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Old 12 December 2006, 09:50   #1
keropi
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Question Is there a site (with pics) or guide of how to install a coin battery on the A4000D?

Hi!
as topic says, I have 2 A4000D , that I want to install coin batteries too, is there a guide somewhere (prefferably with pics!) of how to do it?
thanx for any info!
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Old 12 December 2006, 10:22   #2
alexh
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http://aminet.net/package/hard/hack/LithBatt
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Old 12 December 2006, 10:47   #3
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thanx alexh, but I really don't know what the 3 pins of the battery on the 4000 mobo are... nor I can find with ease... what is - , + I cannot tell
anyone care to share a pic or something?
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Old 12 December 2006, 11:11   #4
coze
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There should be three pins. Two on one side, one on the other side. That lone one should be the -. Of the other two, one is +, the other is self destruct. Be sure to mount your new csppc to the fast slot for a nice fireworks show before you try
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Old 12 December 2006, 11:17   #5
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some useful links :

A4000 schematics

A4000 Hardware guide

I did this hack on my A4000 some time ago, but I don't remember exactly what I did.
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Old 12 December 2006, 11:34   #6
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I was directed to this excellent site, it has pics and everything! awesome stuff! but STILL no pics of how to install the lithium one
Amiga Technical Resourse
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Old 12 December 2006, 19:31   #7
Chain
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if u need some photos try this step by step picces

http://chain.3dgrafika.cz/temp/assahi/
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Old 12 December 2006, 19:35   #8
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nice pics, but how have u connected the pins to the coin battery holder?
u used only the 2 on the left side (and ignored the signle right one?) and on the upper one u put a diode too?
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Old 12 December 2006, 19:44   #9
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Quote:
Originally Posted by keropi
nice pics, but how have u connected the pins to the coin battery holder?
u used only the 2 on the left side (and ignored the signle right one?) and on the upper one u put a diode too?
two pins on the left are connected on board, so one can be free.
diode is soldered on "spring" contact directly, original contact was cutted and isolated from under (as it was in wrong place)
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Old 12 December 2006, 20:05   #10
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I don't get it...
can u make me a simple line scetch with the 3 pins and the coin holder?
sorry if it is too much to ask...
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Old 13 December 2006, 13:19   #11
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no problem




I HATE MS PAINT! but im at work

Last edited by Chain; 13 December 2006 at 13:28.
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Old 13 December 2006, 15:29   #12
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MEGA-THANKS Chain!

this is exactly what I needed, a simple schematic!
this thread BELONGS to the hardware.prb forum!
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Old 13 December 2006, 15:30   #13
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btw, the diode needs to be type: 1N914 , right?
and it has some color stripes on one end, do they need be closer to the battery of the mobo? I think the battery right?
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Old 13 December 2006, 15:38   #14
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Any silicon diode will do (forget special stuff like germanium). Stripe goes towards motherboard. (look at lithbatt.lha linked above for an illustration)
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Old 13 December 2006, 18:31   #15
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nice nice, thanks all!
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Old 14 December 2006, 07:44   #16
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i can only recommend to measude voltage diferencies if you have some spare diodes, as lower=better. Some diodes have really big voltage decrease. 2.8V will work, but 2.7V or lower is sometimes too low for clock circuit (remember originally there was 3.6V battery (3x1.2V))
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Old 19 December 2006, 23:37   #17
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Hay, Keropi

Please post what Diode you used and maybe where you got it too. I am going to be doing this soon and your help would be great.

Thanks~
 
Old 20 December 2006, 00:16   #18
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@CroCrew:

I will , but it may take some time.... I guess I will do it on xmas time....
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Old 27 December 2006, 11:27   #19
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damn! my mobo has the alone pin OK, and the "free pin" of Chain's drawing... and the previous owner had there a set of external rechargable phone batteries... 3x1.2v if I remember correctly...
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