Teac Eu-68 free download

File name Teac EU68 ctv.pdf

SERVICE MANUAL EU-68 68cm CTV Effective: JANUARY,2000 EU68SERV TECHNICAL BULLETIN 02-Jun-00 MODEL: PROBLEM: EU-51/80 ST Power supply problem File: EU51-80 chopper tb.doc The chopper transistor Q802 is damaged as a consequence of a fault in D816. This problem normally occurs when a diode type UF5407 is used in the position D816. Instructions Replace damaged components. Use only a diode type BMY36D for the position D816. Regards, Alcides Berta TEAC Australia Pty Ltd. Page 1 of 1 TECHNICAL BULLETIN 26-Jun-00 MODEL: PROBLEM: EU 51 / 66 / 68 / 80 ST CRT output IC protection File: EU51-80 spgap tb.doc This is a tentative solution to avoid damages to the output video amplifier IC901 (TDA6107) caused by electric discharges between electrodes of the CRT. The modification should be applied to units found with damaged video amplifier IC. Instructions Add the following components to the CRT board. Refer to the figure and table below for parts location and specifications. Components information Item Part Number 1 2 3 EUSPARK EUSPARK QDTBOUZ6R2BS Description 300V Spark gap 300V Spark gap Zenner diode 6V2 400 mW From Point G Ground 1-PL901 (Cathode) To Aqua Aqua Ground (Anode) Comments Spark gap devices have no polarity Regards, Alcides Berta TEAC Australia Pty Ltd. Page 1 of 1 1 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 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 Audio right output Audio right input Audio left output Ground AF Ground Blue Audio left input Blue input AV switching input Ground Green Green input Ground Red Ground Blanking Red input Blanking input Ground CVS output Ground CVS input CVS output CVS input Ground SCART 1 (SC050) 0.5Vrms / 1K 0.5Vrms / 10K 0.5Vrms / 1K 0.5Vrms / 10K 0.7Vpp / 75ohm 0-12VDC /10K 0.7Vpp / 75ohm 0.7Vpp / 75ohm 0-0.4VDC, 1-3VDC / 75ohm 1Vpp / 75ohm 1Vpp / 75ohm 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 Audio right output Audio right input Audio left output Ground