Acer x193w LCD monitor - silver metal tape & replacement caps?

[jmmtsb5]

This LCD Monitor started having problems lately - it would just shut itself off after a short while for no reason, and later, it wouldn't stay on but for a few seconds.

When I disassembled (rather difficult task), I found two bulging caps on the power board (both CapXon 220mF 35v).

Problem #1:
I ordered replacements for all the caps (they are all CapXon) on the power board except for 2: the large cap (120mF, 450v) and a small one (22mF, 50v).
These are the digikey part numbers for the caps I ordered:
(a) 220mF 35v - P13127-ND
(b) 2200mF 10v - P13115-ND
(c) 1000mF 10v - 1189-1072-ND
Are these acceptable for this application, or did I order incorrect ones?
If incorrect, can you please suggest part numbers for proper replacements?

[U]Problem #2[U]:
Both the power board and the "main" board (the one into which the VGA & DVI cords plug) are installed in a "cage" style metal box (shield?) which was inverted and then held onto the back of the LCD panel w/ silver metal tape(?!) along 3 edges of the box. The existing tape was more or less ruined in trying to remove this "box" to get at the power board - is this some sort of special tape (EMI or high heat resistance, etc.), and if so, where would I get some to use to re-assemble the LCD monitor when I complete replacing caps? I'm assuming standard black electrical tape wouldn't hold this "box" on in the high heat on the back of the LCD panel?

This is my first attempt at capacitor replacement, and first post on this forum.

[smason]

Re: Acer x193w LCD monitor - silver metal tape & replacement caps?

For the caps, I would have used something with better ripple ratings, they will probably be ok, if it's your monitor, I'd use them and see how it goes, if it was for a "customer" I'd probably go with better caps. I use Panasonic FM FC and FR series for all of my monitor repairs.

For the tape, I often make a mess of the tape, I'd peel it up the best you can and try to re-use it. It's not really critical, it probably provides some extra RFI shielding to pass emissions standards.

[jmmtsb5]

Re: Acer x193w LCD monitor - silver metal tape & replacement caps?

Thank you for the quick reply.

The monitor is my own for personal use. The total for my capacitor order was only $7.50, so I might just re-order and chalk it up to a learning experience.

As for the tape, the problem is that it has essentially lost its "stickiness" because I peeled it off. I don't think it will support the weight of the "box" and the 2 boards when the "used" tape tries to fasten it to the back of the panel. If the tape gives way, the entire unit (boards + box) will be hanging by the ribbon cable to the inverter. Is there really no place to purchase it? I'd be satisfied if someone could even tell me the technical name for the tape.

Thanks again!

[budm]

Re: Acer x193w LCD monitor - silver metal tape & replacement caps?

I use aluminum duct tape from HD. The back cover also help holding the chassis in place.

[smason]

Re: Acer x193w LCD monitor - silver metal tape & replacement caps?

If the tape isn't re-usable, then what BudM said, the aluminum duct tape would work.
It doesn't have to hold much, the case holds the cage in place, the tape helps keep it in line till the case is assembled.

[budm]

Re: Acer x193w LCD monitor - silver metal tape & replacement caps?

"It doesn't have to hold much, the case holds the cage in place, the tape helps keep it in line till the case is assembled." that is correct.

[jmmtsb5]

Re: Acer x193w LCD monitor - silver metal tape & replacement caps?

smason & budm -

It just so happens I have some of that metallic duct tape from the last time I hooked up our dryer. Who woulda thunk it would be of use for electronics repair!

Thanks again!

I will post before & after pictures of board & assembly after new caps arrive and I affect the repair. Hopefully, it works like a champ after I'm done and I can declare success.

[jmmtsb5]

Re: Acer x193w LCD monitor - silver metal tape & replacement caps?

Sorry to take so long to get back here. I re-ordered caps w/ better ripple current (all Panasonic FM or FR series). Also, since I had no prior experience w/ this, I "practiced" on an Apex DT-250 digital converter box (success!).

The Acer x193w monitor went well also, though I forgot to take "after" photos before I re-assembled it. It was such a pain to get it back together - no way am I taking it apart to take those photos!

Bottom line - it's done and it works!

Thank you for all your assistance.

[budm]

Re: Acer x193w LCD monitor - silver metal tape & replacement caps?

Great job and thanks for the feedback.