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UNIVERSUM FT81228
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of UNIVERSUM FT81228 Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

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Text excerpt from page 3 (click to view)
DO NOT CHANGE ANY MODULE UNLESS THE SET IS SWITCH OFF The mains supply side of the switch mode power supply transformer is live. Use an isolating transformer. The receivers fulfill completely the safety requirements. Safety precautions: Servicing of this TV should only be carried out by a qualified person. - Components marked with the warning symbol on the circuit diagram are critical for safety and must only be replaced with an identical component. - Power resistor and fusable resistors must be mounted in an identical manner to the original component. - When servicing this TV, check that the EHT does not exceed 26kV. TV Set switched off: Make short-circuit between HV-CRT clip and CRT ground layer. Short C804 (150mF) before changing IC802 or other components in primary side of SMPS. Measurements: Voltage readings and oscilloscope traces are measured under following conditions. Antenna signal 60dB from colourbar generator. (100% white, 75% colour saturation) Brightness, contrast, colour set for a normal picture. Mains supply, 220VAC, 50Hz.

PERI-TV SOCKET

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SCART 1 (SC050) Audio right output 0.5Vrms / 1K Audio right input 0.5Vrms / 10K Audio left output 0.5Vrms / 1K Ground AF Ground Blue Audio left input 0.5Vrms / 10K Blue input 0.7Vpp / 75ohm AV switching input 0-12VDC /10K Ground Green Green input 0.7Vpp / 75ohm Ground Red Ground Blanking Red input 0.7Vpp / 75ohm Blanking input 0-0.4VDC, 1-3VDC / 75ohm Ground CVS output Ground CVS input CVS output 1Vpp / 75ohm CVS input 1Vpp / 75ohm Ground

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

SCART 2 (SC051) Audio right output 0.5Vrms / 1K Audio right input 0.5Vrms / 10K Audio left output 0.5Vrms / 1K Ground AF Ground Blue Audio left input 0.5Vrms / 10K Blue input 0.7Vpp / 75ohm AV switching input 0-12VDC /10K Ground Green Ground Red Ground Blanking Ground CVS output Ground CVS input CVS output 1Vpp / 75ohm CVS input 1Vpp / 75ohm Ground

11Ak41 is a 100Hz flicker free colour television capable of driving 28Â4:3/16:9, 33Â4:3 and 29Â4:3 real flat picture tubes. The chassis is capable of operation in PAL, SECAM, NTSC (playback) colour standards and multiple transmission standards as B/G, D/K, I/IÂ, and L/L´. Sound system output is supplying 12W (10%THD) for left, right and center outputs of 8ohm speakers, and 2 x 7W for surround outputs of 2 x 4ohm speakers, connected in series. TV supports the level 1.5 teletext standard. It is possible to decode transmissions including high graphical data. The chassis is equipped with one full EuroScart, one other SCART for AV input/output, one front-AV input, one back-AV output, one headphone output, one SVHS input (via SCART and SVHS connector), one VGA input, two external speaker outputs (left and right), one centre speaker output, and one surround speaker output for two speakers in series.
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INTRODUCTION

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