Ah... I just looked up the DTR-1 on the Korg website - you're right about it being different:
∑ Rack Mount Auto Chromatic Tuner
∑ 7-Octave Tuning Range
∑ Large Easy-to-Read LED Meter
∑ Built-In Microphone
∑ Strobe Tuning Mode
∑ 2 Selectable Inputs
∑ Cent/Hz Tuning Mode
∑ Cable Check Function
∑ Auto Reference Calibration
∑ 3-Octave Reference Tone (C2 - B4)
Other than the strobe and cable check features (
), you should be able to use the DTR-2000 manual as a rough guide to the rest of the DTR-1 (at least, I'm hoping so).
I'm guessing the strobe mode can be switched to at the push of a button. If it's anything like other tuners with strobe modes, it'll work something like this: unlike a conventional cent/Hz mode which relies on a center position and your distance from it, strobe mode is about the "speed" of the traveling LEDs. The slower they go, the closer you are to tune. When it stops, you've nailed it. The direction it travels indicates whether you're sharp or flat.
And the cable check... I don't know.