Yamaha TYROS 2 Service Manual page 82

Tyros2
- AUX IN/LOOP RETURN Chk
27 027:SW,LED Chk
28 028:All LED On
29 029:Red LED On
30 030:Green LED On
31 031:Other LED On
33 033:All LCD On
34 034:All LCD Off Chk
82
Checks the input levels of AUX IN/LOOP RETURN.
Connect a level meter to the [LINE OUT] jack (MAIN L/L+R) with a load of
10k ohm.
Apply a 1kHz sine wave at -20dBu to the [AUX IN/LOOP RETURN] jack (L/
L+R,R), and set the [AUX IN/LOOP RETURN TRIM VOLUME] and [MAS-
TER VOLUME] knobs to maximum.
Confirm that the level meter reads the following value.
L: +2.0 2dBu
R: +2.0 2dBu
Checks all switches and LEDs on the panel.
When the test is executed, the LCD shows the name of switches in order.
Press the switch indicated on the LCD.
When it is normal, the note corresponding to the switch sounds.
(See Page 87 TABLE1.)
If it is a LED-attached switch, the LED lights. (In case of dual-colour LED,
the LED illuminates red.)
In case of NG, the following messages are indicated on the LCD.
1) "NG(ID 0:***,X:***)"
O:***: ID of the switch to be pressed
X:***: ID of the pressed switch
2) "OverTwoSW" (When plural switches are pressed at the same time.)
After all the switch tests are finished, the LCD shows "DIAL DOWN 50".
Turn the [DATA ENTRY] dial counterclockwise.
At that time, confirm that the value on the LCD decreases.
Then the LCD shows "DIAL UP 0".
So turn the [DATA ENTRY] dial clockwise.
At that time, confirm that the value on the LCD increases.
When the value reaches "100", confirm that the LCD shows "END".
All LEDs light up.
Confirm that all LEDs on the panel light up.
The lighting area is divided into two.
The area can be switched by pressing the TAB[<] or TAB[>] button.
*In case of dual-colour LED, the LED illuminates orange.
All of red LEDs light up.
Confirm that all of red LEDs on the panel light up.
The lighting area is divided into two.
The area can be switched by pressing the TAB[<] or TAB[>] button.
* In case of dual-colour LED, the LED illuminates red.
All of green LEDs light up.
Confirm that all of green LEDs on the panel light up.
The lighting area is divided into two.
The area can be switched by pressing the TAB[<] or TAB[>] button.
* In case of tri-color LED, the LED illuminates green.
Checks all the LEDs other than red and green.
Confirm that the following LEDs light up.
LED(orange): PLAY/PAUSE of HARD DISK RECORDER
LED(white): MUSIC FINDER.
Chk All dots of the LCD turn on
Confirm that all dots of the LCD turn on. (The whole screen turns to black.)
All dots of the LCD turn off
Confirm that all dots of the LCD turn off. (The whole screen turns to white.)
MO
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