Technika lcd32-207

[sordids999]

Hi guys

got this tv it will be ok for about 40 minutes then will shut itself off

upon testing the voltages all are low

main cap is 335 volts
also cant see any caps swollen

24 volts are 22.5 volts
5 volts are 3.7 volts
and so on PSU is 17PW20.1

[ReeceyBurger123]

Re: Technika lcd32-207

Hi guys

got this tv it will be ok for about 40 minutes then will shut itself off

upon testing the voltages all are low

main cap is 335 volts
also cant see any caps swollen

24 volts are 22.5 volts
5 volts are 3.7 volts
and so on PSU is 17PW20.1

Sounds like the pfc isnt working and is causing voltage drop, I have a tonne of vestel 17pw20 power boards if you would like me to send you one as its easier just to replace it.

[ReeceyBurger123]

Re: Technika lcd32-207

The reason why its shutting is because the motherboard or inverter is detecting voltage drop and is triggering the psu to shutdown, Im all but sure that the psu is at fault.

[tom66]

Re: Technika lcd32-207

If the cap voltage stays at 335V when the set is running the PFC circuit is bad, this will cause the set to fail to turn on sometimes or intermittently turn off while running. Replacing or repairing the PSU would fix this.

[sordids999]

Re: Technika lcd32-207

thanks guys

[ReeceyBurger123]

Re: Technika lcd32-207

thanks guys

Your welcome, are you going to replace it or repair it ?

[sordids999]

Re: Technika lcd32-207

I have a spare so ill replace thanks

[Alastair E]

Re: Technika lcd32-207

IF you look at the underside of the PSU, There's three resistors in a diagonal 'row'

These go dry-jointed making the sets intermittent shut-down.

[sordids999]

Re: Technika lcd32-207

thanks alastair ill look

[ReeceyBurger123]

Re: Technika lcd32-207

Did you get the set working in the end ?

[sordids999]

Re: Technika lcd32-207

yes m8 sorry meant to update the thread i replaced the psu

[ReeceyBurger123]

Re: Technika lcd32-207

yes m8 sorry meant to update the thread i replaced the psu

Ok is the set working fine and is the pfc on that psu running now ?