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DuoDock Ticking
(updated 22 March 1998)
Originally posted on comp.sys.mac.portables. BTW, if someone can point me to the referenced DuoDock Power Supply FAQ, I'll add a link to it or replace what is here.
Subject: Re: DuoDock Power Supply - HELP!
From: shenning@fast.net (Stephen M. Henning)
Date: Tue, 10 Dec 1996 22:40:25 -0500
Message-ID: <shenning-ya023580001012962240250001@news.fast.net>
In article <pultrude-0912962108440001@bart-sip-38.ionet.net>,
pultrude@ionet.net wrote:
> I just got a used DuoDock II and have been very happy with it...until this
> afternoon! I hit the button on my keyboard to wake up my Duo...there was
> a pop! noise and the smell of something electrical burnt....and the dock
> went dead! My 'puter's fine but I guess the dock's power supply is shot.
> I checked with JB's Duo Faq sheet and he mentions a capacitor failing that
> causes a 'ticking' sound. Sadly, mine never made a ticking sound. I've
> got a friend who's good with electronics taking a look at the power supply
> but, in the event he can't find anything, does anyone have a DuoDock power
> supply for sale? Or know where I might find one??
Here is the DuoDock Power Supply FAQ:
Note, DO NOT ATTEMPT if you are at all uncomfortable working with
electronics and/or switching power supplies. Even though the power supply
might be disconnected from the AC power, the Capacitors in the power
supply can still have deadly charges left in them.
For those of us with Duo Docks, that suddenly find the power supply
ticking, A very Cheap fix appears to be replacing the Capacitor at
location C28 in the power supply. There are two of us that have been able
to 'fix' the power supplies by replacing that capacitor. (a 100 uF 25VDC
electolytic Capacitor. $.99 from Radio Shack) This is not to say that
other components in the power supply might eventually fail in the near or
far future.
To take the Duo power supply out, first follow
the directions in the duo manual to install a new nubus card.
After you follow these directions, you'll have your dock in three pieces:
base, cover and logic board assembly. The base will contain the power
supply. To remove the supply, you need to push both tabs that are towards
what used to be the dock opening for the duo. Do this while you have the
base slightly inclined torwards you, and the power supply will just slip
out.
Murray Pickard aka photo@ksu.ksu.edu
----------------------------------------------------------------------------
Another place you can get the power supply is from:
Sun Remarketing (www.sunrem.com)
Part Number: 661-1660
$106.71 w/ exchange of old supply
(800) 821-3221
----------------------------------------------------------------------------
Pre-Owned Electronics at (800) 274-5343
$110 with exchange of old supply.
----------------------------------------------------------------------------
gielesen@imwsrv.imw.tu-clausthal.de (Harald Gielessen) wrote:
Ask your local Apple dealer. This seems to be a frequent problem and Apple
exchanged our dock's psu at no cost even though the dock was about three
years old.
----------------------------------------------------------------------------
--
Cheers, Steve Henning, Reading, Pennsylvania, USA
http://www.users.fast.net/~shenning
Subject: Re: Duo Dock Power Supply Source
From: bgautaso@gpu.srv.ualberta.ca (Bjarni Gautason)
Date: 5 Jan 1996 18:31:02 GMT
Message-ID: <bgautaso-0501961242470001@lucija.geology.ualberta.ca>
In article <stevem-0401960004570001@ip075.phx.primenet.com>,
stevem@primenet.com (Stephen Marinick) wrote:
> Well, it finally happened. My Duo Dock's power supply suddenly began
> making the dreaded ticking noise, and refused to power up. I have two old
> posts which give the names of suppliers for this part, but perhaps there
> are other sources? I'm interested in hearing from anyone who's dealt with
> these or any other suppliers, or done this repair to their Dock.
>
> Sun Remarketing (www.sunrem.com)
> Part Number: 661-1660
> $106.71 w/ exchange of old supply
> (800) 821-3221
>
> Pre-Owned
> Electronics at (800) 274-5343
> $110 with exchange of old supply.
Ticking Dock Syndrome: Installment 236578 in a continuing saga
It seems the prices quoted above are out of date. I just spoke with sales
people at these companies and was given prices of roughly 160 and roughly
145 at Sun and Pre-Owned respectively, both with exchange of old supply.
However P-O does not do exchanges with people in Canada (something to do
with customs i.e. free trade in action), so now I'm wondering if anyone
knows of a company (non-Apple) in Canada that sells rebuilt power
supplies? Could you please pretty pretty please post and/or e-mail the
name and address to me, i'd be so :-)
Thank you in advance
Bjarni in Edmonton
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