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SERVICE MANUAL

This Service Manual is for the LT8-M40BB (A03P3PH) model.
For the LT8-M40BB (A03P3PH) model, the letter (A03P3PH) is printed on
the Serial Number Label on the back of the unit. Refer to the Serial
Number Label below.

Serial No. Label

"A03P3PH"

″

COLOR LCD TELEVISION

LT8-M40BB

Содержание LT8-M40BB

Страница 1: ...r the LT8 M40BB A03P3PH model For the LT8 M40BB A03P3PH model the letter A03P3PH is printed on the Serial Number Label on the back of the unit Refer to the Serial Number Label below Serial No Label A0...

Страница 2: ...e LCD Television 6 1 Firmware Renewal Mode 7 1 Troubleshooting 8 1 Block Diagrams 9 1 Schematic Diagrams CBA and Test Points 10 1 Waveforms 11 1 Wiring Diagram 12 1 Exploded View 13 1 Mechanical Parts...

Страница 3: ...ription Condition Unit Nominal Limit 1 RECEIVED FREQ RANGE 60dBm 45ch 1 2 kHz kHz 1000 900 500 167 2 INPUT DYNAMIC RANGE mix max c 1 VHF HIGH 8ch UHF 45ch dBuV dBuV 25 101 25 101 28 98 29 98 d 2 VHF H...

Страница 4: ...tly below these specifications Limit specifications represent the absolute worst condition that still might be considered acceptable In no case should a unit fail to meet limit specifications Descript...

Страница 5: ...terminal screw and if applicable to the coaxial connector If the measured resistance is less than 1 0 megohm or greater than 5 2 megohm an abnormality exists that must be corrected before the instrum...

Страница 6: ...near thermally hot parts be sure that leads and components do not touch thermally hot parts c the AC supply d high voltage and e antenna wiring Always inspect in all areas for pinched out of place or...

Страница 7: ...PVC tubing 3 Spacers 4 Insulators for transistors E When replacing AC primary side components transformers power cord etc wrap ends of wires securely about the terminals before soldering F Observe tha...

Страница 8: ...and externally exposed accessible parts RF terminals an tenna terminals video and audio input and output ter minals microphone jacks earphone jacks etc Measuring Method Power ON Insert load Z between...

Страница 9: ...the flat pack IC is fixed with glue to the CBA when removing entire flat pack IC first apply soldering iron to center of the flat pack IC and heat up Then remove glue will be melted Fig S 1 6 4 Relea...

Страница 10: ...ins of the flat pack IC you can remove it easily Fig S 1 3 2 Affix the wire to a workbench or solid mounting point as shown in Fig S 1 5 3 While heating the pins using a fine tip soldering iron or hot...

Страница 11: ...occur due to a potential difference caused by electrostatic charge during unpacking or repair work 1 Ground for Human Body Be sure to wear a grounding band 1 M that is properly grounded to remove any...

Страница 12: ...Jack Holder HP 10 Jack CBA 16 Digital Main CBA Unit 13 Power Supply CBA 21 LCD Module Assembly 22 Front Cabinet 1 Stand Cover Assembly 8 Function CBA 7 IR Sensor CBA 20 Wall Mount Bracket L R 5 Speak...

Страница 13: ...ing procedure of part location 4 Identification of parts to be removed unhooked unlocked released unplugged unclamped or desoldered N Nut L Locking Tab S Screw H Hex Screw CN Connector e g 2 S 2 two S...

Страница 14: ...4 3 A03P3DC 7 IR Sensor CBA 8 Function CBA 5 Speaker Holder 6 Speaker 6 Speaker S 11 S 10 Function Knob S 10 Knob Frame Fig D2 S 12 S 13 S 14 9 Jack Holder HP 10 Jack CBA 11 Inverter Power CBA Fig D3...

Страница 15: ...4 4 A03P3DC 12 Tuner Shield 14 Jack Holder 17 PCB Holder 13 Power Supply CBA 16 Digital Main CBA Unit H 1 S 18 S 18 S 20 S 20 S 20 S 17 S 18 S 18 S 19 S 15 S 15 15 Shield Box S 16 S 16 S 16 Fig D4...

Страница 16: ...5 A03P3DC S 21 S 22 S 22 S 23 S 23 S 24 S 26 S 25 S 25 S 25 S 24 S 26 21 LCD Module Assembly 22 Front Cabinet 18 AC Inlet Holder 20 Wall Mount Bracket R 19 Stand Bracket 20 Wall Mount Bracket L Fig D...

Страница 17: ...LCD Module Assembly CN453 CN452 CN610 CN600 CN101 CN801 CN601 CL202B CN802 CL201A CN401 CN403 CN404 CN402 CN3903 CN3701 CN3711 CN3702 CN3703 CN3704 CL102B CL103A CL103B CN1852 CN1851 CN1801 CN1810 Pow...

Страница 18: ...d remote control unit as shown in Fig 1 How to set up the service mode Service mode 1 Use the service remote control unit 2 Turn the power on 3 Press the service button on the service remote control u...

Страница 19: ...screen Upon completion OK appears on the screen 5 To cancel or to exit from the Auto Calibration Component press BACK button 3 Auto Calibration PC Purpose To bring the color adjustment of PC into stan...

Страница 20: ...e Press button on the service remote control unit and select C D mode 5 CUTOFF Press 3 button to select COB for Blue Cutoff adjustment Press 1 button to select COR for Red Cutoff adjustment DRIVE Pres...

Страница 21: ...ce button on the service remote control unit Refer to page 5 1 To cancel the service mode Press button on the remote control unit 3 Press button on the service remote control unit to initialize the LC...

Страница 22: ...by 3 Check STAND BY indicator Red LED lighting 4 Insert USB storage device with upgrade pkg file to TV set 5 Press button to turn on 6 After approximately 70 seconds the following will appear on the s...

Страница 23: ...ircuit of the secondary circuit and service it if defective Check the presence that the primary component is leaking or shorted and service it if defective Check the presence that the rectifying diode...

Страница 24: ...LOW CHART NO 6 Yes No Is approximately 6V voltage supplied to the collector of Q521 Check D525 D527 D528 C516 and their periphery circuit and service it if defective Check D525 C516 and their peripher...

Страница 25: ...periphery circuit and service it if defective Check D539 C522 and their periphery circuit and service it if defective Check Q508 Q520 D541 D542 P ON H2 line and their periphery circuit and service it...

Страница 26: ...GB input Are the video signals outputted to the specific terminal Check the luminance signal line and service it if defective Check the chrominance signal line and service it if defective Check the RG...

Страница 27: ...tputted normally Audio input terminals FLOW CHART NO 17 Check the line between Pin 16 18 of CN403 and Pin 4 5 of TU1 and TU1 Tuner Unit and service it if defective Are the DIF signals outputted to Pin...

Страница 28: ...2 REMOTE AD11 P ON H1 PROTECT1 P ON H2 P ON H1 AC11 CN453 CN101 CN403 Q181 CN3703 D16 BACKLIGHT ADJ IC3101 MEMORY SCL SDA AE4 AF3 6 5 IC3802 AUDIO SELECTOR SCL SDA 27 28 F25 TUNER CLK TUNER DATA CN403...

Страница 29: ...DEO Y IN 8 8 COM VIDEO Pb IN 6 6 COM VIDEO Pr IN 4 4 VIDEO OUT 15 BUFFER Q011 TU CVBS 29 29 SCART OUT SEL 6 6 IC1 INPUT SELECT SW CTL 15 10 1 2 TU CVBS TU1 DIF OUT2 4 DIF OUT1 5 TUNER UNIT IF AGC 6 CN...

Страница 30: ...UDIO R IN1 JK302 1 3 RGB AUDIO L OUT2 RGB AUDIO R OUT2 6 RGB AUDIO L IN2 RGB AUDIO R IN2 POWER SUPPLY CBA JACK CBA TO DIGITALSIGNAL PROCESS BLOCK DIAGRAM TO DIGITALSIGNAL PROCESS BLOCK DIAGRAM DIGITAL...

Страница 31: ...S D0 TMDS D0 TMDS D1 TMDS D1 TMDS D2 TMDS D2 TMDS CLOCK TMDS CLOCK SDA SCL AF16 AE16 AF17 AE17 AF18 AE18 AF15 AE15 AB16 AC16 AF12 AE12 AF13 AE13 AF14 AE14 AF11 AE11 AC14 AC15 AF8 AE8 AF9 AE9 AF10 AE10...

Страница 32: ...1 FEED BACK IC1801 HIGH VOLTAGE RESONANT CONTROL TO POWER SUPPLY BLOCK DIAGRAM CN610 TO POWER SUPPLY BLOCK DIAGRAM CN600 HIGH VOLTAGE RESONANT CONTROL 8 12 13 2 14 9 5 4 1 4 3 2 1 4 3 2 Q1803 Q1804 Q1...

Страница 33: ...P ON 9V AL 3 3V 1 AL 5V AL 3 3V P ON 3 3V P ON 5V DIGITAL MAIN CBA UNIT P ON 3 3V 13 14 P ON 9V 6 2 3 LCD 12V 3 4 AL 3 3V 10 24 26 19 21 AL 5V 24 26 AL 3 3V 1 19 21 P ON 5V 27 29 CN600 CN601 4 2 3 15...

Страница 34: ...itute replacement parts that do not have the same safety characteristics as specified in the parts list may create shock fire or other hazards Notes 1 Do not use the part number shown on these drawing...

Страница 35: ...ed 2 To maintain original function and reliability of repaired units use only original replacement parts which are listed with their part numbers in the parts list section of the service manual 4 Volt...

Страница 36: ...electable power supply circuit is used in this unit If Main Fuse F601 is blown check to see that all components in the power supply circuit are not defective before you connect the AC plug to the AC p...

Страница 37: ...10 4 A03P3SCP2 Power Supply 2 Schematic Diagram...

Страница 38: ...10 5 A03P3SCP3 Power Supply 3 Jack Schematic Diagram...

Страница 39: ...10 6 A03P3SCINP Inverter Power Schematic Diagram NOTE The voltage for parts in hot circuit is measured using hot GND as a common terminal...

Страница 40: ...10 7 A03P3SCIRF IR Sensor Function Schematic Diagram...

Страница 41: ...Main 1 Schematic Diagram The order of pins shown in this diagram is different from that of actual IC3301 IC3301 is divided into six and shown as IC3301 1 6 IC3301 6 6 in this Digital Main Schematic D...

Страница 42: ...Main 2 Schematic Diagram The order of pins shown in this diagram is different from that of actual IC3301 IC3301 is divided into six and shown as IC3301 1 6 IC3301 6 6 in this Digital Main Schematic D...

Страница 43: ...l Main 3 Schematic Diagram The order of pins shown in this diagram is different from that of actual IC3301 IC3301 is divided into six and shown as IC3301 1 6 IC3301 6 6 in this Digital Main Schematic...

Страница 44: ...10 11 A03P3SCD4 Digital Main 4 Schematic Diagram...

Страница 45: ...l Main 5 Schematic Diagram The order of pins shown in this diagram is different from that of actual IC3301 IC3301 is divided into six and shown as IC3301 1 6 IC3301 6 6 in this Digital Main Schematic...

Страница 46: ...l Main 6 Schematic Diagram The order of pins shown in this diagram is different from that of actual IC3301 IC3301 is divided into six and shown as IC3301 1 6 IC3301 6 6 in this Digital Main Schematic...

Страница 47: ...l Main 7 Schematic Diagram The order of pins shown in this diagram is different from that of actual IC3301 IC3301 is divided into six and shown as IC3301 1 6 IC3301 6 6 in this Digital Main Schematic...

Страница 48: ...085 J086 J087 R557 J088 R558 R559 J089 C520 C521 C522 C523 C524 R560 J090 J091 C525 J092 R562 J093 C527 J094 C528 J095 R565 J096 R566 J097 J098 R34 R569 J481 R35 J099 J482 J483 C531 C532 J487 R570 R57...

Страница 49: ...D GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND P ON 5V P ON 5V P ON 5V PROTECT1 PROTECT1 PROTECT1 PROTECT1 PROTECT1 PROTECT1 ALL 3 3V ALL 3 3V ALL 3 3V ALL 3...

Страница 50: ...05B C1851 C1852 C1854 C1857 C1858 C1859 SW106B C1860 BC1851 IC1831 C1861 BC1852 IC1832 C1862 C1863 SW107B C1871 T1801 C1872 C1873 Q1871 D1851 D1852 D1853 D1854 D1855 R1851 R1852 R1853 D104 R1854 R1855...

Страница 51: ...1862 C1863 SW107B C1871 T1801 C1872 C1873 Q1871 D1851 D1852 D1853 D1854 D1855 R1851 R1852 R1853 D104 R1854 R1855 D105 R1856 R1857 D107 R1858 R1859 C1882 C1883 C1884 Q1882 Q1883 Q1884 D1871 D1872 D1873...

Страница 52: ...observed at Waveform check points Shown in Schematic Diagram S VIDEO Y 0 2V 20 s S VIDEO C 0 2V 20 s VIDEO Y 0 2V 20 s 20 s VIDEO Pr 0 2V 20 s VIDEO Pb 0 2V 20 s Pin 6 of CN404 WF5 VIDEO 0 2V 20 s WF...

Страница 53: ...n 28 of CN404 WF10 Pin 26 of CN404 AUDIO L 0 5V 0 5ms WF7 Pin 22 of CN401 20 s VIDEO G 0 5V 20 s VIDEO R 0 5V 20 s Input PAL Color Bar Signal with 1kHz Audio Signal WF7 WF10 Waveforms to be observed a...

Страница 54: ...GND AMP L OUT AUDIO MUTE GND REMOTE LED1 DIF OUT2 GND GND DIF OUT1 IF AGC GND SCL GND SIF SIF GND GND TU CVBS SDA BACKLIGHT SW GND 2 2 CN3701 CN402 1 5 3 9 7 2 4 6 8 10 14 12 18 16 11 13 15 5 3 7 2 4...

Страница 55: ...Supply CBA A9 L6 L6 L6 B18 L6 L6 L8 L6 B2 L6 L6 L9 L4 L6 B1 L13 A11 L1 L3 B11 B9 S6 L6 L1 L1 B17 B17 B17 B19 LCD 1 X803 B5 L6 L6 L6 L6 L6 L2 X3301 A3 L16 CL404 CL402 CL401 CL601 CL3903 CL452 CL1852 CL...

Страница 56: ...13 2 A03P0PEX Packing S4 S3 S1 Tape Packing Tape PP Band Packing Tape Packing Tape S2 S9 S5 X1 Some Ref Numbers are not in sequence X5 S6 Stand Cover Assembly X4 X3 FRONT FRONT X2 AC601...

Страница 57: ...2 CL601 WIRE ASSEMBLY 2PIN 2PIN 120MM AWG18 UL1 WX1A03P0 304 CL801 WIRE ASSEMBLY 2PIN 2PIN 400MM AWG24 UL1 WX1A03P0 203 CL802 WIRE ASSEMBLY 2PIN 2PIN 310MM AWG24 UL1 WX1A03P0 202 CL1852 WIRE ASSEMBLY...

Страница 58: ...C223 CHIP CERAMIC CAP 1608 B K 1000pF 50V CHD1JK30B102 C301 CHIP RES 1608 1 10W 0 or RRXAZR5Z0000 RES CHIP 1608 1 10W J 0 or RRXA000YF002 RES CHIP 1608 1 10W 0 RRJ000WAL002 C302 CHIP CERAMIC CAP 1608...

Страница 59: ...0 1 F 50V CHD1JK30B104 C811 CHIP CERAMIC CAP 1608 B K 0 1 F 50V CHD1JK30B104 C812 CHIP CERAMIC CAP 1608 B K 1 F 25V CHD1EK30B105 Ref No Description Part No C813 CHIP CERAMIC CAP 1608 B K 0 1 F 50V CHD...

Страница 60: ...8BSB T26 or NDTB018BST26 DIODE ZENER HZS18NB2TE EQ QDTBHZS18NB2 Ref No Description Part No D508 DIODE ZENER 8V2BSA T26 or NDTA8R2BST26 DIODE ZENER HZS8 2NB1TE EQ QDTA0HZS8R2N D511 SCHOTTKY BARRIER DIO...

Страница 61: ...AMP BD5426EFS E2 QSZBA0TRM137 Ref No Description Part No COILS L11 WIRE COPPER 6111 06003 0120 or XZ40C0SHG002 WIRE COPPER JP0 6MM XZ40C0AKM001 L21 WIRE COPPER 6111 06003 0120 or XZ40C0SHG002 WIRE CO...

Страница 62: ...NQSY2SA1980M PNP TRANSISTOR 2SA1980MG AT NQSG2SA1980M Q512 TRANSISTOR KTC3198 Y AT P or NQSYKTC3198P Ref No Description Part No TRANSISTOR KTC3199 GR AT P or NQS4KTC3199P TRANSISTOR KTC3198 GR AT P or...

Страница 63: ...RRXA000YF002 RES CHIP 1608 1 10W 0 RRJ000WAL002 R206 CHIP RES 1608 1 10W 0 or RRXAZR5Z0000 Ref No Description Part No RES CHIP 1608 1 10W J 0 or RRXA000YF002 RES CHIP 1608 1 10W 0 RRJ000WAL002 R208 CH...

Страница 64: ...02 Ref No Description Part No R335 CHIP RES 1 10W J 100 or RRXAJR5Z0101 RES CHIP 1608 1 10W J 100 or RRXA101YF002 RES CHIP 1608 1 10W J 100 RRJ101WAL002 R336 CHIP RES 1 10W J 75 or RRXAJR5Z0750 RES CH...

Страница 65: ...CARBON FILM T 1 4W J 100k RCX4104T1001 R586 CHIP RES 1608 1 10W 0 or RRXAZR5Z0000 RES CHIP 1608 1 10W J 0 or RRXA000YF002 Ref No Description Part No RES CHIP 1608 1 10W 0 RRJ000WAL002 R590 WIRE COPPER...

Страница 66: ...31 JK205 JACK SW RCA PCB S RED RCA 102H RD or JYRJ010YUQ03 JACK SW RCA PCB S RED 01 MTJ 032 04A 75 FE JYRJ010LY031 JK206 JACK HPEP SML PCB S PJ 358H or JXSJ020YUQ01 JACK HPEP SML PCB S 02 MSJ 035 29D...

Страница 67: ...C1863 ELECTROLYTIC CAP 1 F 50V M CE1JMASDL1R0 C1871 CAP CERAMIC AX 0 01 F 50V F Z CA1J103TU062 C1872 POLYESTER FILM CAP PB FREE 0 047 F 100V J or CA2A473DT018 CAP POLYESTER FILM 0 047 F 100V J or CA2...

Страница 68: ...iption Part No RES CARBON FILM T 1 4W J 2 2k RCX4222T1001 R1805 RES CARBON FILM T 1 4W J 39k or RCX4393T1001 RES CARBON FILM 1 4W J 39k RCX4393FS002 R1806 RES CARBON FILM T 1 4W J 390 or RCX4391T1001...

Страница 69: ...1104 H 5 0 or SST0101DNG02 TACT SWITCH KSM0612B SST0101HH003 SW103B TACT SWITCH SKQSAB or SST0101AL038 TACT SWITCH TC 1104 H 5 0 or SST0101DNG02 TACT SWITCH KSM0612B SST0101HH003 SW104B TACT SWITCH SK...

Страница 70: ...LT8 M40BB A03P3PH 2011 01 11 Ver 1...

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