Sharp LC-20SH4U Service Manual Download Page 5

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LC-20SH4U

SUPPLEMENT

REMOVING OF MAJOR PARTS

1. Remove the stand cover fixing screws (1 pc.).

2. Remove the stand fixing screws (4 pcs.).

3. Remove the cabinet B fixing screws (13 pcs.).

4. Remove the cabinet B after opening from the direction of an arrow.

5. Detach the connector from each PWB.

Cabinet A

Cabinet B

Stand

Stand Cover

P6703

P6702

P6701

P6700

SC1701

SC2003

SC1201

P7301

P3902

SC2002

SC2001

P3901

P3301

SC3601

CN1

SC4201

SC4001

P6705

P3601

SC6701

Main PWB

R/C,LED PWB

Sub PWB

Inverter PWB

Operation PWB

Summary of Contents for LC-20SH4U

Page 1: ...MENT PARTS LIST 58 PACKING OF THE SET 69 Page SUPPLEMENT The LCD panel of this model has been redesigned With this redesign the main sub and R C LED PWB unit as well as the LCD panel related and other component parts have also been modified In this respect these parts of this model are not interchangeable with those of previous LCD panel models in servicing This Service Manual covers the modified ...

Page 2: ...rts which do not have the same safety characteristics as the factory recommended replacement parts shown in this service manual may create shock fire or other hazards WARNING 1 For continued safety no modification of any circuit should be attempted 2 Disconnect AC power before servicing BEFORE RETURNING THE RECEIVER Fire Shock Hazard Before returning the receiver to the user perform the following ...

Page 3: ...diquées dans ce manuel peut provoquer des électrocutions incendies ou autres accidents AVERTISSEMENT 1 Pour la sécurité continue n entreprendre aucune modification de tout circuit 2 Débrancher l alimentation CA avant la réparation AVANT DE RENDRE LE RECEPTEUR A L UTILISATEUR Incendie et choc électrique Avant de rendre le récepteur à l utilisateur effectuer les vérifications suivantes 1 Inspecter t...

Page 4: ... which is higher than the conventional lead solder by 40 C and as it has poor solder wettability you may be apt to keep the soldering bit in contact with the PWB for extended period of time However Since the land may be peeled off or the maximum heat resistance temperature of parts may be exceeded remove the bit from the PWB as soon as you confirm the steady soldering condition Lead free solder co...

Page 5: ...rews 13 pcs 4 Remove the cabinet B after opening from the direction of an arrow 5 Detach the connector from each PWB Cabinet A Cabinet B Stand Stand Cover 4 2 3 3 1 P6703 P6702 P6701 P6700 SC1701 SC2003 SC1201 P7301 P3902 SC2002 SC2001 P3901 P3301 SC3601 CN1 SC4201 SC4001 P6705 P3601 SC6701 5 5 5 5 5 5 5 5 Main PWB R C LED PWB Sub PWB Inverter PWB Operation PWB ...

Page 6: ...verter PWB and take out the inverter PWB 9 Remove the 2 lock screws from the R C LED PWB and take out the R C LED PWB 10 Remove the 2 lock screws from the operation panel top cover and detach the operation panel top cover 11 Remove the 3 lock screws from the operation PWB and detach the operation PWB 12 Remove the 4 lock screws each from the right and left speakers and take out both the speakers 6...

Page 7: ...the LCD panel from the panel chassis Be careful not to touch the LCD panel s glass faces driver IC PWBs and other components with bare hands Otherwise defects may be caused in the production line 16 Remove the diffusion sheets top lens sheet diffusion sheet bottom and diffusion plate Note Fit the diffusion plate and sheets tightly in the backlight casing If set out of position the panel may get cr...

Page 8: ...ection between Sub unit SC3601 and R C LED unit SC4001 and connect the extended cable QCNW D445WJQZ for service 7 Remove only SC6701 side of the lead from between Sub unit P3601 and Inverter unit SC6701 and connect the extended cable QCNW D449WJQZ for service 8 Remove the PWB unit fixing screws main unit 2 pcs sub unit 2 pcs inverter unit 3 pcs Step Part No Description 1 QCNW C458WJQZ Extension Ca...

Page 9: ...e controller 3 Key operation in the adjustment process Basic operation Selecting the receiving channels Using the CH ù Ù keys turn up and down an actual receiving channel Snap press The channels are turned up and down one by one Continuous press The next receivable channel is searched Various adjustments The items are adjusted one by one by selecting on the menu screen and using the cursor key and...

Page 10: ... peak to peak of the wave be minimized 6 2 TAMP adjustment 1 Receive the standard color bar signal 2 See if the Y reading maximum on Adjustment Process Page 2 is within the range in the following table If not adjust the NTSC TAMP setting on the same page to have the Y reading maximum within this range Reference Adjustment Process Menu Page 2 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 ...

Page 11: ...center y 0 278 0 004 0 01 Radius from the center White 40 x 0 258 0 002 0 01 Radius from the center y 0 261 0 002 0 01 Radius from the center Adjusting with the bus Cut off RGB CUTOFF2 Fix the G setting at 0 Vary the R and B settings accordingly Adjustment range 40 Gain RGB GAIN Reduce the two strong colors Adjustment range Down to 40 Reading with Minolta CA 210 7 Factory settings 7 1 Making facto...

Page 12: ...K NONE X NONE BLOCK NONE TV GUIDELINES TV Y NONE BLOCK NONE TV Y7 NONE BLOCK NONE TV G NONE BLOCK NONE TV PG NONE BLOCK NONE TV 14 NONE BLOCK NONE TV MA NONE BLOCK NONE BLOCK CONTENT D BLANK BLOCK BLANK UN BLOCK L BLANK BLOCK BLANK UN BLOCK S BLANK BLOCK BLANK UN BLOCK V BLANK BLOCK BLANK UN BLOCK FV BLANK BLOCK BLANK UN BLOCK CAN ENGLISH RATINGS C NONE BLOCK NONE C8 NONE BLOCK NONE G NONE BLOCK N...

Page 13: ... 2 SEE THE ADJUSTMENT PROCEDURES R GAIN 0 WHITE BALANCE ADJUSTMENT 2 SEE THE ADJUSTMENT PROCEDURES G GAIN 0 WHITE BALANCE ADJUSTMENT 2 SEE THE ADJUSTMENT PROCEDURES B GAIN 0 WHITE BALANCE ADJUSTMENT 2 SEE THE ADJUSTMENT PROCEDURES RGB GAMMA 1 0 RGB γ COEFFICIENT SETTING NOT USED TABLE OF VARIOUS SETTINGS 9 I2C DATA 0 I2C BUS CONTROL IC DATA WRITE AND READ NOT USED I2C DATA WAIT WRITE AND READ EXEC...

Page 14: ... INPUT Change to 0675 OTHER 0775 EQUALIZER SETTING WITH OTHER INPUT THAN TV Change to 0675 BAND5 CNT TV 0025 EQUALIZER SETTING WITH TV INPUT Change to 0125 OTHER 0025 EQUALIZER SETTING WITH OTHER INPUT THAN TV Change to 0125 BAND5 MAX TV 0825 EQUALIZER SETTING WITH TV INPUT Change to 0925 OTHER 0825 EQUALIZER SETTING WITH OTHER INPUT THAN TV Change to 0925 Page No Item Initial Function Response pr...

Page 15: ...M AV SHARP V 100 V PICTURE QUALITY SETTING COMPOSITE S VIDEO NOT USED SECAM AV SHARP H1 150 H PICTURE QUALITY SETTING 1 COMPOSITE S VIDEO NOT USED SECAM AV SHARP H2 150 H PICTURE QUALITY SETTING 2 COMPOSITE S VIDEO NOT USED VIDEO ADJUSTMENT DVP7 PAL60 AV CONT 128 IMAGE SETTING COMPOSITE S VIDEO NOT USED PAL60 AV BRIGHT 128 BRIGHTNESS SETTING COMPOSITE S VIDEO NOT USED PAL60 AV COLOR 37 COLOR DENSI...

Page 16: ...525I SHARP V 100 V PICTURE QUALITY SETTING Component NOT USED 525I SHARP H1 150 H PICTURE QUALITY SETTING 1 Component Change to 100 525I SHARP H2 150 H PICTURE QUALITY SETTING 2 Component Change to 100 525P CONT 133 IMAGE SETTING Component Change the value from 133 to 120 525P BRIGHT 128 BRIGHTNESS SETTING Component Change the value from 128 to 136 525P COLOR 52 COLOR DENSITY SETTING Component Cha...

Page 17: ... V 100 V PICTURE QUALITY SETTING Component NOT USED 1125I SHARP H1 100 H PICTURE QUALITY SETTING 1 Component NOT USED 1125I SHARP H2 100 H PICTURE QUALITY SETTING 2 Component NOT USED 750P CONT 133 IMAGE SETTING Component NOT USED 750P BRIGHT 128 BRIGHTNESS SETTING Component NOT USED 750P COLOR 52 COLOR DENSITY SETTING Component NOT USED 750P TINT 128 TINT SETTING Component NOT USED 750P SHARP V 1...

Page 18: ...ENT 5 NOT USED SYNC ON 10 CHANNEL PRESET SYNC DETECT SENSE NOT USED SYNC WIDTH 1 CHANNEL PRESET SYNC DETECT LEVEL NOT USED OTHERS OTHERS1 DAC DATA 00 DAC RELATED GENERAL PURPOSE NOT USED VARIABLE SETTINGS L ERROR WAIT 15s LAMP ERROR DETECT WAIT TIME NOT USED L ERROR H TIME 1 0s LAMP ERROR DETECT TIME NOT USED TV AUTO GAIN OFF AUTO GAIN SETTING FOR TV NOT USED PWM FREQ 150 DIMMER FREQUENCY SETTING ...

Page 19: ... is turned off and the usual display appears instead when the power is turned on again 2 Test pattern displayed The following test pattern appears onscreen The DVP test pattern comes in 22 different types 1 Black white Size Minimum 2 Black white Size Small 3 Black white Size Medium 4 Black white Size Large 5 Crosshatch Spacing Minimum 6 Crosshatch Spacing Small 7 Crosshatch Spacing Medium 8 Crossh...

Page 20: ...its Is there DC 18V input at F6700 thru F6704 Check the primary side of T7001 IC7301 and their peripheral circuits Disconnect F6700 thru F6704 Is the load short circuited Check the related line IC1004 and its peripheral circuits Is pin 187 of IC1004 at H or pulse Check the inverter unit and fluorescent lamp and replace as required Check the primary side of T7001 Q3305 and their peripheral circuits...

Page 21: ... the input at pin 24 of S terminal detector IC2003 as specified No Is the input at pin 40 of IC1004 as specified Are the voltages at pins 6 7 and 9 of tuner as specified No image at all Check the microprocessor s adjustment process menu for wrong settings No TV output No Video 1 output No S Video output No Component output Check the LCD panel voltage and waveform Yes Yes Check the related line Yes...

Page 22: ...Pin 39 of IC1300 About 8V Pins 65 and 66 of IC1300 About 5V Pins 11 12 and 13 of IC1300 About 3 3V Check the line from power circuit to pin 7 of IC3301 No sound from monitor output Check IC1300 and its peripheral circuits Check the line from pin 58 of IC2003 to Q3901 Q3902 and Q3903 Are there audio signal outputs from pins 36 Rch and 37 Lch of IC1300 Is the collector signal of Q3901 at L Check the...

Page 23: ...1004 and its peripheral circuits Is the input at pin 31 of IC1004 as specified Check pin 15 of SC2002 No Are the inputs at pins 21 and 33 of IC1004 as specified Check the CB and CR lines of SC2001 and their peripheral circuits Check the microprocessor s adjustment process menu for wrong settings No color on Video No color on S Video No color on Component ...

Page 24: ...B INV_PWB LCD_Panel MPWEH MPWEL MPOE MPCE TSTCLK CSYNC Component IN AUDIO IN Y IN Pb IN Pr IN U V TUNER VIDEO S IF 5V 3V IMZ1A x 2 to Main Micon AFT AV IN AUDIO IN VIDEO IN SY IN SC IN S SW VSYNC MPCLK MPRDA MPRCS H OUT V OUT LAMP IC1201 BD8133FV Gradation IC E2PROM VHIBR24L64F 1 S DETECT SP x2 1 0 1 0W AUDIO_POWER_AMP IC3301 LA4635A Analog SP_MUTE SLEEP S_STBY HP Front Jack 35ø STEREO SP SIF AMP ...

Page 25: ...27 LC 20SH4U SUPPLEMENT 26 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H OVERALL WIRING DIAGRAM ...

Page 26: ...29 LC 20SH4U SUPPLEMENT 28 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H ËMAIN Unit 1 5 ...

Page 27: ...31 LC 20SH4U SUPPLEMENT 30 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H ËMAIN Unit 2 5 ...

Page 28: ...33 LC 20SH4U SUPPLEMENT 32 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H ËMAIN Unit 3 5 ...

Page 29: ...35 LC 20SH4U SUPPLEMENT 34 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H ËMAIN Unit 4 5 ...

Page 30: ...37 LC 20SH4U SUPPLEMENT 36 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H ËMAIN Unit 5 5 ...

Page 31: ...39 LC 20SH4U SUPPLEMENT 38 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H ËSUB Unit 1 4 ...

Page 32: ...41 LC 20SH4U SUPPLEMENT 40 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H Note SUB 3 does not use it ËSUB Unit 2 4 ...

Page 33: ...43 LC 20SH4U SUPPLEMENT 42 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H ËSUB Unit 4 4 ...

Page 34: ...44 6 5 4 3 2 1 A B C D E F G H LC 20SH4U SUPPLEMENT ËR C LED Unit ...

Page 35: ...45 6 5 4 3 2 1 A B C D E F G H LC 20SH4U SUPPLEMENT PRINTED WIRING BOARD ASSEMBLIES R C LED Unit Wiring Side R C LED Unit Chip Parts Side ...

Page 36: ...47 LC 20SH4U SUPPLEMENT 46 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H MAIN Unit Side A ...

Page 37: ...046 P2001 TL2054 TL2051 R1048 C1057 C1058 C1053 C1055 TL2056 TL2053 C1050 C1049 C1047 C1046 C1045 C1044 C1043 R1093 C1042 C1041 R1092 R1082 C1040 C1039 C1015 C1038 C1037 C1036 C1035 C1034 C1033 L1000 C1009 C1032 C1031 C1030 C1029 C1028 C1027 C1026 C1024 C1054 C1090 R1091 C1052 C1056 C1059 C1060 C1063 C1066 C1068 C1069 C1071 C1073 C1075 C1076 C1077 C1078 C1735 IC1004 C1079 C1080 C1733 C1081 C1082 C...

Page 38: ...51 LC 20SH4U SUPPLEMENT 50 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H MAIN Unit Side B ...

Page 39: ...2003 TL2041 R2042 R2030 R2065 R2071 C2016 TL2040 R2026 TL2057 R2038 R2021 Q2001 C2017 C2015 R2036 R2013 R2035 C2014 R2022 R2034 C2011 C2018 R2033 R2018 R2014 R2028 TL2047 R2012 R2003 C2001 IC2004 R2024 R2020 R2019 C2009 C2007 R1097 R2073 R2067 R2066 C2005 TL2043 R2009 TL2038 C2002 TL2039 TL2042 TL2045 TL2049 C2004 R1316 TL2050 TL2048 C1245 Q1209 Q1211 R1227 D1207 D1206 Q1213 R1272 Q1207 R1228 R123...

Page 40: ...55 LC 20SH4U SUPPLEMENT 54 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H SUB Unit Wiring Side ...

Page 41: ...57 LC 20SH4U SUPPLEMENT 56 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H SUB Unit Chip Parts Side ...

Page 42: ...SCRIPTION in CANADA Contact SHARP Electronics of Canada Limited Phone 416 890 2100 Ref No Part No Description Code Ref No Part No Description Code PRINTED WIRING BOARD ASSEMBLYS NOT REPLACEMENT ITEM Note The operation unit have only the part number changed There is no change in the Schematic Diagram Printed Wiring Board Assemblies and Parts List DUNTKD035WEF9 SUB Unit DUNTKD036WEF9 OPERATION Unit ...

Page 43: ...AD C7002 VCKYCY1HB562KY J 5600p 50V Ceramic AA C7003 RC EZA464WJZZ J 1000 16V Electrolytic AD C7004 VCKYCY1HB562KY J 5600p 50V Ceramic AA C7005 VCCCCY1HH181JY J 180p 50V Ceramic AA C7006 VCESKA1HM476M J 47 50V Electrolytic AD C7007 VCKYCY1HF104ZY J 0 1 50V Ceramic AA C7008 VCESKA1CM337M J 330 16V Electrolytic AD C7009 VCKYTV1CF105ZY J 1 16V Ceramic AB C7010 RC EZA450WJZZ J 1500 10V Electrolytic AD...

Page 44: ...BE102JY J 1k 1 8W Carbon AA R7715 VRD RA2BE102JY J 1k 1 8W Carbon AA R7716 VRD RM2HD220JY J 22 1 2W Carbon AA R7717 VRS TQ2BD102JY J 1k 1 8W Metal Oxide AA R7718 VRS TQ2BD562JY J 5 6k 1 8W Metal Oxide AA R7719 VRD RM2HD220JY J 22 1 2W Carbon AA R7720 VRS TQ2BD102JY J 1k 1 8W Metal Oxide AA å R7724 RR HZ0053CEZZY J 10M 1 2W Special AC Carbon Film R7725 VRS TQ2BD153JY J 15k 1 8W Metal Oxide AA R7732...

Page 45: ...P6X AE IC2001 VHiPQ1L333M 1Y J PQ1L333M2SP AD IC2003 RH iXA630WJZZQ J M30622MWP 245F AV IC2004 VHiPST3229N1EY J PST3229 AD IC2005 VHiBR24L64F 1Y J BR24L64F WE2 AK TRANSISTORS Q1000 VSFMMT718 1Y J FMMT718 AE Q1002 VS2SC3928AR 1Y J 2SC3928AR AB Q1201 VSDTC144EE 1Y J DTC144EE AA Q1202 VS2SA1037KQ 1Y J 2SA1037KQ AA Q1207 VS2SA1037KQ 1Y J 2SA1037KQ AA Q1209 VSDTC144EE 1Y J DTC144EE AA Q1211 VSDTC144EE ...

Page 46: ... 033 10V Ceramic AB C1074 VCKYCZ1AB333KY J 0 033 10V Ceramic AB C1075 VCKYCZ1AB333KY J 0 033 10V Ceramic AB C1076 VCKYCZ1AB333KY J 0 033 10V Ceramic AB C1077 VCKYCZ1AB333KY J 0 033 10V Ceramic AB C1078 VCKYCZ1AB333KY J 0 033 10V Ceramic AB C1079 VCKYCZ1AB333KY J 0 033 10V Ceramic AB C1080 VCKYCZ1AB333KY J 0 033 10V Ceramic AB C1081 VCKYCZ1AB333KY J 0 033 10V Ceramic AB C1082 VCKYCZ1AB333KY J 0 033...

Page 47: ...1017 VRS CY1JF000JY J 0 1 16W Metal Oxide AA R1018 VRS CY1JF473JY J 47k 1 16W Metal Oxide AA R1019 VRS CY1JF000JY J 0 1 16W Metal Oxide AA R1028 VRS CY1JF103JY J 10k 1 16W Metal Oxide AA R1030 VRS TV1JD102JY J 1k 1 10W Metal Oxide AA R1031 VRS CY1JF000JY J 0 1 16W Metal Oxide AA R1032 VRS CY1JF000JY J 0 1 16W Metal Oxide AA R1033 VRS CY1JF000JY J 0 1 16W Metal Oxide AA R1034 VRS CY1JF000JY J 0 1 1...

Page 48: ...tal Oxide AA R1329 VRS CY1JF561FY J 560 1 16W Metal Oxide AA R1330 VRS CY1JF102FY J 1k 1 16W Metal Oxide AA R1331 VRS CY1JF102JY J 1k 1 16W Metal Oxide AA R1332 VRS CY1JF103JY J 10k 1 16W Metal Oxide AA R1333 VRS CY1JF331JY J 330 1 16W Metal Oxide AA R1334 VRS TV1JD102JY J 1k 1 10W Metal Oxide AA R1335 VRS CY1JF103JY J 10k 1 16W Metal Oxide AA R1336 VRS CY1JF000JY J 0 1 16W Metal Oxide AA R1705 VR...

Page 49: ...rite Bead AB FB1701 RBLN 0006TAZZY J Ferrite Bead AB FB1702 RBLN 0006TAZZY J Ferrite Bead AB FB1703 RBLN 0006TAZZY J Ferrite Bead AB P2001 QPLGNA144WJZZY J Plug 20 pin AF SC1201 QCNCWA010WJZZYJ Connector 15 pin AE SC1701 QSOCNA222WJZZY J Socket 80 pin AH SC2001 QCNCWA010WJZZYJ Connector 15 pin AE SC2002 QCNCWA251WJZZYJ Connector 23 pin AH SC2003 QSOCN0596REZZ J Socket 5 pin AB LUG2001 QLUGHA006WJZ...

Page 50: ...22WJZZ J 20 LCD Panel Unit Ass y 5 1 Not Available 20 LCD Panel 5 2 LANGK3261TPZA J Bezel AX 5 3 PSLDK2567TPZZ J Diffusion Sheet Top x2 AQ 5 4 POFMA0220TPZZ J Lens Sheet BC 5 5 PSLDK2554TPZZ J Diffusion Sheet Bottom AN 5 6 PSLDK2553TPZZ J Diffusion Plate AX å 5 7 RLMPC2401TPZZ J Lamp Unit x5 AX 5 8 LHLDZ3104TPZA J Backlight Case BA 5 9 PZETE3778TPZZ J Spacer x2 AC 5 10 LX HZ2070TPZS J Screw x4 1 0...

Page 51: ...6 6 6 4 L A B A B K 5 8 5 9 5 9 5 6 5 5 5 4 5 1 5 2 5 10 5 10 5 3 5 5 7 5 11 21 4 21 4 5 21 4 1 4 2 4 3 4 4 R C LED PWB Main PWB Sub PWB Inverter PWB Operation PWB 11 10 23 17 17 23 23 14 2 9 7 19 8 18 22 2 3 2 2 2 5 2 4 2 6 2 1 2 7 15 16 20 3 3 2 3 6 3 3 3 1 3 5 3 4 25 1 1 3 1 3 1 4 1 4 1 5 1 1 1 2 13 24 12 24 13 A B J D F A B 26 A B C C I C C ...

Page 52: ...nterface Jig CC SUPPLIED ACCESSORIES å X1 QACCDA038WJPZ J AC Cord AL X2 RRMCGA367WJSA J Wireless Remote Control AV X3 TCADEA141WJZZ J Guarantee Card AC X4 TiNS B819WJN2 J Operation Manual French AD X5 TiNS B820WJN2 J Operation Manual Spanish AD X6 TiNS B905WJN2 J Operation Manual English AD X7 Not Available AA size Battery x2 PACKING PARTS NOT REPLACEMENT ITEM S1 SPAKCC262WJZZ Packing Case S2 SPAK...

Page 53: ...69 LC 20SH4U SUPPLEMENT PACKING OF THE SET X3 X4 X5 X6 X2 X1 S2 S4 S3 S3 S5 S3 S3 S6 S1 X7 ...

Page 54: ... system or transmitted in any form or by any means electronic mechanical photocopying recording or otherwise without prior written permission of the publisher SHARP CORPORATION AV Systems Group CS Promotion Center Yaita Tochigi 329 2193 Japan TQ1940 S Oct 2005 Printed in Japan MI KG Design and Production Information Design Japan Production NSEC ...

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