Sharp LC-20B4U-B Service Manual Download Page 5 | Manualshive

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LC-20B4U-S
LC-20B4U-B

SPECIFICATIONS

Items

LCD panel

19.7” Advanced Super View & BLACK TFT LCD

Number of dots

921,600 dots VGA

Video color systems

N358, N443, PAL, PAL-M, PAL-N, SECAM, PAL-60

Destination

USA/Latin America/Taiwan

TV Standard (CCIR)

NTSC/PAL-M/PAL-N

TV function

TV Tuning System

PLL 181 ch.

STEREO

MTS+SAP

CATV

125 ch.

Y/C FILTER

3D Y/C FILTER

Brightness

430 cd/m

2

Lamp life (Fluorescent lamp)

60,000 hours

Viewing angles

H: 170

°

V: 170

°

Audio amplifier

2.5 W

×

2

Speakers

ø2 in. (ø5 cm)

,

2 pcs.

AV-IN1

AV-IN1, S-VIDEO-IN

AV-IN2

AV-IN2/AV-OUT

Terminals

COMPONENT

COMPONENT-IN, AUDIO-IN

Antenna

F-Type

Headphone

Mini-jack for stereo (ø3.5 mm)

OSD language

English/French/Spanish

Power supply

DC 13V, AC 110-240V, 50/60Hz

Weight

19.2 lbs. (8.7 kg), w/o accessories

Accessories

Remote control, Battery (x2), Antenna cable, AC adapter,
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
production units. There may be some deviations from these values in individual units.

Model

LC-20B4U

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Summary of Contents for LC-20B4U-B

Page 1: ...r sales service only The contents are subject to change without notice LCD COLOR TELEVISION CONTENTS 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 DI...

Page 2: ...ement 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 safety checks 1 Inspect all lead dress to make certain that leads are not pinched and c...

Page 3: ... ce manuel peut provoquer des électrocutions incendies radiations X ou autres accidents AVERTISSEMENT 1 N entreprendre aucune modification de tout circuit C est dangereux 2 Débrancher le récepteur avant toute réparation VERIFICATIONS CONTRE L INCEN DIE ET LE CHOC ELECTRIQUE Avant de rendre le récepteur à l utilisateur effectuer les vérifications suivantes 1 Inspecter tous les faisceaux de câbles p...

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: ...s AV IN1 AV IN1 S VIDEO IN AV IN2 AV IN2 AV OUT Terminals COMPONENT COMPONENT IN AUDIO IN Antenna F Type Headphone Mini jack for stereo ø3 5 mm OSD language English French Spanish Power supply DC 13V AC 110 240V 50 60Hz Weight 19 2 lbs 8 7 kg w o accessories Accessories Remote control Battery x2 Antenna cable AC adapter AC cord Cable clamp x2 Operation manual As a part of policy of continuous impr...

Page 6: ...at the TV set can be watched most comfortably Speaker Left POWER indicator A green indicator lights when the power is on and a red indicator lights when in the standby mode the indicator will not light when the main power is off Controls Remote control sensor VID EO AU DIO L Y P B P R R AU DIO L R CO MP ON EN T AV IN 2 O UT AN T VID EO S V IDE O AU DIO L R HE AD PH ON E PO WE R INP UT DC 13 V AV I...

Page 7: ...Crystal Television input source 13 MENU Display the menu screen 14 FLASHBACK Return to the previous channel 15 Channel Select Set the channel 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Batteries for the Remote Control Before using the LCD TV set for the first time install two AAA size UM SUM 4 batteries supplied When the batteries become depleted and the remote control fails to operate replace the batter...

Page 8: ... L R AUDIO L PR PB Y CH VOL T V VIDEO MENU MAINPOWER USE THE SUPPLIED AC ADAPTER PART NO LOCATED ON THE MODEL LABEL 2 11 16 68 6 18 9 16 471 5 11 27 32 300 8 15 1 64 381 5 7 39 64 193 5 3 35 64 90 1 32 1 1 32 1 7 13 32 188 3 76 1 1617 32 420 2451 64 630 18 33 64 470 3 423 64 110 7 953 64 249 6 3 76 1 157 8 403 3 3 15 16 100 315 16 100 2 1 64 51 5 ...

Page 9: ... Release the wire holder at 2 location and peel off the tape 8 Detach the connector from each PWB VOL CH MENU TV VIDE O MAIN POWER Cabinet A Cabinet B Stand Terminal Cover S Terminal Cover L 1 4 2 3 5 5 4 2 4 Tuner PWB Inverter A PWB Inverter B PWB Main PWB R C LED PWB Operation PWB 6 Reinforcement Angle 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 Tape 7 Wire holder 7 P4004 P3601 P3602 P3302 P8401 P...

Page 10: ...ng 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 12 9 10 Inverter A PWB Main PWB Chassis Frame Chassis Frame Cover Tuner PWB Inverter B PWB Operation PWB LCD panel unit 14 13 R C LED PWB 11 12 12 ...

Page 11: ... B KLMP 0125CEZZ Lamp Unit A KLMP 0124CEZZ 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 Remove the LCD panel unit fixing screws 4 pcs 16 Remove the ITO earth spring fixing screw 1 pc 17 Remove the reflection defle...

Page 12: ...ner 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 3 Remove the FFC for connection between Main unit SC1203 and LCD panel unit and connect the extended cable QCNW A556WJZZ for service 4 Remove the FFC for connection between Main unit SC1202 and...

Page 13: ...ort circuit TP2001 to GND and turn on the power Or short circuit TP2002 to GND and turn on the power Or holding down the TV VIDEO key and MENU key turn on the main power and simultaneously press the inspection process CH Ù key and VOL key to change the mode to the adjustment mode Description The manual adjustment or adjustment through communication with the automatic machine is performed 3 Shippin...

Page 14: ...s mode so that the Y reading on the same page should be 187 202 3 Make the same setting for the PAL M TAMP and PAL N TAMP data 1 Adjust the B Adj value to 5 0 0 02V with R3714 Make exact adjustment of the 5 00V level be cause 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...

Page 15: ...ESS DVD PAL CONTRAST N358 BRIGHTNESS N358 AV CTI7D PAL M BRIGHTNESS PAL N BRIGHTNESS PAL BRIGHTNESS SECAM BRIGHTNESS PAL60 BRIGHTNESS N443 BRIGHTNESS D2 BRIGHTNESS HPRESC FIL42 D2 RGB CON OSD setting 40 35 40 35 5 1 60 68 30 28 40 35 40 35 7 1 60 68 30 28 0 2 153 57 0 2 0 2 0 2 0 2 0 2 0 2 5 11 0 48 29 33 3 RCUTOFF 0 GCUTOFF 0 BCUTOFF 0 R GAIN 0 G GAIN 0 B GAIN 0 D2 RCUTOFF 0 D2 GCUTOFF 0 D2 BCUTO...

Page 16: ...NE ALL GUIDELINE RATING NONE ALL GUIDELINE CONTENTS ALL UNBLOCK BLANK CDN ENGLISH RATING NONE ALL CDN FRENCH RATING NONE ALL V CHIP STATUS OFF SET UP BLUE SCREEN OFF CLOCK CLOCK AUTO CLOCK EDS CH SET AUTO EDS CH AUTO NOT DETERMINED EDS CH MANUAL 2 TIME 12 00AM DST OFF 7 E2 PROM data write 1 Call up the adjustment process menu and get Page 6 displayed on screen 2 Enter A40000002681 for the I2 C DAT...

Page 17: ...attern is displayed 2 IC1201 LCD controller test pattern 2 1 Getting the test pattern 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 DPS 1 turn on the setting and the following test pattern shows up 2 2 Test pattern The following test pattern appears Note When the IC801 and IC1201 test pattern display...

Page 18: ...lection input 28 P72 SCL2 CLK2 I O Hi Z SCL2 I2 C bus serial clock line 2 EEPROM 29 P71 SCL1 RXD2 I O Hi Z SCL1 I2 C bus serial clock line 1 UVTUNER VPC MSP 3DYC DPS 30 P70 SDA1 TXD2 I O Hi Z SDA1 I2 C bus serial data line 1 31 P67 SDA2 I O Hi Z SDA2 I2 C bus serial data line 2 32 R DIGR1 O L OSD_R R signal output of OSD 33 G DIGG1 O L OSD_G G signal output of OSD 34 B DIGB1 O L OSD_B B signal out...

Page 19: ...3 P17 D15 I Hi Z ADPPOW Adaptor ON OFF input 74 P01 D1 O L DACOUTCON Gray scale control IC for output control Output at H 75 P15 D13 O L N C 76 P14 D12 O L N C 77 P13 D11 O L N C 78 P12 D10 O L MP_DA Gray scale control IC for data output 79 P11 D9 O L MP_CLK Gray scale control IC for clock output 80 P10 D8 O L DDC_RESET L output at VPC G A 3DY C DPS reset 81 P07 D7 I Hi Z KEY4 Key input 4 82 P06 D...

Page 20: ...tion of model name For prevention of malfunction it is impossible to change it Selection of screen size inch Lamp error count and reset Hotel mode setting VCHIP line MUTE setting Setting for responding to CANADIAN VCHIP Bus UART opening ON OFF OSD display is not changed Adjustment or no adjustment of SHARPNESS by VPC No effect by D2 EDS data captured is displayed at the top ROM and GAIBU version N...

Page 21: ...AV CONTRAST 48 0 63 Decimal N358 TV COLOR 2070 0 4094 Decimal N358 AV COLOR 2070 0 4094 Decimal N358 TV TINT 10 512 512 decimal N358 AV TINT 10 512 512 decimal N358 BRIGHTNESS 16 128 127 decimal Equalizer setting 1 External input Equalizer setting 2 External input Equalizer setting 3 External input Equalizer setting 4 External input Equalizer setting 5 External input Equalizer setting 1 TV Equaliz...

Page 22: ...0 7 1 decimal PAL M TV LDLY 0 7 1 decimal PAL M PEAKING FILTER 0 0 2 Decimal PAL M TV H PEAKING 2 0 7 Decimal PAL M AV H PEAKING 2 0 7 Decimal PAL M TV CORIMGf 1 0 1 Decimal PAL M AV CORING 1 0 1 Decimal Horizontal position setting Horizontal position setting Circularity setting Y C phase setting composite S image Y C phase setting TV Peaking filter setting TV composite S image Image sharpness set...

Page 23: ...Decimal PAL60 SCINC1 1635 1024 4095 Decimal PAL60 AV LDLY 0 7 1 decimal PAL60 PEAKING FILTER 0 0 2 Decimal PAL60 AV H PEAKING 2 0 7 Decimal PAL60 AV CORING 1 0 1 Decimal Horizontal position setting Horizontal position setting Circularity setting Y C phase setting composite S image Peaking filter setting TV composite S image Image sharpness setting composite S image Image sharpness setting 2 compos...

Page 24: ...cimal 3 DPS7 PAL M TV PKLEVEL 7 0 15 Decimal PAL M AV PKLEVEL 7 0 15 Decimal PAL M TV PKCORRED7A 191 0 255 Decimal PAL M AV PKCORRED7A 191 0 255 Decimal PAL M TV PKCFSOFT7C 4 0 7 Decimal PAL M AV PKCFSOFT7C 4 0 7 Decimal PAL M VSTART1 35 0 1023 Decimal PAL M VSTOP1 36 0 1023 Decimal PAL M HSDEL 0 0 511 Decimal 3 DPS2 N358 TV PKLEVEL 7 0 15 Decimal N358 AV PKLEVEL 7 0 15 Decimal N358 TV PKCORRED7A ...

Page 25: ...LTI 143 0 255 Decimal PAL N AV LTI 143 0 255 Decimal PAL N TV LMODE79 67 0 255 Decimal PAL N AV LMODE79 67 0 255 Decimal PAL N TV LMIX78 79 0 127 Decimal PAL N AV LMIX78 79 0 127 Decimal PAL N TV CTI7D 153 0 255 Decimal PAL N AV CTI7D 153 0 255 Decimal PAL N TV CTIBWLP7C 0 0 3 Decimal PAL N AV CTIBWLP7C 0 0 3 Decimal 3 DPS8 PAL M TV LTI 143 0 255 Decimal PAL M AV LTI 143 0 255 Decimal PAL M TV LMO...

Page 26: ...5 Decimal PAL VOFPOSC 0 0 255 Decimal PAL VPOSC UPSF60 0 0 3 Decimal PAL PPLOP 975 0 4095 Decimal PAL PPLOP REF Display only 3 DPS21 SECAM AV COLOR 40 0 63 Decimal SECAM AV TINT 0 32 31 decimal SECAM BRIGHTNESS 0 256 255 decimal SECAM AV CONTRAST 50 0 63 Decimal 3 DPS14 PAL N TV BLEMODE 3 0 3 Decimal PAL N AV BLEMODE 3 0 3 Decimal PAL N TV BGAINREF71 199 0 255 Decimal PAL N AV BGAINREF71 199 0 255...

Page 27: ...99 0 255 Decimal PAL60 AV POINT72 21 0 127 Decimal PAL60 AV MINFIL73 71 0 127 Decimal PAL60 AV CROP 7 0 15 Decimal 3 DPS30 PAL60 HPRESC FIL42 0 0 63 Decimal PAL60 HSCPRESC 0 0 4095 Decimal PAL60 HPOSC UPSF60 0 0 3 Decimal PAL60 HSCPOSC 4047 0 4095 Decimal PAL60 VSCPOSC 4E 61 0 255 Decimal PAL60 VSCPOSC 4F 9 0 255 Decimal PAL60 VSCPOSC 50 0 0 255 Decimal PAL60 VOFPOSC 0 0 255 Decimal PAL60 VPOSC UP...

Page 28: ... 32 31 decimal D2 BRIGHTNESS 5 256 255 decimal D2 AV CONTRAST 55 0 63 Decimal 3 DPS37 D2 AV PKLEVEL 7 0 15 Decimal D2 AV PKCORRED7A 159 0 255 Decimal D2 AV PKCFSOFT7C 4 0 7 Decimal D2 VSTART1 26 0 1023 Decimal D2 VSTOP1 27 0 1023 Decimal D2 HSDEL 0 0 511 Decimal 3 DPS38 D2 AV LTI 135 0 255 Decimal D2 AV LMODE79 191 0 255 Decimal D2 AV LMIX78 79 0 127 Decimal D2 AV CTI7D 0 0 255 Decimal D2 AV CTIBW...

Page 29: ...0 255 Decimal NTSC VSLPF 0 0 127 Decimal 3 DPS43 PAL NAPPL 66 0 511 Decimal PAL NALPF 8 0 255 Decimal PAL NALPFOP 33 0 4095 Decimal PAL ALPFOP 488 0 4095 Decimal PAL OSD VB 41 0 1023 Decimal PAL OSD VE 42 0 1023 Decimal PAL APPL 324 0 1023 Decimal PAL NAPPH 0 0 3 Decimal PAL HSPPL 51 0 255 Decimal PAL VSLPF 0 0 127 Decimal 1000 order 100 and 10 orders Item Initial Values Min Value Max Value Displa...

Page 30: ...55 Decimal V21 L 67 0 255 Decimal V64 H 181 0 255 Decimal V64 L 82 0 255 Decimal 4 DAC2 V112 H 159 0 255 Decimal V112 L 100 0 255 Decimal V176 H 124 0 255 Decimal V176 L 133 0 255 Decimal V235 H 20 0 255 Decimal V235 L 235 0 255 Decimal V255 H 0 0 255 Decimal V255 L 255 0 255 Decimal 4 DAC3 COM H 182 0 255 Decimal COM L 0 0 255 Decimal VGL COM H 215 0 255 Decimal VGL COM L 0 0 255 Decimal VGL ADJ ...

Page 31: ...IN 10 0 15 Decimal DCCOR 8 0 15 Decimal DCGAIN 5 0 15 Decimal 08h 90 0 255 Decimal YHCOR 0 0 3 Decimal Every 1S Time taken until error port checking is started Every 1s H time Auto gain setting for TV Display position for other than card DPS PWMDIV F5 7 0 F6 3 0 DPS PWM1VAL F7 7 0 DPS PWMDIV F5 7 0 F6 3 0 DPS PWM1VAL F7 7 0 CLOSED CAPTION THRESH LEVEL CLOSED CAPTION phase setting Display or no dis...

Page 32: ...rohibit the input by other keys than these Change to by the numeric keys of the input position and move the input position to the next at the right When input of the three digits is over judge the password 3 Confirm the password by inputting three digits When the password is 0 2 7 setting of the adjusting process makes the hotel mode setting screen appear Setting of the adjusting process is not re...

Page 33: ...The cursor can be moved up and down by Cursor UP DOWN Remote control and CH ù Ù Remote control and Unit Setting can be changed by Cursor RIGHT LEFT Remote control and VOL Remote control and Set When the cursor is at ENTER setting can be entered by Cursor RIGHT LEFT Remote control and VOL Remote control and Set 4 Public Mode Setting Values Public mode setting values are initialized after setting at...

Page 34: ... value Sound volume fixed takes priority to maximum sound level Option Default Function Exception Remarks Selection between RESPOND LIMITED and NO RESPOND Looped RESPOND Remote control key operation is set 1 When NO RESPOND is set remote control key function in normal operation becomes invalid 2 When LIMITED is set remote control keys other than POWER Ch up down VOL and BRIGHT be come invalid Adju...

Page 35: ...and channel setting operation are prohibited When NORMAL is set START MODE FIXED is set to VARIABLE and selection is prohibited Note It is impossible to select Video 2 AV2 When channel setting is AIR it is impossible to select CH1 and CH70 to CH125 7 INPUT MODE FIXED Option Default Function Keys which become invalid in other settings than default Remarks Selection between VARIABLE and FIXED Looped...

Page 36: ...GHTNESS OFF TURNS OFF IN 5 SECS BRIGHTNESS OFF PRESS BRIGHT TO CANCEL Refer to the Table of Key Allocation in Sound Only Mode and Table of Key Operations in Sound Only Mode 4 Display of cautions in backlight OFF Display of Remaining Time in OFF timer are recovered temporarily cautions are displayed and when the display ends or 3 seconds elapse operation changes again to sound only mode entry proce...

Page 37: ...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 Invalid Temporary recovery Reset Reset Reset Special recovery Special recovery Temporary recovery Temporary recovery Temporary recovery Temporary recovery Temporary recovery Temporary rec...

Page 38: ...ight lamp 2 Inverter circuit Inverter PWB and Main PWB Tuner PWB F6700 F6701 F6702 F6703 F6704 D6700 D6701 Q6700 Q6701 Q6702 Q6703 Q6704 Q6705 Q6706 Q6707 Q6708 Q6709 Q6710 Q6711 Q6712 Q6713 Q6714 and their peripheral parts as well as pin 34 of IC1201 Q3601 3 Lamp error detection circuit Tuner PWB and Main PWB D3601 D3602 D3603 D3604 D3605 D3606 D3607 D3608 D3609 Q3602 Q3603 Q3604 Q3605 Q3606 and ...

Page 39: ...arts No COMPONENT output No Is input at Pins 1 2 3 and 75 of IC806 as specified Check J3404 DVD Y line PB line PR line and peripheral parts No TV output Yes No Are voltages at Pins 6 7 and 9 of tuner as specified Check the power line Yes No Is output at Pin 19 of tuner as specified Check the tuner and its peripheral No Is input at Pin 16 of IC3401 as specified Check the line in question Yes Check ...

Page 40: ...120 of IC1201 at H Yes No Are the oscillation waveforms at the primary side of T6700 T6702 T6704 T6706 and T6708 as specified Yes Replace F6700 F6701 F6702 F6703 and F6704 No No Is input at Pin 72 of IC806 as specified Check SC3405 SC line and peripheral parts Is input at Pin 71 of IC806 as specified Check SC OUT1LINE and IC8201 Q8206 FL8206 IC8203 Q8202 Yes Check the line IC1201 and its periphera...

Page 41: ...pecified Check IC3304 and its peripheral parts Check the line in question IC3301 and its peripheral parts Yes Check the speakers and their peripheral parts No sound from headphone Check J3303 harness and their peripheral parts No sound from output line Yes No Is pin 58 of IC2001 at L No Are outputs at pins 14 and 15 of IC3501 as specified Yes Check the line in question Check the LMUTE line Check I...

Page 42: ...42 8 7 10 9 6 5 4 3 2 1 A B C D E F G H LC 20B4U S LC 20B4U B CHASSIS LAYOUT MAIN Unit TUNER Unit R C LED Unit OPERATION Unit ...

Page 43: ...43 17 16 19 18 15 14 13 12 11 10 LC 20B4U S LC 20B4U B INVERTER A Unit INVERTER B Unit ...

Page 44: ...UT V_IN VIDEO SWITCH IC3401 IC3502 AMP F FI F FI SIF AMP Q3201 Q3202 SC SC3403 VPC_Y VPC_PB VPC_PR OFL1 P840 1 P1 17V P7 P37 01 P350 2 JACK J3303 HEADPHONE P3302 P3301 REMOTE CONTROL RECEIVER 23V 32V 9V 8V 5V 11V 4LAMPS DOWN INVERTER B UNIT Q6709 Q6710 IC3702 P3604 L_ERR LAMP CHECK DC IN PA VCC RXD TXD SIG VCC PWM IC3701 INV VCC P3603 P3602 P3601 6LAMPS UP T6702 T6703 Q6706 Q6707 T6704 T6705 INVER...

Page 45: ... GSP2 IC807 E2 PROM IC2010 RESET HDP C C IC2006 SSTBY YP CPB CPR HDP VDP 3 3V REG 3 3V IC704 L1 0 1 P1201 YP CPB CPR HDP VDP YP VDP HDP 3 3V REG 3 3V 3 3V IC705 I2C 5V REG 5V 9V IC2004 COMPONENT DISTINGUISHER IC1203 480I P 576I P701 7 01 P2001 P350 2 KEY1 KEY2 POW1 POW2 Q2002 REMOTE CONTROL RECEIVER SW UNIT VIDEO DECODER VPC IC806 MICON IC2001 LCD CONTROLLER IC1201 DPS REV GRADATION POWER IC1101 9...

Page 46: ...46 8 7 10 9 6 5 4 3 2 1 A B C D E F G H LC 20B4U S LC 20B4U B OVERALL WIRING DIAGRAM ...

Page 47: ...47 17 16 19 18 15 14 13 12 11 10 LC 20B4U S LC 20B4U B ...

Page 48: ...ing CAPACITOR 1 All capacitors are µF unless otherwise noted P pF µµF 2 All capacitors are 50V unless otherwise noted 3 All capacitors are Ceramic type unless otherwise noted ML Mylar TA Tantalum PF Polypro Film ST Styrol CAUTION This circuit diagram is original one therefore there may be a slight difference from yours IMPORTANT SAFETY NOTICE PARTS MARKED WITH å ARE IMPORTANT FOR MAINTAINING THE S...

Page 49: ...49 6 5 4 3 2 1 A B C D E F G H LC 20B4U S LC 20B4U B SCHEMATIC DIAGRAM Ë R C LED and OPERATION Unit ...

Page 50: ...50 8 7 10 9 6 5 4 3 2 1 A B C D E F G H LC 20B4U S LC 20B4U B Ë MAIN Unit 1 6 ...

Page 51: ...51 17 16 19 18 15 14 13 12 11 10 LC 20B4U S LC 20B4U B ...

Page 52: ...52 8 7 10 9 6 5 4 3 2 1 A B C D E F G H LC 20B4U S LC 20B4U B Ë MAIN Unit 2 6 ...

Page 53: ...53 17 16 19 18 15 14 13 12 11 10 LC 20B4U S LC 20B4U B ...

Page 54: ...54 8 7 10 9 6 5 4 3 2 1 A B C D E F G H LC 20B4U S LC 20B4U B Ë MAIN Unit 3 6 ...

Page 55: ...55 17 16 19 18 15 14 13 12 11 10 LC 20B4U S LC 20B4U B ...

Page 56: ...56 8 7 10 9 6 5 4 3 2 1 A B C D E F G H LC 20B4U S LC 20B4U B Ë MAIN Unit 4 6 ...

Page 57: ...57 17 16 19 18 15 14 13 12 11 10 LC 20B4U S LC 20B4U B ...

Page 58: ...58 8 7 10 9 6 5 4 3 2 1 A B C D E F G H LC 20B4U S LC 20B4U B Ë MAIN Unit 5 6 ...

Page 59: ...59 17 16 19 18 15 14 13 12 11 10 LC 20B4U S LC 20B4U B ...

Page 60: ...60 8 7 10 9 6 5 4 3 2 1 A B C D E F G H LC 20B4U S LC 20B4U B Ë MAIN Unit 6 6 ...

Page 61: ...61 17 16 19 18 15 14 13 12 11 10 LC 20B4U S LC 20B4U B ...

Page 62: ...62 8 7 10 9 6 5 4 3 2 1 A B C D E F G H LC 20B4U S LC 20B4U B Ë TUNER Unit 1 5 ...

Page 63: ...63 17 16 19 18 15 14 13 12 11 10 LC 20B4U S LC 20B4U B ...

Page 64: ...64 8 7 10 9 6 5 4 3 2 1 A B C D E F G H LC 20B4U S LC 20B4U B Ë TUNER Unit 2 5 ...

Page 65: ...65 17 16 19 18 15 14 13 12 11 10 LC 20B4U S LC 20B4U B ...

Page 66: ...66 8 7 10 9 6 5 4 3 2 1 A B C D E F G H LC 20B4U S LC 20B4U B Ë TUNER Unit 3 5 ...

Page 67: ...67 17 16 19 18 15 14 13 12 11 10 LC 20B4U S LC 20B4U B ...

Page 68: ...68 8 7 10 9 6 5 4 3 2 1 A B C D E F G H LC 20B4U S LC 20B4U B Ë TUNER Unit 4 5 ...

Page 69: ...69 17 16 19 18 15 14 13 12 11 10 LC 20B4U S LC 20B4U B ...

Page 70: ...70 8 7 10 9 6 5 4 3 2 1 A B C D E F G H LC 20B4U S LC 20B4U B Ë TUNER Unit 5 5 ...

Page 71: ...71 17 16 19 18 15 14 13 12 11 10 LC 20B4U S LC 20B4U B ...

Page 72: ...72 6 5 4 3 2 1 A B C D E F G H LC 20B4U S LC 20B4U B Ë INVERTER A Unit ...

Page 73: ...73 6 5 4 3 2 1 A B C D E F G H LC 20B4U S LC 20B4U B Ë INVERTER B Unit ...

Page 74: ...74 6 5 4 3 2 1 A B C D E F G H LC 20B4U S LC 20B4U B MAIN Unit Side A PRINTED WIRING BOARD ASSEMBLIES ...

Page 75: ...040 C2029 R2009 IC2004 D2005 R2106 R2033 R2008 R2022 R2026 R2028 C2009 R2035 C2011 R2024 Q2001 R2030 R2027 R2013 R2010 R2025 R2023 C2002 R2020 R2019 R2016 C2005 R2092 R2017 R2089 R2098 R2097 R2091 R2101 D2002 D2003 C8204 R2102 R2103 SC2002 C2007 TP2002 C8239 FB8208 L8202 C8207 FB8209 C8250 C8206 C8262 R8239 C8243 C8249 R8242 R8243 C8254 IC8202 IC8204 FB8206 R8241 FDC001 C8263 C8240 R8240 C8242 C82...

Page 76: ...76 6 5 4 3 2 1 A B C D E F G H LC 20B4U S LC 20B4U B MAIN Unit Side B ...

Page 77: ...1208 TL1289 TL1207 C1248 TL1290 R1258 TL1206 R1201 R1272 R1261 TL1283 TL1203 R1273 R829 C816 TL1204 R810 IC804 TL1291 C832 C834 R814 R819 Q807 C817 R825 C828 C827 R826 R806 R820 R808 R824 C823 C825 Q804 R817 R804 C821 C815 C814 R815 C810 C807 R830 TL1284 C806 TL1213 TL1214 R807 TL1227 IC802 R812 TL1229 TL1231 R818 R811 C808 R809 TL1216 TL1228 TL1230 TL1215 TL1222 TL1220 TL1224 TL1226 TL1218 TL1232...

Page 78: ...nit Side A OPERATION Unit Chip Parts Side A QPWBSB770WJN2 OPERATION Unit Side A QPWBSB770WJN2 P4004 D4015 D4012 D4022 R4021 C4018 SLD4001 RMC4002 R4029 R4024 D4014 Q4003 Q4007 R4023 R4001 D4011 Q4001 SW4008 SW4007 R4005 R4006 SW4002 SW4003 R4011 R4012 SW4004 SW4006 D4008 D4009 D4010 S4701 P4001 ...

Page 79: ...79 6 5 4 3 2 1 A B C D E F G H LC 20B4U S LC 20B4U B TUNER Unit Side A ...

Page 80: ...312 R3310 C3305 C3203 R3203 C3202 C3366 R3361 R3360 R3363 R3381 R3379 Q3205 R3216 Q3304 R3365 Q3305 R3366 R3517 R3315 R3390 C3308 C3371 C3360 C3361 C3364 R3364 C3365 C3370 C3362 IC3302 R3368 IC3305 R3322 C3377 C3309 R3319 C3206 R3378 C3313 R3321 C3311 R3329 C3368 R3302 R3317 R3314 R3318 C3209 C3367 C3347 R3326 R3377 C3376 C3315 C3334 C3205 C3310 R3320 C3312 R3324 R3328 R3757 C3369 R3333 IC3303 R33...

Page 81: ...32 R3742 D3706 R3723 R3738 R3740 FB3703 C3727 Q3705 L3702 Q3701 FB3702 D3701 R3728 R3741 R3743 R3739 C3702 C3712 R3701 R3735 C3736 R3703 FB3709 R3708 C3706 Q3704 Q3702 R3702 Q3703 R3713 C3716 D3702 C3721 C3703 R3705 C3710 R3718 R3717 R3712 C3708 R3711 T3701 FB3705 R3514 C3709 D3710 IC3701 D3703 R3765 R3761 C3738 D3704 R3762 R3760 R3709 FB3708 R3759 FB3707 C3715 C3705 C3704 R3706 C3701 R3758 R3729 ...

Page 82: ...82 6 5 4 3 2 1 A B C D E F G H LC 20B4U S LC 20B4U B INVERTER A Unit Side A ...

Page 83: ...11 C6713 R6709 R6710 FH6705 Q6707 R6727 C6727 D6700 L6704 R6705 R6726 R6725 P6705 Q6704 R6721 C6726 C6714 Q6705 Q6703 FH6702 R6707 C6708 R6706 C6707 R6704 C6709 L6702 FH6703 FH6701 FH6700 C6704 R6703 R6702 C6703 Q6702 T6700 FDC1 T6701 P6700 C6725 L6700 Q6700 R6720 R6700 C6702 Q6701 R6701 T6702 P6701 T6703 T6704 P6702 T6705 FDC4 ...

Page 84: ...84 6 5 4 3 2 1 A B C D E F G H LC 20B4U S LC 20B4U B INVERTER B Unit Side A ...

Page 85: ...Unit Chip Parts Side A C6741 Q6712 Q6713 C6722 R6716 R6717 R6719 R6718 C6723 Q6714 R6724 FH6708 C6740 C6724 Q6709 Q6710 FH6709 R6712 R6723 R6713 C6719 C6717 R6729 R6728 Q6711 D6701 L6706 R6715 C6718 P6706 R6714 FH6707 FH6706 T6706 T6707 P6703 L6708 T6708 T6709 P6704 ...

Page 86: ...lie veuillez fournir les renseignements suivants 1 NUMERO DU MODELE 2 NO DE REF 3 NO DE PIECE 4 DESCRIPTION in CANADA Contact SHARP Electronics of Canada Limited Phone 416 890 2100 MARQUE SECTION LIVRAISON DES PIECES DE RECHANGE DUNTKB767FE03 MAIN UNIT PRINTED WIRING BOARD ASSEMBLIES NOT REPLACEMENT ITEM DUNTKB767FE03 MAIN Unit DUNTKB768DE03 TUNER Unit DUNTKB769DE03 R C LED Unit DUNTKB770DE03 OPER...

Page 87: ...ng 10µH AB L8204 VP 1M100J1R6NY J Peaking 10µH AB CAPACITORS C701 VCKYCY1EF104ZY J 0 1 25V Ceramic AA C702 VCEASH1CN337MY J 330 16V Electrolytic AE C703 RC EZA123WJZZY J 100 6 3V Electrolytic AC C704 VCKYCY1AB105KY J 1 10V Ceramic AB C705 VCKYCY1AB105KY J 1 10V Ceramic AB C706 RC KZ0075TAZZY J 2 2 16V Ceramic AC C707 RC KZA041WJZZY J 10 10V Ceramic AC C708 RC EZA129WJZZY J 2 2 50V Electrolytic AB ...

Page 88: ...A143WJZZY J 100 6 3V Electrolytic AC C1271 VCKYCY1HB103KY J 0 01 50V Ceramic AA C1272 RC EZA128WJZZY J 1 50V Electrolytic AB C1273 VCKYCY1EF104ZY J 0 1 25V Ceramic AA C1274 VCEASH1CN337MY J 330 16V Electrolytic AE C1275 RC KZ0072TAZZY J 1 25V Ceramic AC C2002 VCKYTV1CF105ZY J 1 16V Ceramic AB C2003 RC KZA041WJZZY J 10 10V Ceramic AC C2004 VCKYCY1EF104ZY J 0 1 25V Ceramic AA C2005 VCKYCY1EF104ZY J ...

Page 89: ... AA R1111 VRS CY1JF103FY J 10k 1 16W Metal Oxide AA R1112 VRS CY1JF181JY J 180 1 16W Metal Oxide AA R1113 VRS CY1JF102JY J 1k 1 16W Metal Oxide AA R1114 VRS CY1JF181JY J 180 1 16W Metal Oxide AA R1115 VRS TX2HF100JY J 10 1 2W Metal Oxide AB R1117 VRS TX2HF5R6JY J 5 6 1 2W Metal Oxide AB R1118 VRS TX2HF5R6JY J 5 6 1 2W Metal Oxide AB R1119 VRS CY1JF473JY J 47k 1 16W Metal Oxide AA R1121 VRS CY1JF00...

Page 90: ... CY1JF223JY J 22k 1 16W Metal Oxide AA R2101 VRS CY1JF392FY J 3 9k 1 16W Metal Oxide AA R2102 VRS CY1JF223FY J 22k 1 16W Metal Oxide AA R2103 VRS CY1JF102FY J 1k 1 16W Metal Oxide AA R2104 VRS CY1JF103JY J 10k 1 16W Metal Oxide AA R2105 VRS CY1JF103JY J 10k 1 16W Metal Oxide AA R2107 VRS CY1JF101JY J 100 1 16W Metal Oxide AA R2108 VRS CY1JF512JY J 5 1k 1 16W Metal Oxide AA R2109 VRS CY1JF512JY J 5...

Page 91: ...J Diode AD D3707 VHDSFPB74 2EY J Diode AD D3709 VHDDAN222 1Y J Diode AA D3710 VHD1SS250 1EY J Diode AB D3711 VHDDAN222 1Y J Diode AA PACKAGED CIRCUIT X3301 RCRSB0307CEZZ J Crystal AG COILS L3201 VP 1M220J2R9NY J Peaking 22µH AB L3202 RCiLPA142WJZZ J Coil AD L3301 VP 1M101J7R7NY J Peaking 100µH AC L3302 VP 1M4R7J1R2NY J Peaking 4 7µH AB L3500 VP 1M101J7R7NY J Peaking 100µH AC L3701 RCiLPA026WJZZ J ...

Page 92: ...71JY J 470p 50V Ceramic AA C3711 VCKYCY1HB562KY J 5600p 50V Ceramic AA C3712 RC KZ1025CEZZY J 1 10V Ceramic AB C3713 VCAAPD1CJ396MY J 39 16V Electrolytic AF C3714 VCKYCY1HB562KY J 5600p 50V Ceramic AA C3715 VCCCCY1HH181JY J 180p 50V Ceramic AA C3716 VCEASH1HN476MY J 47 50V Electrolytic AD C3717 VCEASH1CN337MY J 330 16V Electrolytic AE C3718 VCKYTV1CF105ZY J 1 16V Ceramic AB C3719 VCEASH1CN337MY J ...

Page 93: ...W Metal Oxide AA R3530 VRS CY1JF104JY J 100k 1 16W Metal Oxide AA R3531 VRS TQ2BD680JY J 68 1 8W Metal Oxide AA R3532 VRS CY1JF000JY J 0 1 16W Metal Oxide AA R3533 VRS CY1JF680JY J 68 1 16W Metal Oxide AA R3534 VRS CY1JF101JY J 100 1 16W Metal Oxide AA R3535 VRS CY1JF223JY J 22k 1 16W Metal Oxide AA R3536 VRS CY1JF562JY J 5 6k 1 16W Metal Oxide AA R3537 VRS CY1JF272JY J 2 7k 1 16W Metal Oxide AA R...

Page 94: ...52JY J 1 5k 1 10W Metal Oxide AA MISCELLANEOUS PARTS å F3701 QFS D0008CEZZ J Fuse 2A 250V AE å F3702 QFS D0006CEZZ J Fuse 1 25A 250V AF FH3701 QFSHD1002CEZZ J Fuse Holder AA FH3702 QFSHD1002CEZZ J Fuse Holder AA FH3703 QFSHD1002CEZZ J Fuse Holder AA FH3704 QFSHD1002CEZZ J Fuse Holder AA FB3701 RBLN 0095CEZZY J Ferrite Bead AD FB3702 RBLN 0095CEZZY J Ferrite Bead AD FB3703 RBLN 0095CEZZY J Ferrite ...

Page 95: ...0006CEZZ J Fuse 1 25A 250V AF å F6701 QFS D0006CEZZ J Fuse 1 25A 250V AF å F6702 QFS D0006CEZZ J Fuse 1 25A 250V AF FH6700 QFSHD1002CEZZ J Fuse Holder AA FH6701 QFSHD1002CEZZ J Fuse Holder AA FH6702 QFSHD1002CEZZ J Fuse Holder AA FH6703 QFSHD1002CEZZ J Fuse Holder AA FH6704 QFSHD1002CEZZ J Fuse Holder AA FH6705 QFSHD1002CEZZ J Fuse Holder AA P6700 QPLGN0155FJZZY J Plug 3 pin HL3 AE P6701 QPLGN0155...

Page 96: ...lable Top Cover 4 2 JBTN A087WJKA J Operation Button AL 4 3 JBTN A088WJKA J Power Button AF 4 4 LHLDZA027WJKZ J Power Button Holder AE 4 5 MSPRCA014WJFW J Spring for Power Button AB 4 6 XEBSD30P08000 J Screw x2 AA CABINET AND MECHANICAL PARTS 5 Not Available 20 LCD Panel Unit Ass y 5 1 RLCDTA014WJN1 J 20 LCD Panel Unit DM 5 2 Not Available Back Shield Ass y 5 2 1 PSLDM4685CEFW J Back Shield AX 5 2...

Page 97: ... 11 24 20 26 15 16 26 26 18 17 21 19 15 26 INVERTER A PWB MAIN PWB 8 9 12 5 2 1 5 7 5 2 3 5 9 5 19 5 8 5 2 2 5 12 5 11 5 10 5 13 5 18 5 TUNER PWB 5 18 5 6 5 5 5 20 INVERTER B PWB 5 1 5 15 5 14 5 16 5 17 5 3 5 5 5 2 5 4 22 13 27 1 2 1 15 OPERATION PWB R C LED PWB D E 4 4 2 4 6 27 27 1 4 1 6 1 10 1 4 1 6 1 7 1 10 1 9 1 8 1 4 1 5 1 8 1 5 1 14 1 12 1 14 1 11 1 13 1 13 1 1 1 3 1 1 4 1 7 1 9 27 4 3 4 4 ...

Page 98: ...rd AE TiNS A691WJZZ J Operation Manual AS å UADP 0243CEPZ J AC Adapter BL SUPPLIED ACCESSORIES SERVICE JIGS USE FOR SERVICING QCNW A553WJZZ J Extension Cable 30 pin BA SC1204 LCD QCNW A555WJZZ J Extension Cable 20 pin AU SC1202 LCD QCNW A556WJZZ J Extension Cable 50 pin x2 AU SC2002 SC3403 SC1203 LCD SPAKCA663WJZZ Packing Case LC 20B4U S SPAKCA665WJZZ Packing Case LC 20B4U B SPAKFA258WJZZ Buffer M...

Page 99: ...nna Cable QCNWG0003CEPA Infrared R C Unit RRMCGA152WJSA LC 20B4U S RRMCGA152WJSB LC 20B4U B Packing Case SPAKCA663WJZZ LC 20B4U S SPAKCA665WJZZ LC 20B4U B Carton Label TLABK0001TAZZ Buffer Material SPAKXA220WJZZ Buffer Material Accessories SPAKFA258WJZZ Operation Manual TiNS A691WJZZ Cable Clamp 2 pcs LHLDWA002WJSA LC 20B4U S LHLDWA002WJSB LC 20B4U B Questionnaire Card TCADEA028WJZZ AAA size Batte...

Page 100: ...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 Quality Reliability Control Center Yaita Tochigi 329 2193 Japan TQ1552 S May 2003 Printed in Japan MI KG Design and Production Information Design Japan Production Japan ...

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