Roland syb-5 Service Notes page 10

Sep.2004
fig.test-MAX.eps_40
1V/DIV, 1mS/DIV
• Check the output level from both OUTPUT A(MONO) and OUTPUT B
with the noise meter. Confirm that each is between +3 dBm and +6
dBm(FLAT).
12. DSP MUTE Check
• Confirm that the MODE control is set to 7. CHECK lights up.
• Use the oscillator to input a sine wave at 200 Hz, +5 dBm (FLAT) to
INPUT.
• Check the waveform output from both OUTPUT A(MONO) and
OUTPUT B with the oscilloscope. Confirm that the waveform is the same
as that shown in the figure.
fig.test-MUTE.eps_40
1V/DIV, 1mS/DIV
• Check the output level from both OUTPUT A(MONO) and OUTPUT B
with the noise meter. Confirm that each waveform output is at or below -
71 dBm(FLAT).
13. ANALOG BYPASS Maximum Output Check
• Confirm that the MODE control is set to 8. CHECK goes out.
• Use the oscillator to input a sine wave at 200 Hz, +5 dBm (FLAT) to
INPUT.
• Check the waveform output from both OUTPUT A(MONO) and
OUTPUT B with the oscilloscope. Confirm that the waveform is the same
as that shown in the figure and that there is no distortion.
fig.test-MAX.eps_40
1V/DIV, 1mS/DIV
• Check the output level from both OUTPUT A(MONO) and OUTPUT B
with the noise meter. Confirm that each is between +3 dBm and +6
dBm(FLAT).
14. ANALOG MUTE Check
• Confirm that the MODE control is set to 9. CHECK lights up.
• Use the oscillator to input a sine wave at 200 Hz, +5 dBm (FLAT) to
10
INPUT.
• Check the waveform output from both OUTPUT A(MONO) and
OUTPUT B with the oscilloscope. Confirm that the waveform is the same
as that shown in the figure and that there is no distortion.
fig.test-MUTE.eps_40
1V/DIV, 1mS/DIV
• Check the output level from both OUTPUT A(MONO) and OUTPUT B
with the noise meter. Confirm that each waveform output is at or below
-74 dBm(FLAT).
15. ANALOG NOISE Check
• Confirm that the MODE control is set to 10. CHECK goes out.
• Connect the 47 kΩ short plug to the INPUT jack.
• Check the output level from both OUTPUT A(MONO) and OUTPUT B
with the noise meter. Confirm that output from each is at or below -98
dBm(IHF-A).
16. MODE Volume Check
• Confirm that the MODE control is set to 11. CHECK lights up.
• Confirm that the EV-5 is not connected to the EXP jack.
Slowly rotate the MODE control as shown in the figure, one click at a time, and
confirm that CHECK lights up and goes off as described below.
fig.test-ClickVR.eps_30
MODE 11: ON
MODE 10: OFF
MODE 9: ON
MODE 8: OFF
MODE 7: ON
MODE 6: OFF
MODE 5: ON
MODE 4: OFF
MODE 3: ON
MODE 2: OFF
MODE 1: ON
* If checking the MODE volume only, without performing all of the tests, rotate
the control in the reverse sequence of that described above (i.e., MODE 1 ->
MODE 11) and confirm that CHECK behaves as described.
17. Battery Check
• Press the pedal and confirm that CHECK lights up (so that the effects are
switched on).
• Confirm that a plug is connected to INPUT.
• Disconnect the DC plug from the adapter jack.
• Confirm that CHECK is lit.
* If CHECK is dimmer than when used with the adapter, it indicates that the
batteries are going dead.