Sharp LC-20B4U-S Service Manual
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Sharp LC-20B4U-S Service Manual

Lcd color television
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See also: Operating Manual
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.
» IMPORTANT SERVICE SAFETY PRECAUTION ........................................................................................ 2
» SPECIFICATIONS ........................................................................................................................................5
» OPERATION MANUAL .................................................................................................................................6
» DIMENSIONS ...............................................................................................................................................8
» REMOVING OF MAJOR PARTS ..................................................................................................................9
» ADJUSTING PROCEDURE OF EACH SECTION ..................................................................................... 13
» PUBLIC MODE SETTING PROCEDURE ..................................................................................................32
» TROUBLE SHOOTING TABLE ...................................................................................................................38
» CHASSIS LAYOUT .....................................................................................................................................42
» BLOCK DIAGRAM ......................................................................................................................................44
» OVERALL WIRING DIAGRAM ...................................................................................................................46
» DESCRIPTION OF SCHEMATIC DIAGRAM ............................................................................................. 48
» SCHEMATIC DIAGRAM ............................................................................................................................. 49
» PRINTED WIRING BOARD ASSEMBLIES ................................................................................................74
» REPLACEMENT PARTS LIST .................................................................................................................... 86
» PACKING OF THE SET ..............................................................................................................................99
SHARP CORPORATION
SERVICE MANUAL
LCD COLOR TELEVISION
LC-20B4U-S
LC-20B4U-B
MODELS
CONTENTS
This document has been published to be used for
after sales service only.
The contents are subject to change without notice.
LC-20B4U-S
LC-20B4U-B
S43Z5LC-20B4U
Page

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Summary of Contents for Sharp LC-20B4U-S

  • Page 1: Table Of Contents

    LC-20B4U-S LC-20B4U-B SERVICE MANUAL S43Z5LC-20B4U LCD COLOR TELEVISION LC-20B4U-S LC-20B4U-B MODELS 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.

  • Page 2: Important Service Safety Precaution

    LC-20B4U-S LC-20B4U-B IMPORTANT SERVICE SAFETY PRECAUTION Ë Service work should be performed only by qualified service technicians who are thor- oughly familiar with all safety checks and the servicing guidelines which follow: • Use an AC voltmeter having with 5000 ohm per volt, or...
  • Page 3 LC-20B4U-S LC-20B4U-B PRECAUTIONS A PRENDRE LORS DE LA REPARATION Ë Ne peut effectuer la réparation qu' un technicien spécialisé qui s'est parfaitement accoutumé à toute vérification de sécurité et aux conseils suivants. conduite électrique ou une prise de terre branchée à la AVERTISSEMENT terre.
  • Page 4 LC-20B4U-S LC-20B4U-B Precautions for using lead-free solder 1 Employing lead-free solder "All PWBs" of this model employs lead-free solder. The LF symbol indicates lead-free solder, and is attached on the PWBs and service manuals. The alphabetical character following LF shows the type of lead-free solder.

  • Page 5: Specifications

    AC cord, Cable clamp (x2), Operation manual As a part of policy of continuous improvement, SHARP reserves the right to make design and specification changes for product improvement without prior notice. The performance specification figures indicated are nominal values of...

  • Page 6: Operation Manual

    LC-20B4U-S LC-20B4U-B OPERATION MANUAL...
  • Page 7 LC-20B4U-S LC-20B4U-B...

  • Page 8: Dimensions

    LC-20B4U-S LC-20B4U-B DIMENSIONS Unit: inch (mm) MENU V/VIDEO MAIN POWER (420) (630) (403.3) (110.7) 3 (76.1) VIDEO (100) AV-IN1 AUDIO VIDEO S-VIDEO AV-IN 2/OUT AUDIO HEAD PHONE COMPONENT ANT. USE THE SUPPLIED AC ADAPTER. (PART NO. LOCATED ON THE MODEL LABEL.)

  • Page 9: Removing Of Major Parts

    LC-20B4U-S LC-20B4U-B REMOVING OF MAJOR PARTS 1. Remove the stand fixing screws (4 pcs.). 2. Remove the two terminal covers. 3. Remove the terminal section fixing screws (2 pcs.). 4. Remove the cabinet B fixing screws (12 pcs.). 5. Remove the cabinet B after opening from the direction of an arrow.
  • Page 10 LC-20B4U-S LC-20B4U-B 9. Remove the inverter-A PWB fixing screws (2 pcs.). 10. Remove the inverter-B PWB fixing screw (1 pc.). 11. Remove the main PWB fixing screws (3 pcs.). 12. Remove the tuner PWB fixing screws (3 pcs.) and detach the chassis frame cover fixing hooks.
  • Page 11 LC-20B4U-S LC-20B4U-B » Precautions in handling the LCD panels 1. Work in a clean room (with humidities below 50%). 2. Be sure to wear an anti-static armband. 3. Handle the panels on an electro-conductive mat. 4. Be careful not to fall, shake and shock the panels.
  • Page 12 LC-20B4U-S LC-20B4U-B Precautions at the time of the side B(back) service of digital unit. 1. Remove only SC2002 of the FFC for connection between Main unit (SC2002) and Tuner unit(SC3403), and con- nect the extended cable (QCNW-A556WJZZ) for service. 2. Remove the FFC for connection between Main unit (SC1204) and LCD panel unit, and connect the extended cable (QCNW-A553WJZZ) for service.

  • Page 13: Adjusting Procedure Of Each Section

    LC-20B4U-S LC-20B4U-B ADJUSTING PROCEDURE OF EACH SECTION The best adjustment is made before shipping. If any position deviation is found or after part replace is performed, adjust as follows. 1. Preparation for Adjustments Use the exclusive-use AC adapter or stable DC power supply.
  • Page 14 LC-20B4U-S LC-20B4U-B 4. Adjustments Adjustment Adjusting conditions Adjusting method 1. Adjust the "B+ Adj" value to 1. Connect the DC voltmeter to B+ Adjustment pin (4) of P3701. 5.0±0.02V with R3714. Make exact (R3714) adjustment of the 5.00V level be- cause it will be the reference for all the other supply voltages.
  • Page 15 LC-20B4U-S LC-20B4U-B Adjustment Adjusting conditions Adjusting method White balance adjustment 1. The upper six items are for other than RCUTOFF Red cut-off adjustment D2, whereas the lower six are for D2. GCUTOFF Green cut-off adjustment BCUTOFF When any of the upper six settings...
  • Page 16 LC-20B4U-S LC-20B4U-B Adjustment Adjusting conditions Adjusting method 1. Call up the adjustment process menu If the wrong data has been sent: PROM data write and get Page 6 displayed on-screen. 1. Initialize the E PROM. (Take the 2. Enter "A40000002681" for the "I special mode setting procedure (1).)
  • Page 17 LC-20B4U-S LC-20B4U-B Test patterns in adjustment process mode [1] IC801 (Video decoder) test patterns 1-1. Getting the test patterns displayed Put the screen in AV1, AV2 or COMPONENT but keep out any signal. Call the adjustment process mode, select "TEST PATTERN" in the 3rd line of VPC 1, make the settings 1 thru 6, and the following test patterns show up.
  • Page 18 LC-20B4U-S LC-20B4U-B Pin functions of microprocessor IC (IC2001) RH-iXA620WJZZQ In Power Saving* Pin No. Name of Terminal Name of Function Function in Normal Times Within 1 min. after Power-OFF by R/C Unit VHOLD1 Vhold For CLOSED CAPTION HLF1 For CLOSED CAPTION P94/DA1/SCL3/RXD2 N.C.
  • Page 19 LC-20B4U-S LC-20B4U-B In Power Saving* Pin No. Name of Terminal Name of Function Function in Normal Times Within 1 min. after Power-OFF by R/C Unit P43/A19 Adjusting process P42/A18 LED_POW Green by TV power supply LED control at "H", and red at "L"...
  • Page 20 LC-20B4U-S LC-20B4U-B Table of Adjusting Process Defaults 1000 order 100 and 10 orders Item Initial Values Min. Value Max. Value Display Content Title No. Page No. ← MODEL A620 Selection of model name (For prevention of malfunction, it is impossible to change it.) →...
  • Page 21 LC-20B4U-S LC-20B4U-B 1000 order 100 and 10 orders Item Initial Values Min. Value Max. Value Display Content Title No. Page No. Equalizer setting 1 (External input) SOUND3 EXT GEQ BAND1 +0.5 -12.0 +12.0 Unit 0.5 Equalizer setting 2 (External input) EXT GEQ BAND2 -1.0...
  • Page 22 LC-20B4U-S LC-20B4U-B 1000 order 100 and 10 orders Item Initial Values Min. Value Max. Value Display Content Title No. Page No. VPC5 PAL-M AVO START 1023 Decimal Horizontal position setting PAL-M SFIF 4095 Decimal Horizontal position setting PAL-M SCINC1 1635...
  • Page 23 LC-20B4U-S LC-20B4U-B 1000 order 100 and 10 orders Item Initial Values Min. Value Max. Value Display Content Title No. Page No. VPC13 PAL60 AVO START 1023 Decimal Horizontal position setting PAL60 SFIF 4095 Decimal Horizontal position setting PAL60 SCINC1 1635...
  • Page 24 LC-20B4U-S LC-20B4U-B 1000 order 100 and 10 orders Item Initial Values Min. Value Max. Value Display Content Title No. Page No. DPS2 N358 TV PKLEVEL Decimal DPS h'7B[7:4] = h'7B[3:0] N358 AV PKLEVEL Decimal DPS h'7B[7:4] = h'7B[3:0] N358 TV PKCORRED7A...
  • Page 25 LC-20B4U-S LC-20B4U-B 1000 order 100 and 10 orders Item Initial Values Min. Value Max. Value Display Content Title No. Page No. DPS8 PAL-M TV LTI Decimal DPS h’77[7:0] PAL-M AV LTI Decimal DPS h’77[7:0] PAL-M TV LMODE79 Decimal DPS h’79[7:0]...
  • Page 26 LC-20B4U-S LC-20B4U-B 1000 order 100 and 10 orders Item Initial Values Min. Value Max. Value Display Content Title No. Page No. DPS14 PAL-N TV BLEMODE Decimal DPS h’74[7:6] PAL-N AV BLEMODE Decimal DPS h’74[7:6] PAL-N TV BGAINREF71 Decimal DPS h’71[7:0]...
  • Page 27 LC-20B4U-S LC-20B4U-B 1000 order 100 and 10 orders Item Initial Values Min. Value Max. Value Display Content Title No. Page No. DPS22 SECAM AV PKLEVEL Decimal DPS h’7B[7:4] = h’7B[3:0] SECAM AV PKCORRED7A Decimal DPS h’7A[7:0] SECAM AV PKCFSOFT7C Decimal DPS h’7C[2:0]...
  • Page 28 LC-20B4U-S LC-20B4U-B 1000 order 100 and 10 orders Item Initial Values Min. Value Max. Value Display Content Title No. Page No. DPS31 N443 AV COLOR Decimal Changes to DPS control (h’88[5:0]) N443 AV TINT +/- decimal Changes to DPS control (h’89[5:0])
  • Page 29 LC-20B4U-S LC-20B4U-B 1000 order 100 and 10 orders Item Initial Values Min. Value Max. Value Display Content Title No. Page No. DPS40 D2 HPRESC FIL42 Decimal DPS h'42[5:0] D2 HSCPRESC 4095 Decimal DPS h'40[7:0],h'41[3:0] D2 HPOSC UPSF60 Decimal DPS h'60[7:6]...
  • Page 30 LC-20B4U-S LC-20B4U-B 1000 order 100 and 10 orders Item Initial Values Min. Value Max. Value Display Content Title No. Page No. DPS45 DPS NLC A6 FF Hexadecimal No title No. DPS NLC A8 FF Hexadecimal (Because DPS NLC AA FF Hexadecimal...
  • Page 31 LC-20B4U-S LC-20B4U-B 1000 order 100 and 10 orders Item Initial Values Min. Value Max. Value Display Content Title No. Page No. OTHERS1 L_ERROR WAIT 30 Decimal + “s” Every 1S (Time taken until error port checking is started) L _ERROR H TIME 1.0s...

  • Page 32: Public Mode Setting Procedure

    LC-20B4U-S LC-20B4U-B PUBLIC MODE SETTING PROCEDURE 1. How to start Public Mode ∫ There are three ways to display the hotel mode setting screen as mentioned below. 1 1) Press the MENU and Sound Vol + keys of the unit and turn ON the power.
  • Page 33 LC-20B4U-S LC-20B4U-B 2. How to exit Public Mode There are several ways to exit the hotel mode setting screen as mentioned below. ∫ Turn OFF the power by power input key. ( ) ∫ Select "ENTER". ( ) ∫ Move the cursor to "RESET" and press the "FLASHBACK" key. (Mode changes to normal mode.) ( ) ...
  • Page 34 LC-20B4U-S LC-20B4U-B 5. On Setting Items (1) MAXIMUM VOLUME Option Adjustable within the range of 1 to 60 (Not looped) Default Function Even when the sound volume is adjusted to higher level, adjusted value does not increase any more. (Unit speaker and headphone) ∫...
  • Page 35 LC-20B4U-S LC-20B4U-B (5) ON SCREEN DISPLAY Option "YES" or "NO" selection (Looped) Default "YES" Function When "NO" is set, OSD display is made invalid. ∫ Messages for V-CHIP BLOCK and CLOSED CAPTION are displayed irrespective of setting. Exception ∫ Checking process, Setting at the time of shipment (including F7-SETUP), adjusting process and hotel mode setting screens should be able to display.
  • Page 36 LC-20B4U-S LC-20B4U-B Specifications of Sound Only Mode Function is should be added during operation of remote control BRIGHT button. " " BRIGHTNESS [Bright] ⇒ BRIGHTNESS [Normal] ⇒ BRIGHTNESS [Dark] ⇒ BRIGHTNESS [OFF] ⇒ BRIGHTNESS [Bright] 2 When mode is selected, the screen is muted, the following message appears and time is counted.
  • Page 37 LC-20B4U-S LC-20B4U-B Table of Key Allocation in Sound Only Mode (Unit keys/Remote control keys) Name of Key Allocation Unit keys POWER Reset TV/VIDEO Temporary recovery MENU Reset Temporary recovery Temporary recovery Remote control POWER In Normal = Reset In Power-ON fixed = Temporary recovery PIC.

  • Page 38: Trouble Shooting Table

    LC-20B4U-S LC-20B4U-B TROUBLE SHOOTING TABLE...
  • Page 39 LC-20B4U-S LC-20B4U-B TROUBLE SHOOTING TABLE (Continued)
  • Page 40 LC-20B4U-S LC-20B4U-B TROUBLE SHOOTING TABLE (Continued)
  • Page 41 LC-20B4U-S LC-20B4U-B TROUBLE SHOOTING TABLE (Continued)

  • Page 42: Chassis Layout

    LC-20B4U-S LC-20B4U-B CHASSIS LAYOUT OPERATION Unit MAIN Unit TUNER Unit R/C, LED Unit...
  • Page 43 LC-20B4U-S LC-20B4U-B INVERTER-A Unit INVERTER-B Unit...

  • Page 44: Block Diagram

    LC-20B4U-S LC-20B4U-B BLOCK DIAGRAM SC3403 AGC,AFT,SAW_SW,MODE 1,MODE 2 TV_V VPC_Y VPC_PB,VPC_PR TUNER SIF AMP TU3201 Q3201,Q3202 V1_V AV1_L,R INPUT VIDEO S-VIDEO SWITCH V_IN INPUT IC3401 IC3502 V2_V IN/OUT AUDIO IN/OUT VIDEO IN/OUT V_IN/OUT AV2_L,R IN/OUT INPUT/OUTPUT SWITCH SWITCH IC3501,Q3501 Q3502-Q3505...
  • Page 45 LC-20B4U-S LC-20B4U-B SC2002 VIDEO CONTROLLER R0~7,G0~7,B0~7 PANEL DECODER (DPS) (VPC) FILTER IC806 IC1201 V0,V7,V21 FL801 V64,V112 FILTER V176,V235 GRADATION FL802 V2V0 V255 POWER 3DYC SYNC SEP IC1101 VCOM IC8201 IC802 CSCOM IC8203 CSYNC VLS,VGL,VEE OSD R/G/B SYNC GSP1,VSH VPC_Y SELECT...

  • Page 46: Overall Wiring Diagram

    LC-20B4U-S LC-20B4U-B OVERALL WIRING DIAGRAM...
  • Page 47 LC-20B4U-S LC-20B4U-B...

  • Page 48: Description Of Schematic Diagram

    LC-20B4U-S LC-20B4U-B DESCRIPTION OF SCHEMATIC DIAGRAM 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.

  • Page 49: Schematic Diagram

    LC-20B4U-S LC-20B4U-B SCHEMATIC DIAGRAM Ë R/C, LED and OPERATION Unit...
  • Page 50 LC-20B4U-S LC-20B4U-B Ë MAIN Unit-1/6...
  • Page 51 LC-20B4U-S LC-20B4U-B...
  • Page 52 LC-20B4U-S LC-20B4U-B Ë MAIN Unit-2/6...
  • Page 53 LC-20B4U-S LC-20B4U-B...
  • Page 54 LC-20B4U-S LC-20B4U-B Ë MAIN Unit-3/6...
  • Page 55 LC-20B4U-S LC-20B4U-B...
  • Page 56 LC-20B4U-S LC-20B4U-B Ë MAIN Unit-4/6...
  • Page 57 LC-20B4U-S LC-20B4U-B...
  • Page 58 LC-20B4U-S LC-20B4U-B Ë MAIN Unit-5/6...
  • Page 59 LC-20B4U-S LC-20B4U-B...
  • Page 60 LC-20B4U-S LC-20B4U-B Ë MAIN Unit-6/6...
  • Page 61 LC-20B4U-S LC-20B4U-B...
  • Page 62 LC-20B4U-S LC-20B4U-B Ë TUNER Unit-1/5...
  • Page 63 LC-20B4U-S LC-20B4U-B...
  • Page 64 LC-20B4U-S LC-20B4U-B Ë TUNER Unit-2/5...
  • Page 65 LC-20B4U-S LC-20B4U-B...
  • Page 66 LC-20B4U-S LC-20B4U-B Ë TUNER Unit-3/5...
  • Page 67 LC-20B4U-S LC-20B4U-B...
  • Page 68 LC-20B4U-S LC-20B4U-B Ë TUNER Unit-4/5...
  • Page 69 LC-20B4U-S LC-20B4U-B...
  • Page 70 LC-20B4U-S LC-20B4U-B Ë TUNER Unit-5/5...
  • Page 71 LC-20B4U-S LC-20B4U-B...
  • Page 72 LC-20B4U-S LC-20B4U-B Ë INVERTER-A Unit...
  • Page 73 LC-20B4U-S LC-20B4U-B Ë INVERTER-B Unit...

  • Page 74: Printed Wiring Board Assemblies

    LC-20B4U-S LC-20B4U-B PRINTED WIRING BOARD ASSEMBLIES MAIN Unit (Side-A)
  • Page 75 LC-20B4U-S LC-20B4U-B TP2001 SC1204 C1227 C1228 C1229 C1230 C1231 C1232 C1233 R837 R841 R836 C851 C852 R1233 R1230 C1219 C831 R1229 C853 IC806 R847 C1214 C1211 R1224 C1204 C1205 C1206 C1207 C1208 R1217 FL802 C820 IC805 C1237 R1122 C818 C1235...
  • Page 76 LC-20B4U-S LC-20B4U-B MAIN Unit (Side-B)
  • Page 77 LC-20B4U-S LC-20B4U-B R1245 C1239 R1243 C1241 R812 R1248 R830 C810 R815 C821 R804 R817 Q804 C825 C823 R824 R1249 D1201 R808 R806 R826 C827 C828 D1202 D1204 D1203 R810 R1250 R1261 R1274 R1201 R1255 R1253 C1248 D1206 R1209 Q1210 R1275...
  • Page 78 LC-20B4U-S LC-20B4U-B R/C, LED Unit (Side-A) D4022 R4023 Q4001 D4012 Q4007 SLD4001 R4024 RMC4002 D4014 D4011 R4029 R/C, LED Unit (Chip Parts Side-A) OPERATION Unit (Side-A) (QPWBSB770WJN2) S4701 OPERATION Unit (Chip Parts Side-A) (QPWBSB770WJN2)
  • Page 79 LC-20B4U-S LC-20B4U-B TUNER Unit (Side-A)
  • Page 80 LC-20B4U-S LC-20B4U-B TP3701 P3604 P3603 P3502 Q3601 FH3704 FH3703 FH3702 FH3701 R3754 Q3709 C3732 R3749 R3745 R3746 C3731 C3730 R3747 C3734 R3744 Q3707 R3737 R3734 C3729 Q3708 TU3201 R3732 L3701 C3722 R3204 C3024 R3206 D370 C3360 C3202 R3203 R3205 J3303...
  • Page 81 LC-20B4U-S LC-20B4U-B P3301 P3602 P3302 P3601 R3351 R3601 R3352 R3350 D3604 R3603 R3602 P3701 C3610 C3608 R3605 R3606 Q3604 D3606 Q3605 R3515 R3610 R3754 D3607 R3761 Q3709 C3607 R3609 C3732 D3608 R3749 R3745 R3742 R3746 C3731 R3743 C3730 R3349 R3347...
  • Page 82 LC-20B4U-S LC-20B4U-B INVERTER-A Unit (Side-A)
  • Page 83 LC-20B4U-S LC-20B4U-B R6722 Q6706 C6712 C6713 T6705 R6710 Q6707 R6727 C6727 D6700 R6705 R6726 R6725 Q6704 R6721 Q6703 R6707 C6708 T6704 R6706 R6704 FH6701 FH6700 T6703 T6702 Q6701 C6702 R6720 Q6702 Q6700 T6701 T6700 INVERTER-A Unit (Chip Parts Side-A)
  • Page 84 LC-20B4U-S LC-20B4U-B INVERTER-B Unit (Side-A)
  • Page 85 LC-20B4U-S LC-20B4U-B T6709 T6708 R6716 T6707 Q6714 R6724 C6740 T6706 D6701 R6715 C6718 R6714 FH6707 FH6706 INVERTER-B Unit (Chip Parts Side-A)

  • Page 86: Replacement Parts List

    4. DESCRIPTION in USA: Contact your nearest SHARP Parts Distributor to order. in CANADA: Contact SHARP Electronics of Canada Limited For location of SHARP Parts Distributor, Please call Toll- Phone (416) 890-2100 Free; 1-800-BE-SHARP MARK: SPARE PARTS-DELIVERY SECTION MARQUE: SECTION LIVRAISON DES PIECES DE RECHANGE Ref.
  • Page 87 LC-20B4U-S LC-20B4U-B Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB767FE03 L1204 VP-1M220J2R9NY J Peaking 22µH L1205 VP-1M220J2R9NY J Peaking 22µH MAIN UNIT (Continued) L1206 VPCGM220M0R5NY J Peaking 22µH L1207 VPCGM220M0R5NY J Peaking 22µH Q1104 VSDTC144EE/-1Y...
  • Page 88 LC-20B4U-S LC-20B4U-B Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB767FE03 C1272 RC-EZA128WJZZY J 1 Electrolytic C1273 VCKYCY1EF104ZY J 0.1 Ceramic MAIN UNIT (Continued) C1274 VCEASH1CN337MY J 330 Electrolytic C1275 RC-KZ0072TAZZY Ceramic C847 VCKYCY1CF224ZY J 0.22...
  • Page 89 LC-20B4U-S LC-20B4U-B Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB767FE03 R1111 VRS-CY1JF103FY J 10k 1/16W Metal Oxide R1112 VRS-CY1JF181JY J 180 1/16W Metal Oxide MAIN UNIT (Continued) R1113 VRS-CY1JF102JY J 1k 1/16W Metal Oxide R1114 VRS-CY1JF181JY...
  • Page 90 LC-20B4U-S LC-20B4U-B Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB767FE03 R8207 VRS-CY1JF561JY J 560 1/16W Metal Oxide R8208 VRS-CY1JF182JY J 1.8k 1/16W Metal Oxide MAIN UNIT (Continued) R8209 VRS-CY1JF911JY J 910 1/16W Metal Oxide R8210 VRS-CY1JF122JY J 1.2k 1/16W Metal Oxide...
  • Page 91 LC-20B4U-S LC-20B4U-B Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB768DE03 D3702 VHDDAN222//-1Y J Diode D3703 VHDRB491D++-1Y J Diode TUNER UNIT D3705 VHDSFPB56//2EY J Diode D3706 VHDSFPB74//2EY J Diode TUNER D3707 VHDSFPB74//2EY J Diode NOTE: THE PARTS HERE SHOWN ARE SUPPLIED AS AN...
  • Page 92 LC-20B4U-S LC-20B4U-B Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB768DE03 C3711 VCKYCY1HB562KY J 5600p 50V Ceramic C3712 RC-KZ1025CEZZY Ceramic TUNER UNIT (Continued) C3713 VCAAPD1CJ396MY J 39 Electrolytic C3714 VCKYCY1HB562KY J 5600p 50V Ceramic C3338 RC-KZA041WJZZY J 10...
  • Page 93 LC-20B4U-S LC-20B4U-B Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB768DE03 R3531 VRS-TQ2BD680JY J 68 1/8W Metal Oxide R3532 VRS-CY1JF000JY 1/16W Metal Oxide TUNER UNIT (Continued) R3533 VRS-CY1JF680JY J 68 1/16W Metal Oxide R3534 VRS-CY1JF101JY J 100 1/16W Metal Oxide...

  • Page 94: Operation Unit

    LC-20B4U-S LC-20B4U-B Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB768DE03 DUNTKB769DE03 TUNER UNIT (Continued) R/C, LED UNIT TRANSISTORS R3757 VRS-TW2ED000JY J 0 1/4W Metal Oxide R3760 VRS-TW2ED470JY J 47 1/4W Metal Oxide Q4001 VSDTC144EE/-1Y J DTC144EE...
  • Page 95 LC-20B4U-S LC-20B4U-B Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB590DE03 DUNTKB591DE03 INVERTER-A UNIT INVERTER-B UNIT TRANSISTORS TRANSISTORS Q6700 VS2SC5886++-1Y J 2SC5886 Q6709 VS2SC5886++-1Y J 2SC5886 Q6701 VS2SC5886++-1Y J 2SC5886 Q6710 VS2SC5886++-1Y J 2SC5886 Q6702 VS2SA1530AR-1Y...

  • Page 96: Cabinet And Mechanical Parts

    J Cabinet B Ass’y GCOVA2028CEKC J Terminal Cover(L) (LC-20B4U-B) Not Available – Cabinet B — (LC-20B4U-B) HiNDPA404WJSA J Model Label(LC-20B4U-S) AG GCOVA2038CEKC J Terminal Cover(S) HiNDPA406WJSA J Model Label(LC-20B4U-B) AG (LC-20B4U-S) TCAUH3096CESA J Caution Label(LC-20B4U-S) AE GCOVA2038CEKC J Terminal Cover(S)
  • Page 97 LC-20B4U-S LC-20B4U-B CABINET AND MECHANICAL PARTS OPERATION PWB INVERTER-A PWB 1-10 1-14 MAIN PWB 1-11 1-13 INVERTER-B 1-10 1-14 1-13 1-12 1-15 R/C, LED PWB TUNER PWB 5-2-1 5-18 5-2-3 5-19 5-10 5-2-2 5-14 5-15 5-16 5-20 5-13 5-12 5-18...

  • Page 98: Packing Parts

    Ref. No. Part No. Description Code PACKING PARTS SUPPLIED ACCESSORIES (NOT REPLACEMENT ITEM) LHLDWA002WJSA J Cable Clamp, x2 SPAKCA663WJZZ – Packing Case(LC-20B4U-S) — (LC-20B4U-S) SPAKCA665WJZZ – Packing Case(LC-20B4U-B) — LHLDWA002WJSB J Cable Clamp, x2 SPAKFA258WJZZ – Buffer Material(Accessories) — (LC-20B4U-B) SPAKPA209WJZZ –...

  • Page 99: Packing Of The Set

    LC-20B4U-S LC-20B4U-B PACKING OF THE SET Operation Manual (TiNS-A691WJZZ) Polyethylene Bag Cable Clamp (2 pcs.) (SSAKA0160CEZZ) (LHLDWA002WJSA:LC-20B4U-S) (LHLDWA002WJSB:LC-20B4U-B) Questionnaire Card (TCADEA028WJZZ) AC Cord "AAA" size Battery (2 pcs.) (QACCD3097CEPA AC Adapter (UADP-0243CEPZ) Antenna Cable Wrapping Paper (QCNWG0003CEPA) (SPAKPA209WJZZ) Infrared R/C Unit...
  • Page 100 LC-20B4U-S LC-20B4U-B COPYRIGHT © 2003 BY SHARP CORPORATION ALL RIGHTS RESERVED. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of the publisher.

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