Dead Sammy - LE26B450C4W

[AlbertRoss]

Re: Dead Sammy - LE26B450C4W

Must have checked this PSU a dozen times and yet I've just found some bad zener diodes. Similar problem as member Mootink had with his. His bad diodes were ZD804, DM852 and ZM804 and mine are ZM801 (IN4740AS) and ZM804 (IN4746A)

Managed to find the IN4746A on e-Bay but, unable to find the IN4740AS anywhere!

Just wondering where other members source there parts from?

[selldoor]

Re: Dead Sammy - LE26B450C4W

Think you are searching for alpha I Nxxxxx whereas I think it is Numeric 1 Nxxxxx

[AlbertRoss]

Re: Dead Sammy - LE26B450C4W

Think I know what you mean? I could use the IN4746A and same to replace the IN4740AS?

[tom66]

Re: Dead Sammy - LE26B450C4W

Think I know what you mean? I could use the IN4746A and same to replace the IN4740AS?

No, IN4746A -> 1N4746A
etc.

[selldoor]

Re: Dead Sammy - LE26B450C4W

Think I know what you mean? I could use the IN4746A and same to replace the IN4740AS?

NO - I mean you are searching on ebay for IN4746A
.......................... and it should be perhaps 1N4746A

There are others I think would do - if you look at the datasheet then you will see the difference between the 4746 and 4740 and you can then search for a 18v 1w zener or whatever.

These might do 10v 1w http://cpc.farnell.com/nxp/bzv85-c10...t=zener+10v+1w

[ben7]

Re: Dead Sammy - LE26B450C4W

If you can't decide on what replacement to get, I suggest getting any type of 18v 1W zener.

[vinceroger69]

Re: Dead Sammy - LE26B450C4W

Must have checked this PSU a dozen times and yet I've just found some bad zener diodes. Similar problem as member Mootink had with his. His bad diodes were ZD804, DM852 and ZM804 and mine are ZM801 (IN4740AS) and ZM804 (IN4746A)

Managed to find the IN4746A on e-Bay but, unable to find the IN4740AS anywhere!

Just wondering where other members source there parts from?

so your looking for the IN4740AS you have managed to find the IN4746A already yourself? if so i have searched and it seems the IN4740AS maybee obsoleet so maybe you can use the IN4740A thats on uk ebay http://www.ebay.co.uk/itm/VISHAY-SEM...item3a70f0a9e2
a little pricely for 1 though

[AlbertRoss]

Re: Dead Sammy - LE26B450C4W

Sammy has come back to life with the help of a zener diode - 1N4740AS 10V 1.3W (ZM801) Has a different looking case to the original but works. Photos not to clear, even on macro setting but, as you can see, I now have a steady 5.16V on STBY-5.3 pin 02#

Amazes me how one cheap diode can take out a t.v!

Thanks for the time and help guys!

[tom66]

Re: Dead Sammy - LE26B450C4W

Very cool! Looks like a nice TV too.

[AlbertRoss]

Re: Dead Sammy - LE26B450C4W

The guy I bought it from said it's not been taken apart etc,. but when I got it there was a screw missing from the rear cover so I was expecting the worse, therefore, supprised to see it had a good picture when I got powered up.

Mind you, I bought it off e-Bay so, I suppose you have to take a chance?

[AlbertRoss]

Re: Dead Sammy - LE26B450C4W

Sammy has come back to life with the help of a zener diode - 1N4740AS 10V 1.3W (ZM801) Has a different looking case to the original but works. Photos not to clear, even on macro setting but, as you can see, I now have a steady 5.06V on STBY-5.3 pin 02#

Amazes me how one cheap diode can take out a t.v!

Thanks for the time and help guys!

[retiredcaps]

Re: Dead Sammy - LE26B450C4W

Amazes me how one cheap diode can take out a t.v!

Nice Fluke automotive multimeter. One retiredcaps' bonus point and good job on the repair.