Philips 286NS-05 Service Manual Download Page 27 | Manualshive

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Electrical diagrams and print lay-outs

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Electrical diagrams and print lay-outs

= 0V

L1 140.3V DC

L2 13.6V DC

L3 39V DC

L4

500mV / div DC

10µs / div

L7

100V / div DC

10µs / div

L8

10V / div DC

10µs / div

P2

50V / div DC

5µs / div

P3

100mV / div DC

5µs / div

P1 320V DC

P4

50V / div DC

5µs / div

L6

500mV / div DC

10µs / div

OSC_A1.AI

L5

1V / div DC

10µs / div

P7 10.3V DC

P9 5.4V DC

P8 10.2V DC

S1

1V / div DC

10µs / div

2V / div DC

5ms / div

F1

2V / div DC

5ms / div

P5

2V / div DC

5ms / div

P6

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Summary of Contents for 286NS-05

Page 1: ... lay outs Diagram PWB Power supply Line stage Diagram A1 12 20 21 Tuner IF Diagram A2 13 20 21 Sound Chroma Diagram A3 14 20 21 Controls teletext Diagram A4 15 20 21 CRT panel Diagram B 16 Deflection module 110 degrees Diagram D 17 17 2 x 3W amplifier Diagram C2 19 18 Seperate controls Mains module Diagram J 22 8 Electrical adjustments 23 9 Circuit Description 24 10 Directions for use Exploded vie...

Page 2: ...cal sync 5Hz Picture tube range 25 and 28 Sound output power 3 Watt mono execution 2 X 3 Watt stereo execution TV Systems PAL I PAL BG PAL BG SECAM DK PAL BG SECAM LL Indications On Screen Display OSD green red 1 LED red high intensity red low intensity RC5 and error codes blinking red VCR programs 0 Tuning and operating system VST UV913E IEC VST VHFa 46 102 MHz VHFb 138 224 MHz UHF 471 855 MHz UV...

Page 3: ... 0 5Vrms 1kΩ k 4 Audio v 5 Blue v 6 Audio L 0 5Vrms 10kΩ j 7 Blue 0 7Vpp 75Ω 8 CVBS status 0 1 3V INT 4 5 7V EXT 16 9 9 5 12V EXT 4 3 j 9 Green v 10 11 Green 0 7Vpp 75Ω 12 13 Red v 14 v 15 Red 0 7Vpp 75Ω 16 RGB status 0 0 4V INT 1 3V EXT 75Ω 17 CVBS v 18 CVBS v 19 CVBS 1Vpp 75Ω k 20 CVBS 1Vpp 75Ω j 21 Earth socket ...

Page 4: ...umstances with higher dust grease or moisture levels for example in a kitchen the recommended interval is 1 year The maintenance inspection contains the following actions Execute the above mentioned general repair instruction Clean the power supply and deflection circuitry on the chassis Clean the picture tube panel and the neck of the picture tube 3 3 Warnings 1 ESD All ICs and many other semicon...

Page 5: ...on with the semiconductors in the unit irrespective of the type indication on these semiconductors Figure 3 2 Figure 3 3 V CL 26532098 042 140792 tuner earth tuner aarde la masse du tuner Tuner Erde massa del tuner tierra del sintonizador with aerial signal met antenne signaal avec signal d antenne mit Antennensignal con segnale d antenna con la señal de antena normal condition normaal bedrijf fon...

Page 6: ...per side of the main carrier Position A can be reached by first removing the mains cord from it s fixation then loosen the carrier lips and then pulling the carrier panel for approximately 10 cm Position B can be reached from position A after disconnecting the degaussing cable A stable service position can be created with the left hand side clip on the carrier panel and the cabinet see fig 4 1 765...

Page 7: ... displayed continuously 5 The OSD key will act as search and auto store on the maximum program number 6 Automatic switch off function set switches off after 15 minutes no IDENT will be switched off 7 Hotel mode will be disabled 8 All other functions remain normal controllable Service default alignment menu new option settings are activated immediately 1 Software version of the microprocessor used ...

Page 8: ... mode in the service default alignment mode both the OSD error message and the LED error indication will display the present detected error continuously SYSTEM I UK For a PAL I only set SYSTEM BG LL For a PAL BG SECAM LL set SYSTEM BG DK For a PAL BGI SECAM LL set NATIONAL BRAND MAxxxxx Selects MENU Layout National Brand styling OSD error number servicemenu LED behaviour Error description Possible...

Page 9: ...C7100 The signal of the generator has to be 38 9 MHz Adjustment of the AFC and picture demodulator BAND 1 L France versions only Same story as a only the frequency of the generator has to be 33 9Mhz with positive modulation 8 RF AGC 9 If the picture of a strong local transmitter is reproduced distorted adjust potentiometer R3130 until the picture is undistorted or Connect a pattern generator e g P...

Page 10: ...urrent through winding 2 3 reaches zero Now a new cycle will start The fet will be switched on and all starts over again T dead If the output voltage is too high for example in a low load situation the FET remains off till the output voltage is not to high anymore 9 1 5 Output voltage regulation This is done by the circuit D6501 R3509 TS7502 R3505 R3507 R3510 Transistor TS7502 can only conduct whe...

Page 11: ...el of the signal VFB is adjusted R3402 and C2404 are used to damp oscillation of the deflection coil with his parasitic capacitance The signal NIL from the mC is used to create a non interlaced mode This is done by creating a small DC current through the deflection coil 9 7 110 degrees deflection module For the 25 and 28 sets a 110 degrees module is needed for East West correction This panel is al...

Page 12: ...Input 1 The Sandcastle Pulse has an output current of a few micro amps the amplitudes of the sandcastle pulse components are Burst 5V3 Line Blanking 3V and Frame Blanking 2V 2 The HOR FLYBACK input has a current of 100 300 uA The Horizontal flyback pulse input allows the phase of the flyback pulse to be compared internally with the phase of the horizontal oscillator if the phase is not correct the...

Page 13: ...internal Chroma Decoder is then internally fed with this selected feed see page 11 From here the Chroma is fed to a pre amplifier and then on to the Burst Demodulator the next stage is the R Y and B Y Demodulator The Line and Frame Oscillators also use the 4 43 MHz reference signal available at pin 35 9 9 15 Pin 27 Is used for Chroma standards selection however as these sets are PAL only this pin ...

Page 14: ...10 Direction for use 28 Comet 10 Direction for use ...

Page 15: ...10 Direction for use 29 Comet ...

Page 16: ...10 Direction for use 30 Comet ...

Page 17: ...10 Direction for use 31 Comet ...

Page 18: ...10 Direction for use 32 Comet ...

Page 19: ...10 Direction for use 33 Comet ...

Page 20: ...10 Direction for use 34 Comet ...

Page 21: ...10 Direction for use 35 Comet 10 8 com_119 eps 290698 6 7 11 9 5 4 1 2 3 12 22 19 3 23 10 4 9 8 5 12 13 16 15 14 17 18 11 1 2 com_129 eps 290698 21 20 7 6 ...

Page 22: ...ing the horizontal oscillator in IC7015 6E I2C Digital control bus of the microcomputer IDENT Status signal from IC7015 6B low for no CVBS signal horizontal sync not present high in case CVBS signal is present horizontal sync present from the IF detector IC7015 6B to the µC IF Intermediate frequency signal from the tuner to the AM demodulator IC7125 LF input Low frequency sound signal Input signal...

Page 23: ...e used for locking the vertical oscillator in IC7015 6E VFL Signal to inform the µC that vertical flyback takes place Vg2 Voltage on grid 2 of the picture tube VIP Video Input Processor VOLUME L Control signal from µC but on DC level via RC network for volume control in mono BG sets VOL LEVEL Control signal from µC but on DC level via RC network for volume control in mono multi france sets WST Wor...

Page 24: ...v AC 5ms div D9 0 5V div AC 10ms div D10 2V div AC 5ms div D11 2V div AC 5ms div D12 0 5V div AC 10µs div D13 50mV div AC 10ms div D14 2V div AC 5ms div D15 2V div AC 5ms div D16 0 2V div AC 5ms div D17 0 2V div AC 5ms div D18 2V div AC 5ms div D19 2V div DC 5ms div F1 2V div DC 5ms div P5 2V div DC 5ms div P6 0V V7 Secam Only V9 8V6 DC 10V div DC 20µs div A4 Not present V6 Secam Only 16 CL 765320...

Page 25: ...6 Overview oscillograms 10 Comet ...

Page 26: ...gnal L5 O K Y e s N o C h e c k S u p p 9 S F u s e 1 5 0 2 D 6 5 0 3 I c 7 1 0 0 S w i t c h O N Service default alignment mode Blinks One time Blinks Two times Blinks Three times µ p Error C h e c k Ic 7600 I 2 C B U S Error or blocked E e p r o m Error C h e c k I C 7 6 0 5 L E D Blinks N times Y e s Y e s Y e s N o N o N o N o Y e s N o S o u n d Picture OK C h e c k Voltage 8 S b o n Pin1 Ic7...

Page 27: ...C L4 500mV div DC 10µs div L7 100V div DC 10µs div L8 10V div DC 10µs div P2 50V div DC 5µs div P3 100mV div DC 5µs div P1 320V DC P4 50V div DC 5µs div L6 500mV div DC 10µs div OSC_A1 AI L5 1V div DC 10µs div P7 10 3V DC P9 5 4V DC P8 10 2V DC S1 1V div DC 10µs div 2V div DC 5ms div F1 2V div DC 5ms div P5 2V div DC 5ms div P6 ...

Page 28: ...7 Electrical diagrams and print lay outs 13 Comet I1 50mV div DC 10µs div I2 500mV div AC 10µs div V1 500mV div AC 10µs div OSC_A2 AI 2V div DC 5ms div V2 ...

Page 29: ... 1ms div A3 100mV div AC 1ms div V3 500mV div AC 10µs div V5 20mV div AC 1µs div OSC_A3 AI V12b 0 5V div DC 20µs div V12a 0 5V div DC 20µs div V11b 1V div DC 20µs div V7 Secam Only V9 8V6 DC V11a 1V div DC 20µs div V8a 500mV div DC 10µs div V8c 500mV div DC 10µs div V8b 500mV div DC 10µs div ...

Page 30: ...7 Electrical diagrams and print lay outs 15 Comet 0V C2 1V div DC 0 5µs div C5 500mV div DC 0 5µs div C1 5V DC OSC_A4 AI C3 5V DC C4 5V DC ...

Page 31: ...7 Electrical diagrams and print lay outs 16 Comet 0V V4a 10V div AC 10µs div V4c 10V div AC 10µs div V4b 10V div AC 10µs div OSC_B AI ...

Page 32: ...00 D1 3910 3924 2 3 1 TV D5 0082 1 12 11 2 3928 D2 D4 2911 2912 2913 2914 2915 3929 6906 A K 7907 E B C 2909 2919 3916 3918 5901 1 2 3 4 6904 A K D3 D8 D6 7908 G S D 0040 1 3 2 2905 3907 3908 3909 3923 3925 3926 7904 B E C 2918 3900 3901 3933 6900 A K 7900 E B C D19 TV D12 D12 7901 E B C D17 3905 3906 3913 2 3 1 3927 6901 A K 6907 A K 2900 2901 2902 2906 2908 2916 2917 3904 D11 D14 7902 E B C 7905...

Page 33: ... 1 3240 A 1 3241 A 1 3242 A 1 3243 A 1 3244 A 1 3245 A 1 3246 B 2 3247 A 3 3248 B 2 4202 C 2 4204 C 3 4205 C 1 4207 B 1 4208 C 1 4210 A 1 4211 B 2 5201 A 3 5202 C 1 5203 B 1 5204 C 4 5206 C 3 5207 B 2 5208 B 2 6220 C 1 6221 B 3 6222 C 1 6223 C 1 6224 C 4 6225 C 3 6226 C 5 6227 A 1 6228 A 1 6229 C 5 7201 C 5 7202 C 1 7203 C 1 7204 C 3 7205 B 4 7206 C 1 7207 C 2 7210 A 1 7211 A 2 7212 A 3 7221 C 2 9...

Page 34: ...7 Electrical diagrams and print lay outs 19 Comet CL 86532029_008 eps 240698 ...

Page 35: ...7 Electrical diagrams and print lay outs 20 Comet 1 2 3 4 5 6 7 8 9 10 H G F E D C B A H G F E D C B A 1 2 3 4 5 6 7 8 9 10 ...

Page 36: ...7 Electrical diagrams and print lay outs 21 Comet 1 2 3 4 5 6 7 8 9 10 H G F E D C B A H G F E D C B A 1 2 3 4 5 6 7 8 9 10 ...

Page 37: ...00 G 2 A002 F 3 A001 F 2 9804 H 2 9802 B 3 4 5 1 6 7 2 3 E D C H B A G F E D C H B A G F 4 5 1 6 7 2 3 A003 A020 A011 A014 A018 A019 A015 A013 A001 A012 A016 A010 A009 A008 A007 A006 A005 A004 A017 A17_ A021 A022 A002 9801 9802 GNDC GNDA GNDA GNDA GNDA 1 0042 2 3 4 1 0072 2 3 4 1 0071 R 2 R 3 4 L 5 L 3 1 0066 4 7 5 2 6 0025 1 2 3 4 5 6 100u 2802 100u 2803 9804 9800 1800 1 2 3 4 5 7 8 Headphone 280...

Page 38: ...01 4822 126 13599 3 3nF 10 500V 2802 4822 126 13185 680pF 10 500V 2803 4822 124 41579 10µF 20 50V 2803 4822 126 10002 100nF 20 25V 2808 4822 126 13597 330pF 10 500V 2813 4822 124 41579 10µF 20 50V f 3005 4822 051 20472 4k7 5 0 1W 3006 4822 051 20472 4k7 5 0 1W 3008 4822 116 52219 330Ω 5 0 5W 3009 4822 117 12955 2k7 1 0 1W 0805 3010 4822 117 10833 10k 1 0 1W 3011 4822 051 20472 4k7 5 0 1W 3012 4822...

Page 39: ... 42489 BYD33G 6421 4822 130 42488 BYD33D 6422 4822 130 42488 BYD33D 6423 4822 130 32896 BYD33M 6424 4822 130 42488 BYD33D 6426 4822 130 34145 BZX79 B39 6427 4822 130 42488 BYD33D 6500 4822 130 34233 BZX79 B5V1 6501 4822 130 34173 BZX79 B5V6 6502 4822 130 34281 BZX79 B15 6503 4822 130 32245 BYV10 40 6503 4822 130 42488 BYD33D 6504 4822 130 41487 BYV95C 6504 4822 130 41601 BYV95A 6506 4822 130 70021...

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