Yamaha psr-262 Manuale di servizio - Pagina 15
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TEST PROGRAM
1. TEST PROGRAM
A. PREPARATION
1. PA-3B (AC adaptor) is used. (PA-32, PA-3 are utilizable)
2. The volume is usually moved to the use position when no volume change is required.
3. Measuring instruments:
Frequency counter
Level meter (with a JIS-C filter)
Note: Use a stereo plug and connect the 33 ohm load to the [PHONES / AUX OUT] jack.
4. Jigs:
Foot switch (FC-4, FC-5), MIDI cable
B. HOW TO ENTER THE TEST PROGRAM
While pressing the C2#, F2 and G2# keys, turn on the [STAND BY / ON] switch.
C. PROCEEDING THROUGH THE TEST PROGRAM
The LCD will display "TEST" when entering the test program.
To select the program number, use the [TENKEY +] button.
To execute the test, press the [START / STOP] button.
To proceed to the next test, press the [START / STOP] button.
D. TEST PROGRAM LIST
No. LCD display
1
001: Version
2
002: Rom Chk 1
3
003: Ram Chk 1
11
011: TG1 Chk
13
013: Pit Chk
14
014: Output R
15
015: Output L
19
019: Noise
Test Function and Judgment Criteria
Displays ROM version
ROM (Program, Wave) versions are displayed alternately on the LCD.
Checks the ROM
The test result appears on the LCD.
Checks all the RAMs which are connected to the CPU
The test result appears on the LCD.
Outputs the sine wave by changing the channels in sequence from C2 to D#3.
After auto-scaling is finished, individual keys can be played. (If playing two or more keys
simultaneously, the first pressed key has priority to make a sound.)
Connect the frequency counter to the [PHONES / AUX OUT] jack.
Check that the 440 Hz + 1.76 Hz signal is output.
Connect the level meter (with a JIS-C filter) to the [PHONES / AUX OUT] jack. (33 ohm load)
Set the [MASTER VOLUME ] at maximum.
Check the output level (1kHz).
Phones L: Less than -60.0 dBm (-60.6 dBm at the 30 ohm load)
Phones R: -25.5 dBm +/- 2 dB (-26.1 dBm +/- 2 dB at the 30 ohm load)
Connect the level meter (with a JIS-C filter) to the [PHONES / AUX OUT] jack. (33 ohm load)
Set the [MASTER VOLUME ] at maximum.
Check the output level (1kHz).
Phones L: -25.5 dBm +/- 2 dB (-26.1 dBm +/- 2 dB at the 30 ohm load)
Phones R: Less than -60.0 dBm (-60.6 dBm at the 30 ohm load)
Connect the level meter (with a JIS-C filter) to the [PHONES / AUX OUT] jack. (33 ohm load)
Set the [MASTER VOLUME ] at maximum.
Phones L / R: Less than -80.0 dBm (-80.6 dBm at the 30 ohm load)
PSR-260/262
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