Yamaha TYROS 2 Service Manual page 79

7 007:Wave RAM(DIMM) Chk1
8 008:Effect RAM Chk1
9 009:TG 1 Chk
10 010:TG2 Chk
14 014:Pitch Chk
15 015:Output R Chk
Checks all wave RAMs(DIMM).
Confirm that the LCD shows the memory capacity of DIMM as follows.
(The capacity is not checked automatically.).
"OK(DIMM H:512MB.L:512MB)"
In case of NG, the LCD shows "NG(DIMM H:512MB,L:512MB)xxxxxx NG".
(xxxxxx: DIMM's name)
Checks all effect RAMs.
Confirm that the LCD shows "OK".
In case of NG, the LCD shows "xxxxxx NG".(xxxxxx:RAM's name)
Checks the tone generator 1.
The sine waves from C2 to G4 automatically sound in order.
Confirm that no noise or no abnormal sound is generated.
When the test is finished, the LCD shows "End".
Checks the tone generator 2.
The sine waves from C2 to G4 automatically sound in order.
Confirm that no noise or no abnormal sound is generated.
When the test is finished, the LCD shows "End".
Checks pitch.
Connect a frequency counter to the [PHONES] jack (either L or R) with a
load of 33 ohm and set the [MASTER VOLUME] knob to maximum.
Confirm that the frequency counter shows "441.43
Checks the output level of R channel.
1) Connect a level meter to the [PHONES] jack (L, R) with a load of 33
ohm and set the [MASTER VOLUME] knob to maximum.
Confirm the output levels are as follows.
L: -55.0 dBu or less
R: +1.0 2 dBu
2) Connect a level meter to the [LINE OUT] jack (MAIN L/L+R, R) with a
load of 10k ohm and set the [MASTER VOLUME] knob to maximum.
(using two monaural jacks at the same time)
Confirm the output levels are as follows.
L: -75.0dBu or less
R: +9.5 2dBu
3) Connect a level meter to the [AUX OUT/LOOP SEND] jack (L/L+R, R)
with a load of 10k ohm and set the [MASTER VOLUME] knob to any
position. (using two monaural jacks).
Confirm the output levels are as follows.
L: -75.0dBu or less
R: +5.0 2dBu
4) Connect a level meter to the [WOOFER] jack (R) with a load of 470
ohm and set the [MASTER VOLUME] knob to maximum.
(L: Pin6-Pin3, R: Pin5-Pin3, Pin3: GND)
Confirm the output levels are as follows.
L: -65.0dBu or less
R: +5.5 2dBu
5) Connect optional speakers and disconnect the plug from the
[PHONES] jack.
Confirm that only the speaker of R channel generates sound.
Tyros2
0.22Hz".
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