CE Tech Tips — January 2021

CE Tech Tips — January 2021

Due to the danger and complexity of electronic equipment repair, the following technical tip is intended for professional reference only. Please refer to manufacturer’s recommendations as Encompass does not guarantee the accuracy, reliability or safety of this information.

Hitachi TV, 57F59A
Reason for Service: Vertical distortion at bottom of picture, or Q777 has failed.
Solution: Install deflection Kit X480315. 

LG TV, 47LG50
Reason for Service: Dead, F101 open.
Solution: Found and replaced shorted mosfet in power supply, Q502.  Replacing this and fuse restored normal operation. 

Mitsubishi TV, VS6071
Reason for Service: No vertical.
Solution: Replacing vertical IC fixed set. LA7838S

Samsung TV, UN60F6350AFXZA
Reason for Service: TV will randomly cycle on and off; gets progressively worse.
Solution: Update firmware, and disconnect Wi-Fi module to see if problem goes away.  If so, replace Wi-Fi module.

Samsung TV, LN46C600F3F
Reason for Service: Set powers up with sound, but no backlight.
Solution: Found open cap in power supply, C818, 0.47uF/450V.  Replacing this fixed set.

Sony TV, KDL-26M4000
Reason for Service: Dead
Solution: Replaced cracked IC902, #670889101, and open R904.  10ohm/half W.

Toshiba TV, 46XV645U
Reason for Service: Dead, no power.
Solution: Replaced open R850 in power supply (1.8ohm/5W) and relay.  23146564X.

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