LG 32LC7D Series Service Manual Download Page 1

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LCD TV

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

CHASSIS : LD73A

MODEL : 32LC7D

32LC7D-ZA

MODEL :

32LC55

32LC55-ZA

MODEL :

32LC56

32LC56-ZC

website:http://biz.LGservice.com

Summary of Contents for 32LC7D Series

Page 1: ... SERVICE MANUAL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS LD73A MODEL 32LC7D 32LC7D ZA MODEL 32LC55 32LC55 ZA MODEL 32LC56 32LC56 ZC website http biz LGservice com ...

Page 2: ... 2 CONTENTS CONTENTS 2 PRODUCT SAFETY 3 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 9 TROUBLE SHOOTING 14 BLOCK DIAGRAM 22 EXPLODED VIEW 24 REPLACEMENT PARTS LIST 26 SVC SHEET ...

Page 3: ...Current Cold Check Antenna Cold Check With the instrument AC plug removed from AC source connect an electrical jumper across the two AC plug prongs Place the AC switch in the on position connect one lead of ohm meter to the AC plug prongs tied together and touch other ohm meter lead in turn to each exposed metallic parts such as antenna terminals phone jacks etc If the exposed metallic part has a ...

Page 4: ...vely obtain and wear a commercially available discharging wrist strap device which should be removed to prevent potential shock reasons prior to applying power to the unit under test 2 After removing an electrical assembly equipped with ES devices place the assembly on a conductive surface such as aluminum foil to prevent electrostatic charge buildup or exposure of the assembly 3 Use only a ground...

Page 5: ...not shiny reheat them and if necessary apply additional solder Fuse and Conventional Resistor Removal Replacement 1 Clip each fuse or resistor lead at top of the circuit board hollow stake 2 Securely crimp the leads of replacement component around notch at stake top 3 Solder the connections CAUTION Maintain original spacing between the replaced component and adjacent components and the circuit boa...

Page 6: ...ure Size 32 inch 7 Tuning System FVS 100 program PAL 200 PR Option 8 Operating Environment 1 Temp 0 40 deg 2 Humidity 10 90 9 Storage Environment 3 Temp 20 50 deg 4 Humidity 10 90 10 Display LCD Module LPL 2 General Specification No Item Specification Remark 1 Panel 32 TFT WXGA LCD 2 Frequency range H 45 50Khz PC Input V 47 63Hz 3 Power consumption 26inch 4 6 W 32inch 5 54 W 4 LCD Module LPL 32inc...

Page 7: ...minance cd m2 320 400 32 Variation 1 3 MAX MIN 3 Contrast Ratio CR 32 600 800 All White All Black CRD With 32 1200 1600 All White All Black 4 CIE Color Coordinates White Wx Typ 0 285 Typ LPL 26 Wy 0 03 0 293 0 03 Red Xr 0 640 Yr 0 343 Green Xg 0 280 Yg 0 605 Blue Xb 0 145 Yb 0 065 6 RGB PC INPUT Mode Table No Resolution H freq kHz V freq Hz Pixel clock MHz Proposed 1 720X400 31 468 70 08 28 321 2 ...

Page 8: ...60Hz HDCP 11 1920X1080 33 75 60 74 250 HDTV 1080i 60Hz HDCP 12 1920X1080 27 24 74 250 HDTV 1080P 24Hz HDCP 13 1920X1080 56 25 50 00 148 500 HDTV 1080P 50Hz HDCP 14 1920X1080 67 43 59 94 148 352 HDTV 1080P 60Hz HDCP 15 1920X1080 67 50 60 148 500 HDTV 1080P 60Hz HDCP No Resolution H freq kHz V freq Hz Pixel clock MHz Proposed 1 720X400 31 468 70 08 28 321 2 640X480 31 469 59 94 25 17 VESA 37 684 75 ...

Page 9: ...folder c LGIDS files 4 Start LGIDS 3 2 Channel memory method 1 Press TILT key in Adjust remocon Automatic setting 2 Setting up like bottom figure Confirmation Press ADJ Key in the Adjust remote control Select System Control2 by using D E CH key and press A ENTER RS 232 Host Gprobe Baud Rate 115200bps Download Cortez 3 Connect RS232 cable Use the general RS 232C Twisted Serial Cable 4 Operate LGIDS...

Page 10: ...D ZA 37LC4D ZA 37LC7D ZA 42LC4D ZA 42LC7D ZA Nome di modello 1 Hex 2 Hex 1 Hex 2 Hex 26LC4D 90 CF CC BC 26LC7D 8D CC CC BC 32LC4D 93 D2 CC BC 32LC7D 90 CF CC BC 37LC4D 8E CD CC BC 37LC7D 8B CA CC BC 42LC4D 92 D1 CC BC 42LC7D 8F CE CC BC 0x000x010x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B0x0C0x0D 0x0E 0x0F 0x00 0 FF FF FF FF FF FF 0 1E 6D 0x01 1 3 80 46 27 78 EA D9 B0 A3 57 49 9C 25 0x02 11 4...

Page 11: ...the Video Signal 7 Color Bar signal into AV3 2 Set the PSM to Dynamic mode in the Picture menu 3 Press IN START key on R C for adjustment 4 Press the G Vol key to operate the set then it becomes automatically 5 Auto RGB OK means the adjustment is completed 6 2 Adjustment of Component 1 Required Equipments Remote controller for adjustment MSPG 925FS Pattern Generator Which has 720p 60Hz YPbPr outpu...

Page 12: ...10cm distance keep it with the surface of the Module and Color Analyzer s Prove vertically 80 100 3 Aging time After aging start keep the power on no suspension of power supply and heat run over 15 minutes Using no signal or full white pattern or the others check the back light on 7 1 Manual white Balance One of R Gain G Gain B Gain should be kept on 80 and others are controlled lowering from 80 1...

Page 13: ...in the Adjust remocon 2 Select System Control 2 by using D E CH key and press A ENTER 3 Using Adjust remocon RS 232 Host Baud Rate Download value change RS 232 Host Gprobe Baud Rate 115200bps Download Cortez 2 Bar code scanning 1 Push the menu button in DTV mode Select the STATION Diagnostics To set 2 Check the Serial Number 13 ...

Page 14: ...es the high tension output appear Does the VSC signal Vs ON appear No No Does the high tension output voltage occur When removing the Y B D Module input connector does output voltage drop When the Y Z B D Module input connector does Power Board high tension output voltage drop No No No 9 Check the Power Board Output high tension circuit Yes 10 Check the Z B D Module output circuit Yes When removin...

Page 15: ...and Power Board Cable connected Connect the Cable Yes No Is the appropriate Fuse F101 on the Power Board Replace the Fuse Yes No Is the Power Board and 13P of VSC Board Cable connected Connect the Cable Yes No After removing the cables connect them to the Power Board except the SC101 connection cable and change the AC voltage marking to manual When ST BY 5V does not operate replace the Power Board...

Page 16: ... B D Is the appropriate Fuse FS101 FS102 on the Y B D normal Replace if open Yes No Yes Yes Replace the Z Board Is the Z Board normal Is the output voltage normal after removing P1 connector of Z B D Is the appropriate Fuse FS1 FS2 on Z B D replace if open Yes No Yes Is the X Board normal Is the output voltage normal after removing P1 2 3 4 5 connectors of the X B D If the output voltage is normal...

Page 17: ...Reconnect the LVDS cable in P800 No Is the IC700 FLI8548 Output normal Replace the VSC No NO Replace the Power board Is the Low High output voltage normal except for stand by 5V NO 4 No Raster 1 Symptom 1 No OSD and image occur at screen 2 It maintains the condition where the front LED is green 2 Procedure check ...

Page 18: ...ntinuously accomplished from the module 2 Procedure check Is the LVDS cable normal Is the VSC Board normal Is the LVDS cable connected Re insert the Cable Yes No No Yes Does the FIL8548 IC IC700 operate Replace the FIL8548 IC IC700 No Is the Ctrl Board of Module normal Replace the Ctrl B D No No Yes Replace the VSC B D Replace the cable Yes ...

Page 19: ...isplay in side S video AV mode Is the Tuner normal Is the CXA2069Q normal Is the Tuner Cable connected Re insert the cable Yes No No Yes Is the FIL8548 normal Replace the Tuner No Are the Input voltage IIC Communication and CVBS output normal Yes Are the Input voltage IIC Communication and HV sync normal No Replace the IC No Are the input voltage IIC Communication and HV sync normal No Block A Rep...

Page 20: ...e R G B input and H V Sync of the J1100 normal Check the input source No Is the HDMI002 IC1004 normal Yes Same as Block A Are Input voltage IIC Communication and HV sync normal No Is the Video input of the A V Jack J1200 normal Yes Same as Block A Check the input source No Replace the IC No Is the Video input of the A V Jack J1201 normal Yes Same as Block A Check the input source No Yes Same as Bl...

Page 21: ...xcept HDMI DTV RF Check the signal before CAX2069 refer to circuit diagram No YES YES Is there no sound only for RF Check the Tuner IN OUT No YES YES Is there no sound only for AV component PC input Is the output of CXA2069 normal No YES Is theIC1300 operating normally Replace the IC1300 MSP4450 No Is the IC1301 operates normally Replace the IC1300 STA335BW No YES Replace the VSC B D YES No Replac...

Page 22: ... 22 BLOCK DIAGRAM Synthesis ...

Page 23: ...MEMO 23 ...

Page 24: ... 24 430 600 301 300 200 590 120 530 201 580 520 400 521 203 204 205 202 206 591 EXPLODED VIEW ...

Page 25: ...DIRECT Hole C SKD 301 ABA33223901 Bracket Assembly GRILLE 32LC7 LP78A 400 ACQ32467621 Cover Assembly Rear 32LC55 7D ZA LD73A PHANTOM 32 EUROPASS3 BACK COVER 430 AAN31752703 Base Assembly STAND 32LC4 TOOL LA64F STAND ASSY C SKD AAN31752704 Base Assembly STAND 32LC4 TOOL LA64F STAND ASSY C SKD H C 520 EBR37029503 PCB Assembly Main MAIN1 T T LD73A 32LC4D ZA SEUVLJG Separation Tuner MAIN TOTAL 521 MJH...

Page 26: ... 0CK104CF56A 0603B104K160CT 100nF 10 16V X7R 55TO 125C C118 0CE106WFKDC MVK4 0TP16VC10M 10uF 20 16V 16MA 40TO 105 C119 0CK104CF56A 0603B104K160CT 100nF 10 16V X7R 55TO 125C C120 0CK104CF56A 0603B104K160CT 100nF 10 16V X7R 55TO 125C C1204 0CC221CK41A C1608C0G1H221JT 220pF 5 50V C0G 55TO 125C C1205 0CK103CK56A 0603B103K500CT 10nF 10 50V X7R 55TO 125C C1206 0CK102CK56A 0603B102K500CT 1nF 10 50V X7R 5...

Page 27: ...40TO 85C NO C1373 0CK104CK56A 0603B104K500CT 100nF 10 50V X7R 55TO 125C C138 0CK104CF56A 0603B104K160CT 100nF 10 16V X7R 55TO 125C C139 0CK104CF56A 0603B104K160CT 100nF 10 16V X7R 55TO 125C C140 0CK104CF56A 0603B104K160CT 100nF 10 16V X7R 55TO 125C C1400 0CE475WK6DC MVK5 0TP50VC4 7M 4 7uF 20 50V 19MA 40TO 1 C1401 0CE475WK6DC MVK5 0TP50VC4 7M 4 7uF 20 50V 19MA 40TO 1 C1402 0CK682CK51A C1608Y5P1H682...

Page 28: ... 125C C202 0CC101CK41A C1608C0G1H101JT 100pF 5 50V C0G 55TO 125C C203 0CK104CF56A 0603B104K160CT 100nF 10 16V X7R 55TO 125C C204 0CK103CK56A 0603B103K500CT 10nF 10 50V X7R 55TO 125C C206 0CK104CF56A 0603B104K160CT 100nF 10 16V X7R 55TO 125C C207 0CK104CF56A 0603B104K160CT 100nF 10 16V X7R 55TO 125C C209 EAE32755801 CL31A106K5HNNNE 10uF 10 16V X5R 55TO 85C C212 EAE32755801 CL31A106K5HNNNE 10uF 10 1...

Page 29: ... C635 0CK472CK56A 0603B472K500CT 4 7nF 10 50V X7R 55TO 125C C636 0CK103CK56A 0603B103K500CT 10nF 10 50V X7R 55TO 125C C637 0CK472CK56A 0603B472K500CT 4 7nF 10 50V X7R 55TO 125C C638 0CE107WF6DC MVK6 3TP16VC100M 100uF 20 16V 80MA 40TO 1 C639 0CE107WF6DC MVK6 3TP16VC100M 100uF 20 16V 80MA 40TO 1 C640 0CE107WF6DC MVK6 3TP16VC100M 100uF 20 16V 80MA 40TO 1 C641 0CC470CK41A C1608C0G1H470JT 47pF 5 50V C0...

Page 30: ... 55TO 125C C807 0CK103CK56A 0603B103K500CT 10nF 10 50V X7R 55TO 125C C810 0CK103CK56A 0603B103K500CT 10nF 10 50V X7R 55TO 125C C812 0CK103CK56A 0603B103K500CT 10nF 10 50V X7R 55TO 125C C813 0CK104CK56A 0603B104K500CT 100nF 10 50V X7R 55TO 125C C814 0CK104CK56A 0603B104K500CT 100nF 10 50V X7R 55TO 125C C815 0CK104CK56A 0603B104K500CT 100nF 10 50V X7R 55TO 125C C817 0CK103CK56A 0603B103K500CT 10nF 1...

Page 31: ...1 CDS3C30GTH 30V 50V 120V 1 9A 1W SOD123 R TP ZD1105 EAH33945901 CDS3C30GTH 30V 50V 120V 1 9A 1W SOD123 R TP ZD1106 EAH33945901 CDS3C30GTH 30V 50V 120V 1 9A 1W SOD123 R TP ZD1107 EAH33945901 CDS3C30GTH 30V 50V 120V 1 9A 1W SOD123 R TP ZD1108 EAH33945901 CDS3C30GTH 30V 50V 120V 1 9A 1W SOD123 R TP ZD1109 EAH33945901 CDS3C30GTH 30V 50V 120V 1 9A 1W SOD123 R TP ZD1112 EAH33945901 CDS3C30GTH 30V 50V 1...

Page 32: ...C3875S ALY NPN 5V 60V 50V 150MA 100NA 70 Q901 0TR387500AA 2SC3875S ALY NPN 5V 60V 50V 150MA 100NA 70 Q902 0TR387500AA 2SC3875S ALY NPN 5V 60V 50V 150MA 100NA 70 Q903 0TR387500AA 2SC3875S ALY NPN 5V 60V 50V 150MA 100NA 70 Q904 0TR387500AA 2SC3875S ALY NPN 5V 60V 50V 150MA 100NA 70 Q905 0TR387500AA 2SC3875S ALY NPN 5V 60V 50V 150MA 100NA 70 AR100 0RJ0472C687 RCA86TRJ47R0 47OHM 5 1 16W 4 SMD R TP 8P ...

Page 33: ...3D677 MCR03EZPJ224 220KOHM 5 1 10W 1608 R TP RO R1117 0RJ0752D677 MCR03EZPJ750 75OHM 5 1 10W 1608 R TP ROHM R1118 0RJ1001D677 MCR03EZPJ102 1KOHM 5 1 10W 1608 R TP ROHM R1119 0RJ1001D677 MCR03EZPJ102 1KOHM 5 1 10W 1608 R TP ROHM R112 0RH0000D622 MCR10EZHJ000 0OHM 5 1 8W 2012 R TP ROHM R112 0RJ1002D677 MCR03EZPJ103 10KOHM 5 1 10W 1608 R TP ROH R1120 0RJ4701D677 MCR03EZPJ472 4 7KOHM 5 1 10W 1608 R TP...

Page 34: ... TP ROHM R1285 0RH0000D622 MCR10EZHJ000 0OHM 5 1 8W 2012 R TP ROHM R1286 0RH0000D622 MCR10EZHJ000 0OHM 5 1 8W 2012 R TP ROHM R1287 0RH0000D622 MCR10EZHJ000 0OHM 5 1 8W 2012 R TP ROHM R1288 0RH0000D622 MCR10EZHJ000 0OHM 5 1 8W 2012 R TP ROHM R1289 0RH0000D622 MCR10EZHJ000 0OHM 5 1 8W 2012 R TP ROHM R129 0RJ0472D677 MCR03EZPJ470 47OHM 5 1 10W 1608 R TP ROHM R1290 0RH0000D622 MCR10EZHJ000 0OHM 5 1 8W...

Page 35: ...8 R TP ROH R1453 0RJ4703D677 MCR03EZPJ474 470KOHM 5 1 10W 1608 R TP RO R1454 0RJ4703D677 MCR03EZPJ474 470KOHM 5 1 10W 1608 R TP RO R1455 0RJ4701D677 MCR03EZPJ472 4 7KOHM 5 1 10W 1608 R TP RO R1456 0RJ1501D677 MCR03EZPJ152 1 5KOHM 5 1 10W 1608 R TP RO R146 0RJ2701D677 MCR03EZPJ272 2 7KOHM 5 1 10W 1608 R TP RO R1460 0RJ1000C678 MCR01MZPJ101 100OHM 5 1 16W 1005 R TP ROH R1461 0RJ1000C678 MCR01MZPJ101...

Page 36: ...M 5 1 16W 1005 R TP RO R180 0RJ0472C678 MCR01MZPJ470 47OHM 5 1 16W 1005 R TP RO R183 0RJ3300D677 MCR03EZPJ331 330OHM 5 1 10W 1608 R TP ROH R184 0RJ3300D677 MCR03EZPJ331 330OHM 5 1 10W 1608 R TP ROH R185 0RJ0472C678 MCR01MZPJ470 47OHM 5 1 16W 1005 R TP RO R186 0RJ0472C678 MCR01MZPJ470 47OHM 5 1 16W 1005 R TP RO R187 0RJ0472C678 MCR01MZPJ470 47OHM 5 1 16W 1005 R TP RO R188 0RJ0472D677 MCR03EZPJ470 4...

Page 37: ...R TP R522 0RJ9311D477 MCR03EZPF9311 9 31KOHM 1 1 10W 1608 R TP R523 0RJ1001D677 MCR03EZPJ102 1KOHM 5 1 10W 1608 R TP ROHM R524 0RJ0000D677 MCR03EZPJ000 0OHM 5 1 10W 1608 R TP ROHM R526 0RJ2001D677 MCR03EZPJ202 2KOHM 5 1 10W 1608 R TP ROHM R527 0RJ2001D677 MCR03EZPJ202 2KOHM 5 1 10W 1608 R TP ROHM R528 0RJ0000D677 MCR03EZPJ000 0OHM 5 1 10W 1608 R TP ROHM R531 0RJ0000D677 MCR03EZPJ000 0OHM 5 1 10W 1...

Page 38: ...CR03EZPJ560 56OHM 5 1 10W 1608 R TP ROHM R734 0RJ1000C678 MCR01MZPJ101 100OHM 5 1 16W 1005 R TP ROH R735 0RJ1002D677 MCR03EZPJ103 10KOHM 5 1 10W 1608 R TP ROH R737 0RJ4701D677 MCR03EZPJ472 4 7KOHM 5 1 10W 1608 R TP RO R739 0RJ1000C678 MCR01MZPJ101 100OHM 5 1 16W 1005 R TP ROH R740 0RJ0222D677 MCR03EZPJ220 22OHM 5 1 10W 1608 R TP ROHM R741 0RJ1000C678 MCR01MZPJ101 100OHM 5 1 16W 1005 R TP ROH R743 ...

Page 39: ... 501JT 500OHM L103 6210TCE001G Filter Bead HH 1M3216 501JT 500OHM L104 6210TCE001G Filter Bead HH 1M3216 501JT 500OHM L105 6210TCE001G Filter Bead HH 1M3216 501JT 500OHM L106 6210TCE001G Filter Bead HH 1M3216 501JT 500OHM L108 6210TCE001G Filter Bead HH 1M3216 501JT 500OHM L109 0LC1032101A Inductor Multilayer Chip FI C3216 103KJT 10UH L1101 6210TCE001L Filter Bead HB 1T2012 102JT 1000OHM L1102 621...

Page 40: ...3P 13P 2 50MM 1R STRAIGHT DIP ST NA P901 6602T25008J SMW250 10P 10P 2 50MM 1R ANGLE DIP BK BLACK 6630V90142A TPH254 R 1419 6A 6P 2 54MM 2R ANGLE DIP BK 6631900012C SMH250 SMH250 200mM 2 50MM 10P UL1007 AWG24 6631900018K 3P 2 5MM SMH250 TERMINAL 600mM 2 50MM 3P U 6631900019R 4p spk right SMH250 TERMINAL 35097 9802 1 6631900027C SMH250 SMH250 200mM 2 50MM 13P UL1007 AWG24 6631T20033E SMH200 14P SMH2...

Page 41: ...P No EBY36717302 1 4 2007 01 26 ...

Page 42: ...P No EBY36717302 2 4 2007 01 26 ...

Page 43: ...P No EBY36717302 3 4 2007 01 26 ...

Page 44: ...Mar 2007 Printed in Korea P NO MFL36695308 ...

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