27
DR-880
12-2. Check the residual noise of
“MASTER OUT” L (MONO)/R.
Listen to the noise, and verify the following.
1.
Noise level: -73 dBu or less (both L and R)
2.
No abnormal sound is present in the output.
3.
No abnormal sound is produced when you apply physical shock to the
unit.
12-3. Check the residual noise of
“MASTER OUT” (PIN).
Listen to the noise, and verify the following.
1.
Noise level: -82 dBu or less (both L and R)
2.
No abnormal sound is present in the output.
3.
No abnormal sound is produced when you apply physical shock to the
unit.
12-4. Check the residual noise of
“INDIVIDUAL.”
Listen to the noise, and verify the following.
1.
Noise level: -77.5 dBu or less (both L and R)
2.
No abnormal sound is present in the output.
3.
No abnormal sound is produced when you apply physical shock to the
unit.
12-5. Check the residual noise of
“PHONES.”
Listen to the noise, and verify the following.
1.
Noise level: -72 dBu or less (both L and R)
2.
No abnormal sound is present in the output.
3.
No abnormal sound is produced when you apply physical shock to the
unit.
12-6. Check the residual noise of
“MASTER OUT” L (MONO)/R at the Hi-
Gain setting. (INPUT residual noise
check)
Press [BANK] to select “Hi-Gain.”
fig.inputadcheck4.eps
Listen to the noise, and verify the following.
1.
Noise level: -70 dBu or less (both L and R)
2.
No abnormal sound is present in the output.
3.
No abnormal sound is produced when you apply physical shock to the
unit.
13. Turn off the power.
Summary of Contents for DR-880
Page 11: ...11 DR 880...
Page 29: ...31 Dec 2004 DR 880 CIRCUIT BOARD MAIN BOARD fig b main1 eps View from components side...
Page 30: ...33 Dec 2004 DR 880 CIRCUIT BOARD MAIN BOARD fig b main2 eps View from foil side...
Page 34: ...41 Dec 2004 DR 880 CIRCUIT BOARD SW fig b sw1 eps View from components side...
Page 35: ...43 Dec 2004 DR 880 CIRCUIT BOARD SW fig b sw2 eps View from foil side...
