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FUNAI LH850-M32 Service Manual Download Page 36

10-3

A0CF2SCP1

Power Supply 1 & Power SW Schematic Diagram

NOTE:

The voltage for parts in hot circuit is measured using 
hot GND as a common terminal.

CAUTION !

Fixed voltage (or Auto voltage selectable) 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 supply. 
Otherwise it may cause some components in the power supply circuit to fail.  

CAUTION !

For continued protection against fire hazard,
replace only with the same type fuse.

Summary of Contents for LH850-M32

Page 1: ...r the LH850 M32 A0CF2EP model For the LH850 M32 A0CF2EP model the letter A0CF2EP 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: ...able 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 13 S 2 2 S 3 3 S 4 S 5 3 Inverter CBA D2 D5 6 S 6 CN1001 CN10...

Page 13: ...4 2 A0CF2DC 2 Rear Cabinet 1 Stand Assembly S 4 S 4 S 2 S 3 S 2 S 2 S 2 S 1 S 5 Fig D1...

Page 14: ...ner Shield 6 Jack Holder 5 Power Supply CBA 8 Digital Main CBA Unit 3 Inverter CBA S 8 S 8 S 9 H 1 S 7 S 11 S 10 S 10 S 12 S 12 S 12A S 8 Jack Holder HP 7 Shield Box Fig D2 S 14 S 13 9 Power SW CBA 10...

Page 15: ...4 4 A0CF2DC S 17 S 16 S 15 Hook S 18 15 LCD Module Assembly 13 IR Sensor CBA 14 Function CBA 11 Speaker Holder R 11 Speaker Holder L 12 Speaker 16 Front Cabinet S 15 Hook 12 Speaker Fig D4...

Page 16: ...0 CN1150 CN1200 Digital Main CBA Unit CN1900 Inverter CBA CN801 CN101 AC Cord CN3704 CN3702 CN3703 CN3701 CN3901 CN401 CN404 CN403 CN402 CN802 CN600 POWER SW CBA Function CBA CL103B IR Sensor CBA To S...

Page 17: ...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 18: ...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 19: ...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 20: ...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 21: ...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 22: ...nd 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 re...

Page 23: ...approximately 6V voltage supplied to the base of Q518 AL 3 3V is not output FLOW CHART NO 6 Yes No Is approximately 6V voltage supplied to the collector of Q521 Check D525 C516 and their periphery ci...

Page 24: ...e base of Q509 Yes Is approximately 17V voltage supplied to the base of Q503 No Check Q504 Q505 D506 D507 P ON H1 line and their periphery circuit and service it if defective LCD 24V is not output FLO...

Page 25: ...nd service it if defective Check the composite video signal line and service it if defective Check the component video Y Pb Pr signal line and service it if defective Check the line between each pin o...

Page 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...

Page 27: ...utted normally Audio input terminals FLOW CHART NO 18 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 1...

Page 28: ...22 SDA 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 6 PROTECT3 5 BACKLIGHT SW 4 BACKLIGHT ADJ 14 VCOM Q182 C...

Page 29: ...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 Q011 TU CVBS 29 29 TU CVBS TU1 DIF OUT2 4 DIF OUT1 5 TUNER UNIT IF AGC 6 CN403 CN3703 DIF OUT...

Page 30: ...OUT 10 10 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 CL...

Page 31: ...A2 AF10 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 TM...

Page 32: ...1932 IC1000 PWM CONTROL BACK LIGHT 1 2 1 2 1 2 CN1100 CN1150 CN1200 BACK LIGHT BACK LIGHT T1100 Q1551 Q1552 Q1553 Q1003 Q1600 Q1065 Q1115 Q1165 Q1500 Q1801 Q1802 Q1803 Q1804 Q1800 Q1815 Q1004 Q1005 Q1...

Page 33: ...C607 T601 TO INVERTER BLOCK DIAGRAM CN1900 CN600 CN601 CN701 2 HOT GND 1 ACL 2 LINE FILTER L601 L602 AC701 AC CORD BRIDGE RECTIFIER D609 D612 4 3 16 15 10 14 9 13 12 11 6 7 FEED BACK Q601 SWITCHING Q5...

Page 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...

Page 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...

Page 36: ...ge selectable 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...

Page 37: ...10 4 A0CF2SCP2 Power Supply 2 Schematic Diagram...

Page 38: ...10 5 A0CF2SCP3 Power Supply 3 Schematic Diagram...

Page 39: ...10 6 A0CF2INV Inverter Schematic Diagram NOTE The voltage for parts in hot circuit is measured using hot GND as a common terminal...

Page 40: ...10 7 A0CF2SCF Function IR Sensor Schematic Diagram...

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

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

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

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

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

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

Page 48: ...when troubleshooting this type of 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...

Page 49: ...ansformer must be used when repairing Also in order to have the ability to increase the input slowly when troubleshooting this type of power supply circuit a variable isolation transformer is required...

Page 50: ...CBA Function CBA IR Sensor CBA Power SW CBA Top View BA0CF0F01021 Function CBA Not use IR Sensor CBA Inverter CBA Power SW CBA NOTE The voltage for parts in hot circuit is measured using hot GND as a...

Page 51: ...A Function CBA IR Sensor CBA Power SW CBA Bottom View BA0CF0F01021 Function CBA Not use IR Sensor CBA Inverter CBA Power SW CBA NOTE The voltage for parts in hot circuit is measured using hot GND as a...

Page 52: ...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 53: ...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 54: ...12 11 1 5 3 9 7 2 4 6 8 10 11 13 15 5 3 9 7 2 4 6 8 10 14 12 11 13 15 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 GN...

Page 55: ...CBA AC701 B6 L4 IR Sensor CBA Function CBA CL801 CL802 SP802 SP801 Power Supply CBA Power SW CBA B16 A6 A2 A11 Stand Assembly L6 L6 L6 L4 L6 B18 L2 L5 L1 L2 L1 L7 L3 L3 B12 B11 B11 B9 B10 S6 L6 L2 L2...

Page 56: ...13 2 A0CF0PEX Packing S5 S3 S1 Tape Tape Packing Tape Packing Tape S2 S2 S9 S8 S7 X1 Some Ref Numbers are not in sequence L7 X2 2 S6 Stand Assembly X4 X3 FRONT FRONT X2 1...

Page 57: ...D BLACK WX1A94F0 203 CL802 WIRE ASSEMBLY 2PIN 2PIN 310MM RED BLACK WX1A0CF0 103 CL1003 WIRE ASSEMBLY 11PIN FFC 11PIN 110MM WX1A94F0 105 CL3901 WIRE ASSEMBLY 24PIN FFC 24PIN 117 5MM WX1A91F6 102 L2 SCR...

Page 58: ...CAP 1608 CH J 100pF 50V or CHD1JJ3CH101 CAP CHIP 1608 J C0G 100pF 50V CHD101EYA030 C213 CHIP CERAMIC CAP 1608 CH J 100pF 50V or CHD1JJ3CH101 CAP CHIP 1608 J C0G 100pF 50V CHD101EYA030 C214 CHIP CERAM...

Page 59: ...AMZPDL222 CAP ELE 2200 F 10V M 85 or CEB222KSN002 CAP ELE 2200 F 10V M 85 CEB222TEP002 C517 ELECTROLYTIC CAP 1000 F 10V M or CE1AMASDL102 Ref No Description Part No CAP ELE 1000 F 10V M 85 or CEB102KS...

Page 60: ...P 1608 CH J 100pF 50V or CHD1JJ3CH101 CAP CHIP 1608 J C0G 100pF 50V CHD101EYA030 C838 CHIP CERAMIC CAP 1608 B K 1000pF 50V CHD1JK30B102 C839 CHIP CERAMIC CAP 1608 B K 1000pF 50V CHD1JK30B102 C840 CHIP...

Page 61: ...Z0HSS4148 DIODE SWITCHING 1N4148 F0021 NDTZ01N4148F Ref No Description Part No D511 SCHOTTKY BARRIER DIODE SB340 NDWZ000SB340 D512 DIODE ZENER 24BSB T26 or NDTB024BST26 DIODE ZENER HZS24NB2TE EQ QDTBH...

Page 62: ...J 26T LLAXJATTUR22 L301 INDUCTOR 4 7 H J 26T LLAXJATTU4R7 L302 INDUCTOR 4 7 H J 26T LLAXJATTU4R7 Ref No Description Part No L303 INDUCTOR 12 H J 26T LLAXJATTU120 L304 INDUCTOR 12 H J 26T LLAXJATTU120...

Page 63: ...STOR 2SC1815 Y TE2 F T or QQSY2SC1815F TRANSISTOR 2SC1815 GR TE2 F T or QQS12SC1815F Ref No Description Part No NPN TRANSISTOR 2SC5343Y AT or NQSY02SC5343 NPN TRANSISTOR 2SC5343G AT or NQSG02SC5343 NP...

Page 64: ...RES 1 10W J 15k or RRXAJR5Z0153 RES CHIP 1608 1 10W J 15k RRXA153YF002 R210 CHIP RES 1 10W J 47k or RRXAJR5Z0473 Ref No Description Part No RES CHIP 1608 1 10W J 47k RRXA473YF002 R211 CHIP RES 1 10W...

Page 65: ...10k RRXA103YF002 Ref No Description Part No R423 CHIP RES 1 10W J 10k or RRXAJR5Z0103 RES CHIP 1608 1 10W J 10k RRXA103YF002 R501 RES CARBON FILM 1 4W J 3 3 or RCX43R3FS002 RES CARBON FILM T 1 4W J 3...

Page 66: ...47 RCJ470PAK001 R570 RES CARBON FILM 1 4W J 1 8k or RCX4182FS002 Ref No Description Part No RES CARBON FILM T 1 4W J 1 8k or RCX4182T1001 RES CARBON FILM 1 4W J 1 8k RCJ182PAK001 R572 METAL OXIDE FILM...

Page 67: ...0STU030 BEAD INDUCTOR B29 RID 2 3X7 5X7 5T LLEF0S0XM002 F601 FUSE 4A 250V PB FREE 0215004 MXP PBGZ20BAG021 Ref No Description Part No FH605 FUSE HOLDER MSF 015 LF B110 XH01Z00LY002 FH606 FUSE HOLDER M...

Page 68: ...JMASDL100 CAP ELE 10 F 50V M 85 or CEF100KSN001 CAP ELE 10 F 50V M 85 CEF100TEP001 C1065 CAP CERAMIC HV 15pF 6 3KV SL J or CCA1500MR001 CAP CERAMIC HV 15pF 6 3KV SL J or CCC1500MR007 CAP CERAMIC HV 15...

Page 69: ...o Description Part No D1006 SWITCHING DIODE 1SS133 T 77 or QDTZ001SS133 DIODE SWITCHING HSS4148TE E or QDTZ0HSS4148 DIODE SWITCHING 1N4148 F0021 NDTZ01N4148F D1040 DIODE ZENER 36BSB T26 or NDTB036BST2...

Page 70: ...3 DIODE SWITCHING HSS4148TE E or QDTZ0HSS4148 DIODE SWITCHING 1N4148 F0021 NDTZ01N4148F D1220 SWITCHING DIODE 1SS133 T 77 or QDTZ001SS133 DIODE SWITCHING HSS4148TE E or QDTZ0HSS4148 Ref No Description...

Page 71: ...FET MOS 2SK2417 FT or QFWZSK2417FT MOS FET 2SK3454 AZ QFWZSK3454AZ Ref No Description Part No Q1551 TRANSISTOR 2SC2120 Y TE2 F T or QQSY2SC2120F TRANSISTOR 2SC2120 O TE2 F T or QQS02SC2120F TRANSISTO...

Page 72: ...ILM 1 4W J 56k RCJ563PAK001 R1007 CHIP RES 1 10W J 10k or RRXAJR5Z0103 RES CHIP 1608 1 10W J 10k RRXA103YF002 Ref No Description Part No R1008 CHIP RES 1 10W J 2 2k or RRXAJR5Z0222 RES CHIP 1608 1 10W...

Page 73: ...N FILM T 1 4W J 150 or RCX4151T1001 Ref No Description Part No RES CARBON FILM 1 4W J 150 RCJ151PAK001 R1503 RES CARBON FILM 1 4W J 2 2k or RCX4222FS002 RES CARBON FILM T 1 4W J 2 2k or RCX4222T1001 R...

Page 74: ...RBON FILM 1 4W J 5 6k RCJ562PAK001 Ref No Description Part No R1970 RES CARBON FILM 1 4W J 1 5k or RCX4152FS002 RES CARBON FILM T 1 4W J 1 5k or RCX4152T1001 RES CARBON FILM 1 4W J 1 5k RCJ152PAK001 R...

Page 75: ...ITCH KSMC632A SST0101HH025 SW107A TACT SWITCH SKHHLMA010 or SST0101AL049 TACT SWITCH KSMC632A SST0101HH025 Ref No Description Part No IR SENSOR CBA Consists of the following CAPACITORS C113 ELECTROLYT...

Page 76: ...LH850 M32 A0CF2EP 2010 08 10...

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