Mar.2003 fig.11 Executing Factory Reset results in the loss of all data saved by the user. If Factory Reset is not required, turn off the power to quit Test mode. Factory Reset may be run without entering Test mode. To run Factory Reset only, refer to “Instructions for Running Factory Reset” in these service notes. • Following the “MODE Volume Operational Check,” rotate MODE from “SOS” to “STANDARD.” • ”FAct” appears in the LCD, and the “1,” “2,” “3,” and “4” LEDs flash. • Press the [WRITE] button. The “1,” “2,” “3,” and “4” LEDs flash more rapidly, then return to normal condition. 15.
Residual Noise, Shock Noise Check Conduct the “Residual Noise, Shock Noise Check” with the noise meter set to IHF-A, AVERAGE. (5 V/DIV, 1 mS/DIV) • Switch to Test mode according to the instructions in “Entering Test mode.” 10. DSP MUTE Check • Connect a 47-k Ω short plug to INPUT A(MONO) and B. • Set the MODE control to “SMOOTH.” “9” appears in the LCD. • Input a sine wave (200 Hz, 16Vp-p) from the oscillator to INPUT A(MONO) and B. • Connect the noise meter to OUTPUT A(MONO). Connect an open plug to OUTPUT B. • Confirm that nothing is output from OUTPUT A(MONO) and B. • Confirm that the measured value with the noise meter (IHF-A) is -82 dBu or less. 11.
• Set the MODE control to “MODULATE.” “10” appears in the LCD. INPUT Level Switch Check • Connect the noise meter to OUTPUT B. Connect the open plug to OUTPUT A(MONO). • Input a sine wave (200 Hz, 16Vp-p) from the oscillator to INPUT A(MONO) and B. • Confirm that the measured value with the noise meter (IHF-A) is -82 dBu or less. • Confirm that the waveform output from OUTPUT A(MONO) and B is distorted as in the figure below. • Connect a monitor speaker to OUTPUT A(MONO). Connect the open plug to OUTPUT B. fig.12 • Subject the unit to shock by dropping it from a height of 10 cm, then confirm that the unit produces no unusual noise. • Connect a monitor speaker to OUTPUT B.
Connect the open plug to OUTPUT A(MONO). • Shock-test the unit by dropping it from a height of 10 cm, then confirm that the unit produces no unusual noise. • Connect a monitor speaker to the left side of PHONE L/R. • Shock-test the unit by dropping it from a height of 10 cm, then confirm that the unit produces no unusual noise. • Connect a monitor speaker to the right side of PHONE L/R. • Shock-test the unit by dropping it from a height of 10 cm, then confirm that the unit produces no unusual noise. • Press the pedal’s ON/OFF switch to return from Test mode to the normal operating mode. • Adjust the volume as described below. E.LEVEL: Maximum (turned completely to the right) E.LEVEL:
Minimum (turned completely to the left) E.LEVEL: Maximum (turned completely to the right) MODE: STANDARD (5 V/DIV, 1 mS/DIV) 12. SDRAM Check If “+4” appears in the LCD, first turn off the power, then use the procedure below to turn the power back on, and perform the following test. • Set the MODE control to “REVERSE.” If no problem is detected, “Sd 0” appears in the LCD. • While holding down the left pedal (ON/OFF), turn on the power. If a problem is detected, the cause is indicated by the LEDs as shown below. ON/OFF, MEMORY, TAP LEDs flashing: SDRAM error • Press the [SELECT] switch a number of times until “out1” appears in the LCD. 13.
MODE Volume Operational Check • Press the [WRITE] switch. • Connect the noise meter to OUTPUT A(MONO). Connect an open plug to OUTPUT B. • Following the “SDRAM Check,” rotate the knob one click at a time in the left (counterclockwise) direction. • Confirm that the numbers appearing in the LCD change one by one with each click from “10” to “1.” • Confirm that the measured value with the noise meter (IHF-A) is -85 dBu or less. 14. Factory Reset • Connect the noise meter to OUTPUT B. Connect the open plug to OUTPUT A(MONO). • Confirm that the measured value with the noise meter (IHF-A) is -85 dBu or less. • Connect a monitor speaker to OUTPUT A(MONO). Connect the open plug to OUTPUT B.
• Shock-test the unit by dropping it from a height of 10 cm, then confirm 20