Daytek F19AH 2 seconds to black.

[smason]

Last one on the freebie pile.

Seemed easy to disassemble, probably 'cause someone's been in here before.

Not much fun to get the boards out lotsa cables.

Visual inspection looks good. Caps look good, board is really clean, no heat marks and no signs of anything but factory solder.

Tried my 2 known good bulbs on one side, they light, 2 seconds to black.
Other side, they barely light.
Odd -- they glow at the end, get to about 2 inches, then go black. No arcing sparking or hissing.

It has one of those dual transformers on one core. Primaries both measure about 1.2 ohms.
1 secondary is 785 ohms other is 164 in-circuit.

Guess I'm looking for another transformer.

[retiredcaps]

Re: Daytek F19AH 2 seconds to black.

Guess I'm looking for another transformer.

Part number?

[smason]

Re: Daytek F19AH 2 seconds to black.

Part number?

had to get my glasses AND a flashlight. Sucks to get old...

looks like 5304-1602-0
LSE 050949

I'll remove it and measure out of circuit, but it's unlikely that anything else would cause the different readings.

[retiredcaps]

Re: Daytek F19AH 2 seconds to black.

looks like 5304-1602-0
LSE 050949

I'll remove it and measure out of circuit, but it's unlikely that anything else would cause the different readings.

That part number looks like it matches this picture

https://www.badcaps.net/forum/attach...6&d=1274202051

at the other F19AH thread.

I agree that it is likely bad "in circuit".

Getting the exact part might be hard. This Pegger couldn't find one

http://winnipeg.canadianlisted.com/c...nt_330994.html

You might want to try an "equivalent" transformer that has 785 ohms for a reading? Look at

http://lcdparts.net/T.aspx

and see which one matches. Then search on ebay.ca for a possibly lower cost?

[smason]

Re: Daytek F19AH 2 seconds to black.

That part number looks like it matches this picture
https://www.badcaps.net/forum/attach...6&d=1274202051

at the other F19AH thread.

Yes looks like the same part. I'll have a look at that site and find something close, unless one of my broken panel parts donors has one (unlikely)

[smason]

Re: Daytek F19AH 2 seconds to black.

Had an Acer 1916 laying around that has a bad panel component. It's inverter transfomer is the same size/layout, but measures 900 ohms on the secondaries.
Wonder if I should try it...

[jetadm123]

Re: Daytek F19AH 2 seconds to black.

Had an Acer 1916 laying around that has a bad panel component. It's inverter transfomer is the same size/layout, but measures 900 ohms on the secondaries.
Wonder if I should try it...

If you do try, use the CCFL's from the acer in case the transformer shorts and causes a voltage spike......