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SERVICE MANUAL - Wiki Karat

1. 4 C1 5 0V DC 13 1 6 DC P2 P140 8V1 DC V15 Fr P14 0V6 DC NL V il tary
2. SSSSSSZ ANNAN ODL AS DODOOSORARRRGSRGQOORWO DIO WOO CHEN ANNAN EF O
3. CONTROL CINCH CINCH ROUND PROCESSING UA aisi CVBS ud BTSC DECODING SOUND AMPLIFIER 45VD be 714 7118 O ao INI 1 1 CHROMA O NTSC S i STOUT wre gt WA EFT oUF EEN 2 2 gt 2 LEFT IN1 15 3 A5 M41 VTUNE lt 15 7113 7117 gt As so MOER A7 2 VOLUME 15 asi MUTE gt E es MOD A6 3 MONO STOBE BG 16 5 SCL CVBS EXT2 5 5 16 gt d 7115
4. 4 C1 5 0V DC I34r 1 6V DC P2 P140 8V1 DC V15 1 DIER 4 0V DC P140 ove oc ARS De P15 5V DC 0 5 div AC 15 0 5 30V DC 5V DC P150 DC 500mV div AC 0 1ms div 5ms div 10us div A5 C2 17 P3 51 V15a tum 15 _ 0 5 div AC 1V div DC 50mvV div 0 2V div DC 2V div DC 500mV div 0 2ms div 0 1ms div 500ms div 5us div 20us div 10us div A6 C3 L1 V1 V15b H 77 A Pini ii jama i 5V div DC 1V div DC 100V div DC 0 1V div DC 500mV div 500mV div AC 10ms div 0 1ms div 20us div 5us div 106 div 10s div A7 L2 v2 V15c en E 50mV div 1V div DC 2V div DC 2V div DC 4V div DC 500mV div AC 0 2ms div 5ms div 20us div 5us div 10us div 10us div 5 12 MHz L3 V16a C6 5V tt
5. mp a Hon CN IN IN od 251 M KO o Ko 52 om NUN oo 9 2281 IN NN Ok Gi NN ee CN Gi LN ou 2 NINI ed del IN 22 TON 3222 2210 2213 2214 2215 2216 2217 2220 2221 2222 2223 2224 2225 2226 2227 2231 2232 2239 2240 2242 2243 2244 2266 2271 2272 2273 2274 2276 2277 2278 2279 2280 2281 2282 2283 3222 3243 3244 3248 4210 4211 4215 7209 7215 7216 7 Diagrams and print lay outs
6. C7 E2 C60 F2 C81 A8 CRT PANEL B7 C84 B7 2830 A5 2840 G5 V15a 2841 D6 2843 F6 2844 G2 AQUADAG 2845 F6 fr 200 4200V WIRE 3831 B5 3832 86 H 3833 B5 3834 86 3835 B5 CRT Socket 3836 n Pu AC 5 IV 3841 C6 u 84 3842 D6 3843 E6 3844 F6 V15b 3845 F7 3846 F6 5840 G4 5842 C6 6831 A5 6833 A5 6835 AG 7830 7830 C2 TDA6103Q N3 id 500mv div 10us div MIRROR 2 SES V15c MIRROR 3 CURRENT Diversity of CRT Socket VBIAS Y Y 5 Y C84 for Brazil only 29 only B C83 for other regions d LEVEL FERENTIAL LEVEL SHIFTER 1 SHIFTER 2 i THERMAL 500mvV div MIRROR 1 PROTECTION 5 10 5 div V16a 20V div DC 10us div BC INFO V1 6b GNDSS FROM EHT INFO HL DEFLECTION LJ gt 200V TO sal 2 GNDIS due 20V div DC 10 div 2844 100p V16c GNDLS GNDSS T IR GNDLS Large Signal Ground GNDSS Small Signal Ground 20V DC 10us div CL 86532018 009 AI 270398 CL 86532018 020 010498 7 Diagrams and print lay outs 1 2 NICAM PANEL 3 BZX79 F5V6 STANDBY LEFT OUT RIGHT OUT 2v2 1 7202 MSP3410B CL CW DA D OUT D CTR OUTO ADR SEL STANDBYQ D CTR IN
7. DIO CO NS NA 000000000 0 09000 0 O OO O OO OO ODmmEILEEZmEmmZmZmUTOQOO CCCNCOCONCNCOICNPADUXtOCQOUQLUXCQOOQO KENNEN EE ME E EE E EE EE AE MJM ME EE EE EE E ss abah tt sl sl LA EE DEER en a Lo _ 9846 _ Di gt gt oO gs R SR GER 0106 CEN Esra P a BM B ff em wf 9 lol e JOP S Sy 00674 3 5 E siitia El T m bg M vOve E L 02 de E Org 2 Zerg c9 56072 JR s CENA 250 H Bis 33 _sove_ p o 3 2 95 N be Cl RI 5 Te TA oF uz S 8 a 9 lo E xw 8 ga 5 oy IS E FIM a Si T 2 2 ed BS 5 mE S Se S 68vZ 80 2 20798 E gt al Le 1254 Ser 5 Sot p to gt O
8. e CH IN 8 Cy wl 255455455355 2321237238 3329 535 731 23512529 252052 io N m NI 23672380 28 kol oy D SS 0192 CT am 3 py 0994 B B D BETESTZ B lt A ol d 80 Ecg 3 ee E E E 83 B 1594 2 7 Diagrams and print lay outs M5 B5 6487 F8 1 2 3 4 5 6 7 8 9 10 11 60 G11 6488 C7 2448 E7 6489 C9 2450 B4 6490 E7 ES LINE DRIVE 245185 7460 2456 1 7461 G2 2457 D6 7470 G3 DIVERSITY TABLE FOR ALL ITEM NO MARKED WITH 2458 D6 7480 C9 PHILIPS TUBE PHILIPS TUBE PHILIPS TUBE 2459 C5 7481 G6 25 W 29 EW 29 W 2460 G1 7482 D8 2457 390n 390n 360n 2461 F1 9451 A6 2463 in 560p 820p 2462 5 Se 463 F4 460 E5 2464 9461 F5 2485 ent 2465 4 9462 E5 2466 ss 2466 F4 9463 F5 247 EHT INFO 2467F4 9464 F6 2468F5 9487 F8 246908 1 40 4 2470 2470 G3 2471 E Wan 2471 G4 2472 G4 1 2451 3451 2490 2473 G5 ae Er 2475 5 2 2475 470 EU pe vi LOT 2480 B9 2887 for ITV purpose 6486 2481 G7 2484 C9 EU 5445 BYV27 200 2485 F9 um 1372 0017A 2486 B9 3472 HORIZONTAL 6488 ee Se BC337 25 3473 can ET 2489 E8
9. Te 2 4 5 Ae m sii Burssaud nuaw ue Salat J au dn UE nue w punos y u31IMSs 55914 AL punos u MS INW CAN 10 5 S euueup 309125 JeuJ93x3 0 m P 6 sseud uo OL dn 53461 403e ipui pue AJ HO 41 5 5 nua e punos pue Co Jeuueup Ae dsig usS125 Ee nen 55944 AL y uo 105 25 seu 3 0 104 0J3002 y 5 aa 28 55 53 0 5 5 SEARCH VHF lp FINETUNE eben CHANNEL STORE To call up the 1st level menu Press key To use the menus Press the cursor keys a 4 _ e Sas fay VAS Se scroll up scroll down select or execute To exit from a menu Press key to go back to the previous level OR Press e key to exit 10 Installing the TV Selecting the menu language Tuning in the TV channels 1 Call up 1st level menu with the key Scroll up with the lt gt key to hi
10. Aen Ges sseJd 9 jequunu 03 usiM j e uo Aen gt ssaJd Jaquunu 763 jeuueup snoad peq 03 Ji pue 9 Jequunu e Aen eu t Ae lt 10 S gt au Paes June 34646 o Aen SZ2 dn 1045 Ae eu nusu IST dn leuueup 351 uns UsIM 10 Z 0 T daysyeaday 351 HNS palajap s jeuueu sueaui 5141 jauueyd 331313G peAejdsip 113 5 jequunu 10 SPUODAS Ae Bech aul ssaud YSIM DUU se uoos sy 77 7511 HNS ut sjauueyp dn o3 Aen C2 euisseJd En 35 uns e woy spguueup vv m SSINIHO TE 4 HON 4 NOUVTIVISNI 3915 SS g HO Ft SSINIHO HH NOLLVTIVISNI 4 Gama 3975 SaJnjeaJ 49907 351 jans uo sjeuueup 01 lt gt DIOU pue ssaJg HON 3905 350 HNS uo si 5 U2IUM IM
11. 1896 _ 999 651 1600 160 1602 1605 7 Diagrams and print lay outs 3 4 POWER SUPPLY FOR USA ONLY BC858B 7588 al DEGAUSSING COIL 5574 5572 10 11 12 202 100MHZ 6501 6500 BZX79 C30 5500 3 NU MAINS 150 276 SINGLE RANGE 90 276 V FULL RANGE 1 4 DMF 2405 9509 A BZX79 C20 6515 BYD33J 6517 BYD33J 100MHZ STH8NA6OFI 7518 1 1 7520 MC44603A DEMAGNETICATION MANAGEMENT REFERENCE BLOCK vret re T SUPPLY amp INITIALIZATION BLOCK Vdem out Iref Vosc prot Sync BY229X 600 N 100MHZ 7541 TDA8139 A 7581 CNX82A er OSCILLATOR Vosc Festandby Dead STANDBY fset Q 15V1 5 1 1014 Latch 3 fReset REDUCED FREQUENCY ovp out THERMAL SHUTDOWN Vref He 2 5 VOLTAGE E A OUT FOLDBACK FOLDBACK INP CURRENT SENSE INI CURREN FEE
12. 6472 1N4148 1 4148 9461 151 5463 E CU15 6449 P 220 3448 9462 7460 ae E BU1508DX 9464 2 CU 2465 6450 gt 1N4148 134148 8K2 6485 gt BYD33D 2466 2u2 2485 A 9464 BYW95C 20 BY228 20 V 3470 5471 7481 1N4148 BZX79 C39 SCH 8473 ou ran BC557B RES RES 37 5480 C8 5487 F8 3473 6472 1008 6449 E9 6450 E9 1K 7470 1N4148 6160 E7 MTP3055EFI 5 u 6461 F4 14 6463 07 6464 09 6465 05 6466 05 6467 010 6470 G3 6471 64 6472 G5 6473 G5 6480 G7 6481 G6 CL 86532018 013 6485 F7 010498 6486 B7 BEAMCUR PROT BZX79 C9V1 EWDRIVE L6 L8 5 0V DC L9 11 7V DC 100V div DC 2V div DC 200mv div DC 5 div DC 20Ls div 20us div 10us div 5ms div CL 86532018 003 AI ae SYNC FRAME VERTICAL DRIVE 2 Diagrams and print lay outs 3 EHT INFO SYNC 3423 6420 6421 Ki e BC857B A4 37 2 2 21 BZX79 C47 Lc 3420 7420 1M 722 TDA8374C N3 5
13. lt mn MOD R IN2 A6 4 BG L or BG DK 18 VIDEO IN2 7 _ gt Li A4 5 BLACK STR SW 6 422 gt VIDEO OUT m es A670 7 S AA MOD RINI A6 6 A7 6 SID STA LL T 5 4 18 nn LEFT IN2 m 8 8 DCS A640 MOD A845 TONE A6 7 A7 7 INT EXT lt ER 10 _ MOD IN2 RIGHT IN2 CONTROL 9 9 ke lt 46 A6 8 STAND BY 5 VD oft ALS 10 10 A7 9 TREBLE C6 A7 9 m lt 1 RESET 1 19 sat d A7 10 BASS m X TAL SERA 58 s A5 16 46 11 AV MUTE lt lt 12 2 Ae HEADPHONE SPEAKER SWITCH ABS 13 16 MOD_L_IN1 diet 3143 A5 15 ONZE MOBLIN ac 9 11V LOT LOCAL D Le CHROMA4 BGIL 4 17 AT o REH KEYBOARD 16 o ALC m lt VFL 20 A4 27 851 FLYBACK A2 21 A3 21 s em A4 28 852 lt 18 18 gt gt BL 050 4 22 e 4 C SD STALL b 4 SISTA as A6 8 STANDBY 19 19 R TXT OSD 4 23 5 At 26 00 20 G 080 4 24 oe ANE ona x E 21 B TXT 080 M 25 0 8 68 STANDBY AVL M28 22 SERVICE eg 23 CVBS SOUND 8 36 SAM M29 MODE Le 24 7600 TXT 25 TXT 2108 26 84 13 8 BG L D BG DK 5 4 T gs m VIDEO PROCESSING 8 8 8 8 8 CRT MODULE 4200VA BIMOS 1C i 58 2 P 7225 E 8 o 8 TDA8374C 8 o o Vi5b V16b 8Vb 5 13 Y 28 8 5260 yo o 17 g
14. E Scroll down with the 22 key to high light MANUAL Select MANUAL with the lt or gt key Scroll down with the 22 key to high light SEARCH Select the band UHF VHF1 or VHF3 with the lt key Press the gt key to start searching Searching stops once a channel is available If you decide to store the channel proceed to the next step If not press the gt key to start searching again If you wish to fine tune the channel scroll down to highlight FINE TUNE Press the lt or gt key to fine tune Scroll down with the key to high light CHANNEL and assign a channel number to the channel that you found Scroll down with the key to high light STORE and press the lt or gt key to store the channel ep Exit with the C key 13 installing the tv How to deal with poor picture reception You can use these 3 ways to deal with poor picture reception of your TV Skip channels System selection for multi and dual system sets only Finetuning Do the following steps to go into INSTALLATION menu 1 Call up 1st level menu with the key 2 Scroll up with the 255 key to highlight INSTALLATION 3 Select INSTALLATION with the lt or gt key Skip channels This menu enables you to skip channels which have bad reception or channels which you do not watched often Once a channel is skipped you will not be able to select it with the
15. NOM NP FUGO DOT CN FLOGO T XOXQ O OY OO C NILO 0000 FE 1 0OOOOOOOQO NNNNNOO MONI T SE SE SE SE tOCOCOCDCOCOCOCOCOCO CDCOT eessen ee ee 0000090000000000900000 09020000000090000000 020000 02000 0 00090000 090000 0900000 0000000000000900000 09000909000 090900O9O OY SERO ERO LON NINMMANAN AR MINAAAISR ORE KEEN NAM TAN HNNN s EE HOA D T LOLA EECHELEN ENEE OOOOO00O0O000O0O000900000000000XO000O00O000LU000X 00O000LJOLJ lt lt lt c O0 am omoomgooO0O0O000LJOOO0O00ulOo0O O000O0O000 0000 06000000 O LLL LAINN lt lt 0000000 c c 00 0t T0000 NOMONOM NMI CNILOT UO DO DO CNICO T CO CNILOT C CO TT TAMNONOO TROND O CO OILXO00 0 OUO Co CIO NOR 000 2 10 erkritt eet tegt tegt ISIN IN III NOR INI IIIS INDI OU Eeer Ee feele Eeer NANN e Zeie e Lee e Leier Lee e OOO OOWOOQOOGOOOOOOWOOOOOCOUOO eet E EE eege Ee E EE EES OR DEE Ee ees tee EDERT DEENEN ee eege ee MIMS TT ee UO COT T P
16. e Viathe DEFAULT button on the Dealer Service Tool service codenumber 4822 218 21232 e ViaShort circuiting the service pins M24 and M25 on PCB and switching on the set via the mains switch For M25 and M24 see Diagram A4 and the PWB drawing of the main panel In the SDM mode a S in green and the menu in red is displayed see Fig 1 SAM In the SAM mode you are able to align adjust settings via menu selection To entry the SAM Service Alignment Mode there are two possibilities Viathe ALIGN button on the Dealer Service Tool ViaShort circuiting service pins M28 and M29 on PCB and switching on the set via the mains switch For M25 and M24 see Diagram A4 and the PWB drawing of the main panel In the SAM mode a S in green and the menu in red is displayed see Fig 2 REMARKS After the set is in the service mode the short circuit can be removed 5 4 5 5 L73AP21 1 0 To leave the Service mode press the stand by button on the remote control REMARKS After switching off and on the mains switch the set remains in the service mode SDM or SAM mode Features are Service settings after entry Service sub menu selection Error buffer display Software version and identification display Life timer run timer display Option bytes Initial states The initial state after switching on in service mode for System and Tuning are as follows Multi System se
17. 13544 2542 He i 69 48V 4140V FOCUS UE 2422 GE DC X 6590 82 X zs 7518 3420 SYNC H DRIVE TO 42 7225 D 7460 EHT INFO l gt 10V 14V TDA8374C BU1508DX 150 pio eso 7225 9D N337 7461 ge nVLor MC44603AP TDAB8373 74 6486 2486 7 T ds m gt EW DRIVE TO A2 43 ge E 3 D gt 140V VBATT m 6488 2484 gt gt 2551 5551 VERTICAL m gt VFB 5 20 22 LY WY 40V VBATT 4 HEATER 5 GC A4 33 SANDCASTLE lt 5480 P13 HEB SS e ech E Gan vam LOT SCH 6463 T 3466 8 i 6464 2 6401 2403 2469 XRAY gt 13V PROTECTION 3528 448V LOT 6467 12 15 lt 4 ONLY FOR 29 3467 es E d 5403 EW CONNECTION 5457 E 29490 m soni Kee 7401 B gt 11V LOT TDA9302H TDA8139 EKINO 3439 3438 spe RM COT T 6449 P9 9 E 2563 A5 21 0 6 STB 3448 3449 26450 20010 gt 81 A2 41 X RAY PROT 7470 5470 5 gt CRT PANEL 3 L d sam emt i 6465 6485 3485 SE aa i 4 2562 3574 1 i 5463 V p gt 48V LOT A5 19 1 A 2404 2404 gt n VH 3577 STANDBY ET V H H 11V LOT 2 ADJUST A5 26 EW DRIVE 6480 140V FROM A3 43 PROTECTION A5 12 8 653201
18. 220nF 20 25V 220uF 20 25V 15pF 2 63V 15pF 2 63V 15pF 2 63V 47nF 10 50V 47nF 10 50V 47nF 10 50V 470nF 80 20 16V uF 470nF 80 20 16V uF 470nF 5 470nF 5 50V 470nF 5 50V 470nF 5 50V uF 470nF 80 20 16V uF 470nF 80 20 16V uF 5 6nF 10 50V 20 16V 1000F 20 25V 20 16V 20 16V 20 16V 2349 2351 2353 2354 2355 2357 2359 23694 2383 2385 2387 2388 2401 2402 2403 24044 2409 2409 2422 2426 24484 2450 24514 2451 2456 24574 24574 2458 24594 2460 2461 2462 24634 24634 24634 2464 24654 24654 2466 24674 24684 24684 2469 2470 2471 2472 2475 24804 24814 2484 2485 2486 2487 2488 2489 2490 2491 25004 2501 25024 25044 25054 25074 2508 25084 25084 25104 25114 2517 25184 2524 2530 2531 2540 2541 25454 25504 2551 2554 25604 2561 2562 2563 2571 2575 2601 2610 2615 2650 2660 2661 2680 4822 126 13473 4822 126 13482 4822 124 81151 4822 126 13473 4822 126 14043 4822 126 13482 4822 126 13482 4822 126 12944 4822 126 14043 4822 126 14043 4822 126 13482 4822 122 32646 5322 121 42386 5322 121 42386 4822 124 40255 4822 126 12171 4822 121 42408 4822 121 42868 5322 122 32331 5322 121 42386 4822 122 31173 4822 124 41739 4822 122 30103 4822 126 13513 4822 121 43526 4822 121 10518 4822 121 43888 48
19. 33uH 10 8X10 27H LIN CORRECTOR COIL LINEARITY CORRECTOR COIL LINE DRIVE TRAFO CU15 RIDGE COIL C115 RIDGE COIL U15 TRANSF 11H ww 5471 4822 5480 5322 5500A 4822 5502 4822 5502 4822 5515 4822 5516 4822 5518 4822 5520 4822 5540 4822 5545A 4822 5545A 4822 5550 4822 5551 4822 5572 4822 5573 4822 5574 4822 5574 4822 5603 4822 5620 4822 gt 6040 5322 61124 4822 61144 4822 62634 4822 62644 4822 62654 4822 6401 4822 6402A 4822 6403 4822 6421 4822 6460A 4822 6461A 4822 6465 4822 6466 4822 6470 4822 6480 4822 6485 4822 6486 5322 6487 4822 6488 4822 6490 5322 6505A 4822 6505 4822 6507 4822 6508 4822 6511 4822 6514A 4822 6515 4822 6517 4822 6550 4822 6560 4822 6570 4822 6590 4822 6653 4822 6663A 4822 E 7001 5322 7002 5322 7008 5322 7004 5322 7005 4822 7101 4822 7115 4822 7117 4822 7118 4822 7204 4822 7214 4822 7215 4822 7216 5322 7217 5322 7220 4822 7225 4822 7225 4822 7225 4822 7225 4822 7255 4822 7260 5322 7277A 4822 7278A 4822 7310 4822 7311 4822 7312 4822 7314 4822 7315 4822 7317A 4822 7401 4822 7401 4822 7420 5322 7460 4822 7461 4822 7470 4822 7480A 4822 7481 4822 7482 5322 7518 4822 57 11547 57 51687 57 11523 57 10476 57 11538 57 11477 57 60171 526 10704 526 10704 57 71249 46 10964 57 11529 57 60171 57 71401 57 60171 57 60171 57 11327 57 11408 57 11524 57 11525 30 34955 30 83757 30 83757 30 83757 30 83757 30 83757 30 42
20. As soon as Vpin 1 14 5 Volts DC the SMPS will start up This will be done by a slow start procedure where both the frequency and the duty cycle will be built up The following three phenomena s will take place during start up The frequency will slowly increase to the nominal frequency of 40 kHz for normal operation and 20 kHz for standby This is realized via the demagnetization function at pin 8 via this DEMAG function FET 7518 will only conduct and T on will become high when T5545 is totally demagnetized The voltage at pin 5 determines the foldback point As during start up this pin 5 is gradually built up the foldback point will also gradually increase see foldback principle explained at overload protection The duty cycle will slowly increase beginning with the absolute lowest possible duty cycle The maximum duty cycle is determined by C2530 at pin 11 of 107520 as C2530 is unchanged at start up Standby mode In standby mode the load will get under a certain threshold level decrease see description of standby on the secondary side The SMPS will determine this threshold level and switch tothe so called reduced frequency mode at about 20 kHz this minimal load threshold level is determined by R3532 at pin 12 In the L7 3 chassis the SMPS does not have a burst mode in standby but only a reduced frequency mode of about 20 kHz In normal operation mode the internal oscillator is about 40 kHz This frequenc
21. Sound IF signal for FM demodulator Switching signal from uC low for standby power supply will be switched to stand by mode high for normal operation Treble control signal Tuning voltage for tuner Vertical flyback pulse 50Hz vertical flyback pulse used to inform the uC that flyback takes place This is important for OSD and TXT Voltage on grid 2 of the picture tube Control signal from uC but on DC level via RC nework for volume control of sound processing in sound panel 12 Spareparts list Mainpanel Various 0136A 4822 492 70289 0139A 4822 276 13603 0140A 4822 256 92053 0141A 4822 265 20723 0142A 4822 265 20723 015 4822 256 10336 0177 4822 492 70788 0189 4822 402 10844 019 4822 267 31014 019 4822 267 51391 0210A 4822 492 70289 0211A 4822 492 70289 023 4822 265 10453 1000A 4822 210 10737 10004 4822 210 10771 1000A 4822 210 10803 1000A 4822 210 10804 1000A 4822 210 10814 1007A 4822 212 11691 1015 4822 242 10357 1015 4822 242 10874 1015 4822 242 81556 1015 4822 242 81964 1102A 4822 242 10316 1104 4822 242 10314 1104 4822 242 10362 1104 4822 242 10363 1206 4822 242 81572 1207 4822 242 81712 1207 4822 242 81978 1208 4822 242 81301 1209 4822 242 81978 1275 4822 242 10327 1275 4822 242 10356 1275 4822 242 10695 1277 4822 242 10355 1277 4822 242 10776 1278 4822 242 10326 1300 4822 242 10359 1500 4822 070 35002 1572A 4822 071 51002 1600 4822 276 13775 1601 4822 276 13775 1602 4822 276 13775
22. amos anbi pews ims 10 S ouueup 129 95 01551 40J puodas 10 3544 250092 10 uoissiuusueJ 094215 104 punos 0 024935 UJOJJ U2331MS punos RND 0550 O Q uwo amp 1 UO 5 0 uonpuny HN snoad dE y HD V 351 HNS Main 151 HNS jouueu sead desip ysep 15 jejeuunu puo2es aui 316ip z e 104 ui pue Jenuepyuoo s ejeuunu uba e3noaxe 10 29 95 4osun2 395 au 3ueunsn pe asnfpy AL eunjoA Mnsoy 1 Duren 8 umop 10 JO dn 0225 nuauu e dn 1051 5 gt Jagumu 19 uolpea as D 10 Palas AL BY UXO SlU 55 nua IST U J
23. AN 14 GN DE P150 5V DC E 0 5V div AC 15 0 5 30V DC 5V div DC 150 DC 500mvV div AC 0 1ms div 5ms div 10s div A5 C2 17 51 V15a y n H Im 0 5 div 1V div DC 50mvV div 0 2V div DC 2V div DC 500mV div AC 0 2ms div 0 1ms div 500ms div Bus div 20us div 10us div A6 L1 Vi V15b fil Ft Ein Ge Hil 5V div DC 1V div DC 100V div DC 0 1V div DC 500 div DC 500mV div AC 10ms div 0 1ms div 20us div Bus div 10us div 10us div C4 L2 v2 V15c mm n i fH i IM Gi El 1V div DC 2V div DC 2V div DC 1V div DC 500mvV div AC 5ms div 20us div Bus div 10us div 10us div C53Vtt12 MHz L3 P4 V3 V16a C6 5V tt 12 MHz HH EEEH 50mV div 200mvV div DC 2V div DC 500mV div DC 20V div DC 0 2ms div 10us div 5us div 10s div 10s div A9 F1 L6 P5 13V DC 4 V16b Gel P5 11 5V DC 4332245 GE 50mV div 0 5mV div DC 5V div DC 500mV div DC 20V div DC 0 1ms div 5ms div 5ms div 10s div 10s div A18 aq 1 2V DC F2 L8 5 0V DC Pe V11 V16c A18 mK OV DC L9 11 7V DC Mer ux Ih dp PSS ji L10 194V DC 0 5mV div DC 1V div DC 200mV div 20V div DC 5ms div 5us div 10s div 10s div F3 P1 D270VDC P6 V12 P gn D gt WAN 50 div AC 10V div DC 1V div DC 200mV div AC 0 2ms div 5ms div 1
24. CL CVBS SOUND MOD R IN2 MOD L IN2 STANDBY 2 DA 125 125 ws 125 DA OUT 125 DA IN MOD R IN1 MOD L IN1 IN 1 MONO VREFTOP SCH IN NICAM 2CS MULTI CVBS SOUND 1 00 2228 10 2220 MOD IN1 220n MOD L IN1 MOD IN2 MOD IN2 LEFT OUT RIGHT OUT 10 11 12 CL 86532018 021 010498 C2F3 C3 D3 1204 C7 2210 C9 2211 F7 2212 E7 2213 C7 2214 C8 2215 C7 2216 E7 2217 E8 2220 D7 2221 D8 2222 D8 2223 D9 2224 D8 2225 C8 2226 C8 2227 D7 2228 D7 2229 F7 2230 F7 2231 G7 2232 E5 2234 F5 2237 F5 2239 G5 2240 G5 2241 F7 2242 F7 2243 F5 2244 F5 2261 B4 2262 D8 2263 A2 2266 B3 2271 G4 2272 G5 2273 B3 2274 B4 2276 C5 2277 D5 2278 D5 2279 C5 2280 E8 2281 E8 2282 E8 2283 E8 3216 C5 3217 D5 3222 D9 3224 3243 A3 3244 B3 3246 C2 3247 A3 3248 B2 3250 F3 3254 B2 4215 D8 5203 A2 5204 B5 5205 B5 5206 D8 6204 F5 6205 B3 7202 B6 7209 B4 7214 7215 B3 7216 C3 4 1V DC 2 4 2V DC 0 2m s AC CL 86532018 011 020498 8 1 8 1 1 Electrical adjustments Notes Unless stated otherwise the supply voltage used is 220 to 240v 10 50 60 Hz 5 Voltage and oscillog
25. 3431 C7 3436 C7 3437 E5 3438 D5 3439 E5 3440 E6 3441 F6 3442 D5 3443 E5 6401 E9 6402 D9 6403 E10 6420 B5 6421 B5 7225 D C5 7401 E8 7420 B6 9401 E9 Diagrams and print lay outs A4 CVBS INT 2 3 VIDEO PROCESSING BIMOS IC PAL NTSC SECAM PROCESSING 7225 E Ref Des A5 13 A4 32 USA 7204 3255 CVBS TXT CVBS OUT 212010891663 1K BC847B zm 212010891663 1K 3257 212010891663 1K 9203 CINCH 212010891663 1K VI TDA8374C N3 13 4 29 CVBS EXT2 A6 30 CVBS_EXT1 KR 6 31 CHROMA A5 18 CHROMA 1 PAL NTSC STATUS ONLY FOR TDA83 3M575611 7225 C TDA8374C N3 5 17 CHROMA 0 NTSC S 4 14 R Y OUT 4 34 GY B Y OUT 4 35 SDA HC 49 U 15 3 575611 FOR TRINORMA ONLY 8K2 TUNER SAW BANDSWITCH pn LOT 506 y4 5003
26. 3552 E10 3553 E10 3554 F9 3565 Ell 3571 F9 3572 F9 3573 F9 3574 F8 3575 F8 3576 E8 3577 F7 3578 F7 3585 E8 3595 A6 3596 A6 4500 F11 4501 G2 5500 B4 5502 B4 5 AT 5550 B9 5551 5572 A9 5573 C8 5574 A8 6500 B4 6501 B4 6505 B5 6507 G6 6508 G6 6510 C4 6511 C7 6514 C6 6515 B6 6517 B7 6540 E7 6542 C10 6543 C10 6550 B10 6560 C8 6570 A9 6584 A5 6590 A9 7518 C6 7520 D2 7541 D9 7542 7570 G8 7581 E8 7588 A6 9500 B2 9501 C2 9502 B4 9503 C4 9504 B3 9505 B5 9506 B5 9507 A10 9508 B4 9509 C4 P1 270V DC P1 270 DC P2 P5 13V DC 11 5V DC Pe 5V div DC 5ms div P2 1V div DC bus div Pe 5V div DC 5ms div LT 0 2V div DC bus div TESTS 0 1V div DC bus div 2V div DC bus div P4 2V div DC bus div 1V div DC 10us div P9 2VDC 10 120V DC P10 120V DC P110 14V DC P11 14V DC P130 10V8 DC P130 10v2 DC P140 8V1 DC P14 0 6 DC 15 5V DC P150 5V DC CL 86532018 002 AI 270398 7 Diagrams and print
27. 47uF 20 160V 22nF 8096 63V 8 2nF 10 50V 47nF 5 250V 250V 390nF 5 360nF 5 250V 10uF 250V 680pF 10 500V 6 8nF 10 B 50V uF 1nF 10 500V 47nF 5 250V 560pF 10 2KV uF 1nF 10 2KV 820pF 10 2KV 2 2uF 5 160V MPP479 8 2nF 5 1600V uF 9 1nF 596 1 6KV uF 10nF 1096 400V uF 22nF 1096 400V uF 18nF 1096 400V uF 33nF 1096 400V uF 1uF 1096 63V uF 470pF 1096 500V uF 470nF 596 63V uF 2 2uF 20 50V uF 560nF 5 250V uF 100nF 1096 250V uF 470nF 596 50V uF 100nF 5 63V uF 4 7uF 20 250V uF 470uF 16V 20 85C DXH 8X11 5 uF 220uF 20 uF 470uF 16V 20 85C DXH 8X11 5 uF 470uF 20 35V uF 470pF 1096 500V uF 470pF 1096 500V uF 470nF 275V uF 5 400V uF 2 2nF 1096 2KV uF 2 2nF 1096 2KV uF 2 2nF 1096 2KV uF 1 5nF 1096 1KV uF 330uF 20 450V uF 220uF 20 400V uF 330uF 400V uF 1 5nF 10 1KV uF 220pF 10 1KV uF 1nF 10 100V uF 470pF 10 1KV uF 330pF 10 63V uF 1uF 20 uF 1nF 2 50V uF 100uF 20 25V uF 2 2uF 20 160V uF 1 5nF 20 250V uF 330pF 10 R 1KV uF 47uF 20 160V uF 220nF 20 25V uF 330pF 10 R 1KV 16V S 1000uF PM20 uF 220uF 20 16V uF 100uF 20 16V uF 2200uF 20 25V uF 100nF 10 63V uF 220nF 20 25V uF 220nF 80 20 50V uF 220nF 80 20 50V uF 470nF 80 20 16V uF 680P 5 50V uF 680P 5 50V uF 220nF 20 25V 2684 3171 3178 32344 3249 3277 3342 33464 33604 3401 3402 3403 34054 3405 34074 3407 34094 34304 3
28. 5 15 A4 15 SCL A5 16 4 16 BLACK STR SW 55 B OSD A525 G TXT OSD A524 TXT 050 A523 BL TXT 0580 5 22 CHROMA 0 NTSC SW 4 14 TUNE OUT UV1300 5 852 AS 8 x for VST tuner only Bandswitch 12p 3042 PAL MULTI ONLY 34 4MHZ TRAP CHROMA 0 NTSC SW 6 8 9 10 11 12 M7 D9 3223 E5 1000 F3 3224 E5 1015 G7 3225 D8 1206 D10 3227 D7 1207 D10 3229 D8 1208 E10 3234 F9 1209 F11 3248 A7 1275 C3 3249 B7 EUROPE 1277 C3 3251 A8 NOR SEB E 1278 D3
29. 7620 A11 7650 F2 7651 E2 7681 E10 7682 E10 9610 E9 9611 E9 9612 F9 9613 F9 9614 F4 9615 G4 9616 A10 G11 IM32 G2 IM33 C12 IM37 G11 IM38 C9 C1 5 0V DC C2 1 div DC 0 1ms div C3 1V div DC 0 1ms div C4 1V div DC 5ms div C5 3V tt 12 MHz C6 5V tt 12 MHz CL 86532018 006 020498 7 2 3 Diagrams and print lay outs LEFT OUT RIGHT OUT Ka for ITV purpose IM36 d SCL Ha CVBS SOUND MOD R IN2 MOD L IN2 RI tod Lt RIGHT OUT CINCH CONNECTIONS CVBS_EXT1 VIDEO_OUT VIDEO IN1 STANDBY AVL o MOD RINI MOD 46 INT_EXT RIGHT_OUT LEFT IN1 SID STA LL Lh CVBS SOUND lt Ref Des MONO STEREO 3174 212010891663 1K 212010891654 470R 3181 212010891663 1K 212010891654 470R NTSC Mono NTSC BTSC 39p 39p 4n7 33p 47p 47p 100p 100p 1K 1K 22uH 22uH 7225 B
30. AL9u pue e uo C 55 351 jns Buy ui speuueup dn 0 350 HNS eu YSIM upluw sjeuueup 10 15 9 351 HNS oun 03 51 y sueaui 5141 uequunu aui mojad Bulag Ins 5 jequunu 10 spuoo2es Ae 445 55 e PAPS e vv m SSINIHO TE 4 NOLIVTIVISNI 3975 3905 1 Aen gt v Aen 540 gt 4 Juns POPS E June 345114614 z2 eui dn 0125 Gm SVHINCO 82 MOD GSCNILEER Aen NOLIVTIVISNI nuaui IST HON UNS 351 gins bungan 5 4 225 o quo uo Aen ep 94 SseJd pue papayas 510 ueuM H Y sjeuueup ppinb Aen uc 55944 usum 8 40 151 e 372919 JANG suomunj 9142329195 7 5 LN 11 Abbreviations R Y OUT uC AQUA AV MUTE AVL AV2 AVL B TXT OSD BASS BCI 1 or BG OK BL TXT OSD BLACKST
31. Figure 3 1 Sale regulations reguire that during a repair the set should be connected to the mains via an isolating transformer safety components indicated by the symbol see fig 3 1 should be replaced by components identical to the original ones whenreplacing the CRT safety goggles must be worn Safety regulations require that after a repair the set must be returned in its original condition In particular attention should be paid to the following points strict precaution we advise you to resolder the solder joints through which the horizontal deflection current is flowing in particular all pins of the line output transformer LOT fly back capacitor s Sccorrection capacitor s line output transistor pins of the connector with wires to the deflection coil other components through which the deflection current flows Note This resoldering is advised to prevent bad connections due to metal fatigue in solder joints and is therefore only necessary for television sets older than 2 years The wire trees and EHT cable should be routed correctly and fixed with the mounted cable clamps insulation of the mains lead should be checked for external damage The mains lead strain relief should be checked for its function in order to avoid touching the CRT hot components or heat sinks The electrical DC resistance between the mains plug and the secondary side should b
32. Repeat if necessary 8 2 1 General The value can be increment or decrement by pressing the user remote control right or left key The results of the picture will change according to the selected item Focusing Set pattern generator e g PM5418 with colour bar pattern and connect to aerial input with RF signal amplitude of 1mv Set brightness and contrast at maximum Adjusted with focusing potentiometer upper hole of LOT 5445 for maximum sharpness of the picture IF PLL RF AGC adjustment software adjustment Set generator e g PM5418 with colour bar pattern and set frequency for PAL to 189 25MHz and for NTSC 55 25MHz with RF signal amplitudeof 3mv 70dBuv and connect this signal to the aerial input Enter SAM mode by Dealer Service Tool or short circuit service pins M28 and M29 on PCB and switch power ON The menu is displayed whenever SAM mode is entered Enter into TUNER menu select items IF PLL for AFT alignment Method Of Alignment Set AFW to 80 kHz A Adjust IF PLL until AFA A AFB just switching from 0 to 1 The correct value for IF PLL is 61 Enter into TUNER menu select items AGC for RF AGC alignment Method Of Alignment Connect a multimeter DC at pin 1 of tuner Adjust the AGC until the voltage at pin 1 of the tuner is 4Volts 0 4V DC The correct value for AGC should be 37 The value can be increment or decrement by pressing the user remote control right
33. TDA8374 Introduction In this chip most of the video audio and sync circuits are integrated and in the diagrams the IC is split up into 5 parts 5A 5B 5C 5D and 5E C7225 5A video detector see diagram A4 C7225 5B source select en PAL demodulator see diagram A6 1 7225 5 video control see diagram A4 C7225 5D horizontal and vertical sync see diagram 1 7225 5 mono sound demodulator see diagram A4 9 6 1 1 7225 5 IF video detector see diagram A4 Tuning system Forthe tuner 1000 there are two possibilities VST type or PLL type and in both cases the tuner is controlled by the uC The VST tuner is controlled via V TUNE AFC and the BS1 BS2 band switching signals the PLL tuner is fully I2C controlled 7225 5A contains the IF amplifier and the IF detector the IF signal is present at the output pin 11 of the tuner BS1 and BS2 pin 17 18 switching signals used for band switching of a VST tuner BS1 BS2 VHF1 0 1 VHF2 1 0 UHF 1 1 IF bands pass filter the IF bands pass characteristic is determined by the band pass of the SAW filter 1015 listed below you will find the possibilities For PAL BG sets a SAW filter with 5 5 MHz bandwidth is used 33 4 to 38 9 MHz For PAL 1 sets a SAW filter with a bandwidth of 6 0 MHz is used 32 9 to 38 9 MHz For PAL BG SECAM BG LL sets SAW filter with 6 5 MHz band switch is used to enable BG I LL recept
34. TDA8374C N3 A2 55 3V LEFT OUT RIGHT AV IN2 INS s rd for ITV purpose 21 IM34 VIDEO IN2 LEFT IN2 RIGHT IN2 HEADPHONE SPEAKER 1 YKB21 5099A g 0191 100u 1208 A9 1 INTERNAL LOUDSPEAKER 16 OHM 3W 8 5 5 4 2 INTERNAL 3 LOUDSPEAKER T 8 9 L_EXT1 1 DK A54 CL 86532018 017 010498 M9 D1 M11 1 M16 G11 0191 G10 1102 G3 1104 G3 1110 G9 1111 H9 1112 B7 1113 C7 1114 C7 1115 B10 1116 C10 1117 C10 1119 E10 1120 E10 2104 C5 2105 D5 2108 H4 2113 2114 04 2115 H8 2116 G8 2117 G1 2124 E9 2125 E9 2128 G5 2130 H5 2131 G3 2132 G4 2141 G6 2161 A4 2163 E9 2164 E9 2165 C9 2166 C9 2167 C9 2168 C9 2169 C6 2170 C6 2198 G9 2199 H9 3105 G2 3106 H2 3107 G2 3108 H2 3114 E9 3115 E9 3116 C9 3117 C9 3118 C9 3119 C9 3120 C7 3131 C7 3141G7 3142 H11 3143G11 3144 G4 3166 B5 3167 B4 3168 A4 3169 B4 3171 C5 3172 C5 3173 B4 3174 C4 3175 C4 3176 C4 3177 C4 3178 D5 3179 D5 3180 C4 3181 D4 3182 D4 3183 D4 3184 D4 3185 E9 3186 D9 3187 D9 3188 09 3189 B9 3190 B9 3192 H9 3193 G9 4100 F8 4107
35. c c t c t COD 0D c c c c t t t c t t C t t C t t tC t C c c c c c OD c NM UXXOT TNO CNO000 9 NF OO CNITOUO E Ee gl NOOO t NNNMNN OO ENEE P P PT P 000000 P TO SE ESE STE UO GO COT NS 000900 0009090000009 SE EANNAN OOOOOOOOQOOQOQ NINNNNINNNNNNNNANANNNNANNANAANANNAD PONO SO SOROR ORO NOR NONO TINTS IN INN INN SE SE SE SE SE SE SENSE SE SELOUOUOUOLOLOLOUO lt en lt Ca LI E Xi ci Een SOTEN RB vd NI 5 ID E X NI e 32205212 3221 5 po IN 5 led ou Joy oi o lo oi N INI ID o X hol N IS NI Y N S 3273 15 56 15559 H 252 d HE ore e 5
36. gt Spectral adjustment NOTE ALL VALUES ARE RECOMMENDED NOMINAL VALUES 8 3 2 2 5 Sound adjustment software adjustment Set generator e g PM5418 BLACK without video pattern set audio to stereo mode carrier ON set RF frequency PAL 189 25MHz NTSC 55 25MHz with signal amplitude 1mv and connect to aerial input Enter the SAM mode by using the Dealer Service Tool or short circuit service pins M28 and M29 on PCB and switch power ON The menu is displayed whenever SAM mode is entered Enter into AUDIO menu and select item according to factory setting Check the sound quality by the above generator setting The factory settings for 2CS NICAM are AUDIO A FM 80 AT 8 STEREO 143 DUAL 113 NOTE ALL VALUES ARE RECOMMENDED NOMINAL VALUES 9 1 9 1 1 9 1 2 Circuit description new circuits Power supply diagram A1 Introduction General The switched mode power supply SMPS is mains isolated The control 7520 MC44603AP gives pulses for driving FET 7518 with duty cycle control at fixed frequency of nominal 40 kHz in normal operation In stand by slow start and overload situation the SMPS runs at other frequencies than these 40 kHz 9 2 9 2 1 Basic characteristics of SMPS Mains Isolated flyback Converter type Input range 90 276 Volts AC multi voltage or 150 276 Volts AC single voltage Secondary Sensing by Opto Coupler 107520 is Featured w
37. shorter T on So the duty cycle decrease and so the secondary output voltages will be decreased corrected This will give a new 9 3 8 9 3 9 9 3 10 9 3 11 9 3 12 balance off feedback voltage Vpin 14 and the internal 2V5 reference voltage at a new smaller duty cycle As a result of the shorter T on the maximum decreases so less energy can be stored in the transformer In this way less energy will be supplied to the load In case the demagnetization ofthe transformer is not yet finished the positive edge from the oscillator which will start a new cycle will be overruled via buffer block D as being the starting point of T on will be delayed and frequency of the SMPS will go down This procedure is used during start up Peak current limiting Peak current limiting is realized by an internal clamp at pin 7 This can never exeeds 1V DC and so the maximum value of I prim maximum current through FET 7518 is determined In case load needs more than the maximum power by then the I prim is already at his maximum level so the SMPS will go in overload protection see also foldback principle explained at overload protection Cycle by cycle control The T on control is regulated on a cycle by cycle basis see block IC7520 This means that in every cycle the T on is determined again By doing so the secondary voltages control peak current limitation and all protections is very accurate and fast Slow start
38. 12 MHz 50mvV div AC 200mV div DC 2V div DC 500mvV div DC 20V div DC 0 2ms div 10us div Bus div 10us div 10us A9 F1 L6 P5 13V DC 4 V16b 555455 11 5V DC HH H 50mvV div AC 0 5 div DC 5V div DC 500mV div DC 20V div DC 0 1ms div 5ms div 5ms div 10us div 10us div A18 1q 1 2V DC F2 L8 5 0V DC Pe V11 V16c A18 DC Pa L9 11 7V DC 110 194V DC 1V div DC 200mV div 20V div DC 5us div 10us div 10us div P1 270V DC Pe 12 P1 270V DC n hi 50mV div AC 10V div DC 1V div DC 200mV div AC 0 2ms div 5ms div 10s div 10s div A20 14 8V DC F4 Ni 41VDC P9 2VDC V13 2 42V DC SS N 0 2ms P100 120V DC i EH 100 120V DC 10V div DC 500mV div AC 5ms div 10s div A21 1 P2 P110 14V DC v14 11 14V DC kb 13 10V8 DC 50mvV div AC 500mv div AC 5V div DC P130 10V2 DC 500 0 1ms 10us div 5ms div 10us div 1020498 B LINE DRIVE SYNC FRAME amp VERT DRIVE 4 pe 8V VIDEO PROCESSING 48V 2201 8 48V 2203 48VA CRT DISCHARGING 4 D NTROL col VV 5VD 5V g
39. 19550 ang uj wonog IS amyd amnpld KS 5 tree amp Repair facilities 5 1 5 2 5 3 Repair facilities Functional blocks The PCB has service printing on both sides so on the copper and the component side Functional blocks are indicated by lines and text Test points are referring to the functional blocks as mentioned above Test pointElectrical function P1 P2 etc Power supply L4 12 etc Line drive and line output F2 Frame drive and frame output 51 52 etc Synchronization 1 etc Video 1 A2 etc Audio C1 C2 etc Control B1 B2 etc BTSC stereo decoding etc NICAM stereo decoding The numbering is done in for a diagnostics logical sequence Example Checking the power supply start with test point P1 P2 etc Service mode The service mode is a pre defined mode which can be used for faultfinding and adjustments especially when the TV gives no picture at all you can use the service default mode All oscillograms and DC voltages in this service manual are measured in the service default mode The service mode is split into two parts Service Default Mode SDM Service Alignment Mode SAM SDM In the service default mode you are able to carry out hardware measurements under pre defined conditions To entry the SDM Service Default Mode there are two possibilities
40. 2 eva 3004 H2 7217 F11 3212 3005 H2 7220 E5 5 aen 7225 F8 Am DC e 1K 3007 7225 C C5 8 118 o 3008 H2 7225 E B3 3 1 3009 G2 7255 A8 4 5 0V DC 28 1209 3010 7260 08 TPS 3213 3011 4 7277 C2 3016 H4 7278 D2 15 0 5 DC FOR PAL MULTI ONLY 1K 3020 2 7279 D2 7225 3022 2 9003 2 TDA8374C N3 for ITV purpose 3040 F5 9004 G2 IM31 BTXT 3041 G6 9005 G2 17 3042 H5 9006 F2 wm COD 3043 H6 9007 G6 DER 3050 G6 9008 H4 3051 H6 9202 F9 3201 H9 9203 A5 BC847B 7214 1 3202 9 IM31 G11 m PIXOS 3203 H7 1M39 H12 5 3204 H7 3205 H7 320 Fi 50mV AC 3207 B5 500ms div CVBS SOUND 3208 A4 6 36 3209 A4 3201 2203 3210 E for ITV 3211 E11 390R 100n Sr purpose 3212 F11 For bandpass filter 3202 IM39 3213 F11 711 S 3214 G9 3215 G10 2 3216 H11 3217 F10 CL 86532018 015 2215 22 010498 3221 D4 8 9 va 10 vit 1 vi 12 ag V14 v15 II II H In W Li 500 div DC 1V div DC 500mv div DC 500mv div DC 200 div AC 200 div 500 div 500 div 500 div 10us div 10us div 10us div 10us div 10us div 10us div 10us div 10us div 10us div CL 86532018 005 AI 270398 7 Diagrams and print lay outs 1 2 3 4 E CONTROL Ref Des VST Tuning PLL Tuning BZX79 C33 3614 3615 3618 jumper jumper jumper 1
41. 4822 4822 4822 4822 4822 4822 4822 4822 4822 4822 4822 4822 4822 4822 4822 4822 4822 57 11518 57 70439 52 20547 57 11519 57 11515 57 11516 57 11526 57 11517 57 11518 57 11524 57 11326 57 11514 57 11527 57 11528 46 10961 46 10963 46 10966 57 11521 57 71266 57 11522 57 11546 42 40351 57 71405 40 10509 58 10728 220nF 20 25V 390k 5 0 1W 390k 5 0 1W 202 5 0 33W 5 0 1W 8k2 1 0 1W 4M7 5 0 1W 200 5 0 1W 200 5 0 1W 303 5 303 5 303 5 k8 1 0 6W 2k2 1 0 6W k8 1 0 6W 2k2 1 0 6W Q5 5 0 33W 407 5 0 33W 680k 5 0 1W 470 5 2W 407 5 SW 33k 5 2W 6k8 5 SW 10Q 5 0 33W 27k 1 0 6W 43k 1 0 6W 82k 1 0 6W 43k 1 0 6W 56k 1 0 6W 407 5 0 33W 10 5 0 5W 10 5 0 5W 407 5 0 33W 303 5 0 33W 10 5 0 5W 10 5 0 5W 4700 20 0 5W 2 2 5 0 5W 90 200V 5 1008 SURGE PROTECT DSP 510N A21F A 202 33k 5 3W 33k 5 3W RESISTOR 7 WATT MOX 180k 820k 1 0 6W 407 20 3W1 R22 5 3W 330 5 0 33W 4M7 5 0 5W 3k3 5 0 1W 1200 5 0 1W 1k5 1 0 1W 150k 196 0 6W 160k 196 0 6W 4700 30 LIN 0 1W 8k2X6 2k2 X6 8k2 X 12 68k 5 0 1W 5 6uH 5 2 3X3 4 FOR MK2 AND ANUB S IND LALO4 0U68 PM20A 1 20H 5 2 3X3 4 12uH 5 2 3X3 4 15uH 5 2 3X3 4 22uH 5 2 3X3 4 10uH 5 2 3X3 4 5 6uH 5 2 3X3 4 8 2uH 5 2 3X3 4 IF COIL 77 8mH z 76 2 IFT COIL 91 5mH z IFT COIL 77 8mH z FLYBACK TRANSFORMER FLYBACK TRANSFORMER FLYBACK TRANSFORMER P
42. 4822 126 13061 uF 220nF 20 25V 2221 4822126 13061 uF 220nF 20 25V 2225 532212232286 UF 3 3pF 5 50V 2226 5322 122 32286 UF 3 3pF 5 50V 2239A 4822 122 33172 uF 390pF 5 50V 2240A 4822 122 33172 uF 390pF 5 50V 3243 4822 117 11437 8k21 0 1W 3244 5322 117 12487 1k RC12G 1 0 125W 3247A 4822 052 10109 100 5 0 33W 5206 4822 157 11515 12uH 5 2 3X3 4 HE 7202 4822 209 15832 MSP3410D PP B4 7202 4822 209 16307 MSP3400C C8 7209 4822 130 60511 BC847B 72144 4822 130 40981 BC337 25 7215 4822 130 60511 847 7216 4822 130 60511 BC847B
43. 9 3 9 3 1 The switching periods of TS7518 The duty cycle of the power supply depends on T on of FET TS7518 and this is controlled by pin 3 of IC7520 This IC detects the variations of the VBATT via sensing winding 8 9 at the primary side of T5545 The switching period of TS7518 can be divided into three main phases Duty cycle T on T off and T dead During T on FET 7518 will switch on and conducts so the energy that is extracted from the mains is stored into the primary winding 2 5 of transformer T5545 with a linear increasing primary current The slope depends on the voltage across C2508 Via T on regulation by pin 3 of 7520 the duty cycle of the SMPS so the VBATT is controlled During T on FET 7518 will switch off and does not conduct So all energy inside the transformer is supplied to the load via secondary windings of T5545 and the secondary 9 3 2 EN diodes D6550 D6560 and D6570 D6590 The current through the secondary side of the transformer decreases with a linear slope of T5545 During T dead FET 7518 does not conduct and no energy is extracted from the mains of supplied side this gives space for T on and T off regulation Primary side Mains input and degaussing Mains voltage this voltage is filtered by L5500 and 5502 rectified by a diode bridge rectifier 6505 and smoothed by C2508 to the DC input voltage for the SMPS at pin 5 of T5545 e g 300V DC for 220V AC mains M
44. BYD33D 2490 B7 2491 D7 3475 m 4R7 3448 E7 3477 m 100R 3449 E8 3478 3308 3451 B6 3453 B5 i 3454 05 3488 487 4R7 3458 C5 5445 312813820571 312813820601 312813820581 HEATER 3461 F1 5451 33uH 27uH 27uH 3462 E2 3463 F3 3465 D8 6463 3466 D9 3467 09 1N4148 3470 G3 3471 G3 3472 G3 3473 G3 3474 H4 6470 2 79 E BZX79 C9V1 2491 3475 H4 d 3476 H4 470p 3477 G5 41V LOT 6487 BYD33D BYD33D 6490 MES 3478 G7 7470 MTP3055 MTP3055 ki 3479 G3 9453 YES YES BYV27 400 3480 B8 9460 YES 2448 Ret 3483 G6 3484 G6 3485 F8 3486 B8 3487 B8 3488 F8 3489 C8 3490 C8 3491 D8 3492 E8 3493 C9 29 ONLY 411V LOT 2 2196 08 ONLY FOR SETS WITH E W CORRECTION 49487 3497 09 5445 B6 4 980 4 esum 1 5487 AV 2487 5451 B6 22 1 5457 C6 220u E 5460 F2 5461 F2 EHT INFO TO 5463 5465 E6 CRT PANEL 5470 F4 C60 5471 G4 ITEM 2464 2 2 2468 2472 3474 487 3481 43K 5457 822800129531 312813851703 312813851703 5463 312813834021 5465 312813834011 gt 5470 311233830531 5471 mH gt BYD33J BYD33J 5480 39uH 47uH 6461 BYW95C 20 BYW95C 20
45. H8 4130 H5 4171 C5 4178 D5 4332 C2 4333 D2 4334 D2 5101 H4 6100 H2 6101 G2 6110 B5 6111 B9 6112 B9 6113 D9 6114 D9 7101 G2 7113 C4 7114 D4 7115 A4 7117 C4 7118 D5 7225 B G4 9100 G2 9101 H2 9102 H2 IM34 08 IM35 B3 IM36 A3 M27 A C8 M27 B B8 M27 C C10 M27 D B10 M27 E E10 M27 F D10 M27 G C8 M27 H D10 27 E10 0 5V div AC 0 1ms div A5 0 5V div AC 0 2ms div A6 div DC 10ms div 50mvV div 0 2ms div 50 div 0 2ms div A9 50mvV div 0 1ms div CL 86532018 007 020498 Diagrams and print lay outs e 7313 HEF4052BP 6 48 2338 3331 To Subwoofer 94 only d 100u 6 47 MONO OUT 6 44 7 44 MONO SET headphone channel volume INPUT SELECTOR MAD SDA SCL BUS CONTROL STEREO
46. I P 00000009 ee AINANANANANAANANAAANAAAAANANSSSS DSTI TINIE rro rro rro rrr yr yr rro ADON LOGOCOCOCOGOCO COO EE CYR C000 OOM Ett SEE ENEE ENEE OO Mu COLOCOUXXOCO DUO CO OUO T LOCOGO COO CO D OXO CO OT OMS D P LOOMOAWAWAMADACVSOALMWANADOCOCAAAAWTLOLADANHLVABCAACAMDMOAWACCACAWOAWWWIWWWOSCOWWWWWTOATOWWIWOWOOWIWWIACOMOMAGHGAAMMSCMMMNCCO lt M lt C c son c 00 C0 lt lt OX CO FIOI 000 OQ 0 01 000 OCIO Fu 001 FUCO AN WONMTNOD DONMTPOOMOONN FU 00 AMEN 00 TAM 00 NICO re eg
47. ONOOOHOMNOOOOHOOOMNNNNNONONONOOOCOOOMMMMP IMT TF O c c c c x x m aogmpaamaeomoooomgooaoamoaamaaemameemmoeamemaomeaeenmaemaamaaeqammmooOpOOnQ cncn aon nmm c On c c c c c c OO t c CD c c t t t t t d t t t FAMN OMN NMQONO MOO FOAM TNO FUDUOT ONO TF NOM 000 YO O00 FUGO OO CNITO TRS HAM LOCO T DDO SHAMIM 000 000 FLAS OM FONON SF OY CO CNIPOUOXGO 00 ANNO LO PPS ANANMNINGODGOOR 090000020000000 t OQ SEO PTT PSPRSPSPSO00000000 OO OQ CNONCNCNICNONESE DO HAIN NAMI s ESSE SE SEUDUDUDUDUDUDUDCGOQOUQGOCOCGCOGCOGCO LOUOULOLOLXOCOCOCOLOCO CO LOO CO CO CO CO CO COCOCO CO LOLOCO CO CO CO CO OO OQ OQ AINA AANA NC ION NI NCC NI NIC NI IC NIC NC ION NIC NIC I NIC NIC NC NI NC TP EE NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNAMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM Ee e eelerer eer SEND SESE SE DOOM COGO OOOOMMMMMMI c c x lt lt mammcogammmmemememenmococodndoeammemammmmema momen ene c eene enam en men e c c t t
48. TDA4665 V4 BC857B BSF19 F2 BSF19 F2 TDA9860 V2 TDA7057AQ N2 AN7318S BC847B TDA9850 V1 BC337 25 TDA9302H STV9379FA BC857B BU1508DX BF819 MTPS055EFI BC337 25 BC557B BC857B STH8NA60FI ES 12 Spareparts list 7520 4822209 15684 MC44603AP 7541 4822 209 15829 TDA8139 7542 5322 130 60508 BC857B 7570 4822 209 81397 TL431CLPST 75814 4822 209 71634 TCDT1101G 7600 4822 209 15831 P87C766BDR 01 7600 4822 209 16308 P87C770AAR 40 7600 4822 209 16312 SAA5297PS 051 7600 4822 209 16459 P83C366BDR 016 7603 4822 130 60511 BC847B 7608 4822 130 60511 BC847B 7610A 4822 209 73852 2369 7620 4822 209 15822 ST24W04B6 7650 4822 130 60511 BC847B 7651 4822 130 60511 BC847B 7681 4822 130 60511 BC847B 7682 4822 130 60511 BC847B 4r 2830 4822 121 51473 uF 470nF 20 63V 2840 4822 124 11565 uF 10uF 20 250V 2841 4822 126 13599 uF 3 3nF 10 500V 2843A 4822 126 12278 uF 3300pF 10 2KV 2845 4822 12231175 uF 1nF 10 500V LE 3832 4822117 12516 6800 2 0 5W 3834 4822 117 12516 6800 2 0 5W 3836 4822 117 12516 6800 2 0 5W 3840A 4822 052 10109 100 5 0 33W 38414 4822 052 10108 10 5 0 33W 3842A 4822 052 10108 10 5 0 33W 3843 4822 117 11896 1k5 20 0 5W 3845 4822 117 13016 1M A 50V 115V Audio panel HE 7830 4822 209 16321 TDA6107Q N1 1204 4822242 10769 18 432 000 MHz 4r 2214 4822 126 13486 uF 15 2 63V 2216 4822 126 13061 uF 220nF 20 25V 2217 4822 126 13061 uF 220nF 20 25V 2220
49. by the spike V cs out Asa result the pulse at pin 3 becomes high gt T on starts and by the positive edge of Vosc from the internal oscillator and low gt T on stops by the spike of Vcs out The T on start will be delayed in case the transformer is not yet demagnetized see the slow start procedures Stable load and increasing decreasing load In case of a stable load the feedback voltage at pin 14 and so also the maximum current sense voltage at pin 7 remains the same as a result the T on and the duty cycle will remain the same In case of an increasing load the secondary output voltage will decrease The voltage on pin 14 would also like to decrease which causes a V error out to increase As a result comparator B will give the pulse later pin 3 will be high for a longer period longer T on so the duty cycle increase and so the secondary output voltages will be increased corrected This will give a new balance of feedback voltage at pin 14 and the internal 2V5 reference voltage at a new and larger duty cycle As a result of the longer T on the maximum increases so more energy will be stored in the transformer In this way more energy will be supplied to the load In case of a decreasing load the secondary output voltage increases The voltage on pin 14 would like to increase which causes V error out to decrease As a result comparator B will give the pulse earlier Vpin 3 will be high for a shorter period
50. d 10 A24 A11 See 25 713 7 22 P3 P15 13 23 9326 3427 5520 ST V9 7255 16 P10 V10 14 V12 ER L4 3473 925721 3476 L3 7225 L5 2460 28 2465 iar 2485 EN AW 2484 i L8 Car Ae 2486 LOT e 6402 2489 14 6 L9 F4 E 2008 F2 2104 2105 9405 6110 5 4 CL 86532018 001 A 010498
51. keys 1 Scroll down with the lt gt key to highlight SKIP 2 Select with the lt or gt key CHANNEL is highlighted 3 Enter a channel number 4 Scroll down with the lt key to highlight SKIP CHANNEL 5 Select YES with the lt gt key B ME D CHANNEL DELETED appears to confirm that the channel is skipped To unskip channels repeat step 3 to 5 but select NO instead of YES 050 6 Exit with the key 14 aen 10 uondang OL installing the tv SYSTEM PAL DK SEARCH VHF Ip FINETUNE bm System selection For multi system sets This feature enables you to select either PAL BG PAL DK SECAM DK NTSC M or AUTO If AUTO is selected it means that the system is automatically selected according to the current transmission For dual system sets This feature enables you to select either PAL DK or PAL I For single system sets This feature is not selectable 1 Scroll down with the lt key to highlight MANUAL SYSTEM is highlighted 2 Press the lt or gt key to select suitable system 060 3 Exit with the key Sound settings Personal settings You can do adjustment on VOLUME BALANCE TREBLE and BASS of a picture via the 1st level menu Adjustment on treble and bass will auto matically be stored in the PERSONAL mode of the SMART SOUND feature How to do adjustment 1 Call up 1st level menu with the key 2 Scroll up or down with t
52. lay outs TAINN ODI 0000 LO LOCO 00r COP ANNA SE MMLONONONNOL lt n cn enm en c c c mac XO o0 XO n O x m c EE PO SPUXOP 0 OUO IO rU Y SELOT OF FNON CON WAN CO OON ONONNOMOOO NN CNCNCNCNCNONCNICNION QNI SE SE SELOLOGOGOGOUO OUO lt lt AOSESESESESESESESESEUDUDUOUOCOUOUO TP PPP PPP E PP PSP ISP PPS EE SESE SE SESE SELOLOCODON COT P P P P D PUN EE PONO a a a a a a a PIN SAINI CORO P I 000000 00 OOM AWD OO WO LOL ERO ET SEND SE HAIN x x x x oooo0ommemamamammmammmmoOOOoOOOO0O0O0O0XO0O0O000o00mmoOdomcoammmenmoomoegeonmmenomeaammemeumemtnuOOCOCOCO n c cm comcemomenmmeneam Or Om OO c CO OD CO x x x OOco0O00t0mmoomocdam DOMINION 000001 LO 000 CI POLOCGOT HE OONO SHAW DON FUGO AMIR FO NN ORNAM NORN AM 000 O00 DO MS OO OOM 00007 00000000 DON DO P P P RONSON
53. mmm SSINIHO TUE 4 NOLLVTIVLSNI HON 3405 SaJnjeaj 429307 Aen 3X3 TT s ouueup sse e 0 31 pue eui OT Sjeadde 43000 4 epo y61p p 33002 Aen S 2 dn 025 6 4955 03 pee oud 00 03 USIM u iuM 19410 10 0 Sdaysjeaday 78 420 SAA 09185 03 10 gt 55944 1907 346146 4 2s umop 10 05 9 220 e JO 1201 03 119 209195 01 10 gt 55944 lt nuauu 5143 uo ajqe aq JOU apo2 y ui JOU op A 8888 p Nua 03 Ae lt 10 gt 55 E GTIHD Ae 2 10 25 72 AD nusu IST Spouuetp OL NOUVTIVISNI 3905 gt 15 NV 5 0 8 Yndo vy wmm SSINIHO ME lt NOLIVTIVISNI HON 3405 SaJnjeaJ 10 Direction for use c
54. 0 1601 1602 3655 3654 8 2 XTAIN OSCGND 4 28 qus LOT 3602 F VDDT NAMA 7 2K2 VDDA VSYNG 7603 5VD avo 581 0 3602 E 6 7651 3602 D 5 2K2 BC847B 3602 C 4 2K2 3602 B BZX79 C8V2 STAND BY LED 3 22 3602 A 17 SERVICE SAM M28 M29 CVBS TXT 1N4148 4 13 BS1 1 7681 10K 3682 BC847B 2685 3683 100 M 2n2 10K 5 n ov 3685 HSYNC P3 4 PWM7 7682 68K BC847B 8 BL TXT OSD A 4 22 R TXT OSD 4 23 TXT OSD COR VSSD2 FRAME 7600 52 PIN WITH TELETEXT 7601 48 PIN WITHOUT TELETEXT BS2 BLACK STR SW Ref Des 8844 TDA 837X 3665 GND 3664 for purpose 4 24 1N4148 3697 B 050 4 25 5603 for ITV purpose 820R 8 2 IM30 Ref Des Non TXT CC 3694 3695 3696 3697 3698 5K6 5K6 5K6 CL 86532018 016 010498 GND H2 M24 A10 M25 A10
55. 0 006 eps 110398 6 Block diagram
56. 0s div 10s div A20 14 8V DC F4 1 4 1V DC 2VDC V13 42V DC aman anan ani f 0 2ms AC P100 120V DC H 100 120V DC 10V div DC 500mV div AC 5ms div 10s div A21 1 P2 P110 14V DC V14 P11 14V DC fa H 13 10V8 DC 50mV div 500mv div AC 5V div DC P130 10V2 DC 500 div ETGEN 0 1ms div 10us div 5ms div 10us div 020498 7 Diagrams and print lay outs XOCO0QQ0COCOCOLOLOUOLOLOT DOIN DONO CN EE sS SENG SENSO CIC ICI CONI ELO m QNI s SESE SF DOLNCOWMIM ON tmnmootmocoomoemoodomopm qma ogma emaeoooocgoooO0nmmogoodoOdooOdoooooonondooaododaoaoooaoooooooodnooaoomoomognodooodnoouoomul AMn TO AMNON CO CO CNIPOIOGO T OO FUCO CO AMINO 000 CN 00 C9 OY 0 FUCO T 000 c MMMMON t SF COMPO LOLI 00 ION IOS D P DOT P P D P OO D S P P P P I P DOT P P I 0000 00 0090009 OONN SF LOLA St SESE SISOS EECHER QOOBOGOGOXOOOQ I Gu I E c O EO SERO OC MIO CL LG OL d S IS XO LOL I I XO WIA SE SO COO OU IO Lc CE Ld b Cn an Cac CCS C COO CO OC CO OE OLG KO OCIO OO ORO OU M dU OCC OOOO AMODO FOOGOMN MO AMNNA MN O00 000 ONITO sLOXOCNCO NT NORD IPOs UOCOT DOT AMI FE 00020 AIMS NOM
57. 1 voltage will drop lt 6 5V As a result the VFL will feedback this to pin 37 of 7600 micro processor and this will switch the supply to stand by mode Sound detector IC7225 5E diagram A4 Single FM mono sound for demodulation will take place in 1C7225 5E No adjustment are required because of automatic PLL tuning from 4 2 to 6 8 MHz Information of NVRam tuners video and audio 5 The following components are also applied in this chassis C7620in circuit diagram 5 NVRAM ST24W04B1 Non Volatile Memory The ST24W04B1 is a 4k bit EEPROM device The enable pins E1 and E2 selects between maximal four different ST24W04B ICs Last status of a set is stored in the EEPROM and can be retrieved whenever there is a power interruption Tuner 1000 in circuit diagram A4 UV1355 UV1336 is applied The list of tuners is as follows For 25 and 29 AP tuner type UV1335 is used Type of tuning is VST For 25 and 29 Latam tuner type UV1336 is used Type of tuning is PLL Audio IC s 107310 TDA9860 Audio processor 107315 TDA9850 BTSC decoder with SAP 107312 AN 7312 AVC automatic Volume Correction 107202 MSP3410D Nicam stereo decoder 107202 MSP3400C 2CS Korea and 2CS German decoder 107313 HEF4052 switch function IC 107311 TDA7057A 2X3W stereo sound amplifier For European and A P sets we can have 2CS mono stereo dual sound this is decoded by IC
58. 14 8V DC A21 50mV div AC 0 1ms div CL 86532018 008 AI 270398 7 Diagrams and print lay outs 1 2 3 4 5 6 7 8 9 10 11 12 2360 5 BTSC DECODING 2363 C7 2364 C7 2365 E5 2366 E5 2367 E5 2368 E5 2369 E6 2370 E6 2371 E6 2372 E6 2373 E6 2374 E4 2374 C5 2375 D4 2376 E7 2377 E7 2378 E7 2379 E7 2380 D8 2381 D4 2387 E8 2395 EQ 2396 E9 3349 D4 3350 C5 3351 E6 3352 E6 3353 09 3354 09 3355 C9 3356 D9 3357 E8 B2 3358 D8 EN 3359 F9 gt DEMATRIX WA STEREO DECODER T 4313 D8 MODE SELECT 4317 TDA9850 pS INPUT 2K2 5301 E7 WE NOISE STEREO SAP 6303 Aner DETECTOR SWITCH DE EMPHASIS 6304 G8 7315 D6 Y LOGIC 7316 C3 Ge 7317 EB DEMODULATOR supper vis 7317 BC337 25 7 9v7 11V LOT 1N4148 BZX79 C9V1 K CL 86532018 019 010498 7 Diagrams and print lay outs ___
59. 1603 4822 276 13775 1670 4822 218 11573 1681 4822 242 10694 4r 2002 4822 124 80791 2050 4822 126 13486 2128 5322 126 10465 2198 4822 122 33805 2199 4822 122 33805 2209 4822 126 13473 2215 4822 126 13061 2224 4822 124 11576 2275 4822 126 13486 2277 4822 126 13486 2278 4822 126 13486 2283A 4822 126 12944 22841 4822 126 12944 2285A 4822 126 12944 2315 4822 126 13482 2316 4822 126 13482 23234 4822 121 43823 2324A 4822 121 43823 2325A 4822 121 43823 2326A 4822 121 43823 2327 4822 126 13482 2328 4822 126 13482 2337 4822 122 32646 2339 4822 126 14043 2342 4822 124 80061 2346 4822 126 14043 2347 4822 126 14043 2348 4822 126 14043 SPRING K12 SWITCH MAINS FUSE HOLDER CLICK PROM B2P3 VH B2P3 VH LED HOLDER FIX IC PCB RELIEF BRACKET HEADPHONE SOCKET F PHONE 3 5MM STEREO SPRING K12 SPRING K12 9P UV1355 l 13555 UV1336B AIS UV1336B AFS UV1336B A F FRAME 29 OFWK2960M 45 750 000 MHz B39380 K2953 M100 B39389 G1984 M100 SFSF6 5MHz B TF21 SFSH5 5MHz B 21 SFSH6 0MHz B TF21 SFSH4 5MHz B TF21 TPS6 0MB TF21 TPWA04B TPS4 5MB TF21 TPS6 5MB TF21 TPS4 5MB TF21 HC49 U 3M575611 4 433619MHz HC49 U 4 433 619 MHz 3 579545MHz HC49 U 3 579 545 MHz HC49 U 3M582056 CSB503F58 218005 5A 19372 1A SWITCH SWITCH SWITCH SWITCH GP1U28QP 12 000 000 MHz 70 16V 20 85C DXH 8X11 5 15pF 2 63V 3 9nF 10 50V 330pF 10 63V 330pF 10 63V 220nF 80 20 50V
60. 20 via and secondary output voltages sensing In case the load decreases below a certain threshold the SMPS will switch in reduced frequency mode of about 20 kHz this threshold is determined by the voltage level at pin 12 of IC 7520 REMARK In case of an unload situation the set will switch to low frequency mode or standby mode Whether this unload situation of the SMPS is caused by the standby command or by a failure e g in the line circuitry this can be determined by switching on the set again which the remote control In case of standby mode the TV will switch on again in case of unload situation the set will NOT switch on Overload short circuit protection If the secondary load becomes too high also becomes too high this is sensed by the current sense voltage at pin 7 This voltage at pin 7 is not allowed to exceed 1 Volts DC and it has current limiting As the is limited the secondary output voltages will drop and supply voltage at pin 1 will also drop As soon as pin 1 9Volts DC the driving pulses at pin 3 will stop As a result of these two mechanisms in case of an overload the secondary voltages will drop very fast this is called the foldback mechanism The foldback point can be adjusted by pin 5 of 1C7520 and this point is adjusted to a maximum tolerable output power of 85W at 90 Volts AC and 165W at 276Volts AC After this foldback the IC starts up again see slow start in cas
61. 22 124 41984 4822 126 13185 4822 126 12638 4822 122 31175 4822 121 43526 4822 126 12239 4822 126 14053 4822 126 14184 4822 121 10739 4822 4822 4822 4822 5322 5322 4822 4822 4822 5322 4822 4822 4822 5322 4822 4822 21 70637 21 70649 21 40483 21 40488 21 42532 21 44151 21 51319 22 31177 21 51252 24 41379 26 14096 21 40518 21 43823 21 42386 24 11534 24 80791 4822 4822 24 11769 24 80791 4822 4822 4822 4822 4822 4822 4822 4822 4822 4822 4822 4822 4822 4822 5322 4822 4822 4822 4822 4822 4822 4822 4822 4822 4822 4822 4822 4822 4822 4822 4822 4822 4822 24 80062 22 31177 22 31177 26 13589 21 70141 26 12793 26 12793 26 12793 26 11524 21 10486 24 41748 24 42168 26 11524 26 13337 22 32331 22 50116 22 33805 24 11571 21 10738 24 80059 24 81089 26 14049 26 14149 24 42336 26 13061 26 14149 24 81145 24 41097 24 80499 24 80707 26 14087 26 13061 26 13473 4822 126 13473 4822 126 13482 5322 5322 4822 26 10184 26 10184 26 13061 220nF 80 20 50V 470nF 80 2096 16V 22uF 50V 220nF 80 20 50V uF 1 20 16V 470nF 80 2096 16V 470nF 80 2096 16V 47nF 1096 uF 1uF 20 16V uF 1uF 20 16V 470nF 80 2096 16V 5 6nF 1096 50V uF 100nF 5 63V uF 100nF 5 63V HE 100uF 20 63V 3 3nF 20 1KV 220nF 5 63V 220nF 596 uF 1nF 10 100V uF 100nF 5 63V 220pF 10 500V
62. 3252 C7 1279 D3 3253 B7 NOT USED 8 7255 2002 F2 3254 B7 5 TDA4665 2005 F2 3255 F5 NORUSED 5 2008 F2 3256 F5 3 2009 H4 3257 F5 OTHER VERSIONS SIGNAL 2011 G2 3260 F8 CLAMPING 2013 F2 3261 E8 NOT USED LINE SAMPLE 2016 H4 3262 F8 MEMORY 4 amp HOLD 2040 F5 3263 E7 2041 G5 3264 E8 2042 G5 3265 E8 SIGNAL 2043 H5 3273 C4 CLAMPING 2044 G6 3277 C2 LINE SAMPLE 2050 G6 3278 D2 MEMORY amp HOLD 2051 H7 3279 D2 2200 B2 3280 E7 _ SANDCASTLE FREQ PHASE DIVIDER 2201 H7 4001 F4 5 DETECTOR DETECTOR 192 2202 H8 4002 G4 2203 H9 4003 F2 E DIVIDER 2205 C7 4004 G4 S BY2 2206 B2 4200 C4 2207 5 4201 C4 2209 B4 4202 D5 2211 4203 D5 2212 C3 4204 C2 2213 B2 4205 011 CRT DISCHARG 2214 B2 5003 E2 D aM 2215 F9 5040 G6 2216 E11 5051 H6 2217 G10 5054 G6 VIDEO CONTROL ERT INFO 2221 05 5201 G10 A 2222 D5 5202 F9 3225 2224 F9 5203 E9 CVBS OUT 2226 E5 5205 E11 3227 T 4 32 2228 E5 5206 011 478 3229 X A632 2248 A7 5252 C7 TO 2249 B7 5260 E8 47R E 2251 C7 6015 G4 Vis Ei 2252 C7 6016 G4 BC INFO 2254 6040 G5 1 2260 F8 6254 C7 css 2261 E7 6260 E8 3v2 2272 C4 6261 EE 2273 C4 6263 D8 1v2 2275 C3 6264 D8 2277 C3 6265 D8 5 2278 D3 7001 H3 6260 3264 INFO ES Kr 2279 D3 7002 H2 4 29 2283 6 7003 G3 1N4148 220K pega 1004 H3 500 6261 3261 2285 E6 7204 A4 10us div P 3000 7214 G10 1N4148 47 3001 G2 7215 H11 5260 3002 H2 7216 10 1 6V DC NTT 3
63. 443 34514 3453 3454 3462 34654 3480 3481A 3481 3482A 3482 3485A 3486A 3487A 3488A 3490A 3491A 3492A 3501 3502A 3504 3505 3507 3509 3510 3511 3513 3514 3515A 3518A 3525A 3542A 3552A 3553A 3554 3571 3571 3572 3601 3602 3603 3685 5003 5040 5051 5054 5101 5101 5101 5205 5206 5206 5260 5260 5260 5260 54454 54454 54454 5451 5451 5457 5457 54614 54634 54654 54704 4822 126 13061 4822 051 20394 4822 051 20394 4822 052 10228 4822 051 20106 4822 117 11437 4822 051 20475 4822 051 20121 4822 051 20121 4822 111 31051 4822 111 31051 4822 111 31051 4822 050 21802 4822 050 22202 4822 050 21802 4822 050 22202 4822 052 10158 4822 052 10478 4822 051 20684 4822 053 11479 4822 117 12822 4822 053 11333 4822 117 12514 4822 052 10109 4822 050 22703 4822 050 24303 4822 050 28203 4822 050 24303 4822 050 25603 4822 052 10478 4822 052 11108 4822 052 11108 4822 052 10478 4822 052 10338 4822 052 11108 4822 052 11108 4822 17 12181 4822 053 21225 4822 17 12728 4822 252 60151 4822 4822 4822 4822 4822 16 82776 17 11488 17 11488 17 12568 17 11719 4822 050 28204 4822 4822 17 12765 16 83027 4822 052 10339 4822 053 21475 4822 051 20332 4822 051 20121 4822 17 11139 4822 050 21504 4822 050 21604 4822 4822 4822 4822 01 11186 16 90885 17 12168 17 12167 4822 051 20683 4822 4822 4822 4822 4822 4822 4822 4822
64. 488 30 31024 30 42488 30 34258 30 41275 30 41602 30 42606 30 42606 30 30862 30 34379 30 42488 30 31938 30 42488 30 42488 30 31938 30 10741 30 11185 30 42606 30 42606 30 41487 30 31024 30 42606 30 42606 30 10754 30 10256 30 10256 30 10256 30 34382 30 82029 30 60508 30 60508 30 60508 30 60508 30 60511 30 60511 30 60511 30 60511 30 60511 30 60511 30 60511 30 60511 30 60508 30 60508 30 60511 209 15685 209 15828 209 16309 209 16311 209 12635 30 60508 30 42353 30 42353 209 33293 209 13646 209 32918 30 60511 209 13181 30 40981 209 13176 209 16352 30 60508 30 63569 30 42159 30 63726 30 40981 30 44568 30 60508 30 63698 1000uH 10 8X10 FXDIND A 04 39uH PM10 UAW LINE 5mH 2A DMF 2820H 10mH 2A LALO2TB2R2J HF70BTL3 5X9R 100mH z 100mH z IND FXD LALO2 A 4U7 PM5A TFM SMT 130V SMT LAYER WIRE HF70BTL3 5X9R 27uH HF70BTL3 5X9R HF70BTL3 5X9R 1U 20 2 2uH 10 8X10 8 2uH 5 2 3X3 4 6 8uH 5 2 3X3 4 BA482 BAS216 BAS216 BAS216 BAS216 BAS216 BYD33D BZX79 B18 BYD33D BZX79 B56 BY228 95 BYD33J BYD33J BZX79 B9V1 BZX79 B27 BYD33D BYV27 200 BYD33D BYD33D BYV27 200 GBU6J GBU4J BYD33J BYD33J BYV95C BZX79 B18 BYD33J BYD33J BY229X 600 EGP20DL 5300 EGP20DL 5300 EGP20DL 5300 BZX79 B8V2 LTL307P BC857B BC857B BC857B BC857B BC847B BC847B BC847B BC847B BC847B BC847B BC847B BC847B BC857B BC857B BC847B TDA8844 N1 TDA8347C N3 TDA8377 N3 TDA8375A N3
65. 52 H A grg _3196_ SLT EU 5 d ie Wa e do o0 aa 2 E 162 S me T Erge vite Sig6 5 8 5 2 66 dh 4 9 ek A 1 0922 ln 0559 mm 2796 coco lam oco 1 VU EE 2 ducem 1o Sal 6255 He 201926 37 1 gosg oM Hm NSS cocz Ao NENG 5 ur Ei 7982 lt 9 9 lag Es DES l s 96 d i m Sh X 9gee o ze RER gage E 2648 fo lt lt acre v ME t i 5955 5 IEEE S ose m j 9222 CO do ji m e gt 288 M A PEN T ees 6252 EE eu JA 1 Vis e licr odo 1996 9s96 0091 9 a gt 5 lo m e N ig EES melted 6555 1056 lt AER 6295 N BAS 0697 d 22 Wim 1 Ka S 9 2 a x 9 0 Zaga 2 82096 o _ lt 5595 5055 f 2299 0499 8299 p L R96 EA E ei x 2494 B zose 18888 296 0099 Es 2092 0199 9 2671 198 02 5 24 790967
66. 5K 8K2 Y 3603 A OUT 3615 Aci I VOLUME 8 2 33603 8 2 10 11 12 7620 ST24W04B1 8K2 3603 4 7 2 BGL 53603 D A6 3 BG OR BG DK 8 2 NANG 63603 E A64 BLACK STR SW 8 2 CNN 73603 F 4 5 Sp STA LL 8K2 83603 G A6 6 ATS INT_EXT 8K2 93603 6 7 7 7 STANDBY AVL 8 2 10 3603 1 8 TREBLE 4 8 2 113603 J AT 9 BASS AM IN 4 8 2 123603 7 10 8K2 NANA 133603 L 7600 7601 SAA5297 P83C766 1V5 1 1 4 23601 4 8k2 EEPROM PAL MULTI only 3626 0 NTSC SW 33601 B 8k2 4 14 1008 2 3621 Y E 48601 C 8 2 1008 au 5 2025 8715 53601 0 8k2 1008 SCL 74 16 3627 P1 7 SDA 63601 P1 6 SCL 1 3 1 P1 2 INTO 8 2 73601 F A8 16 100R CHROMA 1 BG 4 17 CHROMA 2 STATUS 3628 P1 1 TO P1 O INT1 100R nah TRINORMA A for ITV purpose IR RECEIVER am IM33 Yao VDDM RESET XTAOUT A6 11 STANDBY A1 26 BS VOL VOL CH 100R 4 27 DN UP DN Bs 160
67. 6 JOULNOD 5 OISE GTST LIST A8 AS 8057 LOSC O0 T Noyo SOTS PIKES EOTS LYTE ATddNS 48 AS MOHHO A INO THNVd LLI 404 0626 0025 SAK TSSL Des Oe 0969 ie ciel 12940 DYI 9 JPA 6006 00 8dON LIOA S ZNId 29 9NId 4 NI YANAL NOHHO ATI AS N Ajddns Ag LAS yay VIN HAOA AWAK HAH aA IVNDIS O M 15 OW NO CIPSLODA8 LOO Agpurig PAID ONTIOS ON SUP 100 Krurud Sursuas 42940 7 087L 6879 8879 6 OGre 68rE 88 AS 1 101 NOHHO doot xoeqpeoj yay gt OZSLOI 1 aseqOA BE ONDINI TH P 19993014 Jo qpuejs 196 0 8065 TANLIId 100 1940 101293014 1940 XATSNONNILNOD 0661 1986 0986 1492 lt 0061 219 uid je aeon ONTIOS ON TANL Id ON NO FaN LOId ON OLbS sors 815 09 06 9 98 9 SISL 09bL Let iere 107 0679 1072 0969 32437023 1070969 PLES TLE 10791076 0679 6779 16761876 0 lt 79 6779 115431443 Ott lt 0 Err ott 98766870 PMO A9949 12249
68. 7202 MSP3400 MSP3410 on Nicam sound panel C Also Nicam mono stereo dual sound is decoded by 7202 For A P Latam and USA we use the BTSC decoding see 7315 in circuit diagram A8 NTSC SECAM sound system IC BTSC decoding IC General description of BTSC specifications The BTSC sound system is based on the AM FM method and is capable of broadcasting MONO information only MONO Carrier modulated STEREO information MONO C gt 1 2 L R and STEREO SC gt 1 2 L R DUAL information MONO C gt language A and SAP SC gt language B Circuit description new circuits STEREO amp SAP information STEREO MONO C gt 1 2 L R and STEREO SC gt 1 2 L R and SAP second audio channel The sinlge FM mono sound decoding will take place 7225 E see circuit diagram A4 167312 AN7318S in diagram 7 is an Automatic Volume Correction AVC present Automatic volume correction AVC function provides a constant output level of 18dBFS for input levels between OdBFS and 24dBFS In this way it is possible to adjust different sound sources eg Terrestric SAT channels SCART to equal volume level The increased volume of advertising is compensated as well The volume correction step width is quasi continuosly The filter maximum is performed with an attack time of 16ms and a programmable decay time i e 8 4 2 sec and 20ms 7311 TDA7057AQ in circuit diagram A7 is 2X3W stereo sou
69. ANEL 200v ANODE CRT FOCUS FOCUS HEATER dc G2 Ld PROCESSING 10 EHT INFO Tija ILC Y Y VB 5V LOT 9 11V LOT 6486 2486 8 e LOT 6488 2484 HFB a 7 i A2 2 B 11V_LOT 5480 HEATER gt 6463 T 3466 6464 X RAY 2469 PROTECTION 6467 3407 LINE DRIVE 6490 5 t 11V LOT p gt 11V_LOT j 2489 6449 HFB A5 21 E SYNC FRAME 3448 3449 6450 200 TO ipi vis 5 CRT PANEL 48V 29 6485 3485 RE WE 48V LOT gt X RAY PROT 6487 5487 3488 i BTSC 12 29 ONLY DECODING p gt 11V LOT 11V LOT 6481 6480 Pi P PROTECTION A5 12 8 6532010 007 eps 090398 Block diagram 2116 OnE A1 B 2622 2621 4 1 eris MS F C3 3142 3143 C2 5500 3671 rem SH 1 C6 1500 1681 C5 6510 7315 6590 11 P11 B3 LBL 3515 P2 7520 mel 7 maro o E T Weg 8 Pi A14 9323 5545 Wes 93191 AD P13 7311 9 x 17 L EEN 129 6 A20L ra21 7 TASIH Par 9 Disk 26 Aq 9510
70. Colour Television Chassis L7 3A AA M Sch Zu DSUN CEN WS GIS WI Service CL 86532010 001 ai 160298 Content 1 Technical specifications 2 2 Connection facilities location of panels 3 3 Safety instructions Warnings 4 and Notes 4 Mechanical instructions 6 5 Repair facilities 7 Software adjustments and Hotel mode 12 6 Block diagram 13 Survey of testpoints 14 Diagram supply voltages survey 7 Electrical Diagrams and print lay outs Diagram PWB Main PWB layout 16 Power supply diagram A1 17 16 Main PWB layout 18 Line drive diagram A2 19 18 Sync frame amp vertical drive diagram A3 20 18 Video Processing diagram A4 21 18 Control diagram A5 22 18 Sound processing diagram A6 23 18 Sound amplifier diagram A7 24 18 BTSC decoding diagram A8 25 18 CRT PWB Audio sound PWB 26 CRT module diagram B 27 26 Nicam sound panel diagram C 28 26 8 Electrical adjustments 29 9 Circuit Descriptions new circuits 31 10 Directions for use limited 38 11 List of abbreviations 46 12 Spareparts list 47 C Copyright reserved 1998 Philips Consumer Electronics B V Eindhoven The Netherlands 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 electron ic mechanical photocopying or otherwise without the prior permision of Philips Published by LV 9864 TV Service Department Printed in The Neth
71. D XRAY_PROT 2442 47n 3442 680K 3443 1M 3439 10K 0 DN CTT LLLI mv div D 5ms div 0 5mV div DC 5ms div 10V div DC 5ms div 10V div DC 5ms div 2V div DC 20us div FRAME VERTICAL BZX79 C39 10 11 11V LOT 25 100u 1K 29 2k2 1k8 2k2 1k8 BZX79 C18 11 AMPLIFIER GND FLYBACK GENERATOR THERMAL PROTECTION 48 LOT ONLY FOR 29 SANDCASTLE VERTICAL DEFLECTION COIL A BZX79 C39 TDA9302H STV9379F CL 86532018 004 270398 12 CL 86532018 014 010498 F11 2401 E8 2402 F9 2403 E9 2404 E10 2404 F9 2405 F7 2407 F7 2408 G10 2420 C6 2422 B5 2425 D5 2426 D5 2427 C4 2428 C5 2429 C4 2430 B6 2431 B7 2437 E5 2440 E6 2441 E6 2442 D4 3401 G10 3402 G10 3403 G10 3405 F7 3406 E7 3407 F7 3408 F7 3409 F10 3410 F10 3411 G10 3412 F10 3420 B5 3421 B6 3422 B5 3423 B4 3426 D5 3427 C4 3428 C5 3429 C5 3430 B6
72. DBACK SENSE OVERVOLTAGE MANAGEMENT OVERVOLTAGE PROTECTION UVLO1 13V6 9 3 9 CRT DISCHARGE REFERENCE PROTECTION DISABLE 2v2 4 2 ova 2v8 8 5 STANDBY Dmax amp SOFT STARTj4 CONTROL Vref i Soft Start amp Dmax BYD33J BYD33J OPERATION MODE V STANDBY MODE A 2545 EAR HOT GROUND 3571 160K 3573 4 VBATT 3572 2K7 470 7570 3 TL431CLP GND A5 26 CL 86532018 012 AI 010498 2 2 2 SK1B2 1080 5 1500 B3 1572 C8 2500 2501 2502 5 2503 2 2504 2505 5 2507 B6 2508 B6 2510 B7 2511 7 2517 5 2518 6 2520 E2 2521 64 2522 G3 2524 5 2529 DS 2530 64 2531 E2 2532 F2 2533 F2 2540 2541 C10 2542 2545 7 2550 10 2551 B11 2553 E11 2554 DIO 2560 C8 2561 D9 2562 F11 2563 Ell 2570 B9 2571 9 2572 8 2573 F8 2574 8 2575 8 2576 F7 2884 7 2885 6 3500 C3 3501 B4 3502 C2 3503 A4 3504 A3 3505 B3 3506 C5 3507 C5 3509 B7 3510 C4 3511 C7 3512 G3 3513 G3 3514 G6 3515 B5 3516 D7 3517 C6 3518 D7 3519 D7 3520 E2 3521 H4 3525 C5 3528 E6 3529 D6 3530 D4 3532 F2 3534 G2 3536 E2 3537 D3 3542 C2 3543 C10 3544 CIO 3545 CIO 3546 CIO 3547 CIO 3548 C11
73. M28 G5 M29 G5 1600 E2 1601 E2 1602 E3 1603 E3 1670 D11 1681 D8 2601 A8 2602 A9 2603 B10 2610 A2 2611 A3 2613 A4 2615 A2 2621 B10 2622 C10 2623 A12 2630 B2 2639 G6 2650 G1 2651 F1 2652 E3 2660 E3 2661 E4 2663 G5 2664 G5 2666 G6 2670 D9 2671 D11 2674 D9 2680 E9 2682 D8 2683 D8 2684 D9 2685 E11 2690 E8 2691 E8 2692 F8 2693 F8 2694 G8 2695 G10 2696 D6 2697 E4 2698 D7 3601 A B8 3601 B B8 3601 C B8 3601 D C8 3601 E C8 3601 F C8 3602 A F5 3602 B F5 3602 C F5 3602 D E5 3602 E E5 3602 F E5 3603 A A5 3603 B A5 3603 C B5 3603 D B5 3603 E B5 3603 F B5 3603 G C5 3603 H C5 3603 1 C5 3603 J D5 3603 K D5 3603 L D5 3604 G8 3605 G8 3606 G8 3607 C10 3608 F3 3610 A4 3612 A3 3613 A3 3614 A2 3615 A2 3616 A3 3617 A2 3618 A2 3621 B9 3622 B9 3623 A11 3624 A10 3625 B10 3626 B9 3627 C9 3628 C9 3630 B3 3631 B5 3632 B3 3633 B3 3634 B3 3636 C3 3637 C3 3640 D3 3641 D3 3642 D3 3650 G2 3651 E1 3653 G3 3654 D4 3655 D4 3656 G2 3657 E4 3658 F2 3660 E4 3661 E4 3662 F4 3663 F4 3664 G5 3665 H5 3666 G6 3667 G4 3670 D10 3671 C10 3674 D10 3681 D11 3682 E11 3683 E11 3684 E9 3685 E10 3686 E10 3690 E8 3694 F8 3695 F8 3696 F8 3697 G9 3698 G8 4600 A7 4601 D9 4602 D7 4603 G8 4604 C8 4605 D9 4607 D9 4608 D8 4616 B3 4617 D10 5600 A8 5601 A9 5603 G9 5620 A10 6600 A8 6610 A3 6650 F2 6653 F2 6661 G4 6663 G3 6690 E9 6691 F9 6692 F9 6693 F9 7600 B6 7603 D10 7608 F3 7610 A4
74. R SW BS1 BS2 O NTSC SW CHROMA 1 BG L CHROMA 1 STATUS CHROMA 2 STATUS CVBS EXT1 CVBS EXT2 CVBS IN CVBS OUT CVBS OUT 1 CVBS SOUND CVBS TXT DISCHARGE EAR EEPROM ESD ff FL A OSD GND GRD LOT HOR FLYBACK 12C IF INT EXT L_EXT1 LEFT_OUT MOD L 1N1 MOD 1N2 MOD 1 1 MOD 1N2 MONO STROBE MONO OUT NTSC PAL SECAM OSD R Y output from chroma demodulator Microcomputer Aquadaq layer on the outside of the picture tube Signal to mute the sound on the Audio out cinch Switching signal from UP to the Auto Volume leveller on the ITT on BTSC Panel or Rear Cinch UP 2 width CVBS R and Sound Blue TXT or OSD signal from C to the video controller 7225 5 Control signal for BASS Beam Current information Monochrome TV system sound carrier 5 5 MHz BG Sound carrier 6 2 1 Sound carrier 6 5 MHz DK Fast blanking signal to IC7725 5C to display OSD and TXT Black stretch switch TV band selection 1 signal TV band selection 2 signal Switch on signal for NTSC chroma oscillator 8 575 MHz Switch on signal for BG L chroma oscillator 8 582 MHz Switch on signal for NTSC chroma oscillator 8 579 MHz Signal to select the correct system in case of trinorma CVBS external 1 input signal CVBS external 2 signal CVBS internal 1 from tuner CVBS output signal CVBS output signal 1 CVBS for inter carrier sound detector CVBS fo
75. VBCL is normally about 4V if the beam current limiter is not active The contrast and or brightness reduction of the RGBout is proportional to the voltage decrease at pin 22 Horizontal synchronization IC 7225 5D and the line output stage see diagram A3 Protections The line deflection incorporates protections like e X ray protection If the will become too high the tube will radiate too much X ray this is detected by monitoring the flyback pulses at pin 11 of the LOT Beam current protection If the beamcurrent becomes too high the Bimos is able to reduces this by making the EHT info line low The circuitry around transistor 7481 in circuit diagram A2 will detect this and create a PROT signal The E W amplifier has two protections One protection for overcurrent for exampleshort circuit of E W FET and one protection for overvoltage like interrupted capacitor in lower half of the diode modulator Start up of the horizontal oscillator via the 8V gives a start up current to pin 37 if the voltage on pin 37 exceeds 5V6 the horizontal oscillator starts to oscillates at approx 25kHz Only if the supply pin of IC 7225 pin 12 at IC 7225 5A in diagram A4 becomes 8V the line frequency will change to 15625 Hz The horizontal synchronization separator separates horizontal pulses out of CVBS signals and synchronizes the free running horizontal sawtooth generator The horizontal oscillator sawtooth is converted into a s
76. VOLTAGE VOLUME NA SPATIAL STEREO PSEUDO STEREO FORCED TREBLE E BALANCE v AN7318S STANDBY_AVL CL 86532018_018 010498 M90 A9 2308 C3 2310 C4 2312 D4 2314 B5 2315 B8 2316 C8 2317 C8 2318 C8 2320 C5 2321 D5 2322 D5 2323 E2 2324 E2 2325 E2 2326 F2 2327 F2 2328 F2 2329 G2 2330 G2 2331 G2 2332 G4 2333 G5 2334 G5 2335 G5 2337 G8 2338 A7 2339 B8 2340 B8 2341 A9 2342 B9 2343 D12 2344 D11 2345 E8 2346 G9 2347 E8 2348 E9 2349 F9 2350 G10 2351 F10 2352 G10 2353 F9 2354 E9 2355 E9 2356 E10 2357 E11 2358 B2 2382 E10 2383 B7 2384 B7 2385 C7 2386 C7 2388 D7 2389 C10 2390 E2 2391 E2 2392 E2 2393 F2 2394 C10 3312 C3 3313 C3 3314 D4 3316 C4 3318 D4 3320 C4 3322 C4 3324 C5 3328 D6 3329 D6 3330 A6 3331 A7 3332 B8 3337 G8 3339 F9 3340 E8 3341 F8 3342 F8 3343 D8 3345 E9 3346 D10 3348 C4 3360 G10 3361 F10 3362 G11 3363 F11 3364 E10 3365 E11 3366 D11 3367 B7 3368 C8 3369 C7 3370 C8 3371 F10 3373 A8 4310 C8 4311 D11 4312 A5 4314 E2 4315 E9 4318 D3 4319 D11 4323 C2 5300 E7 6300 B7 6301 B7 7305 C3 7306 D3 7308 B5 7310 D3 7311 B9 7312 E8 7313 B2 7314 F8 A18 10 1 2V DC 184 OV DC 50mV div AC 0 2ms div A20
77. ack on your VCR is considered a TV channel by your TV if you connect via the aerial socket You must tune in to your VCR s test signal and assign the channel number Oto it Refer to your VCR s instruction manual for more details connect the RF cable to the VCR s RF in and connectthe RF out ofthe VCR to the aerial socket of the TV select channel 0 and tune in to to your VCR s signal to view the playback select channel 0 The TV s controls For25PT models PaP For 29PT models PHILIPS NI Ar Mains power 2 Red light indicator 3 Remote control sensor 4 Headphone socket 5 Volume adjustment 6 Channel selection Switch on or off the TV When light is on it indicates that the TV is on standby Note If no signal is detected by the TV after 10 minutes it will switch to standby automatically For the remote control to work it must be activated within the operating range of this sensor For connection of headphones To adjust volume level Press these 2 keys simultaneously will call up the 1st level menu Press these 2 keys again will exit menu Works as cursor left VOLUME or right VOLUME in a menu To select a lower or higher channel number Works as cursor up CHANNEL A or down CHANNEL v in a menu 7 e 0 3 c o 10 Direction for use aunjoid pue punos 10 sjesaJd P S
78. ctive of the type indication on these semiconductors CL 26532098 042 140792 Figure 3 2 tuner earth hot earth tuner aarde hete aarde la masse du tuner 1 la terre directe Tuner Erde heiBen Erde massa del tuner massa calda tierra del sintonizador tierra caliente with aerial signal without aerial signal met antenne signaal zonder antenne signaal FF avec signal d antenne x sans signal d antenne mit Antennensignal ohne Antennensignal con segnale d antenna senza segnale d antenna con la se al de antena sin la se al de antena normal condition stand by normaal bedrijf stand by fonctionnement normal 5 position de veille normaler Betrieb in Bereitschaft funzionamento normale modo di attesa funcionamiento normal posici n de espera rigure 5 5 EN 4 Mechanical instructions For the service position of the main carrier see figure 4 1 The main carrier can be removed by releasing the 2 carrier blocking lips 1 and pulling the carrier panel backwards B CL 86532010 002 ai 160298 Figure 4 1 5 Faultfinding tree amp Repair facilities 86 70 60 220 8102659810 816 8166 6558 ISL OL HOV IdHI PAD 5 ULT O9rL CLVO 04791979 BISL 09 9 1175 ISL O9PL OcSL OT NId LY SASTNd SHA 9066 2940 gor Letz 42949 OcSL OI I NId LV xoeqAqr 99 Dregrleg SYSS 0666 6266 EZE 1066 6156 816
79. displayed on the left side Example Suppose the display shows 3 4 0 0 0 This means the last found error is error number 3 the last found error but one is error number 4 and so on 40000 34000 REMARKS If the 176202 EEPROM is replaced by new one the set has to be installed according to the option code The ERROR BUFFER will be erased when the set is switched from service mode in stand by or via DST code 99 Error codes The following error codes have been defined 0 error 1 Internal RAM 2 General 12C error 3 EEPROM Configuration error Checksum error 4 12 error MSP3410 TDA9850 TDA9860 5 12 error TDA8374 6 EEPROM error ST24C04 7 12 error PLL tuner 5 5 4 5 5 5 Full option name EN Error code indication via blinking stand by LED The ERROR code are also indication via blinking of the standby LED This is important if no OSD function or picture is available The method is to show that the LED blinks as many as the error code indicates Example Error code 4 will result in four blinks of the LED 0 25 seconds ON and 0 25 seconds OFF After this sequence the LED will be OFF for 3 seconds and the blinking of the LED is repeated again Option abbreviation and Option status To select another option abbreviation use the MENU UP DOWN buttons and to change the status use the MENU LEFT RIGHT buttons Elucidation With above items the optio
80. e checked only for sets which have a mains isolated power supply This check can be done as follows unplug the mains and connect a wire between the two pins of the mains plug set the mains switch to the on position keep the mains cord unplugged measure the resistance value between the pins of the mains plug and the metal shielding of the tuner or the aerial connection on the set The reading should be between 4 5 MW and 12 MW e switch off the TV and remove the wire between the two pins of the mains plug The cabinet should be checked for defects to avoid touching of any inner parts by the customer Maintenance instruction It is recommended to have a maintenance inspection carried out by a qualified service employee The interval depends on the usage conditions When the set is used under normal circumstances for example in a living room the recommended interval is 3 to 5 years When the set is used in circumstances with higher dust grease or moisture levels for example in a kitchen the recommended interval is 1 year The maintenance inspection contains the following actions Execute the above mentioned general repair instruction Clean the power supply and deflection circuitry on the chassis Clean the picture tube panel and the neck of the picture tube Warnings amp ESD All ICs and many other semiconductors are susceptible to electrostatic discharges ESD Carel
81. e menu is shown below The MENU UP DOWN command can be used to select the next previous option the MENU LEFT RIGHT command can be used to change the option value S Service mode 9999 Life timer Software version 5 Faultfinding tree amp Repair facilities AS options description ERR error buffer VALUE 8888 7777 66 options bytes 3 4 3 0 O error code 5 5 1 5 5 2 5 5 3 Explanation L73AP21 1 0 The software identification version and cluster AS A two character short name for the option to be selected see table VALUE The value of the selected option ERR Error buffer display 34300 S The character S indicates that the TV set is in the service mode 9999 The hexadecimal value of the life timer 8888 7777 66 10 digits of value representation of the option byte contents Software identification If there is a change of the software this number will be changed Life timer run timer This life timer only counts the normal operations hours and not the stand by hours Also at every switch on the life timer is incremented by 1 Option code The possible options are listed in the following table 1 Error buffer The last five errors stored in the NVRAM EEPROM 7620 are shown in the service main menu this is called the errorbuffer An error will be added to the buffer if this error differs from the last error in the buffer The last found error is
82. e the overload situation remains present the SMPS will give foldback again slow start etc as a result in case of short circuit or overload the TV will be in a good audible hick up mode Secondary side Output voltages See 9 1 2 for output voltages Regulator IC TDA 8319 7541 This is a low dropout regulator This IC has an output voltage of 5 Volts 8 Volts and RESET signal the input is 11 Volts The Pin configuration of this IC is listed below e Pin 1 of the IC is input 1 and the output 1 pin 9 that is 5 Volts DC lt Pin2 of the IC is input 2 and the output 1 pin 8 that is 8 Volts DC lt Pin 3 of the IC is a timing capacitor input and controls the turn on delay of the reset signal e Pin4ofthe IC is a disable pin connected to standby pin of the microcontroller if the voltage below 0 5 Volts the 8 Volts output will be disabled lt Pin 5 of the IC is a common ground lt Pin6 ofthe IC is a reset voltage output connected to the microcontroller This reset output is developed with respect 5 Volts output level of 4 95 Volts Pin 7 of the IC is a program pin for output 2 in this circuit this output pin 8 is programmed to 8 2 Volts by resistors 3552 3553 and 3554 Other features of this IC Built in thermal protection e Built in over current and short circuit protection for 5 Volts and 8Volts Low dropout voltage EN 9 Circuit description new circuits 9 6 SINGLE CHIP PROCESSOR 7225
83. ee amp Repair facilities indication in hexadecimal form of the options settings of the relevant set 4 8 Expend EX ON OFF Games GM ON OFF Hospital mode HS ON OFF Monitor No Ident NI ON OFF NTSC Play Back NP ON OFF Spatial SA ON OFF Sound Board SB MA Mono All MM Multi Mono ND ITT Nicam MSP3410D NB NICAM MSP3410B IT ITT2CS MSP3400 50 TDA 9850 60 TDA 9860 52 BTSC TDA9852 55 BTSC TDA9855 Smart Picture Term SC ON OFF Control Smart Sound SS ON OFF Bimos Standby ST ON OFF Surf SU ON OFF Multi System SY AF AP FULL MULTI SS SINGLE SYSTEM AD AP DUAL AM AP MULTI 2N Binorma 3N Trinorma 4N Fournorma Tuner TN ON OFF Volume Limiter VL ON OFF Video Mute VM ON OFF Remote Control W1 ON OFF External 1 XT ON OFF External 2 2X ON OFF TDA884X Family 88 ON OFF OPTION code OPT is the abbreviation of OPTION this abbreviation refers to the following 12 digit hexadecimal option codes BFDD FBEF 2C The option code can not be selected It only give an quick 5 6 SAM Service Alignment Mode This menu is being displayed whenever SAM is entered In SAM you are able to make tuning adjustments Alignment of white tone adjustment of picture geometry Sound alignment VSD and AKB enable disable black current loop The overview of the menu is shown below General The following items of the sub menu
84. erlands Subject to modification 4822 727 21566 5 PHILIPS EN 1 Mains Voltage Mains frequency Power Consumption in stand by Power Consumption normal mode Chassis mains isolated Aerial input impedance TV Picture tube range EHT voltage for 25 EHT voltage for 29 Max EHT power Sound output power Picture S N at 70uVolts Technical specifications 150 276 Volt 90 276 Volt 50Hz 60 Hz lt 10 Watt 25 75Watt 10 29 90 Watt 10 Yes 75 Ohm coax 25 and 29 27 KVolt 30 KVolt Linitted at 33 Watt 2X3 Watt 2X 5 Watt gt 46 dB unweighted gt 58 dB weigted 2 Connection facilities EH VIDEO2 VIDEO 1 IN VIDEO VIDEO ANTENNA L AUDIO AUDIO R 08 CL 86532010 003 ai 160298 Volume Channel Red CL 86532010 004 ai 160298 2 1 Cinch 2 2 Head phone Video 1 750 8 6000 4mW Si Audio L 0 5Vrms gt 10 Audio R 0 5Vrms gt 10kQ 2 3 Location of panels CRT PANEL NICAM PANEL MAIN POWER SUPPLY LINE DRIVE SYNC FRAME VERTICAL DRIVE Q VIDEO PROCESSING BIMOS IC CONTROL SOUND PROC SOUND INTERFACE o o SOUND AMPLIFIER N gt BHEBHHBHBEHB Iq BTSC DECODING CL 86532010 005 ai 160298 EN 3 Safety instructions Maintenance instruction 3 1 3 2 Safety instructions for repairs A
85. ess handling during repair can reduce life drastically When repairing make sure that you are connected with the same potential as the mass of the set by a wristband with resistance Keep components and tools also at this same potential Available ESD protection equipment anti static table mat large 1200x650x1 25mm 4822 466 10953 anti static table mat small 600x650x1 25mm 4822 466 10958 anti static wristband 4822 395 10223 connection box 3 press stud connections 1 M ohm 4822 320 11307 extension cable 2 m 2 M ohm to connect wristband to connection box 4822 320 11305 connecting cable 3 m 2 M ohm to connect table mat to connection box 4822 320 11306 earth cable 1 M ohm to connect any product to mat or connection box 4822 320 11308 complete kit ESD3 combining all 6 prior products small table mat 4822 310 10671 wristband tester 4822 344 13999 In order to prevent damage to ICs and transistors all high voltage flashovers must be avoided In order to prevent damage to the picture tube the method shown in Fig 3 2 should be used to discharge the picture tube Use a high voltage probe and a multimeter position DC V Discharge until the meter reading is OV after approx 30s Together with the deflection unit and any multipole unit the flat square picture tubes used from an integrated unit The deflection and the multipole units are set optimally at the factory Adjus
86. ge 37 for blockdiagram 1C7520 control mechanisms 1C7520 controls the T on time of FET 7518 in all three operation modes Secondary output sensing controls the secondary output voltages via the feedback voltage pin 14 prim current sensing controls both the secondary output voltages and the maximum 1 prim via the current sense voltage pin 7 Demagnetization control prevents the transformer T5545 from going into saturation via the so called DEMAG function at pin 8 this will cause slow start operation Secondary output voltage s feedback 14 of 7520 Voltage feedback for T ON control Regulation of the SMPS is via pin 14 Winding 2 5 has the same polarity as winding 16 18 so variations of the VBATT can be sensed and feed back to pin 14 The control voltage of winding 2 5 during off period of TS7518 the Opto coupler 7581 conducted rectified by D6540 smoothed by 2540 and coupled via 7581 and EN 9 Circuit description new circuits 9 3 3 9 3 4 9 3 5 9 3 6 9 3 7 adjustable by 3572 For the information at pin 14 of 7520 controls each portion of energy transferred to the secondary side such that the output voltages remain nearly independent of load variations l prim sensing pin 7 IC7520 The current sense voltage at pin 7 is a measure for the through FET7518 The l prim is converted into a voltage by R3518 The current sense voltage at pin 7 is used to control b
87. ghlight INSTALLATION Select INSTALLATION with the lt GE key LANGUAGE is highlighted Select the language of your choice with the lt gt key From now on all menus and screen information will be in the language that you have chosen CD 5 Exit with the C key There are 2 ways to tune in channels automatically by AUTO STORE or manually by MANUAL menu Auto store Use to tune in channels automaticall 5 Call up 1st level menu with the key Scroll up with the key to highlight INSTALLATION Select INSTALLATION with the lt gt key Scroll down with the key to highlight AUTO STORE Select AUTO STORE with the lt or gt key A tuning bar appears and the TV will automatically store all available channels Channels will be stored starting from the next channel number 11 e 0 3 c o installing the tv CHILD LOCK gt SURF INSTALLATION gt BRIGHTNESS mmm 44 COLOUR 28 SYSTEM AUTO SEARCH VI FINETUNE elen SYSTEM AUTO SEARCH FINETUNE mmm CHANNEL 6 STORE SEARCH FINETUNE mb CHANNEL 4 STORE gt Manual This menu enables you to search and store every available channel manually T 2 10 11 12 Call up 1st level menu with the amp key Scroll up with the key to highlight INSTALLATION Select INSTALLATION with the lt
88. he or lt key to highlight the item that you wish to adjust 3 Selector adjust with the lt S or gt key 4 Exit with the 5 key Sa 24 ES 2 gt D 4 E PHILIPS BASS 50 INCREDIBLE ST OFF AVL OFF Incredible stereo A feature to enhance stereo sound Adjustment done will automatically be stored in the PERSONAL mode of the SMART SOUND feature 1 Call up 1st level menu with the 2 Scroll down with the key to highlight INCREDIBLE ST 3 Select ON with the lt or gt key 4 Exit with the e key INCREDIBLEST INCREDIBLEST AVL OFF AVL OFF SLEEPTIMER OFF SLEEPTIMER OFF 19 aen 10 uondang OL 5 settings AVL Auto Volume Leveller This feature if switched on will automatically adjust any sudden changes in the TV s volume to a preset level 1 Call up 1st level menu with the key 2 Scroll down with the key to highlight AVL 3 Select ON with the lt or gt key 4 Exit with the C 5 key SURF A CH BASS 50 BASS 50 INSTALLATION INCREDIBLE ST OFF INCREDIBLE ST OFF BRIGHTNESS m 44 AVL OFF AVL ON COLOUR 23 SLEEPTIMER OFF SLEEPTIMER OFF CONTRAST m 55 CHILD LOCK gt CHILDLOCK gt Smart Sound These are some sound presets on the TV for your viewing pleasure Press the key repeatedly to select VOICE MUSIC THEATRE or PERSONAL Note NORMAL for certai
89. ion 33 9 to 40 4 MHz For PAL BG SECAM BG DK sets a SAW filter with a bandwidth of 6 5 MHz is used 32 4 to 38 9 MHz IF demodulator IF demodulation is done with reference circuit L5260 at pin 3 and 4 7225 5 AGC control of tuner via pin 54 7225 Top sync level is used for AGC inside 7225 5 AGC adjustment is done by 1 C control via entry into the SAM service menu C2202 at pin 53 determines time constant of the Base band CVBS signal at pin 6 of 7225 normal 3V2 is fed to the sound trap filters 1206 1207 1208 1209 and 5206 and returns to pin 13 of 7225 5 for source selection and video processing diagram A6 The NTSC_ SW signal from the control microprocessor switches on transistors 7216 and 7217 to activate filter 1209 when an NTSC signal is received Demodulation for sound IF takes place for the various signals as follows For single mono signal the CVBS Sound signal goes to filter 1104 for 4 5 MHz and filter 1102 for 5 5MHz The sound is connected to pin 1 of 7225 for demodulation 9 6 2 PAL NTSC Processing 1 7225 5 see diagram 1C7225 5B contains source selector and PAL NTSC colour decoder The main functions are Source Selection The input selector has CVBS_INT lt CVBS EXT1 Y CVBSEXT2 EXT2 as inputs which can be selected via the 12C bus Colour Decoder the main functions are PLL VCO The PLL operates during the bu
90. ith Slow Start circuitry undervoltage Protection Circuit of the secondary supply voltages In case the load decreases under a certain threshold level the SMPS will switch into stand by mode in stand by SMPS is in the so called reduced frequency mode this is nominal about 20 kHz 9 2 2 The VBATT 140 Volts for A P and 130 Volts for LATAM output gives a stabilized VBATT for 25 and 29 tubes in normal operation and approx 140 Volts DC for A P and 130 Volts for LATAM in stand by mode 7541 8139 having a stable regulator for 5 Volts and 8 Volts supply and also a built in protection circuit for 5 Volts and 8 Volts supply is present If pin 4 is low in the standby mode the IC disables the supply output voltage of 8Volts so 7225 TDA8374C line output stage will be shut down If no 8 Volts supply is present transistor 7542 will switch on this will cut off the VBATT it also performs a fast CRT discharge If the power is switched off pin 6 of 7541 will be low and the protection circuit starts to shut down the 5 Volts and 8 Volts Output voltages Power output secondary output voltages 14 Volts for the audio amplifier 183 Volts for the audio processing 5 Volts for the control part is also available in standby reset 8 Volts for the video processing and Nicam 140 Volts for A P and 130 Volts for LATAM for the line output stage and the tuning system
91. ives the line output stage consisting of TS 7445 and transformer 5445 via drivers TS 7440 7441 The line output stage supplies the deflection current and the following supply voltages see also the power supply block diagram Output voltage See diagram A2 LOT 5445 Line output transformer output voltage 200V focus and ff for the picture tube e 200V for the CRT drive e 5V for the control and tuner supply e 9V for the tuner supply e 11V for the control and vertical drive output e 11V for the vertical drive output Vertical synchronization IC 7225 5D and the frame amplifier IC 7401 The vertical oscillator 50Hz is controlled by the incoming video signal The vertical output is driven in anti phase via the pins 46 and 47 At pin 41 the so called Sandcastle pulse is 9 6 5 9 7 EN 9 Circuit description new circuits present the sandcastle pulse is applied to several parts of the circuits for timing purposes Frame amplifier In principal the frame output stage IC 7401 TDA9302H is used for the vertical deflection This IC is controlled at pins 1 and 3 by the vertical control signal of IC 7225 5D and a deflection current is generated at pin 5 The vertical flyback signal is generated at pin 3 of this IC Protection of IC 7401 depending on 11V and 11V supply to drive the vertical deflection CRT In case of supply voltage 11V or 11V needs a too high current the VFL pin 3 of IC 740
92. k mode you will need to use your remote control to key in the 4 digit confidential code that you have entered when you locked it 0 3 c o 10 Direction for use Sc Aen y m xg 6 deis j ojun 03 YSIM 10 03 sdeys Jeaday 8 eui pojun 03 Palas 01 Ae lt 10 gt sseJd 2071 346146 4 Aen ZS SUD umop 10425 79 noA Jaquunu ul e 888 y epo nof JJ SAIL peyubiubiu aq T3NN HI 3294405 e Wayi 10 euo Aue oj 5508 jou S 3 NG ue 20 DUU APOD J 5201 Q TIHO jenuepyuoo WHIp p eui ul Ae p 1949 Ae lt 40 gt 55944 E 7201 Ae ZEN umop 110125 7 IST dn DOUD OL NOUVTIVISNI 3905 NV 82 MOD v
93. l mode on or off HOTEL MODE SUB MENU ON 38 HOTEL ON HOTEL CHANNEL 38 BLANK FROM 6 TO 6 HOTEL MODE SUB MENU OFF 38 HOTEL OFF 6 Block diagram
94. l right or left key The rest of the parameters can be scrolled through by using the control up down keys RES 5 tree amp Repair facilities 5 6 5 All changed data will be stored into the EEPROM after returning to the service main menu via the OK key AUDIO The sound adjustments sub menu contains the following information S AUDIO AUTO gt ST NT 7 SAP NT 7 LA 7 WIDEB 31 SPECT 31 5 7 5 8 5 9 The TDA9852 sub menu is only available if the BTSC sound IC is present The settings can be changed by first highlighted the respective item using the control up down keys and then increment or decrement the value by using the control right or left keys The default value shown in the diagram are the normal values For service purposes the normal values can be used NOTE The value should not change unless it is absolutely necessary Dealer remote used as a Dealer Service Tool DST With the DST under mentioned extra service features can be executed The main features are Direct entering SDM via the DEFAULT button on the DST e Direct entering SAM via the ALIGN button on the DST Read the error buffer even if the OSD is not working at all This is done via the blinking LED procedure REMARKS e Entry of the SDM and SAM the DST is possible in all states except from stand by All software is suspended till the dealer remote mode is left The service mode sta
95. n i z 2 wo EN Y T 2 v ve ol D oi 9 pog R e 2 x 1 7666 z BE A LO 2 D m gt lt 278 3 S E N 119 m 2 Ha ses 3 2 UT bes 51 e 9 Mt ob OS 16 16 1 p Lr 1 ELS X IN ot P ERE Tee SEE 07 605 2952 nga ra 5 0952 Ges E gt A 5 ZEN Ip m AER j a P DIS x 6950 9 55 222 a wl ms d p b lol 159 vass 9 e Weser TIN s H S e NS HUES T 2995 Nb e T m N Qeg6 D 3 e TIGE Si iT WII 70T ahas ika 2 6 egen _ eee _ 6166 E gt ELSO e E RI So m EE IAN B UU eS D r d i5 3 Loop NCC CN sli reve Y o Win AL a SS BS 2296 A lt gt sec cree ol DUT Eh d LJ AUI 555 JF D x 0659 lal los A ko E ag TRS eats 8126 45 TOONE 4156 8255 24 7155 Oo 53 1 mer arcc HN ee 9126 20
96. n model Emphasizes speech frequency 2 my Em Emphasizes bass frequency so that music is dynamic 1 2 3 D O 6 Emphasizes low and 7 8 9 high frequencies to give exi sensation to the action and a wider sound ambience cue PERSONAL Your personal PHILIPS sound settings EE Other features Sleeptimer Sets timer to switch TV to standby in steps of 15 minutes to a maximum of 120 minutes To disable timer set to OFF To set timer SURF ACH 1 Call up 1st level menu with the INSTALLATION gt BRIGHTNESS mammmm key COLOUR 28 CONTRAST m 2 2 Scroll down with the lt key to highlight SLEEPTIM ER INCREDIBLE ST AVL SLEEPTIMER CHILDLOCK 335 3 Select time period with the lt gt key CD 4 Exit with the CD key Child Lock This feature enables you to lock channels which you do not wish others e g children to watch You have a choice to lock all channels inclusive of AV1 or AV2 or individual channel up to a maximum of 5 channels Once a channel is locked if you call channels up with the CHANNEL v or A keys on the TV there will be no picture and sound access to the INSTALLATION sub menu is disabled You can only call up channels with your remote control A message LOCKED and CODE appears on the screen each time you try to call up a channel with the controls on the TV To bypass the loc
97. n statuses stored in the EEPROM can be changed This is necessary if the EEPROM is replaced by a fresh EEPROM because a fresh EEPROM is initial loaded with default options by the uC The options stored in the factory can differ per type and stroke number Therefore itis necessary to load the EEPROM with the correct options configuration These options are indicated on a sticker glued inside on the rear cover of the set Remark For sets with BTSC sound also the options TUN FOA TUN FOB EXT FOA and EXT FOB have to be set See for these items Paragraph 6 Loading a fresh EEPROM Switch on the TV via the power switch Audio mute the TV to get no big noise Change the option codes as indicated on the sticker on the rear cover Put TV in stand by via the remote control e Switch on the TV again via the remote control Switch OFF the TV via the power switch Switch on the TV again via the power switch In the table all the possible option abbreviation with full option name and possible status are listed Table 1 Options description for L7 3 versions Option name Status Possibilities abbreviation Auto cable detect AC ON OFF AFC Status AF ON OFF Auto scan AS ON OFF AVL AV ON OFF Balance BL ON OFF Bilingual Mono BM ON OFF Bass Treble BT ON OFF Child Lock CH ON OFF Clock CK ON OFF Contrast plus CP ON OFF EW control EW ON OFF LEN 5 Faultfinding tr
98. nals are identified the reference frequency is continuously available at pin 33 and superimposed on a 1 5V DC level When SECAM is identified by IC7241 the reference signals which is generated in packets form and superimposed on a 5V DC level is supplied to pin 33 of IC7225 The ident signal IDSM 1 is supplied to the ASM ASM Automatic System Manager R Y B Y demodulation The ASM is able to decode PAL NTSC colour standards and in combination with IC7241 TDA8395 multi standard applications can be realized The different possibilities are controlled by the 12C bus input commands which are communicated to the ASM via the 12C bus The 12C bus input commands also indicates which crystals must be connected to pins 34 and 35 This is essential for correct calibration of the horizontal oscillator For PAL NTSC standards the B Y R Y baseband signals are extracted from the chroma signal by the B Y R Y demodulators filtered and supplied via the output Switch to pins 29 and 30 If SECAM is identified by the SECAM decoder IC7241 and no PAL NTSC is identified by the ASM then the ASM will open the switch B Y R Y This implies B Y R Y signals from the SECAM decoder will be directly connected to pin 29 and 30 without extra loading 9 6 3 Circuit description new circuits Video controller IC7225 5C see diagram A4 The main functions are Y B Y R Y signal processing matrix RGB signal selection processi
99. nd 19 Black Stretcher The black stretcher circuit which is only operational during line scan extends the gray signal level towards the actual black level actual black level measured during burstkey The amount of extension is dependent on the difference between actual black level and the darkest part of the incoming video signal The darkest part of the videosignal is registered in the capacitor at pin 39 by means of an internal discharge current of approximately 130uA The black stretcher is made inactive if the voltage at pin 39 is set to ground This is done by turning on transistor 7220 the command blackstraw coming from the microprocessor if power button on the remote control unit is activated Beam Current Limiter The beam current limiter circuit functions as an average white limiter as well as peak white limiter The average white limiter needs external circuitry comprising of 7265 and associated components to function the peak white limiter is an internal detection circuit The function of the beam current limiter average white peak white limiter reduces the contrast and brightness of RGB signals For beam current limiting the difference in beam current 1BCL and an internal charge current 1 CHARGE is stored in capacitor 2460 on pin 22 If gt 1CHARGE voltage VBCL at pin 22 will decrease For beam current limiter contrast reduction begins if VBCL 3 5V and brightness reduction begins if VBCL 2 5V
100. nd amplifier BLOCK DIAGRAM MC44603P DEMAGNETIZATION Vdemag out DETECTION 18V SYNCHRONIZATION INPUT Vpin 10 Yos 9 STAND BY REDUCED FREQUENCY Vcs out VOLTAGE FEEDBACK INPUT E A OUTPUT FOLDBACK DEMAGNETIZATION MANAGEMENT reference block _________ SCH BUFFER 3 OUTPUT Van Vref OVER VOLTAGE MANAGEMENT OVERVOLTAGE PROTECTION UVLO2 Vcc enable Vcc enable MC44603 FOLDBACK CURRENT SOFT START Css meega INPUT SENSE INPUT Ven VOLTAGE MODE CONTROL Figure 9 1 Connecting peripheral equipment Equipment such as VCR Laser di the video and audio AV sockets sc player VCD etc could be connected to atthe back of the TV Switch off the TV and equipment before making any connection Connection for playback Laser disc player 1 Connectto AV sockets connectthe corresponding sockets of the equipment to that of the TV to view the playback select a channel named AVI if connection is made to Sockets at VIDEO 1 in or AV2 if connection is made to sockets at VIDEO 2 in Note If you have connected a computer game set to VIDEO 1 in select a channel named 1 to playback If your connection is made to VIDEO 2 in then select to playback 2 Connectto aerial socket only for VCR The playb
101. ng output stages Black stretcher Beam current limiter BCL PWL Automatic black current stabilization ABS Y B Y R Y signal processing matrix The luminance at pin 27 is internally AC coupled to the luminance clamp which is operational during burst key period The luminance signal is supplied to the RGB matrix circuit via the black stretcher The B Y R Y signals supplied to pins 31 and 32 are clamped during the burst key period The signals are then supplied to the colour difference matrix to select the desired matrix formv either PAL NTSC or Japanese NTSC matrix The selected matrix is controlled via the 12C bus For RGB matrix the signal outputs from the colour difference matrix are added with the luminance signal in colour to generate the internal RGB signals RGB signal selection processing output stages Within the RGB signal selection there are three modes RGB internal Fast RGB insertion TXT TXT B TXT on pins 23 24 and 25 OSD mode Teletext Two different types microprocessors 7600 7601 are used one with teletext TXT and one without teletext The micro controllers are P83Cx66 42 pins Normal ROM size varies SAA529x 52 pins Control ROM size withTeletext varies P83CX69 52 pins Control with ROM size Close caption varies Type of Type of tuning System Countries micro controller P83Cx66 PAL SECAM SAA529x PAL SECAM P83Cx169 PLL BiN
102. or left key Picture demodulator adjustment Connect a pattern generator e g PM5418 with a cross hatch Connect an oscilloscope 1ms div to pin 6 of IC 7225 5A and adjust L5260 so that the overshoot response is minimum Select a colour bar signal and verify if the picture is OK 34 4MHz Trap Alignment NOTE For Pal multi set only GENERAL SET UP Connect Frequency Synthesizer PM5193 with sine wave and signal strength of 100mv rms 100dBuv via a 50 ohm cable terminated with a RC network 50ohm 10nF and connect to tuner C CUT C CUT OPEN Output detection points at saw filter coil 5040 pin 3of 1050 The capacitor is in series with the signal the resitor is vonnected to ground Adjust L5040 for minimum amplitude VG2 and White D settings Vg2 cut off alignment Connect a pattern generator e g PM5418 with a black picture Set picture controls of the TV set as following Brightness 25 Colour 30 Contrast 50 Switch on the TV set and measure with a 100 1 scope probe at the cathodes of the picture tube socket pin 6 8 and 11 of CRT sockets C83 84 alternately pin 6 for Green pin 8 for Red and pin 11 for Blue Measure the level of the pluses and adjust the level of the highest pluses by means of the Vg2 potentiometer lower knob of LOT 5445 The DC level must be 140 Volts 2V DC for 25 tubes and 160Volts 2V DC for 29 picture tubes EN 8 Electrical adjustments 8 2 2 White D adjustment software adjus
103. orma Latam TriNorma The oscillator to be used is 12MHz a crystal oscillator will be used for all the micro controllers Incase of TXT this function is integrated together with the control part in one and the same uC This uC is indicated in the diagrams with the outer pin numbering Incase of no TXT another C is used with less pins This uC is indicated in the diagrams with the internal pin numbering In the description below the pin numbers are the numbers mentioned outside the housing of IC 7600 IC7600 with TXT and 7601 without TXT case of the C with integrated teletext function the CVBS TXT signal is fed to pin 23 the TXT and OSD information are combined at pins 32 33 and 34 Before the RGB signal selection the RGB signals are clamped to similar DC level during burst key period The selection is controlled by the RGB insertion input voltage at pin 26 Voltage at pin 26 selected RGB signals 0 3V RGB internal 0 9V V R_TXT TXT B TXT fast insertion at pins 23 24 and 25 gt 4 050 can be inserted at the RGB out pins 9 6 4 The contrast brightness and white point RGB adjustment on the selected RGB signals are controlled by 12C commands After the adjustment three RGB black levels are added to the RGB signals These three signals are blanked when the RGB blank signal is active The RGB output stages supply the buffered RGB signals pins 21 20 a
104. oth the secondary output voltages and the maximum see peak current limiting Demagnetization control via pin 8 Of 7520 Winding 8 9 has the same polarity as the secondary windings that are supplying the load As a result the voltage across this winding is negative during T on positive during T off and oscillating during T dead The so called demagnetization block DEMAG IC7520 function at pin 8 17520 is used for blocking the output pin 3 during the time that there is still energy in the transformer 1sec not zero This is realized by delaying the T on until the demagnetization is completely finished In this way the currents and voltages at the moment of Switching on the FET are controlled 1C7520 control The error amplifier block A compares the feedback voltage at pin 14 with an internal reference voltage of 2V5 The output voltage V error out of this error amplifier is fed to another comparator block B This comparator also compares the V error out and the current sense voltage at pin 7 When the current sense voltage at pin 7 becomes higher than the output voltage of the error amplifier V error out the comparator B gives a spike the output of comparator B is the so called current sensing output voltage Vcs out Flip flop Flip flop in block C drives the output pin 3 via a buffer amplifier block D The flip flop is set by the positive edge of the output of the oscillator V osc and reset
105. quare wave voltage with variable duty cycle This square wave at pin 40 is fed to the line output stage The time constant of the synchronization circuit is automatically internally determined by IC 7225 5D Pin 41 is SANDCASTLE output and also HORIZONTAL FLYBACK input The SANDCASTLE has an output current some mA the amplitudes of sandcastle pulse is burst 5V3 line blanking 3V and during frame blanking 2V e If the input acts as a HORIZONTAL FLYBACK pulse the input has a current of 100 300 mA This horizontal flyback pulse compares the phase of flyback pulse with phase of the horizontal oscillator if the phase is not correct the duty cycle of horizontal oscillator will be adjusted Flash protection The BCI info is applied to pin 42 of 1C7225 5D If due to a flash in the picture tube the voltage at pin 42 is gt 6V the horizontal drive will be switched off immediately If the voltage is again lt 6V the horizontal drive will be switched on again via the slow start procedure e EHT over voltage protection The BCI info is also applied to 50 of IC7225 5D First the BCI will compensate vertical picture amplitude variations due to beam current variations The control range is between 1 2V and 2 8V However if the voltage at pin 50 exceeds 3 9V the EHT overvoltage protection will be activated and the horizontal drive is switched off The line output circuitry In principle the line output stage pin 40 of IC 7225 5D dr
106. r TXT processing in uC To have a fast discharge after switching off the set Earth Electrical Erasable Programmable Read Only Memory Electrical Static Discharge Filament heater voltage from LOT to the picture tube Filament voltage for CRT Green TXT or OSD signal from the uC to 1C7225 5C Ground Ground of LOT Horizontal flyback pulse used for looking the horizontal oscillator Digital Control bus of the microcomputer Intermediate frequency signal for sound processing Switching signal for Internal or external audio video switching Audio left external 1 Audio left out SCART 1 in left SCART 2 in left SCART 1 in righ SCART 2 in left Strobe signal for HEF 4094 on multi mono sound panel Audio mono out NTSC colour system PAL or SECAM colour system Blue TXT or OSD signal from the uC to the video controller 7225 5C RAM RESET1 RF_AGC RIGHT_OUT ROM SAM SANDCASTLE SCL SDA SDM SECAM_REF SID STA LL SIF STANDBY TREBLE V_TUNE VFB VFL VG2 VOLUME Random Access Memory Reset signal for the uC Automatic gain control signal for tuner Audio right ou Read Only Memory Service Alignment Mode Sand castle signal from 1C7225 5D to delay line 107255 and SECAM chrominance decoder 7241 Clock line of the 12C bus Data line of the 12C bus Service Default Mode predefined mode for faultfinding SECAM reference Sound identification stereo available france System L
107. rams are measured in relation to earth Never use a heatsink as earth For the adjustments a colour pattern generator PM5418 has been used Pattern generator type PM5193 optional Settings on the carrier panel 140 V supply voltage for 25 and 29 picture tubes Connect a multimeter DC across C2551 Set brightness at mid position and contrast at maximum Apply a pattern generator with a colour bar Adjust potentiometer R3572 to 140 Volts 1 V DC Geometry adjustments software adjustment Set pattern generator e g PM5418 with colour bar pattern and connect to aerial input with RF signal amplitude 1mv Enter SAM mode byusing the Dealer Service Tool or short 8 1 5 circuit service pins M28 and M29 on PCB and switch power ON The menuis displayed whenever SAM mode is entered Enter into GEOMETRY menu Vertical Amplitude and position Select item VSH and set vertical shift to 31 Nominal 8 1 6 value Select item VAM and align the top of the screen with vertical amplitude Select item VSL and align the bottom of the screen with vertical slope Horizontal Amplitude and phase Selectitem HSH and align horizontal shift until picture to center of the screen Selectitem EW and align the picture width only those sets with East West drive circuit Select item PW and align East West parabola for straight vertical lines Select item TC and align east west trapezium for a rectangle 8 2
108. rst key period It synchronizes the VCXO oscillator with the frequency and phase of the incoming chroma burst For alternating burst PAL standards a loop filter enables the PLL to synchronize with the average burst 180 degrees phase PAL NTSC Identification Interface The 0 and 90 degrees reference signals from the VCO oscillator are supplied via the HUE phase circuit to the B Y and R Y burst demodulators respectively The demodulated burst from the B Y burst demodulator is supplied both to ACC detector and NTSC indent circuit the NSTC indent circuit is an integrator Once the integrator output exceeds the NTSC killer level an NTSC burst has been identified IDN 1 Therefore the IDN information provided the ASM Automatic System Manager with NTSC colour indent information The demodulated burst from the burst from the R Y burst demodulator is supplied to the PAL identcircuit via a AL switch the PAL ident circuit is also an integrator Once the integrator output exceed the PAL killer level a PAL burst has been identified IDP 1 IDP information provides the ASM with PAL colour ident information The SECAM interface allows bi directional communication between IC7241 TDA8395 and the ASM for SECAM identification If the VCO oscillator is oscillating at 4 43 MHz the reference frequency of 4 43mhz is superimposed on DC level and is supplied from pin 33 of 7225 to pin 1 of IC7241 If PAL NTSC sig
109. s can be selected with the UP DOWN arrow keys on the user remote control Entry into the sub menus is executed with the VOL VOL arrow keys SAM MAINS MENU S AKB 0 VSD 0 TUNER gt WHITE TONE gt GEOMETRY gt AUDIO gt 5 601 AKB With the option AKB the black current loop can be enabled or disabled ON enabled OFF disabled 5 6 2 TUNER With the items TUN FAO and TUN FOB the speed time constant for internal signals is set The speed can be set to normal slow or fast The tuner sub menu contains the following information For monitoring during alignment of AGC YD CL IF PLL AFW All entered data will be send directly to the video one chip values are stored in EEPROM if this sub menu is left 5 Faultfinding tree amp Repair facilities AFA AFB 5 6 3 White tone The white tone menu contains the following information MAIN WHITE TONE MENU NORMAL RED DELTA COOL RED DELTA WARM RED NORMAL TEMPERATURE SUB MENU S RED 37 GREEN 37 BLUE 39 REMARK Only one of the 3 items RED GREEN or BLUE will be display on the screen Via scrolling with the UP DOWN keys the items can be changed e NORMAL Via this menu the NORMAL colour temperature alignment can be set DELTA COOL this menu the cool colour temperature alignment can be set DELTA WARM Via this menu the normal warm temperature alignment can be set Changing any of the item
110. s red green or blue can be changed by first pressing the control left right keys to highlight the desired setting With the desired setting highlighted the user can either increment or decrement the setting by using control up down key respectively All changed data will be stored into the EEPROM after returning to the service main menu via the OK key The initial default value for all setting is 37 The factory settings of the colour temperatures are NORMAL 10500K G 37 39 DELTA 8200K R 0 254 249 WARM DELTA 14000K R 0 1 B 3 COOL DELTA COOL TEMPERATURE SUB MENU DELTA COOL RED 0 DELTA COOL GREEN 1 DELTA COOL BLUE 3 5 6 4 HSH VSL VAM VSH VX VSC EW PW CP TC SC SBL H60 V60 HSH VSL VAM VSH VX VSC EW PW CP TC SC SBL H60 V60 KR DELTA WARM TEMPERATURE SUB MENU DELTA WARM RED 0 DELTAWARM GREEN 254 DELTA WARM BLUE 249 GEOMETRY The geometry menu contains the following information Horizontal shift Vertical slope Vertical amplitude Vertical shift Vertical Zoom Vertical Scroll E W amplitude E W parabola width E W cornerparabola E W trapezium S Correction Service blanking Delta HSH for 60 Hz Delta VAM for 60 Hz 32 32 32 34 13 39 54 46 39 41 52 10 10 Into the picture geometry menu the first item will be highlighted and displayed The value can be incremented or decremented by pressing the contro
111. t RESET gt STAND BY D MAINS SUPPLY T CRT DISCHARGE CIRCUIT 1 3548 A 542 V 6543 6502 05 5545 2541 ARGE SK1 5574 1500 5 10 5574 7542 4 38 AC 2508 4 3544 2542 220V T5 AH gt pc S 6590 P11 7518 10 14V STH8NAGOF gt 12 7520 6570 MC44603AP 65 2571 P4 5573 a 140V VBATT SE A d B 16 2551 gt 1 3518 5551 3525 YY 140 VBATT P8 N 7 cl Se P13 8 5 e A mbi 2 3528 6540 p 4 9 4 3577 8V 7541 TDA8139 2563 0 6 STB 48V 2562 P14 RESET A5 19 SOUND PROCESSING SOUND AMPLIFIER STANDBY A5 26 V BATT ADJUST 140V LINE DRIVE 140V 140V 8V VBATT Sai 7225 D TDA8374C 7460 N337 BU1508DX 7461 9 40 dd a o E D 0 a 1 5457 2 4 EWCONNECTION 6160 i 11V LOT 1 2457 A A i 3479 3470 3471 2471 5470 6465 4 5463 de La A 6470 1 PROTECTION 1 8 6532010 008 eps 090398 E CRT P
112. t v13 7215 y TDA4665 7225 C EE TDA8374C 27 uil Fez 2 8 ets p B Y OUT 14 f 14 17 8 29 gt gt ai I 5 11 21 5 7225 5 5216 T pauntsc 30 1648 GY 5 2 7 UV 1336 NY Vi c 7 1015 eg E mI R Y our E 16 m x E MATRIX alas 11 SY aas 22 38 35134136 8 e gt 4 T tz fx qe bis sl ex k 7214 Boe Eq gt gt take 1 6016 Si eg eil V 2 543 9 2 RF AGC 54 4 11207 i N vi 39 25 23 18 QN ONLY FST 6015 T 7204 al 26 44 15 SDA lt gt 5 Ge 3217 1208 A BUNGO 5 16 2 f I ber f E V15a ONLY VST 1 INT 4 29 t 2 E 8 8 8 8 h h RC 8 5 8 9 9 A A5 27 BS 1 c CHROM O NTSC SW 2 9 2 id 2 m BAND SWITCH 15 lt 5 3 d H Ha EHT INFO 5 28 BS 2 c lt e GG w oum x Box lt 200V 200VA 8 5 2 ZP 8 amp 5 5 58 ra 2 z 2 2 i ig 22222 2 I 1 4 2 3 MAINS SUPPLY ei SYNC FRAME amp VERTICAL DRIVE LINE DRIVE e e e DISCHARGE CIRCUIT i 1 P1 6542 6543 A 3543 Ty 6502 05 5545 2541 CRT a I Ski 5574 DISCHARGE 10 1500 7542 E 140V AC 2508 We 38 3423 6420 6421 7420 VBATT Ts AH
113. tment Connect a pattern generator e g PM5418 and set it to white raster pattern Enter SAM by using the Dealer Service Tool or short circuit service pins M28 and M29 on PCB and switch power ON The menu will be displayed whenever SAM mode is entered Enter into WHITE TONE menu and select item NORMAL DELTAWARM or DELTACOOL only one of the three items R G or B will be displayed on the screen The initial default value setting for NORMAL is 37 The factory settings of the colour temperatures are DELTA 14000K R 0 G 254 B 249 COOL DELTA 8200K R 0 G 1 B 3 WARM 8 3 Audio adjustments 8 3 1 BTSC Sound adjustment software adjustment Set generator e g PM5418 BLACK without video pattern set audio to stereo mode carrier ON and test data to 1 RF frequency NTSC 187 25MHz with signal amplitude of 1mv and connect this signal to the aerial input Enter SAM mode by Dealer Service Tool or short circuit service pins M28 and M29 on PCB and switch power ON The menu is present whenever SAM mode is entered Enter into the AUDIO menu and select item according to factory setting Check the sound quality by the generator setting listed below The factory settings for BTSC are AUDIO AUTO gt ST NT 7 SAP NT 7 LA 7 WIDEB 19 SPECT 19 Abbriviations ST NT gt Stereo Nicam adjustment SAP NT gt Second audio program adjustment LA gt LL adjustment WIDEB gt Wideband adjustment SPECT
114. tment of this unit during repair is therefore not recommended Be careful during measurements in the high voltage section and on the picture tube Never replace modules or other components while the unit is switched on When making settings use plastic rather than metal tools This will prevent any short circuits and the danger of a circuit becoming unstable Wear safety goggles during replacement of the picture tube Notes The direct voltages and oscillograms should be measured with regard to the tuner earth or hot earth as this is called see fig 3 3 The direct voltages and oscillograms shown in the diagrams are indicative and should be measured in the Service Default Mode see chapter 8 with a colour bar signal and stereo sound L 3 kHz R 1 kHz unless stated otherwise and picture carrier at 475 25 MHz Safety instructions Maintenance instruction 3 Where necessary the oscillograms and direct voltages are measured with and without aerial signal Voltages in the power supply section are measured both for normal operation and in standby These values are indicated by means of the appropriate symbols see fig 3 3 4 The picture tube PWB has printed spark gaps Each spark gap is connected between an electrode of the picture tube and the Aquadag coating 5 The semiconductors indicated in the circuit diagram and in the parts lists are completely interchangeable per position with the semiconductors in the unit irrespe
115. to a voltage at the supply voltage V BATT of approx 108 Volts DC in normal operation and 130 Volts DC in standby After switching off the IC starts up again because of over voltage protection see slow start REMARK In case an overvoltage situation is sensed at the secondary output voltages the SMPS will go in protection in case the overvoltage situation remains present the SMPS will start slow etc this is a very good audible hick up mode Under voltage protection of the secondary voltages If the supply voltage at pin 1 lt 9 Volts DC the output pulse at pin 3 will be shut down Note The DC voltage at pin 1 is equivalent to a voltage at V BATT of approx 70V DC normal operation and the voltage at pin 1 of 7 5 Volts is equivalent to a voltage at V BATT of approx 55V DC in normal operation and 65V DC in standby In case an over voltage situation is sensed at the secondary output voltages the SMPS will first switch off the pulses and later the complete IC 7520 will be switched off In case the IC 7520 is switched off also the SMPS will switch off In case the under voltage situation remains present the SMPS will give under voltage protection like slow start etc this is a very good audible hick up mode Unload protection In case the load goes down e g the line goes down because of stand by mode or some failure in the line circuitry this will be 9 4 4 9 5 9 5 1 9 5 2 detected by 75
116. ts PAL BG SECAM DK NTSC For Bi Norma and Tri Norma sets NTSC PAL M PAL N sets with VST tuning Programme number 1 is selected and the system will be tuned at the tuning data for programme 1 read from EEPROM Forsets with PLL tuning Set is tuned to a frequency of 475 25 MHz Further settings automatic switch off no IDENT timer and the sleep timer will be ignored The child lock will be disabled f the TV sets was in hotel mode this mode will be disabled as long as the TV is in service mode Brightness saturation sharpness contrast and balance are initialised to 50 level volume is set to 25 level The TV is normally controllable All displayed text strings in service mode so SDM and SAM mode will be displayed in the English language Other features RAM test of the 21C7600 and the NV RAM 1 7620 At every start up of the TV a read after write test for the complete RAM of IC7600 and via I2C the NVRAM IC7620 will be performed If this check fails the appropriate error number will be written in the error buffer The patterns will be chosen in such a way that every bit of all bytes will be written high and low If the NVRAM is empty default values will be loaded SDM Service Default Mode This menu is being displayed whenever SDM is entered In this menu the error buffer can be inspected and the option byte s can be re programmed The overview of th
117. tus is left if the stand by command is received Downloading of tuning data with the DST Downloading of tuning data programme number frequency and system via the DST is made possible This downloading is ONLY possible in the version containing PLL tuning for Europe Blinking LED procedure Via the DIAGNOSE 1 for errorbuffer position 1 through the DIAGNOSE 5 for error 5 commands of the DST the error buffer can be made visible via the blinking LED This is useful 5 10 if the screen is not working properly The method is to use the LED pulses with as many pulses as the error number followed by atime period of 3 seconds in which the LED is off E g error code 4 will result in four times the sequence LED on for 0 25 seconds LED will be off for 0 25 seconds After this sequence the LED will be off for 3 seconds Hotel mode The L7 3 chassis has one special mode called the hotel mode In the hotel mode the following occurs Installation menu cannot be entered When entering the hotel mode the maximum volume will be the current value The set will always switch to a selectable channel when set is switched on Entering the hotel mode Select channel 38 Push the menu button on the local keyboard vol and vol and the OSD button of the RC simultaneously for seconds then you are in the hotel mode Leaving the hotel mode Same as entering the hotel mode The OSD will display the hote
118. ulti voltage Only small adaptations of some component values are needed to achieve this Degaussing R3504 is dual 2PTC s in one housing When switching on the set the PTC is cold and low ohmic This would give very high degaussing current After degaussing the PTC will be heated up and become high ohmic during normal operation the degaussing current is very low Start up and take over Start up Via the start up circuitry 3510 3530 and 3529 the voltage coming from 220V AC mains is used to start up 1C7520 via the supply pin 1 As long as pin 1 has not reached 14 5 Volts 7520 does not start up and only sinks 0 3mA If Vpin 1 reaches the 14 5 Volts 7520 will start FET 7518 will conduct and pin 1 sinks a typical supply current of about 17 mA This supply current cannot be delivered by the start up circuitry so a take over circuit must be present If no take over will take place the voltage on 1 will decrease and IC7520 will switch off in that case the restart procedure will start again Take over 7520 During start up a voltage across winding 8 9 is built up At the moment the voltage across winding 8 9 reaches approx 14 5 Volts D6540 start conducting and takes over the supply voltage Vpin 1 of 1C7520 take over current is approx 17mA Note This power supply is a SMPS Switched Mode Power Supply and not a SOPS Self Oscillating Power Supply Control circuitry see pa
119. y bi Em epis soos 0679 ol GE Omin e 9 2 1672 Lem S x 9106 lt A Geh N 8588 i 11 ei lo 9 ind 025 e H 5 e 2 79 po m o o m 2 7872 ME E 9879 0679 Lore 9272 el gt te de PT 4016 Orosi 8879 1025 V p 5879 e 5 97 55 En eh Z gra lt __5106_ GC 5 p Gers A Ir D Oy 5 Sammy o 6 x m o Ovni 1 o E T Sa E 4e Sia T oa sore 31 d n 9ozi 5 Ten om B x az ter 365 2 ko Erra kc Sy N 26 9226 MI KAS N 2 EZZ 6116 Y eil ama uw I ell e aL rS ar url SE AH LU SE X 3 8 2 A oO 461 da n wv Pw bbe SH M 4 di E SER 5 wr MSIE e NG 1 m 2975 25 5 e 07 WI RES RUE Je a 247 1226 x o Fm m Je 5 6921 SK 6224 lt 9 RE 2226 n Za velo 4 1922 E rik B c id o 20 EZA esez e 2572 ei P o hate 9 P zo 255 35 se D ER x lt 4e Ad 0929 lt E EET E 1939 74459 DS tre gt d gt 1 Core 95 a
120. y is controlled by C2531 at pin 10 of IC7520 and by R3537 at pin 16 of 7520 In standby mode the internal oscillator is about 20 kHz this frequency is controlled by R3536 at pin 15 of 107520 FET 7518 gate regulation 06514 prevents pin of 7520 of becoming negative because this will destroy the IC due to stray inductance in the gate part Circuit description new circuits The safety resistor R3525 limits the drive current to the gate of FET 7518 In a stable situation Vpin 14 is typical 2V4 9 3 13 Typical values for the 17 3 chassis Mains Voltage 90 276V multi voltage 150 276V single voltage Mains frequency 50 Hz 60 Hz Power consumption in normal mode 25 75W 10 29 90W 10 Power Consumption in stand by mode 11W 9 4 9 4 1 9 4 2 9 4 3 Protections Over voltage protection of the secondary voltages After start up the supply voltage pin 1 will be take over by positive winding 8 9 and after start up pin 1 is the measuring point for the secondary output voltage After start up via an internal switch pin 1 is internally tapped voltage divider to a voltage which can be measured at pin 6 pin 6 is alsoa measuring point for the secondary output voltages If the voltage at pin 6 gt 2 5 Volts the logic in IC 7520 will shut down the output pin 3 This 2 5 Volts threshold at pin 6 is equivalent to 16 Volts DC which is equivalent

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