Samsung LE32B450C4W bad PSU

[budm]

Re: Samsung LE32B450C4W bad PSU

Yes i have. They are within specs. for example the 1N5408 gave me
max reverse current 2na , breakdown voltage 663mv and capacitance 90pf

Check them in Ohm mode in circuit too and report the readings.

[dick_barton]

Re: Samsung LE32B450C4W bad PSU

Ignore my previous post and fit the replacement when it arrives.

[HellasTechn1]

Re: Samsung LE32B450C4W bad PSU

Check them in Ohm mode in circuit too and report the readings.

ok the DP804 1n4508 on my DMM forward biasd gives me 6.25 Mohm and reverse bias 19 Mohm and rising to 0.L on the circuit.

The DP810 1n4508 on my DMM forward biasd gives me 6.65 Mohm and reverse bias 18 Mohm and rising to 0.L on the circuit.

The DP805 31GF6 on my DMM forward biasd gives me 2.9 Mohm and reverse bias 8.7 on the circuit.

[budm]

Re: Samsung LE32B450C4W bad PSU

ok the DP804 1n4508 on my DMM forward biasd gives me 6.25 Mohm and reverse bias 19 Mohm and rising to 0.L on the circuit.

The DP810 1n4508 on my DMM forward biasd gives me 6.65 Mohm and reverse bias 18 Mohm and rising to 0.L on the circuit.

The DP805 31GF6 on my DMM forward biasd gives me 2.9 Mohm and reverse bias 8.7 on the circuit.

Those reading are done with the diodes still on the board , right?

[HellasTechn1]

Re: Samsung LE32B450C4W bad PSU

Yes that is correct. With diodes still soldered on the PCB.

Well good news today. I soldered the new chip and it works fine !

Thank you all so much for your your fast, well pointed responses !
This forum is a true treasure of knowledge and help !

[dick_barton]

Re: Samsung LE32B450C4W bad PSU

Well done.

[budm]

Re: Samsung LE32B450C4W bad PSU

Thanks for the follow-up.

[HellasTechn1]

Re: Samsung LE32B450C4W bad PSU

Thank you dick_barton, budm, vinceroger69 and all of you people that posted to help me.

Again i say that This forum is a true treasure of knowledge and help. I mean it !