Roland AC-90 Acoustic Chorus, Заметки по обслуживанию, Страница: 19 / 35

19
Jul. 2007 AC-90
6. Output-level Confirmation
With a dummy load resistor connected to the output jacks according to the following table, check the signal level at each end of the dummy resistor.
* The values shown are a rough guide. Actual values are subject to volume-production fluctuations. (Approx. +/-1.5 dBu with respect to the values in the table below)
* For the dummy load resistor, use the plug indicated under “Connection plug” in the table below, and connect the resistor between the output-connector signal line and ground.
When inspection testing is finished, switch off the power.
When inspection testing is finished, switch off the power.
Output connector Dummy load
resistor value Connection plug Output level during
GUITAR input Output level during
MIC input
DI OUT TIP 680 Ω (1/2 W) STEREO standard -8 dBu -8 dBu
DI OUT RING 680 Ω (1/2 W) STEREO standard -8 dBu -8 dBu
SUB WOOFER OUT (MASTER VR: MAX) 47 k
Ω
(1/2 W) MONO standard -11.5 dBu -11.5 dBu
LINE OUT (MONO) 47 k Ω (1/2 W) MONO standard -8 dBu -8.5 dBu
LINE OUT L (HOT) 680 Ω (1/2 W) XLR -10.5 dBu -10.5 dBu
LINE OUT L (COLD) 680 Ω (1/2 W) XLR -10.5 dBu -10.5 dBu
LINE OUT R (HOT) 680
Ω
(1/2 W) XLR -10.5 dBu -10.5 dBu
LINE OUT R (COLD) 680 Ω (1/2 W) XLR -10.5 dBu -10.5 dBu
PHONES L 100 Ω (1/2 W) STEREO standard -1.0 dBu -1.0 dBu
PHONES R 100
Ω
(1/2 W) STEREO standard -1.0 dBu -1.0 dBu