Need Help debugging Delta Products ADP-200DFB (iMac A1311)

[reedb]

I need help identifying and finding a pin out for IC31, DAP017A (PFC I think) and IC32, DAP015A (PWM controller I think). A schematic would also work but from my searching on this forum, they don't seem to be available. I have a self drawn schematic which I've attached below. Both parts seem to be in SOIC16 packages. I can't seem to get any PFC boost out of this unit even though I have changed all the bad components I could find:

F1 open
Bridge rectifier, BD1, T4KB80F is shorted.
Q1,Q3, SPA07N60C3 open.

Any further troubleshooting tips would be welcome.

[reedb]

Re: Need Help debugging Delta Products ADP-200DFB (iMac A1311)

A couple of more images for context. Also I should note that Q2, SPA15N60C3,
and D1,D3 appear to test good.

[sam_sam_sam]

Re: Need Help debugging Delta Products ADP-200DFB (iMac A1311)

I could only find a description of the part number

http://www.datasheetdir.com/Dap017-T...lication-Notes

[reedb]

Re: Need Help debugging Delta Products ADP-200DFB (iMac A1311)

I have to ask how you found that? I spent hours searching and didn't see that.
The DAP015A may be similar to ST Microelectronics, L6599AT. I'm still checking that out. Many thanks! -Reed

[sam_sam_sam]

Re: Need Help debugging Delta Products ADP-200DFB (iMac A1311)

Basically I click on each listing until I found one that had information for what I was looking for

I just put this in google search “ DAP017A “

[reedb]

Re: Need Help debugging Delta Products ADP-200DFB (iMac A1311)

I've updated my schematic. Is there a way to update or replace attachments?

Using the schematic that SAM_SAM_SAM linked to I was able to figure out the boost circuit is indeed running. I just need to get the input voltage high enough to get valid Vcc.
Boost begins at ~90VAC input. 200VDC on C1.
Gate drive on Q2, Bursts of 192KHz @ 13.6Vpp

So now I need to figure out the PWM circuit. I see no gate drive on Q1 & Q3. I haven't found any pinout or datasheet for DAP015AD, but my google-fu is weak. It does seem to be quite similar to ST L6599A. Many thanks for the help so far.

[sam_sam_sam]

Re: Need Help debugging Delta Products ADP-200DFB (iMac A1311)

This is for the DAP005 which from the listing I have seen should very similar but I could not find the DAP015AD full date sheet but the description is very similar

I also found this “ L6599D - L6599 - DAP015 - High-voltage resonant controller “



One note I do not like sites like this that seems to just want to advertise I warned you about it ahead of time

[protocold]

Re: Need Help debugging Delta Products ADP-200DFB (iMac A1311)

I've updated my schematic. Is there a way to update or replace attachments?

Using the schematic that SAM_SAM_SAM linked to I was able to figure out the boost circuit is indeed running. I just need to get the input voltage high enough to get valid Vcc.
Boost begins at ~90VAC input. 200VDC on C1.
Gate drive on Q2, Bursts of 192KHz @ 13.6Vpp

So now I need to figure out the PWM circuit. I see no gate drive on Q1 & Q3. I haven't found any pinout or datasheet for DAP015AD, but my google-fu is weak. It does seem to be quite similar to ST L6599A. Many thanks for the help so far.

Sorry to dig up this old thread.... did you figure it out? I am trying to seek some help on the same board.