[sdiy] Roland DEP5 no sound... any service manual (DEP5 or DEP3) ?

[Graham Atkins]

Or possibly a cracked PCB ?

Graham

On 19 Mar 2011, at 14:06, Scott Gravenhorst wrote:

> "Gil W." <gil_we at yahoo.com> wrote:
>>
>> Hi,
>>
>> I have a Roland DEP5 multieffect processor which sounds great but  
>> has a little problem -
>> it won't always play audio out... You can see the input meter  
>> flashing as it should,
>> but not always passes sound via the output jacks. It seems to be
>> intermittent as sometimes it will work ok.
>>
>> I tried cleaning the +4/-20db switch using cleaning spray and it  
>> didn't seem to help,
>> I also noticed that when I push it in or out it will play for a
>> short moment and then the sound disappears...
>>
>> Any suggestions of how to determine the source of the problem ?  
>> battery is new...
>> Also, if anyone has the schematics or service notes for either
>> DEP5 or DEP3, I would be thankful if could have a copy...
>>
>> thanks in advance !
>
> From your description, it seems the switch or it's connection to the  
> circuit is bad.  If the switch
> is soldered into a circuit board, look at the solder connections  
> there, they could be cracked.  Or
> just reflow them all.  If that doesn't help and if you can access  
> the switch contacts, I'd try
> temporarily wiring around it.  If the switch is bad, the wiring will  
> cause the circuit to work
> again and tell you that you need to replace the switch.
>
>
>
> -- ScottG
> ________________________________________________________________________
> -- Scott Gravenhorst
> -- FPGA MIDI Synthesizer Information: home1.gte.net/res0658s/ 
> FPGA_synth/
> -- FatMan: home1.gte.net/res0658s/fatman/
> -- NonFatMan: home1.gte.net/res0658s/electronics/
> -- When the going gets tough, the tough use the command line.
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy