TDE-F6XPM SERVICE MANUAL.cdr
Contents
1. FOSO RVCC PS5V R2 R3 R4 0 0805 0 0805 0 0805 LDO RVCCIN 838 249 861 FOR 5V 5 R6 R7 MT1336E R46 R60 R63 3V 15 AXIAL TRCLOSE _ 10k 12 0 10 R12 100K R13 106 ma RVCCIN 5 amp mia 1 Very Important 25 3018 04 100 ed 25 3018 to reduce Noise 4 avcc 444 ut 1 55 SF HD6AV 0 5mm 24P TOP 38 SIDE CONTACTED c16 4 10 4212 57 AGNDX LD DVD 2 1 88 H 59 4 t 0 33 ee 8 HALLCOS DPFN 32 LD CD 2 REFCOS jal VR DVD jZ AGNDM 30 VR CD 14 HA2. R42 100k 74HC04 DACV33A RFRPC R44 R4 47 845 o 74HC04 71062 67 68 C69 70 71 72 73 1 4 R46 0 R47 100k R48 10NC 0 10 10 1 2 Foso 95 080 T cso 2 2 5 80 1 943 47 FMSO AV33 4 7uH NC 27 2 66 65 2 ces 10u RFON 2 RFON gt gt Dyas E prop pP T TE V2P8 c90 R49 47 2 vars gt gt 104 1 SCLK c77 2076 21 gt 104 2 R52 1K 890 ___ DMSO 5 2 21 2 a 21 550887 Coe 2 SDEN SDEN 10 10 2 REIN lol lt sl
3. CN101 ue 818 R12 VS 851 RS FLA FL HS If 1 Svideo_C Ei 4708 10uF 16v 470R 3 10uF 16v cit 05 02 CVBS 4 R27 100 R19 R13 5 ats 10K MUTE 24 MUTE 9014 a 9014C 10K YG 47 RS 5 5 470R 470R GND _ 5 Ja 510 10 214 5 ___ 11 7718 112 Ese 5081 _ _ 13 1 R14 ST 15 SACH C16 R20 ETAR 18 SUB1 Jle SUB eno 1 10 16 4708 FLT qe 470R MUTE 7119 10 16 0 c10 06 825 8 R28 100P R21 4708 10K 9014C 20 1 25 10 p MUTE 9 20 1 25 9014 4708 AUD Io OUT E 5 AUDIO 5 SUB PSCAN 75 bey R16 Pi 151 15 17 R22 If 0 715 CE1 x CE 470R V MR _ 1 ate 10uF 16v R2 0 4708 10uF 16v 04 8 ee 826 100P R29 c9 a7 10K MUTE c21 C22 C23 _ CON9 2 0 10K 100P R23 RA 90146 100P 100P 100P 20 X 9014C 470R 470R L1 AXIAL S VIDEO OUT 5V ENEN 1 R5 1K c2 at 2 0 1UF 0140 ue 4 R3 47uF 16v C4 set e 5 104 1 A HS 6 Ang Att AD di 447 VS SHORT 10008m 412 tt CONT ie Re FS 68
4. 5 3 2 1 159 106 18k MICR f 10 R105 10k 12 161 C162 R109 RMAIN ava 1 RIS 2 U12A short 0 1 10u R107 10k C163 3 3k al 1500p 4 R110 A MUTE 023 NC NC 12V 111 NC _ C165 R113 18k gt IN 10 R112 10k 12 4 A murep AMUTE C167 C168 R116 112241 AGND LMAIN 46 1 u12B 0 10 R114 10k R115 3 3k e NJM4580 A C169 550 R117 MUTE Q24 1500p NC NC 12 118 3 s7 4 R119 18k syy sc RIV 141 9 a ae 122 short 0 I ASR B U 10 R120 10k R121 3 3k 84 5 vec 1500 R124 MUTE 025 5 __ 4 NC Nc 1 1 234 YE _ NC R125 NC 8 lt 2 y a R126 18k 2 MICON gt MIGON _ 2 gt ASPOIE Hii 57 fl 178 R131 u U13B short 0 HC 2 A SL 20 1 25 10u R129 10k R130 3 3k Give NJM4580 1500 55 R132 A MUTE 026 NC 120 12V NC R133 P12V 121 0805 181 182 C183 C184 C185 7 0 10 100 0 10 0 10 R134 18k 121 P12V 12V C187 C188 R137 LFE JE U14A short 0 FB 0805 1 1 A LFE C189 191 192 C193 10 R135 10k
5. 1379_216 i 25 022 139 pas DE HIGHA4 Ha oo rics 132 pmr 28 pyss Dams 18 6 122 por 007 204 9024 134 7005 Ha noes po Ie ie pe 05 8027 191 199 v8 028 128 a 127 0030 aot Hao 24V VSDA1 ae 1 vepvec Rag Hii ag 2 o 3 H o 4 a9 10883 128 5 100 25 404 Raio e Him 7 47 10 6 nes m IR 48 016 mo 9 ea 6 pvas 10 PCON 010 0 7 Rad Mt as 1 mo Hos Ras 1 ag 252 12 1 19 RAG 13 53020 pvpp3 Hi 7 8 m A g E rE gt pmvss 850488 82195924 4 gt 2 gt gt 5 2420 2 55 2002552 225 lt amp 55555 45552 45555 116 9 dg 1
6. 1523 1302 100uF 25V 100uF p5V 0 6uH 4 Drain 8 RC C307 R302 R303 R304 D310 gt 0319 0320 6 8k 6 8k we Sues 100uF 25V 100uF 25V R305 2 enD 0 33 2W 2 L304 4 ae t 20301 9301 BZX79C10V 8050 R319 R307 R306 D312 68k 100 Swrrusyx 1305 330 1 4W 0304 1 5 2655 10 7 0323 de R309 D306 0313 4 7uF 100V gt _0325 C326 56 1 4W FR104 RU3YX 470uF 16V 70uF 16V 20305 BZX79C5 6V i R310 PAS R322 c309 220 A 220 L306 10uF 50V 1 pe 5 10 0302 Nw 4 4 323 6 8 lt lt R328 NU R324 C333 470uF 16V 2 7k 1 470uF 16V c3tt d 222 400Vac 70329 0303 10 16 AZ431LB R325 1 5k 1 H 4 CAUTION CON303 HEADER 12 2 5 TCL1379M6 11 1 NDEX 5 G E ORY amp POWER R ES ERVO MT1336E MT1379 SDRAM UDIO WM8746 VIDI FLASH EEPROM FILT ER UDIO FILTER OUT PUT NAME TYPE DEVICE NAME TYPE Digital 5V SUPPLY GND Digital Ground RVCC Servo 5V MT1336E SGND Servo Analog Ground AVCC 5V PICKUP HEADER AGND Audio Ground V33 D
7. 2 2K R7 R11 OPEN 220P oP 1K 91 OHM 620 _ VGA open SPDIF 19 1008 100P R 330 OHM A itle lt Title gt ize Document Number B lt Doc gt lt ReyC ate 000 000 15 2003 Bheet 1 of 1 1 de gt 4444 4 9 1 2 24 999999 aad PETTEE 095559550500 080680 Boa 34 seas 22 35 sEG7 36 02 0801 secerke HI 1 SEGSIKS 13 POWORF voo SEGA K4 29 18 16312 HZ 4 40 LEDs SEG2 K2 REM301 R308 2 LED2 SEG1 K1 7 Vooks gt J1 SHORT 51K LED 0301 0302 0303 5VP 44 4 77418 W 14148 1 4148 GND 2 A 8307 5 100 ohm C310 CON304 6 2 499 1 R304 305 R306 325 4 R312 K301 K302 K303 La 470 OPEN 17 1 R309 10K cs R301 100 ohm 4 10K CLK R302 100 ohm
8. 8009 _ _ 22 A9 Dag A9 Das 40 ppa 20 42 _ 80010 6 20 25 10 0910 43 80011 __19 19 0010 4 27 0011 80012 Baai 438 SDCLK Dae 80013 SDCLK Date RDOZT 0913 48 aa 0913 48 34 48 BOSH 00 0015 42 a pats 49 DCS 5033 005 _ 18 5033 oA 05 5_ BAS ve BAS voe pwer H cas vec pwe H cas vec 15 ie 15 WE ij WE 5033 WEF WE 5033 roars veca veca 22 no iL nc vssa vssQ vss vssa vss vssa vssa SDRAM 512 16 2 SDRAM 512Kx16x2 ESMT 121 16161 5 50 PIN TSOP 11 400mi1x825mil 0 8mm pin pitch 5033 9 120 121 122 24 125 126 10 10 10 10 10 10 10 10 0 10 10 10 0 10 4 4 4 4 ug us Fvce A16 AIS 15 ats 2 22 0 Vec 15 24 BYTE ANS 552 1 ADO Ma HA2 DISA tts 15 802 11 097 A4 0 01 8 0014 2 8 45 102 12 202 _ 006 ae 6 i i 0013 9 24 7 104 22 55 NC1 0
9. 2 ADIN ADIN 095 1000 28 5 QB gt 2 HEC 47 TEO ETTET E 21 y 12 cs 55 520259025200505245550222555522505538652028805829 47u 10 0805 80552 23513532425 55555065555 2 gt 595456 gt gt 0 gt 0699 gt 0 gt 92 eo 185 R54 8 2k 1 ESSE 8 558 R55 TA 2 1 PLivss Yuvorcin 282 2 X 3 LPIOP rey LPION vREF 180 ae 5 LPFON 189 LPFIP ASDATAS 158 2104 Ton EF R56 106 ASDATAS 18 15 A ASDATA2 158 C107 100p 57 750 101 1 peed isa Asono 11 Foso PLLVDD3 spor _ _____ nog 20 12 Foo 152 TROPEN 1 14 TRO acik 14 TROPENPWM ovons 80_ 2 18 Punoure Ae 25 17 16 DVDD2 H __ 7 DMSO gt 10 5001 Bpis 5 z R63 15k 19 pvss 8 SRO Re2 GND 1K ovss 018 Hon H Fa 143 8 HIGHAQ 42 HIGHA1 pE
10. 9012 9012 GND GND PrN VNFEC k FM 23 DMSO VOSL 1 24 VINSL 5 25 1 VINSL 3 R32 20K 2 vintk CF2 5 555 5 5Y 128 stay 1 150 57 7 BA5954 R34 R33 7 330K 835 750 GND 330K vipa ag R36 1 0805 R37 390 9014C SP TROPEN TRCLOSE 1 2 6 Na 6P 2 0 gt cso SDATA yy 80 REON ___ ron V2P8 gt gt vera SUK vipa vipa MSO __ RST S ust SDEN yy spew PWMOUT2 REL pari ADIN gt gt ADIN me Sime AERP TEO Sm R0 gt TROPEN STROPEN 0 5 1 Ryco 0 AVEC 1 aco 11 DV33 0 33 1 3 Ryco AVEC 111 GND lt GND 1345 SGND 1345 Vv 2 0 2 22UF 16 MOUT L MOUT R VA 10 OHM 5 JOQUF 25V C14 4 7UF 16V lt C9 22UF 16V 19 21 R13 R14 OPE 103 332 10K 10 02 4558 30 SHORT 1UF 211 9 10 LPF1 OUT LPF2 OUT 5 N OP1 OUT
11. 1 PRV EXT PAUSE DATA R303 100 ohm 4 R310 10K 4 304 305 306 2 OPEN CLOSE 100p STOP PLAY R311 1 24V 3 exo 5 K307 CON303 DATA DATA gt 7 cS 1 gt 10 n 900 12 MUTE _ pp CONT3 2 0 go M 00000000000 CIRCUIT DIAGRAM 0 0 TD F62 00 0000 40 0TDF62 FBD 0 0 000 0307 THE PARTS MARKED WITH ARE IMPORTANT PARTS ON THE SAFETY PLEASE USE THE PARTS HAVING THE DESIGNATED PARTS N UMBER WITHOUT FAIL PAS FR104 PAS PAS F301 T2A 250ac 5 0312 0303 R311 100 25 4007 1 1 4W CON301 INPUT PAS 1 8312 1K A C304 CON302 0 1uF 250Vac D304 C305 POWER SW N4007 7 400 D308 R313 104 22 1 120314 8314 710 50 51k 4 103 1kV 0309 8315 i PAS FR104 2 2 1 4W 1 0315
12. 2 6 Troubleshooting and service of KARAOKE part a Microphone with sound but no echo a Check whether the level ofthe 1st pin of U1 onthe KARAOKE board is 5V If not check whether 1 15 damaged b If the voltage is proper check whether there is anything wrong with the adjacent parts of U1 b No sound of microphone a Check whether the microphone indicator on VFD lights If the level of pole of Q16 islow the andE poles of Q16 are short b Check whether the power source of U2 on the KARAOKE boardis normal and with microphone signal output If not check whether the parts of input circuit for microphone jack are damaged and check whether the microphone jack is rusty or short The sound of microphone can not be turned off Check whether Q16 and Q17 areopen or not in good contact self excitation once KARAOKE is turned on Check whether the adjacent parts of U1 on the KARAOKE board are damaged 7 Full screen display or no display VFD a Full screen display on VFD is often caused by abnormal 24V bias voltage Check whether D5 C19 and R17 are disconnected b If there is display VFD firstly check whether the filament lights red If not and there is 3 3V voltage difference between AC1 and AC2 check whether D6 C9 and R21 are damaged If the filamentis not red while 3 3V voltage difference exists between AC1 and AC2 replace VFD If 24V and AC1 AC2 voltage are normal check whether t
13. 27MHz signal of the 29th pin are normal and whether C162 and R68 are normal If not replace U10 Cy g When U5 works normally check the connection between U8 U9 and U3 If abnormal replace U8 or 09 h Replace the main chip U3 after making sure no damage to the adjacent parts and no short circuit or false welding for the circuit board 4 Troubleshooting and service of video part 1 Normal sound no video picture Check U10 that whether the data of pins from the 1st tothe 8th hsync and vsync signalof the 10th and 11th pins 27MHz signal of the 29th are normal and whether C162 and R68 are normal Ifnot replace 010 2 Abnormal color ofthe video picture a If there are horizontal orvertical streaks or improper color appears on the picture after reading adisc the U3 decoding servo chip on the decoder board or U6 EEPROM may be in problems b Check board whether the 3 3V and 2 5V power sources are normal whether the ripple factor is too high and whether the data wire of Y 0 7 between U3 and U10 is normal c Check whether the video filter network circuit on the decoder board works normally 5 Troubleshooting and service of audio part a Normal picture no sound a Firstly check whether the 8V and 8V power sources for the operational amplifier U12 U14 are normal b Check whether the poles of muting tube 014 015 022 023 021 and 020 are atlow level constantly If so the above tubes are not i
14. R136 3 3k cm C194 NJM4580 1500 550 8 R138 A MUTE 027 1004 198 NC 12V NC R139 A A 1235 GND gt gt GN2 R140 18k R141 470 MICR MICL Ria 470 BiA C198 R146 R144 470 U14B short 0 i Mo 10u R142 10k R143 3 3k 51 6199 NJM4580 R149 1500p 55 R147 MUTE MICON Q29 NC c200 NC 9014 aav NC R148 NC A A Te lt R150 ONC AL RIL AQ 152 ONC MIC HL AR g ICD HR 3 4 ANV 5 6 6PIN 2 5 11235 pee 1 235 GND gt gt GNO__ 1 5 ivy PN _ anyan 5 12V pea 2 ACLK 2 2 ALRCK 2 2 2 ASDAT2 RN2 33 4 vec L12 0805 5VA 5VA 5VA 9 C133 C131 0 1 WM8746 5VA DVDD AVDD1 AVDD2 1L AGND1 AGND2 12 tatcites ra SCLK IWL GRO SDIN DMO GR1 GR2 A LMAIN 2 pie outon 22 _ Res ALRCK 80 a OPEN w LACLK2 OUTI 150 21 LREAR L R82 33 SDATI ASDATZ 23 RR
15. 05 105 0012 41 106 22 ABS WE Das AHAI 107 30 vec ea 11 18x 0011 ia 88 12 tog 18 NC4_ toto 0010 Seale A18 Daz 012 25 17 pas Hi 001 a 1014282 pas ADO 18 1015 A5 pao 29 oE 2a A4 RESET 2 26 28 A _ WE IX29F800T TSOP 48 2 0908 2 7 22 124 GND AT49F8192A SOP CSH Des RAS DRAS CASH DCAS WEF DWEF fo DCLK Res _ SDCLK R69 33 SDCKE DMAO MAT DMAt MA4 DMA4 DMAS DMAT MA9 DMA DOMO RDQMO DOMI RDOMT SCL 501 010 DOING RST_ NC L WP RST_ vss SDA EPROM 24 16 57 508 R72 0 R73 1K SCL R74 R75 1K SDA use 5V 120 bus pull high to 5v
16. 15 216 R66 1u 0805 AV33 lo 47 foo R67 47 a Samed cu lofts TERI S e 2R BBE 4 Aa po SS R78 85232 4 2 0 mim NC 24V 24V 1 F F 1 1 1 PS5V PS5V 1 vec 1 34 5 1 avec 1 AV33 1 V25 V25 1 DV33 13 GND lt OND 11345 SGND___ SOND 1345 MUTE yy 4 MICON yy MICON 5 RESET yy RESET 5 HSYN s HSYN 6 _ 5 VSYN 6 6 URST 1 Ying gt gt Y 1 6 141 5 ae ve ASPDIF ASPDIF 5 ACLK 4 ALRCK 4 4 ASDATO ASDATO 4 ASDATT 4 ASDATZ ASDAT2 4 018 3 00 7 3 PRD PRD 3 PWRE PWR 3 POEH 3 11 11 3 gt 0 1 3 gt 13 31 yy DOMIO lt 3 RAS RAS 3 amp case 3 lt 3 WEF 3 DCLK DCLK 3 DCKE 3 SCL SCL 34 SARS Soa 84
17. 6 RDQMO RDQM1 39 to 200 1 pat 2 2 Ba ee 003 RDO4 4 004 8 5 5 005 tae AG bes 7 007 RDQS 42 009 4 0910 ROOT 11 0911 47 BAQ A13 0912 48 12 0913 50 3180015 0015 ORE 3033 cS vec RAS vec vec We 5033 DOML DOMH veca NC NC vssa vssa vss vssa vss vssa vss SDRAM 1 16 4 EliteMT M12L64164A 5T 54 400031 x 875mil 8002 RDQS 8004 8005 006 RDQS 8007 508 RDQS 009 RDQS 0010 RDQ10 Dan 5012 5013 Dota 5015 0016 80011 12 80014 80015 RDQ16 0019 RDQTS 0027 RDQ20 7 mao 21 _ mao 21 22 RDGi 22 pai RDGZ DMAZ Pl bai 23 s 8092 _ 23 24 42 092 BDOS 24 2 poe amp __27 RDQS DMA4 8 Rpa Br 094 28 5 006 8006 BE 5 005 8 28 6 RDG 26 6 307 7 loas 007 88 bas 28 8 38 M g
18. EAR H BCK H LRK CENT om pin ourer 18 __ME _ cap 169 141 0 1 10u 5VA U13 WM8726 GND 25 A adi LMAIN FORMAT DEEMPH vouTR PMAN 10 C138 C137 2100 SLACK ro SBCEK GS 8 R154 07 1N4148 1K 1 b a R87 10k ce Q16 470U 9015 R89 10 017 9012 D9 1N4144 NC 1 gt 4 R91 10K NC A PMUTE PMUTE Q19 9015 012 1N4148 RESET gt RESET vcc J a 2 MUTE MUTE R93 R94 121 amp 4 7K 3 3K MUTE R95 10K 020 9015 GND AGND vec oR 1 A P12V 98 OR NC R99 100K GND VGND 015 1 4148 R101 10k 12V R102 100K 155 10uF 16V MUTE CIRCUIT 5VV 5VV C137 22 02 1 4148 1 cvBs 114 1 8uH 4 C138 C139 D3 220 100 1 4148 5 5VV C142 22p D4 1 4148 4 sy L15 Q14 1 8uH DIP 9012 C143 144 05 220p 1 4148 5 C145 22 06 1 4148 4 sc L16 1 8uH C147 C148 08 OOp NC ie 1 4148 5VV 5VV C149 22 010 1 4148 RV 117 1 8uH C150 C151 011 220p 100p NC 1N4148 NC 5
19. LLSIN TRLP 15 REFSIN TRLPA 28 16 0805 T 1 12 2786 SINPHI CRTPLP 77 Vee V20 500 25 025 ve 40uH DIP swe HRFRP 12 a 19 21 55 i ae 80 8L 22 RFO 1 22 21 TSO RF 18 C28 19 LVL FEO 85 CEOP FEO 18 0 1 05 _ 1 720 22 veo 12 T 56 87 VREFO 22 LDO 29 88 RFFGC 2 H Fa 23 1 89 AVDDT 14 24 90 gt j OSN 3 C34 NZ 10uH DIP R18 22 cae 92 COD AGNDT 77 100 120 T s3 3 Tw2 10 R19 22 34 a C39 88 DVDRFIN AGNDO H RFO NC 96 cat D 43 14 0805 DD REON ou A 10 0805 AA 98 1 4 1001 B 645 10 0805 99 Pee 10 085 100 RENE 3 1 i H 47 C48 MT1336E 100u 01 R20 R21 u2 R22 R23 1 080 1 0805 1 0805 1 0805 Li vork vorc 14 181 York Ha R24 285 VOLD VOSL 15 VOLD vost 220 55 20 PS5V 9 20 VNETK 1 par voce VCC
20. TDE F61PM 62PM 63PM 66P 68P 80P AVD F61C SERVICE MANUAL Dy Table of Contents COME 1 2 Basic Cincuit Did grant 2 Failure amp Troubleshooting of Power Supply 3 Troubleshooting and service Decoder 4 6 Meet ce eee eee 2 Figure 2 Basic Circuit Diagram MT1336 5954 DVD LOAD RE MOTOR DRIVE VIDEO LPF amp DRIVE 2402 PERRON SPDIF OUT MT1379 DECODER amp SERVO 2 16Mbit WM8746 MC4558 SDRAM AUDIO D A AUDIO AMP amp LPF IM 8 PT6312 PT2399 ECHO FLASH VFD KEY MC4558 MIC AMP PT2222 001 TEA1523P REMOTE HANDSET POWER SUPPLY 1 Troubleshooting and service of the Power Supply Board 1 1Principle of Power Supply Operation This appliance adopts a switched mode power supply which is assembled with the TEA1523P power switch module from Philips and is capable of protecting itself from over current over voltage over heat and short circuit The circuit mainly stabilizes a t 3 3v and fluctuate within a permissible range such 5V 12 12 3 3V and 24V Please pay attention to the high voltage inside the white s
21. VV ON C152 013 22 1 4148 4 118 1 8uH q C153 C154 014 220p 100p NC 1 4148 5 156 22 016 1 4148 4 BU Lig 1 8uH C157 C158 017 220 100 1 4148 CVBS sY sc RV Gy B U VGND RMAIN LMAIN LFE CENT RREAR LREAR A MUTE AGND AXIAL vec R76 10K R77 4 7K RESET 912 9014 gt gt cves 5 gt gt se gt gt VGND CENT RREAR LEAR 15 15 15 15 15 5 1235 5 5 15 5 5 5 AMUTE 5 AGND 5 1123 5 1245 VOC voc 1 2 Dv33 DV33 1245 GND GND L10 DV33 5033 117 118 0805 10 10 47 2 DCLK 2 DCKE DCKE 2 CAS 2 RAS 2 WE 2 cs 2 11 2 2 090 31 gt 0910 31 2 DOMIo 3 2 PCE 2 PRD 2 PWR 3 PWRE 121 Alo 19 0 19 12 ADIO 71 24 SCL SCL 24 SDA 5 SDA PCE PRDF PWRE vec Fvce R70 o R71 Nc _ 23 _ 24 2 4 DMAS 7 22 DMATI _ 35 20 _ 2 SDCLK 5 37 DCS DRAST DWE __1
22. er U1 U2 and adjacent parts are damaged or weld falsely e If the above parts are normal replace U1 or the loader c Read DVD discs only or read other discs beyond DVD only a Check whether the ribbon wire from 24P to loader is in good contact Check whether laser voltage of 2V outputs at pole of Q2 and whether the 125th of U1 is at low level Check whether the pins from the 1stto the 38th of U1 and adjacent parts are weld falsely damaged or erode d If the above parts are normal replace U1 or the loader 3 Troubleshooting and service of decoding part a No video no audio no display on VFD and no operation of keys a Check whether the power sources of the decoder board are normal b Check whether there is 27MHz signal output If not X1 crystal and adjacent parts are eroded or damaged c Check whether there is 81MHz signal output at R64 If not check whether there is short circuit false welding or alien substance for audio D Acircuit 05 and SDRAM U8 and 09 d Check whether the reset circuit composed of C7 R37 and D1 is normal constant OV after tens of milliseconds of high level If it is at low level constantly C7 R37 and D1 are damaged If the reset level is normal check whether the chip selection signal address data of the 12th pin of U5 are normal f Check U10 that whether the data of pins from the 1st to the 8th hsync and vsync signal of the 10th and 11thpins and
23. here are CS DATA and CLKsignals from CN301 on the front board Then replace PT16312 PT6554 under the condition that both of the above mentioned are normal 8 No operation of some keys on the front board disordered display on VFD Check whether the welding from the 12th 13th 15th pins of U301 to the 37th pin is in good conditions Check whether D301 D303 on the front board are damaged whether circuit is disconnected and whether R309 R310 and R311 are open 9 No sensitive remote reception or no reception from the remote handset Check whether the power source of the remote sensor is proper Check whether the remote handset is in good operation mode Use an oscillator to observe whether there is output wave from the 1st pin IR of the sensor after each pressing of keys on the remote handset If the remote handset is good while no output from the sensor the sensor is damaged 10 The machine can not be turned or off If the machine can not be turned on or off after pressing the STANDBY key the remote handset and the POWER key on the front board replace the main chip U3 Note The above information is only for reference If there is any mistake please feel free to point out
24. igital 3 3V SDRAM Flash VideoDAC VGND Video Ground DV33 Digital 3 3 MT1379E AV33 Servo 3 3V 1379 v25 Digital 2 5V MT1379E 5VA Audio 5V Audio DAC 5VV Video 5V Video FILTER 12V Audio 12V Audio filter AVS _oavss c2 1 MIC HL 0 10 220 t Li 3 MIC HR 0805 7 T 2200 5 2 5 12 FBAXIAL 3 6 4PS5V Paw 4 233 5 4 PTA 6 9 12 Ou 220 7 10 T PCON CON12 2 5mm ud 9 ie F 1 0805 10 13 Fr AVCC 11 14 724 ik lig 8050 gt gt ves 15 2 5mm SGND 14 FBAXIAL 55 4 0 10 100 2 T 220 0 10 D1 1N4148 9 65 10 URST R1 4 7k GND PS5V 12 DV33 AV33 V25 GND 5610 URST EE m 24V _ mom g mMm g PS5V 12 P12V RVCC AVCC 033
25. ilkscreen with the mark CAUTION on the PCB while repairing When using an oscillograph to check the circuit an isolated transformer must connected 1 2Troubleshooting and Service 3 3 voltage varies out of the permissible range Please check whether the sampling resistor R324 and R325 is eroded and check if the voltage of the first pin of the regulating fiducial 0303 TL431 is 2 5V If the deviation is over 0 15V then TL431 is defected or eroded and needs to be replaced When repairing do notloop 3 3V sampling circuit that is do not open circuit D313 L306 R324 R325 R322 0302 PC123Y U303 otherwise the output voltage will be too high and will damage the subsequent circuits IAll the output voltages are OV and the voltage of the anode of capacitor C305 is over 150VCheck whether 5V 3 3V 12V 12V and 24V are short Check if pin of U301 has 100KHz vibrating signal if not then U301 is eroded 1 12 5V voltage not normal while other voltages normalCheck whether D309 R315 L303 and ZD303 are open or short whether C315 C316 and C317 are short or leak electricity Any problem of these components will result in abnormal 12V and 5V voltage Open circuit or short circuit of D312 L305 ZD305 R319 and Q304 and electricity leakage and short circuit of C324 C325 C326 C335 and C328 will result in abnormal 5V voltage 24 and AC1 AC2 voltage are not normal while other voltages are nor
26. malCheck whether R311 D307 D308 R313 R312 and R314 are open or short whether C312 C313 and C314 are short or leak electricity output voltages are under permissible range refer to 2 2 of Chapter one Check whether ZD 302 C308 and R303 are defected or eroded If 3 3V output is normal and other voltages under range check if the appliance is instandby mode In standby mode it is rational that all voltages except 3 3V are not normal If in playing mode 3 3V output is normal 5V outputis OV or too low please check whether 5V is short circuit and whether R320 Q305 ZD305 D312 R319 C324 C325 C326 C328 and C335 are defected or eroded 2 2 Troubleshooting and Service of the Loader a No running of loader a Check whether the 24P ribbon wire toloader is in good contact b Check whether 5V voltage is normal Check whether laser voltage about 2V for VCD and 2 2V for DVD respectively exists at the pole of Q1 Q2 and whether U2 and adjacent parts are damaged or weld falsely d If the above parts are normal and no laser emits replace the loader b Read no disc a Check whether the ribbon wire from 24P to loader is in good contact Check whether the RFO signal of the 10th pin of CN6 is transmitted to the 96th pin of U1 c Check whether laser voltage about 2V for VCD and 2 2V for DVD respectively exists atthe C pole of Q1 and Q2 and whether the voltage is normal d Check wheth
27. n good conditions Check whether the output of C poles of 018 and Q19are at high levels constantly If so 018 and Q19 have been broken down or C209 are short d Check whether the six audio signal lines on the 20P ribbon wire from decoder board to output board are in good contact If abnormal replace the ribbon wire Check the signal reaching the input of U12 U14 If the input is normal while the output is not replace the operational amplifier IC Check whether the signals ofthe 17th 19th 21st 23rd 25th and 27th pins of U5 onthe decoder board normal not check the signals of the pins from the 2nd to the 7th If the clock signals of ACLK ABCK and ALRCK output by U3 normalafter R130 2 and R131 disconnected replace 011 b Distorted audio and loud noise a Firstly check whether the 8V and 8V power sources for the operational amplifier U12 14 are normal Check whether the muting tubes are in good conditions Check whether the signals ofthe 17th 19th 21st 23rd 25th 27th pins of U11 on the decoder board normal If not check the signals of the pins from the 2nd to the 7th If the clock signals of ACLK ABCK and ALRCK output by U1 are normalafter R130 RN2 and R131 aredisconnected replace U5 c Pop noise during ON OFF Check whether the MUTE signal line on the output board is broken then check whether Q18 Q19 muting tubes and adjacent parts are damaged or eroded
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