May. 2008 DD-7 Test Mode Items Required • Oscillator x 2 • Oscilloscope x 1 • Noise meter x 2 • AC adaptor (PSA series device or 9 V DC power source) x 1 • Powered monitor x 2 • Expression pedal (EV-5) x 1 • 47-k Ω short plug x 2 Entering the Test Mode 1. Refer to the figure below and connect the measuring equipment to a connector other than the INPUT jack. fig.DD-7-connection.eps MonitorSpeaker Noise Meter Oscilloscope Signal Genelator Power Supply 400Hz 800mV Square 400Hz 4.0V Sine 9V 6.5V 47k Ω Dummy Plug EV-5 2. Turn down all controls all the way counterclockwise. 3. Holding down the foot pedal and inserting a plug into the INPUT jack makes the CHECK LED light up.
* Continue holding down the foot pedal until the LED goes dark. * The CPU and DSP checks are performed before the LED goes dark as just described. If a problem is found in the CPU, DSP, or the like, the LED may not go out. After approximately 2 seconds, the CHECK LED goes dark. After approximately 1 second the CHECK LED flashes, and the number of flashes indicates the version. 1 flash: Ver. 1.00 2 flashes: Ver. 1.01 flashes: Ver. 1.02 4. Release the foot pedal. Quitting the Test Mode Pull out the plug from the INPUT jack and switch off the power. 9