Panasonic TX-20LA80F Service Manual
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Also See for TX-20LA80F:
- Operating instructions manual (24 pages) ,
- Service manual (28 pages)
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Service Manual
Specifications
Power Source:
220-240V AC, 50Hz
Power Consumption:
52W
Stand-by Power
Consumption:
1W
Aerial Impedance:
75Ω unbalanced, Coaxial Type
Receiving System:
PAL-B/G/I, D/K,
SECAM B/G, D/K, L/L'
PAL-525/60 (AV only)
M.NTSC (AV only)
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)
Operating Conditions:
5°C ÷ 35°C
Temperature:
5% ÷ 90% RH (non-condensing)
Humidity:
Intermediate Frequency:
Video/Audio
Video
38,9MHz, 33,9MHz
Audio
33,4MHz (B/G), 33,16MHz (A2)
33,05MHz (NICAM B/G, D/K, L)
32,4MHz (D/K), 32,66MHz (CZ STEREO)
40,4MHz (L'), 39,75MHz (L'NICAM),
32,35MHz,32,9MHz (NICAM)
Colour
34,47MHz (PAL)
34,5MHz, 34,65MHz (SECAM)
38,3MHz, 38,15MHz (SECAM L')
Colour LCD Television
GLP21L Chassis
Terminals:
AV1 IN
Video (21 pin)
Audio (21 pin)
RGB (21 pin)
OUT
Video (21 pin)
Audio (21 pin)
AV2 IN
S-Video IN
(4-pin)
Audio (RCAx2)
Video (RCAx1)
AUDIO OUT
Audio (RCAx2)
LCD screen:
L5EDD5L00011
640 x 480 VGA, 4:3
Visible Diagonal 508mm
Audio Output:
2x3W RMS
8Ω impedance
Headphones:
3,5mm, 8Ω Impedance
Accessories
supplied :
Remote Control
2 x R6 (UM3) Batteries
Dimensions:
Height:
Including TV stand
484mm
TV set only
443mm
Net weight:
7,5kg
Specifications are subject to change without notice.
Weights and dimensions shown are approximate.
ORDER No. PCZ0804036CE
TX-20LA80F
TX-20LA80FS
1V p-p 75Ω
500mV rms 10kΩ
0,7V p-p 75Ω AV1
1V p-p 75Ω
500mV rms 1kΩ
Y: 1V p-p 75Ω
C:0,3V p-p 75Ω
500mV rms 10kΩ
1V p-p 75Ω
500mV rms 1kΩ
Width:
Depth:
498mm
233mm
498mm
98mm
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Table of Contents
Related Manuals for Panasonic TX-20LA80F
Summary of Contents for Panasonic TX-20LA80F
- Page 1 ORDER No. PCZ0804036CE Service Manual Colour LCD Television TX-20LA80F TX-20LA80FS GLP21L Chassis Specifications Power Source: 220-240V AC, 50Hz Terminals: AV1 IN Video (21 pin) 1V p-p 75Ω Power Consumption: Audio (21 pin) 500mV rms 10kΩ Stand-by Power RGB (21 pin) 0,7V p-p 75Ω...
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Page 2: Table Of Contents
Contents SAFETY PRECAUTIONS ........... 3 SELF-CHECK ............. 8 GENERAL GUIDE LINES........3 ADJUSTMENT METHOD..........9 TOUCH – CURRENT CHECK....... 3 BLOCK DIAGRAMS..........10 PREVENTION OF ELECTROSTATIC DISCHARGE PARTS LOCATION........... 13 (ESD) TO ELECTROSTATICALLY SENSITIVE (ES) REPLACEMENT PARTS LIST........14 DEVICES ..............4 SCHEMATIC DIAGRAMS ......... -
Page 3: Safety Precautions
Safety Precautions General Guide Lines When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly installed. -
Page 4: Prevention Of Electrostatic Discharge
Prevention of Electrostatic Discharge (ESD) to Electrostatically Sensitive (ES) Devices Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and semiconductor "chip"... -
Page 5: About Lead Free Solder (Pbf)
About lead free solder (PbF) Note: Lead is listed as (Pb) in the periodic table of elements. In the information below, Pb will refer to Lead solder, and PbF will refer to Lead Free Solder. The Lead Free Solder used in our manufacturing process and discussed below is (Sn+Ag+Cu). That is Tin (Sn), Silver (Ag) and Copper (Cu) although other types are available. -
Page 6: Service Hints
Service Hints How to remove the Pedestal assembly Lay the main unit face down. (see Fig.5) Fig.5 Remove the 4 fixing screws and the pedestal assembly. (see Fig.6) SCREWS SCREWS Fig.6 How to remove the backcover Remove the 10 fixing screws. (see Fig.7) SCREWS SCREWS Fig.7... -
Page 7: Chassis Board Layout
Chassis Board Layout KEY CONTROL P-BOARD A-BOARD V-BOARD Board Name Function A-Board Main Board A-Board Tuner A-Board AV2 Terminal Key Control Key Control P-Board Mains Input, Power Switch P-Board Power Supply V-Board Remote Receiver, LED IR Setting Inspection Voltage Confirmation Confirm the following voltages: A board Normal mode... -
Page 8: Self-Check
Self-check is used to automatically check the bus lines and hexadecimal code of the TV set. To enter Self-Check mode, keep pressing the STATUS button on the remote control and press the down (-/v) button on the TV set. To exit Self Check, switch off the TV set at the power button. Panasonic GLP21L TV V2.06 TX-20LA80F Self Check Complete... -
Page 9: Adjustment Method
Adjustment Method How to enter Service 1 • Set the Bass to maximum position, set the Treble to minimum position then keep pressing the INDEX button on the remote control and press the down button (-/v) on the TV set, this will place the TV set into the Service Mode 1. Key Command •... -
Page 10: Block Diagrams
AV1 21 PIN SCART JK3000 TO LCD PANEL JK3002... - Page 11 AV1 21 PIN SCART JK3000 SERVICE CONNECTOR INVERTER...
- Page 12 F840 LCF´S LCF´S SERVICE...
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Page 13: Parts Location
Parts Location NOTE: The numbers on the exploded view below refer to the exploded view section of the Replacement Parts List. -
Page 14: Replacement Parts List
EUR765101C REMOTE CONTROL TQB0E0682U ENGLISH L0AA09B00005 SPEAKER I.C.s L5EDD5L00011 LCD PANEL TBLA3489 PEDESTAL METAL PLATE IC251 C0ZAZ0000193 AUDIO AMPLIFIER TBMA214 PANASONIC BADGE IC800 MR4030-7102 MAIN PS CONTROL TBX0E82701 POWER BUTTON IC840 C0DBEMC00044 REGULATOR TKP0E16001 CONNECTOR COVER IC861 C0DBEKH00002 REGULATOR TKX0E1601... - Page 15 Cct Ref Parts Number Description Cct Ref Parts Number Description D846 B0ACCK000005 DIODE D3866 B0ACCK000005 DIODE D849 B0JCPE000028 DIODE D3867 B0ACCK000005 DIODE D866 CMS16TE12LQ DIODE TRANSISTORS D872 B0ACCK000005 DIODE Q122 BC847B TRANSISTOR D875 B0HCMM000014 DIODE Q123 BC847B TRANSISTOR D876 B0HCMM000014 DIODE Q250 BC847B...
- Page 16 Cct Ref Parts Number Description Cct Ref Parts Number Description 2R2 Ω L257 J0JHC0000034 COIL R257 ERJ6GEYJ2R2V .125W 1K8 Ω L258 ELJPA100KFB COIL R258 ERJ3GEYJ182V 0.1W 1K Ω L800 EXCELSA39V COIL R259 ERJ3GEYJ102 0.1W 10K Ω L840 ELC10D100E CHOKE COIL R260 ERJ3GEYJ103 0.1W...
- Page 17 Cct Ref Parts Number Description Cct Ref Parts Number Description 330 Ω 22 Ω R878 ERJ6GEYJ331 S.M.CARB 0.1W R1545 ERJ3GEYJ220 0.1W 22 Ω 22 Ω R879 ERJ6GEYJ220 S.M.CARB 0.1W R1546 ERJ3GEYJ220 0.1W 82K Ω 100 Ω R880 ERJ3GEYJ823 0.1W R1548 ERJ3GEYJ101 0.1W 100K Ω...
- Page 18 Cct Ref Parts Number Description Cct Ref Parts Number Description 47K Ω 10K Ω R3806 ERJ3GEYJ473V S.M.CARB 0.1W R3880 ERJ6GEYJ103 S.M.CARB 0.1W 220 Ω 82K Ω R3807 ERJ3GEYJ221 0.1W R3881 ERJ6GEYJ823 S.M.CARB 0.1W 1M Ω 10K Ω R3808 ERJ3GEYJ105 0.1W R3882 ERJ3GEYJ103 0.1W...
- Page 19 Cct Ref Parts Number Description Cct Ref Parts Number Description C847 ECJ2VB1E823K S.M.CAP 82nF C1529 ECJ1VB1H104 S.M.CAP 100nF C848 EEUFM1V102B ELECT 1000µF C1530 ECJ1VB1H103 S.M.CAP 10nF C849 F1J1H105A830 S.M.CAP 1000nF C1531 ECJ1VC1H100D S.M.CAP 10pF C850 ECJ1VB1C105K 1000nF C1532 ECJ2VB1C104K S.M.CAP 100nF C851 ECJ1VB0J225K...
- Page 20 Cct Ref Parts Number Description Cct Ref Parts Number Description C3807 EEUFC1V101B ELECT 100µF SWITCHES C3808 F1K1H2250001 S.M.CAP 2200nF SW800 ESB92DA1B SWITCH C3809 ECJ2FB1H473K S.M.CAP 47nF SW1070 EVQPC105K SWITCH C3810 F1K1H2250001 S.M.CAP 2200nF SW1071 EVQPC105K SWITCH C3811 F1K1H2250001 S.M.CAP 2200nF SW1072 EVQPC105K SWITCH...
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Page 21: Schematic Diagrams
Schematic Diagrams IMPORTANT SAFETY NOTICE Components identified by mark have special characteristics important for safety. When replacing any of these components, use only manufacturers' specified parts. NOTE RESISTOR All resistors are carbon ¼W resistor, unless marked otherwise. Unit of resistance is OHM (Ω) (k=1,000, M=1,000,000) CAPACITORS All capacitors are ceramic 50V unless marked otherwise. -
Page 25: Conductor Views
Conductor Views A-BOARD TNP0EA008 - top TRAN’S D875 Q122 D876 Q123 D877 Q250 D881 Q251 D1101 Q253 D1102 Q254 D3863 Q256 D3864 Q257 D3865 Q873 D3866 Q952 D3867 Q1100 Q1217 IC’S Q1700 IC251 Q1701 IC861 Q3205 IC862 Q3860 IC881 Q3861 IC1120 Q3862 IC1500... - Page 26 A-BOARD TNP0EA008 - bottom TRAN’S D891 Q255 D893 Q865 D894 Q872 D1700 Q881 TP’S Q882 Q883 TP005 Q890 TP017 Q1212 TP019 Q3202 TP020 TP023 DIODE’S TP024 D250 TP025 D872 TP029 D878 TP030 D879 TP801 D890...
- Page 27 P-BOARD TNP0EP008 TRAN’S TP3804 A4 D3817 Q800 TP3805 C3 D3818 Q802 D3819 Q840 IC’S D3820 Q841 IC800 D3821 Q842 IC840 D3822 Q843 IC3800 D3823 Q844 IC3801 D3824 Q3800 IC3802 D3825 Q3801 D3826 Q3802 DIODE’S D3827 Q3803 D842 D3828 Q3804 D846 D3829 Q3805 D849...
- Page 28 V-BOARD TNP0EV008 - top DIODE’S D1051 D1062 IC’S RM1050 A2...