Westinghouse LCM22W2 Help (DAC-19M009)

[retiredcaps]

Re: Westinghouse LCM22W2 Help (DAC-19M009)

I am working on the motherboard of the same monitor and all this info is really helping. I have 3 bulging caps. I am hoping this forum will help me figure out what I need exactly and how to replace it.

The picture of the motherboard is a bit small so we can't read the caps, but you can.

List the uF, V, height, and diamter for each cap and its location.

For example

C123 - 1000uF, 16V, 10mm height, 16 mm diameter

Also, list where you live so we can suggest a suitable supplier.

To replace caps, you unsolder the old cap and solder in the new cap (make sure to get the polarity correct).

[buzzbolt]

Re: Westinghouse LCM22W2 Help (DAC-19M009)

2 of them are: Capxon 21mm high x 10.2mm diameter / 1000uF / 25v
1 is: Capxon 21mm high x 13.2mm diameter/ 2200uF/ 10v

I live in Waco Tx.
76705

[retiredcaps]

Re: Westinghouse LCM22W2 Help (DAC-19M009)

You might as well replace the other caps in between the heat sinks as they are likely been subjected to a lot of heat from the transistors.

In fact, most here will suggest you replace all the caps due to age, heat, and possibly suspect brands.

Since you live in the USA, most on this forum like ordering from digikey or mouser (or here).

The part numbers for digikey are

Capxon 21mm high x 10.2mm diameter / 1000uF / 25v
=================================================

UCC KMG 10.00mm x 20.00mm

http://search.digikey.com/scripts/Dk...me=565-1311-ND

- note this is one of the few caps that fit the dimensions you list above


Capxon 21mm high x 13.2mm diameter/ 2200uF/ 10v
===============================================

Panasonic FM 12.5mm x 20.00mm

http://search.digikey.com/scripts/Dk...name=P12357-ND

2 of them are: Capxon 21mm high x 10.2mm diameter / 1000uF / 25v
1 is: Capxon 21mm high x 13.2mm diameter/ 2200uF/ 10v

[rseery]

Re: Westinghouse LCM22W2 Help (DAC-19M009)

Ok, so provided my lead spacing is correct, here's what I'm looking at ordering:

(1) 400v 120uF - Still searching... - United Chemi-con makes the exact sized one I need, but in 350v!

I am doing the same repair. What did you finally decide on for the 400v 120uF? Or did you decide to leave it alone? Also, if you have completed the repair, did it work?

Thanks for all the work and for documenting it here.

Bob

[rseery]

Re: Westinghouse LCM22W2 Help (DAC-19M009)

Thanks for all the info on this repair!! I ordered the exact parts list from this thread and my monitor is working again!!!

[tloftus]

Re: Westinghouse LCM22W2 Help (DAC-19M009)

Sorry for bringing back this old thread, but I have this same monitor and power board. I have replaced all 9 capicators with the parts listed earlier in this thread but still have the same problem. The monitor will come on, display momentarily (1-2 seconds) and then the backlight will shut off.. can anyone help troubleshoot this issue?

Thanks,
Tom

[retiredcaps]

Re: Westinghouse LCM22W2 Help (DAC-19M009)

I have replaced all 9 capicators with the parts listed earlier in this thread but still have the same problem. The monitor will come on, display momentarily (1-2 seconds) and then the backlight will shut off.. can anyone help troubleshoot this issue?

We need a baseline of your knowledge and equipment.

Do you have a multimeter? Do you know how to use it? Do you have any electronics knowledge?

As a starting point, see

https://www.badcaps.net/forum/showthread.php?t=10419

You can post your test results and what you have tried. If none of the suggestions work, we can make more.

PS. Post pictures of your boards.

[tloftus]

Re: Westinghouse LCM22W2 Help (DAC-19M009)

I will start there and get back to you, thank you.

[PlainBill]

Re: Westinghouse LCM22W2 Help (DAC-19M009)

Sorry for bringing back this old thread, but I have this same monitor and power board. I have replaced all 9 capicators with the parts listed earlier in this thread but still have the same problem. The monitor will come on, display momentarily (1-2 seconds) and then the backlight will shut off.. can anyone help troubleshoot this issue?

Thanks,
Tom

More information would also be helpful. For example, does the sound also go out? Can you see the image if you shine a bright light on the screen?

When you are taking pictures, include one of the inverter.

PlainBill

[Doward]

Re: Westinghouse LCM22W2 Help (DAC-19M009)

For the record, I am JUST NOW getting around to making this repair I'll let you all know how it goes.

[truep]

Re: Westinghouse LCM22W2 Help (DAC-19M009)

I sold a sanyo tv to a guy who called back and said he had a similar problem.
I brought it back and ran it for 2 days with no problem, I even took it outside in 100 degree weather and all was well. I went to his house and it worked fine until his AC kicked in. Turned out it was getting 95VAC! Check your mains voltage.

[Doward]

Re: Westinghouse LCM22W2 Help (DAC-19M009)

Replaced all 9 caps - complete success! Now rocking dual 22" screens for my main setup! Need to keep my eyes open for more bad LCDs

[raven1708]

Re: Westinghouse LCM22W2 Help (DAC-19M009)

I just got one of these boards in to repair. The main problem i am having is that it seems that he took it to someone else for repair first and they removed two caps from the board and never replaced them. I have no way of finding out the values of them and was wondering of someone could look on theirs that they are working on. Their locations are CE105 and CE109. Thank you

[Wrog]

Re: Westinghouse LCM22W2 Help (DAC-19M009)

I just got one of these boards in to repair. The main problem i am having is that it seems that he took it to someone else for repair first and they removed two caps from the board and never replaced them. I have no way of finding out the values of them and was wondering of someone could look on theirs that they are working on. Their locations are CE105 and CE109. Thank you

If your power supply board looks anything like the one attached to post #1, point out which ones are reference designator CE105 and CE109. Then someone can likely match up the can size with the proper values.

[alexanna]

Re: Westinghouse LCM22W2 Help (DAC-19M009)

post a pitcure of your board and point out CE105and CE109
Al

[tloftus]

Re: Westinghouse LCM22W2 Help (DAC-19M009)

Ok, I am finally getting back to this.. I have a Westinghouse LCM22W2 with the DAC-19M009 power / inverter board. The display comes on for 2 seconds and then the backlight goes out -- the image is still visible, just no backlight. I replaced all 9 capacitors on the board with Panasonic ones from Digikey and still have the EXACT problem. I do not have a meter to check the capacitors, I am pretty good with a DMM if instructed on what to look for. I have attached a photo of the front and the back of my board. Thanks in advance for any help that you can provide.

Tom

[Wrog]

Re: Westinghouse LCM22W2 Help (DAC-19M009)

Ok, I am finally getting back to this.. I have a Westinghouse LCM22W2 with the DAC-19M009 power / inverter board. The display comes on for 2 seconds and then the backlight goes out -- the image is still visible, just no backlight. I replaced all 9 capacitors on the board with Panasonic ones from Digikey and still have the EXACT problem. I do not have a meter to check the capacitors, I am pretty good with a DMM if instructed on what to look for. I have attached a photo of the front and the back of my board. Thanks in advance for any help that you can provide.

Assuming the Panasonics you used are new FM series (that's what they look like to me), you won't need a meter to check to see if they are good. Retiredcaps has an excellent thread on things to check when it comes to "2 seconds to black" problems.

[tloftus]

Re: Westinghouse LCM22W2 Help (DAC-19M009)

Here are some results if they help:

Transistors (U106 / U103): All the readings start in the 5-10k ohm range and then begin climbing. Tested all 6 combinations of readings with similar results.
All tests done in circuit.

Mosfets (D101, D102): All the readings behave in the same manner.. they start in the 0-5k ohm range and then either begin climbing or falling depending on the pin combination. I can give exact results if someone can tell me exactly what I'm looking for here.

Fuse (F200): Continuity exists.

Transformers (T200, T201): These have 11 pins (7 on one side, 4 on the other) on each of them.. I'm not sure how to read them as I get no resistance reading on any combination I try. Some of the leads are covered in goop though and I dont want to try to remove that and mess something up until I know what I'm looking for.

CFL Bulbs - No spare to test with.

Without some specific instruction this is about the best that I can do. If there is anything specifically I can check please let me know. Also I failed to mention that I did not replace the large 400V 120UF capacitor when I did the other 9 smaller ones.

Thanks,
Tom

[PlainBill]

Re: Westinghouse LCM22W2 Help (DAC-19M009)

Here are some results if they help:

Transistors (U106 / U103): All the readings start in the 5-10k ohm range and then begin climbing. Tested all 6 combinations of readings with similar results.
All tests done in circuit.

Mosfets (D101, D102): All the readings behave in the same manner.. they start in the 0-5k ohm range and then either begin climbing or falling depending on the pin combination. I can give exact results if someone can tell me exactly what I'm looking for here.

Fuse (F200): Continuity exists.

Transformers (T200, T201): These have 11 pins (7 on one side, 4 on the other) on each of them.. I'm not sure how to read them as I get no resistance reading on any combination I try. Some of the leads are covered in goop though and I dont want to try to remove that and mess something up until I know what I'm looking for.

CFL Bulbs - No spare to test with.

Without some specific instruction this is about the best that I can do. If there is anything specifically I can check please let me know. Also I failed to mention that I did not replace the large 400V 120UF capacitor when I did the other 9 smaller ones.

Thanks,
Tom

It's unlikely the large capacitor is responsible for this problem.

I've marked up the picture of the bottom of the board. The resistance of the transformer secondaries should be tested by measuring from S1 to S1a and to S1b. Also measure from S2 to S2a and S2b. Use a needle to make contact with the solder pads At S1a, S1b,etc. Closing the hole with hot melt glue is a good idea.

Measure the voltages at R1, R2, R3, R4, V1, and V2 while the backlights are on.

Try to determine if a CCFL is broken by unplugging 3 of the CCFLs, then turning on the TV. If the display flashes, turn the TV off, then unplug the first CCFL and plug in the next, Turn the TV on again and see if the display flashes. Repeat for each CCFL. If there is no flash from a particular CCFL, it is either defective or there is a wiring probblem.

PlainBill

[tloftus]

Re: Westinghouse LCM22W2 Help (DAC-19M009)

S1 -> S1A = 358 ohms
S1 -> S1B = 356 ohms
S2 -> S2A = 357 ohms
S2 -> S2B = 357 ohms

The next thing I did was your CFL test and what I found was interesting.. one at a time each of the bulbs displayed 2 seconds of light except for one, the one labeled CN2. It, by itself, did nothing.

Also I failed to mention but there is a faint but audible noise coming from the area the "failing" CFL wires lead to (I have not yet disassembled any further into the CFL or LCD assembly). When I disconnect the "failing" CFL wires (leaving the other 3 connected) there is a louder noise that appears to be coming from the power / inverter board. Either from one of the two transformers you had me check resistances on or the transformer near the large cap / power cable.

Thanks for your help in troubleshooting this.. I REALLY appreciate it.

Thanks,
Tom