DAC-19M008 Subs

[JTHill524]

I have a Acer AL196W Ab Model. It has a DAC-19M008 BF power board.
Is there another PB that will work in place of the 08?

Green power button comes on and stays green if video is sent to it.
No Flashes no nothing. The Monitor just quit one day. All nine Caps have been replaced, as has IC201 & IC202. I have F102, F200, & IC200 a OZ9910GN on order.

I didn't have +5v on pin 12 of IC200 so F200 could be bad.
I think I blew F201 when I was testing for +5v on pin 9-10 on CN5 connector. It's testing open now.

Thanks

[JTHill524]

Re: DAC-19M008 Subs

OK while waiting for the OZ9910GN to show up I jumped F102 & F200 with a fine wire & read pin 10 on CN5 and it was 1.98v not the +5v it should be. Also the Power light doesn't come on when I press it. I seem to keep going backwards. I wish I could find a good schematic for the board with voltage testing points.

Help Please.

[PlainBill]

Re: DAC-19M008 Subs

OK while waiting for the OZ9910GN to show up I jumped F102 & F200 with a fine wire & read pin 10 on CN5 and it was 1.98v not the +5v it should be. Also the Power light doesn't come on when I press it. I seem to keep going backwards. I wish I could find a good schematic for the board with voltage testing points.

Help Please.

I haven't seen this design before. I'd really like to help you, but the quality of the picture just isn't good enough. As an example, there are two 8 pin ICs; I can't read the identifier of either of them, let alone the part number. I THINK the identifiers are U101 and U103. What are the part numbers?

See if you can borrow a 5 megapixel or better camera and take some sharp pictures. Troubleshooting these without a schematic isn't difficult.

PlainBill

[alexanna]

Re: DAC-19M008 Subs

OK while waiting for the OZ9910GN to show up I jumped F102 & F200 with a fine wire & read pin 10 on CN5 and it was 1.98v not the +5v it should be. Also the Power light doesn't come on when I press it. I seem to keep going backwards. I wish I could find a good schematic for the board with voltage testing points.

Help Please.

Please anyone reading this thread never jumps a fuse, they are there for a reason. I have never jumped a fuse, but I used the wrong type and you can do some serious damage.
Have you tried measuring voltages without the logic board hooked up? There is the possibility you have a shorted inverter causing your problems.
Some of the delta boards have 3 or smaller surface mount fuses on the back side of the Inverter/PS.
How about supplying some good quality photos of the front and rear of the power supply, we need to be able to identify components; I think your problem should be able to be solved without a schematic.

[sabre504]

Re: DAC-19M008 Subs

Hi i know this is not his board but it is one i have so uploaded pics in hopes that it helps.
Do you mean the 2 ic behind the transformer if so they are AOP605 MOSFET
have attached datasheet

[jetadm123]

Re: DAC-19M008 Subs

OK while waiting for the OZ9910GN to show up I jumped F102 & F200 with a fine wire & read pin 10 on CN5 and it was 1.98v not the +5v it should be. Also the Power light doesn't come on when I press it. I seem to keep going backwards. I wish I could find a good schematic for the board with voltage testing points.

Help Please.

IIRC, F200 feeds the two mosfets IC201 and IC202. When one of these mosfets shorts, it opens up F200. Try checking these mosfets as they are notorious for shorting. And like alexanna suggested, DO NOT bypass a fuse, as it can cause additional damage.

[PlainBill]

Re: DAC-19M008 Subs

Hi i know this is not his board but it is one i have so uploaded pics in hopes that it helps.
Do you mean the 2 ic behind the transformer if so they are AOP605 MOSFET
have attached datasheet

That's not them, sorry. I noticed one of the MOSFETs seems to have gotten a little warm.

I was referring to the 8 pin ICs on the bottom side of the board. The one on the right is the SMPS controller, I have no idea what the one on the left is for, but it is tied into the output of the SMPS transformer.

PlainBill

[sabre504]

Re: DAC-19M008 Subs

Yellow = LM393 (U101)
PGJF

Red = EA1532A (U505)

[alexanna]

Re: DAC-19M008 Subs

That's not them, sorry. I noticed one of the MOSFETs seems to have gotten a little warm.

I was referring to the 8 pin ICs on the bottom side of the board. The one on the right is the SMPS controller, I have no idea what the one on the left is for, but it is tied into the output of the SMPS transformer.

PlainBill

DAC-19m008 AF REV.01a
SMPS controller is EA1532A it is U105
There is another 8 pin Ic it is U101 it’s number is LM393 it looks like it’s for audio

Didn’t mean to post on top of you sabre504

[sabre504]

Re: DAC-19M008 Subs

Snap

[PlainBill]

Re: DAC-19M008 Subs

DAC-19m008 AF REV.01a
SMPS controller is EA1532A it is U105
There is another 8 pin Ic it is U101 it's number is LM393 it looks like it's for audio

Didn't mean to post on top of you sabre504

You're batting about 500 here. The board etched and drilled for audio, but it isn't used on this version. LM393 is a dual comparator. That brings up the question of what it is comparing, and what it is controlling.

And THAT takes me back, the National data sheet shows the pinout for the metal can package.

PlainBill

[PlainBill]

Re: DAC-19M008 Subs

The fact that you are getting some output is interesting. One area to check is pin 6, and the current sense resistor connected to it.

PlainBill

[JTHill524]

Re: DAC-19M008 Subs

Ok let me start again. Hello My name Is Jay,
I was given the Monitor after all the Ele-Caps were changed and it didn't fix it.
What happened was is was working fine then went Black. The Green power LED stayed on. If the Video cable was taken off it would go orange, Put it back on and it would go Green.
I started doing some checking and found where the 8pin IC201 & 202 so I replaced them still the same.
So I found this place and read everything it had here on DAC-19M008 & Acer AL1916W ab. There was one that was saying there was a consent +5v on Pin12 (VREF) of the IC200 (OZ9919GN). SO I checked it and there was No 5V. Checked F200 but couldn't be sure if it was open or not.
So I checked CN5 Pin8 for +13.8V it was there as was +5v on pin 9-10. But then my probe slipped & touched pin 8 & 10 together there was a spark.
The Green power light wouldn't come on so I checked F102 and now it was open so I took off F102 & F200 & checked them tey were both open so I found me some fine wire about 2A & put where F102 & F200 was. Put power to it, no power light.
Still have 13.8v but CN5 pin10 shows about 2v not 5v.

That is where it sits now. That is why I'm looking for a good schematic with the voltage testing points.

I'll try to put some new pictures up. Some is taken through a Magnifying Glass

Tried and kept getting this:
"Your submission could not be processed because a security token was missing."

[PlainBill]

Re: DAC-19M008 Subs

Let's examine this. First you had a 'black screen' problem. The troubleshooting to that point was first rate. Then things start going bad.

Replacing components (driver ICs) without a good reason (for example, a resistance check showing they were shorted) is foolish.

Next you checked for voltages on the inverter controller, found one missing but were unable to determine if a fuse was open???? Not encouraging. A good fuse will ALWAYS have a resistance of less than 1 ohm. Other than 'is the power light on?', it is the simplest test in electronics.

Now you short two non-adjacent pins together? Not a good move, but accidents do happen.

Jumping fuses with wires - ALWAYS a stupid thing to do unless you have established that the condition that blew the fuse is no longer present.

As far as a schematic; good luck. You can search sites like elektrotanya and see if you can find a service manual for the monitor. Googleing DAC-19M008 schematic might find something. I often use the datasheet on the ICs for information on how the circuit works.

I think this is one you should mount on the wall as a reminder of what can go wrong.

PlainBill

[sabre504]

Re: DAC-19M008 Subs

Best i can find

[JTHill524]

Re: DAC-19M008 Subs

Ok I found a place to get a DAC-19M008 BF like what I have in mine.(Acer AL1916W Ab) Even showed the picture like mine but when it showed up it was a DAC-19M008 AF (they were selling these also)& it has the Audio plug/board on it. Will this board work in mine or do I need to send it back? Or can I disable a circuit and make it work.

Thanks,

[PlainBill]

Re: DAC-19M008 Subs

Ok I found a place to get a DAC-19M008 BF like what I have in mine.(Acer AL1916W Ab) Even showed the picture like mine but when it showed up it was a DAC-19M008 AF (they were selling these also)& it has the Audio plug/board on it. Will this board work in mine or do I need to send it back? Or can I disable a circuit and make it work.

Thanks,

There are a few extra components, but it should work. If the audio input jack gets in the way, remove it. You can also remove the entire audio amp board if you wish.

PlainBill

[JTHill524]

Re: DAC-19M008 Subs

Nope didn't work. On button stays orange. Then when I turn off power strip monitor flashes.

[Th3_uN1Qu3]

Re: DAC-19M008 Subs

Bad inverter perhaps.

[jetadm123]

Re: DAC-19M008 Subs

Okay, you shorted out the 13.8V output to the 5V output and blew fuse F102 in the process. You still have 13.8V, but your 5V output is now 2.5V. With power off, try checking diode D106 for a short. If that checks ok, then with power on, check the voltage output on the middle leg of diode pack D102. D102 is mounted on the heatsink.