Yamaha PortaTone PSR-350 Руководство по эксплуатации - Страница 19
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TEST PROGRAM
1. PREPARATION
1) PA-5C (AC adaptor) is used.
2) The volume is usually moved to the use position when
no volume change is required.
3) Measuring instruments : frequency counter, level meter
(with JIS-C filter)
Note : Connect a stereo plug to the [PHONES/OUTPUT]
jack at 33 ohms.
4) Jigs : foot switch, MIDI cable, floppy disk (2HD & 2DD)
2. HOW TO ENTER THE TEST PROGRAM
MANUAL MODE :
While pressing the C2#, F2 and G2# keys, turn the
[STANDBY/ON] switch on.
4. TEST PROGRAM LIST
TEST No.
LCD (initial)
001Version
1
002Rom Chk1
2
3
003Ram Chk1
4
004WRomChk1
005WRamChk1
5
007FDD Chk
7
011TG1 Chk
11
013Pit Chk
13
014Output R
14
15
015Output L
019Noise
19
3. PROCEEDING THROUGH THE TEST
PROGRAM
MANUAL MODE :
1) When the test program is started, "TEST" appears on
2) Select the test program item to be executed by pressing
3) Press the [START/STOP] button to execute testing.
Test Functions and Judgment Criteria
Displays ROM version.
ROM (Program, Wave) versions are displayed alternately on the LCD.
Checks the ROM.
The test results appear on the LCD.
Checks all the RAMs that are connected to the CPU.
The test results appear on the LCD.
Checks the WAVE ROMs that are connected to the CPU.
The test results appear on the LCD.
Checks the WAVE RAMs that are connected to the CPU.
The test results appear on the LCD.
Insert the floppy disks one by one (2DD and 2HD).
Checks the floppy disk drive unit
Outputs the sine wave by changing the channels in sequence from C2 to G4.
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] jack.
Sets PAN to Center and produces a signal at 440.0 Hz +/- 1.76 Hz
Check that the correct signal is produced.
Connect the level meter (with a JIS-C filter) to the [PHONES] jack. (33 ohm load)
Set the [MASTER VOLUME] at maximum and check the output level (1 kHz).
PHONES L : less than -45.0 dBm
Connect the level meter (with a JIS-C filter) to the [PHONES] jack. (33 ohm load)
Set the [MASTER VOLUME] at maximum and check the output level (1 kHz).
PHONES L : -6.0 dBm +/- 2 dB
Connect the level meter (with a JIS-C filter) to the [PHONES] jack. (33 ohm load)
Set the [MASTER VOLUME] at maximum. Check D/A converter noise.
PHONES L/R : Less than -75.0 dBm
the LCD.
the [-/NO] or [+/YES] button.
When the test result is OK, press the [START/STOP]
button to return to the test item name on display.
Proceed to the next test by pressing the [-/NO] or [+/
YES] button.
When the test result is OK, a cursor (_) is added under
the first character of the test item name on display.
When the test result is NG, press the [DEMO] button or
the lowest (leftmost) white key on the keyboard to return
to the test item name on display and then turn off the
[STANDBY/ON] switch to end the test program.
PHONES R : -6.0 dBm +/- 2 dB
PHONES R : less than -45.0 dBm
PSR-350
25