Yamaha DG80-112 Service Manual page 16

DG80-112
(Test Contents)
The DG80-112 sets the conditions for the signal
Sound Check through the analogue circuit, the A/D
converter, the DSP-3 and the D/A Converter.
When the Sound Check is started, the LED display
shows "81". The Sound Check has two conditions.
If the [RECALL] key is pressed when the LED
display shows "81", the LED display changes to
"82" and the condition changes to the next as below.
81 : DSP3-1
82 : DSP3-2
Check the following items in each condition of "81"
and "82".
Items
1. Input Sensitivity 1 kHz, -30 dBm
(High)
2. Input Sensitivity 1 kHz, -20 dBm
(Low)
3. RETURN Level 1 kHz, 0 dBm
4. SEND Level Condition of 1. and
100 k ohms SEND
load
5. LINE OUT Condition of 1. and
Level 100 k ohms LINE
OUT load
6. Frequency -40 dBm Input
Response 1 kHz standard
(HIGH IN) SP Output Terminal
7. Remain Noise TRIM, OUTPUT
VR MIN IHF A net
8. Sensitivity of Lo Input
LED for Input TRIM Vol:
Level
OUTPUT Vol:
9. Output RETURN,10 %THD
* 0 dBm = 0.775 V
If the Sound Check has been finished, press the
[RECALL] key when the LED display shows "82".
The LED display shows "9".
(Error Number)
not appearing
20
Conditions Responses
(standards)
+28 dBm +/-2 dB
+28 dBm +/-2 dB
+28 dBm +/-2 dB
-1 dBm +/-2 dB
+3 dBm +/-2 dB
100 Hz: 0.5 +/-1 dB
10 kHz: 0.5 +/-1 dB
less than -60 dBm
Input LED
-30 dBm: no light
maximum -20 dBm: GR only
+4 dBm: both lit
maximum
more than +28 dBm
(95 W)
Load = 4 ohms
9. TEST END
A "9" on the LED display signals the end of the
TEST and the exit of the Test Program. Press the
[RECALL] key when the LED display shows "9".
The mode of the DG80-112 changes to the normal
mode and all of the function data are set to the
condition of the latest program number in normal
mode. The Motor Drive Volumes rotate
automatically to the settings of that data.