0.1W C352 ECUV1H224ZFX...
  • Page 24 Cct Ref Parts Number Description Cct Ref Parts Number Description 4.7nF 220pF C809 ECKC2H472J CERAMIC 500V C1126 ECUV1H221JCX S.M. CAP 4.7nF 560pF C810 ECKC2H472J CERAMIC 500V C1127 ECUV1H561JCX S.M. CAP 220µF 27pF C811 ECOS2GA221CA ELECT 400V C1129 ECUV1H270JCX S.M. CAP 270pF C1501 ECUV1H271JCX...
  • Page 25 Cct Ref Parts Number Description Cct Ref Parts Number Description 10nF 5.6nF C1576 ECJ2VB1H103K ELECT 350V C2205 ECUV1H562KBX S.M. CAP 27pF 10nF C1577 ECUV1H270JCX S.M. CAP C2207 ECUV1H103KBX S.M. CAP 10nF 68nF C1578 ECJ2VB1H103K ELECT 350V C2208 ECUV1H683KBX S.M. CAP 10nF 680pF C1579...
  • Page 26 Cct Ref Parts Number Description Cct Ref Parts Number Description SWITCHES S802 ESB92S11B SWITCH S1251 EVQ21405R SWITCH S1252 EVQ21405R SWITCH S1253 EVQ21405R SWITCH S1254 EVQ21405R SWITCH S1255 EVQ21405R SWITCH RELAYS RL801 TSE1885-1 RELAY DIFFERENCES FOR MODEL TX--28PK20D MECHANICAL PARTS TNP8EE013BC E P.C.B.

  • Page 27: Schematic Diagrams

    SCHEMATIC DIAGRAMS FOR MODELS ZEICHENERKLÄRUNG FÜR MODELL TX-28PK20F TX-28PK20F TX-28PK20D TX-28PK20D (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 35 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...

  • Page 36: 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 37 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 38 F - BOARD TNP8EF007 TRAN’S Q1501 C3 Q1508 C1 Q1509 C2 Q1510 C2 Q1511 C1 Q1512 D1 Q1513 C1...
  • Page 39 P - BOARD TNP8EP017 DIODES D580 D581...
  • Page 40 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 41 Z - BOARD TNP8EZ003 TRAN’S Q2201 Q2202 Q2203 IC’S IC2201 IC2221 IC2302...
  • Page 42 NOTES...
  • Page 43 NOTES...

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