Canon scanner power supply unit

[snowdog]

I have a Canon CanoScan FB1210U
Last week power suppply unit died (I have opened it and found an explosed
condenser).
Anyone knows if Canon sell this kind of spareparts (btw I think that the
price may be high...)?
I live in Italy and no Canon services for scanner are in my town.
Or may I replace it with a stabilized 12V 1.25 A external power supply
unit without any damage to the scanner?

 

[CSM1]

I have a Canon CanoScan FB1210U
Last week power suppply unit died (I have opened it and found an explosed
condenser).
Anyone knows if Canon sell this kind of spareparts (btw I think that the
price may be high...)?
I live in Italy and no Canon services for scanner are in my town.
Or may I replace it with a stabilized 12V 1.25 A external power supply
unit without any damage to the scanner?

--
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If that is what the output spec on the exploded Power Pack says. It is fine
to replace with a regulated (stabilized) power supply that is not Canon.

You may also just replace the exploded capacitor if you can read the value
from the pieces.

 

[Bruce Graham]

You may also just replace the exploded capacitor if you can read the value
from the pieces.

just to clarify, the capacitor can be sourced from any electronics parts
supply company - it is highly unlikely to be a special Canon part. Take
the scanner to your local TV repair shop if you can't solder, he should
have the part on hand and can fit it. There may be other damage, so that
may not fix the problem though.

 

[Richard Tomkins]

The capacitor exploded for a reason.

The typical regulated wall-wart has a transformer with a built-in fuse in
the primary circuit, it's hidden under the tape that is wrapped around the
windings. It would seem that this fuse may not have blown when it should
have. The secondary usually feeds a full wave bridge rectifier, which is
filtered by a capacitor and this is then applied to a voltage regulator,
which could be a transistor setup or self contained regulator. The output
from this is usually filtered yet again by another capacitor. So, depending
on which capacitor blew, the full wave bridge went and applied AC to the
capacitor which blew it up or the regulator went and applied over voltage to
the second capacitor.

A competent Electronic Technician should be able to diagnose this fault and
repair the unit.

If the scanner had a fault that overloaded the regulator, most regulator
will shut down, till the overcurrent condition is removed.

Maybe a new power unit is a good idea, but you'd best have a technician
measure the current draw to see if the scanner has problem.

rtt

 

[snowdog]

Il Mon, 14 Feb 2005 22:24:49 -0500 Richard Tomkins scrisse:

Maybe a new power unit is a good idea, but you'd best have a technician
measure the current draw to see if the scanner has problem.

thanks a lot to all for the answers.

I think that replacing exploded capacitor may not solve the problem,
because I don't know the reason of this explosion...
BTW I had the same accident with a power supply unot of a personal
computer, replaced it and PC worked fine. Maybe it was caused by a voltage
peak.
I'll try with a new power supply unit.