Powerbook 190cs issues

[chitulino]

Hi to everyone since this is my first post. I bought a powerbook 190 cs from a second hand market and it worked fine but one day I tried something with another powersupply and smoke came out of it. I opened it up and saw a diode was fried and a transistor or a regulator I can't really see what it is. On the PCB it says dz01. So please help me if you can in anyway. Thank you and I wish you all a great week.

 

[Strimkind]

I doubt that there is much you can do as other things may have died but that is the only thing visable. You may be able to put on a new diode but i have clue about such things.

 

[chitulino]

OK, well thanks anyway.Maybe I'll try to get a new logic board.

 

[Bunsen]

Hold up a minute there pardner. I've never been inside a 190 myself, but often the board that the power plugs into is a separate board from the actual main logic board, called the DC Board or Power Board or suchlike. See if you can find the service manual for that model before you give up, and try ifixit.com and welovemacs.com to see if either have take-apart guides for that model. That should tell you which actual board you're looking to replace.

Apart from that, do as the sig says, and don't muck about with power supplies again, mkay?

 

[chitulino]

Thank you very much. I will try and see if it can be fixed. And yes I won't try stupid stuff tosee if it works

 

[zeem]

often the board that the power plugs into is a separate board from the actual main logic board, called the DC Board or Power Board or suchlike.

Not on the 190 or the 5300, the socket is soldered directly to the logic board. A very common failure is loose solder joints causing a lack of power. I've had to resolder my 190 and all three of my 5300s.

The 5300's got a separate DC power module that connects the battery to the logic board, in the opposite corner of the machine from the power socket. I can't remember what the 190's got, it's so long since I've been inside it. It's like a simplified 5300, I seem to remember the DC converter for the battery is actually part of the 190's logic board instead.

 

[chitulino]

Yes, it is all in one piece. That is the problem.

 

[Franklinstein]

The PowerBook 190's circuitry is contained entirely on that one main board (save for the infrared card, which was an option). The 5300 had its power circuitry on a 4"x4" card that sat to the immediate right of the hard drive, as did the 3400 and Kanga.

Anyway, what happened with the other power supply thing that was talked about in the first post? Was it some aftermarket thing, or was it something that looked like it would fit but didn't, or was it a questionable Apple power supply for that model that needed testing?

At any rate, you'll likely need to remove the logic board and examine the area surrounding the power input. Most Macs are pretty good about protection from excessive power, but sometimes too much can get past whatever safeties are installed and destroy other stuff. If you're lucky, simply sourcing new components (likely a fuse, maybe a couple capacitors or resistors as well) and replacing them can get the machine back on track. Of course, something else could also be damaged without showing outright signs of failure.

 

[chitulino]

It was aftermarket. I bought it with it. It worked fine. I guess not anymore