Roland syb-5, Service Notes

11

SYB-5

18. Noise Check

• Connect the DC plug to the adapter jack.

*

As this check places a drain on the batteries, use the adapter when performing 
this check.

• Confirm that CHECK is lit and that the effects are on.

• Set the volume controls as shown in the figure.

fig.test-NOISE.eps_30

• Connect the 47 k

Ω

 short plug to the INPUT jack.

• Connect plugs to both the OUTPUT A(MONO) and OUTPUT B jacks and  

check the residual noise from both jacks with the noise meter. Confirm 
that both are at or below -92 dBm(IHF-A).

• Connect the monitor speakers to the OUTPUT A(MONO) and OUTPUT 

B jacks.

• Press the pedal to switch the effects on and off, and confirm that no 

switching noise is produced.

• Press the pedal so that the effects are on, and rotate each of the knobs, 

confirming that no abnormal sounds are produced.

• Set the EFFECT volume to MIN and the DIRECT volume to MAX so that 

only the direct sound is output.

• Shock-test the unit by dropping it from a height of 10 cm twice. Confirm 

that no unusual noise is output from OUTPUT B.

• Disconnect the plug form the OUTPUT B jack.

• Shock-test the unit by dropping it from a height of 10 cm twice. Confirm 

that no unusual noise is output from OUTPUT A(MONO).

• Switch the pedal between ON and OFF, and confirm that no switching 

noise is produced.