Contributor III

ZP80 Power Supply

15 replies
6720 views

A friend gave me an old ZP80 he had that didn't power on.

I opened it up and there's a chip on the power supply that's blown up. The top of the IC is gone so I can't look up the part number. Curious if anyone has high res pictures or knowledge of the ZP80 power supply so I can replace the damaged parts?

Thanks.

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J

jldAuthor

Contributor III

http://f.cl.ly/items/2U2q3h2f0w3j2S3m1n2D/IMG_5722.jpg

S

soyuppy

Contributor I

A friend gave me an old ZP80 he had that didn't power on.

I opened it up and there's a chip on the power supply that's blown up. The top of the IC is gone so I can't look up the part number. Curious if anyone has high res pictures or knowledge of the ZP80 power supply so I can replace the damaged parts?

Thanks.

I can't upload any pic but the chip is label with:
DH321 VE52

I have similar problem...but no visible sign of any burn chip. Trying to see if I can replace the caps.
Tested the board using computer ATX PSU. 3.3V for R/Blk and 12V for Y/Brn can power and run the unit fine. So If all else fail, will look for pre-fab switching PSU.

J

jldAuthor

Contributor III

Interesting. I was curious about that. The molex connector from PS to board looks vary similar to those in PCs, but on the PS board it says 3.3V out and 14.8V out, so I thought they wouldn't be compatible.

Great to know that if I can't fix this one I could probably just replace the whole part.

Thanks.

J

jldAuthor

Contributor III

I can't upload any pic but the chip is label with:
DH321 VE52

Thanks for giving me the model number of that chip. Are there any other markings or logos? I'd like to identify the chip manufacturer if possible.

buzz

Grand Maestro

Try searching for these markings separately. Very often one of the numbers is a batch or date code. I did a very quick search and came up with a Fairchild FSDM0265RNB. I have no idea if this is a reasonable match, but it looks promising.

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poshul

Contributor III

@buzz, yes that is the correct chip. It's the "brains" of the powersupply loosely speaking.

Soyuppy has determined that the ZP80 will indeed run on 3.3v 12v power, which means that it should be fairly easy to find replacement supplies. It also means that you can plug the relevant lines from a standard ATX power supply in to check that the logic board is still working.

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soyuppy

Contributor I

I have same issue with ZP80 PSU. Tried to replace bad cap but board is still not outputting any voltage. Beginning to think it's the problem in in the DH321 chip.
Just wondering if anyone tried to replace this chip and had any success?

Niclas Sweden

Trending Lyricist I

The chip markings on my board are DH321, VG45 (not VE45).
My ZP80 outputs almost no sound. with the volume at Maximum I can hear the sound very low. It works perfect besides this. I measured the voltages on the output Cables to Red = 3.25V, Brown 0V, Yellow 12.9V.
My capacitor 1800uF, 6.3V at position C206 has blown up. Replaced it with a 2200 uF, 10V.
My board also is missing C210 and R214. Can anyone see if you have theese Components or if they should be missing perhaps?

Niclas Sweden

Trending Lyricist I

Resistor measured between the Black and Brown power cable from the power board and realize that I have a short circuit there. That is why Brown outputs Zero volt.

Niclas Sweden

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Capt.MikeB

Trending Lyricist I

Hi guys, hope someone can help - I'm trying to fix a failed Connect but someone already tampered with it (and abandoned the notion). I can't make out what needs to exist where the U3 pinout is (the chip which has 8 contact points). any thoughts? Thanks so much upfront!

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