Ibanez DM-1000 modem sounds on delays

[imbuedblue]

I have an Ibanez DM-1000 digital rack delay that has intermittent modem-like sounds on the delays. The problem seems worse when hotter signals are run through the delay.

I am not terribly familiar with the digital realm so I'm not quite sure where to start, but assume this problem has something to do with a/d or d/a conversion.

I have attached schematics, if anyone can point me in the right direction.

Thanks.

[notaufnahme]

Hi imbuedblue,
the link seems to be dead, blank gif file.


Frank

[Jazz P Bass]

Here is a repost of the schematic.

DM1000 Digital Delay {SM}.zip

[eschertron]

Have you eliminated the possibility of RF interference? Cell phone noise (modem-like, as you describe) is picked up by my wireless belt pack transmitter, but also by my computer speakers - possibly the PC's D/A card? - when the phone is close to the devices in question.

[notaufnahme]

Here is a repost of the schematic.

[ATTACH]36214[/ATTACH]

Hi thanks for you reply.