Acer AL1916b LCD PSU

[klawsterfobia]

Hey,
I found a 'dead' LCD monitor at work that a customer brought in. It has been sitting on the bench for months so I decided to crack it open to see what I could see. When I popped the PSU out, the problem was obvious: 6 swollen CapXon caps.
There are two on the board that still look fine. One is a 100uF 400V cap and the other is a 22uF 50V cap that is in an awkward spot. I can't tell the brand of either of these two. Should I replace them as well?
This will be my first attempt at replacing caps, so any help would be appreciated.
Thanks

[ratdude747]

Re: Acer AL1916b LCD PSU

make all the crapxon go away. the only good crapxon is a desoldered one.

the 22uf one is crucial to the operation of the unit. its probably hosed. replace to be safe. for the 400v one, if its crapxon, nuke it, if not post the brand so we can tell.

[klawsterfobia]

Re: Acer AL1916b LCD PSU

I can't tell what the 400V is, the way it's bent and glued. I'll order one and the 22uF (crapXon I see now) to be safe.
What is that white glue crap anyway?

[klawsterfobia]

Re: Acer AL1916b LCD PSU

BTW, what is a good brand? I am ordering from Digikey (Canada). I don't see Rubycon, but there is Panasonic.

[Bobdee]

Re: Acer AL1916b LCD PSU

BTW, what is a good brand? I am ordering from Digikey (Canada). I don't see Rubycon, but there is Panasonic.

Panasonic FC or FM are considered to be suitable replacements, suggest you check out the 3 fuses on the board before ordering caps as one may have gone down with the caps

[klawsterfobia]

Re: Acer AL1916b LCD PSU

I did find and test the red circular one on the middle left side, not realizing there were two others. I take it they are the two black rectangular ones on the bottom right by the 8-pin connection interface?

I did a diode check across the red fuse and it was ok. What ohm reading should I see?

[Bobdee]

Re: Acer AL1916b LCD PSU

I did find and test the red circular one on the middle left side, not realizing there were two others. I take it they are the two black rectangular ones on the bottom right by the 8-pin connection interface?

I did a diode check across the red fuse and it was ok. What ohm reading should I see?

Correct on all three
Use Multimeter buzzer or lowest Ohms, the buzzer should buzz and lowest Ohms should read 00.0 on all three

[Brian C]

Re: Acer AL1916b LCD PSU

The Power Board is FSP made ... Can see the transformer part no. SPI.... and PCB no. FSP043-2P101

[Buzzingblast333]

Re: Acer AL1916b LCD PSU

Hello Klawsterfobia : I am a new member and have the same board you have off a EN7410 e Envision Monitor , FSP043-2P101 , i replaced all of the capacitors but got carried away and subsituded couple with the wrong Capacitance and Voltage values . I am requesting your help from the pics you took , if you still have the old caps or are able to tell me what are the V's for C244 -C 241 -C263 -C 261- and the one next to F240 , also C24 . thanks for taking time , regards BB333 .

[klawsterfobia]

Re: Acer AL1916b LCD PSU

I'm a bit of a lazy ass, and haven't got around to swapping out the caps. If you give me the PCB number I can tell you what the cap values are.

[klawsterfobia]

Re: Acer AL1916b LCD PSU

D'oh! I guess I can't read either. Hold on a sec and I'll give you those values.

[klawsterfobia]

Re: Acer AL1916b LCD PSU

C244 = 10v 1000uf
C241 = 10v 1000uf
C263 = 25v 470uf
c261 = 25v 470uf
C24 = 25v 470uf

[klawsterfobia]

Re: Acer AL1916b LCD PSU

Where abouts is F240? Is see F101 and F260.

[Buzzingblast333]

Re: Acer AL1916b LCD PSU

Hello Dear Friend; Thanks for a quick reply , the other one that am missing is to the right between the two Black Fuses (F260 & F240 ) If you look on the edge of the board bottom right of the fuse you should see the number F240. I believe is C 242, it was covered with the white glue , so I couldn't make it up. Do you have the schematic for this board FSP043-2P101 - The Monitor am working on is a Envision EN7410 e made in China , you been a great help. Hopefully I can be of some assistance when the time comes , thanks BB333.

[klawsterfobia]

Re: Acer AL1916b LCD PSU

If its the bottom right-most cap, it's C242 (I had to scrape off some of the glue crap too), which is 10v 470uf.
No problem, glad I could help out.

[Buzzingblast333]

Re: Acer AL1916b LCD PSU

Greatly appreciate it , many thanks for your help . Is time for me get back to do some work in this board ,hope to bring back this one to life , is my first attempt to repair an electronic piece of equip. You've been great , nice to be able to see the pics , am new to all of this , just been trying to read books and looking into the net. for info in this field and I love it . Best regards to all of you , BB333 Ray

[Buzzingblast333]

Re: Acer AL1916b LCD PSU

Hello : I need some advice on how to repair a lifted land or eyelet ( thru hole single layer board FSP043-2P101 . I replace all the capacitors but ruined one when the land or eyelet trace around the hole lifted up and totally came off ; how can i solved this issue , thanks once again for your help . BB333