LC-20B4U-S LC-20B4U-B SERVICE MANUAL S43Z5LC-20B4U LCD COLOR TELEVISION MODELS LC-20B4U-S LC-20B4U-B 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. CONTENTS Page » » » » » » » » » » » » » » » » IMPORTANT SERVICE SAFETY PRECAUTION ........................................................................................ 2 SPECIFICATIONS ....................
LC-20B4U-S LC-20B4U-B IMPORTANT SERVICE SAFETY PRECAUTION Ë Service work should be performed only by qualified service technicians who are thoroughly familiar with all safety checks and the servicing guidelines which follow: • Use an AC voltmeter having with 5000 ohm per volt, or higher, sensitivity or measure the AC voltage drop across the resistor.
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 terre. • Utiliser un voltmètre CA d'une sensibilité d'au moins 5000Ω/V pour mesurer la chute de tension en travers de la résistance.
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. Example: LFa Indicates lead-free solder of tin, silver and copper. 2 Using lead-free wire solder When fixing the PWB soldered with the lead-free solder, apply lead-free wire solder.
LC-20B4U-S LC-20B4U-B SPECIFICATIONS Items Model LCD panel Number of dots Video color systems Destination TV Standard (CCIR) TV function TV Tuning System STEREO CATV Y/C FILTER Brightness Lamp life (Fluorescent lamp) Viewing angles Audio amplifier Speakers AV-IN1 AV-IN2 Terminals COMPONENT Antenna Headphone OSD language Power supply Weight Accessories LC-20B4U 19.
CH MENU TV/VIDEO 6 To change the vertical angle of the LCD TV set, tilt the screen up to 5 degrees forward or 10 degrees backward. The TV set can also be rotated 25 degrees to right and left. Adjust the angle so that the TV set can be watched most comfortably. The SLEEP indicator lights up red when the SLEEP TIMER is set. SLEEP indicator Speaker (Right) MAIN POWER • TV/VIDEO, CH ( )/( ), VOL ( – )/( + ), and MENU on the main unit have the same functions as the same buttons on the remote control.
9 8 6 7 5 2 3 4 1 SLEEP POWER VOL MUTE PIC. FLIP CH FLASHBACK BRIGHT TV/VIDEO MENU ENTER DISPLAY 15 13 14 12 11 10 / / / (Cursor control) Select a desired item on the screen. 7 Set the channel. 15 Channel Select Return to the previous channel. 14 FLASHBACK Display the menu screen. 13 MENU Select a Liquid Crystal Television input source. 12 TV/VIDEO 11 Set the orientation of the picture. 10 PIC. FLIP Select audio settings. 9 MTS Select channel.
LC-20B4U-S LC-20B4U-B DIMENSIONS CH T MENU V/VIDEO MAIN POWER 1617/32 (420) 3 / (90) / (1) 35 64 3 15/16 (100) 21/64 (51.5) 1 32 4 23/64 (110.7) 3 (76.1) AV-IN 2/OUT L AUDIO R COMPONENT Y PB VIDEO AV-IN1 L AUDIO R S-VIDEO HEAD PHONE ANT. PR USE THE SUPPLIED AC ADAPTER. (PART NO. LOCATED ON THE MODEL LABEL.) L POWER INPUT DC12V AUDIO R 1 32 / (1) 18 33/64 (470.3) VIDEO 315/16 (100) 9 53/64 (249.6) 8 15 1/64 (381.5) 11 27/32 (300.8) 7 /64 (193.5) 15 7/8 (403.
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. 6. Remove the reinforcement angle fixing screws (4 pcs.). 7. Release the wire holder at 2 location and peel off the tape. 4 8. Detach the connector from each PWB.
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. 13. Remove the R/C, LED PWB fixing screws (2 pcs.). 14. Remove the operation PWB fixing screws (2 pcs.).
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. 15. 16. 17. 18. 19. 20. Remove the LCD panel unit fixing screws (4 pcs.). Remove the ITO earth spring fixing screw (1 pc.). Remove the reflection/deflection, prism, diffusion, ITO sheets and diffusion panel.
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 connect 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. 3.
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. AC adapter: UADP-0243CEPZ DC power supply: 13 ± 0.5V 2. Special mode setting procedure (1)After initialization of E2PROM the mode is changed to the adjustment mode.
LC-20B4U-S LC-20B4U-B 4. Adjustments Adjustment Adjusting conditions Adjusting method 1 B+ Adjustment (R3714) 1. Connect the DC voltmeter to pin (4) of P3701. 1. Adjust the "B+ Adj" value to 5.0±0.02V with R3714. Make exact adjustment of the 5.00V level because it will be the reference for all the other supply voltages. Be sure to make this adjustment together with the main PWB (digital PWB). During the adjustment, be also careful not to allow the voltage at pin (2) of P3701 to go above 5.3 V.
LC-20B4U-S LC-20B4U-B Adjustment 5 6 Adjusting conditions Adjusting method White balance adjustment 1. The upper six items are for other than D2, whereas the lower six are for D2. When any of the upper six settings has been modified, the equivalent item in the lower six has the same setting. Now the D2 settings can be finely readjusted. Checking and modifying the settings adjustment (If E2PROM is replaced) Go to the adjustment mode and check the following settings. Ver.1.
LC-20B4U-S LC-20B4U-B Adjustment 7 E2PROM data write Adjusting conditions Adjusting method 1. Call up the adjustment process menu If the wrong data has been sent: and get Page 6 displayed on-screen. 1. Initialize the E 2 PROM. (Take the special mode setting procedure (1).) 2. Enter "A40000002681" for the "I2C DATA" item in Line 1. 2. Take the adjustment steps 2 thru 7. 3. Move the cursor to the "I 2C DATA" item in Line 2 and carry out "SEND" with the right cursor key. 5.
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. 1-2.
LC-20B4U-S LC-20B4U-B Pin functions of microprocessor IC (IC2001) RH-iXA620WJZZQ In Power Saving* Pin No. Name of Terminal I/O Within 1 min.
LC-20B4U-S LC-20B4U-B In Power Saving* Pin No. Name of Terminal I/O Within 1 min.
LC-20B4U-S LC-20B4U-B Table of Adjusting Process Defaults 1000 order 100 and 10 orders Title No. Page No. 0 1 Item MODEL INCH SIZE ERROR NO RESET PUBLIC MODE V-CHIP CANADIAN VCHIP EXT CONTROL VPC SHARPNESS Initial Values Min. Value Max. Value Content ← A620 20 0 OFF 1 OFF OFF ON Display 0 → 5 → → → → → 13/15/20 Decimal ON/OFF 1/2 ON/OFF ON/OFF ON/OFF Selection of model name (For prevention of malfunction, it is impossible to change it.
LC-20B4U-S LC-20B4U-B 1000 order 100 and 10 orders Title No. Page No. 1 SOUND3 EXT GEQ BAND1 EXT GEQ BAND2 EXT GEQ BAND3 EXT GEQ BAND4 EXT GEQ BAND5 TV GEQ BAND1 TV GEQ BAND2 TV GEQ BAND3 TV GEQ BAND4 TV GEQ BAND5 +0.5 -1.0 -0.5 +1.0 -2.5 +0.5 -1.0 -0.5 +1.0 -2.
LC-20B4U-S LC-20B4U-B 1000 order 100 and 10 orders Title No. Page No.
LC-20B4U-S LC-20B4U-B 1000 order 100 and 10 orders Title No. Page No.
LC-20B4U-S LC-20B4U-B 1000 order 100 and 10 orders Title No. Page No.
LC-20B4U-S LC-20B4U-B 1000 order 100 and 10 orders Title No. Page No.
LC-20B4U-S LC-20B4U-B 1000 order 100 and 10 orders Title No. Page No.
LC-20B4U-S LC-20B4U-B 1000 order 100 and 10 orders Title No. Page No.
LC-20B4U-S LC-20B4U-B 1000 order 100 and 10 orders Title No. Page No.
LC-20B4U-S LC-20B4U-B 1000 order 100 and 10 orders Title No. Page No. 3 DPS40 D2 HPRESC FIL42 D2 HSCPRESC D2 HPOSC UPSF60 D2 HSCPOSC D2 VSCPOSC 4E D2 VSCPOSC 4F D2 VSCPOSC 50 D2 VOFPOSC D2 VPOSC UPSF60 D2 PPLOP D2 PPLOP REF. 3 DPS41 3 3 Item Initial Values Min. Value Max.
LC-20B4U-S LC-20B4U-B 1000 order 100 and 10 orders Title No. Page No. No title No. DPS45 DPS NLC A6 DPS NLC A8 DPS NLC AA DPS NLC AC DPS NLC AE DPS NLC B0 DPS NLC B2 DPS NLC B4 DPS NLC B6 DPS NLC B8 DPS NLC BA DPS NLC BC DPS NLC BE DPS NLC C0 DPS NLC C2 DPS NLC C4 DPS NLC C6 DPS NLC C8 DPS NLC CA DPS NLC CC DPS NLC CE DPS NLC D0 DPS NLC D2 DPS NLC D4 4 DAC1 4 Item Initial Values Min. Value Max.
LC-20B4U-S LC-20B4U-B 1000 order 100 and 10 orders Title No. Page No. 6 OTHERS1 L_ERROR WAIT L _ERROR H TIME 15s 1.0s 0 0 TV GAIN TV OSD NTSC PWM FREQ NTSC PWM DUTY PALPW FREQ PAL PWM DUTY CLOSED CAPTION CCD ISO EZ SETUP OFF -27 9CB 0 9CB 0 15 16 ON -50 000 0 000 0 1 0 Item Initial Values Min. Value Max. Value Display Content 30 Decimal + “s” 4 Unit 0.
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. 2) Display the password input screen. Operating procedure ∫ Set the initial input position at the left end digit. ∫ Make it possible to accept the input by the numeric keys of the remote control 1 thru 9 , and 0 and prohibit the input by other keys than these.
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.) (✩) ★ ... "PUBLIC MODE" of the adjusting process is held ON. ✩ ... Set values are reset to the initial values. 3.
LC-20B4U-S LC-20B4U-B 5. On Setting Items (1) MAXIMUM VOLUME Option Default Function Exception Remarks Adjustable within the range of 1 to 60 (Not looped) 60 Even when the sound volume is adjusted to higher level, adjusted value does not increase any more. (Unit speaker and headphone) ∫ In adjusting process, it is possible to set any sound volume by VOLUME irrespective of this setting. ∫ In line output, it is possible to set the sound volume within the range of -60 to 0 irrespective of adjusted value.
LC-20B4U-S LC-20B4U-B (5) ON SCREEN DISPLAY "YES" or "NO" selection (Looped) "YES" When "NO" is set, OSD display is made invalid. ∫ Messages for V-CHIP BLOCK and CLOSED CAPTION are displayed irrespective of setting. ∫ Checking process, Setting at the time of shipment (including F7-SETUP), adjusting process and hotel mode setting screens should be able to display.
LC-20B4U-S LC-20B4U-B Specifications of Sound Only Mode Function 1 "OFF" is should be added during operation of remote control BRIGHT button. BRIGHTNESS [Bright] ⇒ BRIGHTNESS [Normal] ⇒ BRIGHTNESS [Dark] ⇒ BRIGHTNESS [OFF] ⇒ BRIGHTNESS [Bright] 2 When "OFF" mode is selected, the screen is muted, the following message appears and time is counted. (Sound only mode entry process) At this time, the display of time "After 5 seconds" in the message changes every second as the time is counted.
LC-20B4U-S LC-20B4U-B Table of Key Allocation in Sound Only Mode (Unit keys/Remote control keys) Name of Key Unit keys Remote control Allocation Reset Temporary recovery Reset Temporary recovery Temporary recovery In Normal = Reset In Power-ON fixed = Temporary recovery Reset Temporary recovery * It is recovered by call + irrespective of the state at the start of sound only mode.
Check IC806 and its peripheral circuits. Check the IC806 signal input line. No Check the related lines, IC806 itself and its peripheral circuits. Are the waveforms at pins (8), (9), 26), and (27) of IC1201 as specified? Yes No No Check IC1201 and its peripheral circuits as well as the LCD panel voltage and waveform. Check the IC806 signal output line, IC806 itself and its peripheral circuits.
Are inputs and outputs of IC806 as specified? Yes No Check IC3401 and its peripheral parts. Check IC806 and its peripheral circuits. Does the video decoder No test pattern appear? Yes Check IC1201, its peripheral circuits and the LCD panel. Does the LCD controller test No pattern appear? No picture at all No 39 Check IC3401 and its peripheral parts.
No No Check SC OUT1LINE and IC8201, Q8206, FL8206, IC8203, Q8202 No No S-VIDEO color No color Check S4701 and connection cable. Replace F3701 and F3702. Check SC3405, SC line and peripheral parts. No Is input at Pin (72) of IC806 as specified? No No No Interlace No COMPONENT color Replace the fluorescent lamp and check the oscillation waveform again.
Check the speakers and their peripheral parts. Yes Are inputs at pins (2) and (4) as well as outputs at pins (8) and (12), all of IC3305, as specified? Yes Are outputs at pins (1) and (7) of IC3301/ IC3302/IC3303 as specified? Yes Are input and output of IC3304 as specified? Yes Is pin (53) of IC2001 at “L”? No sound from speakers No No No No Check the line in question, IC3301 and its peripheral parts. Check IC3301, IC3302, IC3303 and their peripheral parts.
LC-20B4U-S LC-20B4U-B CHASSIS LAYOUT OPERATION Unit H MAIN Unit G F E TUNER Unit D C B R/C, LED Unit A 1 2 3 4 5 6 42 7 8 9 10
LC-20B4U-S LC-20B4U-B INVERTER-A Unit INVERTER-B Unit 10 11 12 13 14 15 43 16 17 18 19
LC-20B4U-S LC-20B4U-B BLOCK DIAGRAM SC3403 AGC,AFT,SAW_SW,MODE 1,MODE 2 SC H VPC_Y VPC_PB,VPC_PR TV_V TUNER TU3201 SIF AMP Q3201,Q3202 SIF FI F FI F V1_V AV1_L,R AV1 INPUT G S-VIDEO SY VIDEO SC SWITCH V_IN IC3401 INPUT AMP IC3502 F V2_V IN/OUT AV2 AV2_L,R IN/OUT INPUT/OUTPUT AUDIO IN/OUT VIDEO IN/OUT SWITCH IC3501,Q3501 Q3502-Q3505 AV2_R,L SC1_OUT_R,L Y,PB,PR COMPONENT S_IN/OUT AUDIO DL,DR INPUT V_IN/OUT SWITCH DECODER E OFL REVERSE OFL1 Q3601 (MSP) Q8451~Q8456 IC330
LC-20B4U-S LC-20B4U-B 03 SC2002 I2C VDP LCD CONTROLLER (DPS) IC1201 VIDEO DECODER (VPC) IC806 FILTER FL801 REV FILTER FL802 GRADATION POWER IC1101 V2V0 3DYC IC8201 SYNC SEP V0,V7,V21 V64,V112 V176,V235 V255 VCOM CSCOM IC802 AMP IC8203 LCD PANEL R0~7,G0~7,B0~7 CSYNC VLS,VGL,VEE OSD R/G/B I2C VPC_Y C.C SYNC GSP1,VSH SELECT GBLR,GCK POWER IC807 E2PROM GSP2 IC2010 MICON IC2001 RESET HDP IC2006 L1 SSTBY YP,CPB,CPR HDP,VDP 01 P1201 YP,CPB,CPR,HDP,VDP YP VDP,HDP 3.3V REG 3.
LC-20B4U-S LC-20B4U-B OVERALL WIRING DIAGRAM H G F E D C B A 1 2 3 4 5 6 46 7 8 9 10
LC-20B4U-S LC-20B4U-B 10 11 12 13 14 15 47 16 17 18 19
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. INDICATION OF RESISTOR & CAPACITOR: RESISTOR 1. The unit of resistance “Ω” is omitted. (K=kΩ=1000 Ω, M=MΩ). 2. All resistors are ± 5%, unless otherwise noted.
LC-20B4U-S LC-20B4U-B SCHEMATIC DIAGRAM Ë R/C, LED and OPERATION Unit H G F E D C B A 1 2 3 4 49 5 6
LC-20B4U-S LC-20B4U-B Ë MAIN Unit-1/6 H G F E D C B A 1 2 3 4 5 6 50 7 8 9 10
LC-20B4U-S LC-20B4U-B 10 11 12 13 14 15 51 16 17 18 19
LC-20B4U-S LC-20B4U-B Ë MAIN Unit-2/6 H G F E D C B A 1 2 3 4 5 6 52 7 8 9 10
LC-20B4U-S LC-20B4U-B 10 11 12 13 14 15 53 16 17 18 19
LC-20B4U-S LC-20B4U-B Ë MAIN Unit-3/6 H G F E D C B A 1 2 3 4 5 6 54 7 8 9 10
LC-20B4U-S LC-20B4U-B 10 11 12 13 14 15 55 16 17 18 19
LC-20B4U-S LC-20B4U-B Ë MAIN Unit-4/6 H G F E D C B A 1 2 3 4 5 6 56 7 8 9 10
LC-20B4U-S LC-20B4U-B 10 11 12 13 14 15 57 16 17 18 19
LC-20B4U-S LC-20B4U-B Ë MAIN Unit-5/6 H G F E D C B A 1 2 3 4 5 6 58 7 8 9 10
LC-20B4U-S LC-20B4U-B 10 11 12 13 14 15 59 16 17 18 19
LC-20B4U-S LC-20B4U-B Ë MAIN Unit-6/6 H G F E D C B A 1 2 3 4 5 6 60 7 8 9 10
LC-20B4U-S LC-20B4U-B 10 11 12 13 14 15 61 16 17 18 19
LC-20B4U-S LC-20B4U-B Ë TUNER Unit-1/5 H G F E D C B A 1 2 3 4 5 6 62 7 8 9 10
LC-20B4U-S LC-20B4U-B 10 11 12 13 14 15 63 16 17 18 19
LC-20B4U-S LC-20B4U-B Ë TUNER Unit-2/5 H G F E D C B A 1 2 3 4 5 6 64 7 8 9 10
LC-20B4U-S LC-20B4U-B 10 11 12 13 14 15 65 16 17 18 19
LC-20B4U-S LC-20B4U-B Ë TUNER Unit-3/5 H G F E D C B A 1 2 3 4 5 6 66 7 8 9 10
LC-20B4U-S LC-20B4U-B 10 11 12 13 14 15 67 16 17 18 19
LC-20B4U-S LC-20B4U-B Ë TUNER Unit-4/5 H G F E D C B A 1 2 3 4 5 6 68 7 8 9 10
LC-20B4U-S LC-20B4U-B 10 11 12 13 14 15 69 16 17 18 19
LC-20B4U-S LC-20B4U-B Ë TUNER Unit-5/5 H G F E D C B A 1 2 3 4 5 6 70 7 8 9 10
LC-20B4U-S LC-20B4U-B 10 11 12 13 14 15 71 16 17 18 19
LC-20B4U-S LC-20B4U-B Ë INVERTER-A Unit H G F E D C B A 1 2 3 4 72 5 6
LC-20B4U-S LC-20B4U-B Ë INVERTER-B Unit H G F E D C B A 1 2 3 4 73 5 6
LC-20B4U-S LC-20B4U-B PRINTED WIRING BOARD ASSEMBLIES H G F E D C B A MAIN Unit (Side-A) 1 2 3 4 74 5 6
LC-20B4U-S LC-20B4U-B H R1235 R1242 R1232 C1220 R1228 C1218 C1217 SC1203 R1227 C1215 R1225 FB1201 R1226 C1243 R1120 C1235 SC1202 R1116 C1274 C1210 C1209 R1222 X1201 C1213 C1212 R1223 R1221 R1211 R1260 C1103 D1104 C1104 R1101 C1106 C1107 IC1101 C1101 C1110 C1109 C1102 R1103 R1102 C1108 C1105 C726 R706 R705 R8249 R8224 R8213 R8209 R8216 C8221 C8209 R8217 R8202 R8205 R8210 R8248 R2006 P2001 C8211 R8247 Q8205 R8221 Q8206 X8201 R8246 L8204 C8253 FDC001 Q8210
LC-20B4U-S LC-20B4U-B H G F E D C B A MAIN Unit (Side-B) 1 2 3 4 76 5 6
1 TL2003 2 3 77 4 C8226 5 TL1205 C824 R712 C704 R704 R2093 R2096 C706 IC701 Q2010 C1250 R802 Q8204 IC2003 C2004 C2022 R2051 R2090 TL2057 C716 TL710 R714 TL711 R863 R1207 C1249 R1257 R1202 TL1286 TL801 R866 C804 TL1211 TL1285 R1201 R2099 R1258 R820 R808 R825 R814 C834 C832 C823 R810 TL1283 TL1207 TL1206 R829 C817 R819 IC804 C816 TL1291 Q807 TL1203 C821 C825 TL1210 TL1209 C805 TL1208 IC807 TL2041 R2007 R1209 R804 TL2040 C8231 C8214 C828 TL2039 D2
LC-20B4U-S LC-20B4U-B H R/C, LED Unit (Side-A) R4021 C4018 G R4023 SLD4001 D4015 P4004 D4012 R4024 R4029 RMC4002 Q4001 Q4007 R4001 Q4003 D4022 D4014 D4011 F R/C, LED Unit (Chip Parts Side-A) E D OPERATION Unit (Side-A) (QPWBSB770WJN2) SW4008 SW4007 R4005 R4006 SW4002 SW4003 R4011 R4012 SW4004 SW4006 D4008 D4009 S4701 P4001 B D4010 C OPERATION Unit (Chip Parts Side-A) (QPWBSB770WJN2) A 1 2 3 4 78 5 6
LC-20B4U-S LC-20B4U-B H G F E D C B A TUNER Unit (Side-A) 1 2 3 4 79 5 6
LC-20B4U-S LC-20B4U-B TP3701 P3603 P3604 J3701 R3518 Q3601 R3519 P3502 H P FH3701 R3750 FH3702 R3754 Q3709 C3732 R3749 R3746 R3745 R37 C3730 C3731 Q3707 R3737 IC3702 C3733 R3748 R37 R3734 Q3708 R3521 C3729 R3731 R3752 R3751 R3753 R3719 Q3 R3707 R3755 D3711 C3735 G R3744 R3738 R3740 R3747 C3734 Q3701 D3701 FH3703 FH3704 C3307 TU3201 F C3 R3732 L C3714 L3701 FB3 IC3303 R3375 R3377 C3311 R3322 R3321 R3319 C3313 R3378 C3309 R3331 R3327 Q3306 C3713 C3717 R3
LC-20B4U-S LC-20B4U-B P3301 P3602 P3302 P3601 C3603 D3601 C3328 C3329 R3432 R8460 R8465 R8462 R8457 J3404 C8458 C8457 R8458 C8455 C8456 R8454 R8455 R8453 R3433 R8452 C8451 R8451 R3430 C3719 R3724 C3724 R3756 C3711 D3709 C8452 Q8451 R3736 FB3708 FB3702 C8453 C3737 L3703 Q8452 C8454 R3729 C3713 Q8453 D3707 C3715 C3723 FB3707 FB3709 C3714 T3701 D3705 R8461 R8459 R8456 P8401 Q8454 C8463 C8433 C3718 L8402 D3706 C3722 C8460 R3429 L3702 FB3703 R3431 Q845
LC-20B4U-S LC-20B4U-B H G F E D C B A INVERTER-A Unit (Side-A) 1 2 3 4 82 5 6
LC-20B4U-S LC-20B4U-B H FDC4 FH6704 R6708 R6722 Q6708 Q6706 C6712 T6705 R6709 R6711 C6713 R6710 FH6705 Q6707 R6727 R6726 R6725 P6702 C6727 L6704 D6700 G R6705 P6705 Q6704 Q6705 C6714 C6726 R6721 Q6703 FH6702 R6707 C6708 R6706 T6704 C6707 C6709 R6704 L6702 F FH6703 FH6701 FH6700 T6703 E P6701 T6702 C6704 D R6701 C6702 Q6701 R6700 C6703 R6703 R6702 R6720 Q6702 Q6700 C6725 L6700 C P6700 T6701 B FDC1 T6700 A INVERTER-A Unit (Chip Parts Side-A) 1 2 3 4
LC-20B4U-S LC-20B4U-B H G F E D C INVERTER-B Unit (Side-A) B A 1 2 3 4 84 5 6
LC-20B4U-S LC-20B4U-B H P6704 G T6709 C6741 F T6708 Q6712 Q6713 C6722 R6716 R6717 L6708 E P6703 C6723 R6718 R6719 FH6708 D T6707 Q6714 R6724 C6740 C6724 Q6710 Q6709 FH6709 R6713 R6723 C6717 L6706 Q6711 D6701 R6712 C6719 R6728 R6729 R6715 C6718 R6714 P6706 C T6706 FH6707 FH6706 INVERTER-B Unit (Chip Parts Side-A) B A 1 2 3 4 85 5 6
LC-20B4U-S LC-20B4U-B Ref. No. Part No. ★ Description Code Ref. No. ★ Part No. Description Code PARTS LIST LISTE DES PIECES PARTS REPLACEMENT CHANGE DES PIECES Replacement parts which have these special safety characteristics identified in this manual; electrical components having such features are identified by å and shaded areas in the Replacement Parts Lists and Schematic Diagrams.
LC-20B4U-S LC-20B4U-B Ref. No. ★ Part No. Description Code Ref. No.
LC-20B4U-S LC-20B4U-B Ref. No. Part No. ★ Description Code Ref. No.
LC-20B4U-S LC-20B4U-B Ref. No. ★ Part No. Description Code Ref. No.
LC-20B4U-S LC-20B4U-B Ref. No. Part No. ★ Description Code Ref. No.
LC-20B4U-S LC-20B4U-B Ref. No. ★ Part No. Description Code Ref. No. DUNTKB768DE03 TUNER UNIT TUNER NOTE: THE PARTS HERE SHOWN ARE SUPPLIED AS AN ASSEMBLY BUT NOT INDEPENDENTLY.
LC-20B4U-S LC-20B4U-B Ref. No. Part No. ★ Description Code Ref. No.
LC-20B4U-S LC-20B4U-B Ref. No. Part No. ★ Description Code Ref. No.
LC-20B4U-S LC-20B4U-B Ref. No. R3757 R3760 R3762 R3765 R8451 R8452 R8453 R8454 R8455 R8456 R8457 R8458 R8459 R8460 R8461 R8462 R8463 R8464 R8465 R8466 R8467 R8468 Part No. ★ Description Code Ref. No.
LC-20B4U-S LC-20B4U-B Ref. No. ★ Part No. Description Code Ref. No.
LC-20B4U-S LC-20B4U-B Ref. No. Part No. ★ Description Code Ref. No.
LC-20B4U-S LC-20B4U-B CABINET AND MECHANICAL PARTS 27 H 24 4-1 4 11 4-3 4-2 4-6 4-4 4-5 OPERATION PWB D 1-4 27 G INVERTER-A PWB 1-7 1-14 1-10 1-6 26 1-9 MAIN PWB 1-4 1-5 1-11 1-8 INVERTER-B PWB 1-10 1-14 1-13 1-9 26 15 19 1-12 F 21 1-8 1-15 16 1-4 1-5 E 26 17 18 1-7 1-6 1-4 1-13 20 D 27 R/C, LED PWB 15 8 26 27 1-3 12 1-2 9 TUNER PWB 22 5-2-1 1-1 E 5-2 1 E 5-8 13 5-5 5 5-18 5-3 5-9 5-2-3 5-19 5-10 D 5-2-2 5-1 23 3-3 5-14 5-15 5-4 3 5-5 5-
LC-20B4U-S LC-20B4U-B Ref. No. Part No. ★ Description Code Ref. No.
LC-20B4U-S LC-20B4U-B PACKING OF THE SET Operation Manual (TiNS-A691WJZZ) Cable Clamp (2 pcs.) (LHLDWA002WJSA:LC-20B4U-S) (LHLDWA002WJSB:LC-20B4U-B) Questionnaire Card (TCADEA028WJZZ) ★ "AAA" size Battery (2 pcs.
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. TQ1552-S May 2003 Printed in Japan Design and Production Information Design : Japan Production : Japan MI.
