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50

LC-20A2E

Ref. No.

Part No.

★

Description

Code

Ref. No.

Part No.

★

Description

Code

DUNTKA431DE01

MAIN PWB UNIT(Continued)

MISCELLANEOUS PARTS

P2002

QPLGN1320REZZ

J Plug, 13Pin

AC

P2003

QPLGN1320REZZ

J Plug, 13Pin

AC

P3601

QPLGN0378GEZZ

J Plug, 3Pin

AB

P3602

QPLGN0378GEZZ

J Plug, 3Pin

AB

P3603

QPLGN0278GEZZ

J Plug, 2Pin

AA

P3604

QPLGN0278GEZZ

J Plug, 2Pin

AA

SC402

QSOCN0493FJZZ

J Socket, 45Pin

AG

SC801

QSOCN0224FJZZ

J Socket, 20Pin

AE

SC1201 QSOCN0461FJZZ

J Socket, 53Pin

AH

SC1202 QSOCN0206FJZZ

J Socket, 30Pin

AF

SC2001 QSOCN0464FJZZ

J Socket, 50Pin

AH

DUNTKA432DE01

SUB PWB UNIT

INTEGRATED CIRCUITS

IC201

VHiNJM2147M-1

J NJM2147M

AF

IC303

VHiNJM2283F-1

J NJM2283F

AF

IC304

VHi-1

J

AE

IC702

VHiNJM2377M-1

J NJM2377M

AK

IC901

RH-iX3371CEZZ

J IX3371CE

BD

IC902

VHiNJM4560M-1

J NJM4560M

AG

IC903

VHiNJM4560M-1

J NJM4560M

AG

IC2004

VHiBR24C08F-1

J BR24C08F

AF

IC3305

VHi-1S

J

AM

TRANSISTORS

Q201

VS2SC2712Y/-1

J 2SC2712Y

AB

Q202

VS2SC2712Y/-1

J 2SC2712Y

AB

Q203

VSFMY3/////-1

J FMY3

AB

Q204

VS2SC2712Y/-1

J 2SC2712Y

AB

Q301

VSDTC314TK/-1

J DTC314TK

AC

Q702

VS2SK2503//-1

J 2SK2503

AE

Q703

VS2SC2712Y/-1

J 2SC2712Y

AB

Q3304

VSDTC314TK/-1

J DTC314TK

AC

Q3305

VSDTC314TK/-1

J DTC314TK

AC

Q3306

VS2SC2712Y/-1

J 2SC2712Y

AB

Q3307

VSDTC314TK/-1

J DTC314TK

AC

Q3308

VSDTC314TK/-1

J DTC314TK

AC

DIODES

D201

VHDDAN222//-1

J DAN222

AA

D702

VHDSFPB56//2E

J SFPB56

AC

D703

VHD1SS250//1E

J 1SS250

AB

D704

VHD1SS250//1E

J 1SS250

AB

D705

VHDDAN222//-1

J DAN222

AA

D706

VHDSFPB74//2E

J SFPB74

AD

D707

VHDDAN222//-1

J DAN222

AA

D709

VHDDAN222//-1

J DAN222

AA

D3301

VHDDAN222//-1

J DAN222

AA

D3302

RH-EX1396CEZZ

J Zener Diode, 6.8V

AB

PACKAGED CIRCUIT

X901

RCRSB0250GEZZ

J Crystal, CRSB0250GE

AG

COILS

L701

RCiLC0130CEZZ

J Coil, CiLC0130CE

AG

L705

RCiLC0057CEZZ

J Coil, CiLC0057CE

AD

L706

RCiLC0130CEZZ

J Coil, CiLC0130CE

AG

L901

VP-1M4R7J1R2N

J Peaking, 4.7

µ

H

AB

L902

VP-1M101J7R7N

J Peaking, 100

µ

H

AC

TRANSFORMER

å

T701

RTRNZ0778CEZZ

J Transformer

AM

CAPACITORS

C201

VCKYTV1HF104Z

J 0.1

50V Ceramic

AA

C202

VCKYCY1EF104Z

J 0.1

25V Ceramic

AA

C203

RC-KZ1025CEZZ

J 1

10V Ceramic

AB

C204

RC-KZ1025CEZZ

J 1

10V Ceramic

AB

C205

VCKYCY1EF104Z

J 0.1

25V Ceramic

AA

C206

VCKYCY1HF103Z

J 0.01

50V Ceramic

AA

C334

VCKYTV1CF105Z

J 1

16V Ceramic

AB

C335

VCKYCY1HB682K

J 6800p 50V Ceramic

AA

C336

VCKYCY1HB682K

J 6800p 50V Ceramic

AA

C337

VCKYTV1CF105Z

J 1

16V Ceramic

AB

C338

VCKYTV1CF105Z

J 1

16V Ceramic

AB

C339

VCEAPF0JW476M J 47

6.3V Electrolytic

AB

C340

RC-KZ1025CEZZ

J 1

10V Ceramic

AB

C701

VCCCCY1HH471J

J 470p 50V Ceramic

AA

C706

VCKYCY1HB562K

J 5600p 50V Ceramic

AA

C710

VCKYTV1CF105Z

J 1

16V Ceramic

AB

C711

VCKYCY1EB103K

J 0.01

25V Ceramic

AA

C712

VCEAPT1CN226M J 22

16V Electrolytic

AC

C713

RC-EZ1176CEZZ

J 100

16V Electrolytic

AK

C716

VCKYTV1CF105Z

J 1

16V Ceramic

AB

C719

RC-EZ0420CEZZ

J 100

25V Electrolytic

AE

C721

VCEASD1HN336M J 33

50V Electrolytic

AD

C722

VCKYTV1HF104Z

J 0.1

50V Ceramic

AA

C728

VCKYTV1HF104Z

J 0.1

50V Ceramic

AA

C729

VCKYTV1CF105Z

J 1

16V Ceramic

AB

C731

VCCCCY1HH181J

J 180p 50V Ceramic

AA

C733

RC-EZ0538CEZZ

J 330

16V Electrolytic

AE

C734

VCKYTV1CF105Z

J 1

16V Ceramic

AB

C735

RC-EZ0416CEZZ

J 330

6.3V Electrolytic

AD

C736

RC-EZ0416CEZZ

J 330

6.3V Electrolytic

AD

C737

RC-EZ1339CEZZ

J 220

16V Electrolytic

AD

C738

RC-KZ1025CEZZ

J 1

10V Ceramic

AB

C740

VCEAPF1EN475M

J 4.7

25V Electrolytic

AC

C741

VCKYTV1CF105Z

J 1

16V Ceramic

AB

C747

VCKYTV1HB562K

J 5600p 50V Ceramic

AA

C748

RC-EZ1339CEZZ

J 220

16V Electrolytic

AD

C749

RC-EZ1177CEZZ

J 150

6.3V Electrolytic

AH

C902

VCKYCY1EF104Z

J 0.1

25V Ceramic

AA

C905

VCEAPF1CW106M J 10

16V Electrolytic

AB

C906

VCEAPF1CW106M J 10

16V Electrolytic

AB

C909

VCKYCY1HB682K

J 6800p 50V Ceramic

AA

C910

VCKYCY1HB682K

J 6800p 50V Ceramic

AA

C911

VCEAPF1CW106M J 10

16V Electrolytic

AB

C912

VCEAPF1CW106M J 10

16V Electrolytic

AB

C913

VCKYCY1EF104Z

J 0.1

25V Ceramic

AA

C914

RC-EZ0417CEZZ

J 150

16V Electrolytic

AD

C915

VCEAPF0JW336M J 33

6.3V Electrolytic

AB

C916

VCKYCY1EF104Z

J 0.1

25V Ceramic

AA

C919

RC-KZ1025CEZZ

J 1

10V Ceramic

AB

C920

RC-KZ1025CEZZ

J 1

10V Ceramic

AB

C921

RC-KZ1025CEZZ

J 1

10V Ceramic

AB

C922

RC-KZ1025CEZZ

J 1

10V Ceramic

AB

C923

VCKYCY1EF104Z

J 0.1

25V Ceramic

AA

C924

VCEAPF1CW106M J 10

16V Electrolytic

AB

C925

RC-KZ1025CEZZ

J 1

10V Ceramic

AB

C927

VCCCCY1HH560J

J 56p

50V Ceramic

AA

C928

VCCCCY1HH560J

J 56p

50V Ceramic

AA

C929

VCCCCY1HH560J

J 56p

50V Ceramic

AA

C930

VCCCCY1HH5R0C J 5p

50V Ceramic

AA

C931

VCCCCY1HH5R0C J 5p

50V Ceramic

AA

C932

VCKYCY1EF104Z

J 0.1

25V Ceramic

AA

C933

RC-EZ0417CEZZ

J 150

16V Electrolytic

AD

C935

VCEAPF1CW226M J 22

16V Electrolytic

AB

C937

RC-EZ0417CEZZ

J 150

16V Electrolytic

AD

C938

RC-EZ0417CEZZ

J 150

16V Electrolytic

AD

C939

VCKYCY1HB561K

J 560p 50V Ceramic

AA

C940

VCKYCY1HB152K

J 1500p 50V Ceramic

AA

C941

VCKYCY1HB152K

J 1500p 50V Ceramic

AA

C942

VCKYCY1HB561K

J 560p 50V Ceramic

AA

C943

VCKYCY1EF104Z

J 0.1

25V Ceramic

AA

C944

VCEAPF1CW106M J 10

16V Electrolytic

AB

C945

VCEAPF1HW225M J 2.2

50V Electrolytic

AB

C946

VCEAPF1HW225M J 2.2

50V Electrolytic

AB

C954

VCEAPF1CW106M J 10

16V Electrolytic

AB

C955

VCKYTV1CF105Z

J 1

16V Ceramic

AB

C956

VCKYTV1CF105Z

J 1

16V Ceramic

AB

C957

VCEAPF1EW475M J 4.7

25V Electrolytic

AB

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Summary of Contents for LC-20A2E

Page 1: ...L 4 OUTLINE DIMENSION FIGURE 5 REMOVING OF MAJOR PARTS 6 ADJUSTING PROCEDURE OF EACH SECTION 9 TROUBLE SHOOTING TABLE 11 CHASSIS LAYOUT 17 BLOCK DIAGRAMS 20 DESCRIPTION OF SCHEMATIC DIAGRAM 24 SCHEMATIC DIAGRAMS 25 PRINTED WIRING BOARD ASSEMBLIES 42 PARTS LIST Ë ELECTRICAL PARTS 47 MAIN UNIT 47 SUB UNIT 50 INVERTER UNIT 52 SWITCH UNIT 52 Ë SUPPLIED ACCESSORIES PARTS 53 Ë PACKING PARTS 53 Ë CABINET...

Page 2: ...s mode 4 Entering the TUNER side adjustment process MENU key on the main body Tuning UP key remote control Select the position shown in the figure below and press the M key remote control within 1 second Enters the adjustment process 3 Adjustment MAIN side adjustment Press the M key to move the cursor and press the volume UP DOWN key to make an adjustment Power supply voltage adjustment B 5V Model...

Page 3: ...ss B ADJ Adjust the voltage of the pin 12 of SC901 the SUB PWB to 5 0V 0 05V 3 2 Model setting Page 9 of MAIN side adjustment process MODEL Set to A2E 3 3 Inch size setting Page 9 of MAIN side adjustment process INCH SIZE Set to 20 3 4 COMMON BIAS adjustment of LCD module Page 9 of MAIN side adjustment process COM BIAS Input the picture of gray scale and adjust it so as to obtain the best contrast...

Page 4: ...and F4 Check S4701 and connection cable Is T701 s primary oscillator waveform normal Check T701 s secondary load Yes Yes No No No No Yes Fluorecent lamp failure to light up Does F1 function Is the pin 34 of IC1201 in the H state Is the Q3603 short circuiting Is there short circuiting of T7751 7756 primary side periphery Q7751 Q7755 Yes Yes No No No Yes Replace the fluorecent lamp with new one and ...

Page 5: ... Yes No No No TV and VIDEO 1 output Is voltages at pin 3 of W7 and pins 3 4 5 of W14 tuner normal Is output at pin 2 of W7 tuner normal Check the power line Check tuner and its peripheral parts Is input at pin 3 of IC402 normal Is the pins 2 and 4 of IC402 at H and L state Yes Yes No No No No No Yes No TV output Is the pins 65 and 66 of IC2001 at H and L state Yes Check the its line Check the its ...

Page 6: ... of IC801 normal No No S VIDEO output Is input at pin 70 of IC801 normal Check the V2VO line and their peripheral parts No No line output Is input at pins 1 2 3 56 57 and 79 of IC801 normal Is output at pins 11 13 and 16 of I4 normal Check IC801 and their peripheral parts Check I13 and their peripheral parts Check I9 and their peripheral parts Check I4 and their peripheral parts Is output at pins ...

Page 7: ...HS being outputted Is source clock CK normal Check 3 3V outputs line of IC752 Check R1210 R1211 and their peripheral parts Check FB1203 and gate aray peripheral parts Is output of LBR and HG normal Yes Yes No No No Vertical line output No picture Check all the settings microprocessor s adjust process menu Is output of R0 R5 normal Is output of G0 G5 normal Is output of B0 B5 normal Check R1202 R12...

Page 8: ... 42 and 43 of SC402 normal Yes Is output at pins 6 and 7 of P4004 normal Yes Muting effect is on Check the FSMUTE line Check IC901 and their peripheral parts Check IC304 and their peripheral parts Check SC402 SC901 and their peripheral parts and connection Check P4004 and their peripheral parts and connection cable Yes Check the J4001 line No sound from headphone Is output at pins 36 and 37 of IC9...

Page 9: ...TROL RECEIVER RESET IC2002 CS E 2 PROM IC2004 I 2 C I 2 C I 2 C I 2 C MICON IC2001 MP_CLK MPDA DAC1CS CONTROL SIGNAL LLC1 LLC2 FIELD VSY HSY UV0 UV7 VP_Y0 VP_Y7 DACM_L R DACA_L R MSP IC901 VPC IC801 HSY ANALOG SWITCH IC2007 HSY2 HD CSYNC 5V 31V 14V 8V 38V 16V 9V 5V 8V 3 3V 3 3V REG IC752 IC201 Q204 Q202 Q203 5V REG IC751 DC DC T701 PWM IC702 INV DC 13V PA DC 13V PA VCC INV VCC SIG VCC DC 13V OSD I...

Page 10: ... OUT V IN2 VPC DY SC1 IN L R MSP V OUT VPC SC1 OUT L R MSP V IN3 VPC SC2 IN L R MSP V IN2 VPC AN IN1 MSP SC2 OUT L R MSP DACA_L R W9 I 2 C I 2 C I 2 C OSD W1 DC 13V W13 ANALOG SWITCH I4 MICON I9 ANALOG SWITCH I13 R_OSD G_OSD B_OSD H V HEAD PHONE AMP Q18 Q23 TUNER W7 W14 HEAD PHONE SOUND L R SOUND L R RF AV1 SOUND L R AV1 PICTURE R_SCART G_SCART B_SCART AV1 SOUND OUTPUT L R AV1 PICTURE OUTPUT SCL S...

Page 11: ...25 LC 20A2E Ë INVERTER Unit A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 SCHEMATIC DIAGRAMS å AND SHADED COMPONENTS SAFETY RELATED PARTS ...

Page 12: ...1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 A B C D E F G H I J LC 20A2E LC 20A2E Ë MAIN Unit 1 4 26 27 ...

Page 13: ...1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 A B C D E F G H I J LC 20A2E LC 20A2E Ë MAIN Unit 2 4 28 29 ...

Page 14: ...1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 A B C D E F G H I J LC 20A2E LC 20A2E Ë MAIN Unit 3 4 30 31 ...

Page 15: ...1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 A B C D E F G H I J LC 20A2E LC 20A2E Ë MAIN Unit 4 4 32 33 ...

Page 16: ...1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 A B C D E F G H I J LC 20A2E LC 20A2E Ë SUB Unit 1 2 34 35 ...

Page 17: ...1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 A B C D E F G H I J LC 20A2E LC 20A2E å AND SHADED COMPONENTS SAFETY RELATED PARTS Ë SUB Unit 2 2 36 37 ...

Page 18: ...1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 A B C D E F G H I J LC 20A2E LC 20A2E Ë SWITCH Unit 38 39 ...

Page 19: ...1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 A B C D E F G H I J LC 20A2E LC 20A2E å AND SHADED COMPONENTS SAFETY RELATED PARTS Ë TUNER Unit 40 41 ...

Page 20: ... IC1109 VHiNJM353M 1 J NJM353M AG IC1110 VHiBU4053V 1 J BU4053V AE IC1201 RH iX3378CEZZ J IX3378CE AY IC1202 VHiPD485505 2 J PD485505 AY IC1203 VHiTC4W53U 1 J TC4W53U AF IC1204 VHiTC4024BF 1 J TC4024BF AG IC1205 VHiTC4052BF 1 J TC4052BF AE IC2001 RH iX3483CEZZ J IX3483CE BA IC2002 VHiPST529DM 1 J PST529DM AE IC2006 VHiTC7W04U 1 J TC7W04U AD IC2007 VHiTC4W53U 1 J TC4W53U AF TRANSISTORS Q401 VS2SC27...

Page 21: ... AA R775 VRS CY1JF000J J 0 1 16W Metal Oxide AA R776 VRS CY1JF1R0J J 1 1 16W Metal Oxide AA R777 VRS CY1JF102J J 1k 1 16W Metal Oxide AA R787 VRS CY1JF472J J 4 7k 1 16W Metal Oxide AA R788 VRS TW2ED102J J 1k 1 4W Metal Oxide AA R789 VRS CY1JF102J J 1k 1 16W Metal Oxide AA DUNTKA431DE01 MAIN PWB UNIT Continued L1204 VP 1M220J2R9N J Peaking 22µH AC L1205 VP 1M220J2R9N J Peaking 22µH AC CAPACITORS C4...

Page 22: ...LN 0090CE AD FB1201 RBLN 0090CEZZ J Balun BLN 0090CE AD FB1203 RBLN 0076TAZZ J Balun BLN 0076TA AC DUNTKA431DE01 MAIN PWB UNIT Continued R790 VRS CY1JF102J J 1k 1 16W Metal Oxide AA R791 VRS CY1JF000J J 0 1 16W Metal Oxide AA R801 VRS CB1JF221J J 220 1 16W Metal Oxide AC R802 VRS CB1JF220J J 22 1 16W Metal Oxide AC R803 VRS CB1JF220J J 22 1 16W Metal Oxide AC R804 VRS CA1JF101J J 100 1 16W Metal O...

Page 23: ... J 470p 50V Ceramic AA C706 VCKYCY1HB562K J 5600p 50V Ceramic AA C710 VCKYTV1CF105Z J 1 16V Ceramic AB C711 VCKYCY1EB103K J 0 01 25V Ceramic AA C712 VCEAPT1CN226M J 22 16V Electrolytic AC C713 RC EZ1176CEZZ J 100 16V Electrolytic AK C716 VCKYTV1CF105Z J 1 16V Ceramic AB C719 RC EZ0420CEZZ J 100 25V Electrolytic AE C721 VCEASD1HN336M J 33 50V Electrolytic AD C722 VCKYTV1HF104Z J 0 1 50V Ceramic AA ...

Page 24: ... CY1JF682J J 6 8k 1 16W Metal Oxide AA R724 VRS TQ2BD000J J 0 1 8W Metal Oxide AA R729 VRS TQ2BD000J J 0 1 8W Metal Oxide AA R731 VRS TQ2BD000J J 0 1 8W Metal Oxide AA R732 VRS TW2ED222J J 2 2k 1 4W Metal Oxide AA R733 VRS TQ2BD683J J 68k 1 8W Metal Oxide AA R734 VRS CY1JF393J J 39k 1 16W Metal Oxide AA R735 VRS CY1JF223J J 22k 1 16W Metal Oxide AA R736 VRS CY1JF1R0J J 1 1 16W Metal Oxide AA R741 ...

Page 25: ...Q4006 VS2SC2712Y 1 J 2SC2712Y AB Q4007 VS2SC2712Y 1 J 2SC2712Y AB Q4008 VSUPA606T 1 J UPA606T AD DIODES AND LED S D4005 VHDMA3120WA 1 J MA3120WA AK D4006 VHDMA3120WA 1 J MA3120WA AK D4008 RH EX0891CEZZ J Zener Diode AC D4009 RH EX0879CEZZ J Zener Diode AD D4010 RH EX0879CEZZ J Zener Diode AD D4012 RH EX0879CEZZ J Zener Diode AD D4013 RH PX0421CEZZ J PhotoDiode AD D4014 RH PX0421CEZZ J PhotoDiode A...

Page 26: ...Model Label AF 2 16 TLABN0304CEZZ J No Label AF 3 CCOVA1800CE02 J Terminal Cover Ass y AT 4 CCOVA1811CE01 J Stand Ass y BR å 5 KLMP 0112CEZZ J Lamp Upper BB CABINET PARTS LIST å 6 KLMP 0113CEZZ J Lamp Lower BB 7 LANGQ9206CEFW J Fixing Angle x4 AF 8 PGiDM0058CEZZ J Lamp Guide Plate BK 9 PSHEP0179CEZZ J Diffusion Sheet x2 AS 10 PSHEP0180CEZZ J Reflection Polarizing Sheet BR 11 PSHEP0186CEZZ J Reflec...

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