Скачать с ютуб crt tv repair and measuring voltage crt china board - ටීවී බෝඩ් වල නිවැරිදිවvoltage හදුනාගනිමු в хорошем качестве

crt tv repair and measuring voltage crt china board - ටීවී බෝඩ් වල නිවැරිදිවvoltage හදුනාගනිමු

#Measuring_voltage #crt_chaina_bord #how_fix_crt_tv_bord #crt_tv_repair #crt_tv_repair_sinhala_video #tv_repair_sihala_video #tv_repair CRT-TV-Circuit-Board (Made In China Universal Board) DEFECT: Single Vertical Line In The Center POSSIBLE HINTS : 1.) Check first the vertical IC. Some Vertical IC’s may have loose contacts on solder joints on its legs because of the heat and cold condition on its operation. 2.) Check the supply voltage if present in the main vertical section, sometimes 24 volts from the fly back and other supplied by 24v and -24v plus ground. 3.) If the supply voltage is missing, check the line from fly back having 18-24 volts, possible culprit is an open fusible resistor. 4.) Defective yoke, maybe there is a broken or burn part of the coil inside it. 4.) If the supply voltage is present, possible problem is that the Vertical IC is defective or the Vertical Sync coming from the Jungle IC, better to check also the jungle IC in this situation. DEFECT: HORIZONTAL LINE ONLY POSSIBLE HINTS : 1.) Defective yoke, maybe there is a broken or burn part of the coil inside it. 2.) Loose contact connection on one of the legs of the yoke on the main board. 3.) Defective non electrolytic capacitor. DEFECT: NO SOUND POSSIBLE HINTS : 1.) check first your speakers, it is usually the most common culprit after repairing a television with power supply problem based on my repair experience. 2.) Check if the supply voltage for audio ampifier is present, if not check the line. 3.) If the supply voltage is present, try doing a hum test by touching the input of the audio IC, refer to the datasheet to find the input pin of the IC. Replace the audio IC if everything is done. DEFECT : NO POWER POSSIBLE HINTS : 1.) Check first the power cord. 2.) If the power cord is ok, check the fuse ( note the fuse is burnt, don’t replace it right away. Check first the circuit if their is a short on the circuit specially on the primary power section, check all the diodes surrounding the main power IC) 3.) If their is no shorted diode and no short on main IC, now check the Horizontal Output if it is busted or shorted. Please #write in the comment box what you thought about this video thanks for wotching our video Next video coming soon Note: - This channel or I are not responsible for any accidents or damage to the product that may occur to you during any repair work and you have the right to work safely. Thank you 🙏🙏 #සැ:යු :- යම්කිසි අලුවැඩියා කටයුත්තකදී ඔබට ඇතිවන හදිසි අනතුරු හෝ භාන්ඩයට සිදුවන අලාභානි පිලිබදව මෙම නාලිකාව හෝ මා විසින් කිසිදු වගකිමක් දරන්නේ නැති අතර ආරක්ශාසහිතව නිවැරදිව වැඩ කිරීම ඔබ සතුය. ස්තුතියි 🙏🙏