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Author Topic: need help fixing JB3 optical jack  (Read 2486 times)

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Offline andrewkw

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need help fixing JB3 optical jack
« on: May 30, 2005, 04:41:59 PM »
I know theres a lot of threads about this, but i cannot find a detailed description.  I have 2 jb3's both have the optical problem.  The connector completely broke off one, however that jb3 does not want to open at all so I will leave that be for now.

The second jb3 the connector is just lose, I have opened up the jb3 and I have a soldering iron, however I'm not sure what to do.  I have no soldering experience, however I think I can handle it.  I'd like to get this done for a show tomorrow (never wait till the last minute).

Any chance anyone has pictures of what i'm supposed to do, or can at least give a detailed description.  thanks!

in the mean time i'll try and get the other jb3 to open.

Offline neutrino

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Re: need help fixing JB3 optical jack
« Reply #1 on: May 30, 2005, 05:56:54 PM »
I don't have the time to give you pictures to go along with my description but here it is.

There are five screws holding the JB3 together, four under the rubber pads/feet and one underneath the battery door compartment directly between where both batteries are inserted. Remove all five screws, and the top cover of the jb3 should lift off fairly easy without any prying of the cover. Now there are several screws you will see on the top of the main circuit board. Two are used to attach the main board to the housing and four larger screws are used to attach the hard drive to the main board. The two smaller Phillips head screws to the bottom left and right of the display are the only ones you need to remove. Once removed, carefully lift the main board out of housing by lifting the top end of the main board, which has the firewire/usb/lineout connectors. The bottom of the main board has several flex connectors which need not be removed to exposing the rear of the mainboard. Think of it as a flip-top lid, which you open and leave on its hinges. You now have access to the optical connector which you can reseat flush to the main board and re-solder. There are two solder pads holding the optical connector on from the top, three from the bottom and three from the left side. It's important you make sure the optically jack is seating as flat on the board as possible. To do this optical job right, ideally you should use a tiny drop of liquid flux to each pad and add only a bit of solder to melt the solder which is all ready there. Do not gob it on. If you have a variable temperature soldering iron, do not set the temperature over 650 degrees, which is the high-end temperature for surface mount repairs. Excess heat for any duration of time can cause components to fail. BE FOREWARNED!!! If you have some soldering experience, it is a pretty simplistic job, as there are few components laid right near the connector and the ones that are there are relatively large. If you have second thoughts on the soldering job, don't do it. Send me A PM and I'll see if I can help.

Good luck.
dB-
« Last Edit: May 31, 2005, 08:52:09 AM by neutrino »
DPA4060 > R-09

Offline andrewkw

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Re: need help fixing JB3 optical jack
« Reply #2 on: May 31, 2005, 04:06:13 PM »
thanks for the reply and +t for the help
i got it open but do not have the liquid flux to solder on.

Offline neutrino

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Re: need help fixing JB3 optical jack
« Reply #3 on: May 31, 2005, 07:43:46 PM »
Liquid flux isn't absolutely necessary but aids in helping the solder flow. If you have a electronics store near by, pick up a flux re-work pen and a bit of re-work solder which is usually sold coiled up inside a dispenser which looks like a ink pen.
dB-

+t back atcha
DPA4060 > R-09

Offline TenoRichards

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Re: need help fixing JB3 optical jack
« Reply #4 on: June 29, 2005, 06:43:29 PM »
Just took mine apart, and looked at the opti in jack. I thought I was screwed but upon taking it apart, found that if I took the white housing which is the jack, and snapped it back into place everything is fine. It *snapped* into place and is back in working order. I got LUCKY.

Just a thought. Before soldering, you might wanna take the thing apart and put it back together again.
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Offline spyder9

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Re: need help fixing JB3 optical jack
« Reply #5 on: June 30, 2005, 02:31:37 PM »
+T acroos the board.  I'm having problems with my optical-in on one of my JB3s.  Thanks for tips.

 

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