FUNAI LH7-M19BB Service Manual Download Page 36 | Manualshive

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A93N2SCM3

Main 3/4 Schematic Diagram

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Summary of Contents for LH7-M19BB

Page 1: ...he LH7 M19BB A93N2EP model For the LH7 M19BB A93N2EP model the letter A93N2EP is printed on the Serial Number Label on the back of the unit Refer to the Serial Number Label on the right Serial No Labe...

Page 2: ...Initialize the LCD Television 6 1 Troubleshooting 7 1 Block Diagrams 8 1 Schematic Diagrams CBA and Test Points 9 1 Waveforms 10 1 Wiring Diagram 11 1 Exploded View 12 1 Mechanical Parts List 13 1 El...

Page 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...

Page 4: ...ghtly 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 Descri...

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: ...ccur 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 s...

Page 12: ...nplug or Desolder e g 2 S 2 two Screws S 2 2 L 2 two Locking Tabs L 2 5 Refer to the following Reference Notes in the Table Step Loc No Part Removal Fig No Remove Unhook Unlock Release Unplug Unclamp...

Page 13: ...4 2 A93N2DC 2 Rear Cabinet 1 Stand Assembly S 3 S 2 S 2 S 2 S 2 S 2 S 4 S 4 S 1 Fig D1...

Page 14: ...4 Power Supply CBA 7 Digital Main CBA Unit 8 LCD Module Assembly 9 Speaker 9 Speaker 10 Junction CBA 11 Function CBA 12 Front Cabinet S 8 S 10 S 10 S 6 S 6 S 6 S 11 S 5 S 8 S 12 S 12 S 9 H 1 Speaker H...

Page 15: ...N1001 CN301 Digital Main CBA Unit CN801 CN152 AC CORD CN3704 CN3401 CN3702 CN3703 CN3701 CN3901 CN302 CN303 CN404 CN401 CN802 CN1002 CN101A Junction CBA Function CBA CN101 CN101B To Speaker To LCD Mod...

Page 16: ...t A portion of the attached 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 th...

Page 17: ...ent mode press 6 button on the service remote control unit 4 To start auto adjustment press P button on the service remote control unit In the auto adjustment mode Calibration Check appears on the scr...

Page 18: ...ularly to the LCD Panel surface 4 Enter the Service mode 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 bu...

Page 19: ...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...

Page 20: ...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 each r...

Page 21: ...Check D634 and their periphery circuit and service it if defective Replace Q605 Is approximately 8V voltage supplied to the collector of Q616 Replace Q616 No AL 33V is not outputted FLOW CHART NO 7 Y...

Page 22: ...voltage supplied to the anode of D613 Is approximately 10V voltage supplied to the base of Q611 Yes Is approximately 14V voltage supplied to the base of Q615 No Check D664 and their periphery circuit...

Page 23: ...k D616 C614 and their periphery circuit and service it if defective Check D612 D620 C613 and their periphery circuit and service it if defective Check Q607 Q610 D639 and their periphery circuit and se...

Page 24: ...RGB 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 R...

Page 25: ...tted normally Audio input terminals FLOW CHART NO 20 Check the line between Pin 16 18 of CN303 and Pin 4 5 of TU10 and TU10 Tuner Unit and service it if defective Are the DIF signals outputted to Pin...

Page 26: ...LED1 B16 P ON H2 A12 REMOTE AD11 P ON H1 PROTECT1 P ON H2 P ON H1 AC11 JUNCTION CBA CN101 KEY IN1 6 6 CN152 CN303 CN3703 D16 BACKLIGHT ADJ IC3101 MEMORY SCL SDA AE4 AF3 6 5 IC3802 AUDIO SELECTOR SCL S...

Page 27: ...O Pr IN 8 8 VIDEO OUT 15 BUFFER Q10 TU CVBS 29 29 SCART OUT SEL 6 6 IC1 INPUT SELECT SW CTL 15 10 1 2 TU CVBS TU10 DIF OUT2 4 DIF OUT1 5 TUNER UNIT IF AGC 6 CN303 CN3703 DIF OUT2 16 16 IF AGC 20 20 DI...

Page 28: ...L CH AUDIO SELECTOR R CH 26 24 22 21 23 25 8 11 6 7 JK413 1 3 RGB AUDIO L OUT RGB AUDIO R OUT 6 RGB AUDIO L IN 2 RGB AUDIO R IN MAIN CBA TO DIGITALSIGNAL PROCESS BLOCK DIAGRAM TO DIGITALSIGNAL PROCESS...

Page 29: ...1 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 TMDS CLOCK TMDS CLOCK DEMODULATOR MPEG DECODER DEMOD...

Page 30: ...NTROL BACK LIGHT 1 2 CN1002 Q1001 Q1007 Q1016 Q1014 Q1005 Q1004 Q1006 Q1008 Q1012 Q1002 Q1011 Q1023 Q1024 DRIVE Q1010 Q1017 Q1018 DRIVE OSC PWM CONTROL LOGIC VCC DTC CURRENT CONTROL SWITCH Q1009 OVER...

Page 31: ...wer supply circuit to fail HOT COLD MAIN CBA HOT CIRCUIT BE CAREFUL Q602 SWITCHING CONTROL 1 4 3 2 IC605 T601 5 LINE FILTER L601 AC601 AC CORD BRIDGE RECTIFIER D602 D604 D605 D607 3 4 19 18 17 16 15 1...

Page 32: ...in the schematic diagram and the parts list Before replacing any of these components read the parts list in this manual carefully The use of substitute replacement parts that do not have the same safe...

Page 33: ...d 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 Volta...

Page 34: ...table 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 power...

Page 35: ...9 4 A93N2SCM2 Main 2 4 Schematic Diagram...

Page 36: ...9 5 A93N2SCM3 Main 3 4 Schematic Diagram...

Page 37: ...9 6 A93N2SCM4 Main 4 4 Schematic Diagram...

Page 38: ...9 7 A93N2SCF Function Junction Schematic Diagram...

Page 39: ...Main 1 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...

Page 40: ...Main 2 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...

Page 41: ...Main 3 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...

Page 42: ...9 11 A93N2SCD4 Digital Main 4 7 Schematic Diagram...

Page 43: ...Main 5 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...

Page 44: ...Main 6 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...

Page 45: ...Main 7 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...

Page 46: ...bleshooting this type power supply circuit a variable isolation transformer is required CAUTION Fixed voltage or Auto voltage selectable power supply circuit is used in this unit If Main Fuse F601 is...

Page 47: ...on transformer must be used Also in order to have the ability to increase the input slowly when troubleshooting this type power supply circuit a variable isolation transformer is required CAUTION Fixe...

Page 48: ...9 17 Function CBA Top View Function CBA Bottom View BA93N2F01012B Junction CBA Top View Junction CBA Bottom View BA93N2F01012...

Page 49: ...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...

Page 50: ...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...

Page 51: ...14 12 18 16 11 13 15 1 5 3 9 7 2 4 6 8 10 11 17 19 23 21 20 25 21 23 17 19 24 22 20 18 16 12 14 8 10 15 13 11 9 7 3 5 6 22 RESET 24 2 P ON H2 25 1 P ON H1 P ON 11V GND GND GND AL 3 3V P ON 3 3V GND GN...

Page 52: ...A Unit AC601 Function CBA Junction CBA Main CBA Stand Assembly L17 B13 B12 B12 B14 L9 L1 L1 L1 L1 L3 L1 L1 L4 A4 B3 L3 B18 A16 L19 L3 B1 B7 L3 L3 B7 B7 L11 L19 L3 B3 L2 L2 L3 L3 L8 L1 L8 B8 B8 A5 A1 A...

Page 53: ...12 2 A93N2PEX Packing S4 S5 S3 Tape Packing Tape Packing Tape Packing Tape Packing Tape S6 L17 X1 Some Ref Numbers are not in sequence Stand Assembly X3 X4 FRONT FRONT X2 1 X2 2 X2 3 X15 S2 S1 Tape...

Page 54: ...2 WIRE ASSEMBLY 2PIN WX1A93N0 001 WX1A93N0 001 CL3901 WIRE ASSEMBLY 24PIN FFC 24PIN 65MM WX1A94N0 106 L1 SCREW P TIGHT 3X10 BIND HEAD GBHP3100 L2 SCREW P TIGHT M3X8 BIND HEAD GBJP3080 L3 SCREW S TIGHT...

Page 55: ...CHIP CERAMIC CAP 1608 CH J 100pF 50V CHD1JJ3CH101 C410 CHIP CERAMIC CAP 1608 CH J 100pF 50V CHD1JJ3CH101 C416 CHIP CERAMIC CAP 1608 F Z 0 1 F 50V CHD1JZ30F104 C417 ELECTROLYTIC CAP 10 F 50V M H7 CE1JM...

Page 56: ...SL J CCC1000MR002 C1016 CHIP CERAMIC CAP 1608 B K 6800pF 50V CHD1JK30B682 C1018 CHIP CERAMIC CAP 1608 B K 0 1 F 50V CHD1JK30B104 C1019 CERAMIC CAP B K 220pF 500V CCD2JKS0B221 C1020 CHIP CERAMIC CAP 1...

Page 57: ...6 SWITCHING DIODE 1SS133 T 77 or QDTZ001SS133 Ref No Description Part No DIODE SWITCHING HSS4148TE E or QDTZ0HSS4148 DIODE SWITCHING 1N4148 F0021 NDTZ01N4148F D627 SWITCHING DIODE 1SS133 T 77 or QDTZ0...

Page 58: ...1N4148 F0021 NDTZ01N4148F D1023 SWITCHING DIODE 1SS133 T 77 or QDTZ001SS133 DIODE SWITCHING HSS4148TE E or QDTZ0HSS4148 DIODE SWITCHING 1N4148 F0021 NDTZ01N4148F D1024 SWITCHING DIODE 1SS133 T 77 or...

Page 59: ...TRANSISTOR PB FREE KTC2026 Y P or NQEYKTC2026P NPN TRANSISTOR STC403 NQEZ00STC403 Ref No Description Part No Q607 TRANSISTOR KTC3199 GR AT P or NQS4KTC3199P TRANSISTOR KTC3198 GR AT P or NQS4KTC3198P...

Page 60: ...STOR 2SA1980M Y or NQSY2SA1980M PNP TRANSISTOR 2SA1980MG AT NQSG2SA1980M Ref No Description Part No Q1008 TRANSISTOR KTC3198 Y AT P or NQSYKTC3198P TRANSISTOR KTC3199 GR AT P or NQS4KTC3199P TRANSISTO...

Page 61: ...608 1 10W J 0 RRXA000YF002 R24 CHIP RES 1608 1 10W 0 or RRXAZR5Z0000 RES CHIP 1608 1 10W J 0 RRXA000YF002 R25 CHIP RES 1608 1 10W 0 or RRXAZR5Z0000 Ref No Description Part No RES CHIP 1608 1 10W J 0 R...

Page 62: ...AJR5Z0122 Ref No Description Part No RES CHIP 1608 1 10W J 1 2k RRXA122YF002 R468 CHIP RES 1 10W J 1 2k or RRXAJR5Z0122 RES CHIP 1608 1 10W J 1 2k RRXA122YF002 R469 CHIP RES 1 10W J 100 or RRXAJR5Z010...

Page 63: ...10W J 47k RRXA473YF002 R659 RES CARBON FILM T 1 4W J 2 7k or RCX4272T1001 Ref No Description Part No RES CARBON FILM 1 4W J 2 7k RCX4272FS002 R660 RES CARBON FILM T 1 4W J 1 8k or RCX4182T1001 RES CA...

Page 64: ...FILM 1 4W J 27k RCX4273FS002 R1013 RES CARBON FILM T 1 4W J 12k or RCX4123T1001 Ref No Description Part No RES CARBON FILM 1 4W J 12k RCX4123FS002 R1014 RES CARBON FILM T 1 4W J 27k or RCX4273T1001 R...

Page 65: ...1 10W F 1 00M RTW1004YF002 R1089 CHIP RES 1 10W F 12k or RRXAFR5H1202 CHIP RES 1608 1 10W F 12k or RRXAFR5Z1202 Ref No Description Part No RES CHIP 1608 1 10W F 12 0k RTW1202YF002 R1090 CHIP RES 1 10W...

Page 66: ...2SC5343M Y NQSY2SC5343M Q102 TRANSISTOR KTA1267 GR AT P or NQS1KTA1267P TRANSISTOR KTA 1266 GR AT P or NQS4KTA1266P TRANSISTOR 2SA1015 Y TE2 F T or QQSY2SA1015F Ref No Description Part No TRANSISTOR 2...

Page 67: ...20090708 14 13 A93N2EL Ref No Description Part No MISCELLANEOUS TU10 TUNER UNIT DT0S40AML201A UTNPSG0SM001...

Page 68: ...LH7 M19BB A93N2EP 2009 07 23...

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