Yamaha P-120 Service Manual page 28

P-120/P-120S
(15: Output Level L Check
15
OPL
16 (16: EQ Low Check
EqL
(17: EQ Mid Check
17
Eqm
18 (18: EQ High Check
EqH
(19: D/A Converter Noise Check Connect a level meter to the [PHONES] jack. (Application load is 33Ω)
19
dA
28
Connect a level meter to the [AUX OUT LEVEL FIXED L] jack and the [AUX
OUT LEVEL FIXED R] jack. (Application load is 10kΩ)
Acceptable level ranges are as follows.
L: -75.0 [dBm] or less
R: +1±2 [dBm]
Connect a level meter to the [PHONES] jack. (Application load is 33Ω)
Acceptable level ranges are as follows.
1-L, 2-L: +5.5±2 [dBm]
1-R, 2-R: -55.0 [dBm] or less
Connect a level meter to the [AUX OUT L/L+R] jack and the [AUX OUT R]
jack. (Application load is 10kΩ)
Acceptable level ranges are as follows.
L/L+R: +10.5±2 [dBm]
R: -60.0 [dBm] or less
Connect a level meter to the [AUX OUT LEVEL FIXED L] jack and the [AUX
OUT LEVEL FIXED R] jack. (Application load is 10kΩ)
Acceptable level ranges are as follows.
L: +1±2 [dBm]
R: -75.0 [dBm] or less
For factory test only.
For factory test only.
For factory test only.
Acceptable level range is as follows when any key is depressed.
L, R: -85.0 [dBm] or less
Make sure by hearing that no abnomal sound is produced.
It is enough to measure for either PHONES 1 or PHONES 2.
Remaining Noise Measurement
This measurement must be performed when the system is in the wait state (in
which any test item is not running).
Connect a level meter to the [PHONES] jack. (Application load is 33Ω)
Acceptable level range is as follows.
L, R: -85.0 [dBm] or less
Connect a level meter to the [AUX OUT L/L+R] jack and the [AUX OUT R]
jack. (Application load is 10kΩ)
Acceptable level range is as follows.
L/L+R, R: -80.0 [dBm] or less