Panasonic TX-23LX50M Service Manual Download Page 17 | Manualshive

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9 Adjustment

9.1. DVCO adjustment

17

TX-23LX50M / TX-23LX50A / TX-23LX50X

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Summary of Contents for TX-23LX50M

Page 1: ...urce AC 110 240 V 50 60 Hz Power Consumption Average use 87 W Standby condition 0 5 W LCD 22 9 inch 58 3 cm Wide XGA 1366 768 pixels 16 9 aspect ratio LCD panel Screen Size 508 mm W 286 mm H 20 0 11 3 Sound Speaker Ø6 cm 2 pcs 8 W Audio Output 6 W 3 W 3 W 10 THD Headphones M3 3 5 mm Jack 1 Receiving Systems Band name Receiving Channels Regular TV ORDER NO ITD0505026CE ...

Page 2: ...R Z1 Z37 CHINA 5A 9A AUST Aerial Rear UHF VHF Operating Conditions Temperature 5 C 40 C Humidity 5 90 RH non condensing Connection Terminals AV1 VIDEO RCA Pin Type 1 0 Vp p 75 W S VIDEO MINI DIN 4 pin Y 1 0 Vp p 75 W C 0 286 Vp p 75 W AUDIO L R RCA Pin Type 2 0 5 Vrms AV2 VIDEO RCA Pin Type 1 0 Vp p 75 W AUDIO L R RCA Pin Type 2 0 5 Vrms Y 1 0 Vp p including synchronization PB PR 0 35 Vp p Applica...

Page 3: ...hematic Diagram 23 11 1 Schematic Diagram Notes 23 11 2 Main Block Diagram 24 11 3 Power Block Diagram 25 11 4 Signal Block Diagram 26 11 5 A Board 1 of 3 Schematic Diagram 27 11 6 A Board 2 of 3 Schematic Diagram 28 11 7 A Board 3 of 3 Schematic Diagram 29 11 8 AP K and V Board Schematic Diagram 30 12 Parts Location Mechanical Replacement Parts List 31 12 1 Parts Location 31 12 2 Packing Exploded...

Page 4: ...servicing make the following leakage current checks to prevent the customer from being exposed to shock hazards 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 integrat...

Page 5: ...solder as well although Pb solder may be used PCBs manufactured using lead free solder will have the PbF within a leaf Symbol stamped on the back of PCB Caution Pb free solder has a higher melting point than standard solder Typically the melting point is 50 70 F 30 40 C higher Please use a high temperature soldering iron and set it to 700 20 F 370 10 C Pb free solder will tend to splash when heate...

Page 6: ...annels channels caption data and some other user defined settings will be erased and return to factory setting 4 1 How to access 4 1 1 Access Produce TV reception screen and while pressing VOLUME button on the main unit press OFF TIMER button on the remote controller unit simultaneously 4 1 2 Exit When one of the buttons for channel selection etc is pressed the display returns to the normal screen...

Page 7: ...tch Tuner Audio Video Processor MCU LCD Driver LVDS V Board Remote Receiver LED Speaker Out K Board Power Switch Key Scan AP Board Power Supply Power Regulator Power Unit Power AC DC None serviceable Power Unit should be exchanged for service 7 TX 23LX50M TX 23LX50A TX 23LX50X ...

Page 8: ...g screws 4pcs 5 Remove the pedestal ass y 6 2 Rear cover 1 Remove the fixing screws 15pcs and 2pcs 2 Remove the rear cover 6 3 Tuner cover and the Shield cover 1 Remove the AC cord 2 Remove the fixing screws 2pcs 3 Remove the tuner cover 4 Remove the fixing screws 5pcs 5 Remove the Shield cover 6 Disassembly for Service 8 TX 23LX50M TX 23LX50A TX 23LX50X ...

Page 9: ... Disconnect the bridge connector A3 and A4 4 Remove the A Board and the shield case 6 6 AP Board 1 Disconnect the couplers AP1 AP2 and AP5 2 Disconnect the bridge connector A3 and A4 on A Board 3 Remove the AP Board 6 7 K Board 1 Remove the fixing screws 2pcs and 2pcs 2 Remove the K Board unit 3 Disconnect the couplers K1 K2 and K3 4 Remove the K Board 9 TX 23LX50M TX 23LX50A TX 23LX50X ...

Page 10: ...n chassis 1 Remove the fixing screw 1pcs 2 Disconnect the earth cable 3 Remove the fixing screws 6pcs 4 Disconnect the couplers A2 A5 AP2 AP5 CN101 and K1 5 Remove the main chassis 6 11 LCD Panel 1 Remove the main chassis 2 Remove the K Board 3 Remove the fixing screws 2pcs 5pcs and 1pcs 4 Remove two LCD mount metal 5 Remove the LCD Panel 10 TX 23LX50M TX 23LX50A TX 23LX50X ...

Page 11: ...7 Lead of Wiring 11 TX 23LX50M TX 23LX50A TX 23LX50X ...

Page 12: ...ow to enter SERVICE 1 1 In sound menu set BASS to MAXIMUM and set TREBLE to MINIMUM 2 Simultaneously press INDEX button on remote control and DOWN button on the TV set 8 2 How to enter SERVICE 2 1 Set the channel to CH99 2 Select the Sub Brightness under Service 1 3 Press HOLD button on remote control Note To exit to Service mode press N button on remote control 12 TX 23LX50M TX 23LX50A TX 23LX50X...

Page 13: ...13 TX 23LX50M TX 23LX50A TX 23LX50X ...

Page 14: ...8 3 Option Description 14 TX 23LX50M TX 23LX50A TX 23LX50X ...

Page 15: ...15 TX 23LX50M TX 23LX50A TX 23LX50X ...

Page 16: ... A Board is replaced option code should be re memorized Spare part of IC1103 is already memorized all Data for TX 23LX50M If you use for other model you should re memorized the different option code in SERVICE 2 mode 16 TX 23LX50M TX 23LX50A TX 23LX50X ...

Page 17: ...9 Adjustment 9 1 DVCO adjustment 17 TX 23LX50M TX 23LX50A TX 23LX50X ...

Page 18: ...18 TX 23LX50M TX 23LX50A TX 23LX50X ...

Page 19: ... C867 C868 C869 C870 C872 C873 C877 C878 JS1508 JS1509 JS1700 JS1701 JS1510 C892 C893 X1100 C894 R103 R104 R105 R106 R107 R108 C1213 C1214 C1215 C1216 C1217 C1218 C1219 C1221 C1222 C1224 C1225 C1226 C1227 R1208 R1209 C1234 C100 C101 C102 C103 C104 C105 C1241 C1242 C1243 C108 C109 D1221 D1222 D1223 D1224 R1221 R1224 R1225 R1226 R1227 R1228 R1229 R1235 R1236 C2202 R1817 C2203 R1818 C2204 Q2201 Q2202...

Page 20: ...77 R1778 R1779 C3107 R1781 R1782 R1783 R2531 R2532 C866 R1787 C871 C874 C875 R1795 C876 R1796 R1797 C877 C878 R1798 C879 R1799 C880 C881 JS1702 C882 JS1703 C883 JS1704 C884 JS1705 C885 C886 C887 C888 C889 C890 C891 X1100 D836 D837 D838 Q1012 X1500 D851 D852 D853 D854 C1220 D855 D856 D857 C1223 D858 D859 Q1223 C1228 C1229 C1230 C1231 C1232 C1233 C1235 C1236 C1237 R1210 C1238 C1239 C100 IC851 R1215 ...

Page 21: ...5 2 1 3 4 5 2 1 2 22 23 1 2 22 23 1 2 13 14 1 2 19 20 1 3 R801 R802 R803 R804 R805 R806 R807 R808 R809 R810 R811 R812 C801 C802 C803 C804 C805 C806 C807 C808 C809 C810 C811 C812 C813 C814 C815 C816 C817 C818 ZA801 D801 D802 D803 D804 D805 D806 D807 IC801 IC802 IC803 L801 L802 L803 L805 L806 L807 L808 AP3 AP4 AP5 TNPA3627 2 AP L804 AP1 AP2 PbF SEE REVERSE FOR ORDER NO 1 5 2 4 3 1 5 2 4 3 1 5 2 4 3 ...

Page 22: ...PA3609 K 2 COLD HOT LIVE CIRCUIT T4AE250V K3 PbF SEE REVERSE FOR ORDER NO 1 4 1 3 1 3 F890 SW890 R890 SW301 SW302 SW303 SW304 SW305 K1 K2 ZA890 STR TNPA3609 HOT COLD TV AV FUNCTION 2 K LIVE CIRCUIT T4AE250V K3 ORDER NO 1 4 1 3 1 3 C203 C216 SN201 D201 V1 V2 RM201 JK201 TNPA3610 2 V ORDER NO 1 2 15 16 1 4 R210 R211 C202 C203 C204 C205 C206 C207 C208 C209 C211 C212 C213 C214 C215 C216 SN201 D201 D20...

Page 23: ...11 Block and Schematic Diagram 11 1 Schematic Diagram Notes TX 23LX50M TX 23LX50A TX 23LX50X 23 ...

Page 24: ...AIN 1 8V STB 5V HEADPHONES AMP AUDIO IC2501 IC2251 A Tuner TU100 P LCD Panel IC1700 LCD DRIVER EEPROM IC1101 IC1100 MCU SDRAM IC1102 PROM IC1103 V AV1 AV2 MONITOR MULTI PROCESSOR SOUND S VIDEO L R V L R V Y PB PR JK001 IC1500 SIGNAL PROCESSOR VIDEO IC1106 LEVEL CHANGE 5 0V IIC BUS IC1701 TRANS LVDS MITTER P S AP SP LEFT SP RIGHT BATS LED REMOTE CONTROL AC IN K KEY CONTROL 3 3V TX 23LX50A M X Main ...

Page 25: ... 0V RM201 TX 23LX50A M X Power Block Diagram TX 23LX50A M X Power Block Diagram 5 AVSUP VDDDI 96 LCD DRIVER VDDPAD1 IC1700 3 VDDDACU 12 RC_IN A BOARD 32 13 STB2 5V_A 20 57 V1 VCC KEY SCAN 56 13 VDDA2 5 22 STB3 3V_D VDDPAD9 3 3DIG VDDA2 5 15 VDD2 5 65 66 6 44 34 VDD2 5 PROM 73 IC1500 4 50 VDDARGB Q1223 31 7 13 4 VDDAFBL 32 VCC 44 RESET RS VDDD2 LVDS TRANSMITTER IC1103 2 AHVSUP IC1104 1 8V_D LEVEL C...

Page 26: ...INV_ON 45 SMUTE 16 WP 6 16 B5 B7 18 IC1106 LEVEL CHANGE 8 A5 A7 1 2 2 2 5 0V 3 3V Q1105 Q1223 SDA2 3 3V SCL2 3 3V SDA1 EEP SCL1 EEP A BOARD SC3_IN_R ANA_IN RESETQ SCL2 5 0V SDA2 5 0V IC1102 SDRAM IC1103 80 PCK1 X1500 JK001 AV1S AV1 MONITOR OUT RST3 3 C Y R_SW 5 0V 3 3V COMPONENT AV2 Q2257 Q2256 Q2255 9 VOL Q2003 Q2001 Q2502 Q2501 MUTE 78 77 D_CTR_I O_1 D_CTR_I O_0 SCL2 5 0V SDA2 5 0V Q1515 AFC Q10...

Page 27: ...1 50V 0 01u R1501 82 C1503 6 3V 1u C1520 16V 0 1u 1 8V_A C1507 50V 12p Q1501 2SC584500L R1728 2 61k R1511 1 5k R1723 0 3 3V_A R1246 100 TU100 ENG39A02GF NC 1 NC 2 BM 3 NC 4 SW1 5 SW2 6 BT 7 RF_AGC 8 NC 9 SCL 10 SDA 11 AFT 12 AUDIO_OUT 13 SIF_OUT 14 BTL 15 IF_OUT 16 VIDEO_OUT 17 R1515 220 C1709 50V 0 1u R1740 0 R1221 75 C1555 16V 0 1u C105 0 1u 16V C1529 6 3V 1u C1536 6 3V 1u R1779 10k C1523 4V 100...

Page 28: ...8 TD2 9 VCC 10 TD3 11 TB2 12 TB3 13 GND 14 TB4 15 TB5 16 TD4 17 R F 18 TD5 19 TB6 20 TC0 21 GND 22 TC1 23 TC2 24 TC3 25 TD6 26 VCC 27 TC4 28 TC5 29 GND 30 TC6 31 CLK_IN 32 PDWN 33 PLL_GND 34 PLL_VCC 35 PLL_GND 36 LVDS_GND 37 TD 38 TD 39 TCLK 40 TCLK 41 TC 42 TC 43 LVDS_GND 44 LVDS_VCC 45 TB 46 TB 47 TA 48 TA 49 LVDS_GND 50 TD0 51 TA0 52 TA1 53 GND 54 TA2 55 TA3 56 TA4 C1747 16V 0 01u R1758 0 C1716...

Page 29: ...3V_D C888 50V 0 01u R1210 100 INV_24V C1213 16V 0 1u TP879 R1135 68 R1121 100 SBY5 0V TP878 SBY2 5V_D IC854 C0CBCBD00008 1 Vcont 2 GND 3 Np 5 Vin 4 Vout R1127 100 R1108 0 C1103 50V 0 01u D1109 MAZ80620ML R857 0 SBY3 3V_D TP882 SBY5 0V SBY5 0V C1102 16V 0 1u TP2288 ZA4016 TESA169 R1188 3 3k R1193 100 TP874 IC851 C0CBCBD00008 1 Vcont 2 GND 3 Np 5 Vin 4 Vout R854 4 7k TP872 C1176 16V 0 1u SBY2 5V_D D...

Page 30: ...A0000770 TP209 V1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 V2 1 2 3 4 TP211 TP210 C216 10V 22u TP207 R203 5 6k TP205 TP206 D205 MAZ81400ML R210 27k TP204 C203 6 3V 47u TP208 R205 47 R204 47k TP202 D204 MAZ81400ML TP203 RM201 PNA4701M05TV VOUT GND VCC IC803 C0DAAZG00006 1 V IN 2 SW out 3 GND 4 VO S 5 ON OFF C815 470u 6 3V L808 220u R810 820 C816 6 3V 330u D805 B0JCME000037 L807 22u R809 150 TP816 BAT...

Page 31: ...12 Parts Location Mechanical Replacement Parts List 12 1 Parts Location 31 TX 23LX50M TX 23LX50A TX 23LX50X ...

Page 32: ...12 2 Packing Exploded Views 32 TX 23LX50M TX 23LX50A TX 23LX50X ...

Page 33: ... CARTON 1 14 TPD2AA02801A CUSHION TOP 1 15 TPD2AA02901A CUSHION BOTTOM 1 16 TPEH211 PROTECT COVER 1 17 TQBC2012 INSTRUCTION BOOK ENGLISH 1 TX 23LX50A 17 TQBC2013 INSTRUCTION BOOK ARABIC 1 TX 23LX50X 17 TQBC2014 INSTRUCTION BOOK CHINESE 1 TX 23LX50M 17 TQBC2015 INSTRUCTION BOOK ENGLISH 1 TX 23LX50M X 18 TTP0A0038 TUNER COVER ASSY 1 19 TTPA0409 BUTTON PANEL ASS Y 1 20 TTUA1129 REAR COVER 1 TX 23LX50...

Page 34: ...13 Electrical Replacement Parts List 13 1 Replacement Parts List Notes 34 TX 23LX50M TX 23LX50A TX 23LX50X ...

Page 35: ...1 C1173 ECJ1VB1H103K C 0 001UF K 50V 1 C1175 ECJ1XB1C104K C 0 1UF Z 16V 1 C1176 ECJ1XF1C104Z C 0 1UF Z 16V 1 C1193 EEEHB0G221P C 220PF J 4V 1 C1213 ECJ1XF1C104Z C 0 1UF Z 16V 1 Ref No Part No Part Name Description Pcs Remarks C1214 16 ECJ1XB1C104K C 0 1UF Z 16V 3 C1217 20 ECJ1XF1C104Z C 0 1UF Z 16V 4 C1221 2 2 ECJ1XB1C104K C 0 1UF Z 16V 2 C1223 ECJ1XC1H561J C 560PF J 50V 1 C1224 2 5 ECJ1XB1C104K C...

Page 36: ...DE 1 F890 K5D402BKA001 AC FUSE 1 F890 1 2 K3GE1ZA00010 FUSE HOLDER 2 Ref No Part No Part Name Description Pcs Remarks FL1704 F1J1A1050020 C 1UF Z 50V 1 FL1705 07 J0JBD0000043 CHIP INDUCTOR 3 IC801 C0DAAZG00006 IC 1 IC802 C0DAAZH00020 IC 1 IC803 C0DAAZG00006 IC 1 IC851 C0CBCBD00008 IC 1 IC852 AN77L08M IC 1 IC853 C0CBCAD00012 IC 1 IC854 C0CBCBD00008 IC 1 IC1100 C2BBYC000011 IC 1 IC1101 C3EBHC000035 ...

Page 37: ... ERJ3GEYJ103 M 10KOHM J 1 16W 1 Ref No Part No Part Name Description Pcs Remarks R1121 ERJ3GEYJ101 M 100 OHM J 1 16W 1 R1122 ERJ3GEYJ333 M 33KOHM J 1 16W 1 R1123 ERJ3GEYJ101 M 100 OHM J 1 16W 1 R1124 ERJ3GEYJ102 M 1KOHM J 1 16W 1 R1125 ERJ3GEYJ101 M 100 OHM J 1 16W 1 R1126 ERJ3GEYJ103 M 10KOHM J 1 16W 1 R1127 ERJ3GEYJ101 M 100 OHM J 1 16W 1 R1128 2 9 ERJ3GEYJ103 M 10KOHM J 1 16W 2 R1130 34 ERJ3GEY...

Page 38: ...YJ331 M 330 OHM J 1 16W 1 R1748 ERJ3GEYJ103 M 10KOHM J 1 16W 1 R1753 ERJ3GEY0R00 M 0 OHM 1 16W 1 R1755 ERJ3GEYJ102 M 1KOHM J 1 16W 1 R1756 ERJ3GEYJ333 M 33KOHM J 1 16W 1 R1757 ERJ3GEYJ563 M 56KOHM J 1 16W 1 R1758 ERJ3GEY0R00 M 0 OHM 1 16W 1 R1760 ERJ3EKF3001 M 3KOHM 1 16W 1 R1763 ERJ3GEY0R00 M 0 OHM 1 16W 1 R1771 ERJ3GEYJ102 M 1KOHM J 1 16W 1 Ref No Part No Part Name Description Pcs Remarks R1772 ...

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