From: Johannes Wolf (mp2100_at_mail-gw.estec.esa.int)
Date: Tue Aug 12 2003 - 23:25:38 PDT
The RTC (Real Time Clock)is a separate circuit which is able to run on the
backup-battery of the MP 130 as well.
That the clock is running some times and some times not may be caused by
instable oscillations of the crystal.
But normally this should be in conjunction with changes of the power supply
voltage (i.e. having the ac adaptor connected, operating from battery,
operating with removed battery pack -> from the backup battery).
I would try to leave the Newt on the ac adaptor overnight to see if the time
is still correct on the next morning. Then I would fully charge the
batteries and try the same on batteries over night.
The next test would be to remove th ebatteries so that the Newts RTC must
run from the backup battery.
If you then can repeat this error you should replace the backup battery.
Another option would be to replace the crystal on the logic board.
Cheers
Johannes
> -----Original Message-----
> From: newtontalk-bounce_at_newtontalk.net
> [mailto:newtontalk-bounce_at_newtontalk.net]On Behalf Of Len Cole
> Sent: Tuesday, August 12, 2003 6:29 PM
> To: newtontalk
> Subject: [NTLK] "Timeless 130" take two
> I've just acquired a MessagePad 130 which exhibits
> intermittent clock operation. I have been able to pretty
> much verify that everything else on this MessagePad works
> okay except for the PCMCIA slot.
> I did search the MARC archives for posts related to this
> topic and found several describing the symptoms (such as
> "Lizzie's Timeless 130") as well as suggested causes and
> cures. I did not find any information about the cause or
> the cure that I thought was conclusive.
> Can anyone tell my if this is a major subsystem failure,
> meaning that it will eventually cause other parts of the MP
> to fail? Or is this an isloated subsystem which won't casue
> more hardware faults to propagate? Is this a problem which
> can be cleared up by a reset procedure, or does the unit
> have to be disassembled.
> Other than the recalibration of the clock's crystal, which
> seems to apply only to the 2x00s, is there a known cause
> for the clock to not run when the MP 130 is turned off?
> Also, with respect to the Mac's LocalTalk network, which is
> not active when ethernet is being used, has anyone been
> able to successfully establish a link between a MessagePad
> and a Mac through Apple's LocalTalk Bridge control panel?
> What about through a hardware ethernet-to-LocalTalk bridge?
> I get a nice solid comms link if I disconnect ethernet and
> hook the MP up directly through AppleTalk without the
> Bridge control panel. I'm running OS 9.2.2 if it makes a
> difference, and LocalTalk Bridge handles my AppleTalk
> printers just fine.
> Thanks in advance for assistance.
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