4MB on-board memory is extended to 8MB.
Caution:
You are responsible for any problem caused by this upgrade.
I do not guarantee this upgradeD
What was made reference : NIFTY FIBMTP1/MES2CTettei-katuyoh bookCMOBILE PC book.
It decomposes and a system board is taken out.
the position of a on-board memory puts an
extension memory is a reverse-side side exactly.
(Photograph upper right)
The 4th sheet of 4MB extension memory increase
Except for 18 pin, the above-mentioned memory is soldered like a photograph.
Where it put and turned the memory over and a speaker side is placed to
the front, it is 2nd BGA chip from a top.
RIOS
89G6403
VL82C420FC5-C
Delete the 5th from under the right-hand side of the tip currently written
to the grade to which silver wiring comes out on the surface.
jump just ~RAS line memory chip 18pin to BGA chip 5pin.
Addition
It is the tool which I am using.
Although reconstruction was successful just because
there was this tool, by the overstatement,
I think that tool selection is important, so that there is nothing.
wire peeler(left upper) :
It becomes easy to make a jumper wire.
Magnifying glass(right upper) :
It is confirmed with a tester and a magnifying glass whether it has soldered well.
solder wick(left middle) : What is sucked up when solder carries out a bridge
solder flux and Detergent(right middle) : If there is solder flux, soldering will
come be made very finely.it will be better to wash after work.
Soldering iron(lower) : soldering iron of 11w. since from the place which it has to the point is short, when soldering a fine place, it was very easy to do and has said mind.
A tester is also indispensable although there is nothing in a photograph.
And bright lighting.It is working on it, putting a desk lamp on a table.
Caution:
You are responsible for any problem caused by this upgrade.
I do not guarantee this upgradeD
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