Yamaha P-115B, Руководство по обслуживанию

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P-115B/P-115WH/P-45B
P-45B P-115B/P-115WH
Test■item Test■function■and■judgment■criteria
No. Key No. Key
– – 2 D#1 Memory check
1 all
Executes the simplified check of the Master ROM, RAM, Wave ROM and Effect RAM
connected to the CPU bus.
1) Press the [D#1] key, and testing is executed.
2) For the OK test result, the C4 sine wave sounds (for 1 second).
For the NG test result, the C2 sine wave sounds (continuously until any key is
pressed).
3) Press the lowest key to exit the TEST item.
* If the test result is OK, tests No.3 – No.6 can be omitted.
3 D1 3 D1 ROM
(Master ROM)
check 1 Executes the simplified check of the ROM checksum connected to the CPU bus.
1) Press the [D1] key, and testing is executed.
2) For the OK test result, the C4 sine wave sounds (for 1 second).
For the NG test result, the C2 sine wave sounds (continuously until any key is
pressed).
3) Press the lowest key to exit the TEST item.
– – 4 E1 RAM check 1 Executes the simplified check of the RAM verification connected to the CPU bus.
1) Press the [E1] key, and testing is executed.
2) For the OK test result, the C4 sine wave sounds (for 1 second).
For the NG test result, the C2 sine wave sounds (continuously until any key is
pressed).
3) Press the lowest key to exit the TEST item.
– – 5 F1 Wave ROM
check 1 Executes the simplified check of the Wave ROM checksum connected to the CPU bus.
1) Press the [F1] key, and testing is executed.
2) For the OK test result, the C4 sine wave sounds (for 1 second).
For the NG test result, the C2 sine wave sounds (continuously until any key is
pressed).
3) Press the lowest key to exit the TEST item.
– – 6 A1 Effect RAM
check 1 Executes the simplified check of the Effect RAM verification connected to the CPU bus.
1) Press the [A1] key, and testing is executed.
2) For the OK test result, the C4 sine wave sounds (for 1 second).
For the NG test result, the C2 sine wave sounds (continuously until any key is
pressed).
3) Press the lowest key to exit the TEST item.
9 B1 7 B1 Pitch check Checks whether or not the correct pitch is output from this instrument.
1) Connect the level meter to the [PHONES] jack.
2) Connect the frequency counter to the [PHONES] jack at either L or R.
3) Set the MASTER VOLUME slider to the maximum position.
4) Press the [B1] key, the A3 sine wave sound is produced.
5) Measure the frequency and confirm that the measured value is 441.0Hz ± 0.2Hz.
Volume decline
value 6) Set the MASTER VOLUME slider to the minimum position.
7) Measure the output level and confirm that the measured values are within the speci-
fied range.
P-115B/P-115WH
PHONES L
:
-72.0 dBu or less, PHONES R
:
-72.0 dBu or less
P-45B
PHONES L
:
-78.0 dBu or less, PHONES R
:
-78.0 dBu or less
8) Press the lowest key to exit the TEST item, and sound production is stopped.