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Re-assembling the 42s



#3

I want to start by saying thanx to Paul Brogger for describing how to disassemble a pioneer. "THANK YOU".. My calc has had recurring symptoms of quick battery death and vertical lines in the display x 2. After buying the new 33s for the PE exam and as a replacement, I have just not been happy without my trusty 42s. I have tried to send it in for repair to Fix that calc, but they felt it was hopeless. Finally I got the courage to open it up. Turns out that the springs that go been curcuit board and back of housing (possible ground??)were in contact with a slightly green corroded circular pad. My calc had fallen a few times while using in my work vehicle, and I think it got slightly damp. Anyway wanted to pass these symptons on, it works fine now, although it always worked, but ate batteries and had annoying vertical lines. My question is how fasten it securely back together? I did not shave the heat posts, but reheated and straightened. This worked great on the upper four because I heated the tip of a phillips head and after reassembly, I reshaped the posts. But should I use glue on the others?


#4

First of all, "You're welcome."

For mine, in shaving the lower heat stakes, I didn't truncate them so much as reduce the diameter of the mushroomed heads. Then they could be snapped back through the plastic front and provide a tight (but not completely re-secured) bond.

I would recommend you NOT use any glue -- the stuff could probably wick into the keyboard sandwich and destroy it.

If you really want to re-fasten the lower heat stakes, you'll need to take off the foil overlay, or cut through it. The latter is certainly damaging -- the former seems likely. (As alluded to in the article, I haven't messed with keyboard overlays. I know some do, but it just doesn't seem necessary.)

With regard to the vertical lines -- you might try unseating the PCB and cleaning the PCB-to-LCD contacts, and reassembling. It's yet more invasive, but I should think it's indicated. (I think my earlier article gives some detail on how-to.)

With regard to reduced battery life -- don't I remember someone saying that a bad capacitor somewhere on the board can cause that? Maybe someone will chime in on that, or you could start another thread with that as the subject in hopes of grabbing someone's attention.

Good luck, and keep us posted!


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