أشرف عثمان المدير العام
الأعلام : عدد المساهمات : 2402 تاريخ التسجيل : 16/06/2010 العمر : 63
| موضوع: أعطال وصيانة تليفزيون -Repair-TV- [PATRIOT] الأحد يوليو 10, 2011 4:07 am | |
| Tw. PATRIOT KM-1412, chassis JM-2118P. Asserted defect: not included. When you turn on power indicator lights up green as well as at the start. However, no reaction on the remote or the keyboard is not, and high image either. UPS - flyback converter for a blocking oscillator, the transistors used 2SA1020/2SC3807/2SD1710. The test revealed - all output voltages are too low in PD is approximately two times. + B = 65v. instead of 110V. With detailed verification of all elements of BP was found defective capacitor 2n2 (clay) in the opto-coupler control circuit (see figure). Leakage when voltage is applied. Positional number is irrelevant because in different chassis can be denoted differently. [ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذا الرابط]Patriot KM-2136 chassis JM-2118P Not included when a voltage greater than 220V, tries to turn on and immediately goes to the defense. In the leakage transistor V501 (A1020) _________________
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