Yamaha TYROS 2 Service Manual page 80

Tyros2
16 016:Output L Chk
17 017:Output Sub-1 Chk
18 018:Output Sub-2 Chk
- Noise Level Check
80
Output L Check.
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: +1.0 2dBu
R: -55.0dBu or less
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: +9.5 2dBu
R: -75.0dBu or less
3) Connect a level meter to the [AUX OUT/LOOP SEND] jack (L/L+R, R)
with a load of 470 ohm and set the [MASTER VOLUME] knob to any
position.
(using two monaural jacks).
Confirm the output levels are as follows.
L: +5.0 2dBu
R: -75 dBu or less
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: +5.5 2dBu
R: -65 dBu or less
5) Connect optional speakers and disconnect the plug from the
[PHONES] jack.
Confirm that only the speaker of L channel generates sound.
Checks the output level of LINE OUT SUB1.
Connect a level meter to the [LINE OUT] jack (SUB1, SUB2) with a load of
10k ohm and set the [MASTER VOLUME] knob to maximum.
Confirm the output levels are as follows.
SUB1: +3.0 2dBu
SUB2: -75.0dBu or less
Checks the output level of LINE OUT SUB2.
Connect a level meter to the [LINE OUT] jack (SUB1, SUB2) with a load of
10k ohm and set the [MASTER VOLUME] knob to maximum.
Confirm the output levels are as follows.
SUB1: -75.0dBu or less
SUB2: +3.0 2dBu
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 noise levels are as follows.
L: -80.0dBu or less
R: -80.0dBu or less
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 noise levels are as follows.
L: -75.0dBu or less
R: -75.0dBu or less
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