FUNAI A0CA2EP Service Manual Download Page 1

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SERVICE MANUAL

This Service Manual is for the LH850-M26 (A0CA2EP) model.
For the LH850-M26 (A0CA2EP) model, the letter (A0CA2EP) is printed on
the Serial Number Label on the back of the unit. Refer to the Serial
Number Label below.

Serial No. Label

"A0CA2EP"

″

COLOR LCD TELEVISION

LH850-M26

Summary of Contents for A0CA2EP

Page 1: ...r the LH850 M26 A0CA2EP model For the LH850 M26 A0CA2EP model the letter A0CA2EP is printed on the Serial Number Label on the back of the unit Refer to the Serial Number Label below Serial No Label A0...

Page 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...

Page 3: ...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 HIGH 8ch UHF 45ch dBuV d...

Page 4: ...htly 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 Descrip...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 12: ...s in the Table Step Loc No Part Removal Fig No Remove Unhook Unlock Release Unplug Unclamp Desolder Note 1 Stand Assembly D1 4 S 1 2 Rear Cabinet D1 11 S 2 2 S 3 S 4 3 Inverter CBA D2 D3 6 S 5 CN407 C...

Page 13: ...4 2 A0CA0DC 2 Rear Cabinet S 1 1 Stand Assembly S 2 S 2 S 3 S 2 S 4 S 2 S 2 S 2 Fig D1...

Page 14: ...and Holder 12 LCD Module Assembly 14 Function CBA 15 Front Cabinet 13 Speaker 6 Jack Holder 4 Tuner Shield 8 Jack Holder HP SW S 5 S 15 S 14 S 5 S 16 S 17 Shield Box Speaker Holder R S 9 S 9 S 10 H 1...

Page 15: ...y CBA Inverter CBA Function CBA To LCD Module Assembly To Speaker To Speaker CN3901 CN3701 CN402 CN403 CN404 CN401 CN202 CN3703 CN3702 CN3704 Digital Main CBA Unit To LCD Module Assembly CL900B CN1201...

Page 16: ...stments unless the proper equipment is available Test Equipment Required 1 NTSC Pattern Generator Color Bar W White Window Red Color Dot Pattern Gray Scale Monoscope Multi Burst 2 Remote control unit...

Page 17: ...he LCD Panel surface 3 Enter the Service mode 4 To enter the VCOM 2 adjustment mode press 3 button on the remote control unit To enter the VCOM 1 adjustment mode press 2 button on the remote control u...

Page 18: ...de 5 CUTOFF Press 1 button to select COR for Red Cutoff adjustment Press 3 button to select COB for Blue Cutoff adjustment DRIVE Press 4 button to select DR for Red Drive adjustment Press 6 button to...

Page 19: ...the service mode Refer to page 5 1 To cancel the service mode press button on the remote control unit 3 Press button on the remote control unit to initialize the LCD television 4 INITIALIZED will app...

Page 20: ...h digit of the file name indicate the size of TV If the size of your TV and the file name were not the same you must change the file name Update procedure 1 Plug in the AC power cord 2 Press button on...

Page 21: ...rcuit 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 or circuit is shorted in...

Page 22: ...s not output FLOW CHART NO 8 Is approximately 18V voltage supplied to the cathode of D504 No Yes Yes Check D504 D505 C503 and their periphery circuit and service it if defective Replace Q503 Is approx...

Page 23: ...their periphery circuit and service it if defective No P ON 9V is not output FLOW CHART NO 12 Yes No Is approximately 12V voltage supplied to the collector of Q517 Is approximately 10V voltage suppli...

Page 24: ...periphery circuit and service it if defective Check D539 D540 C522 and their periphery circuit and service it if defective Check Q508 Q520 D541 D542 P ON H2 line and their periphery circuit and servic...

Page 25: ...is not outputted normally Audio input terminals FLOW CHART NO 19 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 output...

Page 26: ...5 5 PROTECT1 4 4 PROTECT3 4 4 VCOM PWM 2 2 BACKLIGHT SW 1 1 BACKLIGHT ADJ KEY IN1 11 11 P ON H1 1 1 REMOTE 13 13 LED1 14 14 P ON H2 2 2 PROTECT3 1 BACKLIGHT SW 2 BACKLIGHT ADJ 3 10 VCOM Q182 C25 IC33...

Page 27: ...IN 29 29 S VIDEO Y IN 27 27 COM VIDEO Y IN 4 4 COM VIDEO Pb IN 6 6 COM VIDEO Pr IN 8 8 VIDEO OUT 15 BUFFER Q11 TU CVBS 29 29 TU CVBS TU1 DIF OUT2 4 DIF OUT1 5 TUNER UNIT IF AGC 6 CN403 CN3703 DIF OUT...

Page 28: ...0 AMP R OUT 8 8 AUDIO MUTE 12 12 WF7 RGB AUDIO L OUT 6 6 RGB AUDIO R OUT 7 7 RGB AUDIO L OUT2 12 12 RGB AUDIO R OUT2 13 13 20 IC803 AUDIO AMP 1 44 9 10 13 14 35 36 31 32 MUTE CONTROL CN802 CN202 CL251...

Page 29: ...F10 AE11 TMDS CLOCK TMDS CLOCK DEMODULATOR MPEG DECODER DEMODU ADC DAC AUDIO I F RDQ 0 31 MRA 0 12 IC3201 IC3202 DDR2 SDRAM Q3302 Q3301 HDMI I F HDMI IN3 7 9 4 6 1 3 10 12 16 15 JK3702 TMDS D0 TMDS D0...

Page 30: ...B Q1101 T1203 INVERTER CONTROL LOGIC DRIVE1 VDDA DRIVE2 Q1102 Q1112 Q1113 9 10 13 14 11 16 1 6 8 Q1012 Q1009 Q1006 LCD MODULE ASSEMBLY T1201 BACK LIGHT 1 2 CN1201 TO SYSTEM CONTROL BLOCK DIAGRAM CN407...

Page 31: ...CN601 AC1 AC CORD 16 15 10 14 9 13 11 FEED BACK Q512 Q513 CN406 CN402 CN407 CL900B CN3701 Q504 Q505 SWITCHING Q509 SW 7V Q503 D506 SW 12 5V Q516 Q514 Q511 Q508 Q518 SW 5V Q521 D522 Q517 SW 9V Q510 D52...

Page 32: ...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...

Page 33: ...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...

Page 34: ...10 3 A0CA2SCP1 Power Supply 1 Schematic Diagram NOTE The voltage for parts in hot circuit is measured using hot GND as a common terminal...

Page 35: ...10 4 A0CA2SCP2 Power Supply 2 Schematic Diagram...

Page 36: ...10 5 A0CA2SCP3 Power Supply 3 Schematic Diagram...

Page 37: ...10 6 A0CA2INV Inverter Schematic Diagram...

Page 38: ...that all components in the power supply circuit are not defective before you connect the AC plug to the AC power supply Otherwise it may cause some components in the power supply circuit to fail CAUTI...

Page 39: ...10 8 A0CA2SCF Function Schematic Diagram...

Page 40: ...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 7 IC3301 7 7 in this Digital Main Schematic D...

Page 41: ...l 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 7 IC3301 7 7 in this Digital Main Schematic...

Page 42: ...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 7 IC3301 7 7 in this Digital Main Schematic...

Page 43: ...l Main 4 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 7 IC3301 7 7 in this Digital Main Schematic...

Page 44: ...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 7 IC3301 7 7 in this Digital Main Schematic...

Page 45: ...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 7 IC3301 7 7 in this Digital Main Schematic...

Page 46: ...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 7 IC3301 7 7 in this Digital Main Schematic...

Page 47: ...52 J387 J388 J389 J390 J391 J392 J393 J394 J396 Q510 Q517 Q518 Q520 J401 J404 J408 J409 J411 J416 J419 J420 Q181 J421 J422 Q182 J424 J426 J427 J428 J429 J430 J431 J432 J434 J435 J436 J437 R537 J461 R5...

Page 48: ...437 J439 L11 R526 J443 J445 J446 J448 J449 R341 R535 R342 R537 J450 J451 J452 J453 R540 BC11 R14 J462 R18 J468 C517 J471 R559 J474 J475 C521 J476 R560 J288 R565 R566 J482 C531 R580 R581 Q401 Q402 Q403...

Page 49: ...S1001 JS1002 JS1003 J1059 J1033 11 1 C7A3 A3 J1064 J1066 BA0CA0F0102 2 A D1103 T1201 T1202 J1000 J1001 J1002 J1004 J1005 J1006 C1113 C1114 C1115 J1009 J1010 C1142 C1143 D1106 C7A3 A3 CH SW103 SW104 SW...

Page 50: ...2 C F701 R250 COLD 11 1 C110 C112 R116 R115 R114 R113 R111 R126 R128 C114 C104 R127 R117 C1122 C1123 R1102 R1103 IC1101 R1116 R1117 R1118 R1119 R1120 R1121 R1123 R1124 C1003 C1005 C1006 C1007 C1008 C...

Page 51: ...tic Diagram S VIDEO Y S VIDEO Y 0 2V 0 2V 20 20 s S VIDEO C S VIDEO C 0 2V 0 2V 20 20 s VIDEO Y VIDEO Y 0 2V 0 2V 20 20 s 20 20 s VIDEO Pr VIDEO Pr 0 2V 0 2V 20 20 s VIDEO Pb VIDEO Pb 0 2V 0 2V 20 20...

Page 52: ...Pin 26 of CN404 AUDIO L AUDIO L 0 5V 0 5V 0 5m 0 5ms WF7 Pin 22 of CN401 20 20 s VIDEO G VIDEO G 0 5V 0 5V 20 20 s VIDEO R VIDEO R 0 5V 0 5V 20 20 s Input PAL Color Bar Signal with 1kHz Audio Signal W...

Page 53: ...ND AL 3 3V P ON 3 3V GND GND P ON 3 3V GND P ON 3 3V NU P ON 3 3V NU GND AL 3 5V AL 3 5V AL 3 5V GND GND GND 26 AL 5V 27 P ON 5V 28 P ON 5V 29 25 24 26 27 28 29 26 27 28 29 26 27 28 29 26 27 28 29 23...

Page 54: ...A Power Supply CBA Stand Assembly L17 B9 B10 B10 L6 L6 A6 L6 L6 L6 L6 L6 L6 L1 L1 L1 L1 L1 L2 L10 L1 L1 L6 A4 L1 L1 B13 B4 L14 L4 A11 B1 B17 B17 B44 L4 L6 L9 L6 L2 L2 B5 B18 A3 A1 A2 L8 S6 A8 L3 L3 A1...

Page 55: ...13 2 A0CA0PEX Packing S5 S3 S3 S1 Tape Tape Packing Tape Packing Tape S2 S7 X1 Some Ref Numbers are not in sequence L17 S6 Stand Assembly X4 X3 FRONT FRONT X2 1 X2 2 S2...

Page 56: ...403 WIRE ASSEMBLY 29PIN FFC 29PIN 50MM WX1A94F0 101 CL404 WIRE ASSEMBLY 29PIN FFC 29PIN 50MM WX1A94F0 101 CL406 WIRE ASSEMBLY 11PIN FFC 11PIN 90MM WX1A9170 107 CL801 WIRE ASSEMBLY 2PIN 2PIN 160MM AWG2...

Page 57: ...CHIP 1608 J C0G 100pF 50V CHD101EYA030 C214 CHIP CERAMIC CAP 1608 CH J 100pF 50V or CHD1JJ3CH101 CAP CHIP 1608 J C0G 100pF 50V CHD101EYA030 C215 CHIP CERAMIC CAP 1608 CH J 100pF 50V or CHD1JJ3CH101 C...

Page 58: ...or CA2A104DT018 CAP POLYESTER FILM 0 1 F 100V J or CA2A104SER02 CAP POLYESTER FILM 0 1 F 100V J PCMT or CTA104PKR003 Ref No Description Part No POLYESTER FILM CAP 0 1 F 100V J CMB104EUR001 C521 ELECT...

Page 59: ...270pF 50V or CHD1JJ3CH271 CAP CHIP 1608 J C0G 270pF 50V CHD271EYA030 C837 CHIP CERAMIC CAP 1608 CH J 100pF 50V or CHD1JJ3CH101 CAP CHIP 1608 J C0G 100pF 50V CHD101EYA030 C838 CHIP CERAMIC CAP 1608 B K...

Page 60: ...CHING HSS4148TE E or QDTZ0HSS4148 Ref No Description Part No DIODE SWITCHING 1N4148 F0021 NDTZ01N4148F D502 SWITCHING DIODE 1SS133 T 77 or QDTZ001SS133 DIODE SWITCHING HSS4148TE E or QDTZ0HSS4148 DIOD...

Page 61: ...021 NDTZ01N4148F D637 DIODE FR104 B or NDLZ000FR104 DIODE FR104BB NDL1000FR104 D638 DIODE FR104 B or NDLZ000FR104 DIODE FR104BB NDL1000FR104 Ref No Description Part No D639 DIODE ZENER 5V6BSB T26 or N...

Page 62: ...2SA1015F PNP TRANSISTOR 2SA1980Y AT or NQSY02SA1980 PNP TRANSISTOR 2SA1980 G or NQSG02SA1980 Ref No Description Part No PNP TRANSISTOR 2SA1980M Y or NQSY2SA1980M PNP TRANSISTOR 2SA1980MG AT NQSG2SA198...

Page 63: ...KTC3198 Y AT P or NQSYKTC3198P TRANSISTOR KTC3199 GR AT P or NQS4KTC3199P TRANSISTOR KTC3198 GR AT P or NQS4KTC3198P TRANSISTOR 2SC1815 Y TE2 F T or QQSY2SC1815F Ref No Description Part No TRANSISTOR...

Page 64: ...FILM T 1 4W J 56 or RCX4560T1001 Ref No Description Part No RES CARBON FILM 1 4W J 56 RCJ560PAK001 R342 RES CARBON FILM 1 4W J 56 or RCX4560FS002 RES CARBON FILM T 1 4W J 56 or RCX4560T1001 RES CARBON...

Page 65: ...R 6111 06003 0120 or XZ40C0SHG002 WIRE COPPER JP0 6MM XZ40C0AKM001 Ref No Description Part No R547 RES CARBON FILM 1 4W J 270 or RCX4271FS002 RES CARBON FILM T 1 4W J 270 or RCX4271T1001 RES CARBON FI...

Page 66: ...1 4W J 1 0k or RCX4102T1001 RES CARBON FILM 1 4W J 1 0k RCJ102PAK001 R649 RES CARBON FILM 1 4W J 10k or RCX4103FS002 RES CARBON FILM T 1 4W J 10k or RCX4103T1001 Ref No Description Part No RES CARBON...

Page 67: ...B 75 FE or JXRJ010LY028 JACK PCA PCB S RED 01 RCA 101HF RD JXRJ01YUQ007 JK204 JACK RCA PCB S WHITE 01 RCA 101H WH or JXRJ010YUQ02 JACK RCA PCB S WHITE 01 MTJ 032 04B 41 FE or JXRJ010LY031 JACK RCA PCB...

Page 68: ...CA1J102TU061 CERAMIC CAP AX B K 1000pF 50V CCA1JKT0B102 C1207 CAP CERAMIC HV 10pF 6 3KV SL J or CCA1000MR001 CAP CERAMIC HV 10pF 6 3KV SL J or CCC1000MR007 CAP CERAMIC HV 10pF 6KV SL J CCK1000TE009 C1...

Page 69: ...G AT NQSG2SA1980M Q1006 TRANSISTOR KTC3198 Y AT P or NQSYKTC3198P TRANSISTOR KTC3199 GR AT P or NQS4KTC3199P Ref No Description Part No TRANSISTOR KTC3198 GR AT P or NQS4KTC3198P TRANSISTOR 2SC1815 Y...

Page 70: ...0W J 2 2k or RRXAJR5Z0222 RES CHIP 1608 1 10W J 2 2k RRXA222YF002 R1137 CHIP RES 1 10W F 27k or RRXAFR5H2702 Ref No Description Part No CHIP RES 1608 1 10W F 27k or RRXAFR5Z2702 RES CHIP 1608 1 10W F...

Page 71: ...632A SST0101HH025 SW104 TACT SWITCH SKHHLMA010 or SST0101AL049 TACT SWITCH KSMC632A SST0101HH025 Ref No Description Part No SW105 TACT SWITCH SKHHLMA010 or SST0101AL049 TACT SWITCH KSMC632A SST0101HH0...

Page 72: ...AKM001 JS709 WIRE COPPER 6111 06003 0120 or XZ40C0SHG002 WIRE COPPER JP0 6MM XZ40C0AKM001 TM701 EYELET TYPE D 1 0VM406868 TM702 EYELET TYPE D 1 0VM406868 Ref No Description Part No TU1 TUNER UNIT DTOS...

Page 73: ...LH850 M26 A0CA2EP 2010 08 11...

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