Question about Televison & Video
Watching TV then 'plop' it died. No Standby LED.
Fuses OK (I am an EX broadcast TV Engineer at BBC / ITN)
PSU SEEMS OK as it produces 9 volts on some outputs (but no standby LED)
Unable to say if 9 volts should be 5v or 25 volts.
Unable to tell if there should be more than 1 output.
No evidence of heat, it smells like new. AC input and front end seems OK as PSU EM radiation can be detected from several feet away AND there is an output (of sorts) of 9 volts.
Technika is apparently made for TESCO and they claim the set is unrepairable and unsupportable (Good advert)
I suspect PSU but this is anonymous with no legends to identify OEM.
IF I had a circuit, I COULD fix it.
I do not suspect dried electrolytics as these typically prevent start up. Once running, the values can be wildly off.... At least that is my experience with SMPSU's.
It COULD be another part of the set but I'm drawn back to the standby LED (Which works if powered seperately).
I'm not aware that any fault elsewhere could cause the Standy LED to NOT light so we get back to the PSU.
Set is very clean and JUST over a year old.
Tesco don't want to know.
I even tried my local TV repair man (I gave up fixing stuff a while back) and even he says TV is a Crock without a circuit.
Any suggestions, which might be "Take it to the tip".
I made my living fixing VERY expensive kit used in TV Broadcasting... I don't like throwing stuff away for the sake of a few pounds of parts.
Rick from Bures
I know the cause of the fault is R983 - it appears to be a pullup resistor that kickstars the PSU. If you look you will find its slightly burnt. I dont know the value of this resistor. But if you connect a 60w mains lamp in place of the resistor the standby light will light then can start the set by pressing one of the buttons on the side of the set. If anybody knows the value please let us know. The part will only be pennies. Keith
Posted on Dec 19, 2009
Sounds like its a power supply problem im not sure what its called but a component in the back that helps run the power supply may be burnt out probly cost 100+ to get it fixed. dont bother with technika tv every where has the same problem. turning it on and of or leaving off for a few hours just temp fix eventually the component will burn out completly
Posted on Sep 04, 2009
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Posted on Jan 02, 2017
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