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Panasonic TX-28LD20F Service Manual
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Panasonic TX-28LD20F Service Manual

Panasonic TX-28LD20F Service Manual

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SPECIFICATIONS
(Information in brackets { } refer to TX-25LD20F)
Power Source:
220-240V a.c., 50Hz
Power Consumption:
121W
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:
28kV ±1kV
Picture Tube:
A66ECF50X82 66cm
{A59ECF50X82 59cm}
Audio Output:
2 x 15W (Music Power)
8Ω Impedance
Headphones
8Ω Impedance
Accessories supplied:
Remote Control
2 x R6 (UM3) Batteries
Dimensions:
Height:
596,5mm
Width:
778mm
Depth:
481mm
Net Weight:
32kg
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.
All manuals and user guides at all-guides.com
500mV rms 1kΩ
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 rms 10kΩ
1V p-p 75Ω
{550,5mm}
{730mm}
{478,5mm}
{27kg}
Colour Television
EURO-4H Chassis
TECHNISCHE DATEN
(Werte in klammern gelten { } nur fur TX-25LD20F)
Netzpannung:
220-240V a.c., 50Hz
Leistungsaufnahme:
121W
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:
28kV ±1kV
Bildrohre:
A66ECF50X82 66cm
{A59ECF50X82 59cm}
Ton Ausgangsleistung:
2 x 15W (Musikleistung)
Lautsprecher
8Ω Impedanz
Kopfhörer:
8Ω Impedanz
Mitgel. Zubehör:
Fernbedienung
2 x R6 (UM3) Batterien
Abmessungen:
Höhe:
596,5mm
Breite:
778mm
Tiefe:
481mm
Gewicht:
32kg
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-99082
TX-28LD20F
TX-25LD20F
500mV rms 1kΩ
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 rms 10kΩ
1V p-p 75Ω
{550,5mm}
{730mm}
{478,5mm}
{27kg}

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  • Page 2: 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 SELF CHECK ..............5 SELBSTDIAGNOSE ............5 ADJUSTMENT PROCEDURE ..........6 ABGLEICH ................6 WAVEFORM PATTERN TABLE .......... 7 SIGNAL TABELLE...............
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  • Page 4: Service Hints

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  • Page 5: Self Check

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  • Page 6: Adjustment Procedure

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  • Page 7: Waveform Pattern Table

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  • Page 8: Alignment Settings

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  • Page 9: Abgleichtabelle

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  • Page 10: Block Diagrams

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  • Page 11 All manuals and user guides at all-guides.com AUDIO BLOCK DIAGRAM TONSIGNAL BLOCKSCHEMA E - BOARD IC2101 AUDIO PROCESSOR IC251 TUNER AUDIO Q252 DACM_R 24 Q2102 OUTPUT HEADPHONE DACM_L 25 Q2103 L 11 Q103 Q251 X101 SC3_IN_L 37 SC3_IN_R 38 44 MONO IN X102 Q101 49 ANA_IN2+...
  • Page 12 All manuals and user guides at all-guides.com CONTROL BLOCK DIAGRAM STROMVERSORGUNGS BLOCKSCHEMA E - BOARD To Y2 SENSE F - BOARD TUNER IC1503 IC1504 L/L’ POS/NEG CONVERTER DEFLECTION IC601 PROCESSOR IC601 AV VIDEO SCL 1 SWITCH VIDEO IC2101 D_CTR_OUT0 SDA 1 PROCESSOR AUDIO PROCESSOR...
  • Page 13 All manuals and user guides at all-guides.com POWER SUPPLY BLOCK DIAGRAM STROMVERSORGUNGS BLOCKSCHEMA E - BOARD W - BOARD 5V SBY Q852 D867 Q855 D868 Q853 Q854 IC251 AUDIO D862 T802 RL801 R854 OUTPUT T801 D801 Line Filter Y - BOARD 150V 150V D850...

  • Page 14: Parts Location

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  • Page 15: Replacement Parts List

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  • Page 23 All manuals and user guides at all-guides.com Cct Ref Parts Number Description Cct Ref Parts Number Description C1525 ECJ2VB1H103K ELECT 350V Q) C2103 ECUV1H102JCX S.M. CAP C1526 ECEA1CKA100 ELECT —) C2104 ECUV1H102JCX S.M. CAP C1527 ECJ2VB1C104K ELECT 350V Q) C2105 ECUV1H102JCX S.M.
  • Page 24 TQF8E2903 MODEL LABEL MISCELLANEOUS COMPONENTS TPC8E4660-1 OUTER CARTON TPD8E657 TOP CUSHION TPD8E658 BOTTOM CUSHION I.C.s IC1103 XDG3-05LF EAROM * DIFFERENCES FOR MODEL TX-28LD20F MECHANICAL PARTS TKU8E00320 BACK COVER A66ECF50X82 C.R.T. TKY8E309 CABINET TLK8E05140 DEGAUSS COIL TNP8EE013AA E P.C.B. TQF8E2872 MODEL LABEL...
  • Page 25 All manuals and user guides at all-guides.com SCHEMATIC DIAGRAMS FOR MODELS ZEICHENERKLÄRUNG FÜR MODELL TX-28LD20F TX-28LD20F TX-25LD20F TX-25LD20F (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.

  • Page 26: Schematic Diagrams

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  • Page 27 All manuals and user guides at all-guides.com...
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  • Page 29 All manuals and user guides at all-guides.com...

  • Page 30: Conductor Views

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  • Page 32: Ansicht Der Leiterbahnen

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  • Page 33 All manuals and user guides at all-guides.com 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...
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  • Page 36 All manuals and user guides at all-guides.com W - BOARD TNP8EW002 I.C.’S IC1901 A2...

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Tx-25ld20f

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