MIDISpeak: ROM Mode Troubleshooting

Disconnect any MIDI cables. Attempt normal operation of the Speak using the keypad.

• If the toy works normally, go to step 2.
• If there is "noise" on the display or the toy does not respond to keypad input, please double-check your assembly and installation wiring. It may be helpful to remove the batteries from the host and use a continuity tester to check for short circuits where the MIDISpeak is connected to the host.

  With the host powered on, use a voltmeter to check the following:

  • Voltage across C4 should be 5V or the same as the battery terminals, whichever is less. If not, there is a short circuit on the MIDISpeak, or the MIDISpeak is not receiving power.
  • Voltage on pins 11-16 of IC1 should be the same as the voltage on C4. If not, the microcontroller may not be functioning. Send email to support@highlyliquid.com.
  • Voltage on BUS/GLITCH 1-6 should be similar to that on "PWR -": roughly -12V to -18V from the negative battery terminal. Place a diode in the positive supply connection to the MIDISpeak as directed in the installation guide. If this does not work, send email to support@highlyliquid.com.

Connect a MIDI controller or sequencer to the MIDISpeak. Make sure to follow the power-on sequence for your host device type.

Each MIDI note should cause a brief flash on the Speak's display.

• If you observe activity on the display, go to step 3.
• If you can't produce this result, check the wiring of the MIDI jack. Double-check the MIDISpeak channel setting and the channel setting of your MIDI controller or sequencer.

Try a variety of different MIDI notes and modulation wheel positions.