A friend has a Hemingway DP-501 mark 1 digital piano where the metal plug came away from the plastic body, on the wire from the pedal board. The pedals are switches, not continuous controllers like more advanced units. I used a multimeter to figure out the wiring. With my dyscalculia it took over an hour to do this, checking and double checking. Then I soldered in a new plug. I made a table of the pin-outs which might be helpful to someone else 🙂
| Pedal (Position) | Function | Wire Colour | DIN Pin |
|---|---|---|---|
| Left | Soft | Red | 2 |
| Middle | Sostenuto | White | 4 |
| Right | Sustain | Green | 3 |
| – | Common (GND) | Brown | 1 |
It is not a bad piano at all, certainly good enough for kids to learn piano with dynamics and a decent sound if you turn up the treble. But the action is a bit clunky compared to similarly priced Casio models that are without the big speakers.
Hemingway DP-501
Hey,
I have a similar problem: We bought a used DP-501, but the DIN connector for the pedals has broken off.
I purchased a cable that has a 4-pin DIN connector on both ends, cut it, and intended to connect the individual wires to the existing cable that leads to the pedals.
Unfortunately, the color coding of my cable differs from the original one, and I’m not sure how you put together the table provided here—specifically, which DIN pin in your table corresponds to which pin in my connector…
Could you help me out and explain this?
Many thanks!
Thomas
Hi Thomas,
The wire colours in my table only apply to the original cable, so ignore them. What matters is the pin number.
Look at the plug on your new cable. The pin numbers are usually moulded into the plastic near the pins or solder cups. Use those numbers.
Set your multimeter to continuity (beep) mode. Touch one probe to a pin on the plug and the other to each cut wire until it beeps. Write down which colour goes to which pin number. Do this for both ends if you use both plugs.
Match the pedal-side wires to the same four functions. On the pedal side, join each wire to the cut wire that goes to the matching pin number in my table:
Pin 1: Common (GND)
Pin 2: Soft (left pedal)
Pin 3: Sustain (right pedal)
Pin 4: Sostenuto (middle pedal)