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Thread

Busted '420.

2001-09-28 by Brousseau, Paul E (Paul)

Last night, I patched up my 420 for the first time, and had a bit of a bad
expirience.  It's not calibrated, and just built.  When I powered it up, the
other modules in the system worked OK.  But when I patched something into
it, the power cut out on my entire system (8 modules total).  After that,
even when everything was unpatched from it, I couldn't get any power to the
rest of the system.  The other modules worked OK when I unplugged it from
the power module.

I haven't pulled it out to inspect it yet.  Does anyone have any advice on
where to start looking?  Of course, first of all, I'll make sure all the
parts are facing the right direction and look for burnt out ICs.  :)

--PBr, hoping it's something simple and stupid, but thanking his lucky stars
that Paul S. will "repair" modules... ;)

Re: [motm] Busted '420.

2001-09-28 by Thomas White

Check your power cable and make sure it is properly put on the 900 power supply and the other end on the module itself. I had a smimlar problem before when DC was going from the miss-plugged module to the rest of the modules in the system. This was the single most scary moment (so Far...) in my MOTM history. Check it out

Thomas White

PS. Larry can be thanked for the design of the new pedal interface as well as for talking me into the module by listing its alternative uses in a recent mail. I'm sure Paul got a couple orders after that mail. Larry, thank you for your endless support of MOTM!

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----- Original Message -----

From: Brousseau, Paul E (Paul)

To: 'motm@yahoogroups.com'

Sent: Friday, September 28, 2001 10:57 AM

Subject: [motm] Busted '420.

Last night, I patched up my 420 for the first time, and had a bit of a bad
expirience. It's not calibrated, and just built. When I powered it up, the
other modules in the system worked OK. But when I patched something into
it, the power cut out on my entire system (8 modules total). After that,
even when everything was unpatched from it, I couldn't get any power to the
rest of the system. The other modules worked OK when I unplugged it from
the power module.

I haven't pulled it out to inspect it yet. Does anyone have any advice on
where to start looking? Of course, first of all, I'll make sure all the
parts are facing the right direction and look for burnt out ICs. :)

--PBr, hoping it's something simple and stupid, but thanking his lucky stars
that Paul S. will "repair" modules... ;)

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Re: [motm] Re: Busted '420.

2001-09-29 by jwbarlow@aol.com

In a message dated 9/28/2001 7:42:29 PM, phaeton777@... writes:

>Check the electrolytic caps, ICs, diodes and PSU 
>connectors. $20 says that's your prob.
>

My guess too. There was a post a couple of months ago involving an 800 (?) 
with a similar behavior -- a few of us suggested looking into these areas, 
but I don't remember ever hearing back as to what the problem was (ever find 
out?).

JB

Re: [motm] Re: Busted '420.

2001-09-29 by Dave Hylander

I think your talking about one of Jim's modules , and it did turn out to be 
a reversed polarity.  I had a similar problem a bad timer IC that was 
pulling down the supply voltages across the modules powered by the same PS.

Check your connections for polarity.  If you have a DVM, check the voltages 
with only the suspect module in attached.  If you have a DVM, call Paul, 
and he can walk you through diagnosing the faulty component.

dave

At 01:05 AM 9/29/01 -0400, you wrote:

Show quoted textHide quoted text

>My guess too. There was a post a couple of months ago involving an 800 (?)
>with a similar behavior -- a few of us suggested looking into these areas,
>but I don't remember ever hearing back as to what the problem was (ever find
>out?).

Re: [motm] Re: Busted '420.

2001-09-29 by keithw@cix.co.uk

In-Reply-To: <4.2.2.20010929084903.01a66390@...>
Reversing the polarity was Dr Who's cure all,
sure got him out of a scrape or too.
Have you got a sonic screwdriver?

:o)

Keith

http://home.freeuk.net/lowpass

Re: [motm] Busted '420.

2001-09-30 by J. Larry Hendry

----- Original Message -----

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From: Thomas White
PS. Larry can be thanked for the design of the
new pedal interface as well as for talking me into
the module by listing its alternative uses in a recent
mail.

--LH--
Well, remember, my original design was a plain-jane approach.  It was Paul
that added all the goodies to bring it up to MOTM standards.  Gate, S-trig
converter, LED.   :)

--TW--
thank you for your endless support of MOTM!

--LH--
Oh, it's all fun and I like to contribute what my limited abilities allow.
The great part is that being involved with MOTM has been such a learning
experience.  It has been a catalyst for me to start digging into
electronics.  It has been 25 years since I graduated from 'lectronics
school.  In my line of work (high voltage) we don't get to play with the fun
stuff (unless you are one of those guys that takes pleasure in smoke
letting.  :)

Larry