DAC-19M009 Problems

[NickFi]

Re: DAC-19M009 Problems

@bradl450 -

Replace the rest of the caps. Not the big one on its side though.

Check the 2 transformers (side by side) with an ohmmeter and verify that their readings are the same.

@capn_chris - Resolder the transformer connections to the board.

Toast

Hi Toasty,
I've had my Chimei 22" monitor running since 2006 till 2015. It recently died (screen was getting black in a few minutes, then seconds). I found that some of the caps were totally bad - I have an ESR meter and they had an internal resistance over 100 ohm (while typically they are under 0.5 ohm). The big capacitor 120uF/400V was also completely stuffed (internal resistance over 100 ohm). After replacing the capacitors, the screen still turns off after a few seconds and I can hear some corona discharges in the inverter transformers (marked 28740001100 MB 633A). Now I am trying to apply some PCB laquer on the windings of these transformers - with some luck the shorted turns will get insulated.

Nick

[selldoor]

Re: DAC-19M009 Problems

Hi Toasty,

with some luck the shorted turns will get insulated.

You will need an awful lot of luck and it will probably do no good.

Have you tested the secondary wiring resistances. They need to be almost the same within 5% on both transformers. Perhaps post a good clear picture of your board
top and bottom

[John Graham]

to Toasty, PlainBill, and other gurus on Badcaps
Hi,
I have an Acer AL2216W with the Power board as the Delta DAC-19M009 Rev 01A -see pic attached.
I stumbled on this forum while researching bad capacitors (the bane of cheap electronics) for my power board above.
While trying to identify the caps I need to replace (the tell-tale bulging/domed/leaking electrolyte or powder/etc), I had to lift one capacitor (CE103) that was soldered "flat" (instead of vertical) - see arrow on my photo attached - and the white glue that was holding it in place stripped the cap value - all I could make out is a 2????? uF 25V (see photograph attached).
The nearest I could get to was a DAC-19M008 posted by capn_chris (https://www.badcaps.net/forum/troubl...9m009-problems post #7), but it did not identify the capacitor in question.
Post #1 is also nearly identical to mine, except that mine does not have the aux audio board below (and the photo was too blurred to make out the DAC model) and it did not identify the cap in question.
came across another excellent article (with parts/photos/sources/etc) but, unfortunately, it is the DAC-19M010 (different to mine and noticeable from the layout) - see https://tim.cexx.org/?p=839&cpage=1
Can anyone identify the cap CE103 (value in uF and Voltage) please?
Sincerely,
John Graham

[John Graham]

Hi again,
Please see my previous post (above) on replacing bad caps on a Acer AL2216W power board (Delta DAC-19M009 Rev01A) where I ran into a problem on identifying a cap (I'm sure most everyone would agree that replacing a cap willy-nilly with another, by guessing the value of capacitance, would be foolhardy as the circuit was designed with certain cap values).
Further research on the Internet yielded a source for an identical (???) replacement power board.
I thought that getting a replacement power supply (Delta DAC-19M009 (mine is Rev01A) would be less grief (and anxiety) for me. See https://www.buyqual.com/dac-19m009bf...er-supply.html
I'm not sure if I plug in this (Westinghouse) board (see image attached) if I would screw up a simple bad cap replacement into a total loss (and take the fun and sense of accomplishment too!). Also, I realized that Delta manufactured identical power boards that various manufacturers (like Westinghouse, Vizio, etc) incorporated into their products, so this may work identically to the the Acer.
Another point to consider is that this Delta board is also manufactured in China (Shenzhen) and may (most probably) have the same CapXon caps that deteriorate so rapidly. The fine print is "We don't have original boad now, we send another board for it, same use."
Any advice would be appreciated.
Sincerely,
John Graham.