Ibanez DDL Digital Delay not working

[beedoola]

I can't find a schematic for it but found one for the Flanger of the same type. I've read the FETs that do the switching can fail. I think TR1 on mine may be compromised - if that is what is part of the switching. Here are some schematic snippets for analysis.

http://www.8bitsindgenug.net/ibz_DFL2.gif

http://www.8bitsindgenug.net/ibz_DFL1.gif

The second one has what I think is the switching portion of the schematic.

[Grrrg]

It would be interesting, which DDL you're talking about. And what do you mean with "not working"?
No sound, no LED, no effect. Mine had a bad ground connection on the board where the pots are.

[beedoola]

Sorry, should have added more:

the pedal passes signal but hitting the footswitch does not engage the delay signal. The bypass LED works with the footswitch.

I thought maybe TR1 was bad but that doesn’t seem to be the case.

[Mick Bailey]

Check the operation of Q1, which is a switching FET in the signal path. TR1 is part of the VCO circuit.