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#horizontal Philips TV Model: 25PT4423 (L6.2 Chassis)Stuck in standby, LED on, no HTThere may be no 5V to the microprocessor. Check R3509 and D6501. Replace R3509 witha 47k 1 Watt version (4822 053 10473). D6501 is type BZX79B5V6 (4822 130 34173). Check the +150 volt rail, 145V is too low
Sony TV (AE1 Chassis)Field non linearityand short pictureCheck / replace C531 (680uF, 25v), only slightly leaky, but a new one cured the fault
Sony TV Model: KV-M2131U (BE1 Chassis)Intermittent loss of syncronisation, both horizontal and verticalThe surface mounted power transistor on the teletext module requires resoldering. As there is evidence of scorching on the board the use of a more substantial component would be indicated perhaps with small heatsink
Dead with H. output short circuit, replacment blows short againFirst check power area and repair dry joints then change all high voltage (PF value) capacitors in the horizontal section, this fixed the problem
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16 окт 2024