It's always a good idea to check the resistance between the power pins
and ground before plugging in power for the first time. Most modules
will show 10K to 100K between +V and ground and between -V and ground.
You will see the resistance increase gradually, as capacitors charge up.
Richard Brewster
Anthony Rolando wrote:
and ground before plugging in power for the first time. Most modules
will show 10K to 100K between +V and ground and between -V and ground.
You will see the resistance increase gradually, as capacitors charge up.
Richard Brewster
Anthony Rolando wrote:
> Nevermind, I found a second solder bridge. The board powers up without whacking things. Should be clear sailing from here on out.
>
> Thanx,
>
> Tony
>
>
> ----------------------------------------
>
>> To: cgs_synth@yahoogroups.com
>> From: goldenechos@...
>> Date: Tue, 4 Dec 2007 18:00:12 -0500
>> Subject: [cgs_synth] ASR
>>
>>
>> Hey, I picked up a bunch of modules from a fellow (some commercial, some diy) one of which is the CGS ASR (cgs34).
>>
>> It is not working. It basically pulls the power rails down (have not checked which yet) as soon as it is turned on.
>>
>> Here is where it gets funny. All the IC are socketed. So I take all of them out. Still whacks the power rails. Long story short, I have removed all IC, all panel connections and all 3 of the polarized caps... still whacked. I searched for solder bridges and found one... but alas, still whacked.
>>
>> Then I got to thinking, perhaps this is an earlier revision with some sort of brd problem... is this possible? It looks as though somebody attempted to cut a trace, but there is still continity. Are there any older revisions of this board needing a trace cut or something?
>>
>> Thanx,
>>
>> Tony
>>
>> Tony
>>