lcd-20xr1_sm5.28 MB
Contents
1. eo x SCHEMATIC DIAGRAM 6 POWER BOARD INFRARED BOARD t 1 l 8 l8 AOG2 VS 2 9 00 S jea fel E T05n4 8 Sfc ze Jes E E 8 II e T 2 i r s ao E Were E vost 20SN m J ovacle 2B nedo 9 c E Ak Pe idl Sr LENT m2 vo c Fz angg 0 S 4 o E080 mg TuS j z8 E052 1 Moosa B TSS a Ne u S5 5 z 5 eso visu 4 9 2 fT Sa 8 ES 8 Sisi gi RB d 2051 E E alle 58 5 zall AM a TOST dy dor 7 Sy05 1051d n 8163 zu c 8 Sum Sz o eee 1665 9 QB R RS e OvAS 2 ES m 1 SS I ee t 2 o P any 1 L g AZT S L 5 2063 H 55 osa T 58 uv02 71 i i np d 1182 PV le i O QN8 1 1 t och e o gs i BT Er Te N1Jedg T TOSL 23 pez ABT e c So fo XAPNHL roca 098650 i 1 1956 als rsd TS 20GA E 1508 N 9 5 8 e F ae n a t d d d an9 lt De 7 6 0 v J 7 J 2 n 3 2 Hom 5 es E 5 NSE ENI 4 NE DER C 100 4 H2 TE Eno 5 Gr ale pn Sec gato 2 UNS g 2 i x F 3 BS Bete 8 8 wo T DUT x gt ee 3 00 80 O iiooooooo2. EE z Eseu ABLSTAE E 23 SCHEMATIC DIAGRAM 4 FLASH NS2 WOH N30 WOH 81 0 HQQV 2 0 Viva a oleleo se o z SEE E E ERAS 5 ES EE EE d x ajas vL 5 EV HOOY m oF ann ev SV no e HO0v 87 St 8 HOOV e e x Ww av 7 1800Y 61 vi 8 H00V 2 CO CO CO CD CO CO ov LY p 02 ET E 14 H00V o 08 ew VIVO ve e i NV 51 uQOV viv Sv L0 00 ee 20 9iv WO dor Te 39 ov LE Z Ze Z7 vivd te 07 871 HOOV 07V VV ano ary 1 840 2 3o ey LEE Ua ams 8 ny velppy 201d OPOATEEXW EY Qj rmo viva aaa T Ge BY OOPN gy Ew m SUE i 5 H UV gg ay cy B Es ae S0ru 8 H Y ETY gy 4 Sow viv 18 9 47 uo v 50 ei GORE L 1 Wane gc 7v 3 am viva 8e G Da vr Hay pg G XT 18 ETY viva 62 4 Lv ee 39 8v c vu EL A xL 8 1 rInooogooro 0 90 07 1800Y E 6 HO0V ol ol col ro cols 30 nv Sjn u007 MN N 77 HOOV gers devo OV OA 162XN ay NS 5 5 5 glg es 01 Es Ss Aor 007 5 zm ABLSTAE E I 0072 2 2 2 2 UL d
3. Mutes 13 Switch see Mote A Mute Standby Sel see Note Bi 14 IC BLOCK DIAGRAM 5 Inner block diagram of FLI8125 digital video processing IC The descriptions of the pins of FLI81251C No Pin name Connections No Pin name Connections 2 KEYA Key A 43 SID S video terminal identification 3 KEYB Key B 47 PWM Pulse width adjustment 7 AFT AFT 51 AUD SEL 1 10 RESETn Reset 52 AUD SEL 2 15 XTAL Resonator 63 PBIAS Panel s oblique line control output 16 TCLK Basic clock 64 PPWR Backlight adjustment 24 SCL RS232 SCL RS232 90 DEN Display data 25 SDA RS232 SDA RS232 91 DVS Display V synchronization 26 SCL VGA SCL VGA 92 DHS Display H synchronization 27 SDA_VGA SDA_VGA 93 DCLK Display pixel clock 30 SCL SCL 148 STANDBY Standby 31 SDA SDA 149 MUTE Mute 38 IR_IN Infrared signal 161 SEL_1 PAL NTSC selection 1 input 24 bit Pattern Input Port Generator OSD Image Processing CVES VBI Slicer Inputs 8 A 5s 24 bit RGB S Video f Analog Front E 8 65 Output 18 bit RGB Inputs ra End 5j 2 i33 ou 16 bit YUV 5 ERED TTL Output YPrPb RGB 8 Te ayo DUAL LVDS Inputs FAROUDIA Le d Input Micro processor Interface Interface LR Low Intemal Micro Sam a E processor Bus Controller Inputs P Input IR Sensor External ROM e IOut Inp
4. eei T E 3 Exas pa 3S70 BFZIWI ge s r ge ES a T NEY 4 1012 nem c En 1 ANA vere B lk ny AOT 3079 OMET EAV SL 1 zorx Reve m ANG TOAGOS3 mam EOFN 50 a E n 21 SCHEMATIC DIAGRAM 2 TUNER amp AUDIO ASS mvaa aw C Ttav any lt I rww av anony C icvescanv be ugor S TI LL amat Dema POZON XPETM 19 00L 4368 CC inaw EZI c pa ABISTAE E oe W FLIBEFSSA Esa d soau FE Cw C1 22 SCHEMATIC DIAGRAM 3 SCALER FLI8125 105 27027815 TET veo mu woot TR ce pep wor Il Terea SVEI T tau fes 400 ae x SOOO TT cECSH Ol QVHo8 G3SVHHNIOL IVdA3 OL ABLS AE Et BAS YARN uo01 I ozo T ar Arte uis L ooosie 8n sI sin F Toss I oov ane
5. Et p enl som SEI S a WO dk u vica 7 up T0S 2 0c818 mw zu ri ig ereo T I ecd Reds 2 exe pocaEoeseoe MAJ 3 405 Pe MS RAE TE TOS ED TOUS e OOV 1 Ae i 10s 2i zogis ABLSTAE E 1061 ai Mr n T n ae 1 e wc us 1 Agis ne E4 T IW NEUE roe ee ey 3001 EX T SvE2 N 1v lt gt ver vas zz lt vais ee oreh vos CH C ws BEEE xls oor Eeu ard LES LUE 4 vi C s s a TUE x 7 9 Br a 1 umd CH PSE 9069 T s wee ff lee TU f NoSQne 0 1 A 4 eno Tires 8 LES an L gt 1 ats du EE CN y i TE E magos ABIS AE E EA E 00 1 _ gt ino av
6. radio station and cellular phone 2 TV set Symptoms Possible cause Unable to switch the power on Check to see if the power plug has been inserted properly into the socket No picture and sound Check to see if the power supply of liquid crystal TV has been switched on as can be indicated by the TROUBLE SHOOTING red LED at the front of the TV set See if it s receiving the signal that is transmitted from other source than the station Check if it s connected to the wrong terminal or if the input mode is correct Check if the signal cable connection between video source and the liquid crystal TV set is correct Deterioration of color phase or color tone Check if all the picture setups have been corrected Screen position or size is not proper Check is the screen position and size is correctly set up Picture is twisted and deformed Check to see if the picture frame ratio is properly set up Picture color changed or colorless Check the Component or RGB settings of the liquid crystal TV set and make proper adjustment according to the signal types Picture too bright and there is distortion in the brightest area Check if the contrast setting is too high Possibly the output quality of DVD broadcaster is set too high It maybe also due to improper terminal connection of the video signal in a certain position of the system Pic
7. 108 2102 818 gS hE E4 yor N3M WOH NSO WOH N30 WOH 81 0 HQQV 2 0 V1VG ABLS7AE E 24 SCHEMATIC DIAGRAM 5 OUTPUT amp POWER KEY BOARD C8GEN OIN 1H9I WOVE OL HOUMA Kd OF 804 Le AeL e ABE S ABONYIS ZOLA Luo vi D pres d u00 1 naa 8 UNS 84 indinp mp oe oe Tem orzo GXEE TOGIdY OLN 9 6 us 1068 Mer OOOO 2 5 x St HAS E0009 9 pa ABLS NE EF VAS e 5 x eo 6009 a a E ioSo 06 86858 91 9 rri Gc6H 5588 1 3 O OF WL mi vc6d ye m EZ6S reo ye 5588 41 3 MA m 1668 1288 B3MOd 340 aNd ol niy tT DS 25 26
8. 26y25 hex Properly set the path of RAMWrite C isp_fastflash lsp_parallel TEMP_OBJECT isptemp_ parallel hex and FastFlashWrite C isp_fastflash 20y25 hex save them and close 4 Set the LCD to off Connect the Y updating board and PC with parallel cable METHOD OF SOFTWARE UPGRADING 5 Connect the VGA MONITOR interface on the Y updating board with the VGA cable connect the other end to the VGA interface of the LCD 6 Turn on the LCD 7 Run Gprobe5 Connection Settings Set the Device to Parallel The click the item of Delays and Buffer Size Set Long to 50000 ms Click the item of Parallel Set Clock to 120000 Hz 8 Click Batch METHOD OF SOFTWARE UPGRADING Select the path of the File bat txt The Batch command will execute a batch script 0K batch script is a simple text file in which and each line is a separate GProbe comm ED Commands are executed sequentially On error es m n 3 Fila RS Beat D Note Use the OldBatch command from the Commands menu to execute GProbe 3 5 scripts File Select bat txt and click to open it Click OK to start the process of burning the program The following screen appears when the process if finished If you want to update the software next time you just need to click the pull down menu to select the desired Batch file and execute it in the following screen Note Do not cut off the power or turn off the unit during the burning process or th
9. SERVICE MANUAL LCDTV LCD 20XR1 AU SPECIFICATIONS Power supply AC 100 240V 50 60Hz Power Consumption 130 W Dimensions 568 W x 436 H x 172 D mm Weight 9 kg Screen 20 TV system amp channel coverage System VHF UHF CATV PAL B G 2 12 21 69 X Z42 951 941 TV system PAL BG NTSC AV Speaker 8W 80x2 SANYO FILE NO LCD 20XR1 AU PRODUCT CODE No 1 682 340 53 Australia REFERENCE No SM0915003 CONTENTS Safety INSUUCUON Sci TT 1 Alignment 3 Trouble Shooting TT TIC 5 Method ol software Co Exe DE DUE E bs RR eens 7 The unit working principle 10 Block e epp TT TP T 11 IC block GIA 12 Identification criteria for the bright spot and dark spot of the LCD screen 16 Wining OLEO SET c ocupado Sacra reduces tad E EE 2d RV uq 17 Troubleshooting CHAINS MP 18 21 Exploded er RPM 27 Parte a edo ace EE 28 SAFETY INSTRUCTIONS Attention This service manual is only for service personnel to take reference with Before servicing please read the following
10. Whether the voltage 8125is abnormal without of the panel is signal output or the output normal signal is abnormal Backlight boarddamage or protection Replace the backlight board Check power circuit or whether the 8125 PBIAS signal is normal TROUBLESHOOTING CHARTS 2 With picture and without sound when turning on Increase the volume Check if the no sound channel from the signal check whether every input to sound processing IC 1C15900 is normal channel has no sound Check whether the signal 15900 IC or peripheral circuit output by 15900 IC is does not work normally normal Sound amplifier or peripheral circuit does not work normally 3 When receiving TV signal there is no picture or dark snow Confirm the 5V 32V power supply of TUNER confirm 5V 9V power supply of IF amplifier is normal If they are normal check whether peripheral circuit of the TUNER or IF amplifier is normal If they are all no problem then 8125 or its input signal is abnormal 4 In TV channel the picture or sound is abnormal the frequency of the menu is different from the actual frequency Connect the signal cable manually adjust the frequency to conform to the actual frequency Enter into service menu check AFT value should be about 1 6V If the difference is serious the difference is larger than 0 4V open the cabinet and adjust the transformer until the value of AFT is 1 6V TROUBLESHOOTING CHARTS 5 Check flo
11. YPbPr signal to YPbPr YcbCr interface Separately input the several types of YPbPr format signals 480P 60Hz 480P 59Hz 720P 60Hz 720P 59Hz 1080i 60Hz 1080i 59Hz 1080p 60Hz 1080p 59Hz and check if the picture and sound is normal 5 Preset ex works In the status of TV enter the factory menu by pressing the factory key and then perform presetting 6 Ex works packing Check accessories and then pack them in box Trouble shooting Before servicing please check to find the possible causes of the troubles according to the table below 1 Antenna signal Picture is out of focus or jumping Bad status in signal receiving Poor signal Check if there are failures with the electrical connector or the antenna Check if the antenna is properly connected Fringe in picture Check if the antenna is correctly oriented Maybe there is electric wave reflected from hilltop or building Picture is interfered by stripe shaped bright spots Possibly due to interference from automobile train high voltage transmission line neon lamp etc Maybe there is interference between antenna and power supply line Please try to separate them in a longer distance Maybe the shielded layer of signal wire is not connected properly to the connector There appear streaks or light color on the screen Check if interfered by other equipment and if interfered possibly by the equipment like transmitting antenna non professional
12. able connection is loose When playing VHS picture search When being played or in pause VHS picture search tape there are lines at the top or tape sometimes can t provide stable picture which bottom of the picture may lead to incorrect display of the liquid crystal TV In this case please press auto key on the remote control so as to enable the liquid crystal TV set to recheck the signal and then to display correct picture signal Method of software upgrading The Y series models enable you to update software through the VGA interface Hardware requirements 1 One parallel cable with male end and female end 2 One standard VGA cable 3 The updating board especially for Y main board The steps for updating software 1 Install Gprobe 5 0 The first Double click the GProbe5 1 0 0 15 S0006 EXE 09A to install it According to the prompt of Windows and follow the steps one by one to finish the installation The second Double click the GPorbe5 1 0 0 15Update1 S0006 EXE 104A to install it BES SUodatel exe 2 Copy the full directory of Isp_fastflash to anywhere E g Take the root directory of C as an example for the following explaination Copy the updating file hex to the directory of C Isp_fastflash E g C lsp_fastflash 20Y25 hex 3 Open C Isp_fastflash lsp_parallel bat txt as follows lol x THE SEO RDO Bi ebugon SetBuffer 0x2000 0x800 FastFlashWrite C isp_fastflash
13. als d dn F Is not E TPA 00 3 z 8288 d0E 1 40 3 Z35388 Ps PRP bb p 25 ee ESEI rd Byres 3 35 r ud Baa r E E 7 Lh p ol zc 8 soeu y roe Ds m adi les Orde CDAT AE E i SONT AE E u00 SEED oz ccEH EE AT LNO ODAY xit She EE env Od recu 11 E Oe 178842 voor z od 39007 00 EEI IOVINE T uo EEEO og BIEL 3 ad IDA uto GEED BiEH trn og u00 VEE 02 iH eL EL Ra uo OED greu EA T m A L uoo Gt oz SeN 84 Sergi ecl E 08 8 fa TOEN eg E T 2no tow 90v vAE ju E 581 5 15 2 00 BEI E I el zz 78 owu sa uooi 269 Is le m fale ami mw 5 DE MM js GC cn uoor seea myey CUT nose ra T ZI 20d UNO VEL TU adr le mo 5 wor veed o tH ii gp Yu Lal c4 VAYA m Em D 269 TOEZ s we A al D E 5555489 N root SW BEC oo 82 oct yo ssssss ji 3E0a 5858888 a SA ES IJ d NI ONAA uro REEERE 20 4814 wu C3 5 C uico NI ONASH 1 01u00Y lt E gt z u5 11 0 800Y EEBBSSSEES e ERE ge Leey cu 300278 14 EE ons SSeS NOSONH OAT AE TEs zz SetH ie feiern are Es Be O am 2 zz vH i 0 Xi A M M E 1 1
14. e flash may be damaged Check the following if you fail to update 1 Check whether all cables are properly connected 2 Check the settings of Gprobe 3 It is wrong if the Gprobe shows as the following icon Ready WM 4 Now just click the icon of le to show ka icon THE UNIT WORKING PRINCIPLE ANALYSIS The unit working principle analysis For the PAL system when the RF signal is input to the tuner the turner generates IF signal Then the IF signal goes through the pre amplifying circuit and 38M SAW the VIF signal and 1ST_SIF signal will be generated When these signals are input into the M52760E IC the VIDEO OUT and SIF signal will be generated Then these two way signals are sent to HEF4052BT trapper and filter which selective output signal according to different sound systems PAL D K PAL B G PAL I The audio signal returns toM52760E IC via filter to be decoded and then is sent to R2S15900 while the video signal is transferred to multi system signal CVBS_TV via trapper and then is sent to FLI8125 directly For the NTSC system when the RF signal is input to the NTSC tuner the turner generates IF signal Then the IF signals goes through the pre amplifying circuit and 45 75M SAW the VIF signal and 1ST_SIF signal will be generated When these signals are input into the M52760E IC the VIDEO_OUT and SIF signal will be generated Then the SIF signal is sent to MTS decoder to perform BTSC stereo decoding at last the sig
15. eo smpooc 99A DNE x ani 4 5 5 ee a ml s 5 1060 1916 BS Es aim Fe ied 31 Sate G cH eny lt C olas lem RE E ASE 9 1n0 1 H3 eino eNI CA 3t nono ves addy 3 in 116031 Isa wi 3 8 2S a u HD j zuno WWI iF NI U HO E s 1n0 a ni 1 G X fo SR 760 EEGI est 659 mo VEOBZTNY ALY e AT 116 lt joj lt TT6H et 85 qe u00 AOF 1 69 dnce z169 8908EWEH TTEN CIC CIE EXPLODED VIEW 11 12 13 27 PARTS LIST REF No PARTS No DESCRIPTION Q TY REMARK 1 XIP21W01CO Front cabinet 1 2 X16152053900 Speaker assy 1 3 X16151053400 LCD panel frame 1 4 X170060215100 Light conducting column 1 5 XIYL20Y1521F RC Y21 0F Remote control 1 6 X18591140100 Shielding cover 1 1 7 XI667LPY1901 Main board assy 1 8 X18591139000 Shielding cover 1 1 9 XI667L20Y1920 Power board assy 1 10 X13352000J00 Panel 1 11 X13603004200 Power switch 1 12 X130208120 Switch bracket 1 13 XI6C9273C2 Key board baffle 1 14 X187030209120 Side AV bracket 1 15 XI667L20Y2105 Key board assy 1 16 XIP19WHH121 Back cabinet 1 17 X1102193C0 Decorative piece 1 18 X160922120B AV baffle right 1 19 X160924120 Back cabinet cover right 1 20 X160921 120 AV baffle left 1 21 X160923120 Back cabinet cover left 1 22 X110960120 Rotor cover 1 23 X16151058801 Holder assy 1 Only the
16. er testing X702 pin1 and pin5 power supply board voltage to be 12v and 5v 3 3 main board adjustment 3 3 1 IF amplifier adjustment a Turn off the J201 J202 J203 J204 1205 and J5 input 38MHz PAL SYSTEM and 45 75MHz N ALIGNMENT INSTRUCTION SYSTEM for X210 input 9v 0 05v and 5v 0 05v to J202 and J203 adjust L210 to let x205 voltage to be 1 65v 0 1v b Solder to J201 J202 J203 and J5 3 3 2 AGC adjustment Receiving 60dB signal of D 8 or A 7 N system adjust RP201 to let 3v 0 05v of X204 Input 100dB of antenna the picture should not no sync and distortion Input 35 40db low signals the picture should sync and the sound normal but the color should not disappear 3 3 3 white balance adjustment a Install the unit b Adjust to brightness for backlight c Access into the D SUB channel input 16 level gray scale 640 x 480 60Hz signal of VGA interface Press 2 5 8 and 0 buttons access factory menu perform reset ex factory set and auto color d Exit factory menu input gray H 8 signal adjust picture mode to nature e Enter factory menu fixed R OFFSET1 to 0 adjust G OFFSET1 and B OFFSET 1 to let second level to fit the table1 f Fixed R GAIN to 200 adjust G GAIN and B GAIN to let seventh level to fit table Table1 Color temperature 9300K X coordinate 0 285 0 008 Y coordinate 0 293 0 008 g Repeat e step to f step it must be measure a true value h The unit without VGA inter
17. face of 20 N system you should be rework c step enter VIDEO channel input Gray H 16 for NTSC system of VIDEO interface press 2 5 8 and 0 buttons to access factory menu perform reset ex factory set and auto color 4 Performance check a TV Interfaces Connect RF port to central signal source Enter station search menu to auto station search After system adjustment is correctly check if there is any station missing and the output of earphone or loudspeaker and the picture is normal b Interface of AV S Terminals input AV signal and switch to AV channel see to the picture is normal then input S terminal check if it can auto identify is normal Check if sound is normal c VGA Interface Input VGA signal K7253 signal generator Separately input the several types of VGA format signals as listed in Table 1 Then check if the picture and sound is normal If there has been interference to the picture then press the auto set key on the remote control once again and check if the display is normal Table 1 Display Format of PC Item Picture element clock H SYNC V SYNC Resolution Remark MHz KHz Hz 1 640 x 480 60 25 175 31 469 59 900 ALIGNMENT INSTRUCTION AND TROUBLE SHOOTING 2 800 x 600 60 40 000 37 879 60 317 3 1024 x 768 60 65 000 48 363 60 004 4 1024 x 768 70 75 56 48 70 07 5 1280 x 1024 60 109 47 63 72 60 e YPbPr Interface Input
18. nal is input to R2S15900SP The video signal is transferred to multi system signal CVBS TV via trapper and then is sent to FLI8125 directly The AV YPbPr YCbCr S VHS and VGA signals from the input terminals with the CVBS TV signal are sent to the main IC FLI8125 after decoding filtering De Interlace Adc and Scaler and according to different panel the main IC generates a 24 bit TTL signal or LVDS signal to send to the panel to recur the picture BLOCK DIAGRAM Pent oa ER WDA Tos ADONIS NI ONASA HIONASN OINM ZELUS re aoa YOA adda ae p TOEN EHT A AY TAY OQCCLN I AIOE NaCI UII a Wo ay ay 2h Nou XPELMLO9 OL YANAL LOZ 11 IC BLOCK DIAGRAM As follows we are going to introduce the inner IC block diagram and function 1 Inner block diagram of M52760 IF signal processing IC AFT QIF VIDEO OUT BLOCK DIAGRAM APC FILTER Vreg OUT VCO COIL OUT LIMITER IN EQ F B VIDEO OUT VCO COIL AFT SWINPSW RY RF AGC DELAY RF AGC OUT VIF IN QIF DET IN AFT OUT VIF IN GND IF AGC FILTER AUDIO OUT Descriptions of the pins Pin Description Pin Description 4 5 VIF input 13 QIF OUT 7 1ST_SIF input 14 VCC 10 AUDIO OUT 18 VIDEO OUT 2 R2S15900SP audio processor with surround stereo The audio signal from YPrPb YcrCb or VGA input inte
19. parts in above list are used for repairing Other parts except the above parts can t be supplied Jul 06 28 SANYO SANYO Electric Co Ltd Osaka Japan
20. points carefully Safety instructions 1 Instructions Be sure to switch off the power supply before replacing or welding any components or inserting plugging in connection wire Anti static measures to be taken throughout the entire production process a Do not touch here and there by hand at will b Be sure to use anti static electric iron C It s a must for the welder to wear anti static gloves Please refer to the detailed list before replacing components that have special safety requirements Do not change the specs and type at will 2 Points for attention in servicing of LCD 2 1 Screens are different from one model to another and therefore not interchangeable Be sure to use the screen of the original model for replacement 2 2 The operation voltage of LCD screen is 700 825V Be sure to take proper measures in protecting yourself and the machine when testing the system in the course of normal operation or right after the power is switched off Please do not touch the circuit or the metal part of the module that is in operation mode Relevant operation is possible only one minute after the power is switched off 2 3 Do not use any adapter that is not identical with the TV set Otherwise it will cause fire or damage to the set 2 4 Never operate the set or do any installation work in bad environment such as wet bathroom laundry kitchen or nearby fire source heating equipment and devices or exposure to sunlight etc Otherwi
21. ratch them Once they are damaged the screen SAFETY INSTRUCTIONS would be unable to work and no way to get it repaired 2 11 Special care must be taken in transporting or handling it Exquisite shock vibration may lead to breakage of screen glass or damage to driving circuit Therefore it must be packed in a strong case before the transportation or handling 2 12 For the storage make sure to put it in a place where the environment can be controlled so as to prevent the temperature and humidity from exceeding the limits as specified in the manual For prolonged storage it is necessary to house it in an anti moisture bag and put them altogether in one place The ambient conditions are tabulated as follows Temperature Scope for operation 0 50 C Scope for storage 20 60 C Humidity Scope for operation 20 85 Scope for storage 10 90 2 13 Display of a fixed picture for a long time may result in appearance of picture residue on the screen aS commonly called ghost shadow The extent of the residual picture varies with the maker of LCD screen This phenomenon doesn t represent failure This ghost shadow may remain in the picture for a period of time several minutes But when operating it please avoid displaying still picture in high brightness for a long time 3 Points for attention during installation 3 1 The front panel of LCD screen is of glass When installing it please make sure to pu
22. rface is selective sent to R2S15900SP through the multi channel selector HEF4052BT while the audio signal from the AV inputs is sent to R2S15900SP directly After the processing of bass treble balance and AVL by R2S159008 all these processed audio signals will be output to audio amplifier TPA1517 for 15 inch models or AN5277 for other models to amplify then the amplified signal will be sent to the speaker to output The Fig 1 3 is the block diagram of AN5277 IC BLOCK DIAGRAM SYSTEM CONFIGURATION VCC 9V REC L1 REC L2 IN L4 IN LS R28 15900SP Volume 1 Pseudo Stereo s control and Bass Treble Surround Volume R I2C BUS REC RI REC R2 IN R4 IN R5 Descriptions of the pins of R2S15900SP Pin Function Pin Function 2 7 Left right input for Channel 1 17 18 SDA SCL 3 26 Left right input for Channel 2 28 VCC 4 25 Left right input for Channel 3 11 19 LOUT ROUT 3 Inner block diagram of AN5277 audio amplifier with single end and double channels Prolection circuli Temperature Cher volage r1 ri m EN a E Feil m EM hod pus 1 B zs zs n Im PF ar BI ry LT Em E hod e 2 3B e e 5 ME E m o Z P a in H T x Fig 1 3 Cher current lur Load shert m IC BLOCK DIAGRAM 4 Inner block diagram of TPA1517 6W stereo audio amplifier Ret Mule standby
23. se bad effect will result 2 5 If any foreign substance such as water liquid metal slices or other matters happens to fall into the module be sure to cut the power off immediately and do not move anything on the module lest it should cause fire or electric shock due to contact with the high voltage or short circuit 2 6 Should there be smoke abnormal smell or sound from the module please shut the power off at once Likewise if the screen is not working after the power is on or in the course of operation the power must be cut off immediately and no more operation is allowed under the same condition 2 7 Do not pull out or plug in the connection wire when the module is in operation or just after the power is off because in this case relatively high voltage still remains in the capacitor of the driving circuit Please wait at least one minute before the pulling out or plugging in the connection wire 2 8 When operating or installing LCD please don t subject the LCD components to bending twisting or extrusion collision lest mishap should result 2 9 As most of the circuitry in LCD TV set is composed of CMOS integrated circuits it s necessary to pay attention to anti statics Before servicing LCD TV make sure to take anti static measure and ensure full grounding for all the parts that have to be grounded 2 10 There are lots of connection wires between parts behind the LCD screen When servicing or moving the set please take care not to touch or sc
24. t board AGONY LS L am 8 1noH 240077 RPE a gt e 3 5 ex TX xxx 8 pueoq Aey v pJeoq hey TANVd 17 TROUBLESHOOTING CHARTS This series models adopt built in power The power to the main board may be different when the unit adopts different panels or whether the audio amplifier is located on the main board or not The following is the detailed power in different cases Model Audio amplifier Power socket Definition of the pins as follows PBIAS refers to number on the backlight ENABLE PWM refers to backlight mainboard brightness control signal LC 20XR1 AN5277 locates on X702 1 2 12V 3 4 GND 5 3 4V power board Vcc 18V 8 pin 6 GND T PBIAS 8 PWM 1 No raster no picture and no sound When the main power is turned on the unit s indicator lights up in red red indicator is controlled by 3 3VSTANDBY use the remote control or the units STANDBY to lights up the blue indicator Whether the IR board s red indicator lights up Whether the blue indicator lights up when press the STANDBY button Whether the backlight lights up i Whether the backlight power or PBIAS pin is normal Power board s 3 3V is abnormal Confirm the IR Indicator damages or blue sensor and its power indicator 9V power is supply is normal abnormal check 9V circuit
25. t it in place 3 2 For service or installation it s necessary to use specified screw lest it should damage the screen 3 3 Be sure to take anti dust measures Any foreign substance that happens to fall down between the screen and the glass will affect the receiving and viewing effect 3 4 When dismantling or mounting the protective partition plate that is used for anti vibration and insulation please take care to keep it in intactness so as to avoid hidden trouble 3 5 Be sure to protect the cabinet from damage or scratch during service dismantling or mounting ALIGNMENT INSTRUCTION Alignment instruction 1 Alignment equipment PM5518 video signal generator K 7253 VGA signal generator CA210 white balancer IF signal generator Signal generator Oscillograph 2 Alignment flow chart The alignment flow chart is shown as Fig 1 Connect with central signal source then check each function of TV Station missing system identification analog control etc check the output of speaker Input AV S video signal and then check each function of AV S video Input YPrPb signal and see if the display is normal under PC status and check various functions analog control line field center etc Check the accessories and pack them in box Fig 1 adjustment flow chart 3 Unit adjustments 3 1 Flash writing programs Written memory N300 and N400 3 2 Check power supply board Turn off between power supply board and main board after plug in pow
26. ture is whitish or too bright in the darkest area of the picture Check if the setting for the brightness is too high Possibly the brightness grade of DVD player broadcaster is set too high No picture or signal produced from the displayer if XXX in search appears Check if the cable is disconnected Check if it s connected to the proper terminal or if the input mode is correct There appears an indication outside the receivable scope Check if the TV set can receive input signal The signal is not correctly identified and VGA format is beyond the specified scope Remote control cannot work properly Check if the batteries are installed in the reverse order Check if the battery is effective Check the distance or angle from the monitor Check if there is any obstruct between the remote control and the TV set Check if the remote control signal receiving window is exposed to strong fluorescence No picture and sound but only hash Check if the antenna cable is correctly connected or if it has received the video signal correctly Blur picture Check if the antenna cable is correctly connected Of if it has received the right video signal No sound Check if the mute audio frequency setting is selected TROUBLE SHOOTING AND METHOD OF SOFTWARE UPGRADING Check if the sound volume is set to minimum Make sure the earphone is not connected Check if the c
27. ut puts IDENTIFICATION CRITERIA FOR THE BRIGHT SPOT AND DARK SPOT OF THE LCD SCREEN Q ty allowed Distance between two spots Category criteria 15 20 22 30 40 15 20 22 30 40 Onesingie 22 5 2 3 spot Bright f 2 neighboring 215mm spot lt 2 lt 1 lt 2 lt 1 lt 1 spots Total No lt 5 lt 2 lt 5 lt 2 lt 3 O ingl 215mm Bees lt 6 lt 7 lt 5 lt 4 lt 10 spot Dark Two 210mm 25mm spots neighboring lt 2 lt 2 lt 2 lt 1 lt 5 spots Total No lt 6 lt 7 lt 5 lt 4 lt 10 Total defected point lt 8 lt 7 lt 5 lt 4 Notes 1 Definition of defected point bright spot dark spot It is identified as a defected point if its area exceeds 1 2 of a single picture element R G B 2 Definition of bright spot It is identified as a bright spot if it is bright in the state of dark field and its bright size remains unchanged 3 Definition of dark spot It is identified as a dark spot if it is dark in the state of white field and its dark size remains unchanged 4 Definition of two neighboring points Defects of a group of picture elements RB RG GB WIRING DIAGRAM pyeoq peJeJju Ast NE EH Wid SvI d Ae pJeoq uen Left speaker pJeoq Jewog ABONYIS zm Inoy 1n x oO ex x D aa x502 Back ligh
28. w of the power board 20 Power board damages Replace the fuse and check Y Replace N501 D501 whether N501 D501 or fuse blows breakdown Y Check whether C512 has 18V Replace D502 Check whether pin1 of N501has wave N Y Check whether N502 is damaged Replace N502 N Check whether N505 D507 is N a Check whether N505 is Y a Replace damaged damaged N505 Y Replace the damaged parts SCHEMATIC DIAGRAM 1 INTERFACE u 1n0 any OH 1nOAV c lt rino any eH C vorx G orany van 5 img 8 bs Oo O Tymon 4 X ceu T viu ale 9 gt Tamon E d OIGNV ANA upor i o ABE u00 PRESTITI nee ls 5112 T O gt u Ana anv 23 Li O 1 ji 107X I ast DO S i O i Ton TAG 1010 i C t gt uiwvcany P ane erin o vaas CH 1 yay I gt FAY av o t t m LO riw any van vas je e213 871777 rs eo 1 007x H 5 H 2 o ied I B 4 LO N A gt ars a L 0301 78 e we amp x o 9 o 500 Ta E F Sotx p Jere at
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