UMR: Assembly Notes

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

Assembled Board: Scan-High Configuration

Assembled Board: Scan-Low Configuration

MIDI Wiring

Parts List

All components are mounted on the side of the board with the white legend. Components can be mounted in any order, but it is easier to mount the smallest components first.

Part	Image*	Notes
C1-C3		None.
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-low 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 numbers on circuit board legend.
SW2		Numbers on switch should match numbers on circuit board legend.

*Appearance of parts may vary.