Panasonic TX-20LB5F, Service Manual

Page 1: ...60 Playback of NTSC tape from some PAL video recorders VCR M NTSC Playback From M NTSC video recorders VCR NTSC AV input only Playback From NTSC video recorders VCR Aerial ear UHF VHF Operating Conditions Temperature 5 35 Humidity 5 90 RH non condensing Connection Terminals AV1 Scart connecter 21 Pin socket Audio Video in Audio Video out RGB in AV2 VIDEO RCA PIN Type 1 S VIDEO Mini DIN 4 pin AUDIO...

Page 2: ...r technicians only and is not designed for use by the general public It does not contain warnings or cautions to advise non technical individuals of potential dangers in attempting to service a product Products powered by electricity should be serviced or repaired only by experienced professional technicians Any attempt to service or repair the product or products dealt with in this service inform...

Page 3: ...rk 4 Check each exposed metallic part and measure the voltage at each point 6 The potential at any point TOUGH CURRENT expressed as voltage U1 and U2 does not exceed the following values For a c U1 35V peak and U2 0 35V peak For d c U1 1 0V Note The limit value of U2 0 35V peak for a c and U1 1 0V for d c correspond to the values 0 7 mA peak a c and 2 0 mA d c The limit value U1 35V peak for a c c...

Page 4: ...cted can generate electrical charge sufficient to damage ES devices 5 Do not use freon propelled chemicals These can generate electrical chages sufficient to damage ES devices 6 Do not remove a replacement ES device from its protective package until immediately before you are ready to install it Most replacement ES devices are packaged with leadse electrically shorted together by conductive foam a...

Page 5: ...4 3 Chassis Board Layout Board Name Function A Board MAIN PCB B Board INVE R TE R PCB C Board AV PCB D Board IR LE D PCB E Board CONTR OL PCB ...

Page 6: ... down the main unit so that the rear cover faces upward 2 Remove the fixing screw 4pcs 3 Remove the hinge cover 4 2 Removing the rear cover 1 Remove the tilt base See 4 1 2 Remove the fixing screw 8pcs 3 Remove the rear cover as pushing clips 2 point clip ...

Page 7: ... the E Board 1 Remove the switch unit See 4 3 2 Remove the fixing screws 2pcs 3 Remove the E Board 4 5 Removing the C Board 1 Remove the rear cover See 4 2 2 Disconnect the coupler C1 3 Remove the fixing screws 2pcs 4 Remove the C Board 4 6 Removing the IR LED unit 1 Remove the rear cover See 4 2 2 Disconnect the coupler D1 3 Remove the fixing screws 2pcs 4 Remove the D Board ...

Page 8: ...ear cover See 4 2 2 Remove the fixing screws 8pcs 3 Disconnect the Speaker connecters S1 4pcs 4 Remove the speaker units 4 9 Removing the Shield pcb assy 1 Remove the fixing screws 8pcs 2 Disconnect the coupler C1 D1 E1 S1 3 Remove the Shield pcb assy 4 10 Removing the Shield case 1 Remove the Shield pcb assy See 4 9 2 Remove the fixing screws 8pcs 3 Remove the Shield case ...

Page 9: ...Remove the Shield pcb assy See 4 10 2 Disconnect the coupler A1 A2 B1 B2 B3 3 Remove the fixing screws 8pcs 4 Remove the A Board B Board 4 12 Removing the LCD panel 1 Remove the A Board B Board See 4 11 2 Remove the fixing screws 4pcs 3 Remove the LCD Panel ...

Page 10: ... BLE Tilt 7 NVM EDIT BLE Gain 1 RESET TV SET BLE Static 3 BLE Brf 3 2 Service Mode 2 DATA REMARK 10 60 42 46 0 No 0 3 40 1 3 TEXT 0 N 1 F 2 T 3 FT AGCMD 0 3 BRIGHTNESS CONTRAST PKCF SET FOR UK 0 PHIL 1 DW TUNER AGC ADJ1 SIZE 0 17 W 1 20 N EXTERNAL CONTRAST VERTICAL GEOMETRY EXTERNAL BRIGHTNESS MENU DRX BLACK LEVEL EXPANDER ADDITIONAL SETTINGS VCTi MEASUREMENT HORIZONTAL GEOMETRY Panel MEASUREMENT ...

Page 11: ...2 IC12 F 5 Q14 D 3 IC13 C 4 Q15 D 3 IC14 A 3 Q16 E 4 IC15 B 5 Q17 F 1 IC16 B 2 Q18 F 1 IC17 D 4 Q21 E 2 IC18 A 4 Q23 D 3 IC19 E 4 Q24 F 4 IC20 A 2 Q25 C 2 IC21 E 3 Q26 C 2 IC22 B 3 Q27 F 4 IC23 C 3 Q31 B 2 IC24 A 4 Q32 B 2 IC25 E 4 Q33 B 2 IC26 C 2 Q34 B 2 IC27 E 4 Q35 B 2 IC29 D 3 Q36 C 2 IC30 E 5 Q37 C 2 IC31 C 2 Q38 C 2 IC33 C 2 Q39 C 2 IC34 B 2 Q40 C 2 IC35 E 4 Q41 C 2 IC38 B 4 IC39 B 5 IC40 B...

Page 12: ...11 Conductor Views 6 2 MAIN PCB BOTTOM ...

Page 13: ... Indicates the major signal flow Video Audio 10 This schematic diagram is the latest at the time of printing and subject to change without notice Z T m NP M Remarks 1 The Power Circuit contains a circuit area which uses a separate power supply to isolate the earth connection The circuit is defined by HOT and COLD indications in the schematic diagram Take the follwing precautions All circuits excep...

Page 14: ... Sound Audio MUX L R L R RGB CVBS R G B TV H V sync TV MST9883A ADC RGB 24bit TXD RXD Main L Main R HP TDA1517 Loc IC3 TDA1517 Loc IC30 Audio Audio SPEAKER Left SPEAKER Right Headphone L R Signal Block GCLK GVS GHS 24bit MDIN 150 Deinterlace LOC IC22 SDRAM RGB Signal 24bit VVS VHS VCLK 24bit Panel Crystal FLASH PW113 LOC IC13 V PORT D PORT G PORT VPEN VFIELD 7 2 Signal Block Diagram ...

Page 15: ...14 Block and Schematic Diagrams 7 3 Power Schematic Diagram ...

Page 16: ...15 Block and Schematic Diagrams 7 4 VCTI Schematic Diagram ...

Page 17: ...16 Block and Schematic Diagrams 7 5 Memory AMP Schematic Diagram ...

Page 18: ...17 Block and Schematic Diagrams 7 6 AD9883 Schematic Diagram ...

Page 19: ...18 Block and Schematic Diagrams 7 7 Deinterlace Schematic Diagram ...

Page 20: ...19 Block and Schematic Diagrams 7 8 Image Processor Schematic Diagram ...

Page 21: ...20 Block and Schematic Diagrams 7 9 LVDS Key Input Schematic Diagram ...

Page 22: ...9 7172401212 SCREW TAPTITE 8 TT2 TRS 4X12 MFZN BK Designed by Checked by Inspected by Approved by J H BAE NA G H KIM S D PARK 2004 10 04 DLP 20D4AHS DEVELOPMENT DRAWING 48500CKK SL 110P 2 24 11 17 8 12 1 26 22 20 27 21 15 18 30 4 25 SCREW MACHINE MAIN PCB INVERTOR PCB 20 21 7008300611 WAS 3X6 MFZN 1 8 1 31 32 33 13 14 3 5 6 9 10 16 19 23 28 7 7178301011 SCREW TAPPTITE TT2 WAS 3X10 MFZN 7178301011 ...

Page 23: ...22 Parts Location Mechanical Replacement Parts List 8 2 Packing Exploded View ...

Page 24: ...CASE F002 5FWPS1022L FUSE WIDE TL 250V 1A CASE LOC PARTCODE PARTNAME DESCRIPTION REMARK IC12 1TS0P34838 IC PREAMP TSOP34838SJ IC29 149531PYFP IC TV PROCESSORS VCT4953I PY F1 IC3 1TDA1517PP IC TDA1517P IC30 1TDA1517PP IC TDA1517P IC31 124LC16B1B IC MEMORY 24LC16B1B J2 4859295420 CONN WAFER 4602 04MV2 60 1 PLUG 4P ST J2A 4859295620 CONN WAFER 4605 2FV2 1 JUMPER 2P 2 54 J2B 4859295620 CONN WAFER 4605...

Page 25: ...A C CHIP CERA 50V X7R 0 1MF K 1608 C272 HCBK104KBA C CHIP CERA 50V X7R 0 1MF K 1608 LOC PARTCODE PARTNAME DESCRIPTION REMARK C274 HCBK104KBA C CHIP CERA 50V X7R 0 1MF K 1608 C276 HCBK104KBA C CHIP CERA 50V X7R 0 1MF K 1608 C278 HCBK104KBA C CHIP CERA 50V X7R 0 1MF K 1608 C279 HCBK104KBA C CHIP CERA 50V X7R 0 1MF K 1608 C28 HCBK104KBA C CHIP CERA 50V X7R 0 1MF K 1608 C280 HCBK104KBA C CHIP CERA 50V...

Page 26: ...CHIP 1 10 1K OHM J 1608 LOC PARTCODE PARTNAME DESCRIPTION REMARK R250 HRFT101JBA R CHIP 1 10 100 OHM J 1608 R254 HRFT000 BA R CHIP 1 10 0 OHM 1608 R257 HRFT102JBA R CHIP 1 10 1K OHM J 1608 R258 HRFT000 BA R CHIP 1 10 0 OHM 1608 R259 HRFT000 BA R CHIP 1 10 0 OHM 1608 R261 HRFT472JBA R CHIP 1 10 4 7K OHM J 1608 R262 HRFT562JBA R CHIP 1 10 5 6K OHM J 1608 R263 HRFT562JBA R CHIP 1 10 5 6K OHM J 1608 R...

Page 27: ...0MF CM 8010 C30 HCBK104KBA C CHIP CERA 50V X7R 0 1MF K 1608 C300 HCELF471ME C CHIP ELECTRO 16V 470MF CM 8010 LOC PARTCODE PARTNAME DESCRIPTION REMARK C301 HCELF471ME C CHIP ELECTRO 16V 470MF CM 8010 C303 HCELH100MC C CHIP ELECTRO 25V 10MF CM 4052 C304 HCELH100MC C CHIP ELECTRO 25V 10MF CM 4052 C305 HCELH100MC C CHIP ELECTRO 25V 10MF CM 4052 C306 HCELH100MC C CHIP ELECTRO 25V 10MF CM 4052 C307 HCEL...

Page 28: ...HFFMMZ400A F CHIP FERRITE BEAD 40 OHM MMZ 2012S L76 HFFMMZ400A F CHIP FERRITE BEAD 40 OHM MMZ 2012S L77 HLC479M02D L CHIP COIL 4 7UH M SLF0628 L82 HLB300M04A L CHIP BEAD 30 OHM MPZ 2012 L83 HLB300M04A L CHIP BEAD 30 OHM MPZ 2012 L9 HFFMMZ202A F CHIP FERRITE BEAD 2000 OHM MMZ 2012Y LOC PARTCODE PARTNAME DESCRIPTION REMARK LP1 HFRMZA600A F CHIP BEAD ARRARY 60 OHM MZA 3216Y LP2 HFRMZA600A F CHIP BEAD...

Page 29: ...HIP 1 10 1 2K OHM J 1608 R43 HRFT151JBA R CHIP 1 10 150 OHM J 1608 R44 HRFT330JBA R CHIP 1 10 33 OHM J 1608 R45 HRFT103JBA R CHIP 1 10 10K OHM J 1608 R46 HRFT271JBA R CHIP 1 10 270 OHM J 1608 R47 HRFT752JBA R CHIP 1 10 7 5K OHM J 1608 R48 HRFT103JBA R CHIP 1 10 10K OHM J 1608 LOC PARTCODE PARTNAME DESCRIPTION REMARK R50 HRFT151JBA R CHIP 1 10 150 OHM J 1608 R51 HRFT330JBA R CHIP 1 10 33 OHM J 1608...