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Equipment Repairs => LCD TV forum => Topic started by: dollybingle on January 14, 2011,08:05:42

Title: Toshiba 42WLT66, relays clicking.
Post by: dollybingle on January 14, 2011,08:05:42

Does anybody have any experience of this fault? The power supply is recycling every 2 or 3 secs, just enough for the backlights to light briefly. Occasionally it will stay on for a minute or so. Originally when it came in it would stay on for much longer, once all afternoon. Checked sockets P807 & 9 on the PS for dries and ESRs on PS caps as a matter of routine. I've changed the inverters and I've also changed Q880 on the PS just in case. Poked, prodded and pulled everything. Also unplugged the LVDS board. What's next?

Rgds,     Frank.

Title: Re: Toshiba 42WLT66, relays clicking.
Post by: davenjax on January 14, 2011,08:59:49

hi frank i have heard of a common fault with str6765 regulator ic in toshiba psu's not sure if this set uses it but may be worth checking out symptoms i believe are clicking relay but no power ??? i have a new one here or you can obtain them via ebay rgds dave

Title: Re: Toshiba 42WLT66, relays clicking.
Post by: dollybingle on January 15, 2011,16:48:20

Thanks for reply, Dave. I have already replaced the 6765 (Q880) with no success. I've ordered a signal board from Ebay as the next most likely suspect.

Rgds.   Frank.

Title: Re: Toshiba 42WLT66, relays clicking.
Post by: davenjax on January 15, 2011,17:29:45

hi mate the only other problems iv had with these particular models were the tcon iv had two both duff replaced both and the tvs worked fine after but never had a tcon affect the power ? would be grateful to know the outcome if i remember rightly the tcon panels are fhd-cm

Title: Re: Toshiba 42WLT66, relays clicking.
Post by: dollybingle on January 16, 2011,05:37:00

Hello Dave,

Yes, I suspected the Tcon but dissed it and the relays still clicked.  Maybe the Tcon has to be seen to be good by the protection cct., if the relays clicking is due to a protection device.  I'll let you know after replace the signal board.

Rgds.  Frank.

Title: Re: Toshiba 42WLT66, relays clicking.
Post by: davenjax on January 16, 2011,05:40:45

hi frank ill wait to hear from you good luck mate hope it works out .dave