HUMAX HDR Sat Receiver Resistor Value

[nogger]

Hi all, i have a Humax HDR PVR in where the PSU has blown.

The STR-W6252 main PWM chip has blown a leg off & a resistor that is connected to pin 3 (source & overcurrent protection pin) is o/c. I'm having trouble confirming it's value & hope someone may know on here. It seems to be a 5 band resistor but checking the banding out on several of the online calculators nothing seems to match up. Bearing in mind discolouration due to heat etc the colours are : Orange,Green,Grey (or Silver ?),Gold & then right on the end spaced further away from the others a Black band. Is it 0.35,3.5,35 or what ?

Any help mucho appreciated.

Graham

[budm]

Re: HUMAX HDR Sat Receiver Resistor Value

More likely to be 0.35 Ohm since it is for the Source resistor, and per spec of the IC, it does not take much voltage drop on this resistor to trip the over current protection.

[nogger]

Re: HUMAX HDR Sat Receiver Resistor Value

Thanks budm, i think you are probably right. Had a look at teh burnt resistor agai today , managed to chip off a little of the enamel vovering where it had gone open & using a meter tpo measure from each end to the break (like you wold with a potentiometer) i measure approx 0.3 & 0.1 form the other end.

Next problem where to find such a value in the UK, it's going to be a nearest value i think.

Cheers
Graham

[budm]

Re: HUMAX HDR Sat Receiver Resistor Value

If the value is too high, then it will trip too early with lower currect than they had in mind.