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SERVICE MANUAL

This Service Manual is for the
LH7-M22BB (A9372EP) model.
For the LH7-M22BB (A9372EP)
model, the letter (A9372EP) is
printed on the Serial Number Label
on the back of the unit. Refer to the
Serial Number Label on the right.

Serial No. Label

"A9372EP"

P27910001 - A9372EP

MANUFACTURED :

JULY

2009 P

″

COLOR LCD TELEVISION

LH7-M22BB

Содержание LH7-M22BB

Страница 1: ...odel For the LH7 M22BB A9372EP model the letter A9372EP is printed on the Serial Number Label on the back of the unit Refer to the Serial Number Label on the right Serial No Label A9372EP P27910001 A9...

Страница 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...

Страница 3: ...0 to 80 75 to 75 70 to 70 Description 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 10...

Страница 4: ...slightly 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 Des...

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: ...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...

Страница 12: ...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 Desolder Note 1 Stand Assembly D1 3 S 1...

Страница 13: ...4 2 A9372DC 2 Rear Cabinet 1 Stand Assembly S 3 S 2 S 2 S 2 S 2 S 2 S 4 S 1 Fig D1...

Страница 14: ...der 6 Jack CBA 4 Main CBA 9 Digital Main CBA Unit 10 LCD Module Assembly 11 Speaker 11 Speaker 12 Junction CBA 13 Function CBA 14 Front Cabinet S 10 S 12 S 12 S 6 S 6 S 6 S 6 S 13 S 5 S 8 S 14 S 14 S...

Страница 15: ...al Main CBA Unit Jack CBA CN3704 CN3702 CN3703 CN3701 CN3901 Junction CBA Function CBA To Speaker To Speaker To LCD Module Assembly CN101B CN102B CN101A CN452 CN401 CN404 CN403 CN402 CN1550 CN1650 CN1...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 20: ...ervice 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 rectif...

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

Страница 22: ...and their periphery circuit and service it if defective PANEL 25 6V is not output FLOW CHART NO 10 Yes No Is approximately 33V voltage supplied to the cathode of D618 Is approximately 33V voltage outp...

Страница 23: ...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 ser...

Страница 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...

Страница 25: ...tted normally Audio input terminals FLOW CHART NO 21 Check the line between Pin 16 18 of CN403 and Pin 4 5 of TU10 and TU10 Tuner Unit and service it if defective Are the DIF signals outputted to Pin...

Страница 26: ...ED1 B16 P ON H2 A12 REMOTE AD11 P ON H1 PROTECT1 P ON H2 P ON H1 AC11 JUNCTION CBA CN102B KEY IN1 6 6 CN102A CN403 CN3703 D16 BACKLIGHT ADJ IC3101 MEMORY SCL SDA AE4 AF3 6 5 IC3802 AUDIO SELECTOR SCL...

Страница 27: ...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 CN403 CN3703 DIF OUT2 16 16 IF AGC 20 20 DIF OUT1 18 18 VIDEO IN RGB VIDEO...

Страница 28: ...R 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 JACK CBA TO DIGITALSIGNAL PROCESS BLOCK DIAGRAM TO DIGITALSIGNAL PROCESS BLOCK DI...

Страница 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...

Страница 30: ...IVE OSC PWM CONTROL LOGIC VCC DTC CURRENT CONTROL SWITCH CURRENT CONTROL SWITCH Q1700 CURRENT CONTROL SWITCH OVER VOLTAGE PROTECTOR OVER VOLTAGE PROTECTOR OVER VOLTAGE PROTECTOR OVER VOLTAGE PROTECTOR...

Страница 31: ...rcuit to fail HOT COLD MAIN CBA HOT CIRCUIT BE CAREFUL Q602 SWITCHING CONTROL 1 4 3 2 IC605 T601 3 LINE FILTER L601 AC601 AC CORD BRIDGE RECTIFIER D602 D604 D605 D607 1 2 16 15 14 13 12 11 10 9 5 6 FE...

Страница 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...

Страница 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...

Страница 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...

Страница 35: ...9 4 A9372SCM2 Main 2 4 Schematic Diagram...

Страница 36: ...9 5 A9372SCM3 Main 3 4 Schematic Diagram...

Страница 37: ...9 6 A9372SCM4 Main 4 4 Schematic Diagram...

Страница 38: ...9 7 A9372SCF Function Junction Schematic Diagram...

Страница 39: ...9 8 A9372SCJ Jack Schematic Diagram...

Страница 40: ...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...

Страница 41: ...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...

Страница 42: ...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...

Страница 43: ...9 12 A9372SCD4 Digital Main 4 7 Schematic Diagram...

Страница 44: ...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...

Страница 45: ...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...

Страница 46: ...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...

Страница 47: ...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...

Страница 48: ...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...

Страница 49: ...9 18 Function CBA Top View Function CBA Bottom View BA9370F01021A Junction CBA Top View Junction CBA Bottom View BA9370F01021...

Страница 50: ...9 19 BA9370F01021B Jack CBA Top View JACK CBA Bottom View...

Страница 51: ...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 52: ...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 53: ...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 GND P ON 3 3V GND P ON 3 3V P ON 3 3V GND AL 3 3V 1 AL 3 3V 1 AL 3 3V 1 GND GND GND 26 AL 5V 27...

Страница 54: ...Function CBA Junction CBA Main CBA Jack CBA Stand Assembly L17 B13 B12 B23 B14 L9 L1 L1 L1 L3 L1 L4 A4 B3 L3 B18 A17 L19 L3 B1 B7 L3 L3 B7 B7 L11 L19 L3 B3 L2 L2 L3 L3 L3 L8 L1 L8 B8 B8 A5 A1 A3 L3 L...

Страница 55: ...12 2 A9372PEX 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 Tape X2 1 X2 2 X2 3 X15 S2 S1...

Страница 56: ...94F0 101 CL801 WIRE ASSEMBLY 2PIN 2PIN 100MM RED GLAY WX1A9370 203 CL802 WIRE ASSEMBLY 2PIN 2PIN 100MM RED GLAY WX1A9370 203 CL3901 WIRE ASSEMBLY 24PIN FFC 24PIN 80MM WX1A9170 101 L1 SCREW P TIGHT 3X1...

Страница 57: ...608 CH J 100pF 50V CHD1JJ3CH101 C420 CHIP CERAMIC CAP 1608 CH J 100pF 50V CHD1JJ3CH101 C422 ELECTROLYTIC CAP 470 F 10V M CE1AMASDL471 C426 CHIP CERAMIC CAP 1608 CH J 33pF 50V CHD1JJ3CH330 C427 CHIP CE...

Страница 58: ...CERAMIC CAP B K 2200pF 500V CCD2JKS0B222 C1503 CERAMIC CAP B K 2200pF 500V CCD2JKS0B222 C1550 CAP CERAMIC HV 15pF 3 15KV SL J CCD3FJASL150 C1551 CAP CERAMIC AX 1500pF 50V B K CA1J152TU061 C1552 CAP CE...

Страница 59: ...HSS4148TE E or QDTZ0HSS4148 Ref No Description Part No DIODE SWITCHING 1N4148 F0021 NDTZ01N4148F D628 DIODE ZENER 5V6BSB T26 NDTB5R6BST26 D629 DIODE ZENER 8V2BSA T26 NDTA8R2BST26 D631 SWITCHING DIODE...

Страница 60: ...f No Description Part No DIODE SWITCHING 1N4148 F0021 NDTZ01N4148F D1558 SWITCHING DIODE 1SS133 T 77 or QDTZ001SS133 DIODE SWITCHING HSS4148TE E or QDTZ0HSS4148 DIODE SWITCHING 1N4148 F0021 NDTZ01N414...

Страница 61: ...SWITCHING HSS4148TE E or QDTZ0HSS4148 DIODE SWITCHING 1N4148 F0021 NDTZ01N4148F ICS IC301 IC TL3472CDR or NSZBA0TTY115 IC MC34072L S08 R QSZBA0TUTC01 IC402 IC SWITCH TC4053BF EL N F or QSZBA0TTS163 R...

Страница 62: ...67P TRANSISTOR KTA 1266 GR AT P or NQS4KTA1266P TRANSISTOR 2SA1015 Y TE2 F T or QQSY2SA1015F Ref No Description Part No TRANSISTOR 2SA1015 GR TE2 F T or QQS12SA1015F PNP TRANSISTOR 2SA1980Y AT or NQSY...

Страница 63: ...C1815 GR TE2 F T or QQS12SC1815F Ref No Description Part No NPN TRANSISTOR 2SC5343Y AT or NQSY02SC5343 NPN TRANSISTOR 2SC5343G AT or NQSG02SC5343 NPN TRANSISTOR 2SC5343MG AT or NQSG2SC5343M NPN TRANSI...

Страница 64: ...10W J 100 or RRXAJR5Z0101 RES CHIP 1608 1 10W J 100 RRXA101YF002 R18 CHIP RES 1 10W J 100 or RRXAJR5Z0101 RES CHIP 1608 1 10W J 100 RRXA101YF002 Ref No Description Part No R21 CHIP RES 1 10W J 390 or...

Страница 65: ...iption Part No R470 CHIP RES 1608 1 10W 0 or RRXAZR5Z0000 RES CHIP 1608 1 10W J 0 RRXA000YF002 R471 RES CARBON FILM T 1 4W J 47k or RCX4473T1001 RES CARBON FILM 1 4W J 47k RCX4473FS002 R475 CHIP RES 1...

Страница 66: ...1 RES CARBON FILM 1 4W J 3 3 RCX43R3FS002 R666 CHIP RES 1 10W F 8 2k or RRXAFR5H8201 Ref No Description Part No CHIP RES 1608 1 10W F 8 2k or RRXAFR5Z8201 RES CHIP 1608 1 10W F 8 20k RTW8201YF002 R667...

Страница 67: ...R5Z0823 RES CHIP 1608 1 10W J 82k RRXA823YF002 Ref No Description Part No R1016 CHIP RES 1 10W J 56k or RRXAJR5Z0563 RES CHIP 1608 1 10W J 56k RRXA563YF002 R1017 CHIP RES 1 10W J 220k or RRXAJR5Z0224...

Страница 68: ...10W J 12k or RRXAJR5Z0123 RES CHIP 1608 1 10W J 12k RRXA123YF002 Ref No Description Part No R1508 METAL OXIDE FILM RES 2W J 0 22 RN02R22ZU001 R1509 RES CARBON FILM T 1 4W J 33k or RCX4333T1001 RES CA...

Страница 69: ...401 JACK HPEP SML PCB S PJ 358H or JXSJ020YUQ01 JACK HPEP SML PCB S 02 MSJ 035 29D ABS JXSJ020LY001 JK402 JACK SW DIN PCB S 04 DIN 417HA 01 or JYEJ040YUQ03 JACK SW DIN PCB S 04 MDC 076H A LF JYEJ040LY...

Страница 70: ...KTC3198P TRANSISTOR 2SC1815 Y TE2 F T or QQSY2SC1815F TRANSISTOR 2SC1815 GR TE2 F T or QQS12SC1815F NPN TRANSISTOR 2SC5343Y AT or NQSY02SC5343 NPN TRANSISTOR 2SC5343G AT or NQSG02SC5343 NPN TRANSISTOR...

Страница 71: ...HIP 1608 1 10W J 0 RRXA000YF002 RS101 SENSOR REMOTE RECEIVER KSM 712TH2E or USESJRSKK044 SENSOR REMOTE RECEIVER KSM 712TH2M USEJRS0KK001 Ref No Description Part No JUNCTION CBA Consists of the followi...

Страница 72: ...LH7 M22BB A9372EP 2009 07 31...

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