Yamaha TYROS 2 Service Manual page 81

19 019:EQ Low Chk
20 020:EQ Mid Chk
21 021:EQ High Chk
22 022:SP MUTE Chk
23 023:Mute Chk
25 025:MIC L Chk
26 026:MIC R Chk
3) 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 noise levels are as follows.
L: -80.0dBu or less
R: -80.0dBu or less
4) Connect a level meter to the [LINE OUT] jack (SUB1) with a load of
10k ohm and set the [MASTER VOLUME] knob to maximum.
Confirm that the noise leve is -80.0 dBu or less.
5) Connect a level meter to the [LINE OUT] jack (SUB2) with a load of
10k ohm and set the [MASTER VOLUME] knob to maximum.
Confirm that the noise leve is -80.0 dBu or less.
Checks the frequency of EQ LOW.
The sine wave of about 65.4Hz is output from the [LINE OUT] jack (MAIN
L/L+R, MAIN R, SUB1, SUB2).
Checks the frequency of EQ MID.
The sine wave of about 523Hz is output from the [LINE OUT] jack (MAIN L/
L+R, MAIN R, SUB1, SUB2).
Checks the frequency of EQ HIGH.
The sine wave of about 4186Hz is output from the [LINE OUT] jack (MAIN
L/L+R, MAIN R, SUB1, SUB2).
Checks the SP mute.
When the test is executed, the sine wave of about 4186Hz is output from
the [LINE OUT] jack (MAIN L/L+R, MAIN R).
Confirm that the 'ON' and 'OFF' of SP MUTE can be toggled by pressing
the TAB[<] button or the TAB[>] button.
Checks the mute.
When the test is executed, the sine wave of about 4186Hz is output from
the [LINE OUT] jack (MAIN L/L+R, MAIN R).
Confirm that the 'ON' and 'OFF' of MUTE can be toggled by pressing the
TAB[<] button or the TAB[>] button.
Checks the input levels of MIC/LINE IN L.
Connect a level meter to the [AUX OUT/LOOP SEND] jack (L/L+R, R) with
a load of 10k ohm.
Apply a 1kHz sine wave at -45dBu to the [MIC/LINE IN L/L+R] jack with a
load of 10k ohm, and set the [INPUT VOLUME] and [MIC/LINE IN TRIM]
knobs to maximum.
Confirm that the level meter reads the following value.
L: +13.0 2dBu
Checks the input levels of MIC/LINE IN R.
Connect a level meter to the [AUX OUT/LOOP SEND] jack (L/L+R, R) with
a load of 10k ohm.
Apply a 1kHz sine wave at -45dBu to the [MIC/LINE IN R] jack with a load
of 10k ohm, and set the [INPUT VOLUME] and [MIC/LINE IN TRIM] knobs
to maximum.
Confirm that the level meter reads the following value.
R: +13.0 2dBu
Tyros2
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