Philips_PM5519_维修电路原理图.pdf

Colour TV pattern generator PM 5519 9452 055 19003 Service manual 9499 525 00711 870501 /4 Industrial 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 31 175 see figure. - Some chapters CHECK AND ADJUSTMENT of the service manual are revised: 4.4.1. Sub-carrier amplitude Connect oscilloscope with 10 : 1 probe to TP 5, pin 11/U 1. Check the sub-carrier amplitude: 2.5 Vpp f0.5 V. If 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 (10 mV). - select WHITE test pattern - connect spectrum analyzer* to RF OUT - adjust residual carrier with potmeter 606 of the VHF/UHF-modulator to 10 % . 12 % (20 dB . 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 10 mV p p (synchronizing level) continuously 60dB AM negative (or positive, selectable by solder link); modulation w i l l take place on IF. This modulated signal is then mixed up on RF. Internal or external modulation selectable by means of push-button for VCR (rear panel) DC, mean value 1.8 V BNC socket (front panel) AC 1 Vpp into a load of 75R (fixed position of VIDEO AMPL control) 0 - 1.5 Vp p, continuously adjustable, into a load of positive BNC connector (front panel) positive RadioFans.CN 收音机爱 好者资料库 1.2.4. Sound p a r t - Sound c a r r i e r Frequency Tolerance - Sound modulation I n t e r n a l signal - FM sweep - AM modulation depth External signal - Bandwidth - Preemphasis - Sound input Input impedance Max. permissible voltage - Sound s e l e c t o r 1.2.5. Sync. p a r t Line frequency - Tolerance - Line sync. signal - Lines / f i e l d Field frequency - F i e l d sync. signal RRP (Receiver Recogni- t i o n Pulse) - Sync. outputs Output s i g n a l 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 t o standard value <0.2% FM ( o r AM, selectable by solder l i n k ) 1 KHz s i n e wave (40+-5) kHz with 5.5 MHz; s l i g h t l y d i f f e r e n t with other c a r r i e r frequencies (30+-5) % 0.2 Vrms r e s u l t s i n the same modulation depth a s f o r l n t e r n a l signal 100 H z - 10 KHz 50 p s (can be interrupted) D I N connector ( r e a r panel) 0.5 M R c a r r i e r ON/OFF modulation ON/OFF modulation 1 kHz/external 15625 Hz o r 15734 Hz, adjusted t o standard value 0.05% according t o standards CCIR and R T M A 312,5 lines for f line = 15625Hz or 262,5 lines for f line = 15734 Hz 50Hz for f line =1 5 6 2 5 H z o r 60 Hz f o r f 15734 Hz l i n e according t o standards (with preequalizing and postequalizing pulses) V C R i d e n t i f i c a t i o n In the synchronous pulse, selectable with button on f r o n t panel 2 B N C connectors ( f r o n t panel) 1 ) C O M P - S Y N C 2) FRAME 2 4 V 15 k R negative D C ( d i g i t a l l e v e l ) +5 V and -1 V RadioFans.CN 收音机爱 好者资料库 642296 1.2.6. Chroma p a r t Systems Subcarrier frequency PAL according t o TV systems I,G o r M; NTSC. (delivered according t o standards) 4.433 619 MHz f o r PAL G and I 3.582 056 MHZ f o r PAL N 3.575 611 M H z f o r PAL M 3 579 545 M H z f o r NTSC -6 o - Tolerance f5.10 (+5.+40 C) Burst - Burst phase according t o standards; contained i n a l l t e s t p a t t e r n s 0 135 and 225O f o r PAL, 180 for NTSC Amplitude burst and chroma amplitude adjustable i n steps - Attenuation 0%, 25%, 50%, 75% 100% selected by seperate o r combined push-buttons 0 Tolerance of chroma angle 23 1.2.7. Power supply Mains voltage - Tolerance Mains frequency - Tolerance 110 V, 127 V, 220 V, 240 V externally switched-over +10% Power consumption 18 Watt 1.2.8. Environmental conditions For Service Manuals Contact MAURITRON TECHNICAL SERVICES 8 Cherry Tree Rd, Chinnor Oxon OX9 4QY Tel:- 01844-351694 Fax:- 01844-352554 Email: enquiriesmauritron.w.uk 0 Reference temperature + 2 3 C Nominal operating +5 t o +40 C temperature 0 Limits For storage and -40 t o +70 C transportation This generator conforms t o VDE 0411, class I, protective e a r t h connection. 1.2.9. Dimensions (over a l l ) - - p Height Width Depth Weight 1.3. ACCESSORIES 140 mm 305 mm 300 mm approx. 4.5 kg Supplied with t h e instrument: P M 9538 Connection Cable BNC - TV connector, 75 Ohm Operating manual Optional : P M 9539 Connection Cable B N C - impedance transformer, 75 - 300 Ohm P M 9075 Connection Cable BNC - BNC 75 Ohm Service manual RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库