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Old 03-16-2012, 01:19 PM
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Default UMR Assembly Instructions, DIP Switch Settings, and Installation Example

Important Information
  • The kit must be assembled in one of two configurations, according to the scan polarity of the host device. See the installation notes for the scan polarity of your keyboard model.
  • The kit contains some ESD-sensitive parts. Please take reasonable static-control precautions when assembling the kit.



PCB Layout
The location of each part is clearly marked on the UMR circuit board.





The appearance of the board differs based on the configuration:

Assembled Board: Scan-High Configuration




Assembled Board: Scan-Low Configuration





Assembly Tips
  • Start by soldering the smallest components first and the largest parts last.
  • All components are mounted on the side of the board with the white legend.

MIDI Wiring
Wire pins 4 & 5 of the MIDI connector to the corresponding "MIDI IN" terminals on the UMR.





Parts List
Appearance of parts may vary.

C1-C3


D1-D8: Mount these components only for a scan-high configuration. Dark band on diode must match the white band on the circuit board legend.


D9-D16: Mount these components only for a scan-high configuration. Dark band on diode must match the white band on the circuit board legend.


D17: Dark band on diode must match the white band on the circuit board legend.


IC1: Mount socket on the circuit board first, then insert IC into socket. Notched end must match notch in the circuit board legend.


IC2: Mount socket on the circuit board first, then insert IC into socket. End marked with dot must match notch in the circuit board legend.


LED1-LED2: Short lead on LED must match the flat side on the circuit board legend. Optionally, this part is mounted off-board using the included panel bezel.


R1-R2: 1kΩ resistor, marked with the following color bands: brown, black, red, gold.


R3: 220Ω resistor, marked with the following color bands: red, red, brown, gold.


RN1: Mount this component only for a scan-high configuration. Pin 1 (marked with a dot) must be inserted in the small box on the circuit board legend.


RN2: Mount this component only for a scan-high configuration. Pin 1 (marked with a dot) must be inserted in the small box on the circuit board legend.


RN3: Mount this component only for a scan-low configuration. Pin 1 (marked with a dot) must be inserted in the small box on the circuit board legend.


RN4: Mount this component only for a scan-low configuration. Pin 1 (marked with a dot) must be inserted in the small box on the circuit board legend.


RN5: Pin 1 (marked with a dot) must be inserted in the small box on the circuit board legend.


SW1: Numbers on switch should match the numbers on the circuit board legend.


SW2: Numbers on switch should match the numbers on the circuit board legend.
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Old 03-16-2012, 01:40 PM
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Default DIP Switch Settings

Overview

Below are descriptions of the DIP switch settings for the UMR:
  • DIP switch SW2 specifies the MIDI channel to which the UMR responds.
  • DIP switch SW1 controls other parameters relating to the installation.

For most users, only the SW2 channel setting is of interest. Explicit SW1 settings are provided for each keyboard model in the installation notes.

Detailed SW1 descriptions are provided below for users attempting to install the UMR to an undocumented keyboard model. For more information about how SW1 settings relate to the host keyboard, see the keyboard matrix article.

All DIP switch selections become active at power-up.


Channel Selection
Use DIP Switch SW2 to select the incoming MIDI channel.

(MIDI Channel: Switch 1, Switch 2, Switch 3, Switch 4)
1: off, off, off, off
2: off, off, off, on
3: off, off, on, off
4: off, off, on, on
5: off, on, off, off
6: off, on, off, on
7: off, on, on, off
8: off, on, on, on
9: on, off, off, off
10: on, off, off, on
11: on, off, on, off
12: on, off, on, on
13: on, on, off, off
14: on, on, off, on
15: on, on, on, off
16: on, on, on, on


First Note
Use DIP Switch SW1 positions 1-4 to select the MIDI note for the first key on the host keyboard.

(First MIDI Note: Switch 1, Switch 2, Switch 3, Switch 4)
36 (C2): off, off, off, off
37 (C#2): off, off, off, on
38 (D2): off, off, on, off
39 (D#2): off, off, on, on
40 (E2): off, on, off, off
41 (F2): off, on, off, on
42 (F#2): off, on, on, off
43 (G2): off, on, on, on
44 (G#2): on, off, off, off
45 (A2): on, off, off, on
46 (A#2): on, off, on, off
47 (B2): on, off, on, on
48 (C3): on, on, off, off
49 (C#3): on, on, off, on
50 (D3): on, on, on, off
51 (D#3): on, on, on, on


Number or Data Lines
Use DIP Switch SW1 positions 5-7 to specify the number of data lines in use.

(Number of Data Lines: Switch 5, Switch 6, Switch 7)
1: off, off, off
2: off, off, on
3: off, on, off
4: off, on, on
5: on, off, off
6: on, off, on
7: on, on, off
8: on, on, on


Scan Speed
The UMR firmware can respond to the host keyboard's "select" signals differently, depending on the speed of the key scan.
  • Set DIP Switch SW1 position 8 to "off" for older, slower keyboards.
  • Set DIP Switch SW1 position 8 to "on" for more recent, faster keyboards.
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Old 03-23-2012, 06:42 PM
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Default UMR Installation Example: Yamaha VSS-30

Overview
The keyboard shown in this example is a Yamaha VSS-30. Wiring and assembly will vary by target device.

Step 1: Assemble the UMR circuit board.
See the assembly instructions.

Choose either "scan-high" or "scan-low" assembly, depending on the notes for the target keyboard. Set the DIP switches as described in the notes.

Step 2: Attach the hook-up wires.
Attach a length of wire to the pads on the UMR circuit board:
  • MIDI "4" and "5"
  • "+5V" and "GND"
  • Power & Activity LED terminals (optional)
  • "SELECT IN" and "DATA OUT" as described in the install notes.



Step 3: Disconnect power from the target device.
Disconnect any external power cords and remove any batteries from the target keyboard. After disconnection, move the keyboard's power switch to the "on" position to drain any stored charges.




Step 4: Mount the MIDI jack & LED bezels on the target device.
The MIDI jack requires a 5/8" hole and the LED bezels require 1/4" holes.



Step 5: Mount the UMR circuit board.
Mount the UMR circuit board inside the target keyboard. Use the provided adhesive foam. Make sure that the UMR does not make contact with the internal wiring of the target.

Step 6: Wire the UMR to the target.
Connect the UMR to the target keyboard as described in the install notes.



Step 7: Wire the UMR to the MIDI Jack and LEDs.
Superglue can be used to cement the LEDs to the bezels.

MIDI jack wiring is described in the assembly instructions.




Installation Complete
Connect the UMR to the "MIDI OUT" port on any MIDI sequencer or MIDI controller.

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