I'm Looking For A Part

[lcdman]

Hello All,

I have a part I need to replace on a LG 22" logic/video board. A friend is looking for it and I couldn't absolutely identify it. Contacted Digi-Key, they gave me two possible candidates.

http://search.digikey.com/scripts/Dk...ords=CTX088-ND

http://search.digikey.com/scripts/Dk...ords=CTX877-ND

Perhaps someone could help me narrow down to one? I'll provide a model number if that helps at all?

Thanks As Always
Lcdman

[joshnz]

Re: I'm Looking For A Part

That is a 14.31818 MHZ CRYSTAL
The two digi-key ones have the same load capacitance as the one you have.
as for which one is suited not sure maybe someone here can help.

[Toasty]

Re: I'm Looking For A Part

Without seeing and examining or a drawing or schematic of the circuit, you'll have to get one of each and see which one works.

CTX877-ND - Is for parallel resonant circuits, which require a load capacitance (18pF) in the circuit for the crystal.

CTX088-ND - Is for series circuits which do not need the load capacitance.

.

[lcdman]

Re: I'm Looking For A Part

Hello Again,

Thanks to all so far. The logic/video board is out of a LG W2252TQ. I haven't yet found a schematic for the logic/video pcb. I could try buying both crystals from Digi-Key but would love to just buy one and not both. Does anyone out there have the schematic for just the logic/video board?

Have A Great Day
Lcdman

[jetadm123]

Re: I'm Looking For A Part

Well, both crystals are under $1.00 each and shipping will probably be around $3.00. I can't see much of an excuse not to buy both.

[Toasty]

Re: I'm Looking For A Part

Well, both crystals are under $1.00 each and shipping will probably be around $3.00. I can't see much of an excuse not to buy both.

QFT!

(My point to begin with)

[PlainBill]

Re: I'm Looking For A Part

Hello Again,

Thanks to all so far. The logic/video board is out of a LG W2252TQ. I haven't yet found a schematic for the logic/video pcb. I could try buying both crystals from Digi-Key but would love to just buy one and not both. Does anyone out there have the schematic for just the logic/video board?

Have A Great Day
Lcdman

Post a picture of the board showing the area around the crystal clearly. It should be possible to identify any load capacitors (if present).

PlainBill

[Krankshaft]

Re: I'm Looking For A Part

Don't forget some crystals have the load capacitors in the case making identification more difficult.

The Bob Parker ESR meter is a prime example there is a place for two load capacitors on the board that are unpopulated because the crystal has internal caps.

[PlainBill]

Re: I'm Looking For A Part

Don't forget some crystals have the load capacitors in the case making identification more difficult.

The Bob Parker ESR meter is a prime example there is a place for two load capacitors on the board that are unpopulated because the crystal has internal caps.

In that case, he buys the wrong crystal, and has to reorder.

PlainBill