[sdiy] Digitech PDS1002 schematic?

[gordonjcp at gjcp.net]

Does anyone have a service manual or even just a circuit diagram for a Digitech DPS1002 2-Second Delay pedal?  I just picked one up that only works on the 500ms range - the 2s and 125ms don't appear to echo.

I wondered if it's maybe something to do with the 2-second muting when you switch ranges.  That works okay when you select 500ms, but may be staying on in the other ranges.  Or it might be something else totally...

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Gordonjcp MM0YEQ