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Panasonic TX-22LT3 Service Manual

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SPECIFICATIONS
Power Source
AC 100~240V, 50/60Hz
Power Consumption
Average use: 67W
Stand-by condition: 1.8W
TV set DC 15V, 3.8 A max.
LCD
22-inch (558 mm), 16:9 aspect ratio LCD panel
Screen Size
486.8mm(W) x 273.6mm(H)
Channel Capability-100
UHF : 21-68
Sound
Speaker
Ø4cm, 2pcs, 16
Audio Output
11W (3.0W+3.0W+5.0W (Woofer)), 10%THD
Headphones
M3(3.5 mm) Jack x 1
Receiving System/ Band name
PAL I
UHF E21 - 68
PAL 525/60
ORDER NO. ITD0310055C2
1
LCD TV
TX-22LT3
LH12 Chassis

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  • Page 1 ORDER NO. ITD0310055C2 LCD TV TX-22LT3 LH12 Chassis SPECIFICATIONS Power Source AC 100~240V, 50/60Hz Power Consumption Average use: 67W Stand-by condition: 1.8W TV set DC 15V, 3.8 A max. 22-inch (558 mm), 16:9 aspect ratio LCD panel Screen Size 486.8mm(W) x 273.6mm(H)
  • Page 2 Playback of NTSC tape from some PAL video recorders (VCR) M.NTSC Playback from M.NTSC Videorecorders (VCR) NTSC (AV input only) Playback from NTSC Videorecorders (VCR) Aerial-Rear Operating Conditions Temperature: 41°F-95°F(5-35°C) Humidity: 5%-90% RH (non-condensing) Connection Terminals AV1 (Scart connecter) 21 Pin socket (Audio/Video in, Audio/Video out, RGB in, Q-Link) AV2 (Scart connecter) 21 Pin socket (Audio/Video in, Audio/Video out, S-Video...
  • Page 3 1. 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. 2. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly installed.
  • Page 4 2. Prevention of Electro Static 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 transistorsand semiconductor "chip" components.
  • Page 5 electrical charges 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 leads electrically shorted together by conductive foam, alminum foil or comparableconductive material).
  • Page 6 If the CCU ports have been checked and found to be incorrect or not located then “--” will appear in place of “O.K.”. Display Ref. No. Description P.C.B. IC1004 EEPROM DG-Board GC2M IC9001 Global Core DG-Board IC9007 RGB A/D Converter DG-Board IC4001 AVSW...
  • Page 7 Board Name Function A-Board Main (DC Power Supply, Audio, Input Select, AV Connector) B - Board Tuner DG - Board Global Core, RGB Processor, Micro Processor, Pixel Converter) K - Board Switch PD - Board Back Light Inverter PH - Board Back Light Inverter V - Board RM, LED...
  • Page 8 4. Remove the fixing screw (1pcs). 5. Remove the hinge cover. 6. Remove the fixing screws (4pcs). 7. Remove the tilt base. 5.2. Removing the rear cover 1. Remove the tilt base. (See 5.1.) 2. Remove the fixing screws (9pcs).
  • Page 9 3. Remove the rear cover. 5.3. Removing the shield plate 1. Remove the rear cover. (See 5.2.) 2. Remove the fixing screws (8psc). 3. Remove the shield plate. 5.4. Removing the PH shield plate and the PD shield plate 1. Remove the shield plate. (See 5.3.) 2.
  • Page 10 5.5. Removing the speaker box 1. Remove the shield plate (See 5.3.) 2. Remove the fixing screws A (2pcs) and B (2pcs). 3. Remove the angle. 4. Disconnect the coupler(A9), and unlock the cable clamper and hook to free the cable 5.
  • Page 11 5.7. Removing the switch unit 1. Remove the shield plate. (See 5.3.) 2. Disconnect the coupler (K1). 3. Remove the fixing screws (2pcs). 4. Remove the switch unit. 5.8. Removing the K-Board 1. Remove the switch unit. (See 5.7.) 2. Remove the fixing screws (2psc). 3.
  • Page 12 2. Remove the V-Board. (See 5.6.) 3. Disconnect the couplers (PH1, PH2, PD1, PD2 and DG6900), and unlock the cable clampers to free the cable. 4. Remove the chassis. - Disconnecting flexible cable from the coupler. / Lift up both ends of the cable lock (brown colored) simultaneously to release the locking.
  • Page 13 5.10. Removing the tuner cover and the terminal cover 1. Remove the rear cover. (See 5.2.) 2. Remove the tuner cover. *The tuner cover lever is pulled up and remove the tuner cover. 3. Remove the fixing screws (4pcs). 4. Remove the terminal cover. *A hooks is removed.
  • Page 14 5.12. Removing the A-Board 1. Remove the shield plate. (See 5.3.) 2. Remove the angle. (See 5.5.) 3. Remove the terminal cover. (See 5.10.) 4. Remove B-Board. (See 5.11.) 5. Disconnect the couplers (A1,A2, A3 and A5). 6. Disconnect the coupler (A9), and unlock the cable clamper to free the cable.
  • Page 15 5.14. Removing the DG-Board 1. Remove the shield plate. (See 5.3.) 2. Disconnect the couplers (DG1, DG2, DG3 and DG6900). *When removing coupler (DG6900), cautions are required for the handling of a connector. (See 5.9.) 3. Remove the fixing screws (4pcs). 4.
  • Page 16 5.16. Removing the PD-Board 1. Remove the rear cover. (See 5.2.) 2. Remove the PD shield plate. (See 5.4.) 3. Disconnect the couplers (PD1, PD2, PD3 and PD5). 4. Remove the fixing screw (1pcs). 5. Remove the PD-Board. 5.17. Removing the LCD panel 1.
  • Page 17 6. Service Mode Function MPU controls the functions switching for each IICs through IIC bus in this chassis. The following setting and adjustment can be adjusted by remote control in Service Mode. 6.1. How to enter SERVICE 1 1. In sound menu, set BASS to MAXIMUM, and set TREBLE to MINIMUM.
  • Page 18 6.3. Option Description...
  • Page 20 7. Conductor Views 7.1. A-Board 7.2. DG-Board 7.3. PD-Board 7.4. PH-Board 7.5. B, H1, H2, K, P1 and P2-Board 8. Block and Schematic Diagrams...
  • Page 21 8.1. Schematic Diagram Notes 8.2. Power Block Diagram 8.3. Signal Block Diagram 8.4. A-Board (1 of 3) Schematic Diagram 8.5. A-Board (2 of 3), B-Board, K-Board and V-Board Schematic...
  • Page 22 Diagram 8.6. A-Board (3 of 3) Schematic Diagram 8.7. DG-Board (1 of 5) Schematic Diagram 8.8. DG-Board (2 of 5) Schematic Diagram 8.9. DG-Board (3 of 5) Schematic Diagram 8.10. DG-Board (4 of 5) Schematic Diagram 8.11. DG-Board (5 of 5) Schematic Diagram 8.12.
  • Page 25 9.2. Packing Exploded View...
  • Page 26 9.3. Mechanical Replacement Parts List...
  • Page 27 Ref. No. Part No. Part Name & Description Remarks EAB512A2 SPEAKER BOX EUR511256 REMOCON TRANSMITTER K2CT3AA00002 AC POWER CORD K2CR2DA00007 L5EDD5M00001 LCD PANEL N0JZHK000012 AC ADAPTOR TBXA37801 POWER BUTTON TBXA37903 CONTROL BUTTON TEJA078 LOCK HINGE(LEFT) TEJA079 LOCK HINGE(RIGHT) TKKC5152 LED TREND SHAFT TKKH5089-1 RECIEVER COVER TKKL5141-3...
  • Page 28 10.1. Replacement Parts List Notes 10.2. Electrical Replacement Parts List...
  • Page 29 Ref. No. Part No. Part Name & Description Pcs Remarks TJSF18208 8P CONNECTOR K1MN08A00040 K1MN25A00030 25P CONNECTOR K1MN50A00005 50P CONNECTOR TJSF27608 8P CONNECTOR K1MN08B00093 K1KA09A00064 9P CONNECTOR K1KA15A00064 15P CONNECTOR TJS118650 8P CONNECTOR K1KA08A00178 K1KB09B00019 9P CONNECTOR K1KB15B00013 15P CONNECTOR C001 ECJ2VB1C104K C 0.1UF, K, 16V...
  • Page 30 Ref. No. Part No. Part Name & Description Pcs Remarks C823 ECJ2XB1H104K C 0.1UF, K, 50V C824 ECJ2VF1H103Z C 0.01UF, Z, 50V C826,27 ECJ2VF1H103Z C 0.01UF, Z, 50V C828 F2A1E471A102 E 470UF, 25V C829 F2A1E471A096 E 470UF, 25V C830 F2A1C6810005 E 680UF, 16V C832 F2A0J122A139...
  • Page 31 Ref. No. Part No. Part Name & Description Pcs Remarks C1031 ECJ1XC1H151J C 150PF, J, 50V C1033 ECJ1XF1C104Z C 0.1UF, Z, 16V C1034 ECJ1XC1H220J C 22PF, J, 50V C1035 ECJ1XB1H102K C 1000UF, Z, 50V C1036 ECJ1XF1C104Z C 0.1UF, Z, 16V C1037 ECJ1VB1H221K C 220UF, K, 50V...
  • Page 32 Ref. No. Part No. Part Name & Description Pcs Remarks C2202 ECJ2XB1H682K C 6800PF, K, 50V C2203 ECA1HEN2R2 E 2.2UF, 50V C2204 F2A1H2R2A120 E 2.2UF, 50V C2206 ECA1VM221 E 220UF, 35V C2207 F2A1E471A105 E 470UF, 25V C2208 ECJ2YF1C225Z C 22PF, Z, 16V C2209 ECJ2VF1H104Z C 0.1UF, Z, 50V...
  • Page 33 Ref. No. Part No. Part Name & Description Pcs Remarks C4039 EEVHP1C100R E 10UF, 16V C4046-50 ECJ2XC1H181J C 180PF, J, 50V C4051 ECJ2VF1H104Z C 0.1UF, Z, 50V C4052-54 ECA1CEN100 E 10UF, 16V C4056,57 ECJ2VF1H104Z C 0.1UF, Z, 50V C4101-04 ECJ2XC1H561J C 560PF, J, 50V C4105,06 ECJ2XC1H271J...
  • Page 34 Ref. No. Part No. Part Name & Description Pcs Remarks C6066-69 ECJ1XF1C104Z C 0.1UF, Z, 16V C6071,72 ECJ1XF1C104Z C 0.1UF, Z, 16V C6073 EEVHB0J101 E 100UF, 6.3V EEVHB0J101P C6074-76 ECJ1XF1C104Z C 0.1UF, Z, 16V C6077 ECJ1VF1A105Z C 1UF, Z, 10V C6078 ECJ1VB1H332K C 3300PF, K, 50V...
  • Page 35 Ref. No. Part No. Part Name & Description Pcs Remarks C9077-79 ECJ1VF1H103Z C 0.01UF, Z, 50V C9081 ECJ1XF1C104Z C 0.1UF, Z, 16V C9082-87 ECJ1VF1A105Z C 1UF, Z, 10V C9088 ECJ1XC1H470J C 47PF, J, 50V C9089-91 ECJ1XF1C104Z C 0.1UF, Z, 16V C9092 ECJ1VF1H103Z C 0.01UF, Z, 50V...
  • Page 36 Ref. No. Part No. Part Name & Description Pcs Remarks C9188 ECJ1XB1C104K C 0.1UF, Z, 16V C9190 ECJ1VF1A105Z C 1UF, Z, 10V C9191,92 ECJ1XC1H330J C 33PF, J, 50V C9193 EEVHB0G101 E 100UF 4V C9196,97 ECJ1VB1H103K C 0.01UF, K, 50V C9199 ECJ1XF1C104Z C 0.1UF, Z, 16V C9201...
  • Page 37 Ref. No. Part No. Part Name & Description Pcs Remarks D2001 M1FS4 DIODE D2002 MA111 DIODE MA2J111 D2003 MA152 DIODE D2004 MA157A DIODE MA3X157A D2005 MA111 DIODE MA2J111 D2006,07 MA8140M ZENER DIODE MAZ81400M D2008 MA152 DIODE D2200 M1FS4 DIODE D3001-03 MA8056-M DIODE MAZ80560M...
  • Page 38 Ref. No. Part No. Part Name & Description Pcs Remarks IC4110 C0JBAS000185 IC6001,02 C0CBCBD00005 IC6003 C1AB00001834 IC6004 C1ZBZ0002178 IC9001 C1AB00001826 IC9002 C0JBBZ000281 IC9003,04 C0CBCBD00005 IC9006 C3HBKZ000001 IC9007 C1AB00001834 IC9008 MM1065ZMR LINEAR IC C0CBABB00029 IC9009,10 C0CBCAD00006 IC9012 TC7WU04FU C0JBAB000339 JK801 K2EE2B000003 PLUG JK4000 K1FB121B0011...
  • Page 39 Ref. No. Part No. Part Name & Description Pcs Remarks L890 TALL08N470KA INDUCTION COIL G0A470GA0011 L891 TALL08N101KA INDUCTION COIL G0A101EA0008 L1001 G1C4R7M00016 INDUCTION COIL L1002 ELJPA180KB CHIP INDUCTOR L1003 G1C3R3MA0061 INDUCTION COIL L1004 G1C330K00017 INDUCTOR COIL L1005 G1C4R7M00016 INDUCTION COIL L1007 ELJFA8R2KB CHIP INDUCTOR...
  • Page 40 Ref. No. Part No. Part Name & Description Pcs Remarks K1MN21A00028 21P CONNECTOR PH1,H2 K1KA03B00065 3P CONNECTOR K1MN10A00031 10P CONNECTOR Q201 UN5219 TRANSISTOR Q202 UN5211 TRANSISTOR UNR5211 Q601,02 B1DBED000001 TRANSISTOR Q603 2SD601A TRANSISTOR 2SD0601A Q604 UN2113 TRANSISTOR UNR2113 Q605-08 B1BBFF000003 TRANSISTOR Q801 B1DDED000003...
  • Page 41 Ref. No. Part No. Part Name & Description Pcs Remarks Q6900 B1DHDC000021 TRANSISTOR Q6901 UN5211 TRANSISTOR UNR5211 Q9001-03 2SC2412K TRANSISTOR Q9004-06 2SB709A TRANSISTOR 2SB0709A Q9010-12 2SC2412K TRANSISTOR Q9014,15 2SD601A-R TRANSISTOR 2SD0601AR Q9017 2SB709A TRANSISTOR 2SB0709A Q9019-21 2SB709A TRANSISTOR 2SB0709A Q9022 2SD601A-R TRANSISTOR 2SD0601AR...
  • Page 42 Ref. No. Part No. Part Name & Description Pcs Remarks R638 ERJ12YJ103 M 10KOHM,J, 1/2W ERJ12YJ103U R660,61 ERJ12NF2000 M 20 OHM, , 1/2W R801 ERJ6GEYJ103 M 10KOHM,J,1/10W R802 ERJ6GEYJ153 M 15KOHM,J,1/10W R803 ERJ6GEYJ102 M 1KOHM,J,1/10W R804 ERJ6ENF1781 M1.78KOHM, 1/10W R805 ERJ6ENF1102 M 11KOHM, 1/10W R806...
  • Page 43 Ref. No. Part No. Part Name & Description Pcs Remarks R1016 EXB38V680J RESISTOR ARRAY R1018 ERJ3GEYJ101 M 100 OHM,J,1/16W D0GB101JA002 R1019 ERJ3GEYJ0R00 M 0 OHM, 1/16W R1020 ERJ3GEYJ103 M 10KOHM,J,1/16W R1023 ERJ3GEYJ225V M 2.2MOHM,J,1/16W R1024 ERJ3GEYJ392 M 3.9KOHM,J,1/16W R1027 EXB38V680J RESISTOR ARRAY R1028 ERJ3GEYJ473...
  • Page 44 Ref. No. Part No. Part Name & Description Pcs Remarks R1096,97 ERJ3GEYJ101 M 100 OHM,J,1/16W D0GB101JA002 R1099 ERJ3GEYJ473 M 47KOHM,J,1/16W R1101 ERJ3GEYJ473 M 47KOHM,J,1/16W R1102 EXB38V473J RESISTOR ARRAY R1105 ERJ3GEYJ0R00 M 0 OHM, 1/16W R1107 ERJ3GEYJ103 M 10KOHM,J,1/16W R1111 ERJ6GEYJ562 M 5.6KOHM,J,1/10W R1112,13 ERJ3GEYJ103...
  • Page 45 Ref. No. Part No. Part Name & Description Pcs Remarks R2529,30 ERJ6GEYJ104 M 100KOHM,J,1/10W R2532 ERJ6GEYJ472 M 4.7KOHM,J,1/10W R3001 ERJ3GEYJ103 M 10KOHM,J,1/16W R3002,03 ERJ3GEYJ101 M 100 OHM,J,1/16W D0GB101JA002 R3004,05 ERJ3GEYJ103 M 10KOHM,J,1/16W R3006-10 ERJ3GEYJ473 M 47KOHM,J,1/16W R3012 ERJ3GEYJ473 M 47KOHM,J,1/16W R3013-20 EXB38V473J RESISTOR ARRAY...
  • Page 46 Ref. No. Part No. Part Name & Description Pcs Remarks R4109,10 ERJ6GEYJ333 M 33KOHM,J,1/10W R4111 ERJ6GEY0R00 M 0 OHM, 1/10W R4112 ERJ6ENF3301 M 3.3KOHM, 1/10W R4113 ERJ6GEYJ472 M 4.7KOHM,J,1/10W R4116 ERJ6GEYJ102 M 1KOHM,J,1/10W R4117 ERJ6ENF3301 M 3.3KOHM, 1/10W R4126,27 ERJ6GEYJ104 M 100KOHM,J,1/10W R4150,51 ERJ6GEYJ333...
  • Page 47 Ref. No. Part No. Part Name & Description Pcs Remarks R6060 ERJ3GEYJ102 M 1KOHM,J,1/16W R6061 ERJ3GEYJ0R00 M 0 OHM, 1/16W R6062 ERJ3GEYJ104 M 100KOHM,J,1/16W R6063 ERJ3GEYJ0R00 M 0 OHM, 1/16W R6064 ERJ3GEYJ392 M 3.9KOHM,J,1/16W R6065 ERJ3GEYJ0R00 M 0 OHM, 1/16W R6066 ERJ3GEYJ104 M 100KOHM,J,1/16W...
  • Page 48 Ref. No. Part No. Part Name & Description Pcs Remarks R9083 ERJ6ENF51R0 M0.51KOHM, 1/10W R9084 ERJ3GEYJ221 M 220 OHM,J,1/16W R9085 ERJ3GEYJ0R00 M 0 OHM, 1/16W R9086 ERJ3EKF1800 M 180 OHM, 1/16W R9087 ERJ6ENF51R0 M0.51KOHM, 1/10W R9088 ERJ6ENF68R0 M 68 OHM, 1/10W R9089 ERJ6ENF82R0 M 82 OHM, 1/10W...
  • Page 49 Ref. No. Part No. Part Name & Description Pcs Remarks R9149,50 ERJ3GEYJ0R00 M 0 OHM, 1/16W R9154 ERJ3GEYJ103 M 10KOHM,J,1/16W R9155 ERJ3GEYJ153 M 15KOHM,J,1/16W R9156 ERJ3GEYJ103 M 10KOHM,J,1/16W R9157 ERJ3GEYJ153 M 15KOHM,J,1/16W R9158 ERJ3GEYJ103 M 10KOHM,J,1/16W R9159 ERJ3GEYJ153 M 15KOHM,J,1/16W R9161 ERJ3GEYJ223 M 22KOHM,J,1/16W...
  • Page 50 ZA601-03 K4ZZ01000121 EARTH LUG Ref. No. Part No. Part Name & Description Pcs Remarks ZA661,62 K4ZZ01000121 EARTH LUG ZA6001-08 TESA169 SHIELD CLIP ZA6009-12 K4CD01000002 TERMINAL ZB001 TMME227 CLAMPER 11. Schematic Diagram for printing with A4 12. Cover for printing with A4...
  • Page 51 Q2506 C2527 C2532 L2505 UNR521100L R2521 R2522 ELESN330JA C2513 C2514 R2509 R2510 6.3V 100k 100k 0.1u 100u Q2504 L2504 G1C330K00017 R2507 R2508 UNR521100L R2532 C2533 4.7k TX-22LT3 TX-22LT3 A-Board (3 of 3) Schematic Diagram A-Board (3 of 3) Schematic Diagram...
  • Page 52 JS1058 AA_LED_R LED_R TP9021 AA_LCD_FOUT TP9028 FOUT TP9035 AA_LCD_FIN JS1057 AA_REMOTE REMOTE TP9036 AA_LCD_FCLK TP9027 FCLK JS1056 AA_KEY TP9037 AA_LCD_RESET RESET TP9034 TP9038 FACTORY K1KA13A00122 B13B-ZR-SM4-TFT(Z) TX-22LT3 DG-Board (1 of 5) Schematic Diagram TX-22LT3 DG-Board (1 of 5) Schematic Diagram...
  • Page 53 L9018 C/Pb L9019 4.7u 4.7u Q9026 0.1u Q9021 R9092 C9088 2SD10300TL 0.16A C9184 C9193 R9084 C9180 2SB0709A0L C9178 R9126 100u 100u R9093 ON/OFF C9183 R9166 0.1u TX-22LT3 DG-Board (2 of 5) Schematic Diagram TX-22LT3 DG-Board (2 of 5) Schematic Diagram...
  • Page 54 ZA6008 ZA6012 TESA169 TESA169 K4CD01000002 L9025 JS9054 JS9057 JS9060 JS9068 JS9069 JS9072 J0JGC0000021 DG-BOARD TXNDG10HNK (3/5) JS9055 JS9058 JS9061 JS9070 JS9073 JS9056 JS9059 JS9062 JS9071 JS9074 TX-22LT3 DG-Board (3 of 5) Schematic Diagram TX-22LT3 DG-Board (3 of 5) Schematic Diagram...
  • Page 55 R6042 R6044 6.8k R6012 R6186 R6071 R6074 Q6006 C6044 C6051 B1ADCF000003 C6046 C6190 C6192 6.3V 1000p 1000p 1000p 0.01u 3.3u R6027 R6190 R6033 AAJ_PHIN R6195 R6010 TX-22LT3 DG-Board (4 of 5) Schematic Diagram TX-22LT3 DG-Board (4 of 5) Schematic Diagram...
  • Page 56 C6065 6.3V L6901 EHDB C6068 C6901 C6902 Q6900 0.1u 6.3V B1DHDC000021 0.1u 100u TPC6104 C6083 0.1u C6077 R6901 R6067 330k R6903 R6068 Q6901 UNR521100L C6085 AC_PANEL_ON TX-22LT3 TX-22LT3 DG-Board (5 of 5) Schematic Diagram DG-Board (5 of 5) Schematic Diagram...
  • Page 57 TP612 R628 1/2W 1/2W C627 R605 R619 0.1u ZA601 ZA602 ZA603 K9ZZ00000424 K9ZZ00000424 K9ZZ00000424 D601 Q604 R615 MA2J72800L 6.8k UNR211300L C612 Q603 R616 R608 6.8k 2SD0601A0L R622 INVERTER TX-22LT3 TX-22LT3 PD-Board and PH-Board Schematic Diagram PD-Board and PH-Board Schematic Diagram...
  • Page 58 8 Block and Schematic Diagrams 8.1. Schematic Diagram Notes...
  • Page 60 TO DG3 (DG-BOARD) Q608 T602 Q605 PA601 BACK LIGHT Q606 IC602 PWM CONTROL INV_DET FROM IC3002-41 (DG-BOARD) IC601 OP AMP INV_PWM Q601 FROM IC6004-98 (DG-BOARD) Q602 LIGHT ON TO A-BOARD FROM IC1001-97 (DG-BOARD) (OVER Q603,604 VOLTAGE PROTECT) TX-22LT3 Power Block Diagram...
  • Page 61 V_OUT VD_S Q814 Q813 D814 D813 IC807 STB 3.3V +3.3V V_IN V_OUT VD_S STB_3.3V (OVER VOLTAGE PROTECT) From PD-BOARD D815 D816 IC801 +1.5V 1.5V V_IN ON/OFF PIXEL POW Q811,Q812 From IC3002-91 (DG-BOARD) 1.5V D817 D818 STB_2.5V TX-22LT3 Power Block Diagram...
  • Page 62 MAIN POW 32 42 61 69 IC1008 16M FLASH 37 47 STB_3.3V STB 3.3V STB 3.3V IC9007 35 49 IC9003 AVR 3.3V IC9004 1.5V AVR 3.3V 1.5V 1.5V STB 2.5V IC9008 STB_2.5V STB 2.5V AVR 3.3V TX-22LT3 Power Block Diagram...
  • Page 63 2 11 21 53 59 61 68 72 82 85 89 90 92 IC9003 AVR 3.3V IC9004 AVR 3.3V IC9006 5M FIFO DG6900 IC9008 LCD PANEL 13 18 19 22 35 41 49 AVR 3.3V Q6901 Q6900 TX-22LT3 Power Block Diagram...
  • Page 64 S2-2 21PIN SLOW V/Y OUT SCRAT AV2-Q-LINK C/PB OUT Q-LINK Q4001 MONIV VIDEO_OUT VIDEO IN VIDEO_IN V IN JK4001 L IN SDA1 R IN SCL1 Q4102 B-BOARD TV-V Q2102,Q2103 TNR001 VIDEO TUNER SDA1 SDA1 SCL1 SCL1 TX-22LT3 Signal Block Diagram...
  • Page 65 SDA1 EOOFER AMP RESQ RESQ SCL1 WOOFER AMP STB TO DG1 (DG-BOARD) C/PB C/PB GREEN BLUE IC4110 MUTE Q4156 MUTE CONT AV1-Q-LINK RESQ RESQ Q-LINK Q-LINK AV2-Q-LINK CONT Q-LINK_SEL Q-LINK SEL Q4155 SDA1 SDA1 SCL1 SCL1 TX-22LT3 Signal Block Diagram...
  • Page 66 SDA-1 SDA-1 SDA-1 SCL-2 SCL-2 SCL-2 SCL-1,2,3 SDA-1,2,3 SDA-2 SDA-2 SDA-2 IC3002 SCL-A SCL-A LCD-SCL2 RGB-SCL LCD MCU SDA-A SDA-A LCD-SDA2 RGB-SDA SCL0 MUTE SDA0 IC1004 SCL1 QESQ EEPROM SDA1 Q-LINK_SEL SCL2 SCL2 Q-LINK SDA2 SDA2 TX-22LT3 Signal Block Diagram...
  • Page 67 55 54 IC1001 Q6006 OSD R IC1008 16M FLASH Q6004 OSD G Q6005 OSD B Q1004 CVBS1 IC1009 64M SDRAM SCL-0 SDA-0 SCL-1 SDA-1 SCL-2 SDA-2 MUTE MUTE QESQ RESQ Q-LINK_SEL Q-LINK SEL Q-LINK Q1009 Q1005,Q1006 Q-LINK TX-22LT3 Signal Block Diagram...
  • Page 68 R4003 K2HA612B0034 AC_AV3_L L812 TP803 L801 YKC21-3939N EXCELDR35V C4004 R4004 180k D894 TP801 C803 B0HCMM000009 AC_AV3_R C804 R804 0.01u 1.78k 220u C4005 R4005 TP802 180k L802 100u C808 D801 JK801 B0JCME000025 680u K2EE2B000003 TX-22LT3 A-Board (1 of 3) Schematic Diagram...
  • Page 69 6.3V B0JCME000025 1200u 0.01u 0.1u D809 R807 MA2J11100L Q810 UNR521100L 9V(0.26A) D803 MA2J11100L D804 MAZ81100ML TP806 D894 C807 B0HCMM000009 2200p R804 1.78k R805 L802 100u C808 C809 C823 D801 B0JCME000025 680u 0.01u 0.1u TX-22LT3 A-Board (1 of 3) Schematic Diagram...
  • Page 70 L811 TP818 FOUT C839 C838 470u 0.01u C841 C840 0.01u 680u R845 R846 Q811 2SD0601A0L R847 AA_LED_R LED_R Q812 A-BOARD TNPH0546 (2/3) UNR521100L AA_REMOTE REMOTE AA_KEY TO D K1MN50A00005 TX-22LT3 A-Board (2 of 3), B-Board, K-Board, and V-Board Schematic Diagram...
  • Page 71 2.2u TV_V Q4102 TP011 2SB0709A0L R4117 FOUT 3.3k TP012 TP4012 AH_AM TP013 TP014 TP4015 TP015 AA_TRAP/GAME C2102 TP2101 R002 0.1u TP016 R2111 TP4011 LED_R REMOTE TP4101 TO DG1 K1MN50A00005 TX-22LT3 A-Board (2 of 3), B-Board, K-Board, and V-Board Schematic Diagram...
  • Page 72 I2C_CL D_CTR_I/O_1 DACM_L I2C_DA R2505 R2516 4.7k L2506 EXCELDR35V C2526 R2511 Q2506 R2512 C2527 L2505 UNR521100L ELESN330JA C2513 C2514 R2510 R2509 6.3V 0.1u 100u Q2504 L2504 G1C330K00017 R2507 R2508 UNR521100L R2532 C2533 4.7k TX-22LT3 A-Board (3 of 3) Schematic Diagram...
  • Page 73 AB_TV_R R2529 R2530 Q2502 100k 100k UNR521100L AJ_W R2515 C2529 AJ_SP_LCH 2.2u AJ_SP_RCH R2516 C2530 R2517 R2519 5.6k 5.6k 2.2u C2531 AJ_HP_LCH AJ_HP_RCH Q2506 C2532 UNR521100L R2521 R2522 100k 100k R2532 C2533 4.7k TX-22LT3 A-Board (3 of 3) Schematic Diagram...
  • Page 74 TP9003 AA_BUSREQ TP9016 AA_LCD_MD2 TP9018 AA_LCD_MD0 TP9029 JS1058 AA_LED_R LED_R TP9021 AA_LCD_FOUT TP9028 FOUT TP9035 AA_LCD_FIN JS1057 AA_REMOTE REMOTE TP9036 AA_LCD_FCLK TP9027 FCLK JS1056 AA_KEY TP9037 AA_LCD_RESET RESET TP9034 TP9038 FACTORY K1KA13A00122 B13B-ZR-SM4-TFT(Z) TX-22LT3 DG-Board (1 of 5) Schematic Diagram...
  • Page 75 R9028 AA_SDA_A Q9015 R9060 C9225 6.3V B1ABCC000004 AI_PB SDA_A R9043 SCL_A R9054 R9086 R9056 L9016 C9039 G1C100KA0009 Q9017 SDA_0/1/2 6.3V 2SB0709A0L C9033 SCL_0/1/2 R9051 R9058 C9224 6.8k FOUT FCLK RESET FACTORY K1KA13A00122 B13B-ZR-SM4-TFT(Z) TX-22LT3 DG-Board (1 of 5) Schematic Diagram...
  • Page 76 C9074 C9229 AAF_FO4 AAF_FO5 6.3V R9080 R9085 AAF_RE AAF_WE C9109 C9112 AAF_RR AAF_WR RSTR RSTW 100u AAF_FCKR SRCK SWCK C9082 R9090 R9091 R9106 Q9022 R9119 B1ABCC000004 C/Pb Q9021 R9092 C9088 R9084 2SB0709A0L R9093 TX-22LT3 DG-Board (2 of 5) Schematic Diagram...
  • Page 77 MAZ80560ML MAZ80560ML 3.3V C9142 IC9009 AVR 2.5V R9106 C0CBCAD00006 R9131 R9119 PQ1X251M2ZP C9230 L9018 L9019 C/Pb 4.7u 4.7u Q9026 0.1u 2SD10300TL 0.16A C9184 C9193 C9180 C9178 R9126 100u 100u ON/OFF C9183 R9166 0.1u TX-22LT3 DG-Board (2 of 5) Schematic Diagram...
  • Page 78 1000p 1000p 0.1u R1064 EXB38V680JV ZA6009 ZA6001 ZA6005 TESA169 TESA169 K4CD01000002 ZA6010 ZA6002 ZA6006 K4CD01000002 TESA169 TESA169 ZA6003 ZA6007 ZA6011 TESA169 TESA169 K4CD01000002 R1094 ZA6004 ZA6008 ZA6012 TESA169 TESA169 K4CD01000002 DG-BOARD TXNDG10HNK (3/5) TX-22LT3 DG-Board (3 of 5) Schematic Diagram...
  • Page 79 AQ_D9 IC1006 AO_A3 AO_A4 C1049 B38V680JV C1051 C1052 C0JBAB000591 0.1u 0.1u IC1002 INVERTER C0EBE0000191 RESET L9025 JS9054 JS9057 JS9060 JS9068 JS9069 JS9072 J0JGC0000021 JS9055 JS9058 JS9061 JS9070 JS9073 JS9056 JS9059 JS9062 JS9071 JS9074 TX-22LT3 DG-Board (3 of 5) Schematic Diagram...
  • Page 80 0.1u R604 R6017 R6177 R6178 R6185 AC_RGB-SDA R6073 R6038 R6070 AC_RGB-SCL R6039 R6007 Blue R6295 R6037 Q6005 Blue 3.9k B1ADCF000003 R6018 R6294 R6042 6.8k R6012 R6186 R6071 R6074 Q6006 B1ADCF000003 R6027 R6190 R6033 TX-22LT3 DG-Board (4 of 5) Schematic Diagram...
  • Page 81 AAJ_YUV8 R6295 R6037 TST2 VCOI ADRS1 YSOUT6 3.9k (IIC Decorder CLK) C6055 C6037 1000p 0.01u R6294 R6042 R6044 6.8k C6044 C6046 C6051 C6192 C6190 6.3V 1000p 1000p 1000p 0.01u 3.3u AAJ_PHIN R6195 R6010 TX-22LT3 DG-Board (4 of 5) Schematic Diagram...
  • Page 82 AF_PMUTE R6051 PMUTE REOUT4 OSDR2 VDDS AF_PXRST R6054 PREST OSDR3 REOUT3 OSDR4 CPUHD REOUT2 C6063 6.3V AJ_HS R6003 AJ_VS R6008 OSD_V C6065 6.3V EHDB C6068 0.1u C6083 0.1u C6077 R6067 330k R6068 C6085 TX-22LT3 DG-Board (5 of 5) Schematic Diagram...
  • Page 83 DL6924 DL6911 EXB38VR000V J0HABB000008 AD_RE3 J0HABB000008 AD_BE7 TP6901 AD_RE2 AD_RE1 AD_RE0 (LR) TP6902 (UD) SIDE K1MN50B00005 TJSF52250 FH12A-50S-05SH L6900 L6901 C6901 C6902 Q6900 6.3V B1DHDC000021 0.1u 100u TPC6104 R6901 R6903 Q6901 UNR521100L AC_PANEL_ON TX-22LT3 DG-Board (5 of 5) Schematic Diagram...
  • Page 84 TPC8006H 7A(Avg) EXCELSR35T R603 R602 Q606 B1BBFF000001 R637 L603 L607 120u J0JHC0000001 C627 R605 R619 0.1u ZA601 ZA602 ZA603 K9ZZ00000424 K9ZZ00000424 K9ZZ00000424 D601 Q604 R615 MA2J72800L 6.8k UNR211300L Q603 C612 R616 R608 6.8k 2SD0601A0L R622 TX-22LT3 PD-Board and PH-Board Schematic Diagram...
  • Page 85 T602 3.15kV TP610 ETJ23K12AM Q606 C665 TP670 3.15kV B1BBFF000001 C652 D612 3.15kV ZA661 ZA662 R627 MA2J11100L TP611 K9ZZ00000424 K9ZZ00000424 1/2W C664 TP666 3.15kV C653 R634 3.15kV TP612 R628 1/2W 1/2W C627 0.1u 300L INVERTER TX-22LT3 PD-Board and PH-Board Schematic Diagram...
  • Page 86 ORDER NO. ITD0310055C2 LCD TV TX-22LT3 LH12 Chassis Power Source Aerial-Rear AC 100~240V, 50/60Hz Power Consumption Operating Conditions Average use: 67W Temperature: 41°F-95°F(5-35°C) Stand-by condition: 1.8W Humidity: 5%-90% RH (non-condensing) TV set DC 15V, 3.8 A max. Connection Terminals AV1 (Scart connecter)

  • Page 87: Table Of Contents

    TX-22LT3 CONTENTS Page Page 1 Safety Precautions 6.3. Option Description 1.1. General Guidelines 7 Conductor Views 1.2. Touch-Current Check 7.1. A-Board 2 Prevention of Electro Static Discharge (ESD) to 7.2. DG-Board Electrostatically Sensitive (ES) Devices 7.3. PD-Board 3 Self Check 7.4.

  • Page 88: Safety Precautions

    TX-22LT3 1 Safety Precautions 1.1. General Guidelines 1. 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. 2. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly installed.

  • Page 89: Prevention Of Electro Static Discharge (Esd) To

    TX-22LT3 2 Prevention of Electro Static 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 90: Self Check

    TX-22LT3 3 Self Check 1. Self-Check is used to automatically check the bus lines and hexadecimal code of the TV set. 2. To get into the Self -Check mode press the Down ( ) button on the customer controls at the front of the set, at the same time pressing the Recall button on the remote control, and the screen will show : If the CCU ports have been checked and found to be incorrect or not located then “--”...

  • Page 91: Chasis Board Layout

    TX-22LT3 4 Chasis Board Layout Board Name Function A-Board Main (DC Power Supply, Audio, Input Select, AV Connector) B - Board Tuner DG - Board Global Core, RGB Processor, Micro Processor, Pixel Converter) K - Board Switch PD - Board...

  • Page 92: Servicing Method

    TX-22LT3 5 Servicing method 5.1. Removing the tilt base 1. Lay down the main unit so that the rear cover faces upward. 2. Remove the AV cable cover. 3. Remove the tuner cable cover. 5.2. Removing the rear cover 1. Remove the tilt base. (See 5.1.) 2.

  • Page 93: Removing The Ph Shield Plate And The Pd Shield Plate

    TX-22LT3 5.4. Removing the PH shield plate 5.6. Removing the V-Board and the PD shield plate 1. Remove the speaker box. (See 5.5.) 2. Disconnect the coupler (A5). 1. Remove the shield plate. (See 5.3.) 3. Remove the fixing screw (1pcs).

  • Page 94: Removing The Chassis

    TX-22LT3 5.9. Removing the chassis 5.10. Removing the tuner cover and the terminal cover 1. Remove the PH shield plate and the PD shield plate. (See 5.4.) 1. Remove the rear cover. (See 5.2.) 2. Remove the V-Board. (See 5.6.) 2.

  • Page 95: Removing The A-Board

    TX-22LT3 5.12. Removing the A-Board 5.14. Removing the DG-Board 1. Remove the shield plate. (See 5.3.) 1. Remove the shield plate. (See 5.3.) 2. Remove the angle. (See 5.5.) 2. Disconnect the couplers (DG1, DG2, DG3 and DG6900). 3. Remove the terminal cover. (See 5.10.) *When removing coupler (DG6900), cautions are required for the handling of a connector.

  • Page 96: Removing The Pd-Board

    TX-22LT3 5.16. Removing the PD-Board 1. Remove the rear cover. (See 5.2.) 2. Remove the PD shield plate. (See 5.4.) 3. Disconnect the couplers (PD1, PD2, PD3 and PD5). 4. Remove the fixing screw (1pcs). 5. Remove the PD-Board. 5.17. Removing the LCD panel 1.

  • Page 97: Service Mode Function

    TX-22LT3 6 Service Mode Function MPU controls the functions switching for each IICs through IIC bus in this chassis. The following setting and adjustment can be adjusted by remote control in Service Mode. 6.1. How to enter SERVICE 1 1. In sound menu, set BASS to MAXIMUM, and set TREBLE to MINIMUM.
  • Page 98 TX-22LT3...

  • Page 99: Option Description

    TX-22LT3 6.3. Option Description...
  • Page 100 TX-22LT3...
  • Page 101 TX-22LT3...

  • Page 102: Conductor Views

    1.5V D817 D818 Q606 IC602 PWM CONTROL STB_2.5V INV_DET FROM IC3002-41 (DG-BOARD) IC601 OP AMP INV_PWM Q601 FROM IC6004-98 (DG-BOARD) Q602 LIGHT ON TO A-BOARD FROM IC1001-97 (DG-BOARD) (OVER Q603,604 VOLTAGE PROTECT) TX-22LT3 TX-22LT3 Power Block Diagram Power Block Diagram...
  • Page 103 IC9003 AVR 3.3V IC9004 1.5V AVR 3.3V 1.5V 1.5V IC9006 5M FIFO DG6900 STB 2.5V IC9008 LCD PANEL 13 18 19 22 35 41 49 STB_2.5V STB 2.5V AVR 3.3V Q6901 Q6900 TX-22LT3 Power Block Diagram TX-22LT3 Power Block Diagram...

  • Page 104: Dg-Board

    V IN JK4001 L IN Q-LINK SDA1 Q-LINK R IN AV2-Q-LINK CONT SCL1 Q-LINK_SEL Q-LINK SEL Q4155 Q4102 SDA1 SDA1 SCL1 SCL1 B-BOARD TV-V Q2102,Q2103 TNR001 VIDEO TUNER SDA1 SDA1 SCL1 SCL1 TX-22LT3 Signal Block Diagram TX-22LT3 Signal Block Diagram...
  • Page 105 IC3002 SCL-A SCL-A LCD-SCL2 RGB-SCL LCD MCU SDA-A SDA-A LCD-SDA2 RGB-SDA SCL0 MUTE SDA0 IC1004 MUTE SCL1 QESQ EEPROM RESQ SDA1 Q-LINK_SEL SCL2 Q-LINK SEL SCL2 Q-LINK Q1005,Q1006 SDA2 Q1009 Q-LINK SDA2 TX-22LT3 Signal Block Diagram TX-22LT3 Signal Block Diagram...
  • Page 106 Q4150 JS4006 TP4101 Q2101 R2012 R4152 Q2006 Q4151 TP4102 R2019 R2022 Q2102 JS2003 C4039 C4176 TP4104 Q2103 R4126 R4110 JK4002 JS2012 D4004 D4003 JK4001 TP4105 Q2104 C4103 C4102 TP4107 Q2200 R4104 JK4000 JK4003 L4153 TX-22LT3 TX-22LT3 A-BOARD TNPH0546 A-BOARD TNPH0546...
  • Page 107 C4022 TP803 C2519 L2502 TP804 IC2001 TP806 TP810 TP811 TP814 TP815 C2015 TP818 TNPH0546 TP850 SEE REVERSE FOR ORDERNO. TP871 TP872 TP4016 TP4017 TP4203 C4176 TP4203 TP4017 C4004 JK4002 JK4003 JK4000 JK4004 C4002 JK4001 TX-22LT3 TX-22LT3 A-BOARD TNPH0546 A-BOARD TNPH0546...

  • Page 108: B, H1, H2, K, P1 And P2-Board

    Q9019 R9126 Q9003 C9170 X3001 R3016 R9302 C9220 R3045 R9094 C9132 C9299 C9040 R9119 Q9004 C9227 R3015 Q9005 R9081 C9007 D9007 C9222 D9006 C9123 C9166 Q9006 C9304 C9301 C9307 R9308 ZA6001 Q9014 ZA6002 ZA6009 TX-22LT3 TX-22LT3 DG-BOARD TXNDG10HNK DG-BOARD TXNDG10HNK...
  • Page 109 R3042 C9063 C9167 C9004 C9199 C9168 TP9084 R3044 Q9020 C3048 TP9014 IC3003 C3009 TP9019 TP9017 TP9084 Q9027 TP9085 TP9037 TP9015 Q9028 TP9083 TP9016 Q9030 TP9034 TP9017 TP9038 TP9012 Q9032 TP9006 TP9020 TP9036 TP9007 TP9008 TX-22LT3 TX-22LT3 DG-BOARD TXNDG10HNK DG-BOARD TXNDG10HNK...

  • Page 110: Pd-Board

    Q608 D608 T602 T601 C651 CONNECT PROPERLY C615 Q605 C656 TP620 TP621 R625 R630 D605 C652 R618 C655 R631 C653 R628 C614 C654 R627 R623 D606 CONNECT PROPERLY D609 D610 CAUTION D611 HIGH VOLTAGE TX-22LT3 TX-22LT3 PD-BOARD TNPA2896 PD-BOARD TNPA2896...

  • Page 111: Ph-Board

    TNPA2897 TNPA2897 SEE REVERSE FOR ORDERNO. CAUTION HIGH VOLTAGE PH-BOARD (COMPONENT SIDE) TNPA2897 R660 C663 D661 CAUTION TNPA2897 HIGH C665 ORDER NO. VOLTAGE C660 C664 CAUTION C661 HIGH VOLTAGE D660 C662 R661 CONNECT PROPERLY TX-22LT3 TX-22LT3 PH-BOARD TNPA2897 PH-BOARD TNPA2897...
  • Page 112 B-BOARD (COMPONENT SIDE) TNPA2895 VIDEO RFAGC TNR001 K-BOARD (COMPONENT SIDE) TNPA2894 SW801 ORDER NO. EARC5 94V-0 TNPA2894 K 1 -/DOWN +/UP TV/AV SW105 SW104 SW103 SW102 SW101 TX-22LT3 TX-22LT3 V-BOARD TNPA2956 V-BOARD TNPA2956 B-BOARD TNPA2895 B-BOARD TNPA2895 K-BOARD TNPA2894 K-BOARD TNPA2894...

  • Page 113: Signal Block Diagram

    TNR001 TNPA2895 C003 SEE REVERSE FOR ORDERNO. C009 K-BOARD (FOIL SIDE) TNPA2894 SEE REVERSE FOR ORDERNO. TNPA2894 K 1 SW101 SW102 SW103 SW104 SW105 +/UP -/DOWN TX-22LT3 TX-22LT3 V-BOARD TNPA2956 V-BOARD TNPA2956 B-BOARD TNPA2895 B-BOARD TNPA2895 K-BOARD TNPA2894 K-BOARD TNPA2894...

  • Page 114: A-Board (1 Of 3) Schematic Diagram

    C803 B0HCMM000009 2200p AC_AV3_R C804 R804 0.01u 1.78k C4005 220u R4005 TP802 180k R805 L802 100u D801 C808 C809 C823 JK801 B0JCME000025 680u 0.01u 0.1u K2EE2B000003 TX-22LT3 TX-22LT3 A-Board (1 of 3) Schematic Diagram A-Board (1 of 3) Schematic Diagram...
  • Page 115 2SD0601A0L R2111 R847 AA_LED_R TP4011 LED_R Q812 A-BOARD TNPH0546 (2/3) UNR521100L AA_REMOTE REMOTE AA_KEY TP4101 TO DG1 K1MN50A00005 TX-22LT3 TX-22LT3 A-Board (2 of 3), B-Board, K-Board, and V-Board Schematic Diagram A-Board (2 of 3), B-Board, K-Board, and V-Board Schematic Diagram...

Table of Contents