CE Tech Tips –August 2020
**NOTICE**
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.
Hisense TV, 48H5
Reason for Service: Dead
Solution: Found couple of shorted diodes on power board, replaced whole power board.
Hitachi TV, 53SDX01B
Reason for Service: HV comes up, then set shuts down
Solution: Pin 1 of ip01 was 0 volts because dp14 was leaky. Replacing fixed set.
Magnavox TV, 47MF437B
Reason for Service: At power on, set chirps but will not start.
Solution: Replaced several bulged caps and Z902 and Z904 were defective. P6KE120A. Replacing these fixed the set.
Philips TV, 46PFL3908/F7
Reason for Service: Erratic operation
Solution: Bulletin: Check pin 4 of CN3105 on digital main board for 3.3 V with no keys on function board pressed. If voltage less than 3.3V, unplug keyboard from IR board. If voltage returns to 3.3V, replace function board. If it does not, unplug CN3105. If voltage returns to 3.3V, replace IR board. If problem continues, replace digital main board.
Samsung TV, LN40A500T1FXZA
Reason for Service: Power cycles with audible screech sound
Solution: Replaced C102. 47uF/6.3V ceramic, surface mount, blue box.
Toshiba TV, 46XV640U
Reason for Service: No video or OSD, but audio and backlights work
Solution: Found bad SM cap on main board, C606, 22uF/16V.
Westinghouse TV, EW32S5KW
Reason for Service: Cycling red, green, blue, black. Can’t turn set off.
Solution: Set in test mode. Press Exit on original remote.
