Yamaha PSR-VN300 Service Manual - Page 20

TEST PROGRAM, Preparation, Start-up the Test Program, Test Procedure

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PSR-VN300 I TEST PROGRAM * If the test number 47 "Factory Set" is executed, the data already set will be lost. 1 Preparation 1) Use an AC adaptor PA-3C or PA-32. 2) Measuring device: Frequency counter, which can detect thousandth digit, Level meter (with JIS-C filter). Note: Connect a load resistor of 33 Ω to the terminal [PHONES/OUTPUT]. Input impedance of the measuring device should be 1 MΩ or more. 3) Jig: Foot switch (FC-4 or FC-5), MIDI cable. 4) Control condition MASTER VOLUME : MAX. PEDAL : OFF REVERB : OFF Others : Default status at the time of a power switch ON 2 Start-up the Test Program Holding down the keys [C2#], [F2], [G2#] simultaneously, press the [STANDBY/ON] switch. C2# G2# STANDBY/ON TEST F2 3 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 first character of the item for which the test results are OK. If the results are NG, press the lowest key in the keyboard (white key C1) to return to the item selection display. 4 Test program list (0 dBu = 0.775 V) Test No. LCD display 1 001 : Version 2 002 : Rom Chk1 3 003 : Ram Chk1 4 006 : FRomChk1 5 011 : TG1 Chk 6 013 : Pit Chk Test descriptions, judging conditions, etc. Displays version of the ROM. "[***] Prog" is displayed on the LCD. [***] : Version ROM connected to the bus of the CPU is checked. Make sure that "Rom OK" is displayed on the LCD. RAM connected to the bus of the CPU is checked. Make sure that "Ram OK" is displayed on the LCD. FROM connected to the bus of the CPU is checked. Make sure that "FRom 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.) Check that there is no abnormal sounds or noise. When the auto-scaling is finished, "TG1 End" will be shown. Press a key to play a sound. (Single note, the key pressed first will be played) Connect the frequency counter to the [PHONES/OUTPUT] terminal. (Either L or R) Checks pitch. (440.14 Hz ± 0.22 Hz) Check that the correct signal is output. 20

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PSR-VN300
20
■
TEST PROGRAM
*
If the test number 47
“
Factory Set
”
is executed, the data already set will be lost.
1
Preparation
1)
Use an AC adaptor PA-3C or PA-32.
2)
Measuring device: Frequency counter, which can detect thousandth digit, Level meter (with JIS-C filter).
Note:
Connect a load resistor of 33
Ω
to the terminal [PHONES/OUTPUT]. Input impedance of the measuring device
should be 1 M
Ω
or more.
3)
Jig: Foot switch (FC-4 or FC-5), MIDI cable.
4)
Control condition
MASTER VOLUME
: MAX.
PEDAL
: OFF
REVERB
: OFF
Others
: Default status at the time of a power switch ON
2
Start-up the Test Program
Holding down the keys [C2#], [F2], [G2#] simultaneously, press the [STANDBY/ON] switch.
G
TEST
F2
C2#
2#
STANDBY/ON
3
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 first character of the item for which the test results are OK.
If the results are NG
, press the lowest key in the keyboard (white key C1) to return to the item selection display.
4
Test program list
Test No.
1
2
3
4
5
6
LCD display
001
: Version
002
: Rom Chk1
003
: Ram Chk1
006
: FRomChk1
011
: TG1 Chk
013
: Pit Chk
Test descriptions, judging conditions, etc.
Displays version of the ROM.
“[
***
]
Prog
” is displayed on the LCD.
[
***
] : Version
ROM connected to the bus of the CPU is checked.
Make sure that “
Rom OK
” is displayed on the LCD.
RAM connected to the bus of the CPU is checked.
Make sure that “
Ram OK
” is displayed on the LCD.
FROM connected to the bus of the CPU is checked.
Make sure that “
FRom 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.)
Check that there is no abnormal sounds or noise. When the auto-scaling is finished, “
TG1 End
” will be shown.
Press a key to play a sound. (Single note, the key pressed first will be played)
Connect the frequency counter to the [PHONES/OUTPUT] terminal. (Either L or R)
Checks pitch. (440.14 Hz
±
0.22 Hz)
Check that the correct signal is output.
(0 dBu = 0.775 V)