Ingemar's advice is the best option.
--------------------------
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----- Original Message -----
From: TechNet <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Sent: Thu Aug 28 04:21:43 2008
Subject: Re: [TN] what damage can a battery leakage do on a TTL/CMOS controller card 1990 vintage
Battery was VARTA - NI-MH. 3.6 V. When we picked up the m/cs they were idle
for 4 years. Manuf date is 1999. M/c booted and worked and within a few days
it stopped. Found battery leaked. Yes cleaned within a day or two. Removed
chips so as not to have all residue going between pin and sockets which we
could not see. Hot water clean and chk under good NIKON - found card is
clean. Thought battery faulty and soon it happened on the other card also.
No we find some chips busted , 10V +/- regulator gone, etc. Just wondering
if there are some devices which will fail when battery liquid is on board
and power on - with all V of 5 , 10 and 14 +/- which ones likely to fail. Or
just change all.
Thanks
-----Original Message-----
From: Brian Ellis [mailto:[log in to unmask]]
Sent: Thursday, August 28, 2008 1:01 PM
To: TechNet E-Mail Forum; Anil kher
Subject: Re: [TN] what damage can a battery leakage do on a TTL/CMOS
controller card 1990 vintage
Nasty, but what kind of battery to start with? The chemistry of
different types can vary enormously.
Inge's advice is probably the safest and surest. Prevention is surely
better than cure: never keep batteries in equipment longer than the
"sell-by" date, whether used or not.
If the cleaning is done rapidly after the leak occurs, it should be OK,
but I would scrap anything that has had more than a week's contact with
the battery residues. Why remove the chips?
Brian
Anil kher wrote:
> Hi all
>
>
>
> Need advise. This has happenned twice in the last 2 months. The battery
> leaked all over the card (S-M - CNC 45 card no. 45.01.02.3) The m/cs did
not
> start the next day.
>
>
>
> If the card is powered after a few years of storage the battery starts
> leaking and within a few days it is all over the PCB.
>
>
>
> We removed the chips and cleaned in Hot water / air agitn and againa nd
> again. Baked bare card and reloaded chips. NADA. Solvent extarct of bare
PCB
> all perfect.
>
>
>
> Advise if we should change all chips - some TTL, some cmos, memory,
eproms,
> etc.
>
>
>
>
>
> Anil
>
>
>
> Micro Interconnexion Pvt. Ltd
>
> D3-12 A, Corlim Ind. Estate
>
> Corlim, ILHAS, GOA
>
> INDIA - 403110
>
> Tel: +91-832-2284337
>
> Fax: +91-832-2284209
>
> alt. E-mail: [log in to unmask]
>
>
>
> LEADERS IN GOLD PLATED PCBs
>
>
>
>
>
>
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