CE Tech Tips — January 2017
CE Professional Tech Tip Sharing
January 2017
**NOTICE**
Due the danger and complexity of electronics repair, the following shared technical tips are 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, 51 UWX20B
Reason for Service: No video, audio or OSD. Turn up screens and you can see some video.
Solution: Check video mute AC Protect and Horz Blank and found Q445 shorted.
Insignia TV, NS-55E560A11
Reason for Service: Dead
Solution: Check the following Schottky diodes on the power PCB: VD838, VD839, VD840, VD841, and replace any defective ones.
Mitsubishi TV, WS55413
Reason for Service: Shuts down when you power on with error 2-2
Solution: On the main board, replaced open fuse F9B01, IC9B02, 270P668020 and D9B07, 264P484030.
Panasonic TV, PT51HX43G
Reason for Service: Set is dead, B+ at 60V
Solution: Replacing D502 fixed the set.
Samsung TV, LN32C540
Reason for Service: Has standby, but nothing works
Solution: Common problem is CM808 in the power supply board. 0.018 polyethylene/800V cap. (18nF) Use a higher voltage.
Sharp TV, LC37D43U
Reason for Service: Won’t power up, no indicator.
Solution: Replaced a defective 150V, 5W zener on the power board. Fixed the set.
Sony TV, KV40XBR800
Reason for Service: Dead or shuts down when plugged in, 6 blink code.
Solution: Replacing C6556 fixed the set. 33uV/160V.
Vizio TV, GV47LFHDTV10A
Reason for Service: Has backlight but no video.
Solution: Found U10 on the main board was defective.
Comments (2)
I’m always interested in diagnostic faults of any TV set. The new technology is far simpler than previous chassis that the writer has been involved with over the past thirty years ir so. What with no high voltage to worry about a central power supply giving constant voltage rather than point to point Cercuit tracing makes diagnostics much simpler. Keep up the good work I’m involved with the new techno log and live the work even at my ripe old age if 78. Thanks Bernard
Interestingly, there remains a need for repair for all kinds of model years. Even more intriguing is the new set Samsung debuted at this year’s Consumer Electronics Show. The display is paper thin and all the components are housed within a sound bar. Hopefully this will open more opportunities for servicers!