P-250
35
TEST PROGRAM
1. Preparation
1) Measuring instruments: Frequency counter, level meter (with JIS-C filter)
Note) [PHONES] jack: 33
Ω
load, [AUX OUT] jack: 10 k
Ω
load
2) Jigs: Foot pedal (FC3 or FC4), MIDI cable, USB cable, PC (Personal computer)
3) Set the following state of each control knobs.
[SONG BALANCE]:
Center
[MODULATION]:
Min
MASTER EQ. [LOW] – [HIGH]:
Center
2. How to enter the Test Program
While pressing the [C#2], [F2] and [G#2] keys, turn on the [POWER] switch.
3. Proceeding through the Test Program
When the test program is activated, the sign “TEST P-250” appears on the LCD display.
Select the test program item by pressing the [UP
] or [DOWN
] button of [TEMPO].
Press the [MIDI OUT] button to execute testing.
When the test result is OK, press the [MIDI OUT] button to return to the screen of test items for selection. Select the next test item by
pressing the [UP
] or [DOWN
] button of [TEMPO]. When the test result is OK, an asterisk (*) is added in front of its item name
on display.
When the test result is NG, press the [SONG SELECT] button of [
] to return to the screen of test items for selection and then turn off
the [POWER] switch to end the test program.
4. Test program list
No.
1
2
3
4
5
6
7
8
9
10
11
LCD (initial)
001:Main Version
002:Wave Version
003:Main Rom Chk1
004:Main Ram Chk1
005:FlashRom Chk1
006:WaveRom Chk1
007:EffectRam Chk
008:TG Chk
009:Pitch Chk
010:Output R
011:Output L
Test Function and Judgment criteria
Displays the Main ROM version.
The ROM (Program) version is displayed.
Displays the Wave ROM version.
The Wave ROM version is displayed.
Checks ROMs that are connected to the CPU bus.
Outputs the C4 sine wave when the check result is OK and “Main Rom Chk1 OK” is displayed on the LCD
display.
Checks RAMs that are connected to the CPU bus.
Outputs the C4 sine wave when the check result is OK and “Main Ram Chk1 OK” is displayed on the LCD display.
Checks Flash Memories that are connected to the CPU bus.
Outputs the C4 sine wave when the check result is OK and “Flash Chk1 OK” is displayed on the LCD display.
Checks Wave ROMs.
Outputs the C4 sine wave when the check result is OK and “WaveRom Chk1 OK” is displayed on the LCD display.
Checks the effect RAM.
Outputs the C4 sine wave when the check result is OK and displays “effectRam Chk OK” is displayed on the
LCD display.
Checks the Sound Source (Autoscale).
Sequentially outputs the sine wave by changing the tone of the sound source from the low keys (from C2 to G4).
Check by hearing that the produced sound is free from noise and abnormal sound. “TG1 Chk End” is displayed
on the LCD display.
Checks the pitch.
Connect the frequency counter to the [PHONES] jack.
Outputs the sine wave at 440.5
±
0.2 Hz (PAN = Center) when the test is performed.
Checks the R channel output.
Connect the level meter (with a JIS-C filter) to each output terminal.
Set the [MASTER VOLUME] at the MAX. position and check the output level of the R channel. (1 kHz sine
wave, PAN = R)
PHONES L: Shall be more than 40 dBm smaller than Rch
PHONES R: +3.0 dBm
±
2 dB
OUTPUT L/MONO: Shall be more than 50 dBm smaller than Rch
OUTPUT R: -0.5 dBm
±
2 dB
Checks the L channel output.
Connect the level meter (with a JIS-C filter) to each terminal.
Set the [MASTER VOLUME] at the MAX. position and check the output level of the L channel. (1 kHz sine
wave, PAN = R)
PHONES L: +3.0 dBm
±
2 dB
PHONES R: Shall be more than 40 dBm smaller than Lch
OUTPUT L/MONO: -0.5 dBm
±
2 dB
OUTPUT R: Shall be more than 50 dBm smaller than Lch
