24
Dec.2004
10. DSP Thru Waveform check
fig.outputdacheck1.eps
10-1. Check the [MASTER OUTPUT]
waveform.
fig.outputdacheck2.eps
VOLT/DIV:2V TIME/DIV:1mS
10-2. Slowly turn [MASTER VOLUME]
toward the minimum position.
Verify that the square wave shown in the illustration from “OUTPUT L/R”
gradually decreases.
10-3. Slowly turn [MASTER VOLUME]
toward the maximum position.
Verify that the square wave shown in the illustration from “OUTPUT L/R”
gradually increases.
*
Note: The waveform must not abruptly increase or cut out.
*
Note: Misshapen waveforms or waveforms below the nominal level are NG.
10-4. Disconnect the plug from
[MASTER OUTPUT] R, and check the
waveform.
fig.outputdacheck3.eps
10-5. Insert the plug back into
[MASTER OUTPUT] R, and check the
waveform.
fig.outputdacheck4.eps
10-6. Disconnect the plug from
[MASTER OUTPUT] L (MONO), and
check the waveform.
fig.outputdacheck5.eps
10-7. Insert the plug back into
[MASTER OUTPUT] L (MONO), and
check the waveform.
fig.outputdacheck6.eps
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...
