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1. m NI H3MOd Overall circuit diagram Eig 2 Fig 3 2 2 2 2 1 2 2 1 1 2 2 1 2 VIDEO 21 to colour phase switches sub ref x subcarrier 13 oscillator Unit 1 2 5 MHz master oa 5502 Sub carrier line frequ lock part oscillator to main pulse generator low pass filter gps rgo ERST U control 1 1 10 V T adjusted to 5 51 0 V by 513 U1 For Service Manu MAURITRON TECHNICAL SER Vis 8 Cherry Tree Rd Chinnor Phase locked loop of master and sub carrier oscillator Ete Ea OY Tel 01844 351694 Fax 01844 352554 1 Email enquiries mauritron co uk VIDEO GENERATOR The video generator internally generates the complete CVBS signal for 13 different BL AWH and CO LOUR PATTERN These chapters are related only to the CCIR norm version G For the other versions see chapter 5 Raster signals fig 4 The high stability of the raster frequency is achieved by the phase locked loop PLL coupling of the master frequency with the sub carrier frequency fig 3 Clock frequency fig 3 The PLL circuitry compares the master frequency of 2 5 MHz with the sub carrier reference frequency in the OQ5502 1C352 on unit 10 and controls the frequency deviations of the master frequency which is set by 513 U1 So this frequency is x tal controlled as it is fixed coupled to the sub carri
2. FA For Service Manuals Contact MAURITRON TECHNICAL SERVICES 8 Cherry Tree Rd Chinnor Oxon OX9 4QY Tel 01844 351694 Fax 01844 352554 Email enquiries mauritron co uk TYPE REMARKS MR25 METAL FILM MR25 METAL FILH MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM 25 METAL FILM MR25 METAL FILM MR25 METAL FILM CARBON MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 PIETAL FILM MR25 METAL FILM MR25 METAL FILM LIN TRIMMING POTM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM LIN TRIMMING POTM MR25 METAL FILM LIN TRIMMING POTM MR25 METAL FILM NTC NTC MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM LIN TRIMMING POTM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM ITEM 834 835 836 837 838 860 84 842 843 844 845 846 847 848 849 850 8
3. 3Sanq Jo 45209 sseuqubrag a TeEUBTS 400 g a 3 TUM uzeqqed aALIHM UTX29u2 Li INOTOD Quequos TReubts 50 0 gt 20 25m Gr gt 5 gt px gt GES 559 r Tel 01844 351694 Fax 01844 352554 Email enquiries mauritron co uk 6155 Wd uDpiboip 65 Fast 350 9 J3WVNJ DNAS dWOO NO O 4399141 P H3AOd u 6 sind SING Aw 101D 1123S0 ISING Nw AS ZI AGZ A8c AS uotjpjeuob 912112 nun 1023002 2055 7 1nO 030 1491 9 1023495 jndino apniijduip uon piouab YOA Oapla 0293429 sind HM 18 bi 1no Joyonua D Jatyiydwp el 3H dH rd up 111n2412 8 5 asjnd aul ud 3a as 1911J02 E i yd s 012 101DJauab Walii pup dNM asjnd WY IU q pwosys L 7 055 00 pd 4 19452 r d 1100 20 MOA 10 0 112 0 Jat pdw p 1
4. 9 39IAH3S TVOINH931 NOH Lig VIW j981u0 sjenue N 103 ZL sanas SDJEMUO sanas t403e npou 4JHN AHA Bis jo god ZW 11 aasesyo sP ld GE 5PAPAUO 7 4 O7 Qe E E E L 8 9 7 9089 j 9089 4 90894 6692 0682 809 rpo 109 5 onpissy Pai BaL 9089 Lege I 0 die I 909 21 sz 9638 42 Leo 95 e Ly Ory S Sts 915 eo 401294402 J0 SUD JJ D puog Chuy 8S 3 UB AA RUN JHA 9089 t YOLWINGOW 719 EL 78 387 1 395 3 added connection 395 2 395 3 separated wire 26 peppe PC j vo We tra EEUU meon U 10 Unit 10 component lay out Fig 34 12 5A MASTER OSCILLATOR 894 L 1 3 2 VIDEO 12A 885 5 5 01V d 62 8 0 con Tr T ON COMPARATOR LINE INTEGRATORS 5 5A v 120P e e ee n 5A n TT LLL a P s vs oe 5 5 5 601 601 mox ed BEI Ced L I 93 zi nim a 124 e ur TTEREd 13100550
5. 356 Nic P NETS ISIN 6 193N VIDEO AMPL 358 376 38L N7 misa 00A E ld vs A gt select in test b 386 387 391 EE 0 50 100 U os E t ge al Fig 35 CHROMA AMPL N74 LS OSN 76 LS GN EE 4 NL LS SN 14 NALS WA 14 N7LLS 86A Circuit diagram Unit 10 5519 RF PRE SELECTION OUT
6. Uu w 7 m 2 eas tu FO 3 1 J Z E Mia S P2 G x shifting interference at the Burst phase 909 19 Burst amplitude 75 transitions of the patterns adjustment with 811 U10 adjustment with 811 U 10 must have equal velocity gt j lt lt G m gt E D x Hi NN NUM Kt me 24 AS 1 Tm SUR Dem ix 1 0 05 SS ES a x i i i Y 2 gt xb E Nowe Q L y pa H he us E t oT sa A ME n For Service Manuals Contact MAURITRON TECHNICAL SERVICES ss 8 Cherry Tree Rd Chinnor Oxon OX9 4QY Tel 01844 351694 Fax 01844 352554 Email enquiries mauritron co uk 4 10 EXTERNAL VIDEO e Push button VIDEO INT EXT e Feed external video signal of 1 Vpp 75 22 into connection VIDEO IN e Check external video signal according to 4 8 and 4 9 4 11 SOUND CHECK 4 11 1 Sound internal e Unlock all sound buttons e Connect oscilloscope to connection VCR pin 4 rear side e Check the 1 kHz sinewave signal for 1 50 1 Vrms at a load of 10 kQ e Connect selective voltmeter or frequency counter to TP 12 pin 6 U 2 e Select the desired sound carrier frequency by soldering the relevant joints see table e Depress button MOD e Check the carrier frequency If necessary adjust with 504 or 508 or 512 or 516 of U 2 see table 1 1 e Check the amplitude
7. gt NW QN E AY C4 e 63 69 REMARKS CERAMIC PLATE CERAMIC PLATE CERAMIC PLATE ELECTROLYTIC CERAMIC PLATE CERAMIC PLATE POLYESTER FOIL CERAMIC PLATE CERAMIC PLATE CERAMIC PLATE CERAMIC PLATS ELECTROLYTIC POLYSTYRENE FOIL POLYSTYRENE FOIL CERAMIC PLATE ELECTROLYTIC CERAMIC PLATE POLYESTER FOIL CERAMIC PLATE CERAMIC PLATE CERAMIC PLATE CERAMIC PLATE ELECTROLYTIC ELECTROLYTIC ELECTROLYTIC POLYESTER FOIL ELECTROLYTIC ELECTROLYTIC CERAMIC PLATE ELECTROLYTIC ELECTROLYTIC ELECTROLYTIC ELECTROLYTIC REMARKS CERAMIC PLATE ELECTROLYTIC CERAMIC CERAMIC CERAMIC CERAMIC CERAMIC CERAMIC CERAMIC PLATE PLATE PLATE PLATE PLATE PLATE PLATE ELECTROLYTIC CERAMIC PLATE ELECTROLYTIC CERAMIC PLATE ELECTROLYTIC CERAMIC PLATE ELCCTRDEY ATE ELECTROLYTIC CLECTROLYTIC ELECTROLYTIC POLYESTER FOIL ELECTROLYTIC CERANIC PLATE CERAMIC PLATE ELECTROLYTIC POLYESTER FOIL CERAMIC PLATE ELECTROLYTIC CERAMIC PLATE CERAMIC PLATE ELECTROLYTIC ELECTROLYTIC POLYESTER FOIL For Service Manuals Contact MAURITRON TECHNICAL SERVICES 8 Cherry Tree Rd Chinnor Oxon OX9 4QY Tel 01844 351694 Fax 01844 352554 Email enquiries 2 mauritron co uk ITEM ORDERING NUMBER OHM TOL 1 TYPE REMARKS RESISTORS UI10 601 5322 111 94146 899 1 6 IC WIRE WOUND 602 5322 116 50581 249K l MR25 METAL FILM 603 5322 116 50415 1 15K 1 MR25 METAL FILM 60
8. oui Hedas 01 9500010 sdous x40A adiAsas pa2uatiadxe 104 syeway 96 IOL 1 75079 812 CCES 203 4HM AHA 9z9 jno Ae 3uauodujo2 ec 1no e 1usuoduuoo z un iz Bid 1no Ae 13u8uoduuoo Gz Bis CaS 6 aos fis Ge Ne D fm LINDLID 1016 950 351nqu nuu g gz 6 4 18 1 pue 1018 1960 punos 2 un gz i4 weep 1102412 101 950 pc Bi 169 v 24 yn oo uonuneu s umbu mewa 96266 Xe3 76919 77810 ADV 6XO uoxO 40 9921 BED SJJAYIS TV9INHO31 NOH LIU VIN 1 09 sjenuey S9 A198S 103 182509 21 9345 a e ae lt lt J J D Zum 9 M Sow 0 106 i 2 B 4 i I E I 00 9 43 jid T IWY p A xU s 2 sh i to t E gue 1 St 1 S fX 47 l 7y azs 219 8 st I A f ZHWOS Ld 5 4 3 Ws EE i FER t HAS e 1 ASe 00 HD EN uw ccr T gz pone 4 CER ha s tt ON ks
9. spare parts Inside v Fig 22 spare parts Back view Fig 23 64 6 2 ELECTRICAL PARTS Parts not mounted on printed circuit boards Units U1 U2 U3 010 U11 are referred to in chapter 6 1 MECHANICAL PARTS MISCELLANEOUS may be altered 64K9 121K Unit 1 TRANS ISTORS U1 For Service Manuals Contact 501 3505 4822 130 44195 494 MAURITRON TECHNICAL SERVICES 8 Cherry Tree Rd Chinnor DIODES UI Oxon OX9 4QY Tel 01844 351694 Fax 01844 352554 401 404 4822 130 30664 106 Email enquiries mauritron co uk ORDERING NUMBER FARAD TOL X VOLTS REMARKS CAPACITORS UI1 501 4822 122 30043 10N 20 80 63 CERAMIC PLATE 502 4822 122 21058 15P 2 100 CERAMIC PLATE 503 5322 125 54058 Q972b5P 250 TRIMMER 50 4822 121 50576 560P l 250 POLYSTYRENE FO 505 4822 122 30093 120P 2 100 CERAMIC PLATE 506 6822 122 30043 10H 20 80 506 CERAMIC PLATE 507 4822 122 31067 SOP 2 100 CERAMIC PLATE 503 4522 122 30043 10N 20 80 63 CERAMIC PLATE 509 4822 124 20459 22MU 10 ELECTROLYTIC 510 4322 122 30103 22N 20 80 63 CERAMIC PLATE 511 4822 122 31243 82P 100 CERAMIC PLATE 512 4822 122 31054 10 2 100 CERAMIC PLATE 513 5322 125 54053 2 5092 BP 250 TRIMMER 514 5322 121 54174 680P l 250 POLYSTYRENE 515 4822 121 50533 6 2N 1 63 POLYSTYRENE FO 516 4822 122 30034 470P 2 100 CERAMIC PLATE 517 4522 122 30043 10N 20 80 63 CERAMIC PLATE 518 6822 122 31081 100P 2 CERAMIC PLATE ITEM ORDERING NUMBER OHM TOL 2
10. CROSSHATCH 1 GREYSCALE and DEFINITION LINES Push buttons CHROMA AMPL 0 96 and Connect oscilloscope with 10 1 probe to TP 10 6 U 3 Check the period time of the burst in the group of frequencies in the 1st and 5th bar 1st bar 1 25 0 05 us adjustable with 624 U 3 5th bar 0 208 0 006 us adjustable with 606 U 3 Check the period times 1st frequency group 0 300 to 0 320 us 2nd frequency group 0 322 to 0 344 us 3rd frequency group 0 349 to 0 371 us Check the amplitude for 1 9 0 1 Vpp If necessary adjust with 631 U 3 not exceeding the white level in the video signal VCR 4 8 4 8 1 4 8 1 1 4 8 1 2 4 8 2 55 COLOUR SIGNALS Chroma amplitude Adjusting the 4th bar of the BAR pattern Oscilloscope to connector VIDEO OUT Oscilloscope to trigger mode LINE Depress button BAR The 4th bar should have an amplitude which is the same as the amplitude of 75 white Adjust ment with potentiometer 823 U 10 so that B A 0 03 V VIDEO OUTPUT must be termina ted with 75 Q The 3rd bar should be on black level EQUAL LEVEL 75 WHITE N EQUAL LEVEL Fixed CHROMA AMPLITUDE Connect oscilloscope with 10 1 probe to TP 11 693 530 U 10 Pushbuttons BAR and CHROMA AMPL 100 Check signals according to the figure the amplitude pp is 100 Unlock button CHROMA AMPL 100 amplitude pp is 120 10 96 Pushbuttons CHROMA AMPL Effective chroma am
11. I 8 5 div 2 6 73yuslPAL MI I t 0 vertical 1 Tien L 21 lines 14 div 21694div J 241 5 lines 1 div 2 19334 dive comp ETE EFE sme 1st field 2nd field em j 6 57 ms 2 V 5 d Te totines A lines PE For Service Manuals Contact 7 Vi Lzs nes MAURITRON TECHNICAL SERVICES 8 Cherry Tree Rd Chinnor Fig 5 1 Pulse diagram of OQ5501 NTSC norm Oxon OX9 4QY Tel 01844 351694 Fax 01844 352554 Email enquiries mauritron co uk OQ 5501 1 div pin no 2 08 5 2 5 MHz PANAMA eee etm iere erem SSS nete RUE 13 21601 TEIL i t 0 horizontal T sss 4 line 15 9 st2us div S2yus comp blank 64us 2H 16 line sync EFE 647 comp sync 2 1 Sus 6 3 us 14 H2 t 759 100 4 dC lt I b 3 div SEE mc NN 15 VIE My r 9 div 572 5 2 24us 72ys line raster sign 3 identification t 0 vertical i 1 field blank 12 5 2015 rane biank 2875lines 12us 222985div s se rm E SENE UN lines 2 A a 7 V2 75 lines Fig 5 2 Pulse diagram of OQ5501 CCIR norm 24 2 5MHz 1 U1 16 Fig 6 2 2 3 231 2 2 3 2 blank signal LE E UTTU for at IC pin 361 4 1 10
12. 8 4 2 different status signals CIRCLE 394 6 2 3 picture MES 392 12 colour diff signal DEM 384 13 10 2 purity 313 U10 374 13 4 10 2 luminance VCR 367 4 grey scale 369 3 white circle Q b F DEM i white circle L PUR def lines L Lii control and enable signals for at IC pin 355 11 356 11 line pulse generator 379 9 checkerboard 370 5 0 VCR 100 and 50 367 8 multiburst generator 372 5 line integrator 351 U10 357 1 15 horiz centre of picture 360 14 field pulse generator 377 4 white signal RRP pulse 350 12 amp RN r 385 10 2 sync pulses and RRP pulse 380 7 5 lines v2 1 v2 Lo A 372 1 field integrator Sf sol 360 7 field pulse 3 353 6 Blanking and control signals Vertical pattern components horizontal lines bars and fields The square wave signals fig 8 are derived from the main pulse generator fig 6 The line frequency serves as clock frequency for the field pulse generator The period times of the signals are defined as multiples of the line duration Signals with period times of more than 1 line result in horizontal lines bars and fields The components for the horizontal lines and dots rows are supplied by flipflop 362 5 and 6 fig 35 Spaced by 24 line periods it is prepared by 362 9 triggered by the output of the counter 360 8 in the rhythm of 12 line periods and reset by the output of the main pulse g
13. approximatly The VIDEO EXT input is ac coupled A sync separate circuitry 535 724 725 726 and 316 separates a sync clamp pulse in order to clamp the external signal to ground by transistor 317 The external signal is buffered by transistor 318 By scaling resistors 730 and 731 the accurate signal level is fed into the summing junction 2P3 The clamped external signal is coupled by reed relay 891 and the resistor 699 to 183 The input 2P3 of the video summing amplifier has a level of 5V because of the 5V reference of pin 9 314 Within a small range this level can by varied by potmeter 714 in order to get the same level range for the two video polarities at pin 7 and pin 9 Diode 414 compensates the temperature coefficient Of the base emitter junction of transistor 315 This video summingamplifieris a differential amplifier Choosing either soldering link A or B changes the video modulation of the RF signal see 4 5 1 The differential amplifier 314 1 2 3 12 13 14 adapts the video signal to the required input range of the RF modulator The 5V reference level mentioned above is the reference level for all summing resistors too resistors for 2P3 This circuitry prevents digital spikes of the normal 5V power supply from influencing the video amplifier The video amplitude control amplifier is designed similar to the chroma amplifier The current balance of the differential amplifier 320 321 is controlled by different dc currents
14. Kjaer carrier ampl 614 U 2 400 5 mVrms to TP 12 voltmeter or 2007 ampl RF sound carr 614 U 2 712 5 10 5 dB ata freq 27 of e g 200 MHz to RF OUT sound external 1 kHz 877 U 10 40 3 KHz At at TP12 5 modulation 4 11 2 34 0 2 Vrms sine wave meter FM RF check VHF modulator 4 18 mV ampl alternation counter 32 627 for range 170 250 MHz sampling 628 for range 38 90 MHz voltmeter residual RF carrier UHF VHF 0 15 to RF OUT oscilloscope PM 3240 modulator 606 UHF 40 sampl voltmeter e g WIS WA 01 external video signal check samples onlylaccording video generator PM 5509 or 4 10 of 1 75 22 to to 4 7 4 8 4 9 PM 5519 VIDEO IN 13 1 dB at freq of e g 200 MHz to RF OUT see SGS 47 series LO 17 onwards 10 12 at 200 MHz check modul compression spectrum analyzer see SGS 47 at ca 623 MHz CTV lt 30 in total range spectrum analyzer For Service Manuals Contact MAURITRON TECHNICAL SERVICES 8 Cherry Tree Rd Chinnor Oxon OX9 4QY Tel 01844 351694 Fax 01844 352554 Email enquiries mauritron co uk 4 2 4 2 1 4 2 2 4 2 3 4 3 4 3 1 4 3 2 4 3 3 4 3 4 4 3 6 4 3 7 49 GENERAL Pushbuttons In this chapter only the indicated pushbuttons are to be pressed all others remain unlocked Tolerances Tolerances given in this chapter apply for newly adjusted instruments and may differ from those given in chapter 1 2 TECHNICAL DATA Positioning F
15. PS p 5 PSOE ME ZA ty 7 da 819 69385 P TA 425 no wee Sit 2 tz x estem En ui AL AS sjuaeuoduJoo 101 JHN JHA 514 1no Ae 1 0 t LE 514 LSZ 909 t g NUS 2 Q lt 894 95 809 ZC9 Ayddns amod 05 Bly Oz aed uo z iy eas 75901 O7 Iun 1102412 1 3 1 4H OY 4HA ze uonagjas aud 44 eui yo pue ayy 204 8 9216 ONES Bale TS n 9 i i l l U 90894 9089 4 90894 BESZ 6662 0752 5 OL i por 5 onp sey 474 s RE pem pis Td I id ist WP 1 19629 fie 5538 Lio Leos pod i ay ae cis 2K 06 Teie Tors m 5 S 829 3 zo 8 oe IAN AS ZI by ooze I Zn in 0 902 48 l 806 06 90s T TO PUOB Gmw se ui i 01 00 lr xus mj TII pony i 91 vi 5 s 1010 5 E Ur t yn oo uoguneula seuinbue wg 06266 810 X83 v69166 Fb810 0L AO 6XO UOXO JOUUIYD Py
16. and chapter 4 11 3 table 1 1 Unit 1 e Close solder joints O Q M e Open solder joints P N e Replace X tal 751 by X tal of 3 579545 MHz e If amplitude of colour carrier is not sinusoidal or is higher than prescribed Replace capacitor 507 33 pF by capacitor of 100 pF e Check adjustment according to 4 4 1 if necessary correct 4 4 2 4 8 2 and 4 9 Replace mains cable by the standard American mains cable Add suffix MM to the type plate at the rear side ORDERING NUMBERS FOR THE PARTS MENTIONED ABOVE unit pos ordering number value tol item 10 580 5322 121 44137 68 nF 10 polyester foil 10 660 5322 116 54743 301 kOhm 1 metal film 10 838 5322 116 50592 442 Ohm 1 metal film 10 840 5322 116 50592 442 Ohm 1 metal film O 798 5322 116 54012 6 81 kOhm 1 metal film 2 613 5322 116 54651 26 1 kOhm 1 metal film 1 507 4822 122 31081 100 pF 2 ceramic plate 1 751 4822 242 70323 4 433619 MHz X tal G I 1 751 5322 242 70437 3 582056 MHz X tal N 1 751 5322 242 74083 3 575611 MHz X tal M 1 751 4822 242 70105 3 579545 MHz X tal MM 5322 321 14021 Stand American mains cable 5322 401 14038 mains cable cleat 61 6 PARTS LIST PM 5 5 1 9 MECHANICAL PARTS MISCELLANEOUS Item Quantity Order number Description 1 1 5322 447 94324 Cover grey 1 1 5322 447 90395 Cover brown 2 4 5322 462 44174 Foot bottom side grey 2 4 5322 462 10222 Foot bottom side brown 3 2 5322 520 34164 Bearing bus
17. not exist any conversion kit to change to these versions More detailed information is given by the following Service Information sheets PM 5519GS cable TV 20 9499 528 03011 S channels SGS 25 9499 528 O3202 PM 5519GX stereo two channel SGS 3O 9499 528 03411 PM 5519D China Korea SGS 31 9499 528 O3511 PM 5519G into PM 5519I Unit 10 e Close solder joint I e Open solder joint H e Check and if necessary correct vision to sound distance according to chapter 4 11 1 and chapter 4 11 3 table 1 1 Add suffix I to the type plate at the rear side PM 5519G into PM 5519N Unit 10 e Close solder joint K e Replace capacitor 580 47 nF by capacitor of 68 nF e Replace resistor 838 316 Ohm by resistor of 442 Ohm e Replace resistor 840 357 Ohm by resistor of 442 Ohm e Replace resistor 613 02 38 3K by a resistor of 26 1 kOhm e Check and if necessary correct vision to sound distance according to chapter 4 11 1 and chapter 4 11 3 table 1 1 Unit 1 e Close solder joint O e Replace X tal pos 751 by X tal of 3 582056 MHz e If amplitude of colour carrier is not sinusoidal or is higher than prescribed Replace capacitor 507 33 pF by capacitor of 100 pF e Check adjustment according to 4 4 1 if necessary correct 4 4 2 4 8 2 and 4 9 Add suffix N to type plate at the rear side PM 5519G into PM 5519M Unit 10O e Close solder joint K e Replace capacitor 580 47 nF by capacitor of 68 nF e Replac
18. 167 O 33 Cyan 0 53 283 0 47 Green 0 44 241 O 44 Magenta 0 31 O 44 Red 0 23 103 O 47 Blue 0 08 347 O 33 Black O performance details of various versions PM 5519 TV standard Lines per picture frame Field frequency Hz Line frequency Hz Chrominance sub carrier MHz Sound carrier Vision carrier MHz Sound modulation Pre emphasis us G E N CCIR PAL CCIR PAL CCI R PAL RTMA PAL 50 50 50 60 6 15625 yis 15625 15734 15734 4 433618 waww m m m M MM RTMA NTSC 4 433618 3 582056 3 575611 3 579545 50 10 175 75 12 3 Video Part Video carrier Frequency ranges Range and frequency selection Indicator RF output Impedance Output voltage Attenuator Video modulation Video outputs Connector 1 Coupling Connector 2 Coupling Impedance Nominal voltage Polarity Video input Impedance Nominal voltage Polarity Max permissible external voltage 38 90 Mhz IF and band 170 250 MHz band T TI T 470 820 MHz bands IV and V 6 tip touch button to select the preset channel frequency of range and channel for each tip touch button BNC connector front panel 752 gt 10 mVpp synchronizing level continuously gt 60dB AM negative or positive selectable by solder link modulation will take place on IF This modulated signal 1s then mixed up on RF Internal or external modulation selectable
19. SUBCARRER LINEFREQUENCY MAIN PULSE GENERATOR 885 50 DEF LINE S 885 10b BAR Q D VCR BBS 9b MULTIBURST PULSE GENERATION PART Q DEM 885 8 e PUR 883 7b oF DEF 885 5b LINES 2 5 5 5 550 551 ul 70P 6 100P N 1 Ju RRP GENERATION PART 885 120 RRP 7 TRIGGER COMP SYNC nm Ir FF 4 5 5 5 5 5 5 5 T 601 501 __ 01 i Re E d 520 508 s wn Be S wh LE 9 5204 OTT HE i i 502 Ba 79 313 8 Fa 21503 965 FAI um um 602 501 ae mp 212 8C5588 679 58 mg 12A 16 d b Je lt IS 502 is Ly 35 oas 13 13100 550 E T A 8 C 7 BM E 10 1 SUBCARRIER LINEFREQUE NCY LOCK PART MAIN PULSE _ SS PART 10 1 BAR 885 10b l VCR 885 9b lcs MULTIBURST PULSE DEM 885 85 GENERATION PART lt oj PUR 881 7 1 of lt DEF 885 5b 3 755 683 550 55 ul 170 g 700P egi 3 Ep I gt 885 120 885 9o RRP VCR RRP GENERATION PART e 794 gt Ee sas ars a a w r r IRIGGER COMP SYNC 1 Ao 43 7
20. X 6 Z9S UOTRZeIANAES Teubts SnsSJ9A AeTeg go 3rn241T1O XTIJEN m u rS5s 4102212 UT Wd G APC InOTOS zstrAzreoqns uor3eJ3n43 S 6 sang n uzaqqed ANOTOD a 931UM UWA ANOIOD A OOL 93TUM 1 02 10 Y3TA peutquoo ZHW Z t ZHW O t ZHW 8 Z u3pPTA puPgH s urT U3TA peurquoo A W uoraeIznaes jo sd qs 8 TeUBTS oSPOJTP j3S lt 010 AQTATRTSUSeS a a daqs Q93TAS amp 5 8 aseyd Aouenbezy 1 11 qns SzojZeTRpowep g BurpoSu Tetoeds 5 TPeEOT3ZI A 5 pue opn4j r due Vd wad pesy Jo 2 lt 11 euozyS pue punos 32 1 ocu z jaz qurI G antq pue ueedb pay Karana a uzeqzed ALINANA 3ueiino
21. by means of push button for VCR rear panel DC mean value 1 8 V BNC socket front panel AC 75 87 l Vpp into a load of 75R fixed position of VIDEO AMPL control O 1 5 Vpp continuously adjustable into a load of 752 positive BNC connector front panel 75 9 1 Vpp positive 5 V 1 2 4 Sound part Sound carrier Frequency Tolerance Sound modulation Internal signal FM sweep AM modulation depth External signal Bandwidth Preemphasis Sound input Input impedance Max permissible voltage Sound selector Sync part Line frequency Tolerance Line sync signal Lines field Field frequency Field sync signal RRP Receiver Recogni tion Pulse Sync outputs Output signal Output voltage Impedance Polarity Coupling Max permissible ext voltage 4 5 5 5 6 0 6 5 MHz selectable by solder links on delivery adjusted to standard value 0 2 920 FM or AM selectable by solder link KHz sine wave 40 5 kHz with 5 5 MHz slightly different with other carrier frequencies 304 5 0 2 Vrmsresults in the same modulation depth as for Internal signal 100 Hz 10 KHz 50 us can be interrupted DIN connector rear panel 0 5 9 40 V carrier ON OFF modulation ON OFF modulation 1 kHz external 15625 Hz or 15734 Hz adjusted to standard value 0 05 according to standards CCIR and RIMA 312 5 lines for f line 1562
22. i EE The colour carrier is X tal stabilized The colour carrier is the reference frequency for the line master frequency phase locked loop circuitry see 2 2 1 and the source for the colour modulators and the colour sync signal 12V 12V Fig 14 Generation of the colour sync signal 2 2 7 2 Colour sync signal burst fig 14 The burst is generated by activation of the colour modulators with the burst key signal during blanking time The burst includes 10 sine wave periods with alternating phase angle of 1359 and 225 1809 45 from line to line 39 odd 15 and 2nd field even line 3rd and 4th field even line 1st and 2nd field odd line 3rd and 4th field green R Y For Service Manuals Contact MAURITRON TECHNICAL SERVICES h Tree Rd Chinnor Fig 15 Phase diagram of the primary and complementary Be HA OX9 4QY Tel 01844 351694 Fax 01844 352554 colours and of the colour sync signals Emaii enquiries mauritron co uk 12V 12V 12 12V 9 Xss 763 xm e 2 3 Fig 16 Colour bar matrix control signal and modulator input 36 2 2 4 3 Fig 17 2 2 7 4 RGB signals fig 17 The basic relationship between the luminance Y and the 3 primary colours red R green G and blue B is given by the following definition Y 0 3 R 0 59 G 0 11 B The colour bar pattern consists of these 3 primary colours the 3 complementary col
23. pattern components Field pulse generation components Control signals for multiburst oscillator Forming the circle control pulse Forming the circle Digital addition of the BL WH pattern Summing and scale factor of patterns and signals Greyscale generation Generation of the colour sync signal Phase diagram of the primary and complementarv colours and of the colour sync signals Colour bar matrix control signal and modulator input Synthesis of the Y R Y and B Y signals out of the RGB components Colour difference modulators and phase switches of the colour carrier frequencies Matrix of the monochrome pattern red green and blue Control of the colour modulator for DEM and VCR Control of the PAL and DEM phase switches Front view spare parts Inside view spare parts Back view spare parts Unit 1 master oscillator circuit diagram Unit 1 component lay out Unit 2 sound oscillator and modulator circuit diagram Unit 2 component lay out Unit 3 multiburst oscillator circuit diagram Unit 3 component lay out Unit 11 power supply circuit diagram Unit 11 component lay out VHF UHF modulator circuit diagram VHF UHF modulator components Unit 10 component lay out Unit 10 circuit diagram 18 20 21 22 23 23 24 25 25 27 29 29 31 32 33 34 35 35 36 37 38 39 40 62 63 63 76 76 76 76 76 76 77 77 77 77 78 79 GENERAL INFORMATION 1 1 INTRODUCTION The multi system CTV Pat
24. z Ej i12 ES 632 51371 2 VCR pressed 20ms 312 5 lines 2 T 2 634 302 636 303 i15 633 301 i 16 368 11 2 8MHz 1 NR PM 3 dedu uM 8 V T s m ou ivi gt 6 V start multiburst stop oscillator for VCR 368 6 Fig 9 Control signals for multiburst oscillator For Service Manuals MAURITRON TECHNICAL 8 Cherry Tree Rd Chinnor Oxon OX9 4QY Tel 01 844 351694 Fax 01844 352554 Email enquiries mauritron co uk N N E 2 gt dc gt 28MHz 38 MHz 4 8 MHz 12 412V 12V 28 2 2 5 202 921 2 2 92 2 2 5 3 Circle components fig 35 The circle is composed by two pulses which at the intersection line circle are two times actuated by the comparator during the active line time With increasing number of lines in the upper part of the frame e g the distance between two pulses is automatically augmented with respect to the central row Double integration by the line and field integrators fig 10 1 and 10 2 304 306 and 307 308 causes parabola in line and picture deflection The control is organized by the enable signals H level 351 1 and 351 7 via the gates 372 6 and 372 3 These gates are disabled if the CIRCLE pushbutton is not pressed The addition is achieved via resistors 663 665 The ellipticity is adjusted by potmeter 664 fig 10 1
25. 01 702 703 704 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 tel Pee 72 724 725 726 Tel 728 729 730 231 732 735 734 735 7 36 737 738 759 737 738 739 741 742 744 746 747 748 749 750 751 752 753 75 755 ORDERING HUMBER 5322 5322 5322 5322 5122 5322 532 5322 5322 5322 5322 5322 532 e 5522 5322 5322 5322 5322 5322 5322 5522 5322 5322 5322 5322 5322 5322 5322 5322 5322 5322 5322 5322 822 5322 5322 5322 5322 5322 5322 5322 S322 93202 5322 5522 5322 3382 5322 3522 5322 5322 2322 5322 5322 5522 5322 5322 5322 5322 5322 5322 3322 236 4822 3362 5322 5322 2222 5322 9222 2322 5522 116 116 116 116 111 116 116 116 116 116 116 116 116 116 116 116 16 116 116 116 116 116 116 116 d ON f A i F w 0 gt 2 O G Ea 4 On 116 or fond i m ON 0 0 ROHAN 116 116 116 116 116 116 116 116 116 116 1 16 116 116 116 116 116 116 116 54549 50863 54617 56595 94146 54668 50474 54644 545712 50666 50726 50474 54558 55613 50452 54694 54736 54668 54558 5454 54603 50583 54442 54545 54538 54606 5052 54
26. 030 942 5 bajj 203011250 ZH punos indui 1n0 02 spud 0 03 18311jD2qns E AWOL AOL 330 0 1X3 NO NO ZHMI NI INI Yvo GOW GNNOS INOIIL2313S 3Nd 030 IO3GIA VNO3SHO NHd31lIVd NYSLIVd 230 300705 WVHDVIC X90389 31dI9NIBd DNIJLVH3dO 81 81 2 1 2 1 1 2 1 4 CIRCUIT DESCRIPTION GENERAL The generation of the pattern sound and raster signals is based on the synthesis of digital signals The digital signals in the pictures are shown idealised The numeric values used in the description apply to the G and l version see table 1 1 2 Modification into the versions N M and MM see chapter 5 Explanation of symbols in the circuit diagram and the descriptions fu is field frequency 50 or 60 Hz is field time 2 20 or 16 67 ms V 312 5 262 5 lines Vv is line frequency 2 15625 or 15734 Hz t is line time 2 64 or 63 56 us S H see fig 4 div is the smallest time component for the synthesis of the raster and pattern signals Component numbering Numbers until 100 indicate mechanical parts miscellaneous and units Numbers starting with indicate transistors and IC s Numbers starting with a 4 indicate diodes Numbers starting with a 5 indicate capacitors Numbers starting with a 6 indicate resi
27. 1 c2z8v 125 ynoo uoauneud yseuinbue e1e d 00 c d ZZ 59016 ZZL 2289 ozs SSCSE PP8 10 X J r691S F810 JOL aenga 21u49197 091 d SLO dS i 6009 ZZL 2255 216 1ejd 2 L d Oi vPSOLE ZZL 8 915 6XO uoXO mejd stuga 52 0 dV SPOLE 221 515 JOULIYD 3911 8 Id 001 d INHO3L 9191d 218192 00 c d 22 90L1 221 25 5 S30IAd3S W PI JO 311825 d 01 vSOLE ZCITT CB8U 16 PROD sjenuey 89 A18S 103 1e d 21 001 z d p ZLOLE 221 2287 215 249222 e d 66 6901 221 ZZ8t Lis engm 091 450 d l 600 221 2256 015 seingm 2106282 09 d SZ O do z 1 09 221 2256 60S 4 QA eiejd 21084182 co d SZ O d 89 0 LLPOV ZZ L CCES 806 dn eyeid 21159487 00 492 0 d Z BEOLE 221 ZC8t 806 91810 9 08 02 N 0 2005 221 2286 205 spaemuo L OF deo 0 NO L 86615 221 ZZES 905 O1 dn 2144225 00L OZ d OZ8 6vOvt 221 2256 905 59 08 O 200 221 228 SOS 06 9 08 02 N zz 50105 ZZi ZZ8v 809 spsemuo gt L OF des dius 59 ot NOI 866 221 ZZES 2509 LOS L QJ dn 93614 0 001 0 028 GVOVE cct ZZES 205 LOS sioqioedey 5 18 SHOA 96 124 Jequinu unapo 8 sor 88 5
28. 2 100 10021 607 5322 116 50508 608 322 116 54567 610 5322 116 50635 611 5322 116 55623 612 5322 116 54469 613 5322 116 54641 61 5322 116 54494 615 5322 116 50676 515 5322 116 50654 617 5322 116 55539 6 58 5322 116 54603 619 55902 116 54623 621 5322 118 54469 621 5322 116 5464 622 5322 116 50635 624 4522 120 10924 625 5322 116 54469 626 5322 115 50729 627 628 5322 116 54469 62 5322 116 55505 630 5522 116 54508 63 4822 100 10073 633 4822 116 51233 6 14 5322 116 55516 635 5322 ll6 54506 636 5322 116 50729 2 Unit 10 ORDERING NUMBER TRANSISTOR UI10 3501 303 4822 130 44121 304 310 G822 130 44196 311 313 4822 130 44197 315 822 130 44257 316 4822 130 44256 317 4822 130 44121 318 4822 130 44195 319 4822 130 40938 320 321 5322 130 44847 320 321 4822 130 44195 322 5322 130 44349 325 329 4822 130 44196 330 4822 130 0938 BC333 BC548C 8C553B 5 7 BC557 BC338 BC568C BC548 BC548C BF494 BC635 BC548C BC548 see SGS 47 selected serie 06 gt serie 06 REMARKS METAL METAL METAL METAL METAL TRIMMING POTM METAL METAL METAL METAL METAL METAL METAL METAL METAL METAL METAL METAL METAL METAL METAL FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM 67 TRIMMING POTMETER METAL FILM METAL FILM METAL FILM METAL FILM METAL FILM TRIMMING POTM METAL FILM METAL FILM METAL FILM METAL FILM 68 ITE
29. 25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM Hz 25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 FILM R25 METAL FILM MR25 METAL FILM HR25 METAL FILM MRZ5 METAL FILM MR25 METAL FILM R25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM R25 METAL FILM HR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM nR25 METAL FILM MR25 METAL FILM MR25 METAL FILM MR25 METAL FILM LIN TRIMMING POTM MR25 METAL FILM MR25 METAL FILM For Service Manuals Contact MAURITRON TECHNICAL SERVICES 8 Cherry Tree Rd Chinnor Oxon OX9 4QY Tel 01844 351694 Fax 01844 352554 Email enquiries mauritron co uk 73 74 6 245 ITEM Unit 11 INTEGRATED CIRC U11 130 209 209 209 130 130 ORDERING NUMBER 30959 85605 85726 85535 30833 32031 ORDERING NUMBER 124 2 122 124 124 122 12 124 122 2 124 122 20501 20537 39128 20494 290529 30103 29468 20529 30103 29468 24084 20103 206561 ORDERING NUMBER 35 4822 352 5322 353 5322 354 5322 DIODES UII 401 402 6822 403 404 5322 ITEM CAPACITORS U1I1 505 4822 506 4822 507 6822 508 4222 509 4822 510 511 4822 513 4822 514 4822 DIS 5IT 4822 518 4822 519 5322 520 6822 522 6822 ITEH RESISTORSZU11 601 5322 602 5322 605 5322 605 5322 606
30. 322 5322 5322 5322 5322 5322 5322 5322 5322 5322 5322 5322 5322 5322 4822 5322 5322 5322 5322 5322 5322 5322 4822 5322 4822 5322 5322 5322 5322 5322 5322 5322 5322 5322 5322 5322 4822 5322 5322 5322 5322 5322 5322 5322 5322 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 110 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 ll 116 116 116 100 116 116 116 116 116 116 116 100 116 100 116 116 116 116 116 116 116 116 116 116 116 100 116 116 116 116 116 116 116 116 50731 54587 54011 50559 54192 50664 54001 50664 54625 50583 50664 54679 50872 54641 50664 54655 63187 54595 54686 54655 54686 54538 50726 54637 54643 54655 54538 50904 50509 54606 50524 54549 50583 54549 50586 50571 56536 54626 54549 10051 54538 54536 50904 50509 54606 54624 54557 10051 54536 10038 50583 34014 54442 54617 50608 54494 50524 50479 50567 54587 54619 10035 54442 54603 54571 54529 54554 50586 50925 50509 OHM 51 1 9 53K 6 19K 187 3 01K 15 4K 95 3K 3 65K 10K 10K 51 1 6 69K 1 96K 619 1 1K 1 54K 15 4 4 87K t bet pu et e i et m ed ed de i I ed di feet de pe pes TOL X E eS E ft
31. 40 to 70 C transportation This generator conforms to VDE 0411 class I protective earth connection Dimensions over all Height 140 mm Width 305 mm Depth 300 mm Weight approx 4 5 kg ACCESSORIES Supplied with the instrument IM 9538 Connection Cable BNC IV connector 75 Ohm Operating manual Optional IM 9539 Connection Cable BNC lt impedance transformer 75 300 Ohm IM 9075 Connection Cable BNC BNC 75 Ohm Service manual 16 1 4 SURVEY OF PATTERN Signal content CIRCLE White circle on grey background Black circle on white background circle and white CHECKERBOARD 6x8 B W squares DOTS 11 horizontal lines of 15 dots CROSSHATCH 11 horizontal and 15 vertical lines GREYSCALE and DEFINITION LINES Staircase signal white with 8 identical steps combined with Definition lines O 8 4 8 MHz stepwidth 1MHz B W Colour VCR For checking Overall linearity Overall geometry Reflections Focus adjustment HOR Vert sync HOR Vert linearity HOR Vert deflection Amplitude aspect ra tio geometry ringing Bandwidth by observa tion of vert transi tions Mains hum interferen ce in synchronization Black white transi tions Static convergency Dynamic convergency Pincushion correction E W N S corrections in 110 CTV receivers Brightness and con trast circuit Greyscale Linearity of video amplifier Video bandwidth ZH
32. 442 54469 54547 54442 50581 54567 10838 50479 54637 54442 545459 50581 54617 55571 54615 54459 54734 50677 54538 54558 54683 50524 50586 50581 50729 56519 50671 50635 50672 54721 54704 54689 54714 54698 50567 50556 51105 56559 54442 45 10 54624 50542 50556 55587 54595 2 1 un OHM 7 15K We O9 3 IM A gt AA 68 1K 3 01K 1 546K 249K 4 22K 602 2 61K 1 47K 5 152 178K 121K 82 5K 154K 105K 95K3 4 652K 670 75 51451 4 02K 8 66 11 5K 68 7K 4 42K 5 36K 5 11K TOL 1 BEES dE E 6 be lt i e kA eA ed eT a F ER ER d d ig d pM EA i 4 bw B A B ES TYPE MR25 nR25 25 MRES Iu MR25 25 MR25 MR25S 25 MR2 25 ta R25 PR29 629 25 MR25 5 1225 MR25 R25 1925 nR25 HR25 MR25 MRZ5 d eo 25 MR25 MR25 MR25 225 LIN MR25 RED MR25 25 MR25 Mts R25 25 MR25 1829 MR25 25 25 25 MR25 MR25 52 9 MR25 NR25 R25 MR25 MR2 PR25 MR25 MR25 MR25 MR25 NR25 MR2 nR25 MRZD MR25 MR25 KRE 829 125 5 METAL METAL HETAL METAL FILM FILM FILM FILM RES METAL METAL METAL METAL METAL METAL METAL METAL METAL METAL METAL M
33. 5 MODULATION AND SYNCHRONISATION FREQUENCY AND PULSES Sub carrier frequency e Connect a frequency counter to test point 5 TP 5 pin 11 U 1 e Check the sub carrier frequency PAL 1 4 433619 MHz PAL N 3 582056 MHz L 5 Hz PAL M 3 575611 MHz NTSC 3 579545MHz If necessary readjust with capacitor 503 U 1 Sub carrier amplitude see also SGS 47 e Connect oscilloscope with 10 1 probe to TP 5 pin 11 U 1 e Check the sub carrier amplitude 2 6 Vpp 0 2 V e necessary readjust with 606 0 1 max lt 470 Master oscillator control voltage e Connect a digital multimeter to TP 6 17 U 1 e Check that the voltage is between 5 4 and 5 6 V f necessary readjust with capacitor 513 U 1 Check duty cycle at pin 16 U1 to 0 45 0 55 if necessary correct by alter resistor 612 U1 to 64 9 K 121 K and capacitor 510 U1 to 22N Line frequency e Connect a frequency counter to TP 7 pin 11 integrated circuit 351 U 10 e Check the line frequency 1 15625 Hz 2 Hz NTSC PALM 15734 Hz 2 Hz Field frequency e Connect a frequency counter to TRIGGER FRAME e Check the period time 0 2 ms for line f H 20 0 2 ms for line frequency 15625 Hz For Service Manuals Contact 16 7 0 2 ms for line frequency 16734 Hz MAURITRON TECHNICAL SERVICES 8 Cherry Tree Rd Chinnor T Oxon OX9 4QY ine pulses Tel 01844 351694 Fax 01844 352554 Email enquiries mauritron co uk e Connec
34. 51 852 853 854 855 856 857 58 859 860 861 869 863 866 865 866 867 868 869 870 871 872 873 87 875 876 877 878 880 ITEM COILS U10 888 889 890 ORDERING NUMBER 5322 5322 5322 5322 5322 5322 5522 5322 5322 5322 5322 5322 5322 5322 5322 5322 5322 5322 5522 5322 5322 5322 5322 2224 2266 5322 5322 5322 95202 5322 5322 5322 5322 5322 5322 5322 4822 5322 5322 ORDERING NUMBER 5322 158 10329 5522 158 14004 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 100 116 116 56606 54469 54005 54469 54511 50603 54469 54606 50509 50325 54554 50586 54529 54571 54005 54469 54442 50728 54643 50608 54694 54643 54632 50622 54549 50555 54442 54619 54665 55258 50557 54619 55635 54552 50484 54643 54549 10079 54442 54466 OHM 7 15K 100 332K 100 316 3247 100 7 15K amp 87K 15 4 1 1K 1 54 619 1 96K 3 32K 100 51 1 1 87K 20 5K 6 19K 90 9K 20 5K 14 7K 1 58K 1 27K 51 1 10K 40 2K 511K 46 4K LOK 16 9K 1 05K 4 64K 20 5K 47K 51 1 20 9 TOL X Re RA pU i F TYPEZDESCRIPTION 2 2 MUH COIL 15MUH COIL TIPE REMARKS MR25 METAL FILM MR25 METAL FILM MR
35. 5283 402K l MR25 METAL FILM 646 5322 116 54549 IK l MR25 METAL FILM 647 5322 116 50636 2 14K l MR25 METAL FILM 648 5322 116 54608 7K5 1 MR 25 METAL FILM 649 5322 116 54714 154K 1 MR25 METAL FILM 650 5322 116 50608 6 19K 1 MR25 METAL FILM 651 5322 116 50451 21 5K 1 MR25 METAL FILM 652 5322 116 9542 9 115K 1 MR25 METAL FILM 653 5322 116 50608 6 19K l MR25 METAL FILM 654 5322 116 50656 2 74K 1 MR25 METAL FILM 655 5322 116 55009 562 1 MR25 METAL FILM 656 5322 116 55503 6 49K l MR25 METAL FILM 657 5322 116 34 732 237K l MR25 METAL FILM 658 5322 116 54011 5 62K 1 MR25 METAL FILH 659 5322 116 55683 68 1K 1 MR25 METAL FILM 660 5322 116 59252 e37K 1 MR25 METAL FILM 661 5322 116 50608 6 19K 1 MR25 METAL FILM 662 663 5322 116 50484 4 64 1 MR25 METAL FILM 664 6822 100 10036 4 7K LIN TRIMMING POTM 665 5322 116 50586 1 54K 1 MR25 METAL FILM 666 5322 116 54576 2 37K 1 MR25 METAL FILM 667 668 5322 116 54552 1 05K 1 MR25 METAL FILH 669 5322 116 545497 IK 1 MR25 METAL FILH 670 5322 116 54595 5 11K 1 MR25 METAL FILH 671 4822 100 10029 2 2K LIN TRIMMING POTM 672 5322 116 545619 10K 1 MR25 METAL FILM 673 5322 116 54643 20 5K 1 MR25 METAL FILM 674 5322 116 50586 1 54K 1 MR25 METAL FILM 675 5322 116 54595 5 11K 1 MR25 METAL FILM 676 4822 110 63201 3 3M 10 CARBON 677 4822 110 65189 1 2M 10 CARBON ITEM 678 680 705 740 743 745 679 681 682 683 684 685 686 687 683 659 690 691 692 693 694 695 696 697 698 699 700 7
36. 5322 607 608 5322 609 5322 610 5322 611 5322 612 5322 116 116 116 116 116 116 116 116 116 116 50484 54442 50555 59326 523578 50452 50578 50926 54554 54417 TYPE DESCRIPTION ZTK33B 7812CU 21261 7805CU BY206 RECTIFIER SKB2 08L5A FARAD 47MU 2201410 6 7N 6 7MU 100 0FU 22H 3 3MY 1002MU ech S3MU lt lt 00 amp MU 4 66K 51 1 1 27K 40 2 20 5 10 20 5 40 2 1 7 5 20 80 20 80 20 80 TOL I 4 B L2 p We VOLTS TYPE MR25 R25 MR25 MR25 MR25 MR25 MR25 MR25 MR25 MR25 REMARKS ELECTROLYTIC ELECTROLYTIC CERAMIC PLATE ELECTROLYTIC ELECTROLYTIC CERAMIC PLATE ELECTROLYTIC ELECTROLYTIC CERAMIC PLATE ELECTROLYTIC ELECTROLYTIC CERAMIC PLATE ELECTROLYTIC REMARKS METAL FILM METAL FILM METAL FILM METAL FILH METAL TEILE METAL FILM METAL FILM METAL FILM METAL FILM ETAL FILM SZ wu OW SZ HIN L gt c SOOPS 911 2255 09 unod 6unuunuuoqie2 600 oz 22 62001 001 ZZ8t 909 uni SZ HIN i gt 52 8 85575 911 5255 S09 IBEW SZ HIN L amp 0075 911 2255 809 IRB SZ HW L x SZ 8 8SStS 911 ZCES 09 3501 L QA uA IReW SZ HW L v9 v v8vOS 911 2255 209 9L HdS S 95 60905 225 03 510251599 5 d L 95 IO L uuo 1 quinu 8 8010 spuemuo 44 aie d 31ue 182 00 c d 65 690 22
37. 5322 116 50581 2 4SK l MR25 METAL FILM 605 4822 116 30122 330 5 NTC 25 NTC 606 5322 116 54525 211 l MR25 METAL FILM 607 5322 116 50451 21 5K 1 MR25 METAL FILM 608 5322 116 51052 42 2 1 MR25 METAL FILH 609 5322 116 54595 5 11K 1 MR25 METAL FILM 610 5322 116 504884 4 64K 1 MR25 METAL FILM 611 5322 116 54525 SEL l MR25 METAL FILM 612 5322 116 54619 10K 1 MR25 METAL FILH 613 5322 116 50451 21 5K 1 MR25 METAL FILM 616 5322 116 50664 2 05K 1 MR25 METAL FILM 615 4822 116 50122 330 5 WTC NTC 616 617 5322 116 54595 5 11 1 MR25 METAL FILM 619 5322 116 54446 56 2 1 25 METAL FILM 620 5322 116 50664 2 05K 1 MR25 METAL FILM 621 5322 116 50451 21 5K l MR25 METAL FILM 622 5322 116 54595 5 11K 1 MR25 METAL FILM 623 5322 116 50572 12 1K 1 MR25 METAL FILM 626 5322 116 50672 51 1K l MR25 METAL FILM 625 5322 116 50726 36 5K l MR25 METAL FILM 626 5322 116 54595 5 11K l MR25 METAL FILM 628 5322 116 54303 6 49K 1 MR25 METAL FILM 629 5322 116 54608 7 5K 1 MR25 METAL FILM 630 5322 116 54741 287K 1 MR25 METAL FILM 631 5322 116 50458 7 87K 1 MR25 METAL FILM 6 32 5322 116 54619 10K 1 MR25 METAL FILM 633 5322 116 56005 3 32K 1 MR25 METAL FILM 634 5322 116 35332 3 09K 0 1 METAL FILM 635 5322 116 54698 105K 1 MR25 METAL FILM ITEM ORDERING HUMBER OHM TOL X TYPE REMARKS 636 5322 116 50414 2 87K 1 MR25 METAL FILM 637 639 5322 116 54595 5 11 1 MR25 METAL FILM 650 5322 116 54741 287K H MR25 METAL FILM 641 644 5322 116 54595 5 11K 1 MR25 METAL FILM 645 5322 116 5
38. 5Hz or 262 5 lines for f line 15734 Hz 50Hz for f line 15625Hzor 60 H for f 15734 H line according to standards with preequalizing and postequalizing pulses VCR identification In the synchronous pulse selectable with button on front panel 2 BNC connectors front panel 1 COMP SYNC 2 FRAME 24V 15 KR negative DC digital level 5 V and 1 V 642296 1 32 06 20 7 I 122529 ps Chroma part Systems PAL according to IV systems or M NTSC delivered according to standards Subcarrier frequency 4 433 619 MEZ for PAL G and I 3 582 056 MHZ for PAL N 3 575 611 for PAL M 3 579 545 MEZ for NISC Tolerance 5 10 5 4 0 Burst according to standards contained in all test patterns 5 Burst phase 135 and 225 for PAL 180 for NTSC Amplitude burst and chroma amplitude adjustable in steps Attenuation 25 50 75 100 selected by seperate or combined push buttons O Tolerance of chroma angle 3 Power supply Mains voltage 110 V 127 V 220 V 240 V externally switched over Tolerance 10 Mains frequency 50 Hz 60 Hz Tolerance 5 For Service Manuals Contact Power consumption 18 Watt MAURITRONTECHNICAL SERVICES 8 Cherry Tree Rd Chinnor TE Oxon OX9 4QY Environmental conditions Tel 01844 351694 Fax 01844 352554 Email enquiries mauritron w uk O Reference temperature 23 Nominal operating 5 to 40 C temperature 5 Limits For storage and
39. 687 U10 379 6 381 8 and 378 3 resulting in a white circle on a black field Pushbutton circle and WHITE The NAND gate 377 6 is activated thus switching the summing junction gt 2 to high during the active line period by the pulse sequence 1f via 378 6 The circle pulses 313 C pass gates 379 12 and 378 3 as 378 1 has high level because of inhibited gate 381 The circle pulses interrupt the high level of 202 So a white field with a black circle is generated Pushbuttons circle BL WH The gates 381 and 378 3 are combining the circle pulses with all test pattern signals generated in this section fig 11 In the white squares of the checkerboard circle pulses 312 C are engraved by 379 6 pulse width 312 C being larger than 313 C In this engraved black circle the white circle 313 C is added by 379 12 and 378 2 387 3 387 1 11 fy E E 351 16 V fH Df 351 1 5 fH 361 6 1 IIIS 5 v 382 5 20fy 365 6 362 6 3121 C see fig 10 313 C see fig 5 354 89 F 354 11 1 325 1 2 V V 325 364 6 V f Ero 353 4 2 1 V 32 pee n 364 7 Ay sv sev 13 T 354 8 366 4 Er V 325 329 xus r 367 3 325 325 367 10 pu LPI 5 RN DEM 101328 13 353 12 111353 10 7 350 350 5 gt Sa 3 11 For Service Ma
40. 71 TYPE REMARKS RESISTORS 01 601 602 5322 116 50872 61 9K l MR25 METAL FILM 603 5322 116 50508 437 1 MR25 METAL FILM 604 5322 116 54624 11 5K 1 25 METAL FILM 605 5322 116 54456 90 9 1 MR25 METAL FILM 606 5322 116 50417 162 1 MR25 METAL FILM 607 5322 16 54552 2 05K 1 nn25 METAL FILM 608 5322 116 54192 5 11 1 MR2 METAL FILM 609 5322 116 54712 147K 1 MR25 METAL FILM 610 5322 116 50482 33 2 1 MR25 METAL FILM 62 5322 116 54518 383 1 HB 25 METAL FILM 612 5322 116 54694 90 9K 1 MR25 METAL 613 5322 116 54557 1 21K 1 MR25 METAL FILM 615 615 5322 116 54466 90 9 1 25 METAL FILM 616 4822 116 51234 750 1 MR25 METAL FILM 6 2 2 65 ITEM ORDERING NUMBER TYPE DESCRIPTION COILS U1 701 5322 157 54136 6MUH 1 COIL X TAL U1 751 4822 242 70323 X TAL 33619 2 FOR G AND I VERSION For M and MM version see 5 5 Unit 2 ITEM ORDERING HUMBER TYPE DESCRIPTION TRANSISTOR U2 301 4822 130 60902 BF240 302 5322 130 44237 BF450 DIODES U2 601 6822 130 30664 BB106 402 5322 130 34794 244 565 47 403 4822 130 30413 BANG 404 5322 130 34794 DA244 405 48522 130 30613 BAV G2 406 5322 130 34794 DA2656 407 4822 130 30613 BAW62 ITEM ORDERING NUMBER FARAD TOL 1 VOLTS REMARKS CAPACITORS U2 501 4822 122 31063 22P 2 100 CERAMIC PLATE 502 4322 122 30103 22H 20 80 63 CERAMIC PLATE 503 4322 122 51069 OP 2 160 CERAMIC PLATE 50 5322 125 56058 Zeer 250 TRIMMER 505 4822 122 31076 68P 2 100 CERAMIC PLATE 506 4822 121 50566 IN 5 Te P
41. 822 122 561 4822 124 562 565 4822 122 566 4822 124 567 568 4822 122 569 4822 124 570 5322 124 571 4822 124 572 5322 12 573 575 6822 121 576 4822 124 577 4822 122 578 4822 1232 579 5322 124 580 4822 121 581 4822 12 582 822 124 583 4822 122 585 122 585 822 12 590 4822 124 595 5322 121 596 see SGS 37 597 see SGS 47 598 see SGS 47 30103 20576 31981 39103 30034 31081 39103 31243 501905 20463 30103 20453 30103 20459 31081 20469 24202 20461 26202 40522 20453 30103 31177 24202 40239 30103 20569 30103 51175 20473 20463 40197 FARAD IN 22N LON 120 10N 100N 22N 10N GECP TE 68h 630P 1309 22N 2 lt 2 22h 100N 1N 22 2 7 22H 22m 150110 e 2MU 220N 2200 150MU 150MU 150MU 220 0MU 1010 FARAD 22N 108WU 1008 22N 470P 1008 22N g2P 22N 33MU 22N 2 lt MU 22N 22MU 190P 68M 2 enU 47NU 2 2110 100H 68MU 22N 470P 2 210 47 22N 638NU 22 LN 220MU 6 U IMU TOL A 10 20 80 20 80 10 iQ 20 80 20t80 10 TOL 2 20 80 J 20 30 20 80 fo 1 20 50 20 80 20 80 2 10 20 80 4 10 20 80 20 30 10 VOLTS 0 Os C So ee Se gt oco lt Uus CO QWOWOOW NNU CA CA tN ON r2 0 G 9 m OS gs OE ON VOLTS 63 25 100 63 199 ON ON OS CA CO C CA
42. 87 885 50 WHITE e 883 YCR 12C CARR MOD SOUND 126 Asa fika A3b 3 101Vems 1 kHz 5 lt m T i 58 58 Er 505 5B 4 _4 56 Ein 4 2576 ax 1 S04 4 tkHz OSCILLATOR 350 261 574 573 _ x 859 Too 862 2 396 125 56 OSS SS I ose 12A 330 680 12C 2 BC 528 128 f T 31396 G pis o z 277 z vss sel iL TP12 Tm 253 s bes 22N uii i ANEA 3086 i Bor I 126 8 0 3 58552 120 j 220 T lt 885 1Sb b lt id CARR 382 E FM 50 5 PAL ME j PAL MN NTSC 58 SOUND INPUT AMPLIFIER O 12 12 3 RF VHF UHF T 583 QUT MODULATOR G sound agg 22N J mE 336 For Service Manuals Contact 9L n MAURITRON TECHNICAL SERVICES video 8 Cherry Tree Rd Chinnor RF AMPL 22 CHROMA AMPLIFIER Oxon T di 820 ANO REGULATOR Tel 01844 351694 Fax 01844 352554 Email enquiries mauritron co uk 12 D M 28V 15 A gut dubi J 45 1533 Baw62 2 qoos 12 7 VIDEO OUTPUT AMPLIFIER 12E ERI 36 05 SIGNAL ADDITION AMPLIFIER remem PS D L4 RATE AED RAE ELO O N e 356
43. 9675 OEL ZZES spuemuo L O3 wp ei SZ HW L gt ZEL L09vS 911 22559 829 z9 spie uo L O31 Ott 18225 OEL 2255 vor or dn SZ BIN L 606 911 2256 829 el 88 eces cov unu SZ HIN L 255 51596 911 2258 129 8 sor 88 690 Oti CCCS OP ela SZ WIN L gt OL 61975 911 ZZ S 929 sapoig eaw SZ L BLL 1058 911 2255 959 G SZ HIN L gt 9 6909 911 2255 729 Zt O1 10280 VOL 18 618 602 2256 165 122 za HJ new GZ HIN L gt v4 9590 911 255 9 waens or Dre ISE wis SZ HIN L gt 8 51055 911 2255 22 9 WU iW SZ HIN L x 5 85 5870 911 2255 129 SUNIN pajesbazuy SZ HIN L 822 16706 911 2258 059 uj S2 HIN L 28706 911 2258 619 spuemuo 0 OF Waly 96 48 2255 50 105 Raw 52 HIN 1 gt 8 68575 911 ZcC G 8t9 90 dn L9 4v 1167 OEL 2255 606 105 flaw SZ HIN L gt 8 6056 911 2255 9 UJ SZ HIN L VL 20109011 228 919 SZ HIN L soz 6990S 911 ZZES S19 9L HO s 59205 111 228 719 ES uoqupD 9L HO S 001 505 111 58 519 sno ue j 5silN aw SZ HIN i 00t 12059 011 ZZBt 119 9 HJS G 95 60906 LLL 2255 609 809 10351 8H Jo 9 JUBUOdWOD aj urs y uo
44. A4 A1 A5 sub carrier frequency sub carrier amp master oscillator control voltage line frequency field period time line pulse blank front porch line sync pulse line and burst pulse distance colour sync pulse RRP pulse distance width field pulse comp sync signal field blank trigg amplitude line and field video polarity ampl via OUT via VCR OUT pin 2 sync pulse ampl BL WH pattern signals circle checkerboard dots crosshatsch greyscale and definition lines VCR ampi period time SURVEY OF ADJUSTING ELEMENTS AND AUXILIARY EQUIPMENT adjusting elements measured value example chapter fig Z U 11 12 5 V 0 1 V PM 2412 12 5 V 20 1 V 5 V 0 15V no infiuence 790 U 10 28 V 0 5 V measuri ng instrument digital multimeter checkerboard via oscilloscope oscilloscope PM 3232 503 U1 4 433619 frequency counter or 3 582056 3 575611 MHz 5 Hz or 3 579545 606 U 1 2 6 Vpp 0 2V oscilloscope 44 2 25 513 U 1 5 4 V 5 6 V 513 U 1 PAL 15625 Hz 2 Hz NTSC M MM 15734 Hz t2 Hz PAL G I N 20 0 2 ms NTSC M MM 16 5 0 2 ms digital multimeter PM 2403 frequency re PM 6620 11 9 0 2 us 1 45 0 15 us 4 75 0 2 us 0 85 0 us 0 2 us 0 2 us 0 53 0 05 us 160 3 us oscilloscope d
45. Colour TV pattern generator PM 5519 Service manual 9499 525 00711 dust Industrial amp Electro acoustic Systems Division Industrial amp Electro acoustic Systems PHILIPS Scientific amp Analytical Equipment Scientific amp Test amp Measuring Instruments Industrial Controls Industrial Welding Equipment Industrial Data processing Systems Division 840501 TEST AND MEASURING INSIRUMENTS SGS 37 9499 528 03811 PM 5519 Colour pattern generator Already published SGS 20 SGS 27 SGS 30 Latest instruction manual 9499 525 00711 820801 3 01 10 1 Problem BAR signal incorrect e g one colour missing Solution Insert capacitor 596 150 pF 4822 122 31413 on soldering side of unit 10 between pin 8 and 7 of IC 359 2 Diode BB 113 pos 402 within the VHF UHF modulator is replaced by 2 single diodes BB 130 5322 130 32281 Because of the exchange a capacitor 39 pF parallel to C511 has to be added 5426 SGS37 3 Diodes BB 105B pos 401 403 within the VHF UHF modulator are replaced by diodes BB 405B service code 5322 130 34953 4 Within series LO 016 1C351 TCA820 in the modulator 1s replaced by TDAS20 T 5322 209 81981 Additional alterations C 501 502 506 altered to InF 5322 122 31998 R 602 i 83KO0l 5322 116 54582 The pinning of TCA820 and TDAOS2OT is different TCA820 is not available anymore at Concern Service In case of defective TCAS20 a new complet
46. ETAL METAL METAL METAL FETAL METAL METAL METAL METAL METAL METAL METAL METAL METAL METAL METAL ETAL TRIMMING METAL METAL METAL METAL METAL METAL METAL METAL METAL METAL METAL METAL METAL METAL METAL METAL ETAL METAL METAL METAL METAL METAL METAL METAL METAL METAL METAL METAL METAL METAL METAL select in test select in test METAL METAL METAL METAL METAL METAL METAL FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM POTM 71 FILM see SGS 47 FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM FILM see SGS 47 lt series 0 from LO 06 onwards 72 ITEM 756 757 758 759 760 761 762 763 764 765 766 767 768 769 771 772 773 776 775 776 777 778 779 780 781 782 783 786 785 786 787 788 789 790 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 81 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 ORDERING NUMBER 5322 5322 5322 5322 5322 5322 5322 5322 5322 5322 5322 5322 5322 5322 5322 5322 4822 5322 5322 5322 5322 5322 5322 5322 5322 5
47. Forming the circle fig 10 2 The comparator 309 313 is adjusted by 671 within the voltage divider 672 669 so that transistor 309 is cut off and 310 conducts When the added parabola voltages are exceeding the comparator level the current of the difference stage is taken over by transistor 309 Approaching the comparator level from higher voltages the same effect results in reverse direction So at the common cathode pulses of half the diode forward voltage origine fig 10 1 The different thickness of the circle when selecting white or black circle is achieved by the differentiations within the decoupling stages 312 and 313 Multiburst signal The pulses which generate the stepwise increasing current into pin 9 U3 are shown in fig 9 Just as this current the multivibrator frequency changes too 5 groups or groups The multivibrator fig 28 is a symmetrical emitter coupled oscillator The transistors 351 11 and 351 14 work as normal amplifier and 351 13 and 351 12 as emitter follower By increasing decreasing the base voltage of 351 5 and 4 to a higher lower level than 351 6 and 3 the whole current passes through 351 13 and 351 12 no oscillation through 351 11 and 351 14 oscillation Oscillation starts if input 8 U3 is clamped to 5 8 V by the zener diode 407 U10 The blanking and start stop signal is generated by the AND gate 368 6 The frequency of 4 8 MHz is adjustable by 606 U3 and 0 8 MHz by 624 U3 The adjustment of the multib
48. H N75L5112N M765LS164N H76LS11H N74 L50384A N74LS104A N74LS20A N74 LS05N N765LS004A 7815151 N74LS09A N74LS104 N GLSOOQA N74LS26A N74L509A N74L5104A i74LS12N N74L 500A N74LS5S26A N74LS1C0A H74LS26A N74LS10A N74LS11N N76LS895A N74L515N N7 LS112N MOS HEF4016BP AAZ15 BAU62 BZX79 B5V6 BAW62 BZX75 C2V8 BZX75 C2Vl BAW62 For Service Manuals Contact MAURITRON TECHNICAL SERVICES 8 Cherry Tree Rd Chinnor Oxon OX9 4QY Tel 01844 351694 01844 352554 Email enquiries mauritron co uk NUMBER 31175 30193 30043 20453 56095 34041 40522 50105 30043 31178 20571 56176 54121 30103 20677 30103 40522 31175 30103 31038 30103 20677 20672 20677 40427 20677 20672 31067 20566 20672 20762 20698 ORDERING HUMBER ITEM ORDERING CAPACITORSZU1O 501 4822 122 502 503 4822 122 504 4822 122 505 6822 124 507 6822 12 508 5322 122 509 4822 121 510 4822 122 511 4822 122 512 4822 122 513 515 515 4822 124 5163517 5322 121 518 519 5322 121 520 822 122 521 4822 12 522 4822 122 523 526 4822 121 527 amp 822 122 528 4822 122 529 4822 122 530 4822 122 531 4822 124 532 6822 125 533 534 4822 124 535 4822 121 53655357 4822 124 538 4822 124 539 4822 122 540 4822 124 541 542 4822 124 543 4822 124 544 4822 124 LIEM 545 4822 122 546 4822 12 547 548 4822 122 569 4822 l22 550 4822 122 551 4822 122 552 6822 122 553 68822 122 55 6822 122 555 4822 12 556 560 S
49. L METAL FILM 1 FILM CARBON POTM LIN SHIT METAL FILM METAL FILM METAL FILM METAL FILM METAL FILM For Service Manuals Contact MAURITRON TECHNICAL SERVICES 8 Cherry Tree Rd Chinnor Oxon OX9 4QY Tel 01844 351694 Fax 01844 352554 OHM TOL 100K 1 25 5 11 1 25 6 9 1 MR25 K l MR25 649K 1 iK 1 MR25 649K 1 MR25 d l MR25 38 3K 1 ee 22K LIN 1 33K 1 bu 1 27 1 MR25 825 1 MR25 1 4K TYPE DESCRIPTION 6MUH COIL 100MUH COIL TYPE DESCRIPTION BC548 BC558B BF494 BC548 TCA240 BAN62 FARAD TOL X VOLTS 82P 2 100 680P 1 250 22N 20 80 63 33MU l6 22N 20 80 63 22N 20 80 63 4P7 0 25 100 Email enquiries mauritron co uk REMARKS CERAMIC PLATE POLYSTYRENE FOIL CERAMIC PLATE ELECTROLYTIC CERAMIC PLATE CERAMIC PLATE CERAMIC PLATE OHM 100 1 47K 1 69K amp 25see SGS 47 590 IK 487 1 6 9K 1 47K 11K 100 192 6K 187 196 05K 3 343K TK LIK 100 19 6K 1 47K LOK 100 6 22K 109 287 100R 631 365 287 4 22 TOL 2 E pe E x b dA de TYPE DESCRIPTION TYPE MR25 1525 HR25 Do 25 LIN R25 MR25 25 Mx25 MR25 MR25 525 MR25 25 Picco REJ LIN MR25 25 25 25 HR25 LIN MR25 MR2 MR25 MK 25 ITEM ORDERING NUMBER RESISTORS U3 601 5322 116 54469 602 5322 116 50635 603 5322 116 54567 604 5322 116 54541 605 5322 116 50561 606 482
50. M ORDERING NUMBER INTEGRATED CIRC UI10 314 323 324 326 3275920 331 326 350 221 332 553 354 355 356 357 358 293 360 361 362 365 366 364 34 5 376 377 378 379 380 381 384 385 386 537 388 590 391 392 395 334 395 396 100 5 010 401 402 404 406 07 408 414 416 424 426 430 431 432 433 434 435 295e 5322 S322 Doce DOC 5322 5322 5322 5262 Dope 5322 5322 5322 5322 3522 236 Fize 5322 5342 5322 Jace 5322 JoeL 5322 5322 5322 5322 Doce 5322 5322 5322 2222 Doce S526 990 3522 2322 5322 5322 53522 Doce 5322 5322 4822 4822 4822 4822 4822 4822 G822 209 209 203 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 209 203 209 209 209 209 209 209 209 207 203 209 130 150 130 130 130 130 150 85862 85303 85111 85803 85111 65971 85508 5471 85573 5685 85832 85405 85974 85823 845396 85973 85604 84237 85002 85606 845995 4996 85569 3499 5823 85972 85801 85996 858235 85532 852801 85995 65504 85985 E4823 5832 84996 85832 84996 85604 84997 85972 84237 14119 30229 50613 35173 30613 34048 34049 30613 TYPE DESCRIPTION 56358233 1 96 CA3986 MC1496A CA3086 00320 741 52216 095501 005502 N74LS504N 926A N74LS193N S5N74L5109AH 00 H 4L5004A H74LS10A H74L 592A N74L511
51. OLYSTYRENE FOIL 507 4822 122 31058 158 2 100 CERAMIC PLATE 508 5322 125 54006 1 6 P 600 509 4822 122 30043 10N 20 80 63 CERAMIC PLATE 510 511 4822 122 31061 18 100 CERAMIC PLATE 512 5322 125 55006 1 6P 400 TRIMMER 513 4822 122 30043 10N 20 80 63 CERAMIC PLATE 514 4822 122 319074 56P 2 100 CERAMIC PLATE 515 4822 122 31056 128 2 100 CERAMIC PLATE 516 5322 125 54906 100 TRIMMER 517 4822 122 30043 10N 20 80 63 CERAMIC PLATE 518 520 4822 122 30103 22N 20 80 63 CERAMIC PLATE 521 5322 124 24202 2 2oMU 63 ELECTROLYTIC 66 ITEM ORDERING NUMBER RESISTORS U2 01 602 5322 116 54696 603 5322 116 54192 644 605 5322 116 55331 606 5322 116 545849 607 608 5322 116 55331 609 5322 116 54549 610 611 5322 116 55331 612 5322 116 54469 613 5322 116 50683 614 5322 101 44041 615 5322 116 54561 616 5322 116 50766 617 5322 116 50555 618 5322 116 54541 619 5322 116 54562 ITEM ORDERING NUM ER COILS U2 801 5322 157 54136 802 5322 158 10243 0 2 3 Un3t 3 ITEM ORDERING NUMBER TRANSISTOR U3 301 6822 130 40938 302 4822 130 44197 304 303 4822 130 441935 305 307 6822 130 40938 INTEGRATED CIRC U3 351 5322 209 84695 DIODES UJ3 401 405 4822 130 30613 ITEM ORDERING NUMBER CAPACITORS U3 501 502 6822 122 31243 503 5322 121 54174 504 505 4822 122 30103 506 4822 124 20468 507 6822 122 30103 508 4822 122 30103 510 4822 122 31045 REMARKS FILM FILM FILM FILM FILM FILM FILM METAL METAL METAL METAL METAL METAL META
52. PURI TY 12A lt 12 12 COLOUR PULSE GENERATION 12 12 12 12 COLOUR SWITCH 12 EIS 850 s 846 CET E 1679 433 25566 2 12 985 13 g BAR 431 7 885 2a 800 68 CHECKERBOARD 5 l L z ag 3 367 6 3 367 m a 2 369 P anf 12 369 ar Sarica Manuals Contac PI 628 371 fig 649 8 RITRON TECHNICAL SERI EE m 8 Cherry Tree Ra O ESSE Tek 01044 351694 Fax 01844 35255 dL sisi G6 5 120 sae d 2 407 m LTIBURST 0561 827 79 8 Y PY LJ 583 BH i2D 51 1 3 c4 ee UE MED ta 50711 302 P 9 lt lt y VIDEO XT INPUT 12C CARR 3800 SOUNO 126 3 12C 2 2 A 3086 12 12 12 0 12 COLOUR PHASE 825 B im gt SWITCHES 535 842 x 2203 723 SOUS VIDEO 5E AMPLIFIER SOUND INPUT 12 AMPLIFIER 433 1566 8277 C2 VI J e 12E 692 8 25 12 523 2P7 8 8 gt MSS 530 693 de g e 22N 12 CHROMA AMPLIFIER S gt AND REGULATOR 865 1 5 BAR 2 355 356 1358 372 376 384 391 386 3
53. U11 34 2 5322 255 44129 Heat sink U11 35 1 5322 325 60119 Pull relief 36 1 5322 290 30192 Soldering terminal 37 1 5322 325 64068 Grommet for cover S 38 1 5322 321 14048 Mains cable 1850 gt 39 1 5322 401 14275 Mains cable clamp 5 40 1 5322 212 84113 Unit 1 compl S safety component 62 Item 41 42 43 44 45 46 47 48 49 50 51 52 53 54 Sept Fig 21 Quantity l3 cA wi 2 1984 Front view spare parts Order number 9322 25322 5322 5322 5322 5322 5322 5322 5322 5322 90022 9342 9322 5322 212 212 212 218 101 105 116 116 146 280 121 390 116 252 84115 84116 84114 64054 44084 40007 54608 54592 20675 24047 44028 20019 54188 20092 Description Unit 2 compl Unit 3 compl Unit 11 compl VHF UHF Modulator Potentiometer 10 kOhm RF Potentiometer 75 Ohm pos 594 7 5 kOhm 1 pos 748 4 02 kOhm 1 pos 750 Mains transformer pos 785 5 Relais U10 pos 891 894 Capacit XY 10N 2x2 5N pos 595 s Silicon paste DC 34O 1MOhm 1 pos 600 Therm fuse switch gt series O7 S 5 safety component For Service Manuals Contact MAURITRON TECHNICAL SERVICES 8 Cherry Tree Rd Chinnor Oxon OX9 4QY Tel 01844 351694 Fax 01844 352554 Email enquiries mauritron co uk 63 7 om U11 U 1 NS Rr a ll SNR RCE AL AEE EERE HC 2 ene WAU reti so U10
54. age Dismantling the instrument Knobs Textplate Pushbutton unit CHECK AND ADJUSTMENT Survey of adjusting elements and auxiliary equipment General Power supply Modulation and synchronisation frequency and pulses Video signals RF check BL WH pattern and signals Colour signals Colour pattern signals External video Sound check with table and figure for adjustment MODIFICATION INTO VARIOUS VERSIONS Performance details of various versions Modification of PM 5519 G into PM 5519 Modification of PM 5519 G into PM 5519 N Modification of PM 5519 G into PM 5519 M Modification of PM 5519 G into PM 5519 MM PARTS LIST Mechanical parts miscellaneous with figures 21 23 Electrical parts FIGURES 24 35 CODING SYSTEM OF FAILURE REPORTING FOR QUALITY ADDRESSES FOR SALES AND SERVICE 76 LIST OF FIGURES Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig o o 1000 WD N 10 1 10 2 11 12 13 14 15 16 17 18 19 20 1 20 2 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 Block diagram Overall circuit diagram Phase locked loop of master and sub carrier oscillator Field and line raster signals Pulse diagram of OQ5501 NTSC norm Pulse diagram of OQ5501 CCIR norm Blanking and control signals Horizontal
55. and V dc voltages which are applied via decoupling diodes If no pushbutton PUR is pressed the centre points of the matrix is set to OV that means the matrix is out of operation The luminance matrix 694 696 fig 13 generates the luminance of the 3 primary and 3 complementary colours and the colour bar luminance The colour purity luminance is applied to the summing junction by disabling the corresponding AND gates 375 12 375 6 and 375 8 by the purity contacts The automatic generation of the colour bar luminance staircase follows by releasing the ABC signals via the AND gates 376 3 376 6 and 376 8 During line return time the blanking signal 354 6 stops the addition of the luminance staircase In the same way during active line time the circle pulses combined with the blanking signal reduce the stair case value to black level fig 6 12V GREEN gs7 420 94 418 2 Matrix of the monochrome pattern red green and blue 39 2 2 8 4 Pushbutton DEM depressed fig 20 1 The summing junction ZP2 has low level via AND gate 378 8 fig 11 The luminance of the whole DEM pattern is 50 96 white applied to the summing junction 2P3 via the AND gate 374 3 see fig 13 In the first bar of the DEM pattern the component G Y O The second bar has no colour information at all The third bar consists of a R Y component only but NTSC coded and the fourth bar consist
56. ble RF pre selector fig 2 The RF channel selector consists of 6 independant pre selectable band and channel memories The 6 channels are stored by using the corresponding potentiometer the band selection can be done by rotary switches POWER SUPPLY unit 11 fig 30 The power supply unit supplies four stabilized voltages 28V for tuning the RF modulator 12V 12V and 5V The 12V is adjusted by 605 607 with solder bridges X Y Z The 12V supply voltage is adjusted by 608 610 with solder bridges U V W The 5V is stabilized via 354 3 1 3 1 1 3 2 3 3 45 INSTALLATION ACCESS TO PARTS SAFETY REGULATIONS Upon delivery the instrument complies with therequiredsafety regulations To maintain this condition and to ensure safe operation it is recommended to follow the instructions below Before connecting Mains voltage Check whether the instrument is adapted to the nominal mains voltage Protection This instrument is protected according to class protective earth of the 348 VDE 0411 The mains cable provides earth connection Outside specially protected rooms the mains plug must be con nected only to sockets with earthed contact It is not allowed to interrupt the earth connection inside or outside the instrument Maintenance and repair Failure and excessive stress If the instrument is suspected of being unsafe take it out of operation permanently This is the case when t
57. e VHF UHF modulator 5322 218 64054 must be taken 5 Please correct Service manual chapter 2 1 2 V 312 5 or 262 5 lines 6 5501 pos 351 unit 10 15 not available due to end of production Replacement type 1S OQ5506 same pinning service code 5322 209 81945 Additional alterations Remove NTC resistor 330E pos 605 replace resistor 42 2E pos 608 by 53 6E MR 25 5322 116 54444 Colour V pattern generator PM 5519 9452 055 19003 Service manual 9499 525 00711 870501 4 PHILIPS Please note In correspondence concerning this instrument please quote the type number and serial number asgiven on the type plate Bitte beachten Bei Schriftwechsel uber dieses Gerat wird gebeten die Typennummer und die Geratenummer anzugeben Diese befinden sich auf dem Typenschild an der Ruckseite des Gerates Note s v p Dans votre correspondance et dans vos reclamations se rapportant B cet appareil veuillez toujours indiquer le numero de type et le numero de seriequi sont marques sur la plaquette de caracteristiques Important As the instrument is an electrical apparatus it may be operated only by trained personnel Maintenance and repairs may also be carried out only by qualified personnel Wichtig Da das Gerat ein elektrisches Betriebsmittel ist darf die Bedienung nur durch eingewiesenes Personal erfolgen Wartung und Reparatur durfen nur vo
58. e is achieved Sound input amplifier For external sound signals a decoupling preamplifier 329 331 12 13 14 9 10 11 is available By means of soldering link E the required pre emphasis of 50 us for FM mode can be obtained The choice of internal or external sound to be fed into the modulation circuitry is done by the electronic relay 396 The sound oscillator and modulator unit 2 fig 26 is a Colpitts circuitry with transistor 301 U2 By means of adjusted capacitors activated by switching diodes it is possible to select the following frequencies 6 5 MHz 6 0 MHz 5 5 MHz and 5 MHz Corresponding solder links H J K are to be set on unit 10 No soldering link closed means 6 5 MHz oscillation This frequency is adjusted by 504 U2 while the amplitude is set by 614 U2 The other sound carriers are obtained by adding capacitors parallel to the os cillator circuitry This coupling or decoupling is done by means of the corresponding diode switching circuitries e g 402 403 604 605 606 The sound carrier frequencies of 4 5 MHz 5 5 MHz and 6 0 MHz are adjusted by trimmer 508 512 and 516 The frequency modulation of the sound carrier occurs by varicap 401 whereby the frequency sweep for 5 5 MHz is adjusted by 877 U10 The sweep of the other sound carrier frequencies depends on the capacitance ratio Transistor 302 U2 serves as amplitude modulator By depressing push buttons CARR MOD and SOUND the operating mode of the sound circuit
59. e resistor 660 237 kOhm by resistor of 301 kOhm e Replace resistor 838 316 Ohm by resistor of 442 Ohm e Replace resistor 840 357 Ohm by resistor of 442 Ohm e Check and if necessary correct vision to sound distance according to chapter 4 11 1 and chapter 4 11 3 table 1 1 60 PM 5519 For Service Manuals Contact 1246 MAURITRON TECHNICAL SERVICES 8 Cherry Tree Rd Chinnor Oxon OX9 4QY Tel 01844 351694 Fax 01844 352554 Email enquiries mauritron co uk Unit 1 e Close solder joint M e Open solder joint N e Replace X tal 751 by X tal of 3 575611 MHz e If amplitude of colour carrier is not sinusoidal or is higher than prescribed Replace capacitor 507 33 pF by capacitor of 100 pF e Check adjustment according to 4 4 1 if necessary correct 4 4 2 4 8 2 and 4 9 Add suffix M to type plate at the rear PM 5519G into PM 5519MM NTSC Unit 10O e Close solder joint K e Replace capacitor 580 47 nF by capacitor of 68 nF e Replace resistor 660 237 kOhm by resistor of 301 kOhm e Replace resistor 798 11 5 kOhm by resistor of 6 81 kOhm e Replace resistor 838 316 kOhm by resistor of 442 Ohm e Replace resistor 840 357 Ohm by resistor of 442 Ohm e Isolate pin 6 of 005502 pos 352 and ground pin 6 separately Cut pin 6 from the pcb and connect pin 6 of the integrated circuit directly to pin 7 8 of 005502 e Check and if necessary correct vision to sound distance according to chapter 4 11 1
60. e shown resistor matrix The corresponding luminance staircase is generated by the summing resistors 694 695 696 the driving signals are A B C The colour difference signals modulate the 909 phase shifted colour carrier frequencies The resulting chroma signal is separated from all dc components by the coil 889 The amplified and calibrated chroma signal is coupled to the summing junction EP3 by 530 and 693 whereby the luminance staircase is fed in via 694 695 696 229 2 2 9 1 2 292 212 9 3 2 2 9 4 Chroma and video channels The chroma amplifier is a differential amplifier with an input and output buffer emitter follower The chroma signal is fed in via the emitter 326 10 and capacitor 556 and added to the dc emitter current of the differential amplifier A dc current applied to the feed back resistor 813 819 enables to change the current balance through the two transistors For a constant ac dc current ratio the chroma ampli tude at 326 6 can be adjusted by changing the applied dc current The calibration to the correct chroma amplitude is done by potmeter 823 with depressed CHROMA AMPL pushbutton 100 Combined CHROMA AMPL pushbutton action of 50 96 and 0 96 decreases the chroma amplitude by increased dc current Combined pushbuttons 100 and 50 result in nominal 75 96 50 96 and 0 96 in nominal 25 96 amplitude of the chroma amplitude with 75 96 saturation When none of the buttons is pressed the amplitude is 130
61. elayed PM 3250 or 158 9 3 us time base 1 6 0 1 ms i 714 U 10 p p level see fig 4 5 1 oscilloscope PM 3232 fig in 4 5 1 ES 2 Vpp 0 06 V 23 lt 600 mVpp oscilloscope PM 3232 664 U 10 optically circular TV receiver 671 U 10 circle diameter 657 748 U 10 excentricity ellipticity 4 7 2 2 0 1 V 29 B 2 0 V ir 2 0 1 V 4 7 3 624 U 3 1st bar 1 25 0 05 us 29 606 U 3 5th bar 0 208 0 006 us 631 U 3 1 9 z0 1 Vpp 4 7 4 29 1 st fr group 0 3 to 0 32 us 2 nd fr group 0 322 to 0 344 us 3 rd fr group 0 349 to 0 371 us 47 adjustment adjusting elements measured value instrument example chapter fig chroma amplitude 823 010 4th bar upper level oscilloscope PM 3232 to 7596 white colour modulator 800 809 U 10 colour carrier to minimum oscilloscope and PM 3232 only for rough adjustment symmetry 811 U 10 colour pattern signals Pes 1 0 05 V with 75 5 4 9 white ampl 74110 10 load resistor termination PM 9586 monochrome vectorscope figures vectorscope 1421 4 9 1 75 9 Tektronix bar 811 U 10 burst phase 90 1 DEM 4 9 2 VCR sound check 140 1 Vrms to VCR conn oscilloscope PM 3232 4 11 1 1 kHz generator intern pin 4 1 kHz at load of 10 KQ carrier frequency 504 or 508 or see table 1 1 counter or PM 6620 or table 1 1 512 or 516 U 2 selektive Bruell amp
62. enerator 351 14 The components for the horizontal bars and fields are achieved by frequency division flipflop 363 354 11 when replacing OQ550t change polarity of the ess 29 clock pulse if necessary instable checkerboard 0116 15 625 Hz 2 ty aus 525 116 CNT 80 2 0 8 us 20142 3209s 1 01 6 08 1 366 8 multiburst puise generation 55 8 12 8 us 2 51 2 2564s Fig 7 Horizontal pattern components For Service Manuals Contact MAURITRON TECHNICAL SERVICES 8 Cherry Tree Rd Chinnor Oxon OX9 4QY Tel 01844 351694 Fax 01844 352554 Email enquiries mauritron co uk lt lt lt 25 hor centre of picture 20 ms 312 5 lines SV 360 8 LU hl 241 L 48 lines lt p 363 8 js za t j 363 7 ME 96 1 2 TF 363 5 v 363 6 lt 19 192 48 ivo 364 5 2 364 6 v 325 325 he 96 gt 364 9 364 7 zd 24 e lines ws LLLA wi T Fig 8 Field pulse generation components 26 2 2 4 2 2 4 1 2 2 4 2 2 2 4 3 Staircase signals The staircase signals for control of the multiburst oscillator input unit 3 in fig 9 are generated by summing the components of the generator 366 4 5 6 10 11 for the 5 vertical bars with different fre quency groups definition lines In line rhythm the inputs of the inverters 371 11 9 5 13 progressively
63. er frequency Main pulse generator The main pulse generator 005501 1C351 1 on unit 10 generates the required raster signals by dividing the master frequency of 2 5 MHz see fig 5 1 5 2 and 6 The reference time t 0 is the leading edge of the line blank signal the pulses of which have a duration of 12 us with a repetition time of 64 us Decoupling inverter and gates 353 and 354 serve for signal generation in rhythm of line and pic ture fig 6 22 Fig 4 2 2 2 2 2 2 1 2222 016ms 0 32 5 64 us 6352 us 12 us 111us 1615 O8us 2 amp us T 2 us 5242 us x amp Bus 20 ms 16 67ms 161 252 lines 2873 lines 135ms 2 21 lines 242 5lines x 079 m 2 5 Slines x M and version Field and line raster signals Horizontal pattern components vertical lines and bars With exception of the circle all the pattern components are normal square wave signals the repetition frequencies of which are integer From stage to stage down to 1 25 times the line frequency the coun ters 356 and 355 fig 7 divide the master frequency by 2 During line blank the division is interrupted although the clock frequency is further running so that the pictures origine during the active line periods only The components for the vertical lines and dots rows are obtained by the flipflop 365 which in the rhythm of 20 f is triggered by the cou
64. fed into the feed back resistor 736 The video signal is decoupled by the emitter follower 319 and added to the constant dc emitter current of 320 321 via 540 and 733 The ratio of the ac dc current through 320 and 321 is constant independent of the current balance The calibrated video amplitude of 1V _ into 75 Q is determined by the current through737 which is fed in by switching the VIDEO AMPL potentiometer to the stop position This value is calibrated by resistor 747 paralleled to 739 The video amplitude variation from 0 to 1 5 V__ can be done by the VIDEO AMPL potentiometer The amplitude at 735 is fed out by the emitter follower 325 and ac coupled via 542 to the power emitter follower 322 The video signal is available at the BNC connector VIDEO OUT being ac coupled The output impedance is 75 Q For Service Manuals Contact MAURITRON TECHNICAL SERVICES 8 Cherry Tree Rd Chinnor Oxon OX9 4QY Tel 01844 351694 Fax 01844 352554 Email enquiries mauritron co uk 41 42 2 3 2 3 1 2 3 2 2 3 3 SOUND GENERATOR The sound part consists of the sound carrier oscillator a 1kHz generator an input circuitry for external sound signals and a frequency and amplitude modulator The 1 kHz generator is a RC oscillator based on the Wien bridge principle the components of which are 860 573 and 861 574 A rectifier is added balancing the differential amplifier 331 1 2 3 4 5 So the stability of oscillation and amplitud
65. for 400 5 Vrms If necessary adjust with 614 U 2 e Unlock button MOD 4 11 2 Sound external e Push button SOUND 1 kHz EXT e Feed external sinewave 1 kHz 0 2 Vrms 0 566 Vpp to connection AUDIO pin 3 rear side e Connect modulation meter to 6 U 2 for deviation check e he deviation must be 40 kHz 3 kHz adjustment with 877 U 2 4 11 3 Amplitude RF sound carrier see also SGS 47 e Push button CHECKERBOARD and SOUND MOD CARR ON OFF Turn RF AMPL to maximum e Connect a selective voltmeter e g Bruell amp Kjaer 2007 to RF OUT and check that the amplitude ratio of the video to the sound carrier is 12 5 dB at a frequency of e g 200 MHz video carrier ampl video carrier sound carrier ampl 12 5 30 5 dB If necessary adjust with 614 U 2 Table 1 1 Solder bridge fdjusting Meas value Sound carrier element to Ba ae 6 U2 6 5 MHz soimaa I 6 MEZ e 508 U2 400 5 En 5 5 MHz gt 10 kHz o 512 U2 mV rms 614 02 M N 4 5 MHz 516 U2 NTSC M MM 4 5 MHz 516 U2 FM 877 U10 Af AM With preemphasis Without preemphasis Sound ext x E 614 solder bridge open U 10 e solder bridge closed 1247 59 MODIFICATION INTO VARIOUS VERSIONS PERFORMANCE DETAILS OF VARIOUS VERSIONS For changing PM 5519 to the version I N M MM NTSC see chapter 1 25425 For special requirements and for some countries there are extended versions of CTV Pattern Generator PM 5519 on the market There does
66. h 4 2 5322 530 84075 Spring 5 2 5322 528 34101 Ratchet 6 2 5322 532 54425 Ring for handle grey 6 2 5322 532 51481 Ring for handle brown 7 2 5322 498 54048 Arm of handle 8 1 5322 498 54051 Carrying handle 9 2 5322 414 64053 Knob grey 9 2 5322 414 30043 Knob brown 10 1 5322 447 94188 Back frame 12 4 5322 462 44176 Foot rear side 13 1 5322 502 24525 Coin slot screw 14 1 4822 530 70124 Locking washer for pos 13 15 2 5322 414 74014 Cover for knobs grey 15 2 5322 414 70017 Cover for knobs brown 16 1 5322 455 74084 Textplate grey 17 1 5322 459 24076 Front frame 18 1 5322 447 94363 Contact protection cap 19 4 5322 462 34115 Print holder 20 1 5322 414 34083 Control knob grey 20 1 5322 414 30069 Control knob brown 21 1 5322 414 34082 Control knob grey 21 1 5322 414 30039 Control knob brown 22 21 5322 414 25851 Knob for pushbutton grey 22 21 5322 414 20033 Knob for pushbutton brown 23 5 5322 267 10004 BNC Connector pos 295 299 24 1 5322 276 14128 Mains switch pos 881 25 1 5322 218 64095 Memostat pos 882 25a 6 5322 414 30027 Knob small for memostat 26 6 5322 276 84068 Switch U1O pos 885 1 11 15 27 9 5322 276 840069 Switch U10 pos 885 2 10 28 2 5322 276 34058 Switch pos 886 887 29 1 4822 267 40045 DIN Connector 6 pol pos 883 30 1 4822 267 40039 DIN Connector 5 pol pos 884 3 1 1 3322 272 102 15 Mains selector pos 885 5 32 2 4822 266 30073 6 pol socket 33 2 4822 265 30117 6 pol plug
67. he instrument e shows physical damage e does not function anymore e isstressed beyond the tolerable limits e g during storage and transportation Dismantling the instrument When removing covers or other parts by means of tools live parts or terminals could be exposed Before opening the instrument disconnect it from all power sources If the open live instrument needs calibration maintenance or a repair it must be performed only by trained personnel being aware of the risks After disconnection from all power sources the capacitors in the instrument may remain charged for some seconds Fuses Only use the specified fuses Repair Replacing parts Repairs must be made by tranined personnel Ensure that the construction of the instrument is not altered to the detriment of safety Above all leakage paths air gaps and insulation layers must not be reduced When replacing use only original parts Other spare parts are only acceptable when the safety precautions for the instrument are not impaired OPERATING POSITION The instrument may be used in any desired position With the handle fold down the instrument may be used in sloping position for this purpose press the buttons of the handle Do not position the instrument on any surface which produces or radiates heat or in direct sunlight EARTHING Before switching on the instrument must be earthed in conformity with the local safety regulations The mains cable includes an ear
68. he knob ensure that the white mark is correctly aligned with the text plate markings TEXTPLATE Remove the cabinet see 3 5 Remove the turn knobs see 3 6 Remove the plastic cover of the mains switch The text plate can now be removed Be careful The textplate is fitted to the frontplate by double sided adhesive tape PUSHBUTTON UNIT For Service Manuals Contact Replacing a pushbutton lever MAURITRON TECHNICAL SERVICES 8 Cherry Tree Rd Chinnor Oxon OX9 4QY The single pushbutton lever can be replaced from the front Tel 01844 351694 Fax 01844 352554 e Push the spring towards the pushbuttons Email enquiries mauritron co uk e Remove the wire strap and or lift the plastic reed between the contacts e Carefully tear the pushbutton lever out of the pushbutton Replacing a switch of the pushbutton unit e Straighten the 4 retaining lugs of the relevant switches as shown in the figure below e Break the body of the relevant switch by means of a pair of pliers and remove the pieces The soldering pins are then accessible e Hemove the soldering pins and clean the holes in the printed circuit board e g with a suction sol dering iron Bend the 4 retaining lugs back to their original positions Solder the new switch on tne printed circuit board 4 CHECK AND ADJUSTMENT 4 1 adjustment power consumption supply voltages mains fluctuations from 198 Vac to 242 Vac hum points AO A2 AQ
69. iries mauritron co uk Fig 18 Colour difference modulators and phase switches of the colour carrier frequencies 2 2 8 2 PAL and DEM phase switch The colour carrier frequency is divided into two components 909 phase shifted with respect to each other by means at the RC low pass filter and the CR high pass filter 45 for ee ee Pun ane ob shifted frequencies are applied to different input polarities 327 8 input and 328 10 input The nos of the outputs 327 6 and 328 6 can be switched to 09 or 180 depending on the digital sig nals at the inputs 327 4 and 328 4 Low level e g at 327 4 cuts off the dc current source Q5 and so the transistors Q1 and Q2 see fig 18 detail MC 1496 A the whole current of Q7 O8 passes Q6 The output pin 6 obtains the polarity of O3 and the negative polarity of Q1 if there is a high level at the input 327 4 38 22 0 9 Fig 19 Monochrome pattern purity fig 19 In combination with depressed PUR pushbutton and primary colour pushbutton the chosen colour is generated with 75 saturation Activating one of the primary colour switches originates two dc voltage components by means of three resistors the components are rU rV or gU gV or bU bV and they are applied to the or inputs of the R Y B Y modulators if the PUR and one of the primary pushbuttons is pressed the 909 phase shifted subcarrier frequencies are modulated by the corresponding U
70. low level at one input of each gate NAND gate 381 8 couples the square wave signals 5 f 393 9 and 1 3 25 V 393 10 to the summing junction 2P2 if no other pushbutton VCR white is depressed The AND gate 393 8 com bines the horizontal checkerboard pulses 5 f with the vertica 1 3 25 V pulses to 8 vertical checker board bars and 6 horizontal one s White pattern squares are generated if 5 Jtr 1 3 25 V and the blan king signal f have high level So the NAND gate 379 8 gets low level NAND gate 381 8 high level and the current in resistor 687 U10 is inhibited Pushbutton dots The NAND gate 380 6 combines the 20 and 1 13 V pulses resulting in a signal with 13 horizontal lines distance 24 lines of 17 pulses pulse width 200 ns pulse distance 3 2 us The dots are the intersections of the horizontal and vertical crosshatch lines Pushbutton crosshatch The inverted signals 20 f and 1 13 V are connected via NAND gate 380 12 Out of this connection 17 vertical lines are generated distance 3 2 us if 20 has low level and 13 horizontal lines distance 24 lines if 1 13 V has low level Gate 377 3 inverts this crosshatch signal to the necessary polarity Pushbutton circle The NAND gates 379 6 and 379 12 are enabled The circle pulses see chapter 2 2 5 and fig 10 2 change their distance from line to line according to the function of a circle The circle pulses cut off the current through resistor
71. lt 30 in the whole VHF UHF range if no spectrum analyzer available use well adjusted CTV receiver and connect oscilloscope 50 MHz via high impedance probe to the IF stage 4 1 1 3 Amplitude RF soundcarrier Push button CHECKERBOARD and SOUND MOD CARR ON OFF Turn RF AMPL to maximum Connect a selective voltmeter e g Bruell amp Kjaer 2007 to RF OUT and check that the ampli tude ratio of the video to the sound carrier is 13 14 dB at a frequency of eg 200 MHz If necessary adjust with 614 U 2 Alteration concerns also table on page 48 CONTENTS SGS 37 SGS 47 Ll c c QA Service information Service information GENERAL Introduction Technical data Accessories Survey of pattern Operating principle block diagram fig 1 CIRCUIT DESCRIPTION with figures 2 20 General Video generator Raster signals Horizontal pattern components vertical lines and bars Vertical pattern components horizontal lines bars and fields Staircase signals Circle components Synthesis of the Black White test pattern Colour part Synthesis of the chroma signals Chroma and video channels Sound generator 1 kHz oscillator Sound input amplifier Sound carrier oscillator and modulator RF part VH F UHF modulator HF pre selector Power supply INSTALLATION ACCESS TO PARTS Safety regulations Operating position Earthing Adjusting to mains volt
72. n geschultem fach und sachkundigem Personal durchgefuhrt werden Important Comme l instrument est un equipement electrique le service doit etre assure par du personnel qualifie De meme l entretien et les reparations sont confier aux personnes suffisamment qualifiees PHILIPS ay Scientific amp Industrial Equipment Division 850401 TEST AND MEASURING INSTRUMENTS SGS47 9499 528 04411 PM 5519 Colour T V pattern generator Already published 5 2520 SGS27 SGS30 SGS37 Latest service manual 9499 525 0071 1 dated 820801 3 01 10 1 Problem In VIDEO EXT operating mode the pack porche of the sync pulse is distorted and the working point of transistor 317 is not okay Solution Transistor 317 BC 338 video input amplifier unit 10 is replaced by BC 337 16 5322 130 41095 from instruments LO 18 onwards Resistor 730 is paralled by a resistor 56K2 2 Problem IC 351 on unit TCA 240 was sometimes not working properly Solution Alteration of resistor 604 from 825R to 715R already inserted from LO 13 onwards 3 Problem Diode BA 244 items 402 404 406 on unit 2 is not available anymore Solution Replaced by diode BA 482 5322 130 34955 already inserted from L 0 17 onwards 4 Problem The small knobs 5322 414 30027 for memostat pie selection unit can sometimes be damaged Solution Please operate the knobs only by hands or by cross slotted screw driver Don t operate with normal scre
73. nds adjusted by means of the rotary buttons near the tip touch buttons of the RF PRE SELECTION unit For this purpose press and turn the required rotary button see chapter 2 1 4 of the operating manual Select in test amplitude band and band 111 positioned in the VHF UHF modulator 895 U 10 Residual RF carrier see also SGS 47 Channel 1 may be switched on Connect oscilloscope f 12 MHz to RF OUT Push button CHECKERBOARD Adjust the residual carrier to 10 15 6 with 606 of the VHF UHF modulator BL WH PATTERNS AND SIGNALS e Connect oscilloscope to VIDEO OUT e Connect TV receiver to RF OUT e Push buttons CHROMA AMPL 0 96 and CHROSSHATCH Circle Push buttons DOTS CIRCLE T 2 0 1V i m i e circle must be optically circular e The circle must be positioned within 9 horizontal distances of the dots e Maximum permitted eccentricity of the circle 2 x diam of a dot e Corrections can be attained by 664 U 10 671 U 10 e Correction of the vertical ellipticity is possible with 657 U 10 e Check the circle for being combinable with all test patterns 54 4 7 2 4 7 3 4 7 4 For Service Manuals Contact MAURITRON TECHNICAL SERVICES 8 Cherry Tree Rd Chinnor Oxon OX9 4QY Tel 01844 351694 01844 352554 Email enquiries mauritron co uk Standardized digital signals CHECKERBOARD 2101 DOTS ML r 2 04 V
74. nter output 356 6 After half a clock frequency 0 2 us the master frequency resets the flipflop and thus determines the line width or the diameter of the dots The components for the vertical bars are taken from the outputs 3 2 and 6 of the counter 355 This signal is 8 4 2 coded It is unsymmetrical with respect to the active part of the line The period of the of frequency is 12 8 us 1 5 of f The active line part is 51 2us 4 5 of fus The blanking signal of 12us is finished delayed by O 4us related to the outputs of the counter 355 corresponding to the period time of the clock frequency The integer periods are finished by the same O 4us before the next blanking The prolongation of the blanking time is increased to 6 6us by the flipflop 357 in connection with the gates 358 of the actual first bar of the signals Similar to this the duration of the actual three last bars of the signals A B C is enlarged by 0 4us 23 _ dd 2 0 79 us pin no 2 51MHz i BEEN O ts 0 horizontal line Ji m pM dio NO S C fot comp blank 11 12 63 52 5 I line syne 6 div 4 8us mh 0 4 ITO 16 comp 72div 837 70s 1 685 6 24us l i 8 div 26 35 5 LLL d 26 3057 7 6 355 1 5 5 5 3div 7 2 2 15 burst key 7 div 2 5 6us NTSC 2 38us
75. nuals Contact MAURITRON TECHNICAL SERVICES 8 Cherry Tree Rd Chinnor Oxon OX9 4QY Tel 01844 351694 Fax 01844 352554 Email enquiries mauritron co uk 13 354 j1 3 35314 50 Y for VCR 50 Y for multiburst def lines amp Fig 11 Digital addition of the BL WH pattern 685 5 31 VIDEO EXT m to N eo p P 5 X lt 2 M multiburst chrominance 697 foc VCR 684 12 C 12 694 luminance s for BAR i 695 909 spa A s98 rg y ume 696 3 414 688 1 314 700 g 689 grey scale i 714 C 690 12 grey scale 691 amp 2 2 50 VCR addition amplifier 886 amp 2K2 2 3 picture 685 4K 2 gt sync pulses 687 21K gt digital signals 5V A 8 different states on the line B 4 Fig 12 Summing and scale factor of patterns and signals 2 2 6 7 Pushbutton WHITE The NAND gate 381 is disabled by low level at pin 2 During the active line time the signal f obtains high level at the summing junction 2P2 resulting in 100 white 2 2 6 8 Pushbutton definition lines grey scale The NAND gates 370 6 377 8 and 368 3 are inhibited by the VCR switch see fig 11 the output level is high By combination of the vertical signals 364 7 and 364 5 the vertical start stop signal for the multiburst oscillator in 368 6 is gene
76. o socket For time base synchronisation of an oscilloscope two signals are available for line or frame triggering comp sync and frame 1 2 TECHNICAL DATA Only data with indicated tolerances or limits are guaranteed data without tolerances are given only for guidance 1 2 1 Test signals CIRCLE white circle on grey background combinable with all test patterns CHECKERBOARD 6x8 squares DOIS 11 15 intersections of crosshatch pattern CROSSHATCH 11 horizontal and 15 vertical lines GREYSCALE combined with staircase signal with 8 identical steps and DEFINITION LINES sinusoidal line frequent multi burst of 0 8 1 8 2 8 3 8 4 8 Mhz 1 2 25 VR COLOUR BAR 100 white signal with burst red green and blue signal selected via sepa rate buttons 75 saturation also complemen tary by combination special test pattern of 4 vertical bars 1 stbar G Y 2rd bar grey Y 3th bar R Y NISC encoded with PAL burst 4 bar B Y The 2 bar and lower part of the screen are for reference pattern with 5 horizontal bars 1 1 6 of screen 100 Y 2 1 6 of screen 2 8 3 1 6 of screen 3 0 MEE 4 1 6 of screen 3 2 MEE 5 2 6 of screen 8 step of Linearly increasing saturati on with 50 Y standard chroma signal with 75 saturation the lower part of the screen 1S used as reference 75 Y Relative Chroma Relative chroma Bar luminance phase amplitude amplitude White 0 75 x Yellow 0 67
77. or positioning of the elements see figs Warming up The instrument may only be adjusted after a warm up time of at least 30 minutes POWER SUPPLY Power consumption e Adjust the instrument to a mains voltage of 220 V by means of a variable transformer e Measure the current consumption Irms lt 85 mA Adjustment to 12 5 V e Connect a digital multimeter to test point 1 TP 1 pin A 2 U 11 e Check the voltage for 12 5 V 0 1 V If necessary readjust with solder bridges X Y Z U 11 Adjustment to 12 5 V e Connect a digital multimeter to TP 2 A 4 U 11 e Check the voltage for 12 5 V 0 1 V If necessary readjust with solder bridges U V W U 11 Adjustment to 5 V e Connect a digital multimeter to TP 3 A 5 U 11 e Check that the voltage is 5 V 0 15 V Checking the stabilisation due to mains fluctuations e Change the mains voltage from 198 V to 242 V a c e Check that there is no influence to the above mentioned voltages Adjustment to 28 V e Connect a digital multimeter to TP 4 15 U 10 e Check that the voltage is 28 V 0 5 V if necessary readjust with 790 U 10 Checking hum voltages unit 11 e Connect an oscilloscope successively to points 0 2 AO and A 4 AO and A 1 A 6 and A 5 e Check that the hum voltages between points AO0 A2is 5mV 415 lt 5bmV 2 0 2 1 lt 10 5 15 10mV 50 4 4 4 4 1 4 4 2 4 4 3 4 4 4 4 4
78. ours cyan R magenta G and yellow B black and white 8 bars fig 16 The colour modulation is performed by means of the colour difference signals R Y and B Y whereby R Y 20 7 R 0 59 0 11 0 3 0 59 0 89 8 The colour difference signals are generated by a resistor matrix fig 16 which is obtained by means of the pulse signals A B C The addition of R Y and B Y results in a term missing the green therefore no green colour component has to be modulated The whole colour information is inherent in the two colour difference signals R Y and B Y Fig 17 shows these signals R Y and B Y which are modulating the colour subcarrier 1 0 0 118 08 0 6 0 3 R 0 4 0 596 0 2 1 4 12 011 B 3B 10 0 8 0 7R 0 6 0 4 0 59 15 02 R Y 1 8 1 6 0 89 CB 5B 1 4 1 2 1 0 O 3R 0 8 0 6 0 59 G 0 4 0 2 B Y Synthesis of the Y R Y B Y signals out of the RGB components RRP signal receiver recognition pulse This pulse is a gap within the line sync pulse see 4 4 7 11 serves for identification from which source signals are sent to the TV receiver VCR and whether the video bandwidth has to be reduced for VCR source or not automatic commutation in modern TV sets The RRP pulse has a width of 530 ns starting 3 3 us after beginning of the sync pulse This pulse is coupled to the normal composite s
79. pl Adjustment check 50 96 and 100 96 75 96 5 96 50 96 50 96 5 96 635 U 10 5096 and 0 25 96 5 96 0 0 5 no colour on connected C T V RW Residual colour carrier and symmetry of the colour modulator Check the residual colour carrier for being minimum If necessary adjust with 800 U 10 809 0 10 e Adjust signal symmetry with 811 U 10 only for rough adjustment Pushbutton DEM control the residual colour carrier and adjust to minimum 56 4 9 COLOUR PATTERN SIGNALS for PAL and NTSC Pushbutton CHROMA AMPL 100 Lock potentiometer VIDEO AMPL to 1V Connect oscilloscope and vectorscope to VIDEO OUT 75 input impedance for vectorscope Pushbutton PAL Burst must be present Check the colour video amplitude pp for 1V 0 05V if necessary repeat 4 8 2 Check video signal range for 0 to gt 1 5Vpp with potentiometer VIDEO AMPL 4 9 1 Monochrome patterns udi T For Service Manuals Contact MAURITRON TECHNICAL SERVICES 8 Cherry Tree Rd Chinnor Oxon OX9 4QY Tel 01844 351694 Fax 01844 352554 Email enquiries mauritron co uk Indicated tolerances on the vectorscope HH field of tolerance for adjustment p 71 extended field of tolerance NTSC 97 4 9 2 Combined colour patterns lt x wee IS Es 7 N DM e J Dr R w C EE lt gt BAR YL 4 4 t b
80. pushbutton fig 11 enables the NAND gates 370 6 377 8 and 368 3 and disables the NAND gates 379 6 and 381 8 The signals 363 6 and 364 6 are combined in 370 6 to a 1 6 V pulse which switches the 100 white to EP2 The following 3 horizontal bars are separated by a one line blanking pulse black luminance This special signal is generated by combination of the signals 363 7 362 5 364 7 and 353 4 and helps to see the limits between the 3 horizontal bars of frequency groups 2 8 3 0 and 3 2 MHz The required composite blanking signal 354 8 signal includes circle blanking pulses if pushbutton circle is depressed is coupled via the NAND gate 369 6 The start stop signal for the VCR frequency groups is generated by combination of 363 6 364 7 and 364 6 in the NAND gates 370 6 and 370 8 This start stop signal is coupled by 368 6 to mutti burst oscillator The corresponding driving signal for the multiburst oscillator is generated in XP1 see fig 9 tH tH tH 351 3 358 3 394 12 B 1 I control signals for PAL switches 394 8 gt P poem pressed 394 12 394 8 Control of the PAL and DEM phase switches Pushbutton COLOUR BAR depressed The resistor matrix for the generation of the R Y and B Y colour difference signals is shown in fig 16 These signals are coupled via capacitors 546 and 544 to the inputs of the modulators The ge neration is done by means of the signals A B C and C in th
81. rated The horizontal start stop signal is given by the signals in fig 9 The composite blanking signal 353 4 stops the luminance during the blanking time Above mentioned signals are combined with the composite blanking signal 354 8 signal includes the circle blanking if circle push button is depressed to the 50 Y signal luminance in the NAND gate 377 11 The current 50 Y is coupled by resistor 691 10 to 282 The grey scale is described in 2 2 4 3 365 9 2V 3 354 11 370 6 see fig 11 C O 354 6 369 12 367 10 5 Fig 13 lt For Service Manuals Contact MAURITRON TECHNICAL SERVICES 8 Cherry Tree Rd Chinnor Oxon OX9 4QY Tel 01844 351694 Fax 01844 352554 Email enquiries mauritron co uk PURITY BLUE 593 RIED bo chrominance 0 16 K56 325 326 fun ne ad Ed 695 Ed o 694 P ld 697 o 686 42 2 691 42K2 687 g amp RN 101378 g amp RN 1015 RN 1007 5128 see fig 11 1 digital signals 381 6 def lines greyscale nnn 688 IS uz ain 689 Sis 473 2 73 a 690 37318 o 12 ak 3 6 blanking with greyscale and 367 5 black circle Greyscale generation luminance for BAR 2 3 picture 50 multib 2 5 V iburst or 50 VCR greyscale 33 2 2 7 Colour part 2 2 7 1 Colour carrier frequency
82. receive H level and thus switch the concerning resistors connected to the summing point ZP1 via 371 single ended to ground By this the summing point being at a dc level of 4 2 V is deprived of current compensated by the input stage In principle this input circuitry of the multiburst oscillator is a current voltage current converter fig 9 in VCR mode the same multiburst oscillator generates the frequency groups for the horizontal bars In rhythm of the picture raster frequency 3 resistors are progressively parallel switched to the summing point via transistors 301 to 303 This current staircase superimposes the bars 2 3 and 4 by frequency groups over the whole TV frame A start and stop signal defines the position of the bars of frequency groups in vertical direction The graduated signals for the greyscale are formed by progressive subtraction of current lige and see bottom of fig 13 defined by resistors 688 to 690 During the active line time the resistors are switched to ground by the 8 4 2 coded signals A B and C 64 5 n Y ie 52 ys 12 ys lt 10 fy pressed i i i 366 3 E 5 I I 015 0 5 045 642 366 4 start multiburst Stop TES MT O Sus oscillator 629 366 6 I T SA 366 11 366 10 RN 6 31 C 7K87
83. ry can be selected For Service Manuals Contact MAURITRON TECHNICAL SERVICES 8 Cherry Tree Rd Chinnor Oxon OX9 4QY Tel 01844 351694 Fax 01844 352554 Email enquiries mauritron co uk 2 4 2 4 1 2 4 2 2 5 43 RF PART fig 35 This part consists of the VHF UHF modulator the RF PRE SELECTION 882 the broadband amplifier and the attenuator RF AMPL VHF UHF modulator fig 32 The VHF UHF modulator 895 consists of an oscillator and a modulator part in one small case Modula tor and oscillator are separated by a partition to prevent high frequency leakage into the modulator The oscillator part consists of three independently adjustable oscillators they are BAND l oscillator with transistor 302 coil 757 and tuner diode 402 double diode BAND IIl oscillator with transistor 303 coil 758 and tuner diode 403 BAND IV V oscillator with transistor 301 coil 756 and tuner diode 401 The HF signal is supplied to the wide band modulator via the coupling networks 513 28 for BAND I 516 627 for BAND III and 508 754 for BAND IV V In principle the wide band modulator consists of IC 351 a double balanced multiplier the matching transformer 751 and the potentiometer 606 for adjustment of the residual carrier Via input 2 IC 351 the carrier is modulated with the video signal by current drive and via input 6 IC 351 AM modulated with the modulated sound carrier At the output a double sideband signal is availa
84. s only of the B Y component but PAL coded The lower third part of the field serves as reference for all bars The necessary R Y and B Y pulses are applied to the colour matrix by the resistors 783 and 784 fig 20 1 Pulse B is one of the driving signals the other one is a NAND combination of pulse C and B In the phase switches 327 328 the colour carrier frequencies ME are switched to the required NTSC or PAL coded mode by means of the AND gates 394 8 and 394 12 y 1 2 12V 12V 12V 12V ios ge x x 2779 t 821 364 7 kad Uu via 393 3 387 3 0 6 Y R Y NTSC coded B Y PAL coded For Service Manuals Contact MAURITRON TECHNICAL SERVICES 8 Cherry Tree Rd Chinnor Oxon OX9 4QY Fig 20 1 Control of the colour modulator for DEM and VCR Tel 01844 351694 Fax 01844 352554 Email enquiries mauritron co uk 40 2 2 8 5 Fig 20 2 2 2 8 6 Pushbutton VCR depressed fig 20 1 The colour saturation staircase of the lower part of the VCR pattern is generated by driving the colour matrix by the signals A B C The R Y modulator gets dc components from resistors 779 781 782 the B Y modulator is inhibited The R Y saturation staircase is combined with a luminance of 50 The NAND gates 391 8 391 12 and 391 6 combine the blanking signals 2 3 V 1 3 V from 364 9 with the A B C signals The depressed VCR
85. stors Numbers starting with a 7 indicate coils and in some cases resistors Numbers starting with a 8 indicate switches and in some cases resistors Overall circuit diagram fig 2 The connections and terminations of the main unit U10 the power supply unit 11 and the controls and sockets of the sub units of unit 10 are shown in the figure 2 The complete single circuit diagrams are shown in the figures 24 26 28 30 32 and 34 For Service Manuals Contact MAURITRON TECHNICAL SERVICES 8 Cherry Tree Rd Chinnor Oxon OX9 4QY Tel 01844 351694 01844 352554 Email enquiries mauritron co uk NOIL2313S 334 288 ccu 79 ees MA II I spupg 568 JHN AHA eum 9 20 puo 3339 HUN uoi maso isa nann AOE OL HUN z uN ASTI ASZ AQ 7 07 166 196 Be 7 o e o a IdWY VWOMNHO LAO 030 3399131 030 43O0 NO H3MOd e Le rm 4 S0 4 INAS 001 09 0 JY 100 NI ra a s 962 62 962 S6c 937 8 3019111950 M31S VM HOlV 111250 GNNOS E wee E onc VENE CREDERE 6 J0j23 9 5 v S898 S ZA AlddNS N3AO0d 100 x
86. t oscilloscope to connector VIDEO OUT e Push buttons WHITE and CHROMA AMPL 0 96 without Burst e Push buttons WHITE and CHROMA AMPL 100 95 with Burst e Check line pulses according to the figure The indicated times should be A 11 9 0 2 us B 1 45 0 15 us 4 75 0 2 us D 0 85 0 3 us E 2 3 0 2 us 4 4 6 Frame pulses composite sync signal e Connect oscilloscope to connector TRIGGER COMP SYNC e Check the comp sync pulses according to the figure The indicated times should be A 160 3 usor 158 89 3 us B 320 6 us C 1 6 0 1 ms field blanking tu tH pe 9 6 11 16 4 4 7 RRP pulses e Push buttons WHITE CHROMA AMPL O0 96 and RRP e Check the RRP pulse according to the figure The indicated time should be A 3 3 0 2 us B 0 53 0 05 us A B e Unlock button RRP e The RRP pulse must disappear 4 4 8 Trigger amplitude e Connect oscilloscope to TRIGGER COMP SYNC e Check the pulse for gt 3 5 V e Connect oscilloscope to TRIGGER FRAME e Check the pulse for gt 3 5 V 4 4 9 When replacing the OQ 5501 check and if necessary change the polarity of the clock pulse instable checkerboard see also Fig 7 51 52 4 5 4 5 1 4 5 2 4 6 4 6 1 VIDEO SIGNALS Video polarity Connect an oscilloscope channel A to TP 8 pin 7 314 U 10 channel B to TP 9 pin 8 314 U 10 Push buttons WHITE and CHROMA AMPL 96 Compare amplitude and level of the complemen
87. tary video signals If necessary readjust with 714 U 10 for pos mod Video amplitude Connect oscilloscope to VIDEO OUT Lock potentiometer VIDEO AMPL to 1 V Push buttons WHITE and CHROMA AMPL O 96 Check amplitude for 2 Vpp 0 06 V synchron pulse amplitude for 600 mVpp If necessary adjust with resistor 747 U 10 in parallel to resistor 739 U 10 Turn potentiometer VIDEO AMPL to 0 V Check video amplitude for lt 20 m Vpp Turn potentiometer VIDEO AMPL to maximum Check video amplitude for 2 9 3 1 Vpp Lock potentiometer VIDEO AMPL to 1 V Connect oscilloscope to VCR out pin 2 For Service Manuals Contact MAURITRON TECHNICAL SERVICES Check amplitude for 2 Vpp 0 06 V 8 Cherry Tree Rd Chinnor Oxon OX9 4QY Tel 01844 351694 Fax 01844 352554 Email enquiries mauritron co uk RF CHECK RF frequency range and amplitude Connect frequency counter and a sampling voltmeter e g WISI via BNC T connector to RF OUT Push button CHECKERBOARD Unlock buttons VIDEO INT EXT and SOUND CARR ON OFF Turn RF AMPL to maximum Check RF frequency and amplitude within the indicated bands for attaining the indicated limits according to the following table 4 6 2 4 7 4 7 1 99 tip touch bands range amplitude adjustment with buttons tolerance range 1 38 90MHz P 628 2 38 90MHz 3 HH 170 250 MHz 4 18mV 4 Hl 170 250 MHz i par 5 IV V 470 820 MHz 6 IV V 470 820 MHz The ba
88. tern Generator PM5519 is used for servicing colour and B W TV sets monitors VCR and VLP sets Alltest signals allow to de termine faults by means of the screen of a TV set or monitor The generator provides 12 different test patterns 7 of them in colour In addition the circle test pattern can be combined with any other test pat tern and appears as white or black circle depending on the brightness of the selected picture The composite colour signal with standard number of lines interlacing and standard coupling of line and subcarrier frequency is available at the vi deo output This video signal of 1 Vpp into a 754 load fixed position is continuously adjustable from 0101 5 Vpp The amplitude of the chroma sig nal including burst is adjustable in steps of 25 from 0 to 100 of standard value The generator can be adapted to other TV systems The amplitude of the RF output signal of the generator 1s continuously va riable This RF signal is modulated with the video signal and the discon nectible 1 kHz modulated sound carrier The carrier frequency of the generator can be tuned to all TV ranges bands and to the intermediate frequency Otip touch buttons are pre settable to any frequency within the TV ranges The preset values are dis played by the individual frequency and range indicator for each selector The RF carrier can be modulated by video and sound signals from external signal sources via the video input and the audi
89. th lead which is connected to the earth contacts of the plug This cable must be connected only to an earthed mains socket to ensure proper earthing The circuit earth po tential of the generator is connected to its chassis the external contacts of the 5 BNC sockets contact 2 of the socket AUDIO and contact 3 of the socket VCR are also connected to the chassis The external contacts must not be used to connect a protective conductor Warning Connect the mains cable plug only to a socket with protective earth contacts This protection must not be made ineffective e g by using an extension cable without earth protection 46 3 4 3 5 3 6 3 7 3 8 ADJUSTING TO MAINS VOLTAGE The generator must be supplied only from AC sources On delivery it is set to a nominal mains voltage of 220 V It can be adapted to mains voltages of 110 V 127 V or 240 V via the voltage switch at the rear panel This switch can be adjusted by means of a coin the set voltage is indicated on the switch For secure operation of the generator the mains voltage must not exceed 10 of the nominal value DISMANTLING THE INSTRUMENT Unplug the mains connector Fold up the handle to the top For this push the buttons of the handle Loosen the central screw at the rear Remove the lead through of the mains cable from the cabinet Dismantle the cabinet KNOBS e Remove the cap from the knob e Unscrew the nut and remove the knob e When replacing t
90. urst amplitude is achieved by 631 U3 29 CIRCLE x y a2 x2 y2 gt r pulse T line integrators 412 30 306 T 663 horizontal 311 664 ellipticity comparator 865 vertical 671 field blank C radius 37 T 308 y Fig 10 1 Forming the circle control pulse field integrators one For Service Manuals Contact once MAURITRON TECHNICAL SERVICES pare 8 Cherry Tree Rd Chinnor m Oxon OX9 4QY Tel 01844 351694 Fax 01844 352554 Email enquiries mauritron co uk wu e parabola picture deflection Fig 10 2 Forming the circle 30 2 2 6 2 2 0 3 2 2 6 4 2 2 0 5 2 2 6 6 Synthesis of the Black White test patterns figs 11 and 12 The test patterns are generated by addition of horizontal and vertical pulse groups circle pulses staircase pulses and the ac coupled multiburst frequencies via resistor 692 U10 Fig 11 shows the connections between the required components for activation and inhibition of the chosen test pattern and the connection to the digital summing junction 7 2 This summing junction 282 is connected to the main summing junction via the resistor 687 010 determining the ampli tude The potential of 283 is 5 V 100 White means no current through resistor 687 U10 and high level at ZP2 Pushbutton checkerboard The gates 379 6 380 6 377 3 see fig 11 are inhibited because of
91. w driver 5 Problem Solution Sound interference into Video Residual carrier amplitude VHF UHF modulator 5322 218 64054 is equipped with additional metal screening sheet from Dec 84 onwards Resistor 716 unit 10 is altered to 13K3 Resistor 716 is paralleled by capacitor 598 OP68 4822 122 31213 resistor 722 is altered to 8K25 see figure Diode 434 in the 1 kHz oscillator unit 10 is paralled by capacitor 597 1 N 4822 122 31175 see figure 598 tkHz OSCILLATOR Some chapters CHECK AND ADJUSTMENT of the service manual are revised 4 4 1 Sub carrier amplitude e Connect oscilloscope with 10 1 probe to TP 5 pin 11 U 1 e Check the sub carrier amplitude 2 5 Vpp f0 5 V e f necessary readjust with 604 4 6 2 Residual RF carrier series L 0 17 onwards new VHF UHF modulator type select abt 200 MHz in the VHF range set attenuator RF AMPL to max output level 10mV select WHITE test pattern connect spectrum analyzer to RF OUT adjust residual carrier with potmeter 606 of the VHF UHF modulator to 10 12 20dB 18 dB from the sync tips to white bar set PM 5519 to abt 623 MHz in the UHF range channel 40 select GREYSCALE test pattern and set the attenuator RF AMPL to abt 1 mV connect CTV receiver to RF OUT check that greyscale pattern is correct modulation not overdriven Otherwise readjust residual carrier with potmeter 606 check that te residual carrier is within
92. ync signal by input 9 of the NAND gate380 8 The RRP pulse is originated out of the sync pulses by means of two one shots pos 350 The start time of 3 3 us is destinated by the time constant of resistor 682 and capacitor 550 the stop time of 3 3 us 530 ns is given by resistor 683 and capacitor 551 37 2 2 8 Synthesis of the chroma signals fig 18 212 61 The chroma modulator fig 18 consists of 2 output coupled four quadrant multiplier 323 and 324 410 The plus and minus signs are pointing out the directions of the input signals with respect to the out puts The colour carrier frequency having passed the phase switches 327 328 are applied to the chroma modulators 323 and 324 whereby the phase shift of f up at the two different modulator inputs is 90 The colour carrier frequencies phase shifted by 90 are multiplied with the colour difference signals Y and B Y in the R Y and B Y modulator The correct amplitude relationship R Y to B Y is adjusted by potmeter 811 the residual colour carrier by 800 and 809 f subcarrier 394 12 U1 11 394 8 PAL DEM phase switches Switches Ut subc PR 8 Bw C Ua Mir 6 U Ut subc 1496 UR chroma amplifier 6 B Y modulator kt For Service Manuals Contact MAURITRON TECHNICAL SERVICES 8 Cherry Tree Rd Chinnor it 796 H 797 Oxon OX9 4QY Tel 01844 351694 Fax 01844 352554 Email enqu

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