Yamaha YPT-220 Manuel - Page 21

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TEST PROGRAM

Preparations

1) Use an AC adaptor PA-3C or PA-130.

2) Measuring device: Frequency counter, which can detect thousandth value or more, Level meter (with JIS-C ﬁ lter), Oscilloscope

Note: Use a stereo plug and connect a load resistor of 33 Ω to the [PHONES/OUTPUT] jack for measurement unless

otherwise speciﬁ ed. Input impedance of the measuring device should be 1 MΩ or more.

3) Jig: Foot switch (FC-4 or FC-5), MIDI cable

4) Controller settings

MASTER VOLUME : MAX

PEDAL

REVERB

Others

Starting up the Test Program

While holding down the keys [C#2], [F2] and [G#2] simultaneously, press the [STANDBY / ON] switch.

C#2

G#2

Test procedure

1) When the test program is started, "TEST" will be displayed on the LCD.

2) Press the [–] or [+] button of the number buttons to select a test program item.

3) Press the [START/STOP] button to execute the test.

If the result is OK or test item is completed, press the [START/STOP] button again to return to the item selection display.

Press the [–] or [+] button of the number buttons to select the next test item.

A cursor ("_") is shown below the ﬁ rst character of the item for which the test results are OK.

If the result is NG, press the lowest key (white key C1) to return to the item selection display.

Test Program List

TEST No

LCD display

001: Version

002: Rom Chk1

011: TG1 Chk

013: Pit Chk

014: Output R

015: Output L

: OFF

: Initial setting when the power is turned on

Displays version of the ROM.

∗∗∗

Prog" is displayed on the LCD.

Checks the ROM connected to the CPU bus.

Make sure that "Rom OK" is displayed on the LCD.

Plays each key automatically in the order of scale (auto-scaling). (32 notes from C2 to G4 will be played.)

Make sure that there is no abnormal sounds or noise. When the auto-scaling is ﬁ nished, "TG1 End"

will be shown. Press a key to play a sound. (Single note, the key pressed ﬁ rst will be played)

Checks pitch accuracy.

Connect the frequency counter to the [PHONES/OUTPUT] jack. (Either L or R)

Make sure that the correct signal is output. (440.14 Hz ± 0.22 Hz)

Connect the level meter (with JIS-C ﬁ lter) to the L/R of the [PHONES/OUTPUT] jack.

(33 Ω load)

Set the [MASTER VOLUME] to the maximum level and check the output level.

· PHONES L: –45.0 dBu or less

Connect the level meter (with JIS-C ﬁ lter) to the L/R of the [PHONES/OUTPUT] jack.

(33 Ω load)

Set the [MASTER VOLUME] to the maximum level and check the output level.

· PHONES L: –1.0 dBu ± 2 dB

Test descriptions, judging conditions, etc.

· PHONES R: –1.0 dBu ± 2 dB

· PHONES R: –45.0 dBu or less

PSR-E223/YPT-220

(dBu=dBm)

∗∗∗

: Version