بورد براد LG مع صانعة ثلج

فنيين

ليس بالضرورة أن يكون ارتفاع التوتر سببا للاعطال...بورد براد LG مع صانعة ثلج

العطل :
عدم إقلاع :
بالفحص الأولى تبن احتراق محول التغذية للبورد الرئيسي وبالتالي لا يعمل شيء في البراد
العمل :
بمان ان المحول المحترق يتالف من دارتين في الثانوي للحصول على جهدي التغذية الأساسيين 5v و 12v والمحل غير متوفر في السوق وحتى لو توفر فلا ينفع لانه من الألمنيوم ولا يدوم اكثر من شهرين....
لذا كان الخيار الصحيح تركيب دارة تغذية بديلك
تبين الصورة الدارة البديلة
قبل تركيب الدارة كان لابد من اختبار الدارة ككل والفحص تبين وجود شورت على IC ULN ويدل على ذلك احمرار البورد حوالي الIC.
تم الاستبدال والتجريب.
اخوكم ابو انس

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