Yamaha PSR-S750 Service Manual page 69

● Other Tests
AUX IN
Check that the output is as shown in the following table when signals are input to the AUX IN.
INPUT
AUX IN L: Sine wave (1 kHz, 0 dBu)
R: No input
AUX IN L: No input
R: Sine wave (1 kHz, 0 dBu)
Noise Level Check
Connect the level meter (with JIS-C fi lter) to the L/R of the [PHONES/OUTPUT] jack. (33 ohms load)
Set the [MASTER VOLUME] to the maximum level and check the noise level.
· PHONES L, R: –90 dBu or less
OUTPUT (10 kΩ load)
OUTPUT
L/L+R
+7.4 ± 2 dBu
-50.0 dBu or less
PHONES (33 Ω load)
R L
-50.0 dBu or less +1.8 ± 2 dBu
+7.4 ± 2 dBu -40.0 dBu or less
PSR-S750/PSR-S950
R
-40.0 dBu or less
+1.8 ± 2 dBu
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