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File name Elemis885_TelestarPT92.pdf

SERVICE MANUAL PT92 CHASSIS Modification reserved PT-92 Chassis Service Manual CONTENTS PAGE 1.Technical Data 2. Recommendation for service repairs 3. Handling of MOS chip components 4. X-Ray radiation precaution 5. Service Menu 6. Specification of the connector (Euroscart) 7. Component descriptions 8. Exploded view 9. Block Diagrams 10. Fault tracing diagram-power supply 11. Power Supply circuit diagram 12. Troubleshooting guide for main PCB 13. Descriptions of the integrated circuits TDA16846 TDA935X TDA9875A TDA9870A TDA24C16 TDA8351 TDA8356 TDA2616 TDA2615 TDA7056 TDA7057AQ TDA7050 TDA6107Q TCDT1100 TDA9830 TDA7710 BU2508AF BU508DF SPP03N60S5 SPP04N60S5 SMPS IC UOC IC TV SOUND IC (STEREO) TV SOUND IC (G. STEREO) EEPROM VERTICAL IC (110O) VERTICAL IC (90O) STEREO AUDIO AMPLIFIER (110O) STEREO AUDIO AMPLIFIER (90O) MONO AUDIO AMPLIFIER (90O) HP AMPLIFIER HP AMPLIFIER VIDEO OUTPUT AMPLIFIER OPTO COUPLER TV SOUND AM DEMODULATOR DOLBY PRO LOGIC SURROUND HORIZONTAL TRANSISTOR (110O) HORIZONTAL TRANSISTOR (90O) SMPS MOSFET (90O) SMPS MOSFET (110O) 4 5 5 5 6 9 10 11 14 17 18 19 20 24 31 38 48 50 54 58 60 63 65 67 70 72 74 78 83 86 89 91 93 96 97 113 14. 15. 16. 17. Dolby and secam L mono board and circuits diagrams Oscilloscope shapes Chassis replacement part list Main Circuit 3 PT-92 Chassis Service Manual TECHNICAL DATA CRT PANEL Visible Picture Deflection Angle Vertical Frequency Horizontal Frequency 47 cm / 50 cm / 66 cm 90o / 110o 50Hz 15.625Hz ELECTRONIC Program Number Teletext Tuner TV System Music Power 100+AV Flof text Cable tuner - 8 MHz spacing for Hyper Band European CCIR system 110o 2x8 Watt Rms 10% distortion 90o 2x4 Watt Rms 10% distortion CONNECTIONS Euro AV Socket Include MAIN STAGE Mains Voltage Mains Frequency Power Consumption In Stby Mode 165-260VAC 50Hz 110o 126W; 90o 75W; 110o 8 Watt 90o 5 Watt 4 PT-92 Chassis Service Manual RECOMMENDATION FOR SERVICE REPAIRS 1- Use only original spare parts. Only use components with the same specifications for replacement. 2- Original fuse value only should be used. 3- Main leads and connecting leads should be checked for external damage before connection. Check the insulation. 4- Parts contributing to the safety of the product must not be damaged or obviously unsuitable. This is valid especially for insulators and insulating parts. 5- Thermally loaded solder pads are to be sucked off and re-soldered. 6- Ensure that the ventilation slots are not obstructed. 7- Potentials as high as 25 KV are present when this receiver is operating. Operation of the receiver outside the cabinet or with back cover removed involve a shock hazard from the receiver. Servicing should not be attempted by anyone who is not thoroughly familiar with the precautions necessary when working on high voltage equipment. Perfectly discharge the high potential of the picture tube before handling the tube. The picture tube is highly evacuated and if broken. Glass fragments will be violently expelled. Always disc