TopPage LC-42D43U SERVICE MANUAL No.S77L5LC42D43U LCD COLOR TELEVISION MODEL LC-42D43U In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and only parts identical to those specified should be used. OUTLINE This Service Manual covers the differences from LC-32/37D42U. For other technical information, refer to the LC32/37D42U (No. S06X9LC32D42U) Service Manual. CONTENTS OUTLINE AND MODIFIED PARTS LIST OUTLINE.........
LC-42D43U LC-42D43U OUTLINE AND MODIFIED PARTS LIST Service Manual OUTLINE This Service Manual covers the differences from LC-32/37D42U. For other technical information, refer to the LC-32/37D42U (No. S06X9LC32D42U) Service Manual. MODIFIED PARTS LIST Ref.No.
LC-42D43U Ref.No. Q8452 R1170 R1176 R1401 R1402 R1403 R1412 R1511 R1513 R1521 R1522 R1523 R1524 R1531 R1597 R1599 R1609 R1614 R2012 R2013 R2017 R2030 R2039 R2040 R2041 R2069 R2254 R2255 R2256 R2259 R2261 R2263 R2264 R2629 R2630 R2631 R3307 R3323 R3324 R8144 R8162 R8163 R8164 R8169 R8170 R8197 R8198 R8199 R8454 R8455 R8701 R8702 R8709 R8729 R9007 R9116 R9201 R9205 R9209 R9306 R9614 R9712 R9713 SC1503 Description Transistor KTA1298Y Resistor 10k 1/16W Metal Oxide Resistor 330 1/16W Metal Oxide Resistor 4.
LC-42D43U Ref.No. TU1101 Description Tuner LC-32D42U/37D42U (Base Model) RTUDAA007WJQZ AV TERMINAL Unit Refer to Parts List. CABINET PARTS Refer to Parts List. SUPPLIED ACCESSORIES Refer to Parts List. PACKING PARTS Refer to Parts List.
LC-42D43U LC-42D43U SAFETY PRECAUTION Service Manual IMPORTANT SERVICE SAFETY PRECAUTION Service work should be performed only by qualified service technicians who are thoroughly familiar with all safety checks and the servicing guidelines which follow: WARNING • 1. For continued safety, no modification of any circuit should be attempted. Use an AC voltmeter having with 5000 ohm per volt, or higher, sensitivity or measure the AC voltage drop across the resistor.
LC-42D43U PRECAUTIONS A PRENDRE LORS DE LA REPARATION Ne peut effectuer la réparation qu' un technicien spécialisé qui s'est parfaitement accoutumé à toute vérification de sécurité et aux conseils suivants. AVERTISSEMENT • A l'aide de deux fils à pinces, brancher une résistance de 1.5 kΩ 10 watts en parallèle avec un condensateur de 0.15μF en série avec toutes les pièces métalliques exposées du coffret et une terre connue comme une conduite électrique ou une prise de terre branchée à la terre. 1.
LC-42D43U CHAPTER 1.
LC-42D43U [2] OPERATION MANUAL 1–2
LC-42D43U 1–3
LC-42D43U 1–4
LC-42D43U 1–5
LC-42D43U 1–6
LC-42D43U 1–7
LC-42D43U [3] DIMENSIONS 1–8
LC-42D43U Service CHAPTER 2. REMOVING OF MAJOR PARTS LC-42D43U Manual [1] REMOVING OF MAJOR PARTS 1. Remove the SD Card Cover. 2. Remove the 4 lock screws and detach the Stand Base Ass'y. 3. Remove the 12 lock screws, 5 lock screws and detach the Rear Cabinet.
LC-42D43U 4. Remove the 4 lock screws and detach the Chassis Fixing Angle. 5. Remove the 4 lock screws and detach the Center Angle (L)(R). 6. Remove the 2 lock screws and detach the Stand Assist Angle. 7. Remove the 2 lock screws and detach the Stand Assist Cover. 8. Remove the 4 lock screws and detach the Stand Fixing Angle. 9. Remove the 7 lock screws, detach the MAIN Shield.
LC-42D43U 10.Disconnect all the connectors from all the PWBs. 11.Remove the Top Cover Ass'y. Remove the 1 lock screw from the Top Cover Ass'y and detach the KEY Unit.
LC-42D43U 12.Remove the 7 lock screws and detach the Tray Chassis. 13.Remove the 2 lock screws, 3 lock screws, 2 lock screws, 2 hexagonal shaft for D-sub and detach the Terminal Angle. 14.Remove the 7 lock screws and detach the POWER Unit. 15.Remove the 4 lock screws and detach the TERMINAL Unit. 16.Remove the 5 lock screws, 3 rivet and detach the Heat Sink and MAIN PWB. 17.Remove the 2 lock screws and detach the Speaker (L)(R). 18.Detach the R/C, LED Unit.
LC-42D43U 19.Remove the 4 lock screws and detach the Tray Fixing Angle (L)(R). 20.Remove the 7 lock screws and detach the Lug Angle Top. 21.Remove the 9 lock screws and detach the Lug Angle Bottom. 22.Remove the LCD Panel Module.
LC-42D43U CHAPTER 3. ADJUSTMENT LC-42D43U Service Manual [1] ADJUSTMENT PROCEDURE The adjustment values are set to the optimum conditions at the factory before shipping. If a value should become improper or an adjustment is required due to part replacement, make an adjustment according to the following procedure. 1. After replacement of any PWB unit and/or IC for repair, please note the following. When replacing the following units, make sure to prepare the new units loaded with updated software.
LC-42D43U Adjustment item Adjustment conditions MG3B**** MG3R**** Point 1 Adjustment procedure X=0.272 ±0.0110 y=0.277 Set conditions for inspection AV MODE: [DYNAMIC] (Reset) Monochrome: ON Black: OFF Color Temp: High Back Light: +16 Aging Time: Min. 60 minutes 216 Note Point 2 LEV20064 (WBI20256) MG2G**** MG2B**** MG2R**** Point 1 LEV10048 (WBI10192) MG1G**** MG1B**** MG1R**** ±0.0200 Writing MSET0003 2.2. Key writing 1.
LC-42D43U 2. Adjustment sequence (adjustment according to the G adjustment value of gradation 6) * Make sure the adjusting point gradations are correct since they are different for each model. PC Set the light level to MAX with the light control command (SBSL0016 for 45). SBSL0016 Set Setting is complete. OK Multi point adjustment mode setting MSET0001 Multi point adjustment mode is set. OK Initialize adjustment values. MSET0004 Initialization is done.
LC-42D43U PC Set Start measurement Repeat until RGB become the target values. Adjust RB to the target xy values. MG5RXXXX MG5BXXXX * XXXX indicates the adjusted values between 0000 and 1023 (4 digit decimal number with zero fill). * G is fixed. * The default adjustment value of RGB is the parameter value of the WBI5 command multiplied by 2. The adjustment value is reflected in the image. Adjustment values are set.
LC-42D43U PC Set Start measurement Repeat until RGB become the target values. Adjust RB to the target xy values. MG3RXXXX MG3BXXXX * XXXX indicates the adjusted values between 0000 and 1023 (4 digit decimal number with zero fill). * G is fixed. * The default adjustment value of RGB is the parameter value of the WBI3 command multiplied by 2. The adjustment value is reflected in the image. Adjustment values are set.
LC-42D43U PC Set Start measurement Repeat until RGB become the target values. Adjust RB to the target xy values. MG1RXXXX MG1BXXXX * XXXX indicates the adjusted values between 0000 and 1023 (4 digit decimal number with zero fill). * G is fixed. * The default adjustment value of RGB is the parameter value of the WBI1 command multiplied by 2. The adjustment value is reflected in the image. Adjustment values are set. OK Writing of adjusted values MSET0003 Writing is complete.
L C -4 2 D 4 3 U Service CHAPTER 4. TROUBLESHOOTING TABLE LC-42D43U Manual [1] TROUBLESHOOTING TABLE No audio output during UHF/VHF reception Is SIF output from the tuner (TU1101_Pin15) normal? NO Check the tuner and peripheral circuits. YES Is input signal fed to pin 21 of IC1401 (SIF Demodulator) normal? NO Check the filter circuits (Q1102-3) and peripheral circuits. NO Check between pins 29 and 30 of IC1401 and pins 51 and 52 of IC1404 (CODEC).
LC-42D43U No audio output from external input <> [INPUT-4/INPUT5 (Digital audio mode)] Is digital audio signal (DTV_SPDIF) fed from pin E12 of IC8101 to pin 4 of IC1404? <> [INPUT-5 (Analog audio mode)] Is L-ch audio signal fed from pin 3 of input terminal J1501 to pin 57 of IC1404? Is R-ch audio signal fed from pin 2 of input terminal J1501 to pin 58 of IC1404? PCINPUT<> Is L-ch audio signal fed from pin 2 of input terminal J1502 to pin 55 of IC1404? Is R-ch audio signal fed from pin3
LC-42D43U No video output (1) No video output from external input <> Is INPUT-1 selected on the input switching menu screen? Select INPUT-1 and the input signal on the input switching menu screen. NO When INPUT-1 cannot be selected since the characters INPUT-1 on the menu screen are gray. Is the video signal detection function normal? Check between J501 and pin 70 of IC501.
LC-42D43U No video output (2) No video output from external input <> Is INPUT-2 selected on the input switching menu screen? Select INPUT-2 and the input signal on the input switching menu screen. NO When INPUT-2 cannot be selected since the characters INPUT-2 on the menu screen are gray. Is the video signal detection function normal? Check between J502 and pin 76 of IC501.
LC-42D43U No video output (3) No video output from external input <> Is INPUT-3 selected on the input switching menu screen? YES Is signal fed to each input terminal of IC501 (AV SWITCH)? Is video signal fed to pin 3 of IC501? Are Y and C signals fed to pins 5 and 7 of IC501 respectively? YES Is video signal sent to pin 60 of IC501? Are Y and C
LC-42D43U No video output (4) No video output from external input <> Is INPUT-1 selected on the input switching menu screen? NO Select INPUT-1 and the input signal on the input switching menu screen. When INPUT-1 cannot be selected since the characters INPUT-1 on the menu screen are gray. Is the component video signal detection function normal? Check between 8 pin of J501 and pin 38 of IC501.
LC-42D43U No video output (5) No video output from external input <> Is INPUT-2 selected on the input switching menu screen? NO Select INPUT-2 and the input signal on the input switching menu screen. When INPUT-2 cannot be selected since the characters INPUT-2 on the menu screen are gray. Is the component video signal detection function normal? Check between 8 pin of J502 and pin 40 of IC501.
LC-42D43U No video output from HDMI input (INPUT4) INPUT4 Are signals fed from HDMI (SC1501) connector to input terminals H_RX0± (pins 70 and 71), H_RX1± (pins 73 and 74), H_RX2± (pins 76 and 77) and H_RXC± (pins 67 and 68) of IC1507 (TMDS_SW)? NO Is IC1501 (E2PROM) accessed with I2C when connecting HDMI device and is DDC_I2C_CLOCK/DATA data read out? YES NO Check IC1501 and peripheral circuits. Are cables connected securely? Check the setting of HDMI device.
LC-42D43U Service Manual CHAPTER 5.
LC-42D43U 5–2
LC-42D43U [2] SYSTEM BLOCK DIAGRAM SYSTEM BLOCK DIAGRAM , /#+0 6'4/+0#. + 8A# +0276 * %8$5 .4 %QORQPGPV ;2D2T %8$5 .4 %8$5 8 . 4 %QORQPGPV ;2D2T 8KFGQ 8 ;2D2T 8KFGQ 8 ;2D2T 5&A. 5&A% % ˴ /*\ ; ˴ /*\ #PCNQI 4)$ '&5#('A%8$5A '&5#('A+(A2 '&5#('A+(A0 : /*\ /56 / *& 8& &KIKVCN +0 &8+#= ? &8+%.&8+*5;0% &8+85;0% &8+&' 4)$ DKV %- *& 8& &' ) +% #/2 %8$5 *&/+A+ % 8 )#+0 8 &KUENGVG $2( # 8 #(6 7# *&/+A%.
LC-42D43U 㧸㧯㧰 8 +% +% &&4 5&4#/ /DKV &&4 ((% 㪣㪚㪛 㪧㪘㪥㪜㪣 +% .8&5 6Z 8*+8 #).( ; 4 . 7 & .8 2 R ((% & 8 &KIKVCN 1WV &81 #= ? DKV &KIKVCN &81%.- &81%.- &81&' &81*5;0% &8185;0% &81&' 6'/2= ? 1 5A5'6 (4#/' ((% 5* 2 RKP 20. 8 +% 4GUGV 8DTV * A+ % +08A'44 $7 8 +% ''241/ $4 . ( 㧮㧸 6* 6JGTOKUVGT ޣ.#ޤ RKP : : VCN /*\ ޣ.%ޤ RKP +08'46'4 㩷 ޣ.#ޤ RKP #(6 +08'46'4 㩷 ޣ.
LC-42D43U CHAPTER 6.
LC-42D43U AV TERMINAL Unit (Side-A Chip) J503 R532 D507 C519 R533 R534 C520 SC502 SC501 k001 R583 Q506 C553 LF1 D2702 D2703 R2724 P2704 R2722 C2733 R2723 C2742 C2734 L2702 L2701 C2741 C2718 LUG2702 D2701 C2717 C2709 C2706 C2745 R2706 R2704 C2711 C2720 R2701 C2747 C2716 R2703 R2702 R2705 FB519 C547 C546 R577 Q504 C552 P2703 C IC2701 C2703 C2746 C2715 C2701 R2719 C2708 FB2704 C2707 C2710 C2714 C2725 R2713 C2731 C2726 R2714 10 9 8 C518 R594 R593
LC-42D43U — MEMO — 6–3
LC-42D43U CHAPTER 7. SCHEMATIC DIAGRAM LC-42D43U Service Manual [1] DESCRIPTION OF SCHEMATIC DIAGRAM 1. VOLTAGE MEASUREMENT CONDITION: 1) The voltages at test points are measured on exclusive AC adaptor and the stable supply voltage of AC 120V. Signals are fed by a color bar signal generator for servicing purpose and the above voltages are measured with a 20k ohm/V tester. 2. INDICATION OF RESISTOR & CAPACITOR: RESISTOR 1) The unit of resistance "Ω" is omitted. (K=kΩ=1000Ω, M=MΩ).
LC-42D43U [2] SCHEMATIC DIAGRAM AV TERMINAL Unit-1/2 , + * ) ( ' & % $ # 7–2
LC-42D43U 7–3
LC-42D43U AV TERMINAL Unit-2/2 , + * ) ( ' & % $ # 7–4
LC-42D43U 7–5
LC-42D43U MAIN Unit-1/20 , + * ) ( ' & % $ # 7–6
LC-42D43U 7–7
LC-42D43U MAIN Unit-2/20 , + * ) ( ' & % $ # 7–8
LC-42D43U 7–9
LC-42D43U MAIN Unit-3/20 , + * ) ( ' & % $ # 7 – 10
LC-42D43U 7 – 11
LC-42D43U MAIN Unit-4/20 , + * ) ( ' & % $ # 7 – 12
LC-42D43U 7 – 13
LC-42D43U MAIN Unit-5/20 , + * ) ( ' & % $ # 7 – 14
LC-42D43U 7 – 15
LC-42D43U MAIN Unit-6/20 , + * ) ( ' & % $ # 7 – 16
LC-42D43U 7 – 17
LC-42D43U MAIN Unit-7/20 , + * ) ( ' & % $ # 7 – 18
LC-42D43U 7 – 19
LC-42D43U MAIN Unit-8/20 , + * ) ( ' & % $ # 7 – 20
LC-42D43U 7 – 21
LC-42D43U MAIN Unit-9/20 , + * ) ( ' & % $ # 7 – 22
LC-42D43U 7 – 23
LC-42D43U MAIN Unit-10/20 , + * ) ( ' & % $ # 7 – 24
LC-42D43U 7 – 25
LC-42D43U MAIN Unit-11/20 , + * ) ( ' & % $ # 7 – 26
LC-42D43U 7 – 27
LC-42D43U MAIN Unit-12/20 , + * ) ( ' & % $ # 7 – 28
LC-42D43U 7 – 29
LC-42D43U MAIN Unit-13/20 , + * ) ( ' & % $ # 7 – 30
LC-42D43U 7 – 31
LC-42D43U MAIN Unit-14/20 , + * ) ( ' & % $ # 7 – 32
LC-42D43U 7 – 33
LC-42D43U MAIN Unit-15/20 , + * ) ( ' & % $ # 7 – 34
LC-42D43U 7 – 35
LC-42D43U MAIN Unit-16/20 , + * ) ( ' & % $ # 7 – 36
LC-42D43U 7 – 37
LC-42D43U MAIN Unit-17/20 , + * ) ( ' & % $ # 7 – 38
LC-42D43U 7 – 39
LC-42D43U MAIN Unit-18/20 , + * ) ( ' & % $ # 7 – 40
LC-42D43U 7 – 41
LC-42D43U MAIN Unit-19/20 , + * ) ( ' & % $ # 7 – 42
LC-42D43U 7 – 43
LC-42D43U MAIN Unit-20/20 , + * ) ( ' & % $ # 7 – 44
LC-42D43U 7 – 45
LC-42D43U — MEMO — 7 – 46
LC-42D43U PartsGuide PARTS GUIDE LCD COLOR TELEVISION MODEL LC-42D43U CONTENTS [1] PRINTED WIRING BOARD ASSEMBLIES [4] DUNTKD935FME03 (TERMINAL Unit) [2] LCD PANEL (NOTE: THE PARTS HERE SHOWN ARE SUPPLIED AS AN ASSEMBLY BUT NOT INDEPENDENTLY.) [5] CABINET PARTS [6] SUPPLIED ACCESSORIES [7] PACKING PARTS (NOT REPLACEMENT ITEM) [8] SERVICE JIGS (USE FOR SERVICING) [3] DUNTKD862FM04 (MAIN Unit) (Only changed parts have been described.
LC-42D43U NO. PARTS CODE PRICE NEW PART RANK MARK DELIVERY DESCRIPTION [1] PRINTED WIRING BOARD ASSEMBLIES N N N DUNTKD862FM04 DUNTKD935FM03 RDENCA226WJQZ BT N N N X MAIN Unit AV TERMINAL Unit POWER Unit [2] LCD PANEL (NOTE: THE PARTS HERE SHOWN ARE SUPPLIED AS AN ASSEMBLY BUT NOT INDEPENDENTLY.) N RLCUCA122WJZZ N J 42" LCD Panel Module [3] DUNTKD862FM04 (MAIN Unit) (Only changed parts have been described.
LC-42D43U NO.
LC-42D43U NO.
LC-42D43U NO.
LC-42D43U [5] CABINET PARTS 3 3-1 7 41 5 3-2 25 42 35 28 54 48 43 1 28 1-6 1-6 1-1 1-7 1-4 48 1-6 1-6 1-5 1-6 1-6 54 1-9 1-3 55 2 52 15 4-4 1-7 1-7 1-7 6 1-7 1-7 1-8 2-1 1-2 1-7 52 49 23 46 38 23 49 50 10 49 47 49 50 44 49 16-3 55 49 49 49 16-2 16-1 17-2 55 50 36 19 34 49 21 20 31 12 50 17 50 50 40 49 29 24-3 49 35 32 18 49 39 22 26 9 4-2 51 30 11 14 53 13 4 4-1 4-3 55 55 55 6 49 49 49 24-2 17-3 55 8 24-1 27 17-1 33 37
LC-42D43U NO.
LC-42D43U [6] SUPPLIED ACCESSORIES : : : : : : : : : 8
LC-42D43U NO.
LC-42D43U [7] PACKING PARTS (NOT REPLACEMENT ITEM) S6 S7 S4 S4 S1 S3 S5 S4 S4 S2 10
LC-42D43U NO. PARTS CODE PRICE NEW PART RANK MARK DELIVERY DESCRIPTION [7] PACKING PARTS (NOT REPLACEMENT ITEM) S1 S2 S3 S4 S5 S6 S7 SPAKCD512WJZZ SPAKCD085WJZZ SPAKPA774WJZZ SPAKXB531WJZZ TLABKA009WJZZ SSAKA0101GJZZ SSAKAA032WJZZ AB N N J Packing Case Bottom Case Wrapping Paper Buffer Material No. Label Polyethylene Bag Polyethylene Bag J J J J J J L=1000mm, x2, POWER to INV.
LC42D43U 2007 BY SHARP CORPORATION COPYRIGHT © 2006 ALL RIGHTS RESERVED. No Part of this publication may be reproduced, stored in a retrieval system, or transmitted in any from or by any means, electronic, mechanical, photocopying , recording, or otherwise, without prior written permission of the publisher. Jun. 2007 Printed in Japan TQ -S SH.